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description Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2019Embargo end date: 04 Jun 2019Publisher:Hannover : Institutionelles Repositorium der Leibniz Universität Hannover Authors: Christoph Haisch;doi: 10.15488/4937
Im Rahmen dieser Arbeit wurden solaraktive Wolframtrioxid-Photoelektroden für ein Verfahren untersucht, bei welchem mithilfe von Sonnenenergie Schadstoffe aus dem Wasser abgebaut werden und simultan Wasserstoff als Energieträger erzeugt wird. Um diese duale Nutzung des Sonnenlichts zu ermöglichen, wurden die photokatalytisch aktiven Wolframtrioxid-Elektroden auf ihre physikalischen, optischen und photoelektrochemischen Eigenschaften untersucht. In the scope of this work, solar light active tungsten trioxide photoelectrodes were tested for a process, in which solar energy is used to decompose organic pollutants in water, and simultaneously generate hydrogen as an energy carrier. To enable this dual use of sunlight, photocatalytically active tungsten trioxide electrodes were investigated for their physical, optical and photoelectrochemical properties.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.15488/4937&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2019Embargo end date: 04 Jun 2019Publisher:Hannover : Institutionelles Repositorium der Leibniz Universität Hannover Authors: Christoph Haisch;doi: 10.15488/4937
Im Rahmen dieser Arbeit wurden solaraktive Wolframtrioxid-Photoelektroden für ein Verfahren untersucht, bei welchem mithilfe von Sonnenenergie Schadstoffe aus dem Wasser abgebaut werden und simultan Wasserstoff als Energieträger erzeugt wird. Um diese duale Nutzung des Sonnenlichts zu ermöglichen, wurden die photokatalytisch aktiven Wolframtrioxid-Elektroden auf ihre physikalischen, optischen und photoelektrochemischen Eigenschaften untersucht. In the scope of this work, solar light active tungsten trioxide photoelectrodes were tested for a process, in which solar energy is used to decompose organic pollutants in water, and simultaneously generate hydrogen as an energy carrier. To enable this dual use of sunlight, photocatalytically active tungsten trioxide electrodes were investigated for their physical, optical and photoelectrochemical properties.
add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.15488/4937&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.15488/4937&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 14 Mar 2016 GermanyPublisher:Universität Ulm Authors: Köpke, Michael;doi: 10.18725/oparu-1244
Clostridium ljungdahlii was metabolically engineered for the production of bulk chemical and next generation biofuel 1-butanol from synthesis gas by transformation with a plasmid harbouring the butanol synthesis genes from Clostridium acetobutylicum. Synthesis gas (a mixture of CO, CO2 and H2) can be easily produced by gasification of biomass or municipal waste. Thus, this process presents an alternative to conventional butanol fermentation (which uses corn or sugar as substrate and therefore competes with the food industry) and also chemical butanol production (which starts from propen obtained from non-renewable sources). To optimize the process, metagenomic libraries from environmental sources were screened for novel butanol dehydrogenases. Four respective enzymes could be identified and characterized in detail. Further studies on the metabolism of C. ljungdahlii revealed a new type of energy conservation in acetogenic bacteria. There are indications that Clostridium difficile might also belong to this group, as respective genes were found in the genome sequence and weak autotrophic growth occurred on a mixture of CO2 and H2.
Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18725/oparu-1244&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 3 citations 3 popularity Top 10% influence Top 10% impulse Average Powered by BIP!
more_vert Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18725/oparu-1244&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 14 Mar 2016 GermanyPublisher:Universität Ulm Authors: Köpke, Michael;doi: 10.18725/oparu-1244
Clostridium ljungdahlii was metabolically engineered for the production of bulk chemical and next generation biofuel 1-butanol from synthesis gas by transformation with a plasmid harbouring the butanol synthesis genes from Clostridium acetobutylicum. Synthesis gas (a mixture of CO, CO2 and H2) can be easily produced by gasification of biomass or municipal waste. Thus, this process presents an alternative to conventional butanol fermentation (which uses corn or sugar as substrate and therefore competes with the food industry) and also chemical butanol production (which starts from propen obtained from non-renewable sources). To optimize the process, metagenomic libraries from environmental sources were screened for novel butanol dehydrogenases. Four respective enzymes could be identified and characterized in detail. Further studies on the metabolism of C. ljungdahlii revealed a new type of energy conservation in acetogenic bacteria. There are indications that Clostridium difficile might also belong to this group, as respective genes were found in the genome sequence and weak autotrophic growth occurred on a mixture of CO2 and H2.
Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18725/oparu-1244&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 3 citations 3 popularity Top 10% influence Top 10% impulse Average Powered by BIP!
more_vert Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18725/oparu-1244&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 03 Sep 2009 ItalyPublisher:Universität Stuttgart Authors: König, Andreas;doi: 10.18419/opus-1816
Die energetische Nutzung von Biomasse umfasst eine Vielzahl von unterschiedlichen und alternativen Pfaden zur Endenergiebereitstellung. Feste, flüssige und gasförmige Bioenergieträger können über thermische, thermo-chemische, physikalisch-chemische und biologisch-chemische Konversionsverfahren alternativ in Wärme, Strom und Kraftstoffe überführt werden. Dabei stehen der Möglichkeit durch die Biomassenutzung einen Beitrag zur Minderung von Treibhausgasemissionen (THG-Emissionen) und zur Substitution fossiler Energieträger zu leisten, erhöhte Kosten im Vergleich zu den konventionellen Bereitstellungsverfahren gegenüber. Zudem gilt im Hinblick auf einen Ausbau der Bioenergie zu berücksichtigen, dass trotz des regenerativen Charakters der Biomasse als erneuerbare Energiequelle, die Biomasse- und Flächenpotenziale in Deutschland begrenzt sind. Ziel dieser Arbeit ist daher die Analyse und Bewertung unterschiedlicher energetischer Nutzungspfade von Biomasse unter technischen, ökonomischen und ökologischen Gesichtspunkten vor dem Hintergrund energie- und umweltpolitischer Zielsetzungen einerseits und der Biomassepotenziale in Deutschland andererseits. Dafür wurden für eine Auswahl an heute und zukünftig wichtigen Prozessketten der Energieträgerproduktion und -nutzung sowohl Energie- und Stoffstrombilanzen erstellt als auch die Kosten der Energiegestehung berechnet. Anhand der unterschiedlichen daraus ableitbaren technischen, ökonomischen und ökologischen Aspekte erfolgt eine umfassende Bewertung der Nutzungspfade. Im Hinblick auf die Konkurrenz zu anderen erneuerbaren und den konventionellen Verfahren der Energiebereitstellung im Energiesystem Deutschland wurden die Nutzungsoptionen für Biomasse anhand einer modellgestützten Szenarioanalyse zudem systemisch bewertet. Durch die Analyse und Bewertung konnten vorteilhafte Nutzungspfade für die Endenergiebereitstellung aus Biomasse im Hinblick auf eine effiziente Biomassenutzung und eine kostengünstige Minderung der Treibhausgasemissionen identifiziert werden. Es zeigt sich, dass die Wärmebereitstellung im Hinblick auf die Gesamtheit der hier untersuchten Aspekte die vorteilhafteste Nutzungsoption darstellt. Sie ist aufgrund der höheren Effizienz bei der Biomasseumwandlung sowohl der KWK-Nutzung von Festbrennstoffen als auch der Bereitstellung gasförmiger Kraftstoffe vorzuziehen. Demgegenüber erweisen sich sowohl die Bereitstellung von Biokraftstoffen der 1. Generation, wie z. B. Biodiesel aus Raps und Ethanol aus Zuckerrüben, als auch die Nutzung von Biogas mit geringen Wärmenutzungsgraden als vergleichsweise wenig vorteilhaft. Es zeigt sich deutlich, dass der Effizienz der Biomassebereitstellung und -konversion vor den hier erarbeiteten Ergebnissen eine besondere Aufmerksamkeit bei der zukünftigen Bioenergienutzung in Deutschland zukommen sollte, da diese nicht nur einen bedeutenden Einfluss auf die Gesamteffizienz der Nutzungspfade sondern auch auf andere Aspekte, wie z. B. die spezifischen Emissionen und das Substitutionspotenzial für fossile Energieträger aufweist. Zudem wird klar, dass insbesondere bei den Biokraftstoffen der 1. Generation eine verstärkte energetische Nutzung der Koppelprodukte zur Verbesserung der Energiebilanz erfolgen sollte. Ohne die Koppelproduktnutzung erweisen sich die Gesamteffizienzen dieser Prozessketten als vergleichsweise wenig vorteilhaft. Die hier erarbeiteten Ergebnisse zeigen überdies, dass durch die Nutzung heimischer Biomasse- und Flächenpotenziale ein nennenswerter und vergleichsweise kostengünstiger Beitrag zur Minderung der energiebedingten THG-Emissionen und zur Substitution fossiler Energieträger im Energiesystem Deutschland geleistet werden kann. Rund 1.097 PJ/a an Endenergie in Form von Wärme, Strom und Kraftstoff können bei einer konsequenten Verfolgung der Klimaschutzziele bis zum Jahr 2030 durch Biomasse bereitgestellt werden. Damit kann in Deutschland im Jahr 2030 ein Anteil der heimischen Biomasse am Primärenergieverbrauch von rund 14,0 % und ein Anteil der Bioenergie am Endenergieverbrauch von 11,1 % erreicht werden. The energetic utilization of biomass comprises many different and alternative pathways for the provision of different kinds of end energy. Solid, liquid and gaseous bioenergy carriers can be transferred to heat, power and transport fuels via thermal, thermo-chemical, physio-chemical and bio-chemical conversion technologies. The preferable characteristics of biomass utilization, such as the possibility to reduce greenhouse gas (GHG) emissions and the substitution of fossil fuels, compete against the relatively high costs compared to conventional energy provision technologies. Additionally, the potentials of biomass and agricultural area for energy crop production in Germany are limited. The aim of this study is therefore the analysis and assessment of different energetic utilization pathways of biomass under technical, economic and ecological aspects against the background of energy and environment policy goals on the one hand and the limited biomass potential on the other hand. For a sample of current and prospective important process chains of the production and utilization of bioenergy carriers the energy and mass flows were balanced. In addition the energy provision costs were calculated. The following step was the integration of the different technical, economic and ecological aspects against the background of a comprehensive assessment. With regard to the competition to other renewable energies and to the conventional methods of energy supply in the energy system of Germany the utilization options were systematically assessed by means of a model based approach. Due to the analysis and assessment favourable utilization pathways for the energy provision from biomass could be identified. The results show, that the heat provision has to be evaluated as the most favourable utilization option under technical, economical and ecological aspects. Due to higher efficiencies of the biomass conversion the heat provision is more preferable than the CHP use of solid biomass as well as the provision of gaseous fuels. In contrast to that, the provision of 1st generation bio fuels, e. g. biodiesel from rapeseed and ethanol from sugar beet as well as the utilization of biogas with low heat use, has to be assessed rather less favourable. Given the presented results, the efficiency of the biomass production and conversion should play a major role in the future configuration of bioenergy in the energy system of Germany due to the high influence on the overall efficiency of the process chains and other aspects like the specific emissions and the substitution of fossil fuels. Like the efficiency the energetic utilization of by products, especially in the case of the production of 1st generation biofuels should be enhanced to improve the energy balance of these pathways. The results affirm that the utilization of national biomass and land area potentials can contribute considerably and relatively cost efficient to the reduction of GHG emissions and the substitution of fossil energy carriers. About 1,097 PJ per year in form of heat, power and transport fuels can be provided when the optimistic GHG reduction targets till 2030 will be met. In this case the national biomass shows a share of 14.0 % of primary energy demand and 11.1 % of end energy consumption.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18419/opus-1816&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 10 citations 10 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18419/opus-1816&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 03 Sep 2009 ItalyPublisher:Universität Stuttgart Authors: König, Andreas;doi: 10.18419/opus-1816
Die energetische Nutzung von Biomasse umfasst eine Vielzahl von unterschiedlichen und alternativen Pfaden zur Endenergiebereitstellung. Feste, flüssige und gasförmige Bioenergieträger können über thermische, thermo-chemische, physikalisch-chemische und biologisch-chemische Konversionsverfahren alternativ in Wärme, Strom und Kraftstoffe überführt werden. Dabei stehen der Möglichkeit durch die Biomassenutzung einen Beitrag zur Minderung von Treibhausgasemissionen (THG-Emissionen) und zur Substitution fossiler Energieträger zu leisten, erhöhte Kosten im Vergleich zu den konventionellen Bereitstellungsverfahren gegenüber. Zudem gilt im Hinblick auf einen Ausbau der Bioenergie zu berücksichtigen, dass trotz des regenerativen Charakters der Biomasse als erneuerbare Energiequelle, die Biomasse- und Flächenpotenziale in Deutschland begrenzt sind. Ziel dieser Arbeit ist daher die Analyse und Bewertung unterschiedlicher energetischer Nutzungspfade von Biomasse unter technischen, ökonomischen und ökologischen Gesichtspunkten vor dem Hintergrund energie- und umweltpolitischer Zielsetzungen einerseits und der Biomassepotenziale in Deutschland andererseits. Dafür wurden für eine Auswahl an heute und zukünftig wichtigen Prozessketten der Energieträgerproduktion und -nutzung sowohl Energie- und Stoffstrombilanzen erstellt als auch die Kosten der Energiegestehung berechnet. Anhand der unterschiedlichen daraus ableitbaren technischen, ökonomischen und ökologischen Aspekte erfolgt eine umfassende Bewertung der Nutzungspfade. Im Hinblick auf die Konkurrenz zu anderen erneuerbaren und den konventionellen Verfahren der Energiebereitstellung im Energiesystem Deutschland wurden die Nutzungsoptionen für Biomasse anhand einer modellgestützten Szenarioanalyse zudem systemisch bewertet. Durch die Analyse und Bewertung konnten vorteilhafte Nutzungspfade für die Endenergiebereitstellung aus Biomasse im Hinblick auf eine effiziente Biomassenutzung und eine kostengünstige Minderung der Treibhausgasemissionen identifiziert werden. Es zeigt sich, dass die Wärmebereitstellung im Hinblick auf die Gesamtheit der hier untersuchten Aspekte die vorteilhafteste Nutzungsoption darstellt. Sie ist aufgrund der höheren Effizienz bei der Biomasseumwandlung sowohl der KWK-Nutzung von Festbrennstoffen als auch der Bereitstellung gasförmiger Kraftstoffe vorzuziehen. Demgegenüber erweisen sich sowohl die Bereitstellung von Biokraftstoffen der 1. Generation, wie z. B. Biodiesel aus Raps und Ethanol aus Zuckerrüben, als auch die Nutzung von Biogas mit geringen Wärmenutzungsgraden als vergleichsweise wenig vorteilhaft. Es zeigt sich deutlich, dass der Effizienz der Biomassebereitstellung und -konversion vor den hier erarbeiteten Ergebnissen eine besondere Aufmerksamkeit bei der zukünftigen Bioenergienutzung in Deutschland zukommen sollte, da diese nicht nur einen bedeutenden Einfluss auf die Gesamteffizienz der Nutzungspfade sondern auch auf andere Aspekte, wie z. B. die spezifischen Emissionen und das Substitutionspotenzial für fossile Energieträger aufweist. Zudem wird klar, dass insbesondere bei den Biokraftstoffen der 1. Generation eine verstärkte energetische Nutzung der Koppelprodukte zur Verbesserung der Energiebilanz erfolgen sollte. Ohne die Koppelproduktnutzung erweisen sich die Gesamteffizienzen dieser Prozessketten als vergleichsweise wenig vorteilhaft. Die hier erarbeiteten Ergebnisse zeigen überdies, dass durch die Nutzung heimischer Biomasse- und Flächenpotenziale ein nennenswerter und vergleichsweise kostengünstiger Beitrag zur Minderung der energiebedingten THG-Emissionen und zur Substitution fossiler Energieträger im Energiesystem Deutschland geleistet werden kann. Rund 1.097 PJ/a an Endenergie in Form von Wärme, Strom und Kraftstoff können bei einer konsequenten Verfolgung der Klimaschutzziele bis zum Jahr 2030 durch Biomasse bereitgestellt werden. Damit kann in Deutschland im Jahr 2030 ein Anteil der heimischen Biomasse am Primärenergieverbrauch von rund 14,0 % und ein Anteil der Bioenergie am Endenergieverbrauch von 11,1 % erreicht werden. The energetic utilization of biomass comprises many different and alternative pathways for the provision of different kinds of end energy. Solid, liquid and gaseous bioenergy carriers can be transferred to heat, power and transport fuels via thermal, thermo-chemical, physio-chemical and bio-chemical conversion technologies. The preferable characteristics of biomass utilization, such as the possibility to reduce greenhouse gas (GHG) emissions and the substitution of fossil fuels, compete against the relatively high costs compared to conventional energy provision technologies. Additionally, the potentials of biomass and agricultural area for energy crop production in Germany are limited. The aim of this study is therefore the analysis and assessment of different energetic utilization pathways of biomass under technical, economic and ecological aspects against the background of energy and environment policy goals on the one hand and the limited biomass potential on the other hand. For a sample of current and prospective important process chains of the production and utilization of bioenergy carriers the energy and mass flows were balanced. In addition the energy provision costs were calculated. The following step was the integration of the different technical, economic and ecological aspects against the background of a comprehensive assessment. With regard to the competition to other renewable energies and to the conventional methods of energy supply in the energy system of Germany the utilization options were systematically assessed by means of a model based approach. Due to the analysis and assessment favourable utilization pathways for the energy provision from biomass could be identified. The results show, that the heat provision has to be evaluated as the most favourable utilization option under technical, economical and ecological aspects. Due to higher efficiencies of the biomass conversion the heat provision is more preferable than the CHP use of solid biomass as well as the provision of gaseous fuels. In contrast to that, the provision of 1st generation bio fuels, e. g. biodiesel from rapeseed and ethanol from sugar beet as well as the utilization of biogas with low heat use, has to be assessed rather less favourable. Given the presented results, the efficiency of the biomass production and conversion should play a major role in the future configuration of bioenergy in the energy system of Germany due to the high influence on the overall efficiency of the process chains and other aspects like the specific emissions and the substitution of fossil fuels. Like the efficiency the energetic utilization of by products, especially in the case of the production of 1st generation biofuels should be enhanced to improve the energy balance of these pathways. The results affirm that the utilization of national biomass and land area potentials can contribute considerably and relatively cost efficient to the reduction of GHG emissions and the substitution of fossil energy carriers. About 1,097 PJ per year in form of heat, power and transport fuels can be provided when the optimistic GHG reduction targets till 2030 will be met. In this case the national biomass shows a share of 14.0 % of primary energy demand and 11.1 % of end energy consumption.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18419/opus-1816&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 10 citations 10 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2012 Germany Funded by:EC | ECOMOVEEC| ECOMOVEHöltl, Arne; Schießl, Caroline; Fricke, Nicola; Hoek, Roederick; Laborda, Josep; Bernatallada, Guillem;The Validation and Evaluation sub-project of the eCoMove project groups a number of complementary activities including the core tasks to validate the functionality of the eCoMove system and applications, and to evaluate if the aimed reduction of 20% overall energy consumption can be achieved. Besides technical requirements a validation process also has to consider non-technical requirements of potential users of the eCoMove system which were in the focus of research for this deliverable.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2012 Germany Funded by:EC | ECOMOVEEC| ECOMOVEHöltl, Arne; Schießl, Caroline; Fricke, Nicola; Hoek, Roederick; Laborda, Josep; Bernatallada, Guillem;The Validation and Evaluation sub-project of the eCoMove project groups a number of complementary activities including the core tasks to validate the functionality of the eCoMove system and applications, and to evaluate if the aimed reduction of 20% overall energy consumption can be achieved. Besides technical requirements a validation process also has to consider non-technical requirements of potential users of the eCoMove system which were in the focus of research for this deliverable.
DLR publication serv... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2019Publisher:TU Wien Authors: Steinmetz, Lisa-Anna;Der Klimawandel und die damit einhergehenden negativen Auswirkungen stellen eine zentrale Herausforderung f��r St��dte, wie beispielsweise Wien dar. Der urbane Raum wird in Zukunft durch seine dichte Bebauung und den hohen Versiegelungsgrad ��berdurchschnittlich stark von den Folgen der Klimaerw��rmung betroffen sein. Um dem Klimawandel entgegenzuwirken oder ihn gar aufzuhalten, wurden auf internationaler, europ��ischer, nationaler und lokaler Ebene bereits zahlreiche rechtliche Regelungen umgesetzt, um einerseits die CO2-Emissionen zu reduzieren beziehungsweise einzuschr��nken und andererseits der Anpassung an den Klimawandel Folge zu leisten. Die Rechtsmaterie reicht hierbei von v��lkerrechtlichen Vertr��gen, Verordnungen ��ber Gesetze bis hin zu einfachen Normen. Ein Hauptverursacher der CO2-Emissionen in Wien stellt, neben den Sektoren ���Verkehr��� und ���Energie���, der Geb��udesektor dar. Neben der CO2-Reduktion kann im Bereich der Geb��ude ebenfalls ma��geblich zur Klimawandelanpassung beigetragen werden. In der Bundeshauptstadt Wien werden bereits Ma��nahmen auf der Geb��udeebene umgesetzt, um sowohl den Klimaschutz als auch die Klimawandelanpassung voranzutreiben. Die Ma��nahmen gliedern sich hierbei in Begr��nung, thermisch-energetische Sanierung, energieeffiziente Geb��ude und Geb��udek��hlung. Alle Ma��nahmen f��hren zu einer Verbesserung des Innenraumklimas und einer CO2- Reduktion, wobei das Ausma�� der Minderung je nach umgesetzter Ma��nahme variiert. Weiters ist durch Ma��nahmen, wie beispielsweise die Fassadenbegr��nung, auch eine Abk��hlung des Mikroklimas in der unmittelbaren Umgebung m��glich. Climate change and the associated negative impacts represent a central challenge for cities such as Vienna. In the future, urban areas will be affected to an above-average extent by the consequences of global warming due to their building desnity and high degree of land sealing. In order to counteract, or even stop climate change, numerous legal regulations have already been implemented at international, european, national and regional level in order to reduce or restrict CO2-emissions on the one hand and to adapt to climate change on the other. The legal material ranges from international treaties, ordinances and laws to simple norms. Besides the sectors "transport" and "energy", the building sector is one of the main sources of CO2-emissions in Vienna. In addition to CO2 reduction, buildings can significantly contribute to climate change adaptation. In the federal capital Vienna, measures are already being implemented in the building sector to promote both climate protection and climate change adaptation. The measures are divided into greening, thermalenergetic renovation, energy-efficient buildings and passive cooling of buildings. All measures lead to an improvement of the indoor climate and a reduction of CO2, whereby the extent of the reduction varies depending on the implemented measure. In addition, measures such as the greening of facades also make it possible to cool the microclimate in the immediate vicinity.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2019Publisher:TU Wien Authors: Steinmetz, Lisa-Anna;Der Klimawandel und die damit einhergehenden negativen Auswirkungen stellen eine zentrale Herausforderung f��r St��dte, wie beispielsweise Wien dar. Der urbane Raum wird in Zukunft durch seine dichte Bebauung und den hohen Versiegelungsgrad ��berdurchschnittlich stark von den Folgen der Klimaerw��rmung betroffen sein. Um dem Klimawandel entgegenzuwirken oder ihn gar aufzuhalten, wurden auf internationaler, europ��ischer, nationaler und lokaler Ebene bereits zahlreiche rechtliche Regelungen umgesetzt, um einerseits die CO2-Emissionen zu reduzieren beziehungsweise einzuschr��nken und andererseits der Anpassung an den Klimawandel Folge zu leisten. Die Rechtsmaterie reicht hierbei von v��lkerrechtlichen Vertr��gen, Verordnungen ��ber Gesetze bis hin zu einfachen Normen. Ein Hauptverursacher der CO2-Emissionen in Wien stellt, neben den Sektoren ���Verkehr��� und ���Energie���, der Geb��udesektor dar. Neben der CO2-Reduktion kann im Bereich der Geb��ude ebenfalls ma��geblich zur Klimawandelanpassung beigetragen werden. In der Bundeshauptstadt Wien werden bereits Ma��nahmen auf der Geb��udeebene umgesetzt, um sowohl den Klimaschutz als auch die Klimawandelanpassung voranzutreiben. Die Ma��nahmen gliedern sich hierbei in Begr��nung, thermisch-energetische Sanierung, energieeffiziente Geb��ude und Geb��udek��hlung. Alle Ma��nahmen f��hren zu einer Verbesserung des Innenraumklimas und einer CO2- Reduktion, wobei das Ausma�� der Minderung je nach umgesetzter Ma��nahme variiert. Weiters ist durch Ma��nahmen, wie beispielsweise die Fassadenbegr��nung, auch eine Abk��hlung des Mikroklimas in der unmittelbaren Umgebung m��glich. Climate change and the associated negative impacts represent a central challenge for cities such as Vienna. In the future, urban areas will be affected to an above-average extent by the consequences of global warming due to their building desnity and high degree of land sealing. In order to counteract, or even stop climate change, numerous legal regulations have already been implemented at international, european, national and regional level in order to reduce or restrict CO2-emissions on the one hand and to adapt to climate change on the other. The legal material ranges from international treaties, ordinances and laws to simple norms. Besides the sectors "transport" and "energy", the building sector is one of the main sources of CO2-emissions in Vienna. In addition to CO2 reduction, buildings can significantly contribute to climate change adaptation. In the federal capital Vienna, measures are already being implemented in the building sector to promote both climate protection and climate change adaptation. The measures are divided into greening, thermalenergetic renovation, energy-efficient buildings and passive cooling of buildings. All measures lead to an improvement of the indoor climate and a reduction of CO2, whereby the extent of the reduction varies depending on the implemented measure. In addition, measures such as the greening of facades also make it possible to cool the microclimate in the immediate vicinity.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2017 GermanyAuthors: Rautmann, Christof;This thesis deals with the acoustic simulation of wind turbine noise. Turbulent boundary layer trailing-edge interaction noise is the main noise source for modern wind turbines. A hybrid approach was used to simulate this phenomenon on a two-demensional airfoil level. In a first step a numerical flow simulation (CFD) is conducted. It yields aerodynamic coefficients as well as the flow field around the airfoil and turbulence statistics from the used turbulence model. In a second step these turbulence statistics are used to reconstruct a time and space resolved turbulence field by utilizing the stochastic reconstruction method FRPM. Together with the underlying mean flow, the turbulent sound sources are used in a subsequent computational aeroacoustic (CAA) simulation. The result is the sound pressure field around the airfoil. The method was validated using experimental results from wind tunnel tests. It shows better accuracy than semi-emperical approaches and is much faster than scale resolving methods. Throughout geometry variations it was shown that airfoils with the same aerodynamic performance could have totally different overall sound emissions in a range of up to 4dB. Relations between parameters from the suction side boundary layer and the noise spectrum were shown. Guidelines for the design of low-noise airfoils were derived. To evaluate the noise levels for a whole wind turbine, a strategy was developed to simulate the overall noise by a summation of independent airfoil sections. Time and space resolved noise maps were calculated for arbitrary observer positions around the wind turbine. Noise reductions up to 2 dB were possible without drawbacks on turbine performance or loads. The presented method can be used in the early stages of future wind turbine design.
DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2017 GermanyAuthors: Rautmann, Christof;This thesis deals with the acoustic simulation of wind turbine noise. Turbulent boundary layer trailing-edge interaction noise is the main noise source for modern wind turbines. A hybrid approach was used to simulate this phenomenon on a two-demensional airfoil level. In a first step a numerical flow simulation (CFD) is conducted. It yields aerodynamic coefficients as well as the flow field around the airfoil and turbulence statistics from the used turbulence model. In a second step these turbulence statistics are used to reconstruct a time and space resolved turbulence field by utilizing the stochastic reconstruction method FRPM. Together with the underlying mean flow, the turbulent sound sources are used in a subsequent computational aeroacoustic (CAA) simulation. The result is the sound pressure field around the airfoil. The method was validated using experimental results from wind tunnel tests. It shows better accuracy than semi-emperical approaches and is much faster than scale resolving methods. Throughout geometry variations it was shown that airfoils with the same aerodynamic performance could have totally different overall sound emissions in a range of up to 4dB. Relations between parameters from the suction side boundary layer and the noise spectrum were shown. Guidelines for the design of low-noise airfoils were derived. To evaluate the noise levels for a whole wind turbine, a strategy was developed to simulate the overall noise by a summation of independent airfoil sections. Time and space resolved noise maps were calculated for arbitrary observer positions around the wind turbine. Noise reductions up to 2 dB were possible without drawbacks on turbine performance or loads. The presented method can be used in the early stages of future wind turbine design.
DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1640::8709e1933077b2f14cd7935af161aa6e&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2010 GermanyAuthors: Kihm, Alexander; Trommer, Stefan; Hebes, Paul; Mehlin, Markus;The paper investigates an economic market potential for Plug-in Hybrid- and Battery Electric vehicles considering different categories of customers in Germany from 2015 to 2030. A multi-step methodology using constraints on the current vehicle registrations and inventory is developed to derive a general framework potential and a concrete economic potential for the different vehicles and ownership models under adjustable technical and legislative aspects.
DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2010 GermanyAuthors: Kihm, Alexander; Trommer, Stefan; Hebes, Paul; Mehlin, Markus;The paper investigates an economic market potential for Plug-in Hybrid- and Battery Electric vehicles considering different categories of customers in Germany from 2015 to 2030. A multi-step methodology using constraints on the current vehicle registrations and inventory is developed to derive a general framework potential and a concrete economic potential for the different vehicles and ownership models under adjustable technical and legislative aspects.
DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1640::503b0a77c5e3b67b43a4558bf9379387&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2013Embargo end date: 31 Oct 2013 ItalyPublisher:Universität Stuttgart Authors: Sun, Ninghong;doi: 10.18419/opus-2159
Durch die Veröffentlichung des Energiekonzeptes im September 2010 hat die deutsche Bundesregierung den Weg in das Zeitalter der erneuerbaren Energien beschrieben. Demnach wird ein großer Teil des zukünftigen Elektrizitätsversorgungssystems in Deutschland aus Wind- und Solarenergie bestehen, deren Einspeisung durch das fluktuierende natürliche Dargebot bedingt ist. Der wachsende Anteil dieser fluktuierenden Einspeisung stellt eine große Herausforderung sowohl für die kurzfristige Kraftwerkseinsatzplanung als auch für die langfristigen Investitionsentscheidungen dar. In der vorliegenden Arbeit wird ein fundamentales Elektrizitätsmarktmodell mit einer detaillierten Abbildung von den beiden Aspekten entwickelt. Mit Hilfe dieses Modells wird analysiert, mit welchen notwendigen Kraftwerkszubauten die Versorgungszuverlässigkeit bei einem hohen Anteil von fluktuierender Einspeisung in der Zukunft kostengünstig gewährleistet werden kann. Des Weiteren wird eine ausführliche Analyse der aktuellen Energiepolitik in Deutschland bezüglich der Nutzung von erneuerbaren Energien und der Kernenergie durchgeführt. The German Federal Government published its energy concept in September 2010 with a description of the road into the era of renewable energies. Therefore, the future renewable energy installed in Germany is expected to consist mostly of wind and solar, which are subject to intermittency of supply and significant fluctuations. The growing portion of energy generation by fluctuating sources is turning to a big challenge for the power plant unit commitment and the investment decisions as well. In this thesis, a fundamental electricity market model with combined modeling of these two aspects is developed. This model is subsequently applied to the German electricity market to investigate what kind of power plant investments are indispensable, considering the steadily increasing portion of energy generation from fluctuating sources, to ensure a reliable energy supply in a cost-effective way in the future. In addition, current energy policy in Germany regarding the use of renewable energy and nuclear energy is analyzed.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen 4 citations 4 popularity Top 10% influence Average impulse Average Powered by BIP!
more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2013Embargo end date: 31 Oct 2013 ItalyPublisher:Universität Stuttgart Authors: Sun, Ninghong;doi: 10.18419/opus-2159
Durch die Veröffentlichung des Energiekonzeptes im September 2010 hat die deutsche Bundesregierung den Weg in das Zeitalter der erneuerbaren Energien beschrieben. Demnach wird ein großer Teil des zukünftigen Elektrizitätsversorgungssystems in Deutschland aus Wind- und Solarenergie bestehen, deren Einspeisung durch das fluktuierende natürliche Dargebot bedingt ist. Der wachsende Anteil dieser fluktuierenden Einspeisung stellt eine große Herausforderung sowohl für die kurzfristige Kraftwerkseinsatzplanung als auch für die langfristigen Investitionsentscheidungen dar. In der vorliegenden Arbeit wird ein fundamentales Elektrizitätsmarktmodell mit einer detaillierten Abbildung von den beiden Aspekten entwickelt. Mit Hilfe dieses Modells wird analysiert, mit welchen notwendigen Kraftwerkszubauten die Versorgungszuverlässigkeit bei einem hohen Anteil von fluktuierender Einspeisung in der Zukunft kostengünstig gewährleistet werden kann. Des Weiteren wird eine ausführliche Analyse der aktuellen Energiepolitik in Deutschland bezüglich der Nutzung von erneuerbaren Energien und der Kernenergie durchgeführt. The German Federal Government published its energy concept in September 2010 with a description of the road into the era of renewable energies. Therefore, the future renewable energy installed in Germany is expected to consist mostly of wind and solar, which are subject to intermittency of supply and significant fluctuations. The growing portion of energy generation by fluctuating sources is turning to a big challenge for the power plant unit commitment and the investment decisions as well. In this thesis, a fundamental electricity market model with combined modeling of these two aspects is developed. This model is subsequently applied to the German electricity market to investigate what kind of power plant investments are indispensable, considering the steadily increasing portion of energy generation from fluctuating sources, to ensure a reliable energy supply in a cost-effective way in the future. In addition, current energy policy in Germany regarding the use of renewable energy and nuclear energy is analyzed.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2019 AustriaAuthors: Oberhummer, Anton;Diese Masterarbeit gibt einen Überblick über Technologien und Lösungen, welche derzeit zur Verfügung stehen, um dem steigenden Bedarf an Gebäudekühlung nachhaltig zu begegnen. Raumklimatisierung trägt zunehmend und wesentlich zum globalen Energiebedarf bei und auch der weltweite Absatz von Raumklimageräten steigt signifikant. Wie stark dieser kältetechnische Energiebedarf wächst, hängt einerseits von den politischen Maßnahmen zur Förderung nachhaltiger Systeme ab und andererseits von der Akzeptanz durch die NutzerInnen, PlanerInnen oder den Bauherren ab. Die derzeit bestehenden und auch geplanten Maßnahmen tragen jedoch nur sehr begrenzt dazu bei, dieses Wachstum nachhaltig zu bremsen. Die Entwicklung einer multikriteriellen Analysestruktur für resilientes Kühlen in Form von technologieübergreifenden Datenblättern soll ArchitektInnen, PlanerInnen und Bauherren bei der Auswahl eines für ihre Anforderungen geeigneten Kühlsystems unterstützen. Die erstellten Datenblätter stellen zum einen die technischen Daten und Leistungsgrenzen der jeweiligen Technologie übersichtlich dar und zum anderen auch deren ökologischen, ökonomischen und soziokulturellen Auswirkungen. Sämtliche Datenblätter, welche im Rahmen dieser Arbeit entwickelt und anschließend befüllt wurden sind in einer Datenblattsammlung im Anhang dieser Arbeit abgelegt. This master thesis gives an overview of technologies and solutions that are currently available to meet the increasing demand for building cooling in a sustainable way. Room air conditioning is making an increasing and significant contribution to global energy demand, and worldwide sales of room air conditioners are also rising significantly. The growing of energy needs for cooling depends on the one hand, on the political measures taken to promote sustainable systems and, on the other hand, on the level of acceptance by users, planners or building owners. However, the existing and planned measures are only making a very limited contribution to slowing this growth in the long term. The development of a multi-criteria analysis structure for resilient cooling in the form of cross-technology data sheets should support architects, planners and building owners in selecting a cooling system suitable for their requirements. The data sheets provide a clear overview of the technical data and performance limits of the respective technology on the one hand and their ecological, economic and socio-cultural effects on the other. All data sheets, which were developed and subsequently filled in within the scope of this work, are stored in a data sheet collection in the appendix of this work. vorgelegt von: Anton Oberhummer Wien, FH Campus Wien, Masterarb., 2019
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2019 AustriaAuthors: Oberhummer, Anton;Diese Masterarbeit gibt einen Überblick über Technologien und Lösungen, welche derzeit zur Verfügung stehen, um dem steigenden Bedarf an Gebäudekühlung nachhaltig zu begegnen. Raumklimatisierung trägt zunehmend und wesentlich zum globalen Energiebedarf bei und auch der weltweite Absatz von Raumklimageräten steigt signifikant. Wie stark dieser kältetechnische Energiebedarf wächst, hängt einerseits von den politischen Maßnahmen zur Förderung nachhaltiger Systeme ab und andererseits von der Akzeptanz durch die NutzerInnen, PlanerInnen oder den Bauherren ab. Die derzeit bestehenden und auch geplanten Maßnahmen tragen jedoch nur sehr begrenzt dazu bei, dieses Wachstum nachhaltig zu bremsen. Die Entwicklung einer multikriteriellen Analysestruktur für resilientes Kühlen in Form von technologieübergreifenden Datenblättern soll ArchitektInnen, PlanerInnen und Bauherren bei der Auswahl eines für ihre Anforderungen geeigneten Kühlsystems unterstützen. Die erstellten Datenblätter stellen zum einen die technischen Daten und Leistungsgrenzen der jeweiligen Technologie übersichtlich dar und zum anderen auch deren ökologischen, ökonomischen und soziokulturellen Auswirkungen. Sämtliche Datenblätter, welche im Rahmen dieser Arbeit entwickelt und anschließend befüllt wurden sind in einer Datenblattsammlung im Anhang dieser Arbeit abgelegt. This master thesis gives an overview of technologies and solutions that are currently available to meet the increasing demand for building cooling in a sustainable way. Room air conditioning is making an increasing and significant contribution to global energy demand, and worldwide sales of room air conditioners are also rising significantly. The growing of energy needs for cooling depends on the one hand, on the political measures taken to promote sustainable systems and, on the other hand, on the level of acceptance by users, planners or building owners. However, the existing and planned measures are only making a very limited contribution to slowing this growth in the long term. The development of a multi-criteria analysis structure for resilient cooling in the form of cross-technology data sheets should support architects, planners and building owners in selecting a cooling system suitable for their requirements. The data sheets provide a clear overview of the technical data and performance limits of the respective technology on the one hand and their ecological, economic and socio-cultural effects on the other. All data sheets, which were developed and subsequently filled in within the scope of this work, are stored in a data sheet collection in the appendix of this work. vorgelegt von: Anton Oberhummer Wien, FH Campus Wien, Masterarb., 2019
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2022Embargo end date: 10 Jul 2023Publisher:Universitätsbibliothek Siegen Authors: Stobernack, Niklas;Die vorliegende Arbeit wurde im Rahmen eines Forschungsprojektes metabolon IIb (EFRE-0500033) erstellt. Im Sinne der Kreislaufwirtschaft war das Schließen großer Energie- und Stoffkreisläufe Gegenstand einer Vielzahl von Teilprojekten. Ziel war es, aus biogenen sowie abfallstämmigen Reststoffen entweder regenerative Energie zu gewinnen oder werthaltige Materialien in den anthropogenen Stoffkreislauf zurückzuführen. Die vorliegende Arbeit enstand bei der Bearbeitung der Fragestellung bezüglich der Bedeutung der hydrothermalen Karbonisierung (HTC) im Hinblick auf die zukünftige regenerative Energiebereitstellung. Das übergeordnete Ziel der Arbeit bestand darin, den HTC-Prozess in ganzheitliche Prozessketten zu integrieren und diese im Hinblick auf die energetische Verwertung unter Berücksichtigung der Treibhausgasemissionen (GWP) zu bewerten. Da es nur wenige HTC-Anlagen im industriellen Maßstab gibt und keine standardisierten Modellvorstellungen zur Abbildung des Prozesses existieren, wurde ein tragfähiges Reaktormodell auf Basis eines empirischen kinetischen Ansatzes für die HTC entwickelt. Das Reaktormodell wurde genutzt, um die Massen- und Energieverteilung auf die drei Produktphasen (fest, flüssig und gasförmig) zu berechnen und mit entsprechenden experimentellen Untersuchungen zu evaluieren. Ein potentielles Einsatzgebiet bietet die HTC von häuslichem Bioabfall und dessen Gärresten, die als Eingangsstoff in der Arbeit verwendet wurden. Die Prozessketten wurden im Anschluss anhand von Prozesswirkungsgraden beurteilt und mit konventionellen Prozessketten verglichen. Als konventionelle Prozessketten wurden die Verbrennung des Bioabfalls in einer Müllverbrennungsanlage („I“) und dessen Vergärung mit anschließender Kompostierung („AD+comp“) untersucht. Dabei wurden exergetische Nettowirkungsgrade von 13,7% für „I“ und 12,1% für „AD+comp“ erzielt. Durch die Integration einer HTC konnte der exergetische Wirkungsgrad im Vergleich zu der Verbrennung in einer Müllverbrennungsanlage um 70% und im Vergleich zu der konventionellen Vergärung um 93% gesteigert werden. Zusätzlich wurden mit Hilfe der Datensätze aus dem Gesamtmodell das GWP ermittelt. Das GWP lag in den Referenzfällen bei ∼500gCO2,Eq kW−1 h−1. Durch die Integration der HTC-Einheit konnten das GWP um bis zu 30% im Vergleich zu den konventionellen Behandlungspfaden reduziert werden. The thesis presented here was produced as part of a research project metabolon IIb (EFRE-0500033). In terms of the circular economy, the focus was on closing energy cycles and material circulations. The goal was either to generate regenerative energy or to return valuable materials back to the anthropogenic material cycle, with the focus on biogenic or waste residues as input material. The thesis arose while dealing with the question of the importance of hydrothermal carbonization (HTC) regarding future regenerative energy supply. The overall goal of the thesis was then to integrate the HTC process into holistic process chains and to evaluate its energetic use considering the global warming potential (GWP). Due to the lack of HTC plants on an industrial scale and standardized model implementations, a feasible reactor model based on an empirical kinetic approach for HTC was developed. The model was used to calculate the mass and energy distribution in the three production phases (solid, liquid, and gaseous) and evaluated with experimental analyses. The HTC offers a potential application from the organic fraction of municipal solid waste (OFMSW) and its digestate, which were used as feedstock. In addition, the process chains were assessed based on their efficiencies and compared with conventional process chains. The representative conventional process chains in this case were the incineration of OFMSW in a waste incineration plant (“I“) and the treatment in an anaerobe digestion plant followed by composting (“AD+comp“). Here, the exergetic net efficiency was 13,7% for “I“ and 12,1% for “AD+comp“. The implementation of an HTC-process increased the exergetic efficiencies by 70% compared with “I“ and by 93% compared with “AD+comp“. The GWP was ∼500gCO2,Eq kW−1 h−1 in the reference cases. The integration of an HTC unit reduced the GWP by 30% compared to the conventional pathway.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2022Embargo end date: 10 Jul 2023Publisher:Universitätsbibliothek Siegen Authors: Stobernack, Niklas;Die vorliegende Arbeit wurde im Rahmen eines Forschungsprojektes metabolon IIb (EFRE-0500033) erstellt. Im Sinne der Kreislaufwirtschaft war das Schließen großer Energie- und Stoffkreisläufe Gegenstand einer Vielzahl von Teilprojekten. Ziel war es, aus biogenen sowie abfallstämmigen Reststoffen entweder regenerative Energie zu gewinnen oder werthaltige Materialien in den anthropogenen Stoffkreislauf zurückzuführen. Die vorliegende Arbeit enstand bei der Bearbeitung der Fragestellung bezüglich der Bedeutung der hydrothermalen Karbonisierung (HTC) im Hinblick auf die zukünftige regenerative Energiebereitstellung. Das übergeordnete Ziel der Arbeit bestand darin, den HTC-Prozess in ganzheitliche Prozessketten zu integrieren und diese im Hinblick auf die energetische Verwertung unter Berücksichtigung der Treibhausgasemissionen (GWP) zu bewerten. Da es nur wenige HTC-Anlagen im industriellen Maßstab gibt und keine standardisierten Modellvorstellungen zur Abbildung des Prozesses existieren, wurde ein tragfähiges Reaktormodell auf Basis eines empirischen kinetischen Ansatzes für die HTC entwickelt. Das Reaktormodell wurde genutzt, um die Massen- und Energieverteilung auf die drei Produktphasen (fest, flüssig und gasförmig) zu berechnen und mit entsprechenden experimentellen Untersuchungen zu evaluieren. Ein potentielles Einsatzgebiet bietet die HTC von häuslichem Bioabfall und dessen Gärresten, die als Eingangsstoff in der Arbeit verwendet wurden. Die Prozessketten wurden im Anschluss anhand von Prozesswirkungsgraden beurteilt und mit konventionellen Prozessketten verglichen. Als konventionelle Prozessketten wurden die Verbrennung des Bioabfalls in einer Müllverbrennungsanlage („I“) und dessen Vergärung mit anschließender Kompostierung („AD+comp“) untersucht. Dabei wurden exergetische Nettowirkungsgrade von 13,7% für „I“ und 12,1% für „AD+comp“ erzielt. Durch die Integration einer HTC konnte der exergetische Wirkungsgrad im Vergleich zu der Verbrennung in einer Müllverbrennungsanlage um 70% und im Vergleich zu der konventionellen Vergärung um 93% gesteigert werden. Zusätzlich wurden mit Hilfe der Datensätze aus dem Gesamtmodell das GWP ermittelt. Das GWP lag in den Referenzfällen bei ∼500gCO2,Eq kW−1 h−1. Durch die Integration der HTC-Einheit konnten das GWP um bis zu 30% im Vergleich zu den konventionellen Behandlungspfaden reduziert werden. The thesis presented here was produced as part of a research project metabolon IIb (EFRE-0500033). In terms of the circular economy, the focus was on closing energy cycles and material circulations. The goal was either to generate regenerative energy or to return valuable materials back to the anthropogenic material cycle, with the focus on biogenic or waste residues as input material. The thesis arose while dealing with the question of the importance of hydrothermal carbonization (HTC) regarding future regenerative energy supply. The overall goal of the thesis was then to integrate the HTC process into holistic process chains and to evaluate its energetic use considering the global warming potential (GWP). Due to the lack of HTC plants on an industrial scale and standardized model implementations, a feasible reactor model based on an empirical kinetic approach for HTC was developed. The model was used to calculate the mass and energy distribution in the three production phases (solid, liquid, and gaseous) and evaluated with experimental analyses. The HTC offers a potential application from the organic fraction of municipal solid waste (OFMSW) and its digestate, which were used as feedstock. In addition, the process chains were assessed based on their efficiencies and compared with conventional process chains. The representative conventional process chains in this case were the incineration of OFMSW in a waste incineration plant (“I“) and the treatment in an anaerobe digestion plant followed by composting (“AD+comp“). Here, the exergetic net efficiency was 13,7% for “I“ and 12,1% for “AD+comp“. The implementation of an HTC-process increased the exergetic efficiencies by 70% compared with “I“ and by 93% compared with “AD+comp“. The GWP was ∼500gCO2,Eq kW−1 h−1 in the reference cases. The integration of an HTC unit reduced the GWP by 30% compared to the conventional pathway.
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description Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2019Embargo end date: 04 Jun 2019Publisher:Hannover : Institutionelles Repositorium der Leibniz Universität Hannover Authors: Christoph Haisch;doi: 10.15488/4937
Im Rahmen dieser Arbeit wurden solaraktive Wolframtrioxid-Photoelektroden für ein Verfahren untersucht, bei welchem mithilfe von Sonnenenergie Schadstoffe aus dem Wasser abgebaut werden und simultan Wasserstoff als Energieträger erzeugt wird. Um diese duale Nutzung des Sonnenlichts zu ermöglichen, wurden die photokatalytisch aktiven Wolframtrioxid-Elektroden auf ihre physikalischen, optischen und photoelektrochemischen Eigenschaften untersucht. In the scope of this work, solar light active tungsten trioxide photoelectrodes were tested for a process, in which solar energy is used to decompose organic pollutants in water, and simultaneously generate hydrogen as an energy carrier. To enable this dual use of sunlight, photocatalytically active tungsten trioxide electrodes were investigated for their physical, optical and photoelectrochemical properties.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2019Embargo end date: 04 Jun 2019Publisher:Hannover : Institutionelles Repositorium der Leibniz Universität Hannover Authors: Christoph Haisch;doi: 10.15488/4937
Im Rahmen dieser Arbeit wurden solaraktive Wolframtrioxid-Photoelektroden für ein Verfahren untersucht, bei welchem mithilfe von Sonnenenergie Schadstoffe aus dem Wasser abgebaut werden und simultan Wasserstoff als Energieträger erzeugt wird. Um diese duale Nutzung des Sonnenlichts zu ermöglichen, wurden die photokatalytisch aktiven Wolframtrioxid-Elektroden auf ihre physikalischen, optischen und photoelektrochemischen Eigenschaften untersucht. In the scope of this work, solar light active tungsten trioxide photoelectrodes were tested for a process, in which solar energy is used to decompose organic pollutants in water, and simultaneously generate hydrogen as an energy carrier. To enable this dual use of sunlight, photocatalytically active tungsten trioxide electrodes were investigated for their physical, optical and photoelectrochemical properties.
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For further information contact us at helpdesk@openaire.eu0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 14 Mar 2016 GermanyPublisher:Universität Ulm Authors: Köpke, Michael;doi: 10.18725/oparu-1244
Clostridium ljungdahlii was metabolically engineered for the production of bulk chemical and next generation biofuel 1-butanol from synthesis gas by transformation with a plasmid harbouring the butanol synthesis genes from Clostridium acetobutylicum. Synthesis gas (a mixture of CO, CO2 and H2) can be easily produced by gasification of biomass or municipal waste. Thus, this process presents an alternative to conventional butanol fermentation (which uses corn or sugar as substrate and therefore competes with the food industry) and also chemical butanol production (which starts from propen obtained from non-renewable sources). To optimize the process, metagenomic libraries from environmental sources were screened for novel butanol dehydrogenases. Four respective enzymes could be identified and characterized in detail. Further studies on the metabolism of C. ljungdahlii revealed a new type of energy conservation in acetogenic bacteria. There are indications that Clostridium difficile might also belong to this group, as respective genes were found in the genome sequence and weak autotrophic growth occurred on a mixture of CO2 and H2.
Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen 3 citations 3 popularity Top 10% influence Top 10% impulse Average Powered by BIP!
more_vert Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 14 Mar 2016 GermanyPublisher:Universität Ulm Authors: Köpke, Michael;doi: 10.18725/oparu-1244
Clostridium ljungdahlii was metabolically engineered for the production of bulk chemical and next generation biofuel 1-butanol from synthesis gas by transformation with a plasmid harbouring the butanol synthesis genes from Clostridium acetobutylicum. Synthesis gas (a mixture of CO, CO2 and H2) can be easily produced by gasification of biomass or municipal waste. Thus, this process presents an alternative to conventional butanol fermentation (which uses corn or sugar as substrate and therefore competes with the food industry) and also chemical butanol production (which starts from propen obtained from non-renewable sources). To optimize the process, metagenomic libraries from environmental sources were screened for novel butanol dehydrogenases. Four respective enzymes could be identified and characterized in detail. Further studies on the metabolism of C. ljungdahlii revealed a new type of energy conservation in acetogenic bacteria. There are indications that Clostridium difficile might also belong to this group, as respective genes were found in the genome sequence and weak autotrophic growth occurred on a mixture of CO2 and H2.
Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen 3 citations 3 popularity Top 10% influence Top 10% impulse Average Powered by BIP!
more_vert Open Access Reposito... arrow_drop_down Open Access Repository of Ulm UniversityDoctoral thesis . 2009Data sources: Open Access Repository of Ulm Universityadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 03 Sep 2009 ItalyPublisher:Universität Stuttgart Authors: König, Andreas;doi: 10.18419/opus-1816
Die energetische Nutzung von Biomasse umfasst eine Vielzahl von unterschiedlichen und alternativen Pfaden zur Endenergiebereitstellung. Feste, flüssige und gasförmige Bioenergieträger können über thermische, thermo-chemische, physikalisch-chemische und biologisch-chemische Konversionsverfahren alternativ in Wärme, Strom und Kraftstoffe überführt werden. Dabei stehen der Möglichkeit durch die Biomassenutzung einen Beitrag zur Minderung von Treibhausgasemissionen (THG-Emissionen) und zur Substitution fossiler Energieträger zu leisten, erhöhte Kosten im Vergleich zu den konventionellen Bereitstellungsverfahren gegenüber. Zudem gilt im Hinblick auf einen Ausbau der Bioenergie zu berücksichtigen, dass trotz des regenerativen Charakters der Biomasse als erneuerbare Energiequelle, die Biomasse- und Flächenpotenziale in Deutschland begrenzt sind. Ziel dieser Arbeit ist daher die Analyse und Bewertung unterschiedlicher energetischer Nutzungspfade von Biomasse unter technischen, ökonomischen und ökologischen Gesichtspunkten vor dem Hintergrund energie- und umweltpolitischer Zielsetzungen einerseits und der Biomassepotenziale in Deutschland andererseits. Dafür wurden für eine Auswahl an heute und zukünftig wichtigen Prozessketten der Energieträgerproduktion und -nutzung sowohl Energie- und Stoffstrombilanzen erstellt als auch die Kosten der Energiegestehung berechnet. Anhand der unterschiedlichen daraus ableitbaren technischen, ökonomischen und ökologischen Aspekte erfolgt eine umfassende Bewertung der Nutzungspfade. Im Hinblick auf die Konkurrenz zu anderen erneuerbaren und den konventionellen Verfahren der Energiebereitstellung im Energiesystem Deutschland wurden die Nutzungsoptionen für Biomasse anhand einer modellgestützten Szenarioanalyse zudem systemisch bewertet. Durch die Analyse und Bewertung konnten vorteilhafte Nutzungspfade für die Endenergiebereitstellung aus Biomasse im Hinblick auf eine effiziente Biomassenutzung und eine kostengünstige Minderung der Treibhausgasemissionen identifiziert werden. Es zeigt sich, dass die Wärmebereitstellung im Hinblick auf die Gesamtheit der hier untersuchten Aspekte die vorteilhafteste Nutzungsoption darstellt. Sie ist aufgrund der höheren Effizienz bei der Biomasseumwandlung sowohl der KWK-Nutzung von Festbrennstoffen als auch der Bereitstellung gasförmiger Kraftstoffe vorzuziehen. Demgegenüber erweisen sich sowohl die Bereitstellung von Biokraftstoffen der 1. Generation, wie z. B. Biodiesel aus Raps und Ethanol aus Zuckerrüben, als auch die Nutzung von Biogas mit geringen Wärmenutzungsgraden als vergleichsweise wenig vorteilhaft. Es zeigt sich deutlich, dass der Effizienz der Biomassebereitstellung und -konversion vor den hier erarbeiteten Ergebnissen eine besondere Aufmerksamkeit bei der zukünftigen Bioenergienutzung in Deutschland zukommen sollte, da diese nicht nur einen bedeutenden Einfluss auf die Gesamteffizienz der Nutzungspfade sondern auch auf andere Aspekte, wie z. B. die spezifischen Emissionen und das Substitutionspotenzial für fossile Energieträger aufweist. Zudem wird klar, dass insbesondere bei den Biokraftstoffen der 1. Generation eine verstärkte energetische Nutzung der Koppelprodukte zur Verbesserung der Energiebilanz erfolgen sollte. Ohne die Koppelproduktnutzung erweisen sich die Gesamteffizienzen dieser Prozessketten als vergleichsweise wenig vorteilhaft. Die hier erarbeiteten Ergebnisse zeigen überdies, dass durch die Nutzung heimischer Biomasse- und Flächenpotenziale ein nennenswerter und vergleichsweise kostengünstiger Beitrag zur Minderung der energiebedingten THG-Emissionen und zur Substitution fossiler Energieträger im Energiesystem Deutschland geleistet werden kann. Rund 1.097 PJ/a an Endenergie in Form von Wärme, Strom und Kraftstoff können bei einer konsequenten Verfolgung der Klimaschutzziele bis zum Jahr 2030 durch Biomasse bereitgestellt werden. Damit kann in Deutschland im Jahr 2030 ein Anteil der heimischen Biomasse am Primärenergieverbrauch von rund 14,0 % und ein Anteil der Bioenergie am Endenergieverbrauch von 11,1 % erreicht werden. The energetic utilization of biomass comprises many different and alternative pathways for the provision of different kinds of end energy. Solid, liquid and gaseous bioenergy carriers can be transferred to heat, power and transport fuels via thermal, thermo-chemical, physio-chemical and bio-chemical conversion technologies. The preferable characteristics of biomass utilization, such as the possibility to reduce greenhouse gas (GHG) emissions and the substitution of fossil fuels, compete against the relatively high costs compared to conventional energy provision technologies. Additionally, the potentials of biomass and agricultural area for energy crop production in Germany are limited. The aim of this study is therefore the analysis and assessment of different energetic utilization pathways of biomass under technical, economic and ecological aspects against the background of energy and environment policy goals on the one hand and the limited biomass potential on the other hand. For a sample of current and prospective important process chains of the production and utilization of bioenergy carriers the energy and mass flows were balanced. In addition the energy provision costs were calculated. The following step was the integration of the different technical, economic and ecological aspects against the background of a comprehensive assessment. With regard to the competition to other renewable energies and to the conventional methods of energy supply in the energy system of Germany the utilization options were systematically assessed by means of a model based approach. Due to the analysis and assessment favourable utilization pathways for the energy provision from biomass could be identified. The results show, that the heat provision has to be evaluated as the most favourable utilization option under technical, economical and ecological aspects. Due to higher efficiencies of the biomass conversion the heat provision is more preferable than the CHP use of solid biomass as well as the provision of gaseous fuels. In contrast to that, the provision of 1st generation bio fuels, e. g. biodiesel from rapeseed and ethanol from sugar beet as well as the utilization of biogas with low heat use, has to be assessed rather less favourable. Given the presented results, the efficiency of the biomass production and conversion should play a major role in the future configuration of bioenergy in the energy system of Germany due to the high influence on the overall efficiency of the process chains and other aspects like the specific emissions and the substitution of fossil fuels. Like the efficiency the energetic utilization of by products, especially in the case of the production of 1st generation biofuels should be enhanced to improve the energy balance of these pathways. The results affirm that the utilization of national biomass and land area potentials can contribute considerably and relatively cost efficient to the reduction of GHG emissions and the substitution of fossil energy carriers. About 1,097 PJ per year in form of heat, power and transport fuels can be provided when the optimistic GHG reduction targets till 2030 will be met. In this case the national biomass shows a share of 14.0 % of primary energy demand and 11.1 % of end energy consumption.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.euAccess RoutesGreen 10 citations 10 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2009Embargo end date: 03 Sep 2009 ItalyPublisher:Universität Stuttgart Authors: König, Andreas;doi: 10.18419/opus-1816
Die energetische Nutzung von Biomasse umfasst eine Vielzahl von unterschiedlichen und alternativen Pfaden zur Endenergiebereitstellung. Feste, flüssige und gasförmige Bioenergieträger können über thermische, thermo-chemische, physikalisch-chemische und biologisch-chemische Konversionsverfahren alternativ in Wärme, Strom und Kraftstoffe überführt werden. Dabei stehen der Möglichkeit durch die Biomassenutzung einen Beitrag zur Minderung von Treibhausgasemissionen (THG-Emissionen) und zur Substitution fossiler Energieträger zu leisten, erhöhte Kosten im Vergleich zu den konventionellen Bereitstellungsverfahren gegenüber. Zudem gilt im Hinblick auf einen Ausbau der Bioenergie zu berücksichtigen, dass trotz des regenerativen Charakters der Biomasse als erneuerbare Energiequelle, die Biomasse- und Flächenpotenziale in Deutschland begrenzt sind. Ziel dieser Arbeit ist daher die Analyse und Bewertung unterschiedlicher energetischer Nutzungspfade von Biomasse unter technischen, ökonomischen und ökologischen Gesichtspunkten vor dem Hintergrund energie- und umweltpolitischer Zielsetzungen einerseits und der Biomassepotenziale in Deutschland andererseits. Dafür wurden für eine Auswahl an heute und zukünftig wichtigen Prozessketten der Energieträgerproduktion und -nutzung sowohl Energie- und Stoffstrombilanzen erstellt als auch die Kosten der Energiegestehung berechnet. Anhand der unterschiedlichen daraus ableitbaren technischen, ökonomischen und ökologischen Aspekte erfolgt eine umfassende Bewertung der Nutzungspfade. Im Hinblick auf die Konkurrenz zu anderen erneuerbaren und den konventionellen Verfahren der Energiebereitstellung im Energiesystem Deutschland wurden die Nutzungsoptionen für Biomasse anhand einer modellgestützten Szenarioanalyse zudem systemisch bewertet. Durch die Analyse und Bewertung konnten vorteilhafte Nutzungspfade für die Endenergiebereitstellung aus Biomasse im Hinblick auf eine effiziente Biomassenutzung und eine kostengünstige Minderung der Treibhausgasemissionen identifiziert werden. Es zeigt sich, dass die Wärmebereitstellung im Hinblick auf die Gesamtheit der hier untersuchten Aspekte die vorteilhafteste Nutzungsoption darstellt. Sie ist aufgrund der höheren Effizienz bei der Biomasseumwandlung sowohl der KWK-Nutzung von Festbrennstoffen als auch der Bereitstellung gasförmiger Kraftstoffe vorzuziehen. Demgegenüber erweisen sich sowohl die Bereitstellung von Biokraftstoffen der 1. Generation, wie z. B. Biodiesel aus Raps und Ethanol aus Zuckerrüben, als auch die Nutzung von Biogas mit geringen Wärmenutzungsgraden als vergleichsweise wenig vorteilhaft. Es zeigt sich deutlich, dass der Effizienz der Biomassebereitstellung und -konversion vor den hier erarbeiteten Ergebnissen eine besondere Aufmerksamkeit bei der zukünftigen Bioenergienutzung in Deutschland zukommen sollte, da diese nicht nur einen bedeutenden Einfluss auf die Gesamteffizienz der Nutzungspfade sondern auch auf andere Aspekte, wie z. B. die spezifischen Emissionen und das Substitutionspotenzial für fossile Energieträger aufweist. Zudem wird klar, dass insbesondere bei den Biokraftstoffen der 1. Generation eine verstärkte energetische Nutzung der Koppelprodukte zur Verbesserung der Energiebilanz erfolgen sollte. Ohne die Koppelproduktnutzung erweisen sich die Gesamteffizienzen dieser Prozessketten als vergleichsweise wenig vorteilhaft. Die hier erarbeiteten Ergebnisse zeigen überdies, dass durch die Nutzung heimischer Biomasse- und Flächenpotenziale ein nennenswerter und vergleichsweise kostengünstiger Beitrag zur Minderung der energiebedingten THG-Emissionen und zur Substitution fossiler Energieträger im Energiesystem Deutschland geleistet werden kann. Rund 1.097 PJ/a an Endenergie in Form von Wärme, Strom und Kraftstoff können bei einer konsequenten Verfolgung der Klimaschutzziele bis zum Jahr 2030 durch Biomasse bereitgestellt werden. Damit kann in Deutschland im Jahr 2030 ein Anteil der heimischen Biomasse am Primärenergieverbrauch von rund 14,0 % und ein Anteil der Bioenergie am Endenergieverbrauch von 11,1 % erreicht werden. The energetic utilization of biomass comprises many different and alternative pathways for the provision of different kinds of end energy. Solid, liquid and gaseous bioenergy carriers can be transferred to heat, power and transport fuels via thermal, thermo-chemical, physio-chemical and bio-chemical conversion technologies. The preferable characteristics of biomass utilization, such as the possibility to reduce greenhouse gas (GHG) emissions and the substitution of fossil fuels, compete against the relatively high costs compared to conventional energy provision technologies. Additionally, the potentials of biomass and agricultural area for energy crop production in Germany are limited. The aim of this study is therefore the analysis and assessment of different energetic utilization pathways of biomass under technical, economic and ecological aspects against the background of energy and environment policy goals on the one hand and the limited biomass potential on the other hand. For a sample of current and prospective important process chains of the production and utilization of bioenergy carriers the energy and mass flows were balanced. In addition the energy provision costs were calculated. The following step was the integration of the different technical, economic and ecological aspects against the background of a comprehensive assessment. With regard to the competition to other renewable energies and to the conventional methods of energy supply in the energy system of Germany the utilization options were systematically assessed by means of a model based approach. Due to the analysis and assessment favourable utilization pathways for the energy provision from biomass could be identified. The results show, that the heat provision has to be evaluated as the most favourable utilization option under technical, economical and ecological aspects. Due to higher efficiencies of the biomass conversion the heat provision is more preferable than the CHP use of solid biomass as well as the provision of gaseous fuels. In contrast to that, the provision of 1st generation bio fuels, e. g. biodiesel from rapeseed and ethanol from sugar beet as well as the utilization of biogas with low heat use, has to be assessed rather less favourable. Given the presented results, the efficiency of the biomass production and conversion should play a major role in the future configuration of bioenergy in the energy system of Germany due to the high influence on the overall efficiency of the process chains and other aspects like the specific emissions and the substitution of fossil fuels. Like the efficiency the energetic utilization of by products, especially in the case of the production of 1st generation biofuels should be enhanced to improve the energy balance of these pathways. The results affirm that the utilization of national biomass and land area potentials can contribute considerably and relatively cost efficient to the reduction of GHG emissions and the substitution of fossil energy carriers. About 1,097 PJ per year in form of heat, power and transport fuels can be provided when the optimistic GHG reduction targets till 2030 will be met. In this case the national biomass shows a share of 14.0 % of primary energy demand and 11.1 % of end energy consumption.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18419/opus-1816&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 10 citations 10 popularity Top 10% influence Top 10% impulse Top 10% Powered by BIP!
more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2009Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=10.18419/opus-1816&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2012 Germany Funded by:EC | ECOMOVEEC| ECOMOVEHöltl, Arne; Schießl, Caroline; Fricke, Nicola; Hoek, Roederick; Laborda, Josep; Bernatallada, Guillem;The Validation and Evaluation sub-project of the eCoMove project groups a number of complementary activities including the core tasks to validate the functionality of the eCoMove system and applications, and to evaluate if the aimed reduction of 20% overall energy consumption can be achieved. Besides technical requirements a validation process also has to consider non-technical requirements of potential users of the eCoMove system which were in the focus of research for this deliverable.
DLR publication serv... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.All Research productsarrow_drop_down <script type="text/javascript"> <!-- document.write('<div id="oa_widget"></div>'); document.write('<script type="text/javascript" src="https://beta.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=od______1640::41d01108cfda2e1d9355ba29c0894844&type=result"></script>'); --> </script>
For further information contact us at helpdesk@openaire.euAccess RoutesGreen 0 citations 0 popularity Average influence Average impulse Average Powered by BIP!
more_vert DLR publication serv... arrow_drop_down add ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2012 Germany Funded by:EC | ECOMOVEEC| ECOMOVEHöltl, Arne; Schießl, Caroline; Fricke, Nicola; Hoek, Roederick; Laborda, Josep; Bernatallada, Guillem;The Validation and Evaluation sub-project of the eCoMove project groups a number of complementary activities including the core tasks to validate the functionality of the eCoMove system and applications, and to evaluate if the aimed reduction of 20% overall energy consumption can be achieved. Besides technical requirements a validation process also has to consider non-technical requirements of potential users of the eCoMove system which were in the focus of research for this deliverable.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2019Publisher:TU Wien Authors: Steinmetz, Lisa-Anna;Der Klimawandel und die damit einhergehenden negativen Auswirkungen stellen eine zentrale Herausforderung f��r St��dte, wie beispielsweise Wien dar. Der urbane Raum wird in Zukunft durch seine dichte Bebauung und den hohen Versiegelungsgrad ��berdurchschnittlich stark von den Folgen der Klimaerw��rmung betroffen sein. Um dem Klimawandel entgegenzuwirken oder ihn gar aufzuhalten, wurden auf internationaler, europ��ischer, nationaler und lokaler Ebene bereits zahlreiche rechtliche Regelungen umgesetzt, um einerseits die CO2-Emissionen zu reduzieren beziehungsweise einzuschr��nken und andererseits der Anpassung an den Klimawandel Folge zu leisten. Die Rechtsmaterie reicht hierbei von v��lkerrechtlichen Vertr��gen, Verordnungen ��ber Gesetze bis hin zu einfachen Normen. Ein Hauptverursacher der CO2-Emissionen in Wien stellt, neben den Sektoren ���Verkehr��� und ���Energie���, der Geb��udesektor dar. Neben der CO2-Reduktion kann im Bereich der Geb��ude ebenfalls ma��geblich zur Klimawandelanpassung beigetragen werden. In der Bundeshauptstadt Wien werden bereits Ma��nahmen auf der Geb��udeebene umgesetzt, um sowohl den Klimaschutz als auch die Klimawandelanpassung voranzutreiben. Die Ma��nahmen gliedern sich hierbei in Begr��nung, thermisch-energetische Sanierung, energieeffiziente Geb��ude und Geb��udek��hlung. Alle Ma��nahmen f��hren zu einer Verbesserung des Innenraumklimas und einer CO2- Reduktion, wobei das Ausma�� der Minderung je nach umgesetzter Ma��nahme variiert. Weiters ist durch Ma��nahmen, wie beispielsweise die Fassadenbegr��nung, auch eine Abk��hlung des Mikroklimas in der unmittelbaren Umgebung m��glich. Climate change and the associated negative impacts represent a central challenge for cities such as Vienna. In the future, urban areas will be affected to an above-average extent by the consequences of global warming due to their building desnity and high degree of land sealing. In order to counteract, or even stop climate change, numerous legal regulations have already been implemented at international, european, national and regional level in order to reduce or restrict CO2-emissions on the one hand and to adapt to climate change on the other. The legal material ranges from international treaties, ordinances and laws to simple norms. Besides the sectors "transport" and "energy", the building sector is one of the main sources of CO2-emissions in Vienna. In addition to CO2 reduction, buildings can significantly contribute to climate change adaptation. In the federal capital Vienna, measures are already being implemented in the building sector to promote both climate protection and climate change adaptation. The measures are divided into greening, thermalenergetic renovation, energy-efficient buildings and passive cooling of buildings. All measures lead to an improvement of the indoor climate and a reduction of CO2, whereby the extent of the reduction varies depending on the implemented measure. In addition, measures such as the greening of facades also make it possible to cool the microclimate in the immediate vicinity.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2019Publisher:TU Wien Authors: Steinmetz, Lisa-Anna;Der Klimawandel und die damit einhergehenden negativen Auswirkungen stellen eine zentrale Herausforderung f��r St��dte, wie beispielsweise Wien dar. Der urbane Raum wird in Zukunft durch seine dichte Bebauung und den hohen Versiegelungsgrad ��berdurchschnittlich stark von den Folgen der Klimaerw��rmung betroffen sein. Um dem Klimawandel entgegenzuwirken oder ihn gar aufzuhalten, wurden auf internationaler, europ��ischer, nationaler und lokaler Ebene bereits zahlreiche rechtliche Regelungen umgesetzt, um einerseits die CO2-Emissionen zu reduzieren beziehungsweise einzuschr��nken und andererseits der Anpassung an den Klimawandel Folge zu leisten. Die Rechtsmaterie reicht hierbei von v��lkerrechtlichen Vertr��gen, Verordnungen ��ber Gesetze bis hin zu einfachen Normen. Ein Hauptverursacher der CO2-Emissionen in Wien stellt, neben den Sektoren ���Verkehr��� und ���Energie���, der Geb��udesektor dar. Neben der CO2-Reduktion kann im Bereich der Geb��ude ebenfalls ma��geblich zur Klimawandelanpassung beigetragen werden. In der Bundeshauptstadt Wien werden bereits Ma��nahmen auf der Geb��udeebene umgesetzt, um sowohl den Klimaschutz als auch die Klimawandelanpassung voranzutreiben. Die Ma��nahmen gliedern sich hierbei in Begr��nung, thermisch-energetische Sanierung, energieeffiziente Geb��ude und Geb��udek��hlung. Alle Ma��nahmen f��hren zu einer Verbesserung des Innenraumklimas und einer CO2- Reduktion, wobei das Ausma�� der Minderung je nach umgesetzter Ma��nahme variiert. Weiters ist durch Ma��nahmen, wie beispielsweise die Fassadenbegr��nung, auch eine Abk��hlung des Mikroklimas in der unmittelbaren Umgebung m��glich. Climate change and the associated negative impacts represent a central challenge for cities such as Vienna. In the future, urban areas will be affected to an above-average extent by the consequences of global warming due to their building desnity and high degree of land sealing. In order to counteract, or even stop climate change, numerous legal regulations have already been implemented at international, european, national and regional level in order to reduce or restrict CO2-emissions on the one hand and to adapt to climate change on the other. The legal material ranges from international treaties, ordinances and laws to simple norms. Besides the sectors "transport" and "energy", the building sector is one of the main sources of CO2-emissions in Vienna. In addition to CO2 reduction, buildings can significantly contribute to climate change adaptation. In the federal capital Vienna, measures are already being implemented in the building sector to promote both climate protection and climate change adaptation. The measures are divided into greening, thermalenergetic renovation, energy-efficient buildings and passive cooling of buildings. All measures lead to an improvement of the indoor climate and a reduction of CO2, whereby the extent of the reduction varies depending on the implemented measure. In addition, measures such as the greening of facades also make it possible to cool the microclimate in the immediate vicinity.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2017 GermanyAuthors: Rautmann, Christof;This thesis deals with the acoustic simulation of wind turbine noise. Turbulent boundary layer trailing-edge interaction noise is the main noise source for modern wind turbines. A hybrid approach was used to simulate this phenomenon on a two-demensional airfoil level. In a first step a numerical flow simulation (CFD) is conducted. It yields aerodynamic coefficients as well as the flow field around the airfoil and turbulence statistics from the used turbulence model. In a second step these turbulence statistics are used to reconstruct a time and space resolved turbulence field by utilizing the stochastic reconstruction method FRPM. Together with the underlying mean flow, the turbulent sound sources are used in a subsequent computational aeroacoustic (CAA) simulation. The result is the sound pressure field around the airfoil. The method was validated using experimental results from wind tunnel tests. It shows better accuracy than semi-emperical approaches and is much faster than scale resolving methods. Throughout geometry variations it was shown that airfoils with the same aerodynamic performance could have totally different overall sound emissions in a range of up to 4dB. Relations between parameters from the suction side boundary layer and the noise spectrum were shown. Guidelines for the design of low-noise airfoils were derived. To evaluate the noise levels for a whole wind turbine, a strategy was developed to simulate the overall noise by a summation of independent airfoil sections. Time and space resolved noise maps were calculated for arbitrary observer positions around the wind turbine. Noise reductions up to 2 dB were possible without drawbacks on turbine performance or loads. The presented method can be used in the early stages of future wind turbine design.
DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Other literature type 2017 GermanyAuthors: Rautmann, Christof;This thesis deals with the acoustic simulation of wind turbine noise. Turbulent boundary layer trailing-edge interaction noise is the main noise source for modern wind turbines. A hybrid approach was used to simulate this phenomenon on a two-demensional airfoil level. In a first step a numerical flow simulation (CFD) is conducted. It yields aerodynamic coefficients as well as the flow field around the airfoil and turbulence statistics from the used turbulence model. In a second step these turbulence statistics are used to reconstruct a time and space resolved turbulence field by utilizing the stochastic reconstruction method FRPM. Together with the underlying mean flow, the turbulent sound sources are used in a subsequent computational aeroacoustic (CAA) simulation. The result is the sound pressure field around the airfoil. The method was validated using experimental results from wind tunnel tests. It shows better accuracy than semi-emperical approaches and is much faster than scale resolving methods. Throughout geometry variations it was shown that airfoils with the same aerodynamic performance could have totally different overall sound emissions in a range of up to 4dB. Relations between parameters from the suction side boundary layer and the noise spectrum were shown. Guidelines for the design of low-noise airfoils were derived. To evaluate the noise levels for a whole wind turbine, a strategy was developed to simulate the overall noise by a summation of independent airfoil sections. Time and space resolved noise maps were calculated for arbitrary observer positions around the wind turbine. Noise reductions up to 2 dB were possible without drawbacks on turbine performance or loads. The presented method can be used in the early stages of future wind turbine design.
DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverOther literature type . 2017 . Peer-reviewedFull-Text: https://elib.dlr.de/115852/1/FB_2017_35.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2010 GermanyAuthors: Kihm, Alexander; Trommer, Stefan; Hebes, Paul; Mehlin, Markus;The paper investigates an economic market potential for Plug-in Hybrid- and Battery Electric vehicles considering different categories of customers in Germany from 2015 to 2030. A multi-step methodology using constraints on the current vehicle registrations and inventory is developed to derive a general framework potential and a concrete economic potential for the different vehicles and ownership models under adjustable technical and legislative aspects.
DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
You have already added works in your ORCID record related to the merged Research product.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Conference object , Other literature type 2010 GermanyAuthors: Kihm, Alexander; Trommer, Stefan; Hebes, Paul; Mehlin, Markus;The paper investigates an economic market potential for Plug-in Hybrid- and Battery Electric vehicles considering different categories of customers in Germany from 2015 to 2030. A multi-step methodology using constraints on the current vehicle registrations and inventory is developed to derive a general framework potential and a concrete economic potential for the different vehicles and ownership models under adjustable technical and legislative aspects.
DLR publication serv... arrow_drop_down DLR publication serverConference object . 2010 . Peer-reviewedFull-Text: https://elib.dlr.de/63973/1/iamf.pdfData sources: DLR publication serveradd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2013Embargo end date: 31 Oct 2013 ItalyPublisher:Universität Stuttgart Authors: Sun, Ninghong;doi: 10.18419/opus-2159
Durch die Veröffentlichung des Energiekonzeptes im September 2010 hat die deutsche Bundesregierung den Weg in das Zeitalter der erneuerbaren Energien beschrieben. Demnach wird ein großer Teil des zukünftigen Elektrizitätsversorgungssystems in Deutschland aus Wind- und Solarenergie bestehen, deren Einspeisung durch das fluktuierende natürliche Dargebot bedingt ist. Der wachsende Anteil dieser fluktuierenden Einspeisung stellt eine große Herausforderung sowohl für die kurzfristige Kraftwerkseinsatzplanung als auch für die langfristigen Investitionsentscheidungen dar. In der vorliegenden Arbeit wird ein fundamentales Elektrizitätsmarktmodell mit einer detaillierten Abbildung von den beiden Aspekten entwickelt. Mit Hilfe dieses Modells wird analysiert, mit welchen notwendigen Kraftwerkszubauten die Versorgungszuverlässigkeit bei einem hohen Anteil von fluktuierender Einspeisung in der Zukunft kostengünstig gewährleistet werden kann. Des Weiteren wird eine ausführliche Analyse der aktuellen Energiepolitik in Deutschland bezüglich der Nutzung von erneuerbaren Energien und der Kernenergie durchgeführt. The German Federal Government published its energy concept in September 2010 with a description of the road into the era of renewable energies. Therefore, the future renewable energy installed in Germany is expected to consist mostly of wind and solar, which are subject to intermittency of supply and significant fluctuations. The growing portion of energy generation by fluctuating sources is turning to a big challenge for the power plant unit commitment and the investment decisions as well. In this thesis, a fundamental electricity market model with combined modeling of these two aspects is developed. This model is subsequently applied to the German electricity market to investigate what kind of power plant investments are indispensable, considering the steadily increasing portion of energy generation from fluctuating sources, to ensure a reliable energy supply in a cost-effective way in the future. In addition, current energy policy in Germany regarding the use of renewable energy and nuclear energy is analyzed.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis , Thesis 2013Embargo end date: 31 Oct 2013 ItalyPublisher:Universität Stuttgart Authors: Sun, Ninghong;doi: 10.18419/opus-2159
Durch die Veröffentlichung des Energiekonzeptes im September 2010 hat die deutsche Bundesregierung den Weg in das Zeitalter der erneuerbaren Energien beschrieben. Demnach wird ein großer Teil des zukünftigen Elektrizitätsversorgungssystems in Deutschland aus Wind- und Solarenergie bestehen, deren Einspeisung durch das fluktuierende natürliche Dargebot bedingt ist. Der wachsende Anteil dieser fluktuierenden Einspeisung stellt eine große Herausforderung sowohl für die kurzfristige Kraftwerkseinsatzplanung als auch für die langfristigen Investitionsentscheidungen dar. In der vorliegenden Arbeit wird ein fundamentales Elektrizitätsmarktmodell mit einer detaillierten Abbildung von den beiden Aspekten entwickelt. Mit Hilfe dieses Modells wird analysiert, mit welchen notwendigen Kraftwerkszubauten die Versorgungszuverlässigkeit bei einem hohen Anteil von fluktuierender Einspeisung in der Zukunft kostengünstig gewährleistet werden kann. Des Weiteren wird eine ausführliche Analyse der aktuellen Energiepolitik in Deutschland bezüglich der Nutzung von erneuerbaren Energien und der Kernenergie durchgeführt. The German Federal Government published its energy concept in September 2010 with a description of the road into the era of renewable energies. Therefore, the future renewable energy installed in Germany is expected to consist mostly of wind and solar, which are subject to intermittency of supply and significant fluctuations. The growing portion of energy generation by fluctuating sources is turning to a big challenge for the power plant unit commitment and the investment decisions as well. In this thesis, a fundamental electricity market model with combined modeling of these two aspects is developed. This model is subsequently applied to the German electricity market to investigate what kind of power plant investments are indispensable, considering the steadily increasing portion of energy generation from fluctuating sources, to ensure a reliable energy supply in a cost-effective way in the future. In addition, current energy policy in Germany regarding the use of renewable energy and nuclear energy is analyzed.
Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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more_vert Hochschulschriftense... arrow_drop_down Hochschulschriftenserver der Universität StuttgartDoctoral thesisData sources: Hochschulschriftenserver der Universität StuttgartOnline Publikationen der Universität StuttgartDoctoral thesis . 2013Data sources: Online Publikationen der Universität Stuttgartadd ClaimPlease grant OpenAIRE to access and update your ORCID works.This Research product is the result of merged Research products in OpenAIRE.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2019 AustriaAuthors: Oberhummer, Anton;Diese Masterarbeit gibt einen Überblick über Technologien und Lösungen, welche derzeit zur Verfügung stehen, um dem steigenden Bedarf an Gebäudekühlung nachhaltig zu begegnen. Raumklimatisierung trägt zunehmend und wesentlich zum globalen Energiebedarf bei und auch der weltweite Absatz von Raumklimageräten steigt signifikant. Wie stark dieser kältetechnische Energiebedarf wächst, hängt einerseits von den politischen Maßnahmen zur Förderung nachhaltiger Systeme ab und andererseits von der Akzeptanz durch die NutzerInnen, PlanerInnen oder den Bauherren ab. Die derzeit bestehenden und auch geplanten Maßnahmen tragen jedoch nur sehr begrenzt dazu bei, dieses Wachstum nachhaltig zu bremsen. Die Entwicklung einer multikriteriellen Analysestruktur für resilientes Kühlen in Form von technologieübergreifenden Datenblättern soll ArchitektInnen, PlanerInnen und Bauherren bei der Auswahl eines für ihre Anforderungen geeigneten Kühlsystems unterstützen. Die erstellten Datenblätter stellen zum einen die technischen Daten und Leistungsgrenzen der jeweiligen Technologie übersichtlich dar und zum anderen auch deren ökologischen, ökonomischen und soziokulturellen Auswirkungen. Sämtliche Datenblätter, welche im Rahmen dieser Arbeit entwickelt und anschließend befüllt wurden sind in einer Datenblattsammlung im Anhang dieser Arbeit abgelegt. This master thesis gives an overview of technologies and solutions that are currently available to meet the increasing demand for building cooling in a sustainable way. Room air conditioning is making an increasing and significant contribution to global energy demand, and worldwide sales of room air conditioners are also rising significantly. The growing of energy needs for cooling depends on the one hand, on the political measures taken to promote sustainable systems and, on the other hand, on the level of acceptance by users, planners or building owners. However, the existing and planned measures are only making a very limited contribution to slowing this growth in the long term. The development of a multi-criteria analysis structure for resilient cooling in the form of cross-technology data sheets should support architects, planners and building owners in selecting a cooling system suitable for their requirements. The data sheets provide a clear overview of the technical data and performance limits of the respective technology on the one hand and their ecological, economic and socio-cultural effects on the other. All data sheets, which were developed and subsequently filled in within the scope of this work, are stored in a data sheet collection in the appendix of this work. vorgelegt von: Anton Oberhummer Wien, FH Campus Wien, Masterarb., 2019
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Master thesis 2019 AustriaAuthors: Oberhummer, Anton;Diese Masterarbeit gibt einen Überblick über Technologien und Lösungen, welche derzeit zur Verfügung stehen, um dem steigenden Bedarf an Gebäudekühlung nachhaltig zu begegnen. Raumklimatisierung trägt zunehmend und wesentlich zum globalen Energiebedarf bei und auch der weltweite Absatz von Raumklimageräten steigt signifikant. Wie stark dieser kältetechnische Energiebedarf wächst, hängt einerseits von den politischen Maßnahmen zur Förderung nachhaltiger Systeme ab und andererseits von der Akzeptanz durch die NutzerInnen, PlanerInnen oder den Bauherren ab. Die derzeit bestehenden und auch geplanten Maßnahmen tragen jedoch nur sehr begrenzt dazu bei, dieses Wachstum nachhaltig zu bremsen. Die Entwicklung einer multikriteriellen Analysestruktur für resilientes Kühlen in Form von technologieübergreifenden Datenblättern soll ArchitektInnen, PlanerInnen und Bauherren bei der Auswahl eines für ihre Anforderungen geeigneten Kühlsystems unterstützen. Die erstellten Datenblätter stellen zum einen die technischen Daten und Leistungsgrenzen der jeweiligen Technologie übersichtlich dar und zum anderen auch deren ökologischen, ökonomischen und soziokulturellen Auswirkungen. Sämtliche Datenblätter, welche im Rahmen dieser Arbeit entwickelt und anschließend befüllt wurden sind in einer Datenblattsammlung im Anhang dieser Arbeit abgelegt. This master thesis gives an overview of technologies and solutions that are currently available to meet the increasing demand for building cooling in a sustainable way. Room air conditioning is making an increasing and significant contribution to global energy demand, and worldwide sales of room air conditioners are also rising significantly. The growing of energy needs for cooling depends on the one hand, on the political measures taken to promote sustainable systems and, on the other hand, on the level of acceptance by users, planners or building owners. However, the existing and planned measures are only making a very limited contribution to slowing this growth in the long term. The development of a multi-criteria analysis structure for resilient cooling in the form of cross-technology data sheets should support architects, planners and building owners in selecting a cooling system suitable for their requirements. The data sheets provide a clear overview of the technical data and performance limits of the respective technology on the one hand and their ecological, economic and socio-cultural effects on the other. All data sheets, which were developed and subsequently filled in within the scope of this work, are stored in a data sheet collection in the appendix of this work. vorgelegt von: Anton Oberhummer Wien, FH Campus Wien, Masterarb., 2019
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2022Embargo end date: 10 Jul 2023Publisher:Universitätsbibliothek Siegen Authors: Stobernack, Niklas;Die vorliegende Arbeit wurde im Rahmen eines Forschungsprojektes metabolon IIb (EFRE-0500033) erstellt. Im Sinne der Kreislaufwirtschaft war das Schließen großer Energie- und Stoffkreisläufe Gegenstand einer Vielzahl von Teilprojekten. Ziel war es, aus biogenen sowie abfallstämmigen Reststoffen entweder regenerative Energie zu gewinnen oder werthaltige Materialien in den anthropogenen Stoffkreislauf zurückzuführen. Die vorliegende Arbeit enstand bei der Bearbeitung der Fragestellung bezüglich der Bedeutung der hydrothermalen Karbonisierung (HTC) im Hinblick auf die zukünftige regenerative Energiebereitstellung. Das übergeordnete Ziel der Arbeit bestand darin, den HTC-Prozess in ganzheitliche Prozessketten zu integrieren und diese im Hinblick auf die energetische Verwertung unter Berücksichtigung der Treibhausgasemissionen (GWP) zu bewerten. Da es nur wenige HTC-Anlagen im industriellen Maßstab gibt und keine standardisierten Modellvorstellungen zur Abbildung des Prozesses existieren, wurde ein tragfähiges Reaktormodell auf Basis eines empirischen kinetischen Ansatzes für die HTC entwickelt. Das Reaktormodell wurde genutzt, um die Massen- und Energieverteilung auf die drei Produktphasen (fest, flüssig und gasförmig) zu berechnen und mit entsprechenden experimentellen Untersuchungen zu evaluieren. Ein potentielles Einsatzgebiet bietet die HTC von häuslichem Bioabfall und dessen Gärresten, die als Eingangsstoff in der Arbeit verwendet wurden. Die Prozessketten wurden im Anschluss anhand von Prozesswirkungsgraden beurteilt und mit konventionellen Prozessketten verglichen. Als konventionelle Prozessketten wurden die Verbrennung des Bioabfalls in einer Müllverbrennungsanlage („I“) und dessen Vergärung mit anschließender Kompostierung („AD+comp“) untersucht. Dabei wurden exergetische Nettowirkungsgrade von 13,7% für „I“ und 12,1% für „AD+comp“ erzielt. Durch die Integration einer HTC konnte der exergetische Wirkungsgrad im Vergleich zu der Verbrennung in einer Müllverbrennungsanlage um 70% und im Vergleich zu der konventionellen Vergärung um 93% gesteigert werden. Zusätzlich wurden mit Hilfe der Datensätze aus dem Gesamtmodell das GWP ermittelt. Das GWP lag in den Referenzfällen bei ∼500gCO2,Eq kW−1 h−1. Durch die Integration der HTC-Einheit konnten das GWP um bis zu 30% im Vergleich zu den konventionellen Behandlungspfaden reduziert werden. The thesis presented here was produced as part of a research project metabolon IIb (EFRE-0500033). In terms of the circular economy, the focus was on closing energy cycles and material circulations. The goal was either to generate regenerative energy or to return valuable materials back to the anthropogenic material cycle, with the focus on biogenic or waste residues as input material. The thesis arose while dealing with the question of the importance of hydrothermal carbonization (HTC) regarding future regenerative energy supply. The overall goal of the thesis was then to integrate the HTC process into holistic process chains and to evaluate its energetic use considering the global warming potential (GWP). Due to the lack of HTC plants on an industrial scale and standardized model implementations, a feasible reactor model based on an empirical kinetic approach for HTC was developed. The model was used to calculate the mass and energy distribution in the three production phases (solid, liquid, and gaseous) and evaluated with experimental analyses. The HTC offers a potential application from the organic fraction of municipal solid waste (OFMSW) and its digestate, which were used as feedstock. In addition, the process chains were assessed based on their efficiencies and compared with conventional process chains. The representative conventional process chains in this case were the incineration of OFMSW in a waste incineration plant (“I“) and the treatment in an anaerobe digestion plant followed by composting (“AD+comp“). Here, the exergetic net efficiency was 13,7% for “I“ and 12,1% for “AD+comp“. The implementation of an HTC-process increased the exergetic efficiencies by 70% compared with “I“ and by 93% compared with “AD+comp“. The GWP was ∼500gCO2,Eq kW−1 h−1 in the reference cases. The integration of an HTC unit reduced the GWP by 30% compared to the conventional pathway.
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For further information contact us at helpdesk@openaire.eudescription Publicationkeyboard_double_arrow_right Doctoral thesis 2022Embargo end date: 10 Jul 2023Publisher:Universitätsbibliothek Siegen Authors: Stobernack, Niklas;Die vorliegende Arbeit wurde im Rahmen eines Forschungsprojektes metabolon IIb (EFRE-0500033) erstellt. Im Sinne der Kreislaufwirtschaft war das Schließen großer Energie- und Stoffkreisläufe Gegenstand einer Vielzahl von Teilprojekten. Ziel war es, aus biogenen sowie abfallstämmigen Reststoffen entweder regenerative Energie zu gewinnen oder werthaltige Materialien in den anthropogenen Stoffkreislauf zurückzuführen. Die vorliegende Arbeit enstand bei der Bearbeitung der Fragestellung bezüglich der Bedeutung der hydrothermalen Karbonisierung (HTC) im Hinblick auf die zukünftige regenerative Energiebereitstellung. Das übergeordnete Ziel der Arbeit bestand darin, den HTC-Prozess in ganzheitliche Prozessketten zu integrieren und diese im Hinblick auf die energetische Verwertung unter Berücksichtigung der Treibhausgasemissionen (GWP) zu bewerten. Da es nur wenige HTC-Anlagen im industriellen Maßstab gibt und keine standardisierten Modellvorstellungen zur Abbildung des Prozesses existieren, wurde ein tragfähiges Reaktormodell auf Basis eines empirischen kinetischen Ansatzes für die HTC entwickelt. Das Reaktormodell wurde genutzt, um die Massen- und Energieverteilung auf die drei Produktphasen (fest, flüssig und gasförmig) zu berechnen und mit entsprechenden experimentellen Untersuchungen zu evaluieren. Ein potentielles Einsatzgebiet bietet die HTC von häuslichem Bioabfall und dessen Gärresten, die als Eingangsstoff in der Arbeit verwendet wurden. Die Prozessketten wurden im Anschluss anhand von Prozesswirkungsgraden beurteilt und mit konventionellen Prozessketten verglichen. Als konventionelle Prozessketten wurden die Verbrennung des Bioabfalls in einer Müllverbrennungsanlage („I“) und dessen Vergärung mit anschließender Kompostierung („AD+comp“) untersucht. Dabei wurden exergetische Nettowirkungsgrade von 13,7% für „I“ und 12,1% für „AD+comp“ erzielt. Durch die Integration einer HTC konnte der exergetische Wirkungsgrad im Vergleich zu der Verbrennung in einer Müllverbrennungsanlage um 70% und im Vergleich zu der konventionellen Vergärung um 93% gesteigert werden. Zusätzlich wurden mit Hilfe der Datensätze aus dem Gesamtmodell das GWP ermittelt. Das GWP lag in den Referenzfällen bei ∼500gCO2,Eq kW−1 h−1. Durch die Integration der HTC-Einheit konnten das GWP um bis zu 30% im Vergleich zu den konventionellen Behandlungspfaden reduziert werden. The thesis presented here was produced as part of a research project metabolon IIb (EFRE-0500033). In terms of the circular economy, the focus was on closing energy cycles and material circulations. The goal was either to generate regenerative energy or to return valuable materials back to the anthropogenic material cycle, with the focus on biogenic or waste residues as input material. The thesis arose while dealing with the question of the importance of hydrothermal carbonization (HTC) regarding future regenerative energy supply. The overall goal of the thesis was then to integrate the HTC process into holistic process chains and to evaluate its energetic use considering the global warming potential (GWP). Due to the lack of HTC plants on an industrial scale and standardized model implementations, a feasible reactor model based on an empirical kinetic approach for HTC was developed. The model was used to calculate the mass and energy distribution in the three production phases (solid, liquid, and gaseous) and evaluated with experimental analyses. The HTC offers a potential application from the organic fraction of municipal solid waste (OFMSW) and its digestate, which were used as feedstock. In addition, the process chains were assessed based on their efficiencies and compared with conventional process chains. The representative conventional process chains in this case were the incineration of OFMSW in a waste incineration plant (“I“) and the treatment in an anaerobe digestion plant followed by composting (“AD+comp“). Here, the exergetic net efficiency was 13,7% for “I“ and 12,1% for “AD+comp“. The implementation of an HTC-process increased the exergetic efficiencies by 70% compared with “I“ and by 93% compared with “AD+comp“. The GWP was ∼500gCO2,Eq kW−1 h−1 in the reference cases. The integration of an HTC unit reduced the GWP by 30% compared to the conventional pathway.
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