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  • Energy Research
  • AT
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  • TU Wien

  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Reinhard Haas; Michael Hartner; André Ortner; orcid Albert Hiesl;
    Albert Hiesl
    ORCID
    Harvested from ORCID Public Data File

    Albert Hiesl in OpenAIRE

    Abstract The integration of photovoltaic as a fluctuating renewable energy source has raised concerns about additional costs for the electricity system due to the variable nature of power output leading to more frequent and steeper ramping of conventional power plants and the need for backup capacity. One way to reduce those costs can be the variation of installation angles of PV panels at different locations to smoothen out the total production from PV in the whole system. To a certain extent steeper tilt angles can shift the production from summer months to winter months and the variation of the azimuth from east to west can partly shift production during the day increasing the production in morning or afternoon hours. However, for fixed mounted PV panels, there is one angle combination that maximizes the total output of the PV panel throughout the year and each deviation from this angle combination results in losses of total output. This paper evaluates the trade-off between annual energy losses and possible electricity generation cost reductions through adapting PV installation angles for the current electricity system and for potentially higher PV penetration levels in the future. A theoretical explanation why the annual maximum output of a PV system is not always the optimal solution from a system perspective is presented. To assess the effects of deviations from output maximizing angles at present, the wholesale market value of PV for various tilt angles and orientations in 23 regions of Austria and Germany using historic data on solar radiation and hourly electricity prices is calculated. For the analysis of future system states with potentially high shares of PV in the market, a linear optimization model representing the German and Austrian electricity wholesale market is applied. Furthermore the article provides additional insights on the market value of PV and CO2 emission reduction potential at high PV penetration levels from the model. Both, the historic analyses and the model results for Austria and Germany suggest that at present PV penetration levels, the angle combination that maximizes the output of a PV system also provides the highest spot market value and consequently minimal total system costs. For higher shares of PV in the system the model suggests deviations from those angle combinations to be optimal. For additional PV capacity of up to 40 GW (72 GW in total) a slight shift to easterly orientated PV modules is observed. For very high penetration levels of more than additional 100 GW optimal deviation angles deviate strongly from the output maximizing angles and the model shows optimal angles to be up to 20° steeper and orientations from east to west. However, the impact on total electricity generation costs is very low even for extremely high shares of PV in the system (

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Applied Energyarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Applied Energy
    Article . 2015 . Peer-reviewed
    License: Elsevier TDM
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Applied Energyarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Applied Energy
      Article . 2015 . Peer-reviewed
      License: Elsevier TDM
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  • Authors: Medic, Tanja;

    The final energy consumption in buildings in Europe is more than 40% of the total energy consumption and is growing steadily due to the constant increase in living standards. At the same time, building sector has the highest potential for ecological and energy savings and the implementation of renewable energy sources. Croatia itself is rich in renewable energy resources, especially the Dalmatian region with its Mediterranean climate that, according to UNDP, has a great predisposition for a self-sustainable region. In order to begin to rely on on- site renewable resources a series of activities at the national level, and especially at the local level is required. Due to the favourable geographic location, concern for the pupils and the environment, the Elementary school Ostrog wants to become the first energy independent school in Croatia, meaning it produces as much energy on site as what is consumed throughout the course of the year. This thesis focuses on examining the best and most feasible ways to meet the school's need for energy: through combination of energy efficiency measures and implementation of locally available renewable sources. Through a dynamic simulation software two scenarios were applied: the refurbishment of the lighting system and the thermal improvement of the opaque part of the building envelope. The results were compared and evaluated according to the different criteria: electricity and heating demand. The renewable energy potential on site was calculated and explored if it can cover the school's annual need for electrical energy through installed photovoltaic system and heating demand through biomass from olive pomace. Finally, the financial costs for proposed measures were calculated, as well as possibilities for financing them.

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  • Authors: orcid Robert J. Norman;
    Robert J. Norman
    ORCID
    Harvested from ORCID Public Data File

    Robert J. Norman in OpenAIRE
    Shuangxia Tang; Yang Zhao; orcid Guenther Retscher;
    Guenther Retscher
    ORCID
    Harvested from ORCID Public Data File

    Guenther Retscher in OpenAIRE
    +4 Authors

    Wi-Fi and smartphone based positioning technologies are playing a more and more important role for tracking and positioning due to the rapid development of the smartphone market. However, the low positioning accuracy of these technologies is still an issue for indoor positioning. This research is part of an Australian Research Council (ARC) project required by a large global shopping mall company located in Australia. It aims to develop an effective customer tracking approach for acquiring shopping behavior of customers and providing better services. Currently, the log data provided by the company only records one Wi-Fi connection at a time for each smartphone user, which makes most of the conventional tracking and positioning methods inapplicable. Only the cell of origin (CoO) method can be selected for the customer tracking and positioning. The designated shopping mall floor was initially partitioned using Voronoi diagram based on the distribution of the access point (AP) and received signal strength indicator (RSSI) values. However, the cells created by the Voronoi diagram did not reflect the real indoor complexity of the surrounding environment. In order to solve this problem, a new algorithm called the common hand over point determination (CHOPD) algorithm was developed, in which the statistical RSSI values from the real Wi-Fi network log data are used for the spatial and temporal position calculation of the handover point (HOP). The boundary of the cell can be determined once the HOP position is calculated. The RSSI values are detected by the Wi-Fi network from the smartphone carried by each customer walking on the shopping mall floor as they passed through two adjacent APs. The new algorithm was tested in a large shopping-mall-like space and 100 test sampling records were used for the HOP calculation. The results from the new algorithm were assessed and were found to be within 9cm difference from the true HOP location.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: orcid Sophie Knöttner;
    Sophie Knöttner
    ORCID
    Harvested from ORCID Public Data File

    Sophie Knöttner in OpenAIRE
    Benedikt Leitner; René Hofmann;
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Energy Conversion an...arrow_drop_down
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    Energy Conversion and Management
    Article . 2022 . Peer-reviewed
    License: CC BY
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Energy Conversion an...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Energy Conversion and Management
      Article . 2022 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: orcid Norbert Pfeifer;
    Norbert Pfeifer
    ORCID
    Harvested from ORCID Public Data File

    Norbert Pfeifer in OpenAIRE
    orcid Martin Rutzinger;
    Martin Rutzinger
    ORCID
    Harvested from ORCID Public Data File

    Martin Rutzinger in OpenAIRE
    Andreas Jochem; orcid Bernhard Höfle;
    Bernhard Höfle
    ORCID
    Harvested from ORCID Public Data File

    Bernhard Höfle in OpenAIRE

    A relative height threshold is defined to separate potential roof points from the point cloud, followed by a segmentation of these points into homogeneous areas fulfilling the defined constraints of roof planes. The normal vector of each laser point is an excellent feature to decompose the point cloud into segments describing planar patches. An objectbased error assessment is performed to determine the accuracy of the presented classification. It results in 94.4% completeness and 88.4% correctness. Once all roof planes are detected in the 3D point cloud, solar potential analysis is performed for each point. Shadowing effects of nearby objects are taken into account by calculating the horizon of each point within the point cloud. Effects of cloud cover are also considered by using data from a nearby meteorological station. As a result the annual sum of the direct and diffuse radiation for each roof plane is derived. The presented method uses the full 3D information for both feature extraction and solar potential analysis, which offers a number of new applications in fields where natural processes are influenced by the incoming solar radiation (e.g., evapotranspiration, distribution of permafrost). The presented method detected fully automatically a subset of 809 out of 1,071 roof planes where the arithmetic mean of the annual incoming solar radiation is more than 700 kWh/m2.

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    Sensors
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: Manfred Schrodl;

    In diesem Beitrag wird gezeigt, dass das sensorlose „INFORM-Verfahren“ zur Drehwinkelerfassung an Permanentmagnet-Synchronmaschinen in ausfallkritischen transienten positions-, drehzahl- und drehmomentgeregelten Anwendungen vorteilhaft eingesetzt werden kann. Nach einer kurzen Vorstellung der Grundzuge des INFORM-Verfahrens wird die Integration in einen Drehwinkel-, Drehzahl- und Lastmomentbeobachter gezeigt. Das zentrale Kapitel beschaftigt sich mit den statistischen Eigenschaften des INFORM-ermittelten Drehwinkels sowie mit einer Quantifizierung der Ausfallswahrscheinlichkeit durch einen massiven Winkelschatzfehler. Ein Anwendungsfall aus der US-KFZ-Zulieferindustrie zeigt die Auslegung des INFORM-Antriebs anhand des Anforderungsprofils des Einsatzfalles im Zusammenwirken mit den statistischen Eigenschaften des Antriebs. Die gezeigte Anwendung hat den Serieneinsatz seit Janner 2003 problemlos bewaltigt. Weitere Serien des sensorlosen Antriebssystems werden laufend produziert.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao e & i Elektrotechnik...arrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    e & i Elektrotechnik und Informationstechnik
    Article . 2004 . Peer-reviewed
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao e & i Elektrotechnik...arrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      e & i Elektrotechnik und Informationstechnik
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  • Authors: Homagk, Lisa-Maria;

    Die vermehrt aufkommenden Diskussionen zur resilienten Stadt sind vor allem gepr��gt durch globale Ph��nomene wie nat��rliche oder f��r nat��rlich gehaltene Katastrophen, sozio��konomische Krisen, den Klimawandel sowie die Zunahme der Verst��dterung. Sowohl hinsichtlich seiner Verursachung als auch seiner Folgen wird der Begri der Resilienz aus heterogenen Perspektiven definiert und in den wissenschaftlichen Diskurs eingebracht. In der deutschsprachigen sowie in der internationalen raumbezogenen Forschungslandschaft gibt es eine Reihe aktueller Publikationen zu urbaner Resilienz; jedoch nur wenige, die sich mit strategischen Steuerungsanforderungen befassen. Vor diesem Hintergrund wird im Zuge der Diplomarbeit eruiert, ob urbane Resilienz ein brauchbares Konzept f��r die Steuerung der Stadtentwicklung sein kann. Mithilfe aktueller Ver��ffentlichungen aus der stadtbezogenen Resilienzforschung werden die abstrakten Merkmale der unterschiedlichen theoretischen Modelle mit konkreten Eigenschaften belegt und Kriterien zur Unterst��tzung einer resilienten Stadtentwicklung formuliert. Am Beispiel der Stadt Hamburg wird systematisch ��berpr��ft, ob und inwiefern bei der Stadtentwicklung die Leitidee der Resilienz explizit oder implizit verfolgt wird. Dabei werden relevante ��bergeordnete Stadtentwicklungsstrategien sowie ausgew��hlte Stadtentwicklungsprojekte untersucht und ma��gebliche StakeholderInnen befragt. Im Anschluss wird herausgearbeitet, welche Steuerungsanforderungen sich angesichts der unterschiedlich beteiligten StakeholderInnen der Hamburger Stadtentwicklung stellen. Urbane Resilienz ist keine neue Planungstheorie, die bisherige stadtplanerische Leitbilder abl��st; vielmehr ist sie eine F��higkeit des Systems Stadt und kann daher (neue) inhaltliche und konzeptionelle Aspekte zur Steuerung der Stadtentwicklung beitragen. The growing emergence of debates on resilient cities is dominated by global phenomena such as natural or as natural considered disasters, socioeconomic crises, climate change and increasing urbanisation. The concept of resilience is defined through heterogeneous perspectives, both in terms of its causation and its consequences, and introduced into the scientific discourse. There are a number of recent publications on urban resilience in the German-speaking and international spatial research landscape; however only a few that deal with strategic control requirements. Against this background, the diploma thesis investigates whether urban resilience can be a useful concept for managing urban development. Regarding to recent publications from urban resilience research, concrete characteristics are assigned to the abstract attributes of the dierent theoretical models. Further criteria for supporting a resilient urban development are formulated. Using the example of the city of Hamburg, it is systematically examined whether and to what extent the idea of resilience - explicitly or implicitly - is implemented in urban development activities. Relevant urban development strategies as well as selected urban development projects are investigated and relevant stakeholders surveyed. Subsequently, it will be elaborated which control requirements arise considering the stakeholders involved to varying extents in the urban development of Hamburg. Urban resilience is not a new planning theory that replaces previous urban planning policies; rather, it is an ability of urban systems and can therefore contribute (new) content and conceptual aspects to control of urban development.

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  • Authors: Haidinger, Patrick Andreas Johannes;

    Die Durchströmturbine ist eine radiale Gleichdruckturbine, welche zweimal beaufschlagt wird. Das einströmende Wasser wird stoßfrei und mit hoher Geschwindigkeit dem walzenförmigen Trommelrad zugeführt. Dabei tritt der Freistrahl auf den Laufradschaufeln auf, durchquert das Laufrad und tritt auf den gegenüberliegenden Laufradschaufeln erneut auf. Aufgrund der einfachen und gleichzeitig robusten Bauweise wird die Durchströmturbine häufig bei Kleinwasserkraftwerken verwendet. Kleinwasserkraftwerke gewinnen mit dem Ziel der emissionsfreien Energiegewinnung immer mehr an Bedeutung - vor allem zur Deckung des Energiebedarfs bei Industrieunternehmen oder im Interesse des Umweltschutzes in Entwicklungsländern.Zur Leistungsbewertung der Durchströmturbine wird in dieser Arbeit eine numerische Strömungssimulation durchgeführt. Ausganglage dafür sind zur Verfügung gestellte Geometriedaten einer Versuchs-Durchströmturbine. Mit ANSYS ICEMCFD werden die Bereiche definiert sowie ein strukturiertes Netz generiert. Das vernetzte Modell wird in ANSYS FLUENT importiert und die numerische Strömungssimulation gestartet. Um vergleichbare Ergebnisse zu erhalten wird die Simulation für drei unterschiedliche Winkelgeschwindigkeiten durchgeführt: 20 rad/s, 25 rad/s und 35 rad/s. Zur Durchführung einer realitätsnahen Simulation ist die Auswahl der Randbedingungen von großer Wichtigkeit.Anhand der Simulationsergebnisse wird der Wasserlauf durch die Turbine visualisiert, der Wirkungsgrad bestimmt sowie die auf die Welle wirkenden Kräfte ermittelt. Die aus der Strömunssimulation erhaltenen Werte werden abschließend noch in das Muscheldiagramm der Versuchsturbine eingetragen und die Ergebnisse verglichen. The cross flow turbine is a radial impuls turbine, which is pressurized twice. The incoming water is fed shock-free and at high velocity to the drum-shaped impeller. The free jet hits the impeller blades, passes through the impeller and hits the opposite impeller blades again. Due to its simple yet robust design, the cross flow turbine is often used in small hydropower plants. Small hydropower plants are becoming increasingly important with the aim of emission-free energy generation - especially to meet the energy requirements of industrial companies or in the interests of environmental protection in developing countries.In order to evaluate the performance of the cross flow turbine, a numerical flow simulation is carried out in this work. The starting point for this is the geometry data provided for a test flow turbine. Using ANSYS ICEM CFD, the regions are defined and a structured mesh is generated. The meshed model is imported into ANSYS FLUENT and the numerical flow simulation is started. To obtain comparable results, the simulation is performed for three different angular velocities: 20 rad/s, 25 rad/s und 35 rad/s. To perform a realistic simulation, the selection of boundary conditions is of great importance.Based on the simulation results, the water flow through the runner is visualized, the efficiency is determined and the forces acting on the shaft are determined. Finally, the values obtained from the flow simulation are plotted on the turbine's Hill Chart and the results are compared.

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Angeliki Sitara; orcid Rémi Hocq;
    Rémi Hocq
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    Rémi Hocq in OpenAIRE
    Josef Horvath; orcid bw Stefan Pflügl;
    Stefan Pflügl
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    Derived by OpenAIRE algorithms or harvested from 3rd party repositories

    Stefan Pflügl in OpenAIRE

    Transitioning away from fossil feedstocks is imperative to mitigate climate change, and necessitates the utilization of renewable, alternative carbon and energy sources to foster a circular carbon economy. In this context, lignocellulosic biomass and one-carbon compounds emerge as promising feedstocks that could be renewably upgraded by thermophilic anaerobes (thermoanaerobes) via gas fermentation or consolidated bioprocessing to value-added products. In this review, the potential of thermoanaerobes for cost-efficient, effective and sustainable bioproduction is discussed. Metabolic and bioprocess engineering approaches are reviewed to draw a comprehensive picture of current developments and future perspectives for the conversion of renewable feedstocks to chemicals and fuels of interest. Selected bioprocessing scenarios are outlined, offering practical insights into the applicability of thermoanaerobes at a large scale. Collectively, the potential advantages of thermoanaerobes regarding process economics could facilitate an easier transition towards sustainable bioprocesses with renewable feedstocks.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Bioresource Technolo...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Bioresource Technology
    Article . 2024 . Peer-reviewed
    License: CC BY NC ND
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Bioresource Technolo...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Bioresource Technology
      Article . 2024 . Peer-reviewed
      License: CC BY NC ND
      Data sources: Crossref
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  • image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Authors: orcid Wei Wu;
    Wei Wu
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    Wei Wu in OpenAIRE
    orcid Taha Ashour;
    Taha Ashour
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    Taha Ashour in OpenAIRE
    Sinan Korjenic; orcid Azra Korjenic;
    Azra Korjenic
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    Azra Korjenic in OpenAIRE

    Abstract Energy-efficiency of sustainable constructions and buildings are evaluated based upon the heating and cooling demands, but also according to the primary-energy demand, CO2 savings potential, and the ecological properties of building materials. To meet increasingly rigorous requirements, the demand for natural building materials is growing rapidly. The research objective of the here presented study is to stabilize soils with natural straw fibres to produce a composite, sustainable, non-toxic and locally sourced building material. The material appropriateness was determined by establishing the thermal conductivity of a selection of unfired earth bricks that were identified as potential new natural building materials. The thermal conductivity is an essential material characteristic to achieve the required insulation level and for market success as a new product. The earth bricks consist of soil, cement, gypsum and straw fibres. Straw was applied as fibre reinforcement for unfired bricks. Two fibre types were used: wheat and barley straw. The results indicated that the thermal conductivity of all investigated variants decreased with increasing fibre content while increasing with higher cement and gypsum contents. They also show that barley straw fibre reinforced bricks exhibited the highest thermal insulation values. The addition of fibre positively improves both, thermal and static properties.

    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Energy and Buildingsarrow_drop_down
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Energy and Buildings
    Article . 2015 . Peer-reviewed
    License: Elsevier TDM
    Data sources: Crossref
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      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Energy and Buildingsarrow_drop_down
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Energy and Buildings
      Article . 2015 . Peer-reviewed
      License: Elsevier TDM
      Data sources: Crossref
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