• Energy Research
• 2021-2025close
• TR close

The complete data set that was the basis of the article: Stratulat, C.; Ginghina, R.E.; Bratu, A.E.; Isleyen, A.; Tunc, M.; Hafner-Vuk, K.; Frey, A.M.; Kjeldsen, H.; Vogl, J. Development- and Validation-Improved Metrological Methods for the Determination of Inorganic Impurities and Ash Content from Biofuels. Energies 2023, 16, 5221. https://doi.org/10.3390/en16135221 This work is part of the 19ENG09 BIOFMET project. This project has received funding from the EMPIR programme co-financed by the Participating States and from the European Union's Horizon 2020 re-search and innovation programme.

Abstract This study investigates the macroeconomic effects of adverse oil price shocks on a small oil-exporting economy — the Azerbaijan economy. We estimate a recursive (near) VAR model by using monthly macroeconomic data from 2006 to 2018. The results indicate the Azerbaijan economy is adversely influenced by an oil price decline. Specifically, we find that a negative oil price shock deteriorates trade balance, causes a currency depreciation, increases inflation and falls economic activity. Furthermore, our findings imply that the oil price-led devaluation shapes the inflationary and recessionary consequences of this shock.

Floods are among the most devastating disasters in terms of socio-economics and casualties. However, these natural disasters can be managed and their effects can be minimized by flood modeling performed before the occurrence of a flood. In this study, flood modeling was developed for the Göksu River Basin, Mersin, Türkiye. Flood hazard and risk maps were prepared by using GIS, HEC-RAS, and HEC-HMS. In hydraulic modeling, Manning’s n values were obtained from 2018 CORINE data, return period flow rates (Q25, Q50, Q100, Q500) were obtained from HEC-HMS, and the application was carried out on a 5 m resolution digital surface model. In the study area, the water depths could reach up to 10 m, and water speeds were approximately 0.7 m/s. Considering these values and the fact that the study area is an urban area, hazard maps were obtained according to the UK Department for Environment, Food and Rural Affairs (DEFRA) method. The results indicated that possible flood flow rates from Q25 to Q500, from 1191.7 m3/s to 1888.3 m3/s, were detected in the study area with HEC-HMS. Flooding also occurred under conditions of the Q25 flow rate (from 4288 km2 to 5767 km2), and the impacted areas were classified as extremely risky by the DEFRA method.

East Lisbon is being exposed to large-scale urban regeneration processes, where luxury residential projects and mixed-use spatial developments are already underway. Thus, it is a living laboratory for “smart”, “creative” and “green” projects, as well as related urban public space interventions. Braço de Prata is an urban space overlooked by developers, being surrounded by obsolete industrial buildings. Concerning the recent interest in international investments in brownfield regeneration and greenfield developments, it represents an attractive urban terrain as a post-industrial working-class neighbourhood, where “smart” and “green” suggest transforming space so that both new and old residents can live and work together and share public space regardless of analysis on their environmental recognitions. The aim of this paper is to present an empirical evaluation model that examines the possible impacts of environmental negligence through the reorganisation of the physical and social fabric. The analyses focus on dwellers’ moral understanding of their changing environment as site-specific domains to address the unique conditions that affect transiently defined presumptions about the collective needs. Taking an evaluative approach in the Braço de Prata case, this paper demonstrates the specific socio-ecological implications of urban inequality in post-industrial neighbourhoods that could be threatened by new decisions, both through urban planning approaches and instruments.

This paper is concerned with the risk management practices of an electricity retailer motivated by the Dutch electricity market. We examine the effectiveness of the existing base- and peak-load futures contracts as a risk management tool for the electricity retailers. We analytically characterize the retailer’s optimal hedging policy as a function of the serial correlation of the prices and the demand profiles of its customers. We find that the retailer typically over-hedges in the futures market, and the over-hedging amount increases when both base- and peak-load contracts are used. Our findings indicate that although the existing contracts in the futures market are quite efficient to replicate the exposure from profiled customers, when industrial consumers and renewable generation are included to the retailer’s portfolio, the effectiveness of such contracts decreases substantially. In our motivating example, hedging the risk of the profiled customers with base-load contracts, the firm may reduce the variance of its cash flows by 85.9%. In addition to the base-load contracts, including peak-load contracts into the hedging portfolio of the retailer increases the efficiency of hedging to 89.3%. However, when we consider the aggregate portfolio of the retailer including profiled customers, industrial consumers and renewable contracts, the efficiency of hedging through the existing futures contracts goes down as low as 32.8% during certain periods. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

Sürdürülebilir Kalkınma Amaçları (SKA’lar), dünyanın karşı karşıya kaldığı çevresel, ekonomik ve sosyal sorunlarla mücadele edilmesine yardımcı olmak üzere Birleşmiş Milletler (BM) tarafından 2015 yılında kabul edilen amaç ve hedeflerden oluşmaktadır. Yüksek denetim kurumları (YDK’lar), sürdürülebilir kalkınma için etkili, hesap verebilir, şeffaf, etkin ve kapsayıcı kurumların merkezinde yer almakta olup bireysel yetki ve görevleri çerçevesinde SKA’ları takip eder ve gözden geçirirler. Sürdürülebilir kalkınmanın öneminin artması ile YDK’lar, çevreye ve çevre politikasına karşı rol ve sorumluluklarının farkına varmış ve çevre denetimi, YDK’ların denetim faaliyetlerinin önemli bir parçası haline dönüşmüştür. Çalışma YDK’ların çevre denetimini SKA’lar çerçevesinde ele almayı amaçlamakta olup çevre denetiminin SKA’lara nasıl katkıda bulunabileceğini incelemektedir. Bu kapsamda sürdürülebilir kalkınma ve YDK’lar arasındaki ilişkiye ilişkin literatürden, Çevre Denetimi Çalışma Grubu (Working Group of Environmental Auditing - WGEA) tarafından yayımlanan anket bulgularından ve YDK’ların denetim raporlarından yararlanarak konuya ilişkin yeni değerlendirmelerde bulunulmuştur. Çalışmada çevre denetiminin SKA’lara ulaşılmasına olumlu katkı yapabileceği, YDK’ların gözetim işlevlerini kullanarak SKA’ların uygulanması konusunda mali kaynakların etkin, etkili ve şeffaf harcanmasını teşvik edebileceği ve bu anlamda hükümetleri sorumlu tutabileceği ve bağımsız bilgiler sağlayabileceği belirlenmiştir.

With the increasing need for energy in the world, the demand for renewable energy sources is increasing day by day. This increase in energy need directs governments and private sector investors to renewable energy sources. Wind energy is one of the most important renewable energy resources on earth. In recent years, the share of wind energy in the amount of energy produced by renewable energy sources has been increasing. Wind energy emerges as a sustainable energy source due to its environmental friendliness and ability to renew itself. These features of wind energy have a great effect on the increase of its share in the energy sector. In order to get the highest efficiency from wind energy, the correct positioning of wind farms, that is, the concept of site selection is very important. One of the most important parameters in site selection of wind farms is the wind energy source and the wind speed accordingly. In order to create wind speed maps, wind speed data obtained from a certain number of stations should be interpolated for the study area. In this study, wind speed data obtained from 32 meteorology stations in Balikesir province were used. With the help of these data, wind velocity maps were created with five different interpolation methods, namely IDW, Kriging, Natural Neighbor, Spline and Trend, within the borders of Balikesir province. Finally, the results obtained by these five methods were compared with the real wind speed values according to root mean square error and evaluations were made.

Data collected for the manuscript titled "Sustainability in Street Food: Elaboration Likelihood Model (ELM) and Image Theory Perspective". Data collected for the manuscript titled "Sustainability in Street Food: Elaboration Likelihood Model (ELM) and Image Theory Perspective".

Bioenergy is considered a sustainable substitute to fossil-fuel resources and the development of a prudent combination of renewable and innovative conversion technologies are essential for the valorization and effective conversion of biowaste to value-added commodities. Here, a negative pressure-induced carbonization process was proposed for the valorization of lignin-enriched biowaste precursor to bio-oil and environmental materials (biochar) at various temperatures. The high heating values (HHV) of the as-prepared biochars from the lignin enriched precursor under negative pressure (low-medium vacuum) were within 25.9-31.5 MJ/kg, which matched satisfactorily to the commercial charcoal. Whereas, the bio-oils produced from the lignin enriched precursor under vacuum conditions was a blend of complex aromatic and straight-chain hydro-carbons, including aldehyde, ketone, phenol, and furans, exhibiting ability as potential heating-oil with HHV within 21.2-28.2 MJ/kg. Moreover, the biochars produced under vacuum environments at higher temperature showed greater stability (22.5-35.9%) than those produced under N2 atmosphere.