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    Biomass-fueled organic rankine cycles: state of the art and future trends
    (Multidisciplinary Digital Publishing Institute (MDPI), 2024) Heidarnejad, Parisa; Genceli, Hadi; Hashemian, Nasim; Asker, Mustafa; Al-Rawi, Mohammad
    Biomass-fueled organic Rankine cycles (ORCs) are widely utilized technologies for power production because of their simplicity, low cost, and relatively high efficiencies. Furthermore, raw material availability and topographical independency make these systems preferable to other renewable-fueled power generation systems. A deep and comprehensive understanding of biomass-fueled organic Rankine cycles will provide researchers with a solid foundation to prioritize their investigations and assist future developments in this field. In this regard, feedstocks and their properties, biomass conversion mechanisms, and biomass-fueled power generation systems are discussed in this study. Power generation technologies based on coal and waste as feedstock have been widely investigated in the literature due to higher energy content and technological maturity. Additionally, depending on the type of biomass available, the scale of the power plant, and economic and environmental considerations, the most common technologies utilized for biomass conversion are combustion, gasification, and anaerobic digestion. Finally, the authors investigate various aspects of biomass-fueled organic Rankine cycles, including working fluids, analysis methods, and environmental issues. Since maximizing product yield is key in biomass-based power generation systems, technical assessment of these systems has been a primary focus of many studies. Further research is required on integrated environmental and socio-economic approaches, along with Machine Learning algorithms. Future advancements focusing on integration of feedstock with other renewable energy sources, efficient working fluids like nanofluids, and high-tech heat exchangers will drive the development of biomass-fueled ORC systems.
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    The pandemic's sustainability windfall: a case study of COVID-19 restrictions on electricity demand patterns and sustainable development goals
    (Inderscience Enterprises Ltd, 2024) Heidarnejad, Parisa; Genceli, Hadi; Asker, Mustafa; Yumurtaci, Zehra
    In this paper, the pattern of daily electricity demand mid- and post-pandemic eras relative to 2019 was investigated for Turkey and the total reduction of 9% in electricity demand from April to July 2020 in comparison to the same period in 2019 was monitored. Also, as a result of public behaviour changes, the electric demand of the service sector dropped by about 5.9%, 28.4%, 6.8%, and 5.8% during the first, second, third, and fourth quarters of 2020 in comparison to 2019. The electricity load was transferred from the service sector to the household sector in all four quarters of 2020. Eventually, the phasing out of measures on July 1, 2021, the electricity consumption of the service sector during the second half of the year improved to 31.11 TWh from 3.09 TWh during the same period in 2020. On the other hand, to comprehend the socio-economic effects of the pandemic, the variation of four indicators of sustainable development goals during the last 20 years was assessed and discussed for world, the UAS, OECD countries and Turkey.