Yazar "Bozkurt, Ismail" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    A comparative review of ORC and R-ORC technologies in terms of energy, exergy, and economic performance
    (Elsevier Ltd, 2024) Damarseckin, Serdal; Junior Kane, Sebe Yves; Atiz, Ayhan; Karakilcik, Mehmet; Sogukpinar, Haci; Bozkurt, Ismail; Oyucu, Saadin
    This review examines Organic Rankine Cycle (ORC) technology, which generates electricity using organic fluids at low temperature ranges. To enhance the efficiency of basic ORC systems, they are often adapted into Regenerative Organic Rankine Cycle (R-ORC) systems. The review highlights the dimensions of economic, energy, and exergy efficiency, which are critical for practical application. Factors like the choice of working fluid, heat source temperature, and heat exchanger efficiency significantly affect economic feasibility; suboptimal choices can reduce returns and hinder project viability. Strategic decisions can improve economic outcomes and make ORC technology more appealing, as improved efficiency often leads to better economic performance through increased energy output and reduced operational costs. ORC and R-ORC systems promote sustainable energy production by enhancing energy efficiency in various applications, including geothermal power plants, industrial waste heat recovery, biomass energy production, and solar power plants. By enabling electricity generation even at low temperatures, these systems efficiently utilize existing energy sources, reduce dependence on fossil fuels, and minimize environmental impacts, thus providing both economic and ecological benefits. Additionally, when the studies conducted are examined, R-ORC exhibits higher performance than basic ORC. R-ORC is significantly superior to ORC in terms of both energy and exergy efficiency. Specifically, in terms of energy efficiency, R-ORC has been found to be 1.83 %–25.5 % more efficient. Regarding exergy efficiency, R-ORC demonstrates approximately 7.69 % better performance. Furthermore, due to these increases in efficiency, it has been determined that R-ORC also provides a more positive economic contribution compared to ORC. Thus, comparisons between ORC and R-ORC systems play a significant role in sustainable energy production and offer valuable guidance for future research. The limitations of ORC and R-ORC systems include limited efficiency due to low temperature differentials, the environmental impact of the organic fluids used, and high costs. © 2024 The Authors
  • Küçük Resim Yok
    Öğe
    The strategy food waste in restaurants: A systematic literature review
    (Elsevier Science London, 2024) Kaman, Gizem Sultan; Bozkurt, Ismail; Bolukbas, Rabia; Ozhasar, Yunus; Demirci, Baris; Yazicioglu, Irfan
    This study critically analyzes the literature on food waste in restaurants. Through a systematic literature review approach based on the evaluation and synthesis of articles, existing gaps in the literature and key research directions for the future research agenda were identified. Thematic analysis was applied to organize the selected articles around five themes representing various aspects of food waste. The themes ranged from food waste in restaurants' operational processes to best practices. Accordingly, it was found that the increase in empirical research has brought both new findings and new problems concerning food waste at the end-consumer level in restaurants. Consumer research on plate waste at the end-consumer level and the type of food on the plate, as well as on doggy bags and their use as one of the good practices, require a special emphasis on responsible production and consumption and good practices in line with sustainable development goals.
  • Küçük Resim Yok
    Öğe
    Unveiling the wind energy future of Türkiye with policies technologies and potential
    (Elsevier Ltd, 2025) Sogukpinar, Haci; Bozkurt, Ismail; Oyucu, Saadin; Aksoz, Ahmet
    Türkiye has set ambitious renewable energy targets aligned with the European Union Green Deal, aiming for 55 % renewables by 2035 and finally, zero-emission by 2050 so for this target a total installed capacity of 120 GW in wind and solar energy by 2035. In line with Türkiye's target of 120 GW of installed power in wind and solar energy by 2035, the sector aims to invest 5 GW of wind annually. This target will ensure that all wind investments to be put into operation in Türkiye by 2035 will reach a total of 50 GW and the wind-generated electricity will reach 138 TW-hours per year. As of the end of 2024, the total installed power has reached 13 GW and new installations continue rapidly. The wind potential of Türkiye is 118,683 MWe for wind speeds of over 6.8 m/s at a height of 50 m and the total WEP (Wind Energy Potential) of Türkiye is 48,000 MWe for regions with wind speeds of over 7 m/s. Offshore wind potential is calculated as 17,393 MWe, and these data are excluded from the land wind potential. Preparations for offshore wind power plants are ongoing, with an installation target of 5000 MWe for 2035. This study reviews Türkiye's wind energy potential, the evolution of its installations, and the policies driving this growth, concluding with recommendations for achieving its ambitious targets. © 2025 The Authors