Yazar "Uckan, Irfan" seçeneğine göre listele

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    INVESTIGATION OF THE EFFECT OF DEAD-STATE TEMPERATURE ON THE PERFORMANCE OF BORON-ADDED FUELS AND DIFFERENT FUELS USED IN AN INTERNAL COMBUSTION ENGINE
    (Begell House Inc, 2024) Uckan, Irfan; Yakin, Ahmet; Behcet, Rasim
    This study aimed to investigate the exergy variations of five different fuels developed for internal combustion engines. Two of these fuels, i.e., boron-added fuels, were newly developed. In many previous studies, only one dead-state temperature was considered for exergy calculations. However, it is important to note that the deadstate temperature can vary. Therefore, the impact of changing the dead-state temperature on the exergy of the internal combustion engine becomes crucial. In this particular study, the exergy variations of the newly developed boron-added fuels ES12.5 and MS12.5, as well as gasoline blended with ethanol (E12.5), gasoline blended with methane (M12.5), and pure gasoline (B100) were examined. These variations were analyzed at different dead-state temperatures ranging from 273 K to 298 K. This study focused on examining the detailed changes in the exergy of exhaust gases emitted from the combustion process, specifically at the exhaust outlet, with respect to variations in the dead-state temperature. Furthermore, the impact of the dead-state temperature on various parameters commonly used in thermodynamic analyses, including improvement potential, productivity lack, and fuel depletion ratio were investigated. Through analysis, the study revealed significant variations in the exergy of internal combustion engines when the dead-state temperature was altered. These findings emphasized the importance of considering the dead-state temperature as a critical factor in understanding and optimizing the exergic performance of internal combustion engines.
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    Second law analysis of an internal combustion engine for different fuels consisting of NaBH4, ethanol and methanol mixtures
    (Pergamon-Elsevier Science Ltd, 2024) Uckan, Irfan; Yakin, Ahmet; Behcet, Rasim
    This study was carried out to investigate the effects of NaBH4, which is not used as an internal combustion engine fuel in the literature, on system energy and exergy when used in internal combustion engines. In the study, fuels containing oxygen and hydrogen (MSG12.5, EG12.5, ESG12.5 and MG12.5) and pure gasoline (G100) were tested at different engine speeds and the changes in the energy and exergy analyzes of the system were inves-tigated. In the experimental study, the energy and exergy values of gasoline used as fuel were at the highest values with 33.21 kW and 35.62 kW, respectively, while the energy and exergy efficiencies were 27 % and 25 %, respectively. MG12.5 fuel used in the study showed the best performance among all fuels with 38 % energy efficiency and 35 % exergy efficiency. On the other hand, it was seen that boron added ESG12.5 % fuel was the second best fuel with 35 % energy efficiency and 33 % exergy efficiency. Another fuel, boron added MSG12.5 fuel, performed better than gasoline in terms of both energy and exergy efficiency. In addition, it was determined that more than 50 % of the exergy of the fuel entering the system was lost due to exergy destruction and the exergy destruction of the fuels used in the experiments was determined at least in MG12.5, ESG12.5, EG12.5 and G100, respectively.