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Öğe Performance and exhaust emissions of a DI diesel engine fueled with waste cooking oil and inedible animal tallow methyl esters(TÜBİTAK, 2011) Altun, ŞehmusThe performance and exhaust emissions of a direct injection diesel engine were experimentally investigated using 2 biodiesel fuels with promising economic perspective, one obtained from inedible animal tallow and the other from waste cooking oils. Inedible animal tallow, which is obtained from a mixture of slaughtered cattle and sheep fats collected from a local slaughterhouse during meat preparation process, was transesterified using methyl alcohol and an alkaline catalyst to produce the inedible animal tallow methyl ester. Biodiesel from waste cooking oil was produced from waste cooking oils and methyl alcohol via a transesterification reaction, and provided by a commercial biodiesel producer. In order to investigate the performance and exhaust emissions, the experiments were conducted at different engine speeds under the full load condition of the engine. The experimental results showed, compared with diesel fuel, that the biodiesel fuels resulted in a reduction in brake torque and in an increase in brake specific fuel consumption. Although both biodiesels caused reductions in carbon monoxide (CO), the NOx emissions were higher for waste cooking oil biodiesel and lower for inedible animal tallow biodiesel as compared to diesel fuel.Öğe Life-cycle environmental footprint analysis of electricity generation technologies(Batman Üniversitesi, 2019-05-23) Balo, Figen; S.Sua, LutfuIncreasing urbanization and global population, in addition to huge economic and industrial developments have jointly led to raised consumption of electrical. With the rise in fossil-based fuel costs and the environmental awareness to decrease greenhouse gas emissions there is an increasing requirement to alter away from CO2 emission creating fossilbased fuels to new renewable power resources for electrical generation. By using Life Cycle Assessment, this paper’s scope is to compare and evaluation the chosen environmental effects associated with the electrical generation of the sustainable and the fossil-based system. In this paper, the environmental footprint that obtains from the diverse energy sources’ exploitation/use, either renewable or conventional/fossil in the electrical generation industry, is analyzed. Analysis of the electrical energy generation sectors depended on diverse factors include a potency ecological effect categories’ wide vary. Thus, the energy sources’ diverse life cycle stages used in electrical generation are investigated. The pairwise comparison is presented for the needed data’ derivation. For each of criteria, these comparison is applied for deriving weights of criteria’ significance and alternatives’ relative rankings. Each technology’s ecological effect according to all factors are calculated. Finally, the ecofriendliest and the most environmentally damage technologies are determined.
