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Öğe Exergy analysis of a spark ignition engine for different crankshaft speeds(2019) Özdalyan, Bülent; Uysal, Cüneyt; Kurt, HüseyinIn this study, a spark ignition (SI) engine performance is exergeticallyinvestigated for different crankshaft speeds. The test engine is VSG413SI type engine fueled with 95 octane gasoline. The test engine has 1.3 lvolume, four stroke, four cylinder, 45 kW maximum power capacity and98 Nm maximum torque capacity. The experiments are realized underfully loaded test conditions. The crankshaft speed is changed between1200 rpm and 5000 rpm. In the calculations, actual operating dataobtained by experiments are used. It is found that maximum energy andexergy efficiencies are obtained at crankshaft speed of 2500 rpm, whichare 29.78% and 27.77%, respectively. Entropy generation rateincreases with increase in crankshaft speed and ranged from 0.059kW/K to 0.253 kW/K for all study.
