Atık Kızartma Yağı Biyodizeliyle Çalışan Direkt Enjeksiyonlu Bir Dizel Motorun Yanma Performans ve Emisyon Özellikleri

Abstract

In the current study, combustion, engine performance and exhaust emissions of a direct injection diesel engine fuelled with the blends of 50% waste frying oil biodiesel - 50% diesel fuel and nate waste frying oil biodiesel were investigated experimentally. Test engine was opareted between 1750 – 3000 rpm engine speed range. Also the test engine was run at 2200 rpm and 3.75, 7.5, 11.25 and 15 Nm engine loads. The variations of in-cylinder pressure, heat release, combustion duration, engine torque and specific fuel consumption were observed. In addition, exhaust emissions were also examined comparatively. While using the blended and nate biodiesel fuels, the in-cylinder pressure increased for all engine loads. At the engine speed where maximum engine torque is obtained, engine torque decreased by 1.63 % and 3.25 %, respectively, when using B50 and B100 fuel compared to diesel fuel. Under the same test conditions, specific fuel consumption worsened by 7.63 % and 15.39 % respectively. While using the biodiesel fuels, combustion duration shortened because of the oxygen content. Under full load conditions, CO emissions were reduced by 24.4 % and 39.37 % respectively when using B50 and B100 fuels. Under the same conditions, NOx emissions worsened by 29.4 % and 50.45 %. Oxygen content reduced the soot emissions of B50 and B100 fuels by 58.8 % and 69.25 % respectively. As a result, B50 could be easily used without engine modifications in diesel engine.