Evaluation of the performance and emissions of a single cylinder diesel engine fueled by biodiesel and using EGR

Abstract

In this study, the effect of using biodiesel – derived from waste cooking oil – and exhaust gas recirculation (EGR) on engine performance and emissions of a single cylinder 4-stroke engine has been investigated. Three engine speeds (1800, 2100 and 2400 rpm), three engine loads (25, 50 and 75 %), four biodiesel/diesel blend (B0, B5, B10 and B15) and four EGR rates (0, 10, 20 and 30 %) have been applied to the engine. The considered emissions of the engine, measured at exhaust, were , CO, CO₂, HC and smoke. The considered performance parameters were engine power, exhaust gas temperature and brake specific fuel consumption. The results of the study show that the addition of the biodiesel to the diesel fuel increases emission of the engine. The highest decrease in emissions while using the biodiesel and EGR has been 63.76% with B10 fuel blend and 30% EGR rate. Therefore, it can be stated that, using EGR, the increase in emissions of the engine due to biodiesel can be reduced. The simultaneous usage of EGR and biodiesel reduced CO emission of the engine of 4.04, 12 and 1.73% for low, medium and high engine speed. The biodiesel decreased the HC emission of the engine and so it compensated the increase of HC due to EGR. The highest reduction in HC emission levels while using EGR and biodiesel simultaneously, has been 54.05%. It is noticeable that the total amount of the smoke emission levels while using EGR and biodiesel did not change considerably.