Environmental and performance study of a 4-Stroke CI engine powered with waste oil biodiesel

The use of biodiesel as fuel for compression ignition engines in Jordan is gaining more interest. This paper presents a comparative study on the use of new as well as waste oil as source for biodiesel fuel for compression ignition engine. The engine performance and emission characteristics were studied and compared with pure diesel fuel. The results showed that there was a loss in the fuel calorific value of about 13.43% for waste oil biodiesel and 7.24% for unused oil biodiesel. Further, the density of the fuel was found to increase by about 4.75% with respect to pure reference fuel. As for the performance, biodiesel showed improvement in the torque, power and thermal efficiency and reduction in the specific fuel consumption. This was achieved both as full and low load.