Exergy and Energy Analysis of Diesel Engine Fuelled with Diesel and Diesel – Corn Oil Blends

Abstract

Exergy and energy analysis of diesel engine fuelled with pure diesel and diesel – corn oil blends are the focus of this study. The analyses were carried out by using the results of experiments of fuels for different engine speeds. The obtained results revealed that the input exergy and energy of diesel – corn oil blends were lower than of that of conventional diesel at the same conditions. The exergy destruction is the major fraction of fuel exergy lost. Moreover, the exergy destruction increases with an increased engine speed for both conventional and diesel – corn oil blends. The destructed exergy of the test engine operating on diesel – corn oil blends was higher than that of conventional. It has been determined that exergertic efficiency and thermal decreases as the diesel – corn oil blends content in fuel increase so the highest values of exergertic efficiency and thermal efficiency were obtained for the diesel fuel. It was also observed that the exergertic efficiency value is lower than that of the thermal efficiency under the same conditions. Results also showed the diesel – corn oil blends can be used as a substitute for diesel fuel.