Experimental Studies on Performance and Emission Characteristics of Fish Oil Methyl Ester and its blends at different injection opening pressures in a direct injection CI engine

摘要

Biodiesel is one of the most versatile alternative fuel options for direct injection CI engine applications. In the recent research of biodiesel in India receives its attention towards fish oil based biodiesel. The present work aimed at production of biodiesel from the fish oil extracted from marine fish species by transesterification process which is used as fuel in direct injection CI engine to evaluate its performance, and emission characteristics at different injection opening pressures of 190bar, 200bar, 210bar. The different blends of fish oil biodiesel with diesel, B10, B20, B30, B40, B50 and B100 were used in the experiments and the results indicate that brake thermal efficiency were higher with B30 blend fuel than that of diesel at 210bar as compared at 190bar and 200bar. The brake specific energy consumption for B30 blend at 210bar shows better results than that of diesel. By considering these two performance parameters B30 blend at 210 bar injection opening pressure is taken as optimum. At full load for B30 fuel at 210bar injection opening pressure the emission results shows that there is increase in NO_x and CO₂ emission but reduction in CO and HC emissions by 20% and 15.55% respectively with reference to diesel fuel.