A study on the performance and emission of diesel engine with Jatropha
biodiesel and its blends at different engine load
Abstract
An experimental study has been done to examine the performance and
emission of a diesel engine using different blend ratios of Jatropha oil
methyl ester at different engine speeds. At each speed, the engine was
operated at no load, quarter, half, three quarters, and full load for
different blending ratios. The performance parameters evaluated include
Brake Power (BP), Brake Mean Effective Pressure (BMEP), brake specific
fuel consumption (BSFC), air to fuel ratio (AFR), excess air factor,
brake thermal efficiency, volumetric efficiency and the temperature of
exhaust gas whereas exhaust emissions include specific emissions of O2,
CO, CO2, and NOx. Biodiesel blends result in a decrease of brake power
by 30.8 %, decreases in air to fuel ratio by 18 %, decreases in brake
thermal efficiency by 21 %, decreases in volumetric efficiency by 10.7
% and increases in brake specific fuel consumption by 32.18 %.
Specific emission of O2, CO, and NOx increases with increasing the
percentage of biodiesel in fuel blends. Specific emission of CO2
decreases with increasing the rate of biodiesel in fuel blends. The
results suggest that biodiesel obtained from non-edible oil like
Jatropha could be a decent substitute to diesel fuel in the diesel
engine.