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A study on the performance and emission of diesel engine with Jatropha biodiesel and its blends at different engine load
  • Ahmed JadoOrcid
Ahmed Jado
Orcid
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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.