Abstract
Demand for energy in transportation, industrial and other energy sectors has led to the huge consumption of fossil fuels. This has directly affected on climatic issues, global warming as well as financial status of a country. In order to reduce these problems biofuels have been used in the engines. The present work reports the performance and emission studies conducted on an engine for W20 (waste cooking oil methyl ester 20% + diesel 80%) blend and P20 (pongamia methyl ester 20% + diesel 80%) blends on volume basis tested on a single cylinder 4-stroke water cooled compression ignition direct injection engine. At 2.2kW engine loading Brake Thermal Efficiency (BTE) for W20 and P20 blends are 2.11% and 5.92% lesser than that of diesel fuel. Brake Specific Fuel Consumption (BSFC) for W20 and P20 blends are 2.386% and 0.198% higher than that of diesel respectively. Exhaust Gas Temperature (EGT) for W20 and P20 blends are 6.89% and 3.44% greater than that of diesel respectively. Carbon Monoxide (CO) emissions for W20 and P20 blends are 0.046%, 0.04% lower, Carbon Dioxide (CO2) emissions for W20 and P20 blends are 0.33% and 0.18% higher than that of diesel respectively. Hydro Carbon (HC) emissions for W20 blend is 56% higher and P20 blend is 12% lower when compared with diesel. Oxides of Nitrogen (NOx) for W20 and P20 blends are 18.87% and 1.72% larger than that of diesel. Therefore, P20 blend fuel is good when compared to W20 blend fuel.
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