Author(s): Vasudeva M, Sharma S, Mohapatra SK, Kundu K
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Abstract As a substitute to petroleum-derived diesel, biodiesel has high potential as a renewable and environment friendly energy source. For petroleum importing countries the choice of feedstock for biodiesel production within the geographical region is a major influential factor. Crude rice bran oil is found to be good and viable feedstock for biodiesel production. A two step esterification is carried out for higher free fatty acid crude rice bran oil. Blends of 10, 20 and 40 \% by vol. crude rice bran biodiesel are tested in a variable compression ratio diesel engine at compression ratio 15, 16, 17 and 18. Engine performance and exhaust emission parameters are examined. Cylinder pressure-crank angle variation is also plotted. The increase in compression ratio from 15 to 18 resulted in 18.6 \% decrease in brake specific fuel consumption and 14.66 \% increase in brake thermal efficiency on an average. Cylinder pressure increases by 15 \% when compression ratio is increased. Carbon monoxide emission decreased by 22.27 \%, hydrocarbon decreased by 38.4 \%, carbon dioxide increased by 17.43 \% and oxides of nitrogen as NOx emission increased by 22.76 \% on an average when compression ratio is increased from 15 to 18. The blends of crude rice bran biodiesel show better results than diesel with increase in compression ratio.
This article was published in Springerplus
and referenced in Advances in Automobile Engineering