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Compression ratio effect on Diesel Engine working with Biodiesel (JOME)-Diesel blend as fuel

Author Affiliations

  • 1Department of Mechanical Engineering, Kakatiya Institute of Technology and Science, Warangal- 506015, Telangana, INDIA

Res.J.chem.sci., Volume 5, Issue (7), Pages 45-47, July,18 (2015)


Continuous increase of energy demand in domestic and industrial sectors increases the pollution problems due to huge usage of fossil fuel. To overcome this problem it is necessary to develop an alternate and renewable source of energy which has less impact on environmental pollution. The wide varieties of plant based vegetable oils available are suitably converted to use in diesel engines as an alternative fuel. In this paper an attempt has been made to investigate the effect of compression ratio (CR) on performance characteristics of diesel engine with 20% Jatropha oil methyl ester (JOME) mixed with 80% diesel to form as B20D80 blend fuel (BF). Experiments were conducted on a variable compression ratio (VCR) engine at compression ratio of 14, 16, 18 and 20 for BF and at 14 and 20 for diesel fuel to compare the results. The performance parameters like brake thermal efficiency, BSFC, volumetric efficiency, CO, CO HC, NO and smoke intensity were measured and analyzed. It was observed that the increase in compression ratio, performance of engine increased appreciably with less BSFC for blend fuel. From the emission results, it was also observed that CO, HC, NO and smoke density reduces significantly but a slight increase in CO as the compression ratio increases.


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