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Investigation of the Effect of Sunflower Oil Methyl Esther on the Performance of a Diesel Engine

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The viscosity of raw vegetable oil is rather higher than that of diesel fuel. High viscosity has a negative effect on atomization quality, and so engine performance and exhaust emission are affected badly; this causes failure of engine parts. To decrease viscosity of vegetable oil, methyl ester was produced and tested as an alternative fuel in a single cylinder, four strokes, air-cooled diesel engine. The viscosity of sunflower oil methyl ester obtained after transesterification was reduced considerably and heating value was improved. Engine tests were carried out at full load-different speed range; the engine torque and power of sunflower oil methyl ester was lower than that of diesel fuel in range of 6–18% and specific fuel consumption was higher than that of diesel fuel of approximately 3%. CO 2 , CO and NO x emissions of sunflower methyl ester were lower than that of diesel fuel. The sunflower oil methyl ester fuel was used successfully as alternative fuel in short-term tests.
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Keywords: alternative fuels; bio diesel; diesel fuel; sunflower oil methyl ester

Document Type: Research Article

Affiliations: Firat University, Technical Education Faculty, Elazıg, Turkey

Publication date: October 1, 2005

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