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STATISTICAL ANALYSIS ON THE PERFORMANCE OF ENGINE WITH JATROPHA OIL AS AN ALTERNATE FUEL

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Author(s): V.R. Sivakumar, | V.Gunaraj, | P.Rajendran, | V.Vel Murugan

Journal: International Journal of Engineering Science and Technology
ISSN 0975-5462

Volume: 2;
Issue: 12;
Start page: 7740;
Date: 2010;
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Keywords: Mathematical Models. Central Composite rotatable Design | Jatropha curcas oil Brake thermal Efficiency. Specific fuel consumption

ABSTRACT
The rapid depletion in world petroleum reserves and uncertainty in petroleum supply due to political and economical reasons, as well as, the sharp escalation in petroleum prices, have stimulated the search for alternatives to petroleum based fuels specifically diesel and gasoline. Moreover, bulks of petroleum fuels are being consumed by agriculture and transport sector for which diesel engine happens to be the prime mover. Vegetable oils - due to their properties being close to diesel fuel may he a promising alternative for its use in diesel engine, But, their high viscosity prevents them from using it directly in an engine. Present investigation focuses on the use of Jatropha curcas seed based oil as fuel in diesel engine by blending it with diesel for dilution of viscosity and preheating it for reduction of viscosity. Performance tests were conducted on a single cylinder diesel engine and 'important characteristics of the engine such as Brake Thermal Efficiency (BTE) and Specific fuel consumption (SFC) have been evaluated. In this study, the statistical experimental method of four-factors, five-level factorial central composite rotatable design has been used to develop mathematical models to correlate fuel parameters with specific fuel consumption and Brake Thermal Efficiency of an engine. Direct and interaction effects of fuel parameters on engine performance were analyzed andpresented in the graphical form. Further, these mathematical models help to optimize the engine performance. From the test results it has been established that 20% of jatropha oil blend with preheating to a maximum temperature of 47 0C can be a better substitute for diesel without any engine modification.
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