Performance characteristics of non-edible Jatropha oil with adjustable compression ratios

Abstract

Non-edible biodiesel extracted from jatropha oil is broadly studied to solve the twin problem of reduction of fossil fuels and environmental degradation. The present study is conducted on unmodified variable compression ratio (VCR) diesel engine for exploring the effect of biodiesel blends. The performance characteristics of Jatropha oil are compared with diesel fuel at two compression ratios 17 and 18. The viscosity and density are 23% and 3.9% higher with respect to diesel for pure jatropha methyl ester and calorific value is lower for J100, 6.8% with respect to diesel. Performance and emission have been observed better when compression ratio increases from 17 to 18 and also notice that the hydrocarbon (HC) and carban monoxide (CO) emission reduced but corban dioxide CO2 and NOX emission increases.