DefinePK

Abstract

An experimental study is conducted to evaluate the effects of using blends of ethanol with conventional diesel fuel with 10%, 20%, 25%and 30% (by vol) ethanol, on the combustion and emissions of a standard, fully in the method four stroke, air cooled, direct injection (DI) with and without thermal barrier coating. New additive Tetra Methyl Ammonium Bromide allows the splash blending of ethanol in diesel in a clear solution. The objective of this investigation is to first create a stable ethanol-diesel blended fuel with 2% additive and then to generate performance combustion and emissions data for evaluation of differential ethanol content on a single cylinder diesel engine with and without thermal barrier coating. Results show improved performance with blends compared to neat fuel for all conditions of the engine. The effect of ethanol blended diesel fuels on brake specific fuel consumption (BSFC), brake thermal efficiency (BTE), smoke and NOx emission has been investigated. The results indicate that with the increase of ethanol in the blends, smoke reduces significantly, BTE improves slightly and combustion duration decreases and the reduction is still better for coated engine NOx emissions were found to be low for coated engine than the normal engine for the blends.