Effect of Oxygenated DEE Additive to Ethanol and Diesel Blend in the Context of Performance and Emissions Characteristics of CI Engine

摘要

An experimental investigation has been carried out to evaluate the effects of oxygenated cetane improver Diethyl ether (DEE) as additive to optimum ethanol-diesel blend on the performance and emission characteristics of a direct injection diesel engine. The DEE with 5%, 8%, 10% and 15% (by volume) are blended into optimum 10% ethanol-diesel blend. The engine tests are carried out at 25%, 50%, 75% and 100% of full load for all test fuels. The laboratory fuel tests show that the DEE is completely miscible with diesel and ethanol in any proportion. The concentration of DEE in the DEE-ethanol-diesel blends increases the oxygen content, cetane number and reduces the density, kinematic viscosity and calorific value. The experimental results of DEE-ethanol-diesel blends at full load condition show that the BTE of DE8E10D is improved by 15%; the smoke and NOx emissions of DE15E10D are reduced by 6.25% and 36% respectively; while the CO and HC emissions are increased by 43% and 42% respectively as compared to neat diesel. It has reduced the trade-off between smoke and NOx. The optimum performance blend ratio found is DE15E10D without any modifications in the engine.