Optimization of Water Emulsion in Diesel on the Engine Performance and Emission by Using a CRDI Turbocharged Diesel Engine at Different Load

Abstract

Water-diesel emulsion fuel is potential alternative fuels for a diesel engine is to reduce dependence on fossil fuels and emissions of Nitrogen Oxides (NOx). A study on the effect of using emulsified diesel fuel on the engine performance and emissions of four cylinder turbocharger common rail with direct injection diesel engine was conducted to investigate the engine combustion efficiency and the emissions produced during the process. Two types of emulsified diesel was produced subsequently the fuel was prepared in the proportion of W5D (5%-water, 93%-diesel, 2%-surfactants) and W10D (10%-water, 88%-diesel, 2%- surfactants) by volume with a hydrophilic-lipophilic balance of 10. An experimental investigation was conducted with respect to type of fuel injected, engine speed and engine load. The data from experimental was used to simulate the design of experiment (DOE) by using response surface method (RSM). Engine power, brake specific fuel consumption, brake thermal efficiency, nitrogen oxide, carbon monoxide and carbon dioxide have been investigated. A 6% of water in diesel was found to be optimal values for emulsified diesel operation in the test engine of 50% load at 2733 rpm. The results of this study revealed that at optimal input parameters, the values of the BTE, BSFC, NOx, CO and CO2 were found to be 24.91 kW, 243 g/kWh, 517.08 ppm, 0.714 ppm and 51.3 ppm, respectively.