Experimental investigation on thermal barrier coated diesel engine fueled with diesel-biodiesel-ethanol-diethyl ether blends

Abstract

In the present work, diesel-biodiesel-ethanol (DBE) and diesel-biodiesel-diethyl ether (DBD) fuels are tested with normal diesel engine and the diesel engine coated with the layers of aluminum oxide (Al2O3) of 0.3 mm and yttria-stabilized zirconia of 0.2 mm. The various performance and emission parameters are analyzed and determined. The experimental work was carried out in a single cylinder water cooled engine coupled with eddy current dynamometer. The AVL make five gas analyzer and smoke meter were used to measure the different exhaust pollutants. The result shows that the brake thermal efficiency of coated engine is more than that of base diesel at high loads. The thermal barrier coated engine using fuel as diesel, biodiesel, and ethanol (TDBE) produces the lowest carbon monoxide (CO) emissions among all the fuels that are selected. In addition, it produces the lowest carbon dioxide (CO2) at higher loads. Both the thermal barrier coated engine using fuel as diesel, biodiesel, and diethyl ether (TDBD) and TDBE have higher NOx emissions among almost all the fuels used. The TDBE and TDBD have higher smoke emissions at initial loads but eventually show lower smoke emissions at higher loads. The thermal barrier coated diesel engine fueled with DBE and DBD shows an increase in engine power and specific fuel consumption, as well as significant improvements in exhaust gas emissions except NOx.