Investigation of performance, emission and exergy parameters of a compression ignition engine fuelled with ethanol-jatropha biodiesel blend under varying hydrogen strategies

Abstract

This experimental work highlights the superiority of hydrogen fuel on the performance, exhaust emission and exergy parameters of a compression ignition engine fueled with ethanol-jatropha biodiesel blend. The engine is operated at 25%, 50%, 75% and 100% of full load conditions and at a constant speed of 1500 rpm (±5 rpm) for the five different hydrogen injection durations, such as, 1200, 2500, 3700, 4500 and 6000 μs. The results shows that the 10% ethanol + 90% jatropha biodiesel (BE10) slightly improves the performance, emission and exergy parameters of the engine. The small addition of hydrogen, especially for the injection duration 2500 μs, to the BE10 has shown an improvement in brake thermal efficiency (2.09–2.92%), exergetic efficiency (1.85–2.67%), exergy destruction rate (1.72–7.05%) and entropy generation (4.26–9.47%). The increasing hydrogen share into the hybrid blend notably reduces the unburned hydrocarbon, carbon monoxide and particulate matter with slightly higher oxides of nitrogen emissions.