Performance and Emission Characteristics Evaluation of Hydrogen Enriched Biofueled Engine

Improving fuel economy and reducing greenhouse gas emissions from vehicle sources have been major research themes in recent times. One of the ways to achieve this is to use alternative fuels that can fully or partly replace petroleum-derived fuels using existing internal combustion engine technology so that the benefit from the alternative fuels can be realized immediately without delay. Emission from engine exhaust is series problem for environment point of view. For that search for alternative fuel is encouraged. The main problems with the use of neat vegetable oils in diesel engines are higher smoke levels and lower thermal efficiency as compared to diesel. The problem can be tackled by inducting a gaseous fuel in the intake manifold along with air. In this investigation, hydrogen is used as the inducted fuel. It is expected that, the problems associated with vegetable oil fueled engine like smoke and hydrocarbon emissions can be brought down by supplying hydrogen in small quantities along with air. Experiments were conducted to evaluate the performance emission and combustion parameters in a compression ignition engine primarily fuelled with an emulsion of bio-oil produced from Pyrolysis of biomass source and methyl ester of karanja with different quantities of hydrogen being inducted. The brake thermal efficiency was 27.55% and 32.69% with diesel and WPO-MEK oil without hydrogen operation respectively at full load.