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Performance, Emission and Combustion Characteristics of CI Engine Fuelled With Hydrogen

R. SenthilKumar, M. Loganathana E.JamesGunasekaran

Hydrogen is being considered as a primary automotive fuel and as a replacement for conventional fuels. Some of the desirable properties, like high flame velocity, high calorific value motivate to use hydrogen fuel in a dual fuel mode in diesel engine. In this experiment the hydrogen was inducted in the inlet manifold with intake air. The experiments were conducted on a four stroke, single cylinder, water cooled, direct injection (DI), diesel engine at a speed of 1500 rpm. Hydrogen was stored in a high pressure cylinder and supplied to inlet manifold through water and air based flame arrestor. The pressure regulator was used to reduce the cylinder pressure from 140 bar to 2 bar. The hydrogen was inducted with various volume flow rates namely 4lpm, 6lpm and 8lpm respectively by digital volume flow meter. The engine performance, emission and combustion parameters were analyzed at various flow rates of hydrogen and compared with diesel fuel operation. The brake thermal efficiency (BTE) increased and brake specific fuel consumption (BSFC) decreased for hydrogen flow rate of 8lpm as compared to diesel and lower volume flow rate of hydrogen. The hydrocarbon (HC) and carbon monoxide (CO) decreased and the oxides of nitrogen (NOx) increased for higher volume flow rate of hydrogen compared to diesel and lower volume flow rate of hydrogen. The heat release rate and cylinder pressure increased for higher volume flow rate of hydrogen compared to diesel and lower volume flow rate of hydrogen.