Abstract
The influence of injection opening pressure (IOP) for 20% blend (B20) of mahua oil methyl ester (MOME) and 22.5liters per minute (lpm) of hydrogen dual fuel mode was investigated based on the performance, combustion and emission characteristics of a single cylinder, four stroke, direct injection (DI) diesel engine with a rated power of 3.5kW at a rated speed of 1500rpm. Experiments performed at four different IOP of 200, 225, 250 and 275bar that were compared using the diesel operation at 200bar as the baseline. Maximum brake thermal efficiency, minimum brake specific fuel consumption, and lowest HC, CO and smoke emissions with increased concentration of NOx were obtained at IOP of 250bar for B20-hydrogen dual fuel mode. Further increase in IOP to 275bar results in decreased brake thermal efficiency, increase in HC, CO and smoke emissions whereas the concentration of NOx slightly diminished. Present investigations revealed that the IOP of 250bars for 22.5lpm hydrogen with B20 dual fuel mode is optimum.
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