Abstract:
Non-edible filtered high viscous (72 cSt at 40 C) and high acid value (44 mg KOH/gm) polanga (Calophyllum inophyllum L.) oil
based mono esters (biodiesel) produced by triple stage transesterification process and blended with high speed diesel (HSD) were tested
for their use as a substitute fuel of diesel in a single cylinder diesel engine. HSD and polanga oil methyl ester (POME) fuel blends (20%,
40%, 60%, 80%, and 100%) were used for conducting the short-term engine performance tests at varying loads (0%, 20%, 40%, 60%, 80%,
and 100%). Tests were carried out over entire range of engine operation at varying conditions of speed and load. The brake specific fuel
consumption (BSFC) and brake thermal efficiency (BTE) were calculated from the recorded data. The engine performance parameters
such as fuel consumption, thermal efficiency, exhaust gas temperature and exhaust emissions (CO, CO2, HC, NOx, and O2) were
recorded. The optimum engine operating condition based on lower brake specific fuel consumption and higher brake thermal efficiency
was observed at 100% load for neat biodiesel. From emission point of view the neat POME was found to be the best fuel as it showed
lesser exhaust emission as compared to HSD
