Abstract
The influence of diesel/biodiesel blends on engine combustion, performance, and exhaust gas emissions have carried out experimentally at different engine loads and constant speed of 1400 rpm. Volumetric percentage of diesel/biodiesel blends: D70B30 (70% diesel−30% biodiesel), D50B50 (50% diesel−50% biodiesel) and D30B70 (30% diesel−70% biodiesel) were prepared to power a single cylinder diesel engine. The engine results as compared to diesel fuel, show a reduction in the rate of change of CO by 33.8% for D50B50. The slight decrease in maximum cylinder pressure for higher percentage of biodiesel blends due to low calorific value of biodiesel and lower ignition delay. The reduction in HRR for biodiesel blends as compared to diesel fuel. HRR was about 31.7, 52.4 and 63.5 (J/deg) for 10%, 30% and 60% of maximum engine power. The highest reduction in HC emissions concerning diesel fuel was about 4.18% for D30B70. NOx emissions of biodiesel blends were higher than diesel. Exhaust oxygen (EO) emissions for D30B70 was about 0.98% higher than diesel. Exhaust gas temperature (EGT) has observed for all biodiesel blends. Brake specific fuel consumption (BSFC) is increased until it reaches 11.43% for D30B70. A consequent reduction in brake thermal efficiency (BTE) and brake specific energy consumption (BSEC) is observed for all biodiesel blends.
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