Abstract
Abstract—Experiments were conducted to determine the required hydrophile lipophile balance (HLB) for carrying out emulsification of biodiesel blend JB10 emulsified with water by 10% and 15% volume basis. The performance and emissions of a 10.3 kW, single cylinder, 4-stroke, water cooled, direct injection (DI) diesel engine were studied at different engine loadings when operated with emulsified biodiesel fuel and compared with those when operated with diesel (HSD) and biodiesel blend (JB10). The results showed that JB10 and its emulsified fuel exhibited similar combustion stages as that of HSD and no undesirable combustion features such as unacceptable high rate of rise of cylinder gas pressure were observed. Ignition delay was longer with increasing percentage of water in the emulsified fuel at higher engine loads. Brake specific fuel consumption (BSFC) decreased while brake thermal efficiency (BTE) increased with increase in proportion of water in the emulsified fuel for all engine loadings. Emulsified fuel with 15% water had same BSFC as that of HSD and JB10 for all engine loadings. However, BTE of emulsified fuel decreased by 7-8% as compared to HSD and JB10. Reduction (30-50%) in emissions of CO, CO2 and NOx was observed for emulsified fuel as compared to JB10 and HSD. Hence, emulsified biodiesel JB10 with water can be recommended for long run use in diesel engine in place of biodiesel alone for lesser environmental pollution.
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