Combustion and emission characteristics of ethanol–biodiesel–water micro-emulsions used in a direct injection compression ignition engine
Combustion and emission characteristics of ethanol–biodiesel–water micro-emulsions used in a direct injection compression ignition engine
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DOI：
10.1016/j.fuel.2009.06.029
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发表时间：
2010-05
期刊：
影响因子：
7.4
通讯作者：
D. Qi;Hao Chen;R. Matthews;Y. Bian
中科院分区：
文献类型：
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作者：
D. Qi;Hao Chen;R. Matthews;Y. Bian
本工作旨在研究乙醇-生物柴油-水微乳液在柴油机上的有效利用。在一台单缸直喷式柴油机上进行了纯生物柴油和微乳液燃料的变工况试验。结果表明，与生物柴油相比，微乳液的峰值缸压几乎相同，但在中高负荷时的峰值压力上升率和峰值放热率较高。在低发动机负荷下，微乳液的那些较低。微乳液的燃烧开始比生物柴油晚。对于微乳液，存在稍高的制动比燃料消耗（BSFC），而较低的制动比能量消耗（BSEC）。在高发动机负荷下，用微乳液观察到烟的急剧减少。在发动机负荷范围内，微乳液的氮氧化物（NOx）排放量都略有降低。但在中低负荷时，微乳液的一氧化碳（CO）和碳氢化合物（HC）排放略高于生物柴油。
This work aims on the efficient use of ethanol–biodiesel–water micro-emulsions in a diesel engine. A single cylinder direct injection diesel engine is tested using neat biodiesel and the micro-emulsions as fuels under variable operating conditions. The results indicate that, compared with biodiesel, the peak cylinder pressure of the micro-emulsions is almost identical, and the peak pressure rise rate and peak heat release rate are higher at medium and high engine loads. At low engine loads, those of the micro-emulsions are lower. The start of combustion is later for the micro-emulsions than for biodiesel. For the micro-emulsions, there is slightly higher brake specific fuel consumption (BSFC), while lower brake specific energy consumption (BSEC). Drastic reduction in smoke is observed with the micro-emulsions at high engine loads. Nitrogen oxide (NOx) emissions are found slightly lower under all rang of engine load for the micro-emulsions. But carbon monoxide (CO) and hydrocarbon (HC) emissions are slightly higher for the micro-emulsions than that for biodiesel at low and medium engine loads.