Study of fuel consumption when introducing DME or ethanol into diesel engine
Study of fuel consumption when introducing DME or ethanol into diesel engine
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DOI：
10.1016/j.fuel.2005.08.042
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发表时间：
2006-03
期刊：
影响因子：
7.4
通讯作者：
Z. Bo;Wei-Biao Fu;Jing-Song Gong
中科院分区：
文献类型：
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作者：
Z. Bo;Wei-Biao Fu;Jing-Song Gong
在一台四冲程单缸直喷柴油机上进行了燃用二甲醚和乙醇对燃油消耗率影响的试验研究。首先将DME或乙醇加热热解，然后将所得产物气体引入进气口。柴油机燃用乳化燃料（柴油与水乳化），二甲醚（DME）加热到1000K左右后进入进气道，可以大幅度降低制动比油耗（BSFC）。结果表明，柴油机燃油消耗率可降低约10%，柴油机燃油消耗率可降低约18%。用乙醇代替二甲醚，燃料消耗率可达10%以上。为了实现高的燃料节省率，二甲醚的加热温度需要在1000K左右，而柴油机的排气温度在750K左右就足以热解乙醇。二甲醚或乙醇裂解产生的氢气被认为是优异的燃料节省的主要原因。本工作所采用的技术非常容易实施，可首先在电站、火车、船舶等柴油机上采用。
An investigation of the effect of DME or ethanol on fuel consumption is conducted in a four-stroke, one-cylinder, direct-injection diesel engine. DME or ethanol is first heated to pyrolyze and then the resultant product gas is introduced into air intake. Brake Specific Fuel Consumption (BSFC) can be reduced a lot, when emulsified fuel (diesel fuel emulsified with water) is fueled to diesel engine and DME is heated to about 1000K before its being introduced into air intake. Results show that BSFC can be decreased by about 10% and diesel fuel consumption can be decreased by 18%. High saving rate of BSFC up to 10% is also acquired using ethanol instead of DME. To achieve high saving rate of BSFC, the heating temperature of about 1000K is needed for DME operation, while the diesel engine exhaust temperature of about 750K is enough for pyrolyzing ethanol. Hydrogen produced in DME or ethanol pyrolysis is considered as the main reason for the excellent fuel saving. The technique adopted in the present work is extremely easy to utilize, and may be firstly adopted on diesel engines for power plants, trains, ships, etc.