Influence of properties of various common bio-fuels on the combustion and emission characteristics of high-speed DI (direct injection) diesel engine: Vegetable oil, bio-diesel, ethanol, n-butanol, diethyl ether
Influence of properties of various common bio-fuels on the combustion and emission characteristics of high-speed DI (direct injection) diesel engine: Vegetable oil, bio-diesel, ethanol, n-butanol, diethyl ether
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DOI：
10.1016/j.energy.2014.06.032
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发表时间：
2014-08
期刊：
影响因子：
9
通讯作者：
D. Rakopoulos;C. D. Rakopoulos;E. G. Giakoumis;R. G. Papagiannakis;D. Kyritsis
中科院分区：
文献类型：
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作者：
D. Rakopoulos;C. D. Rakopoulos;E. G. Giakoumis;R. G. Papagiannakis;D. Kyritsis
本文研究了几种常用生物燃料的特性对单缸四冲程高速直喷式“九头蛇”柴油机在三种不同负荷下的燃烧、性能和排放的影响。研究了棉籽植物油或其衍生的(甲酯)生物柴油、乙醇、正丁醇或二乙醚与柴油的各种混合燃料。测量了燃油消耗量、排气温度、排气烟度、氮氧化物(NOx)、一氧化碳(CO)和未燃烧碳氢化合物(HC)总量。比较了不同生物燃料混合燃料与柴油机(纯柴油)运行时的燃烧、性能和排放的差异。燃油喷射、燃烧室压力和热释放率(HRR)图揭示了燃烧机制的有趣特征。这些结果和这些生物燃料的不同物理和化学性质被用来帮助解释观察到的发动机行为。随着所有生物燃料在混合燃料中所占比例的增加，除植物油外，烟度显著降低，NOx减少，CO和HC排放与相应的纯柴油相比表现出混合行为。
This work evaluates the influence of properties of various common bio-fuels on the combustion, performance and exhaust emissions of an experimental, single-cylinder, four-stroke, high-speed, DI (direct injection) ‘Hydra’ diesel engine operated at three different loads. Various blends of diesel fuel with either vegetable oil of cottonseed or its derived (methyl ester) bio-diesel, or ethanol, orn-butanol, or diethyl ether were investigated. Fuel consumption, exhaust gas temperature, and exhaust smoke, NOx(nitrogen oxides), CO (carbon monoxide) and total unburned HC (hydrocarbons) were measured. The differences in combustion, performance and exhaust emissions of those bio-fuels blends from the baseline operation of the diesel engine (with neat diesel fuel) and among themselves are compared. Fuel injection, combustion chamber pressure, and HRR (heat release rate) diagrams reveal interesting features of the combustion mechanisms. These results and the different physical and chemical properties of those bio-fuels are used to aid the interpretation of the observed engine behavior. With increasing percentage of all bio-fuels in the blends, significant reduction of smoke opacity is observed with the exception of the vegetable oil case, reduction of NOx, and mixed behavior for the CO and HC emissions against the corresponding neat diesel fuel case.