Impact of properties of vegetable oil, bio-diesel, ethanol and n-butanol on the combustion and emissions of turbocharged HDDI diesel engine operating under steady and transient conditions
Impact of properties of vegetable oil, bio-diesel, ethanol and n-butanol on the combustion and emissions of turbocharged HDDI diesel engine operating under steady and transient conditions
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DOI：
10.1016/j.fuel.2015.04.021
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发表时间：
2015-09-15
期刊：
影响因子：
7.4
通讯作者：
Giakoumis, Evangelos G.
中科院分区：
文献类型：
--
作者：
Rakopoulos, Dimitrios C.;Rakopoulos, Constantine D.;Giakoumis, Evangelos G.
目前的工作评估四个非常常见的生物燃料，即植物油的性质的影响（棉籽）或其衍生物（甲酯）生物柴油或乙醇或正丁醇与柴油燃料以各种比例的共混物对全仪表化的六缸四冲程重型直喷（HDDI）"梅赛德斯-奔驰“公交车柴油发动机的燃烧和废气排放的影响，带有后冷器的废气门涡轮增压器，在稳态和瞬态工况下运行。在稳态操作下，排气烟度，氮氧化物（NOx），一氧化碳（CO），和总未燃碳氢化合物（HC）进行了测量和比较与基线操作（与纯柴油）和他们自己。燃料喷射，燃烧室压力，和热释放率（HRR）的图表显示有趣的功能的燃烧机制。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所观察到的发动机行为。关于瞬态发动机操作，三个加速测试的测量值与生物柴油或正丁醇柴油燃料混合物上的发动机燃料进行了检查。该试验台配备了快速响应仪器，以捕捉关键发动机和涡轮增压器变量的变化，如分析图所示，并使用超快速响应仪器对排气NO和烟度进行瞬时测量。再次，这些结果和生物燃料的不同物理和化学性质用于帮助解释发动机的行为。最后，在考虑到影响瞬态工况的非燃料因素的基础上，比较了生物燃料（生物柴油和正丁醇）的特性对稳态工况和瞬态工况下NOx和烟度排放的影响。(C)2015爱思唯尔有限公司版权所有。
The present work evaluates the impact of properties of four very common bio-fuels, viz. vegetable oil (cottonseed), or its derived (methyl ester) bio-diesel, or ethanol, or n-butanol, in blends of various proportions with diesel fuel, on the combustion and exhaust emissions of a fully instrumented, six-cylinder, four-stroke, heavy-duty direct injection (HDDI), 'Mercedes-Benz' bus diesel engine, bearing a waste-gate turbocharger with after-cooler, running under steady and transient conditions. Under steady-state operation, exhaust smoke, nitrogen oxides (NOx), carbon monoxide (CO), and total unburned hydrocarbons (HC) were measured and compared with those of the baseline operation (with neat diesel fuel) and among themselves. Fuel injection, combustion chamber pressure, and heat release rate (HRR) diagrams revealed 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. As regards the transient engine operation, measurements for three accelerations tests were examined with the engine fueled on bio-diesel or n-butanol diesel fuel blends. The test bed was complemented with fast response instruments to capture the development of key engine and turbocharger variables, depicted in analytical diagrams, using ultra-fast response instrumentation for the instantaneous measurements of the exhaust NO and smoke opacity. Again, these results and the different physical and chemical properties of bio-fuels are used to aid the interpretation of the engine behavior. Finally, a comparison is made for the influence of bio-fuels properties (bio-diesel and n-butanol) on the NOx and smoke emissions between steady-state and transient operating conditions, under the recognition of the different non-fuel factors affecting the transient operating schedules. (C) 2015 Elsevier Ltd. All rights reserved.