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首页> 外文期刊>Energy Conversion & Management >Experimental investigation of performance, exhaust emission and combustion parameters of stationary compression ignition engine using ethanol fumigation in dual fuel mode
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Experimental investigation of performance, exhaust emission and combustion parameters of stationary compression ignition engine using ethanol fumigation in dual fuel mode

机译：双燃料模式乙醇熏蒸固定式压燃式发动机性能，废气排放和燃烧参数的实验研究

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Dwindling reserves and steeply increasing prices of the fossil-fuels, concern over climatic change due to release of anthropogenic greenhouse gases and the strict environmental regulations have motivated the researchers for the search for renewable alternative fuel that has clean burning characteristics and may be produced indigenously. Alcohols, being oxygenated fuel improve the combustion and reduce greenhouse gas emissions, thus enhancing agrarian economies and encouraging national economy as a whole. The objective of this paper is to investigate the thermal performance, exhaust emissions and combustion behaviour of small capacity compression ignition engine using fumigated ethanol. Fumigated ethanol at different flow rates is supplied to the cylinder during suction with the help of a simplified low cost ethanol fuelling system. With ethanol fumigation, brake thermal efficiency decreased upto 11.2% at low loads due to deteriorated combustion, whereas improved combustion increased efficiency up to 6% at higher loads, as compared to pure diesel. Maximum reduction of 22%, 41% and 27% respectively in nitrogen oxide, smoke and carbon-di-oxide emissions with simultaneous increase in hydrocarbon and carbon mono-oxide emissions upto maximum of 144% and 139% respectively for different rates of ethanol fumigation have been observed, when compared to pure diesel operation. This is due to the changes in physico-chemical properties of air fuel mixture, viz combustion temperature, oxygen concentration, latent heat of vaporisation, fuel distribution, cetane number and ignition delay, that occurred with addition of ethanol content. The rise in peak pressure of cycle, heat release rate and ignition delay along with decrease in combustion duration for different rates of ethanol fumigation have been observed. The increasing fumigation levels of ethanol results in the increase of maximum rate of pressure rise by 0.3-0.5 bar/degrees crank angle and the crank angle after top dead centre, where peak pressure occurs, shifts by 1-4 degrees of crank angle. It is also observed that maximum heat release rate increases by 2-9 J/degrees crank angle as compared to baseline diesel case. Coefficient of Variance of indicated mean effective pressure increases with ethanol fumigation. (C) 2016 Elsevier Ltd. All rights reserved.
机译：化石燃料的储量减少和价格急剧上涨，对人为温室气体释放引起的气候变化的关注以及严格的环境法规促使研究人员寻找具有清洁燃烧特性且可能是本地生产的可再生替代燃料。酒精是一种含氧燃料，可改善燃烧并减少温室气体排放，从而促进农业经济发展，并从整体上促进国民经济。本文的目的是研究使用熏蒸乙醇的小容量压缩点火发动机的热性能，废气排放和燃烧行为。借助简化的低成本乙醇供油系统，可以在抽吸过程中以不同流速将熏蒸后的乙醇供应到钢瓶。与纯柴油相比，进行乙醇熏蒸后，由于低劣的燃烧，制动器在低负荷下的热效率降低了11.2％，而在高负荷下改进的燃烧使效率提高了6％。对于不同的乙醇熏蒸速度，氮氧化物，烟气和二氧化碳的最大排放量分别减少了22％，41％和27％，同时碳氢化合物和一氧化碳的排放量同时增加，最高分别达到144％和139％。与纯柴油运行相比，已经观察到。这是由于空气燃料混合物的理化性质发生了变化，即燃烧温度，氧气浓度，汽化潜热，燃料分布，十六烷值和点火延迟的变化，这些变化是由于添加了乙醇而引起的。对于乙醇熏蒸的不同速率，已经观察到循环峰值压力，放热率和点火延迟的增加以及燃烧持续时间的减少。乙醇熏蒸水平的提高导致最大压力上升速率增加0.3-0.5 bar /度的曲柄角，并且在出现峰值压力的上止点之后的曲柄角移动1-4度曲柄角。还观察到，与基准柴油机情况相比，最大放热速率以2-9 J /度的曲柄角增加。指示平均有效压力的方差系数随乙醇熏蒸而增加。 （C）2016 Elsevier Ltd.保留所有权利。

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