Performance and emissions characteristics of Jatropha oil (preheated and blends) in a direct injection compression ignition engine
Performance and emissions characteristics of Jatropha oil (preheated and blends) in a direct injection compression ignition engine
复制标题
DOI：
10.1016/j.applthermaleng.2007.01.009
复制
发表时间：
2007-09-01
影响因子：
6.4
通讯作者：
Agarwal, Avinash Kumar
中科院分区：
文献类型：
--
作者：
Agarwal, Deepak;Agarwal, Avinash Kumar
传统石油资源的稀缺和迅速枯竭促进了内燃机替代燃料的研究。在各种可能的选择中，从甘油三酯（植物油/动物脂肪）中提取的燃料是有希望的“更环保”的化石燃料替代品。植物油，由于其农业来源，能够减少二氧化碳净排放到大气中，同时进口替代石油产品。然而，文献中报道了在柴油发动机中使用直接植物油的几个操作和耐久性问题，这是因为与矿物柴油相比，植物油的粘度更高，挥发性低。本研究设计实验，研究通过提高燃料温度（利用废气余热）来降低麻疯树油粘度的效果，从而消除其对发动机燃烧和排放特性的影响。实验还研究了麻疯树油与矿物柴油的不同混合粘度对柴油机排放和性能的影响。试验采用农业领域常用的单缸、四冲程、等速、水冷直喷柴油机。对采集到的数据进行了各种参数分析，如热效率、制动比油耗（BSFC）、烟雾不透明度、CO2、CO和HC排放。当使用麻疯树油（预热和混合）运行发动机时，发现性能和排放参数非常接近矿物柴油，混合浓度较低。然而，对于较高的混合浓度，性能和排放被观察到略微较差。(c) 2007 Elsevier Ltd.版权所有。
The scarce and rapidly depleting conventional petroleum resources have promoted research for alternative fuels for internal combustion engines. Among various possible options, fuels derived from triglycerides (vegetable oils/animal fats) present promising "greener" substitutes for fossil fuels. Vegetable oils, due to their agricultural origin, are able to reduce net CO2 emissions to the atmosphere along with import substitution of petroleum products. However, several operational and durability problems of using straight vegetable oils in diesel engines reported in the literature, which are because of their higher viscosity and low volatility compared to mineral diesel fuel.In the present research, experiments were designed to study the effect of reducing Jatropha oil's viscosity by increasing the fuel temperature (using waste heat of the exhaust gases) and thereby eliminating its effect on combustion and emission characteristics of the engine. Experiments were also conducted using various blends of Jatropha oil with mineral diesel to study the effect of reduced blend viscosity on emissions and performance of diesel engine. A single cylinder, four stroke, constant speed, water cooled, direct injection diesel engine typically used in agricultural sector was used for the experiments. The acquired data were analyzed for various parameters such as thermal efficiency, brake specific fuel consumption (BSFC), smoke opacity, CO2, CO and HC emissions. While operating the engine on Jatropha oil (preheated and blends), performance and emission parameters were found to be very close to mineral diesel for lower blend concentrations. However, for higher blend concentrations, performance and emissions were observed to be marginally inferior. (c) 2007 Elsevier Ltd. All rights reserved.