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首页> 外文期刊>International journal of green energy >A COMPARATIVE ANALYSIS OF THERMAL PERFORMANCE AND EMISSION CHARACTERISTICS OF METHYL ESTERS OF KARANJA AND JATROPHA OILS BASED ON A VARIABLE COMPRESSION RATIO DIESEL ENGINE
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A COMPARATIVE ANALYSIS OF THERMAL PERFORMANCE AND EMISSION CHARACTERISTICS OF METHYL ESTERS OF KARANJA AND JATROPHA OILS BASED ON A VARIABLE COMPRESSION RATIO DIESEL ENGINE

机译：基于变压比柴油机的卡兰加和麻疯树油甲基酯热性能和排放特性比较分析

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摘要

The present experimental investigation is concerned with the comparative evaluation of karanja and jatropha methyl esters (biodiesel) as an alternative fuel in a diesel engine based on the thermal performance and emission characteristics. The experiments are conducted on a single-cylinder, four-stroke, direct-injection, variable compression ratio (CR), and compression ignition engine and the experimental parameters considered include the engine torque, injection pressure, and CR. Comparative measures of brake thermal efficiency (BTHE), brake specific fuel consumption (BSFC), exhaust gas temperature, smoke opacity, and HC, CO, and NO_x emissions are presented and discussed. It is observed that, at full torque, BTHE is lower by 4.4% and 4.5% and BSFC is higher by about 6% and 15% for karanja and jatropha biodiesel, respectively, compared to that of diesel At a torque of 20 Nm, CO emission levels for karanja are higher by 9% compared to jatropha but lesser by about 11% in comparison with that of diesel Results show that thermal performance of the engine fuelled with both the biodiesels is generally comparable to that when the engine is fuelled with pure diesel. At higher compression ratios, the engine fuelled with both the biodiesels gives lesser emissions and better performance compared to that of diesel
机译：本实验研究涉及基于热性能和排放特性对作为柴油机替代燃料的魔芋和麻风树甲酯（生物柴油）进行比较评估。实验是在单缸，四冲程，直接喷射，可变压缩比（CR）和压缩点火发动机上进行的，所考虑的实验参数包括发动机扭矩，喷射压力和CR。介绍并讨论了制动器热效率（BTHE），制动器比油耗（BSFC），废气温度，烟气不透明度以及HC，CO和NO_x排放的比较措施。可以看到，在全扭矩下，与柴油相比，karanja和麻风树生物柴油的BTHE分别降低了4.4％和4.5％，BSFC分别升高了大约6％和15％。 karanja的排放水平比麻疯树高9％，但比柴油低约11％。结果表明，两种生物柴油为燃料的发动机的热性能通常与纯柴油为燃料的发动机可比。在更高的压缩比下，与柴油相比，两种生物柴油为燃料的发动机排放量更少，性能更好。

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