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首页> 外文期刊>International journal of green energy >THE EFFECT OF ETHANOL ADDITION IN A BIODIESEL OPERATED Dl DIESEL ENGINE ON COMBUSTION, PERFORMANCE, AND EMISSION CHARACTERISTICS
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THE EFFECT OF ETHANOL ADDITION IN A BIODIESEL OPERATED Dl DIESEL ENGINE ON COMBUSTION, PERFORMANCE, AND EMISSION CHARACTERISTICS

机译：乙醇操作的Dl柴油机中乙醇的添加对燃烧，性能和排放特性的影响

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摘要

In this study, diesel fuel, biodiesel, and biodiesel-ethanol blends (BEBs) were tested in a single cylinder direct-injection (DI) diesel engine to investigate the combustion, performance, and emission characteristics of the engine at the maximum torque and an engine speed of 1500 rpm. The results indicate that when compared with biodiesel, the combustion characteristics of BE blends changed; the engine performance has improved slightly with 5% ethanol in biodiesel (BEBS). The brake thermal efficiency increases slightly with lower blends and no significant improvement with higher ethanol blends. The effectiveness of NO_x and smoke density increases with increasing ethanol in the blends. With a high percentage of ethanol in the BE blends, the hydrocarbon (HC) and carbon monoxide (CO) emissions could increase. But the use of BEBS could reduce the HC and CO emissions as well. In general, the BE blends have lower NO_X emissions, compared with biodiesel and diesel fuel. The smoke density decreases for lower ethanol blends compared with diesel and biodiesel fuel. On the whole, the BE blends give lower HC, CO, smoke density, and NO_X emission compared with diesel fuel. But the additions of more ethanol with biodiesel have no significant improvement in the emission levels.
机译：在这项研究中，柴油，生物柴油和生物柴油-乙醇混合物（BEB）在单缸直喷（DI）柴油发动机中进行了测试，以研究在最大扭矩和最大扭矩下发动机的燃烧，性能和排放特性。发动机转速为1500 rpm。结果表明，与生物柴油相比，BE共混物的燃烧特性发生了变化；在生物柴油中添加5％乙醇（BEBS）后，发动机性能略有改善。掺混量较低时，制动热效率略有提高，掺混量较高的乙醇中，制动热效率无明显改善。 NO_x的有效性和烟气密度随掺合物中乙醇含量的增加而增加。由于BE掺混物中乙醇含量高，碳氢化合物（HC）和一氧化碳（CO）排放量可能会增加。但是，使用BEBS也可以减少HC和CO排放。通常，与生物柴油和柴油燃料相比，BE混合燃料的NO_X排放量较低。与柴油和生物柴油燃料相比，乙醇混合含量较低的烟气密度降低。总体而言，与柴油相比，BE混合气的HC，CO，烟气密度和NO_X排放量更低。但是，在生物柴油中添加更多乙醇并没有显着改善排放水平。

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