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Effect of nozzle opening pressure on combustion, performance, and emission analyses of a dual fuel diesel engine
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects ( IF 2.9 ) Pub Date : 2020-06-18 , DOI: 10.1080/15567036.2020.1780349
Naseem Khayum 1 , Anbarasu Subramanian 1 , Murugan Sivalingam 1
Affiliation  

In this study, a single cylinder, four stroke, air cooled, direct injection (DI) diesel engine developing a power of 4.4 kW at a constant speed of 1500rpm was modified to operate on a dual fuel mode running on raw biogas–Waste cooking oil methyl ester (WCOME); where, WCOME was used as a pilot fuel to initiate combustion, while biogas was used as a primary fuel which proceeded throughout the engine operation. For the dual fuel operation, the effect of nozzle opening pressure of the fuel injector was varied from the original nozzle opening pressure of 200 bar to 280 bar at a regular interval of 20 intervals. Also, the engine load in terms of power output was varied from 0 to 4 kW in steps of 1 kW. The combustion, performance, and emission analyses of the engine run on the dual fuel operation at different nozzle opening pressure were compared with those of the normal diesel operation at different loads. The test results indicated that, thermal efficiency increased by about 4.6% for 240 bar at full load. In the dual fuel operation, NO emission increased with the increase in the nozzle opening pressure, however, NO emission was still lesser than that of the diesel operation. From the obtained results, it is suggested that, a nozzle opening pressure of 240 bar can be considered as an optimum condition for the tested engine which was run biogas-WCOME on a dual fuel mode.



中文翻译:

喷嘴开启压力对双燃料柴油机燃烧,性能和排放分析的影响

在本研究中,对单缸,四冲程,空冷,直喷(DI)柴油发动机进行了改造,以1500rpm的恒定速度产生了4.4 kW的功率,以双燃料模式运行,并使用了原始沼气–废烹饪油甲酯(WCOME); 在这里,WCOME被用作引燃的引燃燃料,而沼气被用作在整个发动机运行过程中进行的主要燃料。对于双燃料操作,喷油器的喷嘴打开压力的影响以20个规则的间隔从200 bar的原始喷嘴打开压力变为280 bar。另外,就功率输出而言,发动机负载从0到4 kW以1 kW为步长变化。燃烧性能 比较了在不同喷嘴开启压力下双燃料运行的发动机的排放分析与在不同负载下正常柴油运行的排放分析。测试结果表明,满载时240 bar的热效率提高了约4.6%。在双燃料运行中,NO排放随着喷嘴打开压力的增加而增加,但是,NO排放仍小于柴油运行。根据获得的结果,建议将240 bar的喷嘴打开压力视为对以双燃料模式运行沼气-WCOME的被测发动机的最佳条件。随着喷嘴打开压力的增加,NO排放量增加,但是,NO排放量仍然小于柴油机运行时的排放量。根据获得的结果,建议将240 bar的喷嘴打开压力视为对以双燃料模式运行沼气-WCOME的被测发动机的最佳条件。随着喷嘴打开压力的增加,NO排放量增加,但是,NO排放量仍然小于柴油机运行时的排放量。根据获得的结果,建议将240 bar的喷嘴打开压力视为对以双燃料模式运行沼气-WCOME的被测发动机的最佳条件。

更新日期:2020-06-19
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