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Optimization strategies to reduce the biodiesel NOx effect in diesel engine with experimental verification

机译：通过实验验证降低柴油机中生物柴油NOx效应的优化策略

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In this study the combustion, performance and emission parameters of single cylinder, four stroke, constant speed diesel engine operating on diesel oil and different blends of soybean methyl ester (SME) have been investigated experimentally and also theoretically using the simulation software Diesel-rk. It was found that 25.27%, 36.93%, and 52.96% reduction in the Bosch smoke number is obtained with B20% SME, B40% SME and B100% SME respectively, as compared to pure diesel fuel. All blends of biodiesel are observed to emit higher NOx emissions relative to that of nominal diesel level. The results point out that B20% SME was the best one which gives little performance differences with good reduction in emissions when compared to diesel fuel. Different strategies are adopted to control biodiesel NOx effect on the B20% SME. From the one dimensional strategy it is observed that cooling air temperature from (55 to 15) ℃ reduce NOx, air pollutant emissions (SE), Bosch smoke number and brake specific fuel consumption (BSFC) by 10.53%, 17.63%, 24.35%, and 6.2% respectively with respect to base line operation. Deeper piston bowel with small diameter gives a significant reduction in the NOx emissions. According to scanning 2-dimensional strategy it is found that the best reduction in the NOx, air pollutant emissions and Bosch smoke number is 22.84%, 20.2%, and 8.31% respectively while BSFC is increased by 5.14% at 19 compression ratio and 0.06 exhaust gas recirculation ratio (EGR). A multiparametric optimization technique using Rosenbrok method for diesel engine operating on B20% SME was investigated theoretically. The optimization gives 50.26% reduction in NOx emissions. The theoretical simulation results are verified with the experimental study conducted at the same operating conditions.
机译：在这项研究中，已经通过实验以及理论上使用模拟软件Diesel-rk对单缸，四冲程，恒速柴油发动机和以柴油为原料的大豆，甲基丙烯酸甲酯（SME）的不同混合物进行了燃烧，性能和排放参数的研究。发现与纯柴油相比，B20％SME，B40％SME和B100％SME分别使博世烟尘量减少了25.27％，36.93％和52.96％。相对于标称柴油水平，观察到所有生物柴油共混物均排放更高的NOx排放量。结果指出，与柴油相比，B20％的SME是最好的SME，其性能差异不大，并且排放量减少。采用了不同的策略来控制生物柴油对B20％中小企业的氮氧化物影响。从一维策略中可以看出，从（55至15）℃的冷却空气温度可将NOx，空气污染物排放（SE），博世烟气量和制动器比燃料消耗（BSFC）降低10.53％，17.63％，24.35％，基准线操作分别为6.2％和6.2％。小直径的较深活塞肠可显着减少NOx排放。根据扫描二维策略，发现氮氧化物，空气污染物排放量和博世烟尘量的最佳减少分别为22.84％，20.2％和8.31％，而BSFC在19压缩比和0.06排气时增加了5.14％。气体再循环比（EGR）。理论上研究了使用Rosenbrok方法的柴油机在B20％SME上运行的多参数优化技术。通过优化，NOx排放量可减少50.26％。理论仿真结果通过在相同操作条件下进行的实验研究得到验证。

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