推进特性试验下生物乳化柴油对柴油机性能的影响

在柴油机上进行柴油、三种生物乳化柴油(E10、E15和E20)和生物柴油的推进特性试验,就其燃烧特性、动力性、经济性及常规排放特性进行对比。试验结果显示:高转速时,生物乳化柴油的缸内燃烧压力和放热率略低于柴油,缸内燃烧温度有所降低;动力性相比柴油略有下降,仅E10的燃油消耗率比柴油低,B100最高;烟度和NOx排放均有显著降低,且随水和丁醇掺混比例增加而降低; CO和HC排放与柴油基本无差别,整体增加不多。表明:生物乳化柴油作为替代燃料能保证柴油机运行的稳定性,可同时降低柴油机的烟度和NOx排放,具有良好的环境效益和经济效益。

The Effect of Bio-Emulsified Diesel on Diesel Engine Performance Under the Propulsion Characteristic Test

Diesel fuel, three kinds of bio-emulsified diesel(E10, E15, E20) and biodiesel were tested on a diesel engine under the propulsion characteristic condition. The combustion characteristic, power, economic, and emission characteristics of these five fuels were compared with each other. The results show that at full load, the combustion pressure and heat release rate of bio-emulsified diesels are slightly lower than that of diesel and the combustion temperature in the cylinder decreases, the power performance has a slight decrease compared with diesel. Only E10 has a lower fuel consumption rate than diesel, and B100 is the highest. NO_x emission and the smoke value decreased significantly as the mixing proportion of water and butanol increased. The CO and HC emissions of bio-emulsified diesels are basically indistinguishable from diesel, and the overall increase is not much. It can be concluded that as an alternative fuel, bio-emulsified diesel can guarantee the stability of diesel engine, and meanwhile reduce the smoke and NO_x emission, which has good environmental and economic benefits.