柴油机燃用乙醇-生物柴油的性能试验研究

Testing research of performance on diesel engine fueled with ethanol-biodiesel blends

对乙醇和生物柴油的互溶性和抗水性进行了研究,在ZS195型柴油机上进行了燃用生物柴油、乙醇-生物柴油、含水乙醇-生物柴油与纯柴油的经济性与排放特性对比试验研究。试验结果表明:B90E10和B90A10混合燃料能在20℃环境温度下保持良好的物理稳定性;B90E10,B90A10和生物柴油有效燃油消耗率高于纯柴油;CO排放量,在小负荷时趋于纯柴油的排放水平,大负荷时下降;生物柴油NOx排放量在小负荷时高于纯柴油水平,而B90E10和B90A10较生物柴油依次下降,其中B90A10的NOx排放量低于纯柴油水平,大负荷时3种燃料的NOx排放量接近,均高于纯柴油水平;THC排放量均低于纯柴油水平,其中生物柴油下降幅度最大,B90E10下降幅度最小;碳烟排放较纯柴油大幅度下降,且随着燃料中含氧量的增加依次下降。

Research on the water-resistance,solubility of ethanol and biodiesel,the comparison testing research of economic and emission performance has been done on the ZS195 diesel engine when being fueled with biodiesel,ethanol-biodiesel,hydrous ethanol-biodiesel and pure diesel.The results indicate that B90E10 and B90A10 mixed fuel have good physical stability at 20 ℃.The brake specific fuel consumption of biodiesel,B90E10 and B90A10 is higher than pure diesel.The CO emission is equal to pure diesel at small load,while declining at big load.The NOx emission is higher than pure diesel at small load while B90E10 and B90A10 blends decreasing successively,and B90A10 is lower than that of pure diesel.NOx emission of the three kinds of fuel are nearly equal at big load,which is higher than pure diesel.The THC emission is less than pure diesel,and the declining range of biodiesel is the largest while the case of that for B90E10 blend is the least.The smoke emission of carbon declines larger than pure diesel,and declines successively with the increasing of oxygen that the fuel contain.