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为协同推广使用不同生物质来源的乙醇和生物柴油,研究了不同混合比下乙醇-柴油-生物柴油混合含氧燃料的经济性、动力性与排放特性,为混合含氧燃料的推广应用提供理论和试验依据。研究结果表明:以柴油为参照,柴油机燃用3种混合燃料时的缸内压力均略有降低,EBD1(80%柴油+20%生物柴油)峰值压力出现位置提前约1°CA,乙醇的加入使EBD2(70%柴油+20%生物柴油+10%乙醇)和EBD3(55%柴油+20%生物柴油+25%乙醇)压力峰值略有滞后;3种混合燃料对应放热率曲线峰值均低于纯柴油。随生物柴油以及乙醇掺混比例的增加,混合燃料的放热率峰值呈现不同程度的下降;随混合燃料含氧量的增加,HC和CO排放均有不同程度的降低,烟度排放下降趋势明显,而NOx排放则略有增加。
In order to synergistically promote the use of ethanol and biodiesel from different biomass sources, the economic, dynamic and emission characteristics of ethanol-diesel-biodiesel mixed oxy-fuel under different mixture ratios were studied to provide the theory for the popularization and application of mixed oxy-fuel And test basis. The results show that when the diesel fuel is burned with 3 kinds of fuel mixture, the pressure in cylinder decreases slightly and the peak pressure of EBD1 (80% diesel + 20% biodiesel) appears about 1 ° CA ahead of time. The addition of ethanol The pressure peaks of EBD2 (70% diesel + 20% biodiesel + 10% ethanol) and EBD3 (55% diesel + 20% biodiesel + 25% ethanol) slightly lagged; In pure diesel. With the increase of the blending ratio of biodiesel and ethanol, the peak of the heat release rate of the blended fuel decreased to some extent. With the increase of the oxygen content of the mixed fuel, the HC and CO emissions decreased to some extent and the smoke emission decreased obviously While NOx emissions increased slightly.