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乙醇吸热后部分热解可产生多种气体的混合物,为了研究气体混合物掺混燃烧在柴油机上的节油效果,对柴油机系统进行了改造:乙醇通过安装在柴油机排气管上的小型高效换热器吸收烟气余热,部分热解后混合气体由进气道通入柴油机燃烧室改善燃烧。在该系统上进行了定功率-不同转速以及额定转速-不同功率下的节油试验,表明:该系统在高低功率条件下均有较好的节油和节能效果。柴油机转速为1 500 r/min时,节油率最高可达40%,节能率最高可达13.5%;在柴油机额定转速2 000 r/min时,节油率最高可达24%,节能率最高可达5.7%。结合乙醇热解的气体混合物的测量数据,得出了低功率下主要依靠乙醇蒸气,高功率下主要依靠小分子气体的节油原理。
In order to study the fuel-efficient effect of blended blends on diesel engines, the diesel engine system was modified: the ethanol was passed through a small, highly efficient exchanger installed on the exhaust pipe of a diesel engine The heat absorber absorbs the waste heat of the flue gas, and after the partial pyrolysis, the mixed gas is introduced into the diesel combustion chamber from the air inlet to improve the combustion. In this system, the constant power - different speed and rated speed - fuel saving experiments under different power showed that the system has better fuel economy and energy saving under high and low power conditions. Diesel engine speed of 1500 r / min, the fuel efficiency up to 40%, saving up to 13.5%; at rated speed of diesel engine 2000 r / min, saving up to 24%, the highest energy-saving rate Up to 5.7%. Combining with the measured data of ethanol pyrolysis gas mixture, it is concluded that ethanol vapor mainly relies on low-power, and the fuel-saving principle relies mainly on small molecular gas at high power.