Design of waste heat recovery system for direct injection diesel engine

Abstract

In order to reduce environmental pollution and realize effective utilization of resources, it is necessary to recycle the gas emitted by direct injection diesel engine. Therefore, a direct injection diesel exhaust waste heat recovery system is studied in this paper. Freon is used as the working medium, the waste heat is converted into organic working medium by evaporator for evaporation treatment, and then the condenser is used for condensation treatment, so as to complete the hardware design of the system. In the software part, the evaporator pressure and condensation pressure are determined according to the evaporator temperature and condensation temperature, and the carbon calculation model is used to calculate the preheating parameters, so as to realize the recovery of exhaust waste heat of direct injection diesel engine. The experimental results show that the average waste heat recovery cycle time of the system is 7.795 MS, the efficiency is high, and the waste heat recovery efficiency is as high as 95%, which can effectively realize the exhaust waste heat recovery of direct injection diesel engine, in order to provide some help for saving economic cost and realizing the effective utilization of resources