潜热利用式复合有机朗肯循环余热回收系统构建及优化-partA

In order to make full use of the high exhaust gas temperature and reduce the latent heat loss, a compound organic Rankine cycle system with latent heat utilization is designed, which consists of two stages of high-temperature organic Rankine cycle (HTORC) and low-temperature organic Rankine cycle (LTORC), and is used to recover the high-temperature exhaust gas, medium-temperature coolant and latent heat of the working medium of a heavy-duty diesel engine. Wherein, the hightemperature cycle and the low-temperature cycle are coupled by an integrated evaporator/condenser, i.e., the low-temperature side of the mass condenses the high-temperature side of the mass while realizing the function of energy quality improvement of the low-temperature side of the mass and latent heat reuse of the high-temperature side of the mass. The results show that compared with the separate waste heat recovery systems for high-temperature exhaust gas and medium-temperature coolant, the latent heat utilization type composite system uses the high-temperature cycle condenser to further heat the low-temperature cycle and enhance the evaporation state of the low-temperature cycle working mass, which can give fuller play to the work potential of the low-temperature cycle.