In order to create a low temperature environment for ships and refrigerated heavy trucks and improve the utilization efficiency of low grade waste heat from engine,an absorption-compression cascade refrigeration system driven by waste heat from engine is proposed.The model is established and simulated from the perspectives of energy,exer-gy,economy and environment.Through multi-objective optimization,the optimal operat-ing parameters of the system are obtained by taking the low-temperature grade evapora-tion temperature,low-temperature grade condensing temperature,high-temperature grade condensing temperature and cascade heat transfer temperature difference as decision varia-bles.The results show that under the optimal operating conditions,the COP of the system can reach 1.55,the exergy efficiency can reach 0.246,and the total cost can reach 15 055.23 $ per year.
关键词
复叠制冷/废热/性能系数/经济/优化
Key words
cascade refrigeration/waste heat/coefficient of performance/exergy/eco-nomic/optimization
维普
万方数据