Optimization of New Energy Refrigerated Truck Heating System Performance
[Purposes]This paper studies the problems of heating performance degradation and high compressor discharge temperature of single-stage heat pump system in new energy refrigerated trucks under extreme low-temperature environment in winter to improve its heating efficiency and stability in low-temperature environment.[Methods]In this experiment,a quasi two-stage heat pump system with economiser is designed and constructed to optimize the performance of the single-stage heat pump heat-ing system is optimised to improve its heating efficiency and stability in low-temperature environments.[Findings]The experimental results show that at the outdoor ambient temperatures of 5～-15℃,the ex-haust temperature of the quasi-secondary system decreases by 21.16%～42.80%compared with that of the single-stage system;at the same time,the heat production capacity,compressor power,and coeffi-cient of performance(COP)of the quasi-secondary system increase compared with that of the single-stage compression system,respectively,by 7.69%～19.21%,4.10%～12.12%,and 3.50%～6.53%.[Con-clusions]The results show that the quasi-secondary system significantly improves the heating efficiency and stability of the refrigerator truck heating system under low-temperature environment.
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