Research on the characteristics of dual-temperature heat pump based on refrigerant leakage

In order to meet the demand for dual-temperature heating in production and life, a dual-temperature heat pump system based on refrigerant leakage was proposed. By establishing and verifying the mathematical model and system model of the scroll compressor based on refrigerant leakage for numerical simulation, the system was calculated and analyzed under different discharge outlet positions, discharge outlet sizes, evaporation temperatures, high-temperature condensation temperatures, and medium-temperature condensation temperatures. The changing trends of performance parameters were compared with traditional dual-temperature heat pump systems. The results show that the sooner the middle discharge port of the compressor is opened, the less power the compressor consumes, and the larger the discharge port is, the more obvious the energy-saving effect of the system is; Compared with the traditional dual-temperature heat pump system, the heating performance coefficient is significantly improved under different working conditions, with the highest of 16%. The model proposed in the study provides a more effective method for the theoretical analysis of refrigerant leakage dual-temperature heat pumps and air-supplemented enthalpy-increasing heat pump systems, and the research results provide a theoretical basis for the optimization of scroll compressor performance, and the research, design and system performance improvement of dual-temperature heat pump systems.