Zhang Ming,Li Jiangtao,Wang Dingyuan,et al. Performance Evaluation of a Packaged R290 Heat Pump Water Heater[J]. Journal of Refrigeration,XXXX,XX(XX):1-7.
Zhang Ming,Li Jiangtao,Wang Dingyuan,et al. Performance Evaluation of a Packaged R290 Heat Pump Water Heater[J]. Journal of Refrigeration,XXXX,XX(XX):1-7.DOI: 10.12465/issn.0253-4339.20260507001.
Performance Evaluation of a Packaged R290 Heat Pump Water Heater
To investigate the effects of fin pitch, refrigerant charge, superheat control, and insulation thickness on the performance of packaged R290 integrated heat pump water heaters and optimize their performance. An evaporator-side simulation model was developed, and the experimental research on the packaged R290 integrated heat pump water heaters was conducted under nominal operating conditions by systematically evaluating the specific effects of various variables on system performance. The results indicate that heat transfer capacity of the evaporator initially increases and then decreases with increasing fin pitch, with an optimal fin pitch of 1.4 mm. Through the optimized superheat control, system heating capacity was further improved. Both the heating capacity and coefficient of performance (COP) exhibited an initial increase followed by a decrease as the refrigerant charge amount increased; the optimal charge amount was 600 g, yielding a heating capacity of 4052 W and a COP of 4.4. Finding the optimal refrigerant charge is crucial to maximize the performance of packaged R290 heat pump water heaters. System performance can also be enhanced by optimizing control logic and evaporator fin pitch. Increasing insulation layer thickness and enhancing evaporator-side air flow rate also significantly improve system performance.
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