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- W2372420219 abstract "In this paper,performance factors of a R410a direct-current variable frequency heat pump water heater are experimentally studied.It is found that when ambient temperature and inlet water temperature are constant,compressor is worked at higher frequency and Electric Expansion Valve(EEV) is kept at a corresponding opening,the shortest heating time and the least power consumption of the system can be got at the same range of water temperature rise.At the same time,in order to reduce discharge pressure,compressor frequency should be reduced and EEV opening should be increased with water temperature increasing.In addition,at ambient temperature22℃and inlet water temperature 20℃,outlet water temperature is kept above 55℃,When the outlet water flow is increased from 1.8L/min to 3.8L/min,the heat capacity and COP of the system are improved corresponding.And only when the outlet water flow is between 3.0 L/min and 4.0 L/min,the COP of the system can be achieved the maximum value and kept above 4.0." @default.
- W2372420219 created "2016-06-24" @default.
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- W2372420219 date "2011-01-01" @default.
- W2372420219 modified "2023-09-26" @default.
- W2372420219 title "Research on Performance Factors of Direct-current Variable Frequency Heat Pump Water Heater" @default.
- W2372420219 hasPublicationYear "2011" @default.
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