Experimental Research of the Effect of Inlet Structure on the Discharge Performance of Heat Pump Water Heater
A curved baffle-type inlet structure was designed for a water storage tank to improve the performance of an air-source heat pump water heater system. A heat pump water heater test bench was set up to compare the extraction efficiency and COP of the curved baffle inlet structure to the direct-entranc...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2022-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2022.03.115 |
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| Summary: | A curved baffle-type inlet structure was designed for a water storage tank to improve the performance of an air-source heat pump water heater system. A heat pump water heater test bench was set up to compare the extraction efficiency and COP of the curved baffle inlet structure to the direct-entrance and side-entrance inlet structures. The experimental results showed that the thermal stratification of water along the height direction was effectively released by the curved baffle-type inlet structure. Compared to the direct-entrance inlet structure water heater, the extraction efficiency increased from 52.87% to 96.60% with a curved baffle-type inlet heat pump water heater when the inlet flow rate ranged from 5 L/min to 10 L/min, and the COP improved from 7.14% to 7.40%. Contrary to the side-entrance inlet structure water heater, the extraction efficiency increased from 38.37% to 76.99% with a curved baffle-type inlet heat pump water heater when the inlet flow rate ranged from 5 to 10 L/min, and the COP improved from 3.22% to 5.53%. The performance improvement increased as the inlet flow rate increased. The curved baffle-type inlet structure of the heat pump water heater simultaneously increased the extraction efficiency and the system’s COP. |
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| ISSN: | 0253-4339 |