An experimental investigation on reverse-cycle defrosting performance for an air source heat pump using an electronic expansion valve

Minglu Qu, Liang Xia, Shiming Deng and Yiqiang Jiang

Applied Energy, 2012, vol. 97, issue C, 327-333

Abstract: When an air source heat pump (ASHP) operates in heating mode, frost can be accumulated on the surface of its finned outdoor coil. Frosting deteriorates the operation and energy efficiency of the ASHP and periodic defrosting becomes necessary. Currently the most widely used standard defrosting method for ASHPs is reverse cycle defrost. On the other hand, electronic expansion valves (EEVs) are commonly used in heat pump/refrigeration systems, including ASHP units, as throttle regulators of refrigerant flow.

Keywords: Air source heat pump; Reverse cycle defrost; EEV; Performance (search for similar items in EconPapers)
Date: 2012
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Citations: View citations in EconPapers (13)

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DOI: 10.1016/j.apenergy.2011.11.057

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