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Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review

Author

Listed:
  • Yi Zhang

    (School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China)

  • Guanmin Zhang

    (School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China)

  • Aiqun Zhang

    (State Grid Shandong Integrated Energy Services Company Limited, Jinan 250021, Shandong, China)

  • Yinhan Jin

    (State Grid Liaocheng Power Supply Company, Liaocheng 252000, Shandong, China)

  • Ruirui Ru

    (State Grid Liaocheng Power Supply Company, Liaocheng 252000, Shandong, China)

  • Maocheng Tian

    (School of Energy and Power Engineering, Shandong University, Jinan 250061, Shandong, China)

Abstract

Frost layer on the outdoor air heat exchanger surface in an air-source heat pump (ASHP) can decrease the system coefficient of performance (COP). Although the common defrosting and anti-frosting methods can improve the COP, the periodic defrosting not only reduces the system energy efficiency but also deteriorates the indoor environment. To solve these problems, it is necessary to clearly understand the frosting phenomenon and to achieve the system frost-free operation. This paper focused firstly on the analyses of frosting pathways and frosting maps. Followed by summarizing the characteristics of frost-free technologies. And then the performances of two types of frost-free ASHP (FFASHP) systems were reviewed, and the exergy and economic analysis of a FFASHP heating system were carried out. Finally, the existing problems related to the FFASHP technologies were proposed. Results show that the existing frosting maps need to be further improved. The FFASHP systems can not only achieve continuous frost-free operation but reduce operating cost. And the total COP of the FFASHP heating system is approximately 30–64% higher than that of the conventional ASHP system under the same frosting conditions. However, the investment cost of the FFASHP system increases, and its reliability also needs further field test in a wider frosting environment. In the future, combined with a new frosting map, the control strategy for the FFASHP system should be optimized.

Suggested Citation

  • Yi Zhang & Guanmin Zhang & Aiqun Zhang & Yinhan Jin & Ruirui Ru & Maocheng Tian, 2018. "Frosting Phenomenon and Frost-Free Technology of Outdoor Air Heat Exchanger for an Air-Source Heat Pump System in China: An Analysis and Review," Energies, MDPI, vol. 11(10), pages 1-36, October.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:10:p:2642-:d:173548
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    References listed on IDEAS

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    Cited by:

    1. Carroll, P. & Chesser, M. & Lyons, P., 2020. "Air Source Heat Pumps field studies: A systematic literature review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
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    3. Tomas Kropas & Giedrė Streckienė & Juozas Bielskus, 2021. "Experimental Investigation of Frost Formation Influence on an Air Source Heat Pump Evaporator," Energies, MDPI, vol. 14(18), pages 1-15, September.
    4. Konrad, Mary Elizabeth & MacDonald, Brendan D., 2023. "Cold climate air source heat pumps: Industry progress and thermodynamic analysis of market-available residential units," Renewable and Sustainable Energy Reviews, Elsevier, vol. 188(C).

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