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Research on frost formation in air source heat pump at cold-moist conditions in central-south China

Author

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  • Gong, Guangcai
  • Tang, Jinchen
  • Lv, Dongyan
  • Wang, Hongjin

Abstract

A dynamic evaporator model of air source heat pump (ASHP), considering the ratio of the latent heat to sensible heat of wet air, is presented to analyze the performance of ASHP under frosting. The performance parameters, such as the heating capacity, COP and the outlet temperature of compressor, are simulated with CYCLEPAD. Then a semi-empirical correlation that predicts frost accumulation on the air-side of fin-tube heat exchanger is developed with dimensionless analysis and also modified by a test conducted under cold-moist conditions in winter. In addition, eight influence factors are considered involving the ambient conditions and structures of heat exchanger, whose effects are analyzed as well. Among them, the equivalent diameter of air flow cross-section in fin-tube deq is especially proposed. Lastly, the relationships between the ratio, the performance parameters and the frost accumulation are discussed in this paper, followed by an evaluation of an optimal defrosting time interval to improve the ASHP’s energy efficiency and operational reliability at cold-moist conditions in central-south China.

Suggested Citation

  • Gong, Guangcai & Tang, Jinchen & Lv, Dongyan & Wang, Hongjin, 2013. "Research on frost formation in air source heat pump at cold-moist conditions in central-south China," Applied Energy, Elsevier, vol. 102(C), pages 571-581.
    • Handle: RePEc:eee:appene:v:102:y:2013:i:c:p:571-581
    DOI: 10.1016/j.apenergy.2012.08.001
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    References listed on IDEAS

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    1. Qu, Minglu & Xia, Liang & Deng, Shiming & Jiang, Yiqiang, 2012. "An experimental investigation on reverse-cycle defrosting performance for an air source heat pump using an electronic expansion valve," Applied Energy, Elsevier, vol. 97(C), pages 327-333.
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    Cited by:

    1. Li, Sihui & Gong, Guangcai & Peng, Jinqing, 2019. "Dynamic coupling method between air-source heat pumps and buildings in China’s hot-summer/cold-winter zone," Applied Energy, Elsevier, vol. 254(C).
    2. Yang, Bowen & Dong, Jiankai & Zhang, Long & Song, Mengjie & Jiang, Yiqiang & Deng, Shiming, 2019. "Heating and energy storage characteristics of multi-split air source heat pump based on energy storage defrosting," Applied Energy, Elsevier, vol. 238(C), pages 303-310.
    3. Wang, Fenghao & Wang, Zhihua & Zheng, Yuxin & Lin, Zhang & Hao, Pengfei & Huan, Chao & Wang, Tian, 2015. "Performance investigation of a novel frost-free air-source heat pump water heater combined with energy storage and dehumidification," Applied Energy, Elsevier, vol. 139(C), pages 212-219.
    4. Wang, Chenguang & Gong, Guangcai & Su, Huan & Wah Yu, Chuck, 2015. "Efficacy of integrated photovoltaics-air source heat pump systems for application in Central-south China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 49(C), pages 1190-1197.
    5. Fan, Yi & Zhao, Xudong & Li, Jing & Li, Guiqiang & Myers, Steve & Cheng, Yuanda & Badiei, Ali & Yu, Min & Golizadeh Akhlaghi, Yousef & Shittu, Samson & Ma, Xiaoli, 2020. "Economic and environmental analysis of a novel rural house heating and cooling system using a solar-assisted vapour injection heat pump," Applied Energy, Elsevier, vol. 275(C).
    6. Tang, Jinchen & Gong, Guangcai & Su, Huan & Wu, Fanhao & Herman, Cila, 2016. "Performance evaluation of a novel method of frost prevention and retardation for air source heat pumps using the orthogonal experiment design method," Applied Energy, Elsevier, vol. 169(C), pages 696-708.
    7. Rafati Nasr, Mohammad & Kassai, Miklos & Ge, Gaoming & Simonson, Carey J., 2015. "Evaluation of defrosting methods for air-to-air heat/energy exchangers on energy consumption of ventilation," Applied Energy, Elsevier, vol. 151(C), pages 32-40.
    8. Ni, Long & Dong, Jiankai & Yao, Yang & Shen, Chao & Qv, Dehu & Zhang, Xuedan, 2015. "A review of heat pump systems for heating and cooling of buildings in China in the last decade," Renewable Energy, Elsevier, vol. 84(C), pages 30-45.

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