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Performance Analysis of Heat Pump Dryer with Unit-Room in Cold Climate Regions

Author

Listed:
  • Ya Yuan

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Wenye Lin

    (Sustainable Buildings Research Centre (SBRC), University of Wollongong (UOW), Wollongong, NSW 2519, Australia)

  • Xiang Mao

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Weizhao Li

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Luwei Yang

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Juan Wei

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China)

  • Bo Xiao

    (Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
    Guangdong Institute of Modern Agricultural Equipment, Guangzhou 510640, China)

Abstract

This study presents the development and evaluation of a novel partially open-loop heat pump dryer with a unit-room (HPDU). The unit-room was designed to enable the ambient air to be mixed with the return air, thereby reducing the influence of the ambient air on the system performance, while maintaining a high system thermal efficiency. A modelling system for the HPDU was developed and validated based on a real-scale experimental study. By using the modelling system, the system characteristics under different ambient conditions and bypass factors were analyzed. The energy benefit of the proposed HPDU was quantified through a comparative study with a closed-loop heat pump dryer (CHPD). It is evident that a maximal specific moisture extraction rate (SMER) and a minimal total energy consumption (TEC) existed when changing the bypass factor of the HPDU under certain ambient temperatures. Compared to the CHPD, the coefficient of performance (COP) of the HPDU increased by up to 39.56%, presenting a significant energy benefit for the application of HPDU.

Suggested Citation

  • Ya Yuan & Wenye Lin & Xiang Mao & Weizhao Li & Luwei Yang & Juan Wei & Bo Xiao, 2019. "Performance Analysis of Heat Pump Dryer with Unit-Room in Cold Climate Regions," Energies, MDPI, vol. 12(16), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:16:p:3125-:d:257624
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    References listed on IDEAS

    as
    1. Song, Mengjie & Gong, Guangcai & Mao, Ning & Deng, Shiming & Wang, Zhihua, 2017. "Experimental investigation on an air source heat pump unit with a three-circuit outdoor coil for its reverse cycle defrosting termination temperature," Applied Energy, Elsevier, vol. 204(C), pages 1388-1398.
    2. Haolu Liu & Khurram Yousaf & Kunjie Chen & Rui Fan & Jiaxin Liu & Shakeel Ahmed Soomro, 2018. "Design and Thermal Analysis of an Air Source Heat Pump Dryer for Food Drying," Sustainability, MDPI, vol. 10(9), pages 1-17, September.
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    Cited by:

    1. Arley Salazar-Hincapié & Alvaro Delgado-Mejía & Andrés Felipe Romero-Maya & Eduardo Duque-Grisales, 2020. "Experimental Assessment of the Thermal Performance of a Heat Pump Dryer System Based on the Variations in Compressor Discharge Pressure on Oregano Drying," Energies, MDPI, vol. 13(23), pages 1-14, December.

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