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Study on performance of a novel energy-efficient heat pump system using liquid desiccant

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  • Shan, Nannan
  • Yin, Yonggao
  • Zhang, Xiaosong

Abstract

In this paper, a novel heat pump system is proposed, which operates as a heat-source-tower heat pump with no frosting in winter, and as a hybrid refrigerant system consisting of a conventional chiller combined with a liquid desiccant dehumidification and evaporative cooling subsystem in summer. A validated mathematical model of the proposed system operating in summer is established to investigate the effects of key parameters, including solution to refrigerant flow ratio (FR), condensation heat recovery ratio (Rcond) and ambient parameters, on the cooling performance. Besides, this paper analyzes key factors that should be considered in designing the heat exchange area of the solution-cooled condenser (SCC). The results show that the maximum COP and ECOP of the heat pump system are 13.4% and 10.3% higher than those of conventional vapor compression refrigerant systems under the typical summer condition of Nanjing, respectively. The recommended range of FR is from 1.2 to 6 and that for Rcond is from 16% to 40%. Moreover, the proposed system is more superior to conventional ones when applied in hot and humid regions.

Suggested Citation

  • Shan, Nannan & Yin, Yonggao & Zhang, Xiaosong, 2018. "Study on performance of a novel energy-efficient heat pump system using liquid desiccant," Applied Energy, Elsevier, vol. 219(C), pages 325-337.
    • Handle: RePEc:eee:appene:v:219:y:2018:i:c:p:325-337
    DOI: 10.1016/j.apenergy.2018.03.006
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    References listed on IDEAS

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    1. Stabat, Pascal & Marchio, Dominique, 2004. "Simplified model for indirect-contact evaporative cooling-tower behaviour," Applied Energy, Elsevier, vol. 78(4), pages 433-451, August.
    2. Liu, X.H. & Jiang, Y. & Chang, X.M. & Yi, X.Q., 2007. "Experimental investigation of the heat and mass transfer between air and liquid desiccant in a cross-flow regenerator," Renewable Energy, Elsevier, vol. 32(10), pages 1623-1636.
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    4. 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.
    5. Zhou, Zhihua & Zhang, Zhiming & Chen, Guanyi & Zuo, Jian & Xu, Pan & Meng, Chong & Yu, Zhun, 2016. "Feasibility of ground coupled heat pumps in office buildings: A China study," Applied Energy, Elsevier, vol. 162(C), pages 266-277.
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    Cited by:

    1. Wen, Tao & Lu, Lin, 2019. "A review of correlations and enhancement approaches for heat and mass transfer in liquid desiccant dehumidification system," Applied Energy, Elsevier, vol. 239(C), pages 757-784.
    2. Su, Wei & Lu, Zhifei & She, Xiaohui & Zhou, Junming & Wang, Feng & Sun, Bo & Zhang, Xiaosong, 2022. "Liquid desiccant regeneration for advanced air conditioning: A comprehensive review on desiccant materials, regenerators, systems and improvement technologies," Applied Energy, Elsevier, vol. 308(C).
    3. Cui, Haijiao & Li, Nianping & Peng, Jinqing & Yin, Rongxin & Li, Jingming & Wu, Zhibin, 2018. "Investigation on the thermal performance of a novel spray tower with upward spraying and downward gas flow," Applied Energy, Elsevier, vol. 231(C), pages 12-21.
    4. Dai, Yuze & Liu, Feng & Sui, Jun & Wang, Dandan & Han, Wei & Jin, Hongguang, 2020. "Hybrid liquid desiccant air-conditioning system combined with marine aerosol removal driven by low-temperature heat source," Applied Energy, Elsevier, vol. 275(C).

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