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A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system: Modeling and experimental validation

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  • Zhang, Li-Zhi
  • Zhang, Ning

Abstract

A compression heat pump driven and membrane-based liquid desiccant air dehumidification system is presented. The dehumidifier and the regenerator are made of two hollow fiber membrane bundles packed in two shells. Water vapor can permeate through these membranes effectively, while the liquid desiccant droplets are prevented from cross-over. Simultaneous heating and cooling of the salt solution are realized with a heat pump system to improve energy efficiency. In this research, the system is built up and a complete modeling is performed for the system. Heat and mass transfer processes in the membrane modules, as well as in the evaporator, the condenser, and other key components are modeled in detail. The whole model is validated by experiment. The performances of SDP (specific dehumidification power), dehumidification efficiency, EER (energy efficiency ratio) of heat pump, and the COP (coefficient of performance) of the system are investigated numerically and experimentally. The results show that the model can predict the system accurately. The dehumidification capabilities and the energy efficiencies of the system are high. Further, it performs well even under the harsh hot and humid South China weather conditions.

Suggested Citation

  • Zhang, Li-Zhi & Zhang, Ning, 2014. "A heat pump driven and hollow fiber membrane-based liquid desiccant air dehumidification system: Modeling and experimental validation," Energy, Elsevier, vol. 65(C), pages 441-451.
    • Handle: RePEc:eee:energy:v:65:y:2014:i:c:p:441-451
    DOI: 10.1016/j.energy.2013.10.014
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    References listed on IDEAS

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    1. Liu, X.H. & Jiang, Y. & Yi, X.Q., 2009. "Effect of regeneration mode on the performance of liquid desiccant packed bed regenerator," Renewable Energy, Elsevier, vol. 34(1), pages 209-216.
    2. Mei, L. & Dai, Y.J., 2008. "A technical review on use of liquid-desiccant dehumidification for air-conditioning application," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(3), pages 662-689, April.
    3. Liang, Cai-Hang & Zhang, Li-Zhi & Pei, Li-Xia, 2010. "Performance analysis of a direct expansion air dehumidification system combined with membrane-based total heat recovery," Energy, Elsevier, vol. 35(9), pages 3891-3901.
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