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Performance of a proposed complete wetting surface counter flow channel type liquid desiccant air dehumidifier

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  • Salah Hassan, M.
  • Hassan, A.A.M.

Abstract

An idea that improves the wettability over the surfaces of a cylindrical dehumidifier channel was proposed and experimentally proved. Fibrous sheets were attached to the inner surfaces of the channel. The capillary effect of fibers sustains the complete wetting of the heat and mass transfer surfaces. The air to be dehumidified and cooled flows upward in the annulus space between the two layers of fibrous sheets, which are saturated with the downward flowing desiccant solution. The permeability of the fibrous sheet was determined experimentally. It was 2.43×10−10m2. The measured solution flow rate due to the capillary suction of the sheets was Γin,min=1.12kg/h m. The liquid desiccant tested was H2O/CaCl2 with salt concentration ratios ranging from 35 to 40%. The measured distribution of the solution flow rate along the circumference of the sheets at the outlet showed 5% deviation from the average flow rate. This is a good indication for the good wettability of walls inside the dehumidifier.

Suggested Citation

  • Salah Hassan, M. & Hassan, A.A.M., 2009. "Performance of a proposed complete wetting surface counter flow channel type liquid desiccant air dehumidifier," Renewable Energy, Elsevier, vol. 34(10), pages 2107-2116.
    • Handle: RePEc:eee:renene:v:34:y:2009:i:10:p:2107-2116
    DOI: 10.1016/j.renene.2009.03.011
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    References listed on IDEAS

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    1. Hamed, Ahmed M. & Sultan, Ahmed A., 2002. "Mass transfer in vertical cloth layers impregnated with calcium chloride for recovery of water from air," Renewable Energy, Elsevier, vol. 27(1), pages 13-25.
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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. Wen, Tao & Luo, Yimo & Wang, Meng & She, Xiaohui, 2021. "Comparative study on the liquid desiccant dehumidification performance of lithium chloride and potassium formate," Renewable Energy, Elsevier, vol. 167(C), pages 841-852.
    3. She, Xiaohui & Yin, Yonggao & Zhang, Xiaosong, 2015. "Suggested solution concentration for an energy-efficient refrigeration system combined with condensation heat-driven liquid desiccant cycle," Renewable Energy, Elsevier, vol. 83(C), pages 553-564.
    4. Yang, Zili & Lian, Zhiwei & Li, Xi & Zhang, Kaisheng, 2015. "Concept of dehumidification perfectness and its potential applications," Energy, Elsevier, vol. 91(C), pages 176-191.
    5. Zendehboudi, Alireza & Tatar, Afshin & Li, Xianting, 2017. "A comparative study and prediction of the liquid desiccant dehumidifiers using intelligent models," Renewable Energy, Elsevier, vol. 114(PB), pages 1023-1035.
    6. Kashish Kumar & Alok Singh & Saboor Shaik & C Ahamed Saleel & Abdul Aabid & Muneer Baig, 2022. "Comparative Analysis on Dehumidification Performance of KCOOH–LiCl Hybrid Liquid Desiccant Air-Conditioning System: An Energy-Saving Approach," Sustainability, MDPI, vol. 14(6), pages 1-22, March.

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