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Performance Investigation of a Hollow Fiber Membrane-Based Desiccant Liquid Air Dehumidification System

Author

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  • Sebastian Englart

    (Faculty of Environmental Engineering, Wrocław University of Science and Technology, PL50377 Wrocław, Poland)

  • Krzysztof Rajski

    (Faculty of Environmental Engineering, Wrocław University of Science and Technology, PL50377 Wrocław, Poland)

Abstract

The membrane-based desiccant liquid air dehumidification system is a promising technology for efficient humidity control in buildings. The use of a membrane module allows, among other things, for a compact design with a relatively large heat and mass transfer area and eliminates carryover of solution droplets. In this paper, a cross-flow, hollow-fiber membrane module was proposed for air dehumidification and regeneration of lithium chloride. A two-dimensional heat and mass transfer model for cross-flow in a membrane module used for air dehumidification and liquid desiccant regeneration was developed. The effectiveness, moisture removal rate and moisture removal rate were studied numerically and validated against experimental results. Based on the numerical simulations, the most favorable ranges of operating conditions were determined. It was found that the operating conditions significantly impact the dehumidification performance. The proposed dehumidifier maintains its performance in a wide range of inlet air humidity ratios. For dehumidification, the recommended temperature of the incoming solution was in the range of 14–18 °C, while for regeneration the solution range was 40–50 °C. The packing fraction was suggested in the range of 0.30–0.40. These results can help design membrane-based liquid dehumidification systems.

Suggested Citation

  • Sebastian Englart & Krzysztof Rajski, 2021. "Performance Investigation of a Hollow Fiber Membrane-Based Desiccant Liquid Air Dehumidification System," Energies, MDPI, vol. 14(11), pages 1-20, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:11:p:3320-:d:569419
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    References listed on IDEAS

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    Cited by:

    1. Krzysztof Rajski & Ali Sohani & Sina Jafari & Jan Danielewicz & Marderos Ara Sayegh, 2022. "Energy Performance of a Novel Hybrid Air Conditioning System Built on Gravity-Assisted Heat Pipe-Based Indirect Evaporative Cooler," Energies, MDPI, vol. 15(7), pages 1-18, April.

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