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Falling film liquid desiccant air dehumidification

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Abstract

Falling film liquid desiccant dehumidification technology is attracting more and more attention due to lower energy consumption, less pollution, and more flexible humidity control in recent years. This paper conducts a comprehensive review on falling film liquid desiccant dehumidification systems. Firstly, the working principles and features of the liquid desiccant dehumidification are introduced to describe the dehumidification process. The existing liquid desiccants including organic and inorganic desiccants are reviewed. Then, the structures of falling film dehumidifiers including both adiabatic dehumidifiers and internally-cooled dehumidifiers are described. Besides, the simulation models of falling film dehumidifiers, such as finite difference models, effectiveness NTU (ε-NTU) models and simplified simulation models are summarized. Finally, the exiting performance enhancing methods of falling film dehumidifiers are collected, which provide valuable guidance to researchers and engineers to improve the dehumidification performance.

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Authors and Affiliations

  1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China

    Chuanshuai Dong & Lizhi Zhang

  2. School of Nuclear Engineering, Purdue University, 400 Central Drive, West Lafayette, IN, 47907-2017, USA

    Takashi Hibiki

  3. Renewable Energy Research Group, Department of Building Services Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, China

    Lin Lu

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  1. Chuanshuai Dong
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  2. Takashi Hibiki
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  3. Lizhi Zhang
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  4. Lin Lu
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Correspondence to Chuanshuai Dong.

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Dong, C., Hibiki, T., Zhang, L. et al. Falling film liquid desiccant air dehumidification. Exp. Comput. Multiph. Flow 2, 187–198 (2020). https://doi.org/10.1007/s42757-019-0036-8

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