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Experimental study of a membrane-based liquid desiccant dehumidifier based on internal air temperature variation

Chu, Junze; Zhu, Jie; Bai, Hongyu; Cui, Yuanlong

Experimental study of a membrane-based liquid desiccant dehumidifier based on internal air temperature variation Thumbnail


Authors

Junze Chu

Hongyu Bai

Yuanlong Cui



Abstract

A membrane-based liquid desiccant dehumidifier with the separated air stream and liquid desiccant channels has the ability to solve its working fluid carryover problem in the traditional direct contact system. The sensible, latent, total effectiveness and air moisture removal rate are adopted for the dehumidifier performance evaluation in this paper, and the dehumidifier main operating parameters are investigated experimentally to identify their influences and internal air temperature variations, including inlet air relative humidity (RH), inlet solution concentration and temperature, heat capacity rate ratio (Cr*) and number of heat transfer units (NTU). It is found that both the inlet air RH and solution temperature have the negative influences on the dehumidifier effectiveness, while the desiccant solution concentration has little positive influence; the air moisture removal rate rises sharply with the inlet air RH and solution concentration. The highest sensible, latent and total effectiveness achieved in this study are 0.823, 0.802 and 0.810 respectively when both Cr* and NTU are equal to 12. However the operating condition with NTU=8 and Cr*=6 is recommended with the corresponding sensible, latent and total effectiveness of 0.758, 0.71 and 0.728 respectively.

Citation

Chu, J., Zhu, J., Bai, H., & Cui, Y. (2019). Experimental study of a membrane-based liquid desiccant dehumidifier based on internal air temperature variation. Applied Thermal Engineering, 159, Article 113936. https://doi.org/10.1016/j.applthermaleng.2019.113936

Journal Article Type Article
Acceptance Date Jun 7, 2019
Online Publication Date Jun 7, 2019
Publication Date Aug 1, 2019
Deposit Date Jun 11, 2019
Publicly Available Date Mar 29, 2024
Journal Applied Thermal Engineering
Print ISSN 1359-4311
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 159
Article Number 113936
DOI https://doi.org/10.1016/j.applthermaleng.2019.113936
Keywords Membrane based liquid desiccant dehumidifier; Temperature field; Performance evaluation; Experimental study
Public URL https://nottingham-repository.worktribe.com/output/2172747
Publisher URL https://www.sciencedirect.com/science/article/pii/S1359431119317909?via%3Dihub
Additional Information This article is maintained by: Elsevier; Article Title: Experimental study of a membrane-based liquid desiccant dehumidifier based on internal air temperature variation; Journal Title: Applied Thermal Engineering; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.applthermaleng.2019.113936; Content Type: article; Copyright: © 2019 Elsevier Ltd. All rights reserved.

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