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

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

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: Jun 8, 2020
• Journal: Applied Thermal Engineering
• Print ISSN: 1359-4311
• Electronic ISSN: 1873-5606
• 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.
• Contract Date: Jun 11, 2019