Research on enhancing deep dehumidification by constructing a double-effect synergistic process in an air-cooled desiccant dehumidifier

Lin Liu, Lisheng Deng, Jun Li, Yu Bai, Zhaohong He, Xiaofeng Guo, Yugo Osaka, Mitsuhiro Kubota and Hongyu Huang

Renewable Energy, 2025, vol. 251, issue C

Abstract: Inherent properties of adsorption isotherm itself often restrict the dehumidification capacity of single desiccant. By leveraging the complementarities in the effective humidity range and regeneration temperature between silica gel and EMM-8, the dual desiccants dehumidifier with a double-effect synergistic process was established in this study to enhance deep dehumidification capacity. In order to explore its superiority, a numerical parametric study was conducted to compare dehumidification performance from a comprehensive view of energy and exergy between single silica gel and dual desiccants dehumidifiers via a validated numerical model. Results indicated that with a few exceptions, the dual desiccants dehumidifier is superior in the indices of dehumidification performance, and it is always able to easily reduce air humidity ratio to below the deep dehumidification threshold of 0.0062 kg/kg. Besides, at the regeneration air temperature of 90 °C, the minimum outlet air humidity ratio Ya1,ad,out_min and effective deep dehumidification time teff reach 0.0024 kg/kg and 189s, achieving an air dew point temperature of minus 6 °C. Under the optimal cooling air flow arrangement, the moisture removal capacity MRC and the second law efficiency η reach their maximum of 0.0053 kg/kg and 0.167, respectively, with the dehumidification coefficient of performance DCOP of 1.42.

Keywords: Deep dehumidification; Heat and mass transfer; Solid desiccant dehumidifier; Cross-flow heat exchanger; Air-conditioning (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014812501078X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:251:y:2025:i:c:s096014812501078x

DOI: 10.1016/j.renene.2025.123416

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().