Moisture adsorption performance investigation on double layer multi-stage desiccant packed bed under different conditions

Fuquan He, Wansheng Yang, Sihui Huang, Xiaofeng Wang, Biao Yan and Xudong Zhao

Energy, 2025, vol. 324, issue C

Abstract: The development of new solid desiccant beds and further research on dehumidification performance are essential for enriching the structure forms of desiccant bed and promoting energy saving. A solid dehumidifier called double layer multi-stage desiccant bed (DL-MS-DB) is proposed in this research. The bed is mainly composed of two dehumidification units and five-stage dehumidification modules. The effect of different inlet air conditions, and material layer thickness on moisture adsorption performance of DL-MS-DB was investigated experimentally. Results reveal that moisture adsorption performance of DL-MS-DB is more sensitive to the inlet air humidity than the temperature. Higher inlet air velocity would lead to a reduction in transient dehumidification capacity. Material layer thickness has a significant impact on the dehumidification performance. Maximum dehumidification rate of DL-MS-DB could reach 5.22 kg/h. The temperature rise of desiccants under different conditions ranges from 15.8 °C to 24.4 °C. Under similar conditions, the dehumidification capacity of the DL-MS-DB is 23.8 % and 6.5 % higher than that of the double-stage dehumidification box and three-stage adsorption packed bed, respectively. Compared to conventional desiccant wheel and multilayer fixed-bed, the dehumidification capacity of DL-MS-DB increases by 63.5 % and 20.2 %, respectively in an initial period. DL-MS-DB could reveal superior dehumidification performance.

Keywords: Solid dehumidification; Solid desiccant; Multi-stage solid dehumidification packed bed; Moisture adsorption performance; Comparative analysis (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:324:y:2025:i:c:s0360544225016366

DOI: 10.1016/j.energy.2025.135994

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