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

Author

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

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.

Suggested Citation

  • He, Fuquan & Yang, Wansheng & Huang, Sihui & Wang, Xiaofeng & Yan, Biao & Zhao, Xudong, 2025. "Moisture adsorption performance investigation on double layer multi-stage desiccant packed bed under different conditions," Energy, Elsevier, vol. 324(C).
    • Handle: RePEc:eee:energy:v:324:y:2025:i:c:s0360544225016366
    DOI: 10.1016/j.energy.2025.135994
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