Study of Dynamic Moisture Adsorption and Desorption Performance of Thermosensitive Composite Adsorbents

Wang Weining; Zheng Xu; Yi Zhixiang; Hu Peng

doi:10.12465/j.issn.0253-4339.2025.04.029

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Study of Dynamic Moisture Adsorption and Desorption Performance of Thermosensitive Composite Adsorbents

更新时间：2025-08-28

- Study of Dynamic Moisture Adsorption and Desorption Performance of Thermosensitive Composite Adsorbents
- Journal of Refrigeration Vol. 46, Issue 4, Pages: 29-35(2025)
- 作者机构：
  
  浙江理工大学建筑工程学院　杭州　310018
- 作者简介：
  
  Zheng Xu, female, Ph. D., Director of Institute of Building Energy Utilization and Carbon Emission Reduction, School of Civil Engineering, Zhejiang University of Science and Technology, 86-571-86843374, E-mail: cindy1989v@zstu.edu.cn. Research fields: building energy efficiency, solid dehumidification air conditioning and composite adsorbent synthesis.
- 基金信息：
  
  the Natural Science Foundation of Zhejiang Province, China(51806195)
- DOI：10.12465/j.issn.0253-4339.2025.04.029
  CLC： TB64;TQ424
- Received：01 December 2024，
  
  Revised：19 December 2024，
  
  Accepted：26 January 2025，
  
  Published：16 August 2025
- 稿件说明：
移动端阅览
Wang Weining, Zheng Xu, Yi Zhixiang, et al. Study of Dynamic Moisture Adsorption and Desorption Performance of Thermosensitive Composite Adsorbents[J]. Journal of refrigeration, 2025, 46(4): 29-35.
DOI：

Wang Weining, Zheng Xu, Yi Zhixiang, et al. Study of Dynamic Moisture Adsorption and Desorption Performance of Thermosensitive Composite Adsorbents[J]. Journal of refrigeration, 2025, 46(4): 29-35. DOI： 10.12465/j.issn.0253-4339.2025.04.029.

摘要

随着经济的不断发展，全球正面临着日益严重的淡水短缺和能源匮乏危机。降低空调系统中处理热湿负荷的能耗和解决全球性缺水问题成为亟需关注的重大议题。吸附剂的动态吸脱附性能对吸附式空气取水系统和除湿换热器空调系统的热湿传递特性具有重要影响。对掺杂纳米铜粉、纳米银粉和纳米石墨烯等不同导热材料的温敏复合材料的动态吸附和脱附性能进行了研究，并对最优材料的理论日产水能力展开分析。结果表明：掺杂纳米石墨烯的温敏材料具有良好的吸/脱附动力学，其平衡吸附量达到了2.51 g/g，是未掺杂导热材料时的1.46倍；60 min内的解吸量是未掺杂导热材料时的1.17倍。在循环时间为3 h，吸附/解吸时间比为2∶1时，掺杂纳米石墨烯的温敏材料达到7.02 g/（g·d）的理论日产水量，相比未掺杂导热材料时提高了21%。

Abstract

With continuous economic development

the world faces a growing freshwater shortage and energy scarcity crisis. Reducing energy consumption in handling heat and moisture loads in air-conditioning systems and solving the global water crises have become urgent priorities. The dynamic adsorption and desorption properties of adsorbents significantly affect the heat and moisture transfer characteristics of adsorptive atmospheric water-harvesting systems and dehumidifying heat-exchanger air-conditioning systems. In this study

the dynamic adsorption and desorption properties of thermosensitive composites doped with different thermally conductive nanomaterials

such as nano-copper powder

nano-silver powder and nanographene

were investigated

and the theoretical daily water production capacity of the optimal materials was analyzed. The results show that the thermosensitive materials doped with graphene nanopowder have good adsorption/desorption kinetics. Their equilibrium adsorption capacity reaches 2.51 g/g

which is 1.46 times higher than the undoped thermally conductive materials. The desorption within 60 min is 1.17 times higher than undoped thermally conductive materials. In addition

with a cycle time of 3 h and an adsorption-to-desorption time ratio of 2∶1

the thermosensitive material doped with nanographene can achieve a theoretical daily water volume of 7.02 g/(g·d)

which is 21% higher than that of the undoped material.

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Study on adsorption kinetics of thermosensitive adsorbents and its application in dehumidification and atmospheric water harvesting

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