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

WANG Weining; ZHENG Xu; YI Zhixiang; HU Peng

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

更新时间：2025-02-24

- Study on adsorption kinetics of thermosensitive adsorbents and its application in dehumidification and atmospheric water harvesting
- Journal of refrigeration (2025)
- 作者机构：
  
  浙江理工大学建筑工程学院,浙江省杭州市310018
- 作者简介：
- 基金信息：
  
  the Natural Science Foundation of Zhejiang Province, China(51806195);the National Natural Science Foundation of China(LY22E060004)
- DOI：
  CLC： TB64
- Received：01 December 2024，
  
  Revised：2024-12-19，
  
  Accepted：26 January 2025，
- 稿件说明：
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WANG Weining, ZHENG Xu, YI Zhixiang, et al. Study on adsorption kinetics of thermosensitive adsorbents and its application in dehumidification and atmospheric water harvesting[J/OL]. Journal of refrigeration, 2025.
DOI：

WANG Weining, ZHENG Xu, YI Zhixiang, et al. Study on adsorption kinetics of thermosensitive adsorbents and its application in dehumidification and atmospheric water harvesting[J/OL]. Journal of refrigeration, 2025. DOI：

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湿热负荷的能耗和解决全球性缺水问题成为了我们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有着重要影响。本文对掺杂纳米铜粉、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研究，并对最优材料的理论日产水能力展开分析。研究结果表明，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。此外，在循环时间为3h，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 kg/(kg·d)的理论日产水量，相比未掺杂导热材料时提高了21%。

Abstract

With the continuous development of the economy

the world is facing a growing crisis of freshwater shortage and energy scarcity. Reducing the energy consumption of handling heat and moisture loads in air-conditioning systems and solving the global water scarcity problem have become major issues that we need to pay urgent attention to. The dynamic adsorption and desorption properties of adsorbents have a significant impact on the heat and moisture transfer characteristics of adsorptive atmospheric water harvesting systems and dehumidifying heat exchanger air-conditioning systems. In this paper

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

such as nano-copper powder

nano-silver powder and nano-graphene

are investigated

and the theoretical daily water production capacity of the optimal materials is analyzed. The results show that the thermosensitive materials doped with graphene nanopowder have good adsorption/desorption kinetics

and their equilibrium adsorption reaches 2.51 g/g

which is 1.46 times higher than that of the undoped thermally conductive materials; and the desorption within 60 min is 1.17 times higher than that of the undoped thermally conductive materials. In addition

when the cycle time is 3h and the adsorption/desorption time ratio is 2:1

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

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

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Keywords

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