Research and Structural Optimization of Hydrogel-Based Desiccant-Coated Heat Exchanger

Lei Xiaoping Zhang Hua Wang Jiayun

doi:10.12465/issn.0253-4339.20241108001

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Research and Structural Optimization of Hydrogel-Based Desiccant-Coated Heat Exchanger

更新时间：2026-03-30

- Research and Structural Optimization of Hydrogel-Based Desiccant-Coated Heat Exchanger
- Journal of Refrigeration Vol. 47, Issue 2, Pages: 112-122(2026)
- 作者机构：
  
  上海理工大学能源与动力工程学院上海 200093
- 作者简介：
- 基金信息：
- DOI：10.12465/issn.0253-4339.20241108001
  CLC： TQ317;TK172;TU834.9
- CSTR：XXXXX.XX.XXX.20241108001
- Received：08 November 2024，
  
  Revised：2024-11-29，
  
  Accepted：11 December 2024，
  
  Published：16 April 2026
- 稿件说明：
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雷小平,张华,王佳韵.凝胶基除湿换热器研究及结构优化[J].制冷学报,2026,47(02):112-122.

Lei Xiaoping Zhang Hua Wang Jiayun.Research and Structural Optimization of Hydrogel-Based Desiccant-Coated Heat Exchanger[J].Journal of Refrigeration,2026,47(02):112-122.
雷小平,张华,王佳韵.凝胶基除湿换热器研究及结构优化[J].制冷学报,2026,47(02):112-122. DOI： 10.12465/issn.0253-4339.20241108001. CSTR： XXXXX.XX.XXX.20241108001.

Lei Xiaoping Zhang Hua Wang Jiayun.Research and Structural Optimization of Hydrogel-Based Desiccant-Coated Heat Exchanger[J].Journal of Refrigeration,2026,47(02):112-122. DOI： 10.12465/issn.0253-4339.20241108001. CSTR： XXXXX.XX.XXX.20241108001.

摘要

除湿换热器（DCHE）在除湿领域发挥着非常重要的作用。然而，因缺少高效的吸附剂材料及除湿换热器的优化设计，当前除湿技术的效率有待提升。开发了高效的凝胶复合材料，搭建了除湿实验平台，并基于材料特性在COMSOL中建立了凝胶基除湿换热器物理模型，以吸附剂涂层厚度、翅片间距、空气通道长度这3个参数为主要研究对象，针对除湿性能进行了优化并完成实验验证。研究发现，凝胶基除湿换热器分别在涂层厚度为0.4 mm、翅片间距为2.2 mm、空气通道长度为20 mm时除湿性能最佳。模型考虑了空气湿度场、吸附剂吸附量场和换热器流体温度场等多物理量场的耦合，综合结构优化后的模型平均脱湿量增加了10.35 g/kg（干空气），平均除湿率提升了48.65%，均达到了优化前的一倍以上。

Abstract

Desiccant-coated heat exchangers （DCHEs） play an important role in dehumidification. However， considering the ineffective structural optimization and selection of operating conditions， the efficiency of the current dehumidification technology needs improvement. Therefore， in this study， an efficient hydrogel composite material was developed， a dehumidification experimental platform was established， and a physical model of a hydrogel-based desiccant-coated heat exchanger was developed in COMSOL based on the material characteristics. Three structural parameters， including adsorbent coating thickness， fin spacing， and air channel length， were extracted. The dehumidification performance was optimized and experimentally verified. The study determined that the hydrogel-based desiccant heat exchanger had the best dehumidification performance when the coating thickness was 0.4 mm， fin spacing was 2.2 mm， and air passage length was 20 mm. Unlike other models， this model considers the coupling of multiple physical fields， including the humidity field， adsorbed water fraction field， and fluid temperature field in the heat exchanger. The moisture removal capacity increased by 10.35 g/kg （dry air）， and the moisture removal rate improved by 48.65% after structural optimization.

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