Research and Structural Optimizationof Hydrogel-based Desiccant-coated Heat Exchanger

LEI Xiaoping; ZHANG Hua; WANG Jiayun

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Research and Structural Optimizationof Hydrogel-based Desiccant-coated Heat Exchanger

更新时间：2025-02-21

- Research and Structural Optimizationof Hydrogel-based Desiccant-coated Heat Exchanger
- Moren Journal (2025)
- 作者机构：
  
  上海理工大学能源与动力工程学院,上海市上海市200093
- 作者简介：
- 基金信息：
- DOI：
  CLC： TQ 317;TK 172
- Received：08 November 2024，
  
  Revised：29 November 2024，
  
  Accepted：2024-12-11，
- 稿件说明：
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LEI Xiaoping, ZHANG Hua, WANG Jiayun. Research and Structural Optimizationof Hydrogel-based Desiccant-coated Heat Exchanger[J/OL]. Moren journal, 2025.
DOI：

LEI Xiaoping, ZHANG Hua, WANG Jiayun. Research and Structural Optimizationof Hydrogel-based Desiccant-coated Heat Exchanger[J/OL]. Moren journal, 2025. DOI：

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。为此，本文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、空气通道长度这三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0.4mm、翅片间距为2.2mm、空气通道长度为20mm时除湿性能最佳。和其他模型不同，本文的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除湿量增加了10.35g/kg

平均除湿率提升了48.65%，均达到了优化前的一倍以上。这为高效节能的除湿提供了可行的解决方案。

Abstract

Desiccant-coated heat exchangers (DCHE) play a very important role in the field of dehumidification. However

due to a lack of structural optimization and selection of operating conditions

the efficiency of current dehumidification technology needs to be improved. Therefore

this paper developed an efficient hydrogel composite material

set up a dehumidification experimental platform

and established a physical model of hydrogel-based desiccant-coated heat exchanger in COMSOL based on material characteristics. Three structural parameters

adsorbent coating thickness

fin spacing

and air channel length

were extracted

and the dehumidification performance was optimized and verified by experiments. The study found that the hydrogel-based desiccant heat exchanger had the best desiccant performance when the coating thickness was 0.4mm

the fin spacing was 2.2mm

and the air passage length was 20mm. Unlike other models

this model considers the coupling of multiple physical fields

including the humidity field

adsorbent adsorption volume field

and fluid temperature field in the heat exchanger

and the average desiccant amount increased by 10.35g/kg and the average desiccant rate was improved by 48.65% after structural optimization. This provides a feasible solution for efficient and energy-saving desiccant.

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references

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