化工进展 ›› 2021, Vol. 40 ›› Issue (9): 5180-5194.DOI: 10.16085/j.issn.1000-6613.2020-2436

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相变微胶囊的制备及其在微通道的应用进展

高迪(), 王树刚(), 才晓旭, 王继红, 李宜轩   

  1. 大连理工大学建设工程学部,辽宁 大连 116024
  • 收稿日期:2020-12-03 修回日期:2021-01-06 出版日期:2021-09-05 发布日期:2021-09-13
  • 通讯作者: 王树刚
  • 作者简介:高迪(1997—),女,硕士研究生,研究方向为多相流及微通道换热。E-mail:1979057263@qq.com
  • 基金资助:
    国家自然科学基金(51678102)

Preparation of microencapsulated phase change material and its application in microchannels: a review

GAO Di(), WANG Shugang(), CAI Xiaoxu, WANG Jihong, LI Yixuan   

  1. Construction Engineering Department, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2020-12-03 Revised:2021-01-06 Online:2021-09-05 Published:2021-09-13
  • Contact: WANG Shugang

摘要:

相变微胶囊是一种性能良好、稳定性强的相变储能材料,其热导率偏低,但对相变微胶囊进行改性以及优化换热条件可以提高热导率。本文系统地介绍了相变微胶囊与改性相变微胶囊的制备方法,以及两者的区别。文章指出,对比分析可知,原位聚合法是制备改性相变微胶囊最常用的方法,对壁材进行改性是最常用的改性方法,并且在众多改性材料中氧化石墨烯是一种高导热、力学性能优异、稳定性强的改性材料。同时,文中对相变微胶囊和改性相变微胶囊在微通道换热器中的应用进行概述与总结,指出其中存在的问题:相变微胶囊与微通道换热器的结合,在提升换热效果的同时还存在着增加流动阻力和压降的问题。因此需要确定悬浮液流动的临界速度,充分发挥相变微胶囊与微通道换热器的优势。

关键词: 相变微胶囊, 改性, 制备, 复合材料, 石墨烯, 微通道

Abstract:

Microencapsulated phase change material (MEPCM) is a kind of phase change materials with good performance and strong stability, and its thermal conductivity is low. However, modification of phase change microcapsule and optimization of heat transfer conditions can improve the thermal conductivity. In this paper, the preparation methods of MEPCM and modified MEPCM were systematically introduced. In addition, the differences between them were also illustrated. Through comparative analysis, it can be concluded that in-situ polymerization was the most commonly used method to prepare modified MEPCM, and modification of wall materials was the most commonly used modification method. Moreover, among many modified materials, graphene oxide was a modified material with high thermal conductivity, excellent mechanical properties and strong stability. Besides, this paper summarized the application of MEPCM and modified MEPCM in microchannel heat exchanger. And it pointed out the problems that the combination of MEPCM with microchannel heat exchanger enhanced heat transfer effect but still increased the flow resistance and pressure drop. Therefore, in practical application, the critical flow velocity of a suspension needed to be determined in order to give full play to the advantages of MEPCM and microchannel heat exchanger.

Key words: microencapsulated phase change material(MEPCM), modification, preparation, composite, graphene, microchannel

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