相变储能强化传热技术的研究进展

doi:10.12028/j.issn.2095-4239.2019.0137

摘要/Abstract

摘要： 相变储能是通过相变材料吸/放热过程来实现能量储存的技术，它能够解决热量供需时间、空间和强度上的不匹配，并以其高储能密度成为储能领域的研究热点，但由于相变材料的热导率较低，使其应用受到限制。针对相变储能材料熔化/凝固过程中热导率低引起的传热速率慢的问题，从优化储能设备结构、添加剂提高相变材料热导率以及联合强化传热技术三方面综述国内外相变材料储能强化传热技术的最新进展。通过比较各种强化传热方式的优劣，实验和模拟均显示复合强化传热即可解决相变材料热导率低，又增大传热面积，从而提高相变材料的传热性能；多孔金属作为导热添加剂增强导热效果更好；并提出了相变储能强化传热技术未来需要解决的相关技术难题。

关键词: 热传导, 多孔介质, 复合材料, 储能, 优化, 纳米材料

Abstract: Phase change energy storage is a technology to realize energy storage through the absorption/release of latent heat during phase change processes. It can balance the mismatch of heat supply and demand in time, space and intensity. It has become the focus of attention in the field of energy storage due to its high energy storage density. However, its application is limited because of the low thermal conductivity of phase change materials. Aiming at the problem of slow heat transfer rate caused by low thermal conductivity of phase change materials in the melting/solidification process, this paper reviews the latest progress of phase change materials heat transfer enhancement research at home and abroad from three aspects:optimizing the structure of energy storage devices, improving the thermal conductivity of phase change materials with additives, and their combination. By comparing the advantages and disadvantages of various heat transfer enhancement methods, both experiments and simulations show that the combined heat transfer enhancement can solve the problems of low thermal conductivity and increase heat transfer area, thus improves the heat transfer performance of phase change materials; Porous metal materials as thermal conductive additives enable better thermal conductivity enhancement. The related technical problems to be solved in future for phase change energy storage technology to enhance heat transfer are also put forward.

Key words: heat conduction, porous media, composites, thermal energy storage, optimization, nanomaterials

中图分类号:

TB34

金光, 肖安汝, 刘梦云. 相变储能强化传热技术的研究进展[J]. 储能科学与技术, 2019, 8(6): 1107-1115.

JIN Guang, XIAO Anru, LIU Mengyun. Research progress on heat transfer enhancement technology of phase change energy storage[J]. Energy Storage Science and Technology, 2019, 8(6): 1107-1115.

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