储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 338-346.doi: 10.12028/j.issn.2095-4239.2018.0159

• 研究开发 • 上一篇    下一篇

高温相变储热换热装置仿真建模及分析

徐桂芝1, 胡晓1, 金翼1, 杨岑玉1, 李传2, 丁玉龙2   

  1. 1 全球能源互联网研究院有限公司, 北京 102209;
    2 伯明翰大学, 英国 伯明翰 B15 2TT
  • 收稿日期:2018-08-27 修回日期:2018-12-04 出版日期:2019-03-01 发布日期:2018-12-25
  • 通讯作者: 胡晓。E-mail:odelette_huxiao@sina.com
  • 作者简介:徐桂芝(1976-),女,硕士,教授级高工,主要研究方向为新型储能与能源转化、柔性输电技术领域。E-mail:xuguizhi@geiri.sgcc.com.cn
  • 基金资助:
    国家电网公司总部科技项目《700℃以上高温相变储热关键技术研究》(SGRIDLKJ(2015)1000)

Simulation modeling and analysis of a high temperature phase change heat storage and exchange device

XU Guizhi1, HU Xiao1, JIN Yi1, YANG Cenyu1, LI Chuan2, DING Yulong2   

  1. 1 Global Energy Interconnection Research Institute Co., Ltd, Beijing 102209, China;
    2 University of Birmingham, Birmingham B15 2TT, UK
  • Received:2018-08-27 Revised:2018-12-04 Online:2019-03-01 Published:2018-12-25

摘要: 相变储热因单位体积储热量大,储热和放热过程温度基本恒定等优点而成为目前研究的热点。相变过程中涉及固液两相间融化和凝固的传热问题,其储放热过程是一个复杂的非稳态相变过程。本文对高温相变储热换热装置进行换热特性研究,通过研究储热单元的换热特性,基于FLUENT软件,结合装置的设计参数和相变复合材料的物性参数,对相变储热系统储/放热过程中内部的温度分布、传热速率和储放热效率进行了数学建模及模拟分析,重点研究了不同传热流体速度对单元储/放热性能的影响规律。根据仿真结果,在相变储热装置的设计中,可选择合适的空气流速,以实现不同的散热功率及储放热时间,满足不同用户的用热需求。物理实验表明仿真结果偏差较小,可为高温相变储换热装置设计、优化等工作提供依据。

关键词: 相变储能, 储热装置, 数值模拟

Abstract: Phase change heat storage has become a research hot spot in recent years because of high storage capacity per unit volume, and constant heat storage/release process. In this paper, the heat transfer characteristics of a high temperature phase change heat storage unit are studied. The temperature distribution, heat transfer rate and heat storage efficiency during heat storage and release processes are studied using the computational fluid dynamics in FLUENT software environment. The mathematical modeling and simulation analysis focus on the effect of different heat transfer fluid velocity on the performance of the heat storage and release processes. The results show that an appropriate air velocity can be selected to achieve different heat discharge power and heat storage time, to meet various demands of different end users. Physical experiments are carried out, showing that the deviation of simulation results is small from experimental measurements.

Key words: phase change energy storage, energy storage devices, numerical simulation

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