储能科学与技术 ›› 2013, Vol. 2 ›› Issue (5): 480-485.doi: 10.3969/j.issn.2095-4239.2013.05.005

• 研究及进展 • 上一篇    下一篇

高温填充床相变储热球的储热特性

李传1, 孙泽1, 2, 丁玉龙1, 3   

  1. 1 英国利兹大学过程环境材料学院,英国 利兹 LS2 9JT;
    2 华东理工大学资源与环境工程学院,上海 200237;
    3 中国科学院过程工程研究所,北京 100190
  • 收稿日期:2013-07-20 修回日期:2013-08-06 出版日期:2013-10-19 发布日期:2013-10-19
  • 通讯作者: 丁玉龙,教授,研究方向为储能系统,储能过程中多相流动与传热强化,无机中高温复合储能材料,深冷(液化)空气储能,压缩空气储能等,E-mail:ylding@mail.ipe.ac.cn / y.ding@leeds.ac.uk.
  • 作者简介:李传(1986--),男,博士研究生,研究方向为相变储热系统的储热特性研究与优化设计,E-mail:pmlch@leeds.ac.uk;
  • 基金资助:
    国家科技支撑计划课题(2012BAA03B03),中国科学院重点部署项目(KGZD-EW-302-1),国家留学基金(CSC)及英国EPSRC(EP/F060955/1)项目

A numerical investigation into the charge behaviour of a spherical phase change material particle for high temperature thermal energy storage in packed beds

LI Chuan1, SUN Ze1, 2, DING Yulong1, 3   

  1. 1 School of Process,Environmental and Materials Engineering,University of Leeds,Leeds LS2 9JT,UK;
    2 School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China;
    3 Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
  • Received:2013-07-20 Revised:2013-08-06 Online:2013-10-19 Published:2013-10-19

PDF

730

被引次数

12

摘要： 基于高温相变材料,对填充床储热系统中储热单元球体的储热性能进行了模拟研究.研究了不同传热流体温度和球体直径对球体储热性能的影响规律,对导热为主的相变储热过程与导热和自然对流共同作用的相变储热过程进行了比较分析,同时还探讨了高温辐射换热的影响.结果表明,相变时间随球体直径的增大而增大,随传热流体温度的增大而减小.当考虑相变区域自然对流时,总的相变时间显著减少,和单纯导热相比,完全相变时间缩短了近16%.在导热和自然对流的基础上加上辐射传热后可以看出,辐射换热强化了球体内的传热过程,加快了相变材料的熔化速度,强化了自然对流的作用.

关键词: 相变材料, 高温储热系统, 传热, 储热特性, 模型

Abstract: This paper is concerned about the charge behavior of a spherical phase change material (PCM) particle for high temperature thermal energy storage in a packed bed. A numerical modeling approach is used in the work. The influences of heat transfer fluid (HTF) temperature, PCM particle size and heat transfer modes (conduction only, combined conduction and natural convection and thermal radiation) on the behavior are examined. The results show that the melting time increases with an increase in the PCM particle size or a decrease in the HTF temperature. Inclusion of the natural convection effect in the PCM region leads to a reduction in the melting time by about 16%. Thermal radiation at the boundary accelerates the melting process of the PCM and intensifies the natural convection.

Key words: phase change material, high temperature thermal energy storage, heat transfer, modeling

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