储能科学与技术 ›› 2022, Vol. 11 ›› Issue (7): 2151-2160.doi: 10.19799/j.cnki.2095-4239.2022.0057

• 储能材料与器件 • 上一篇    下一篇

管束式相变蓄热器的蓄放热性能分析

叶文兰1(), 赵明2(), 胡明禹1, 田扬1   

  1. 1.上海理工大学能源与动力工程学院
    2.上海市动力工程多相流动与传热重点实验室，上海 200093
  • 收稿日期:2022-02-03 修回日期:2022-02-20 出版日期:2022-07-05 发布日期:2022-06-29
  • 通讯作者: 赵明 E-mail:1748987644@qq.com;lightzm@usst.edu.cn
  • 作者简介:叶文兰（1997—），男，硕士研究生，主要研究方向为强化传热传质及高效换热器，E-mail：1748987644@qq.com；
  • 基金资助:
    国家自然科学基金项目(51306120)

Analysis of heat storage and release performance of tube bundle phase change heat accumulator

Wenlan YE1(), Ming ZHAO2(), Mingyu HU1, Yang TIAN1   

  1. 1.School of Energy and Power Engineering, University of Shanghai for Science and Technology
    2.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
  • Received:2022-02-03 Revised:2022-02-20 Online:2022-07-05 Published:2022-06-29
  • Contact: Ming ZHAO E-mail:1748987644@qq.com;lightzm@usst.edu.cn

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摘要：

建立多排管束式相变储热单元模型，数值模拟了方腔中不同管子数量、不同排列方式以及不同管壁温度对相变储热单元蓄放热性能的影响。结果表明，在保持填充PCM数量不变及其他相同约束条件下，随着管子数量增加即排列方式改变时，可以增强自然对流作用，增大圆管与周围流体传热面积，而且其对应的液相曲线初期几乎呈线性变化，随着管子数量的增加，曲线斜率逐渐增大。表明排列方式的改变可以加快PCM熔化和凝固过程，大大提高其蓄放热性能。此外管壁温度对蓄放热性能也存在重要影响，但随着管壁温度的升高，影响逐渐减弱。

关键词: 多排管束, 蓄热器, 排列方式, 管壁温度, 数值模拟

Abstract:

The model of multi row tube bundle phase change heat storage unit is developed, and the effects of a varying number of tubes in the square cavity, as well as various arrangement approaches and tube wall temperatures on the heat storage and release of phase change heat storage unit are numerically simulated. The findings reveal that the natural convection can be improved and the heat transfer area between the circular tube and the surrounding fluid can be increased, with an increasing number of tubes, that is, the change of the arrangement mode and the corresponding liquid phase curve almost changes linearly at the first, and the curve's slope increases gradually with the number of tubes' increase. The findings reveal that the arrangement's change can hasten the melting and solidification process of PCM and substantially improve its heat storage and release performance. Additionally, the pipe wall temperature also has a crucial effect on the heat storage and release performance, but the influence decreases with the pipe wall temperature's increase.

Key words: multi row tube bundle, heat accumulator, arrangement mode, pipe wall temperature, numerical simulation

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