储能科学与技术 ›› 2015, Vol. 4 ›› Issue (2): 183-188.doi: 10.3969/j.issn.2095-4239.2015.02.009

• 研究与进展 • 上一篇    下一篇

列管式相变蓄热器性能强化的模拟

韩广顺1, 2, 王培伦1, 4, 金翼1, 黄云1, 丁红胜2, 丁玉龙3   

  1. 1 中国科学院过程工程研究所,北京 100190;
    2 北京科技大学,北京 100083;
    3 英国伯明翰大学,伯明翰 B15 2TT; 4中国地质大学（北京）,北京 100083
  • 收稿日期:2015-01-08 出版日期:2015-04-19 发布日期:2015-04-19
  • 通讯作者: 黄云,副研究员,从 事储能过程与能源材料等方面的研究,E-mail：yunhuang@ipe.ac.cn。
  • 作者简介:韩广顺（1988—）,男,硕士研究生,研究方向为储热过程与单元,E-mail：gshan@ipe.ac.cn
  • 基金资助:
    中国科学院重点部署项目（KGZD-EW-302-1）,国家自然科学基金中英联合储能项目（NSFC51361135702）

Numerical simulations on performance enhancement of a cross-flow latent thermal energy storage heat exchanger

HAN Guangshun1, 2, WANG Peilun1, 4, JIN Yi1, HUANG Yun1, DING Hongsheng2, DING Yulong3   

  1. 1 Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China;
    2 University of Science and Technology Beijing,Beijing 100083,China;
    3 University of Birmingham,Birmingham B15 2TT,UK;
    4 China University of Geosciences (Beijing),Beijing 100083,China
  • Received:2015-01-08 Online:2015-04-19 Published:2015-04-19

PDF

234

被引次数

3

摘要： 基于列管式换热器具有传热面积大、结构紧凑、操作弹性大等优点,使其在相变储能领域具有广阔的应用前景。本文建立一种新型列管式相变蓄热器模型,在不考虑自然对流的情况下,利用Fluent软件对相变蓄热器进行二维储热过程的数值模拟。本文主要研究斯蒂芬数、雷诺数、列管排列方式、肋片数以及相变材料的导热系数对熔化过程的影响,并对熔化过程中固液分界面的移动规律进行了分析。模拟结果表明,内肋片强化换热效果明显,特别是对应用低导热系数相变材料[导热系数小于1 W/(m·K)]的列管式蓄热器,相对于无肋片结构,加入肋片（Nfn=2）可缩短熔化时间52.6%。

关键词: 相变材料, 相变蓄热, 性能强化, 数值模拟

Abstract: Due to large heat transfer area, compact size and easy handling, cross flow tubular heat exchangers have a potential for a wide range of applications in latent heat energy storage. A two dimensional unsteady-state model is established for this type of heat exchangers contacting phase change materials (PCMs) to study the heat transfer behavior during phase change. Effects of various factors on the charging process are studied, including Stefan number, Reynolds number, thermal conductivity of PCM, arrangement of tubes, and the number of fins (Nfn). The motion of solid-liquid interface is analyzed. The results show that the heat transfer process can be significantly enhanced by the use of fins; The melting time of PCM in a two-fin unit could be reduced by 52.6% compared with a non-fin unit when the thermal conductivity of PCM is lower than 1.0 W/(m·K).

Key words: phase change material, latent heat storage, performance enhancement, numerical simulation

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