列管式相变储热单元的优化模拟

doi:10.12028/j.issn.2095-4239.2018.0160

储能科学与技术 ›› 2018, Vol. 7 ›› Issue (S1): 84-91.doi: 10.12028/j.issn.2095-4239.2018.0160

列管式相变储热单元的优化模拟

徐敬英^1,2, 王炜³, 黄云², 彭志坚¹, 李悦悦³, 姚华², 王培伦²

1 中国地质大学(北京)工程技术学院, 北京 100083;
2 中国科学院过程工程研究所, 北京 100190;
3 国网辽宁省电力有限公司沈阳供电公司, 辽宁沈阳 110003

收稿日期:2018-08-28 修回日期:2018-09-22 出版日期:2018-12-05 发布日期:2018-12-05
通讯作者: 彭志坚,教授,博士生导师,主要研究方向为陶瓷材料,E-mail:pengzhijian@cugb.edu.cn;黄云,研究员,硕士生导师,主要研究方向为储能与能源利用,E-mail:yunhuang@ipe.ac.cn。
作者简介:徐敬英(1994-),女,硕士研究生,主要研究方向为储热过程,E-mail:jyxu@ipe.ac.cn
基金资助:
国家重点研发计划项目（2017YFB0903601），中国科学院洁净能源先导科技专项资助（XDA21070302），江苏省科技成果转化专项资金资助项目（BA2016120），国家电网公司科技项目（SGLNSY00FZJS1801423）。

Optimization simulation of tube-type phase change heat storage unit

XU Jingying^1,2, WANG Wei³, HUANG Yun², PENG Zhijian¹, LI Yueyue³, YAO Hua², WANG Peilun²

1 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China;
2 Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
3 Shenyang Power Supply Company of State Grid Liaoning Electric Power Company Limited, Shenyang 110003, Liaoning, China

Received:2018-08-28 Revised:2018-09-22 Online:2018-12-05 Published:2018-12-05

摘要/Abstract

摘要： 列管式换热器具有结构牢固、传热面积大、材料使用适应性强等优点，是相变储热领域应用较为广泛的一种换热器。但由于大部分相变材料热导率偏低，导致换热器的换热性能较差，因此提高相变储热器的储热效率，是目前国内外研究的热点。本工作对列管式相变储热单元进行了二维非稳态模拟优化，研究了换热器结构、翅片数目及中心距3种参数对储热性能的影响，并探讨了熔化过程中相变材料的温度和液相率变化趋势。研究结果表明，与圆形换热器结构相比，正方形换热器储热性能更优；相比于无翅片的储热换热器，添加翅片后储热性能得到显著提升，相变材料熔化时间缩短66%；对中心距而言，在一定范围内，随中心距减小进出口降压增大，但储热性能相应提高。

关键词: 储热, 相变, 换热器, 性能优化

Abstract: Tube heat exchangers are widely used in the field of phase change heat storage because of their firm structure, large heat transfer area and strong adaptability to the use of materials. However, due to the low thermal conductivity of most phase change materials, the heat transfer performance of the heat exchanger is poor, so improving the heat storage efficiency of the phase change heat storage is a hot spot at home and abroad. In this paper, the two-dimensional unsteady simulation optimization was conducted to study the influences of the shape of the heat exchanger structure, the number of fins and the center distance on the thermal storage performance. And the change trend of temperature and liquid phase ratio of phase change materials during melting process is explored. The results show that the heat storage performance of square heat exchanger is better than that of the circular heat exchanger. Compared with the heat storage heat exchanger without fins, the heat storage performance of the heat storage heat exchanger is improved significantly, and the melting time of phase change material is shortened by 66%. Within a certain range, the pressure drop increases as the center distance decreases, but the heat storage performance increases accordingly.

Key words: heat storage, phase change material, heat exchanger, performance optimization

中图分类号:

TK02

徐敬英, 王炜, 黄云, 彭志坚, 李悦悦, 姚华, 王培伦. 列管式相变储热单元的优化模拟[J]. 储能科学与技术, 2018, 7(S1): 84-91.

XU Jingying, WANG Wei, HUANG Yun, PENG Zhijian, LI Yueyue, YAO Hua, WANG Peilun. Optimization simulation of tube-type phase change heat storage unit[J]. Energy Storage Science and Technology, 2018, 7(S1): 84-91.

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列管式相变储热单元的优化模拟

Optimization simulation of tube-type phase change heat storage unit

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