储能科学与技术 ›› 2021, Vol. 10 ›› Issue (2): 514-522.doi: 10.19799/j.cnki.2095-4239.2020.0415

• 储能材料与器件 • 上一篇    下一篇

一种螺旋翅片式相变储热单元的储热优化模拟

王君雷1,2(), 徐祥贵1, 孙通1,2, 姚华1,3, 宋民航1,3, 王燕1,3, 黄云1,3()   

  1. 1.中国科学院过程工程研究所多相复杂系统国家重点实验室，北京 100190
    2.中国科学院大学，北京 100049
    3.中科院过程工程研究所南京绿色制造产业创新研究院，江苏 南京 211135
  • 收稿日期:2020-12-25 修回日期:2021-01-11 出版日期:2021-03-05 发布日期:2021-03-05
  • 通讯作者: 黄云 E-mail:jlwang18@ipe.ac.cn;yunhuang@ipe.ac.cn
  • 作者简介:王君雷（1993—），男，硕士研究生，研究方向为储热技术，E-mail：jlwang18@ipe.ac.cn；
  • 基金资助:
    国家重点研发计划项目(2017YFB0903601);中国科学院战略性先导科技专项(XDA21070302);多相复杂系统国家重点实验室自主研究课题(MPCS-2019-A-10);中科院过程工程研究所南京绿色制造产业创新研究院项目(E0010712)

Simulation of heat storage process in spiral fin phase change heat storage unit

Junlei WANG1,2(), Xianggui XU1, Tong SUN1,2, Hua YAO1,3, Minghang SONG1,3, Yan WANG1,3, Yun HUANG1,3()   

  1. 1.State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
    2.University of Chinese Academy of Sciences, Beijing 100049, China
    3.Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211135, Jiangsu, China
  • Received:2020-12-25 Revised:2021-01-11 Online:2021-03-05 Published:2021-03-05
  • Contact: Yun HUANG E-mail:jlwang18@ipe.ac.cn;yunhuang@ipe.ac.cn

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摘要：

列管式换热器在相变储热领域应用广泛，但由于部分相变材料热导率偏低，导致相变换热器的换热性能较差，因此提高相变储热单元的换热效率从而缩短固液相变时间是研究重点之一。本文开展列管式相变储热单元储热过程的三维非稳态模拟工作，研究了翅片型式、螺旋翅片厚度、数目及螺旋周期对储热性能的影响规律，并探讨了相变材料熔化过程中平均温度、液相率以及储热量的变化趋势。模拟结果表明，与平板翅片相比，螺旋翅片储热单元熔化时间可缩短12.21%；随着螺旋翅片的厚度、数目、螺旋周期增加，虽储热量略降，但相变材料的熔化时间缩短，换热性能不断提升。

关键词: 储热, 换热器, 性能优化, 数值模拟, 螺旋翅片

Abstract:

Tubular heat exchangers are widely used in phase change heat storage, but heat transfer is usually poor because of the low thermal conductivity of phase change materials (PCM). Therefore, improving the heat transfer efficiency of the phase change heat storage unit and shortening the solid-liquid phase change time are the focus of this research. In this paper, a three-dimensional unsteady simulation was conducted to study the influences of the fin structure, thickness, number, and spiral cycle on the heat storage performance. The mean temperature, liquid fraction, and heat storage of the PCM during the melting process were also discussed. The simulation results showed that the melting time of the PCM of the spiral fin heat storage unit was shortened by 12.21% compared with that of the flat fin. With the increase in the thickness, number, and spiral cycle of spiral fins, the amount of heat storage slightly reduces. However, the PCM melting time was shorter, and the heat transfer performance was improved continuously.

Key words: heat storage, phase change heat exchanger, performance optimization, spiral fin

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