储能科学与技术 ›› 2019, Vol. 8 ›› Issue (2): 347-356.doi: 10.12028/j.issn.2095-4239.2018.0215

• 研究开发 • 上一篇    下一篇

不同形式相变储热换热器的对比分析

李洋1,2, 王彩霞2, 宗军2, 杨智舜3, 陈丽华3, 韩雨辰2, 张玮2   

  1. 1 浙江大学电气工程学院, 浙江 杭州 310027;
    2 国家电投集团科学技术研究院有限公司太阳能技术研究所, 北京 102206;
    3 浙江大学航空航天学院流体机械及工程学院, 浙江 杭州 310027
  • 收稿日期:2018-10-30 修回日期:2018-12-05 出版日期:2019-03-01 发布日期:2019-03-01
  • 作者简介:李洋(1986-),男,博士研究生,工程师,从事相变储热产品开发与热工水力计算工作,E-mail:liyang@spic.com.cn

A comparative analysis of different heat exchangers containing phase change materials

LI Yang1,2, WANG Caixia2, ZONG Jun2, YANG Zhixun3, CHEN Lihua3, HAN Yuchen2, ZHANG Wei2   

  1. 1 Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China;
    2 Department of Solar Energy Technology Research, State Power Investment Corporation Central Research Institute, Beijing 102206, China;
    3 Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2018-10-30 Revised:2018-12-05 Online:2019-03-01 Published:2019-03-01

摘要: 针对日益严重的环境问题,“煤改电”已经成为实现北方清洁供暖的有效手段。此外,我国每年在余热利用,尤其是在中低温品质热能利用上还相当不充分。在此大背景下,以相变储热供热技术为切入点,着重对目前相变储热换热器进行了比较,定性分析了板式、管壳式、热管式及其他异形(储热砖/球)换热器的优缺点。并通过数值模拟的方式,定量比较了相同换热面积及边界条件下,管壳式和板式相变换热的二维相变材料熔化模型,管壳式换热器需6 h完全熔化,板式换热器需8.5 h完全熔化,主要原因在于二者在换热管/板在排布上差异导致。但考虑到相较于管壳式换热器,板式换热器结构紧凑、加工工艺简单、拆卸方便,未来可形成通过制成储热砖的方式实现模块化运行,为后期维护提供了很大便利,因此具有巨大发展潜力。

关键词: 相变储热, 换热器, 对比分析

Abstract: This work is motivated by the following two aspects. First, replacement of coal firing to electrical heating has become an effective means to achieve clean heating in the north part of China to combat increasingly serious environmental problems. Second, China's annual use of waste heat, especially in the medium and low temperature ranges, is still inadequate. For both the aspects, the phase change material-based heat storage technology has a great role to play. This article aims to compare heat exchangers consisting of phase change materials. First, a qualitative comparison was made between plate, shell-and-tube, heat pipe and other specially designed heat exchangers (heat storage bricks/balls). Numerical simulations were then carried out using a two-dimensional phase change material melting model for shell-and-tube and plate heat exchangers with the same heat exchange area and boundary conditions. The results showed that the shell-and-tube heat exchanger took about 6 hours to completely melt, and 8.5 hours were needed for the plate heat exchanger mainly due to the difference in the arrangement of the heat exchange tubes/plates. However, the plate heat exchanger is still regarded to have a great potential due to more compact structure, simpler manufacture process and easier to assemble/disassemble, and easier modularization for scale-up.

Key words: phase change heat storage, heat exchanger, contrastive analysis

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