高温固体蓄热装置充热特性研究与优化

doi:doi:10.19912/j.0254-0096.tynxb.2024-0881

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高温固体蓄热装置充热特性研究与优化

更新时间：2025-10-22

- 高温固体蓄热装置充热特性研究与优化
- Vol. 46, Issue 9, Pages: 342-350(2025)
- 作者机构：
- 作者简介：
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- DOI：doi:10.19912/j.0254-0096.tynxb.2024-0881
  CLC： TK02
- Published Online：14 October 2025，
  
  Published：2025
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[J]. 2025, 46(9): 342-350.
DOI：

[J]. 2025, 46(9): 342-350. DOI： doi:10.19912/j.0254-0096.tynxb.2024-0881.

摘要

以高温固体蓄热装置的典型蓄热单元为研究对象

基于蓄热单元典型充热特性

揭示传统结构的蓄热单元存在的传热缺陷

并针对该缺陷对蓄热单元的充热过程开展优化研究。结果表明

传统结构的蓄热单元在充热8 h后

蓄热砖内部存在显著的温度不均匀现象

内部温差最高达到约60 K。电加热丝的空间位置对蓄热单元内部温度分布的均匀性有显著影响

在3组不同尺寸的蓄热单元内均出现随电加热丝位置逐渐下移

温度均匀性逐渐变差的现象

当电加热丝位于空气流道中间位置时

蓄热单元内部最大温差仅为20 K。充热过程中

辐射换热为主要换热方式

最大约占总换热功率的95%。空气流道体积占比越大

蓄热单元温度均匀性越好

储能密度越低。

Abstract

The high-temperature solid heat storage device is made up of many heat storage units. Before investigating the whole heat storage device

the thermal characteristics of the unit should be revealed. In this paper

the heat transfer defect inside the heat storage device is revealed after analyzing its thermal characteristics. After 8 h of charging

the maximum temperature difference is about 60 K. The charging characteristic is influenced by the position of the heating element significantly. In 3 cases

the temperature distribution becomes worse as the heating element moves down. The heat storage unit has a minimum temperature difference of 20 K when the heating element is placed at the center of the unit. During charging

the radiation is the main heat transfer method

about 95% of heat is transferred by radiation. The air path volume proportion of the unit also influences the thermal characteristics. To get better temperature distribution

the proportion should be larger. But to get higher energy storage density

the proportion should be lower.

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