固体填充床储热性能实验与模拟研究

刘琰; 章颢缤; 叶成梁; 俞明锋; 张磊; 温航宇

doi:doi:10.19912/j.0254-0096.tynxb.2025-0258

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固体填充床储热性能实验与模拟研究

更新时间：2025-12-10

- 固体填充床储热性能实验与模拟研究
- Issue 11, Pages: 136-143(2025)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2025-0258
  CLC： K513
- Published Online：04 December 2025，
  
  Published：04 December 2025
- 稿件说明：
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刘琰, 章颢缤, 叶成梁, et al. 固体填充床储热性能实验与模拟研究[J]. 2025, (11): 136-143.
DOI：

刘琰, 章颢缤, 叶成梁, et al. 固体填充床储热性能实验与模拟研究[J]. 2025, (11): 136-143. DOI： doi:10.19912/j.0254-0096.tynxb.2025-0258.

摘要

为研究卧式固体颗粒填充床系统的储热性能

搭建以空气作为传热介质的实验装置

对储/放热过程的热力学特性和压降变化进行了实验与数值模拟研究。结果表明

填充床储放热效率达到95.5%

热空气入流速度从0.40 m/s增至1.96 m/s时

储罐有效利用率提高15个百分点

储热时间缩短70%。运行过程中

填充床顶部出现沉降现象

导致后段填充床提前加热

整体储热量降低。通过在床层顶部设置合理插入深度的挡板

可有效缓解空气旁路问题。当储热滞后系数k=1时

空气层与填充床温度场推移速度一致

此时挡板插入深度最优。

Abstract

To investigate the thermal storage performance of horizontal packed-bed systems filled with solid particles

an experimental setup was established using air as the heat transfer medium. Experimental and numerical studies were conducted to analyze the thermodynamic characteristics and pressure drop variations during the charging and discharging processes. Results showed that the round-trip efficiency of the packed bed reached 95.5%. When the inlet airflow velocity increased from 0.40 m/s to 1.96 m/s

the effective utilization rate improved by 15 percentage points

and the storage duration decreased by 70%. During operation

a top-layer settling phenomenon occurred in the packed bed

leading to premature heating of the downstream section and a reduction in overall thermal storage capacity. By installing baffles with an optimal insertion depth at the top of the bed

the impact of air bypass could be effectively mitigated. When the thermal storage lag coefficient

the propagation speed of the temperature field in the air layer matched that in the packed bed

achieving the optimal baffle insertion depth.

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