Structural design and performance analysis of a new type of heat accumulator

doi:10.16085/j.issn.1000-6613.2024-1436

Abstract

Abstract:

Regenerator is widely used in gas waste heat recovery and its structure determines the efficiency of waste heat recovery. Therefore, the aim of this study was to propose an improved design scheme of multi-layer plate regenerator by comparing the numerical simulation analysis, and systematically discuss its structural optimization and performance characteristics. The heat transfer process of regenerator was simulated by the method of fluid-solid-heat coupling. The different opening forms (such as through hole, double hole and double half hole), the influence on gas flow, temperature distribution and pressure distribution in regenerator were mainly analyzed. The results showed that reasonable increase of the opening could not only improve the uniformity of the internal temperature of the regenerator, but also enhance the overall thermal performance. The design of double-hole structure had prominent advantages in reducing pressure loss, improving heat storage efficiency and enhancing heat transfer capability. In addition, this paper also provided an efficient and feasible technical path for the optimal design of the new-type regenerator structure.

Key words: heat storage, waste heat recovery, thermal-fluid-solid coupling analysis, structural optimization

摘要：

蓄热体广泛应用于瓦斯余热回收，其结构决定了余热回收效率。因此本研究旨在通过对比数值模拟分析，提出了一种改进的新型多层板式蓄热体设计方案，系统性地对其结构优化与性能特征进行了深入探讨。采用流固热耦合的方法对蓄热体的传热过程进行了数值模拟，重点分析了不同开孔形式（如通孔、双孔、双半孔）对蓄热体内气体流动、温度分布和压力分布的影响。研究结果显示，合理增加开孔不仅有助于改善蓄热体内部温度的均匀性，还能有效增强整体热性能。双孔结构的蓄热效果显著优于其他形式，其设计在减少沿程压力损失、提高蓄热效率以及增强热量传递能力方面具有突出的优势。此外，本文还为新型蓄热体结构优化设计提供了一种高效且可行的技术路径。

关键词: 蓄热, 余热回收, 流固热耦合, 结构优化

CLC Number:

TK02

YANG Junhui, YUAN Jun, ZHANG Jida, WANG Jinhai, QIAO Hongbin, CAI Zhenyi, MA Zhongcheng. Structural design and performance analysis of a new type of heat accumulator[J]. Chemical Industry and Engineering Progress, 2024, 43(S1): 282-294.

杨俊辉, 袁君, 张继达, 王金海, 乔红斌, 蔡振义, 马中成. 新型蓄热体结构设计及性能分析[J]. 化工进展, 2024, 43(S1): 282-294.

Figures/Tables 27

References 24

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简称	开孔形式	开孔位置	开孔直径
Origin	无开孔	—	—
Case1-1	通孔	25%、50%、75%	4mm
Case1-2	通孔	25%、50%、75%	5mm
Case1-3	通孔	25%、50%、75%	6mm
Case2-1	双孔	25%、50%、75%	2mm
Case2-2	双孔	16.7%、33.3%、50%、66.7%、83.3%	2mm
Case2-3	双孔	12.5%、25%、37.5%、50%、62.5%、75%、82.5%	2mm
Case1-1	双通孔	25%、50%、75%	4mm
Case1-2	双通孔	25%、50%、75%	5mm
Case1-3	双通孔	25%、50%、75%	6mm

简称	开孔形式	开孔位置	开孔直径
Origin	无开孔	—	—
Case1-1	通孔	25%、50%、75%	4mm
Case1-2	通孔	25%、50%、75%	5mm
Case1-3	通孔	25%、50%、75%	6mm
Case2-1	双孔	25%、50%、75%	2mm
Case2-2	双孔	16.7%、33.3%、50%、66.7%、83.3%	2mm
Case2-3	双孔	12.5%、25%、37.5%、50%、62.5%、75%、82.5%	2mm
Case1-1	双通孔	25%、50%、75%	4mm
Case1-2	双通孔	25%、50%、75%	5mm
Case1-3	双通孔	25%、50%、75%	6mm

网格数	升温/K	误差/%
2500000	776	—
3200000	781	0.69
5000000	786	0.64
6000000	788	0.25
7000000	789	0.13

网格数	升温/K	误差/%
2500000	776	—
3200000	781	0.69
5000000	786	0.64
6000000	788	0.25
7000000	789	0.13

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