Evaluation of Charging and Discharging Performance for Longitudinally Finned Cylindrical Latent Heat Thermal Energy Storage Unit

ZHANG Zhongbin; YANG Jianuo; {{custom_author.name_en}}

doi:10.13334/j.0258-8013.pcsee.242076

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Evaluation of Charging and Discharging Performance for Longitudinally Finned Cylindrical Latent Heat Thermal Energy Storage Unit

更新时间：2026-10-12

- Evaluation of Charging and Discharging Performance for Longitudinally Finned Cylindrical Latent Heat Thermal Energy Storage Unit
- Vol. 46, Issue 6, Pages: 2483-2493(2026)
- 作者机构：
  
  东北电力大学能源与动力工程学院,吉林市,吉林省,132012
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.242076
  CLC：
- Received：20 March 2026，
  
  Published：2026
- 稿件说明：
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ZHANG Zhongbin, YANG Jianuo, {{custom_author.name_en}}. Evaluation of Charging and Discharging Performance for Longitudinally Finned Cylindrical Latent Heat Thermal Energy Storage Unit[J]. 2026, 46(6): 2483-2493.
DOI：

ZHANG Zhongbin, YANG Jianuo, {{custom_author.name_en}}. Evaluation of Charging and Discharging Performance for Longitudinally Finned Cylindrical Latent Heat Thermal Energy Storage Unit[J]. 2026, 46(6): 2483-2493. DOI： 10.13334/j.0258-8013.pcsee.242076.

摘要

相变蓄热技术作为一种高效的热能储存方式，在提高能源利用效率和推动可再生能源技术发展方面具有重要意义。为优化肋片对于水平套管式相变装置蓄放热性能的影响，该文通过数值模拟的方法，对4种不同直肋布置方式的相变装置进行蓄放热性能的对比研究。比较各组模型的液相率变化、平均温度分布、储能速率、蓄放热时间及蓄放热㶲效率等评价指标，系统分析不同肋片布置方式对相变装置蓄、放热性能的影响。结果表明，在相同工况下，4种布置方式(Case1、Case2、Case3和Case4)的总蓄放热㶲效率分别为52%、57%、53%和53.3%，对应的总蓄放热时间分别为3 428、2 699、3 383和3 153 s。其中，Case2可显著提高相变装置的总蓄放热㶲效率并有效缩短蓄放热所需要的时间，表现出最佳的蓄、放热性能。研究结果可为水平套管式相变装置的设计改进和高效运行提供一定的理论依据与技术支持。

Abstract

Phase change thermal energy storage technology

as a highly efficient thermal energy storage solution

is critical for improving energy utilization and advancing renewable energy technologies. This study employs numerical simulations to investigate the impact of four distinct straight-fin configurations on the charging and discharging performance of the latent heat thermal energy storage (LHTES) unit. Comprehensive evaluations are conducted based on key performance metrics

including liquid fraction evolution

average temperature distribution

energy storage rate

charging and discharging durations and exergy efficiencies

to systematically assess the thermal performance of each configuration. The results indicate that

under identical operating conditions

the total charging and discharging exergy efficiencies for the four configurations (Case1

Case2

Case3

and Case4) are 52 %

57 %

53 %

and 53.3 %

respectively

with corresponding total charging and discharging times of 3428

2699

3383

and 3153s. Among them

Case2 exhibits the best overall performance by significantly enhancing the total exergy efficiency and reducing the charging and discharging times. These findings provide valuable theoretical guidance and technical support for optimizing design and improving operational efficiency of the LHTES unit.

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