Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers

Yang Shuchuan; Yin Yonggao; Li Xiao; Zhao Donglin; Cui Mengying

doi:10.12465/j.issn.0253-4339.2025.03.001

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Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers

Energy Storage Technology | 更新时间：2025-05-30

- Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers
- Journal of Refrigeration Vol. 46, Issue 3, Pages: 1-10(2025)
- 作者机构：
  
  1.东南大学能源与环境学院　南京　 210000
  2.河北卓派新能源开发有限公司　石家庄　 050000
- 作者简介：
  
  Yin Yonggao, male, professor, School of Energy and Environment, Southeast University, 86-13611515279, E-mail: y.yin@seu.edu.cn. Research fields: solution dehumidification and low-grade heat utilization, energy-saving of new heat pumps and air conditioning systems, energy storage technology for building carbon neutrality.
- 基金信息：
- DOI：10.12465/j.issn.0253-4339.2025.03.001
  CLC： TK02;TK01⁺9
- Received：14 December 2024，
  
  Revised：31 December 2024，
  
  Accepted：03 January 2025，
  
  Published：16 June 2025
- 稿件说明：
移动端阅览
Yang Shuchuan, Yin Yonggao, Li Xiao, et al. Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers[J]. Journal of refrigeration, 2025, 46(3): 1-10.
DOI：

Yang Shuchuan, Yin Yonggao, Li Xiao, et al. Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers[J]. Journal of refrigeration, 2025, 46(3): 1-10. DOI： 10.12465/j.issn.0253-4339.2025.03.001.

摘要

热泵技术因其电热转换的高效性已成为中低温供暖领域的主要路径。然而北方冬季缺少稳定热源，因此需要将城市范围内的热源进行跨季节存储，以保证热泵系统供暖的稳定性。基于馆陶地区河水跨季节/天储热工程，利用TRNSYS搭建仿真模型，在固定场地面积限制下对蓄热体各参数进行敏感性分析，并对跨天储热的配置与策略进行优化。结果表明：运行10 a后，蓄热体温升达到3.2 ℃，有效防止了土壤热失衡；埋管间距与深度对系统性能影响最大，当间距为4 m、深度为150 m时，总管长可减小约23%。此外跨天储热应匹配谷电储热量与释热负荷，避免谷电浪费，当制热功率大时，可增大水箱容积并考虑平电释热，以提高谷电利用率，优化后年运行费用减少11.2%。

Abstract

Heat pump technology has become an essential solution in the field of medium- and low-temperature heating due to its superior efficiency in converting electrical energy into thermal energy. However

owing to the lack of stable heat sources during winter in northern China

it is necessary to store the heat sources within the urban area throughout the seasons to ensure the stability of the heat provided by the heat pump system. In this study

based on the project of seasonal/daily thermal storage of river water in Guantao

a simulation model was constructed using the Transient System Simulation Tool (TRNSYS). A sensitivity analysis of the thermal energy storage unit parameters was conducted under the constraint of the fixed site area. The configurations and strategies of the daily thermal energy storage were optimized. The results show that the temperature rise of the thermal energy storage unit reaches 3.2 ℃ after 10 years of operation

effectively preventing the soil heat imbalance. The distance between the buried pipes and the depth had the greatest influence on the performance of the system. The total length of the pipes could be reduced by approximately 23% with a spacing of 4 m and a depth of 150 m. The daily thermal energy storage system should be matched to the valley power storage heat and heat release load to avoid wasting the valley power. If the storage heat power is large

the volume of the storage tank can be increased

and the flat power heat release is considered. The optimized system improves the utilization rate of valley power and reduces annual operating costs by 11.2%.

关键词

Keywords

references

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Related Author

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Related Institution

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