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

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

更新时间：2025-02-08

- Practice and Optimization of Seasonal/Daily Composite Thermal Energy Storage Technology Based on Lakes/Rivers
- Journal of refrigeration (2025)
- 作者机构：
  
  1.东南大学能源与环境学院,江苏省南京市210000
  2.河北卓派新能源开发有限公司,河北省石家庄市050000
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK02;TK01+9
- Received：14 December 2024，
  
  Revised：2024-12-31，
  
  Accepted：03 January 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/OL]. Journal of refrigeration, 2025.
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/OL]. Journal of refrigeration, 2025. DOI：

摘要

在低/零碳供暖背景下，热泵技术因其电热转换的高效性，成为中低温供暖领域的必然路径。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。针对当前热源存在的局限性、跨天蓄热考虑的不足，本文基于馆陶地区河水跨季节/天储热工程，利用TRNSYS搭建了跨季节/天仿真模型，研究了系统的长期运行性能，并对埋管间距、河水流量、水箱容积进行了匹配优化。结果表明：运行10年后，蓄热体温升达到3.2℃，储热效率上升到98%。针对蓄热体设计方面，在采用大蓄热体与较大流量配置时，获得相同热量的耗功更小。在水箱设计方面，合适的水箱容积与控制策略可以更大程度发挥谷电利用的优势。经过优化后的跨季节/天系统相较跨季节系统可减少约28.7%的运行费用，具备良好的经济效益。

Abstract

In the context of low/zero-carbon heating

heat pump technology has emerged as the inevitable path in the field of medium and low-temperature heating due to their high efficiency in electrical-to-thermal energy conversion. However

due to the lack of stable heat sources in northern winter

it is necessary to store the heat sources within the urban area across seasons to ensure the stability of heating provided by the heat pump system. To address the current limitations of heat sources and the inadequate consideration of daily heat storage

this paper combines the seasonal/daily heat storage project of river water in the Guantao

builds a modeling and simulation platform by using TRNSYS

studies the system's long-term operation performance

and matches and optimizes the buried pipe spacing

river water flow rate

and water tank volume. The results show that after 10 years of operation

the temperature rise of the thermal storage unit reaches 3.2°C

and the heat storage efficiency rises to 98%. For the design of the thermal storage unit

under the large thermal storage unit and larger river water flow

the power consumption to obtain the same heat is smaller. For the tank design

the right tank volume and control strategy can avoid more initial investment and energy consumption. The optimized seasonal/daily thermal storage system can reduce the annual operating cost by about 28.8% compared to the seasonal thermal storage system

which has a good economic benefit.

关键词

Keywords

references

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School of Environmental Science and Engineering, Huazhong University of Science and Technology

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