Experimental analysis of a solar heating system with seasonal storage operated in first year

IF 6.9 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2025-02-21 DOI:10.1016/j.applthermaleng.2025.126033

Xiaoxia Li , lifeng Jin , Guobing Yuan , Zhifeng Wang , Jinping Li , Xiao Guo , Jing Zhao

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Abstract

Seasonal thermal energy storage technology has attracted widespread attention due to its ability to successfully solve the intermittent and seasonal fluctuations of solar energy, as well as the seasonal mismatch between solar energy and heating loads. Due to the significant differences in climatic conditions and heating characteristics between China and European countries, there are also significant differences in the operational characteristics of seasonal heat storage systems in China, with relatively few relevant cases. This paper presents experimental investigations on a solar heating system with seasonal thermal energy storage built in North China. The focuses of the investigation are performance assessment on the system during the first year and the dynamic operating characteristics of the main components. The experimental results showed that the charging efficiency of the seasonal thermal energy storage can reach about 72.0 % in heat storage season. The maximum daily average heat collection per aperture area of the concentrated solar thermal system can reach 2.5 kWh/m²/d in October with the highest solar radiation and running days. The solar fraction of the system reached 41.9 % in the first year. This experimental study serves as a reference for future research on solar heating system with STES, including system optimization design and control.

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季节性蓄热太阳能供热系统第一年运行的实验分析

季节性蓄热技术由于能够成功解决太阳能的间歇性和季节性波动，以及太阳能与供热负荷的季节性失配问题而受到广泛关注。由于中国与欧洲国家的气候条件和供暖特征存在显著差异，因此中国的季节性蓄热系统运行特征也存在显著差异，相关案例相对较少。本文介绍了华北地区季节性蓄热太阳能供暖系统的试验研究。调查的重点是第一年对系统的性能评估和主要部件的动态运行特性。实验结果表明，在蓄热季节，季节性蓄热的充电效率可达72.0%左右。在太阳辐射最高、运行天数最多的10月份，聚光太阳能热系统日平均孔径集热最大可达2.5 kWh/m2/d。第一年，该系统的太阳能比例达到41.9%。本实验研究可为后续STES太阳能供暖系统的优化设计和控制研究提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.