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%。
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%.
作者
杨曙川
殷勇高
李晓
赵栋霖
崔梦颖
Yang Shuchuan;Yin Yonggao;Li Xiao;Zhao Donglin;Cui Mengying(School of Energy and Environment,Southeast University,Nanjing,210000,China;Hebei Zhuopai Renewable Energy Development Co.,Ltd.,Shijiazhuang,050000)
出处
《制冷学报》
北大核心
2025年第3期1-10,31,共11页
Journal of Refrigeration
关键词
跨季节储热
河水
峰谷电价
TRNSYS
seasonal thermal energy storage
river water
peak-valley electricity price
TRNSYS
作者简介
通信作者:殷勇高,男,教授,东南大学能源与环境学院,13611515279,E-mail:y.yin@seu.edu.cn。研究方向:溶液除湿及低品位热利用、新型热泵与空调系统节能、面向建筑碳中和的储能技术研究。
