太阳能直驱直储耦合地源热泵系统运行分析研究

Operation Analysis of Solar Direct Drive and Direct Storage Coupled Ground Source Heat Pump System

针对严寒地区建筑采用传统地源热泵系统会造成土壤温度逐年下降的问题,本文提出一种太阳能直驱直储耦合地源热泵系统,基于TRNSYS建立系统仿真模型,探究长期运行下系统性能变化趋势。结果表明:系统运行一年后储热管群和换热管群土壤温度分别升高1.6℃和0.4℃,改善了严寒地区土壤温度低的问题。运行5年后机组COP和系统COP分别达到了3.87和3.56,分别较系统运行第一年提高9%和8%。

In view of the problem that the traditional ground source heat pump system used in buildings in severe cold regions will cause the soil temperature to drop year by year,a solar direct drive and direct storage coupled ground source heat pump system is proposed in this paper.Based on TRNSYS,the system simulation model is established to explore the changing trend of system performance under long-term operation.The results show that the soil temperature of heat storage tube group and heat exchange tube group increases by 1.6℃and 0.4℃respectively after one year of operation,which improves the problem of low soil temperature in severe cold regions.After 5 years of operation,COP of unit and COP of system reached 3.87 and 3.56,respectively,which increased by 9%and 8%compared with the first year of system operation.