上海地区地源热泵系统对地质环境热影响的模拟分析

Simulation analysis of heat influence of ground-source heat pump system on geological environment in Shanghai

根据上海地区某实际工程的实测数据,将土层概化为7层,并建立了物理模型。对冷热负荷不平衡条件下地源热泵系统运行10a后的换热区土壤温度场特征进行了模拟分析。结果表明,10a后换热区平均土壤温度升高约2.44℃,土壤温度升幅随土层深度的增加逐渐减小;换热区热扩散半径随时间呈直线增加,10a后平均热扩散半径为20m左右,浅部土层热扩散半径较大。

Based on the test data of a project in Shanghai,sets up a physical model with the soil stratum being generalized for seven slices.Simulates and analyses the soil temperature field characteristics in heat transfer region after ten years’operation under unbalance conditions between cooling load and heating load.The results show that the average soil temperature in heat transfer region will raise 2.44 ℃after ten years,the amplitude decreases with the soil depth,the heat-affected radius linearly increases with time.The mean heat-affected radius is about 20 m after ten years.The heat-affected radius of shallow soil stratum is greater.