中文摘要：

通过工程实例,建立相应的物理及数学模型,划分出相应的网格。根据能量守恒定律,从土壤侧考虑,把流入土壤的热量进行均分得到恒定热流,以得到的恒定热流作为边界条件。模拟计算得出在不同工况下20年后土壤温度场温度分布,并且计算得出土壤侧的换热效率,通过不同监测点的温度分布状况,以及平均温度、最高温度变化情况,分析热堆积的基本特点。通过分析使用冷却塔后的土壤分布状况、土壤最高温度处效率改变,从而为以后探讨不同运行模式埋地换热器效率奠定基础,并且为采用不同方法平衡热堆积提供了思路。

英文摘要：

Combined with the engineering cases, both the physical and mathematical models are established, and the grid is divided. Analyzed from the soil, used the constant heat flux as the boundary condition. After operating 20 years, the soil temperature field with different conditions was obtained. The efficiency of heat exchanger is calculated. The temperature of different points and characteristics of heat accumulation are analyzed, This would be helpful for us to get the efficiency of heat exchangers with different conditions and eliminate heat accumulation.