地下水渗流作用下地埋管间歇散热特性
Temperature responsive characteristics of soil to intermittent heat emission of a single heat exchanger with groundwater advection

为了探求地下水渗流对地埋管换热器间歇运行性能所产生的影响，基于移动的有限长线热源理论模型解析解，利用MATLAB软件编程计算，分析渗流对单钻孔地埋管换热器的影响。同时对比分析了连续和间歇运行情况下其周围土壤的温度响应特征和过余温度场分布特点。研究表明：埋管周围土壤的温度变化是由热流密度、土壤本身的热物性和实际渗流速度耦合作用影响的，而在间歇运行下其因素影响更加明显。
n order to estimate the impact of groundwater advection on the performance of borehole heat exchangers under the intermittent operational mode, the solution of soil temperature response were programmed on the basis of the moving line heat source model and superposition principle by using MATLAB. The heat transfer processes of single borehole in the soil under the intermittent operational and continuous operational modes under the influence of groundwater advection were analyzed. Results show that the temperature change in the soil around borehole is influenced by the coupling of pipe heat flux, the soil thermal physical properties and the real advection velocity andespecially under the intermittent operation, the effect was significant.