中文摘要：

基于流场、温度场多场问题的有限元方法，对非等温管道流动的浅层地源热泵这一工程技术进行了数值模拟分析。首先，在假定的基础上给出了地源热泵多场问题的数学控制方程，然后利用COMSOL Multiphysics有限元软件建立了相应数值模型，对地源热泵的相关施工参数影响进行了分析。结果表明：随埋深增加，地埋管出水温度增加，每延米管长换热功率减少；地埋管内径越小，其出水温度越低，每延米管长换热功率也减小。两管靠得越近，两者之间的热阻就越小，导致热短路现象，进而影响进水管温度。随着导热系数的增大，出水温度将降低，每延米管长换热功率将增大，在回填材料导热系数小于或略大于岩土体导热系数时，使用好的导热系数圃填材料在提高每延米管长换热功率效果方面比较明显，这种效果在进一步提高回填材料导热系数时将趋缓。

英文摘要：

In view of the engineering technology of the ground source heat pump based on the non-isothermal pipe flow, finite element method based on flow field and temperature field is used to simulate it. Firstly, these control equations for the ground source heat pump＇s problems are presented. Then, a related model is established by using finite element software called COMSOL Multiphysics. And the influence of construction parameters are analyzed. The research results show that with the increase of buried depth, temperature of water coming from tubesincreases and the thermal power per linear meter decreases. W hen cttstam：~ t,~ pipes gets closer, the thermal resistance gets smaller, which leads to thermal short-circuiting, affecting the temperature of the inlet pipe. With the increase of the coefficient of thermal conductivity, the temperature of outlet water decreases while the thermal power per linear meter increases. When the backfill material＇s coefficient of thermal conductivity is less than or slightly＇ higher than that of rock soil mass, using backfill materials which have high coefficient of thermal conductivity can greatly improve thermal power per meter. But this effect will slow down when further improving the backfill material＇s coefficient of thermal conductivity.