基于Fluent的地下U型埋管换热器传热温度场模拟分析

Simulation and Analysis of Heat transfer temperature Field of Underground U-tube Heat Exchanger based on Fluent

利用Gambit软件建立无限大区域内单U型埋管与土壤间模型,以河北省石家庄地区的土壤材料物性参数为依据,在Fluent数值模拟软件中对其设置为非稳态传热的三维数学模型,对地下传热运行工况进行长时间数值模拟计算,得出该地区太阳能耦合地源热泵系统间歇运行6年的土壤温度场分布规律,对距离埋管不同位置的土壤设置检测点,本文主要设置9个监测点,并且记录不同时刻该典型点具体温度,最终得出距离埋管距离越近的土壤温度变化速度和幅度也越大,且无论距离埋管距离远近,在每年系统运行结束后温度较前一年都有所升高。

The model of single U-type buried pipe and soil in infinite area was established by using columnar heat source model and Gambit software. The physical properties of soil materials in Shijiazhuang area of Hebei Province were taken as the basis. In the Fluent numerical simulation software, the 3D mathematical model of unsteady heat transfer is set up, and the long time numerical simulation of underground heat transfer operating condition is carried out.The distribution rule of soil temperature field of the solar coupled ground-source heat pump system in this area is obtained after 6 years of intermittent operation, and the detection points are set up for the soil at different locations from the buried pipe. In this paper, 9 monitoring points are mainly set up. And record the specific temperature of the typical point at different times. Finally, it is concluded that the closer the distance from the buried pipe, the greater the change speed and amplitude of the soil temperature, and whether the distance from the buried pipe is far or near, At the end of each year, the temperature of the system is higher than that of the previous year.