地埋管换热影响因素数值模拟研究

Numerical simulation study on the influencing factors of heat transfer in buried pipes

采用OGS数值模拟软件建立地埋管换热数值基准模型,通过控制变量对地层导热系数、回填料导热系数、地埋管埋深、管径、管内循环液流速及地下水渗流条件的差异模型进行了恒定流换热及输入负荷换热模拟,对模拟结果分析比对,验证了上述因素对地埋管换热影响的相关性,本次模拟研究结果对吉林省浅层地热能开发利用具有一定的参考与指导意义,并提出了地埋管地源热泵开发过程中相应建议。

The OGS numerical simulation software was used to establish a numerical benchmark model for buried pipe heat transfer.The constant flow heat transfer and input load heat transfer were simulated by controlling variables on the difference model between the thermal conductivity of the formation,the thermal conductivity of the backfill material,the buried depth of the buried pipe,the pipe diameter,the flow rate of the circulating fluid in the pipe,and the groundwater seepage conditions.The simulation results were analyzed and compared,and the correlation between the above factors on the heat transfer of the buried pipe was verified,the results of this simulation study have certain reference and guiding significance for the development and utilization of shallow geothermal energy in Jilin Province,and put forward corresponding suggestions for the development of ground source heat pump with buried pipes.