Research on heat transfer model of buried pipe heat exchanger based on equivalent physical properties of soil stratification
In this paper,considering the soil stratification and groundwater seepage,combined with the measured data,the fluid temperature inside the buried pipe and the thermophysical parameters of different layered soils are obtained through the calculation of the outer wall temperature of the buried pipe,so as to establish the heat transfer model of the buried pipe stratified according to the equivalent physical properties of the soil.The experimental results show that the strati-fied heat transfer model is closer to the measured value than the conventional homogeneous model,and the error is smaller;The average absolute error between the simulated outlet water temperature and the measured value is 0.21℃,and the average absolute error between the simulated inlet and outlet heat transfer temperature difference and the measured value is 0.14℃based on the equivalent physical properties of soil stratification,which has a high accuracy and can provide a basis for engineering design and serve as the basis for the subsequent optimization study of the bur-ied pipe heat transfer.
万方数据
维普
