A Three-Dimensional Numerical Model and Experimental Research for U-Tube Ground Heat Exchanger in Heating Operation
REN Xiao-hong,SUN Chun-wu,HU Yan-hui
DOI:10.11835/j.issn.1674-4764.2004.05.020
Received ,Revised January 10, 2004, Accepted , Available online July 01, 2015
Volume ,2004,Pages 90-95
- Abstract
In terms of the theory of a transient energy balance on the finite controlled volume, in this paper, a transient three-dimensional heat transfer model for the simulation of a single vertical U-tube ground heat exchanger based on finite-difference methods is systematically proposed. The model is also compared with experimental results during the heating operation in winter. What's more,based on test data and domestic and foreign literature, the equations to determine the undisturbed ground temperature for wet and heavy soil in Chongqing are presented. These formulae are essential conditions to calculate the heat transfer model.