کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1742480 | 1521928 | 2011 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Transient 3D analysis of borehole heat exchanger modeling Transient 3D analysis of borehole heat exchanger modeling](/preview/png/1742480.png)
This paper presents the development and application of a three-dimensional (3D) numerical simulation model for U-tube borehole heat exchangers (BHEs). The proposed model includes the thermal capacities of the borehole components, viz., the fluid inside the tubes, as well as the grouting material, making it possible to consider the transient effects of heat and mass transports inside the borehole. In this approach, the use of simplified thermal resistance and capacity models (TRCMs) provides accurate results while substantially reducing the number of nodes and the computation time compared with fully discretized computations such as finite element (FE) models. The model is compared with a fully discretized FE model which serves as a reference. Furthermore, the model is used to evaluate thermal response test (TRT) data by the parameter estimation technique. Comparison of the model results with the results of an analytical model based on the line-source theory further establishes the advantage of the developed 3D transient model, as the test duration can be shortened and results are more accurate.
► Development of a 3D numerical simulation model for U-tube borehole heat exchangers.
► Precise results of transient computations and short computation time.
► The model is used to evaluate TRT data by the parameter estimation technique.
► TRT duration can be shortened compared to line source evaluation.
► TRT evaluation results are more accurate due to 3D modeling.
Journal: Geothermics - Volume 40, Issue 4, December 2011, Pages 250–260