A fast numerical approach for the horizontal ground heat exchanger

Cang Tonga Institute of Building Environment and Facility Engineering, Dalian University of Technology, Liaoning, P.R. China;

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Xiangli Lia Institute of Building Environment and Facility Engineering, Dalian University of Technology, Liaoning, P.R. China; Correspondence[email protected]
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Xingjie Gea Institute of Building Environment and Facility Engineering, Dalian University of Technology, Liaoning, P.R. China; View further author information

Haichao Wanga Institute of Building Environment and Facility Engineering, Dalian University of Technology, Liaoning, P.R. China; ;b Department of Mathematics and Systems Analysis, Aalto University, School of Science, Espoo, Uusimaa, FinlandView further author information

Lin Duanmua Institute of Building Environment and Facility Engineering, Dalian University of Technology, Liaoning, P.R. China; View further author information

Abstract

A fast thermal response numerical (TRN) approach for horizontal ground heat exchanger (HGHE) was developed and verified. The shape equivalence method was used to process the shapes of pipe cross section and elbows, reducing the meshing difficulty and the grid quantity of HGHE. A series of geometric equivalent quantization values were presented. Meanwhile, a semi-analytical equation was derived to reduce the sensitivity of the TRN model to the time step. The simulation results show the calculation speed of the TRN model is 38.98 times that of the Fluent model in the same case. Furthermore, long-term operations of HGHE were simulated, revealing that the soil around HGHE has good heat recovery capacity.

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Funding

This study was supported by the National Natural Science Foundation of China (Grant No. 52078097).

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A fast numerical approach for the horizontal ground heat exchanger

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A fast numerical approach for the horizontal ground heat exchanger

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