A fast numerical approach for the horizontal ground heat exchanger

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022
Major/Subject
Mcode
Degree programme
Language
en
Pages
23
Series
Numerical heat transfer part a-Applications
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.
Description
Keywords
Horizontal ground heat exchanger, long-term operation, shape equivalence method, thermal response numerical model, THERMAL PERFORMANCE, SIMULATION, IMPROVEMENT
Other note
Citation
Tong, C, Li, X, Ge, X, Wang, H & Duanmu, L 2022, ' A fast numerical approach for the horizontal ground heat exchanger ', Numerical heat transfer part a-Applications, vol. 82, no. 1-2, pp. 8-30 . https://doi.org/10.1080/10407782.2022.2063644