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A numerical and experimental approach to the estimation of borehole thermal resistance in ground heat exchangers

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  • Yoon, Seok
  • Lee, Seung-Rae
  • Go, Gyu-Hyun

Abstract

This paper presents a numerical and experimental study on the evaluation of borehole thermal resistance with TRT (thermal response test) and TPT (thermal performance test) results observed in closed-loop vertical type boreholes with U and W type GHEs (ground heat exchangers). Field TRTs were carried out for 48 h on a closed-loop vertical type borehole, and an equivalent ground thermal conductivity was estimated using the infinite line source model. Closed-loop vertical type boreholes with U and W type GHEs and field ground conditions were numerically modeled using a three dimensional finite element method to estimate borehole thermal resistance and the TRT results were compared. Field TPTs were also conducted for 100 h continuously to calculate the heat exchange rate and borehole thermal resistance. The borehole thermal resistance values were compared with various analytical solutions, and the multipole and EQD (equivalent diameter) method produced results closer to those of the experimental and numerical analysis than the SF (shape factor) method.

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  • Yoon, Seok & Lee, Seung-Rae & Go, Gyu-Hyun, 2014. "A numerical and experimental approach to the estimation of borehole thermal resistance in ground heat exchangers," Energy, Elsevier, vol. 71(C), pages 547-555.
    • Handle: RePEc:eee:energy:v:71:y:2014:i:c:p:547-555
    DOI: 10.1016/j.energy.2014.04.104
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    Cited by:

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    4. Zhang, Xueping & Han, Zongwei & Ji, Qiang & Zhang, Hongzhi & Li, Xiuming, 2021. "Thermal response tests for the identification of soil thermal parameters: A review," Renewable Energy, Elsevier, vol. 173(C), pages 1123-1135.
    5. Zhang, Changxing & Song, Wei & Sun, Shicai & Peng, Donggen, 2015. "Parameter estimation of in-situ thermal response test with unstable heat rate," Energy, Elsevier, vol. 88(C), pages 497-505.
    6. Go, Gyu-Hyun & Lee, Seung-Rae & N.V., Nikhil & Yoon, Seok, 2015. "A new performance evaluation algorithm for horizontal GCHPs (ground coupled heat pump systems) that considers rainfall infiltration," Energy, Elsevier, vol. 83(C), pages 766-777.
    7. Javadi, Hossein & Mousavi Ajarostaghi, Seyed Soheil & Rosen, Marc A. & Pourfallah, Mohsen, 2019. "Performance of ground heat exchangers: A comprehensive review of recent advances," Energy, Elsevier, vol. 178(C), pages 207-233.
    8. Yoon, Seok & Lee, Seung-Rae & Kim, Min-Jun & Kim, Woo-Jin & Kim, Geon-Young & Kim, Kyungsu, 2016. "Evaluation of stainless steel pipe performance as a ground heat exchanger in ground-source heat-pump system," Energy, Elsevier, vol. 113(C), pages 328-337.
    9. Hu, Jinzhong, 2017. "An improved analytical model for vertical borehole ground heat exchanger with multiple-layer substrates and groundwater flow," Applied Energy, Elsevier, vol. 202(C), pages 537-549.
    10. Zhang, Changxing & Xu, Hang & Fan, Jianhua & Sun, Pengkun & Sun, Shicai & Kong, Xiangqiang, 2020. "The coupled two-step parameter estimation procedure for borehole thermal resistance in thermal response test," Renewable Energy, Elsevier, vol. 154(C), pages 672-683.
    11. Choi, Wonjun & Kikumoto, Hideki & Ooka, Ryozo, 2022. "Probabilistic uncertainty quantification of borehole thermal resistance in real-world scenarios," Energy, Elsevier, vol. 254(PC).
    12. So-Jung Lee & Jung-Chan Choi & Seunghun Baek & Tae-Hyuk Kwon & Hee-Hwan Ryu & Ki-Il Song, 2016. "Use of a Pre-Drilled Hole for Implementing Thermal Needle Probe Method for Soils and Rocks," Energies, MDPI, vol. 9(10), pages 1-10, October.
    13. Dai, L.H. & Shang, Y. & Li, X.L. & Li, S.F., 2016. "Analysis on the transient heat transfer process inside and outside the borehole for a vertical U-tube ground heat exchanger under short-term heat storage," Renewable Energy, Elsevier, vol. 87(P3), pages 1121-1129.
    14. Bi, Yuehong & Lyu, Tianli & Wang, Hongyan & Sun, Ruirui & Yu, Meize, 2019. "Parameter analysis of single U-tube GHE and dynamic simulation of underground temperature field round one year for GSHP," Energy, Elsevier, vol. 174(C), pages 138-147.

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