Simulation Model for Borehole Heat Exchangers

Petri Hietaharju
Control Engineering, Faculty of Technology, University of Oulu, Finland

Tobias Boström
Department of Physics and Technology, UiT, The Arctic University of Norway, Norway

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp18153277

Ingår i: Proceedings of The 59th Conference on Simulation and Modelling (SIMS 59), 26-28 September 2018, Oslo Metropolitan University, Norway

Linköping Electronic Conference Proceedings 153:39, s. 277-283

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Publicerad: 2018-11-19

ISBN: 978-91-7685-494-5

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Seasonal thermal energy storage (STES) offers a solution to address the mismatch between production and consumption by storing the produced excess heat for later use. Borehole heat exchangers (BHEs) are one of the sensible STES technologies. In this paper, a long-term simulation model for BHEs was developed. A finite line-source model for the heat transfer outside the borehole and a quasi-3D model for the heat transfer inside the borehole were applied in two region simulation approach. Fast Fourier transformation technique together with a cubic spline interpolation method were used for faster simulation time with time varying loads and longer simulation periods. The simulation method was validated using experimental data. Results showed that the simulation model is able to accurately model ground and fluid temperature evolution.


ground heat exchangers, boreholes, modelling, simulation, validation


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