4.5 Article

Analytic models and effective resistances for coaxial ground heat exchangers

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Summary: In this study, a semi-analytical model is developed for evaluating heat transfer in coaxial borehole heat exchangers, taking into account geothermal gradient and heat capacities of different borehole components. The proposed model demonstrates better agreement with experimental data and OGS simulation results compared to existing models, particularly in capturing fluid temperature distributions during early stages of heat injection. Overall, the results validate the feasibility and efficiency of the proposed model.

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