Simulation-Based Mathematical Modeling of Borehole Heat Exchanger Thermal Performance for Ground Source Heat Pumps
Toleukhanov A. Belyayev Y. Botella O. Yerdesh Y. Amanzholov T.
June 2025Springer
Journal of Mathematical Sciences (United States)
2025#291Issue 2323 - 335 pp.
This study presents a numerical and experimental investigation of the thermal performance of borehole heat exchangers for ground source heat pump systems. A 3D model was developed for heat and mass transfer in soil and grout, coupled with 1D conductive and convective heat transfer through the pipe and circulating fluid. The model was implemented in COMSOL Multiphysics and validated using thermal response test data obtained from two 50 m-deep boreholes drilled in the Almaty region of Kazakhstan. The root-mean-square deviation between model predictions and TRT data was 0.184°C. The thermal conductivity of the soil (λg = 2.35W/mK) and thermal resistance (Rb = 0.20mK/W) were determined. Simulation results showed that spiral borehole heat exchangers provided the highest heat extraction and reduced drilling depth by 34.6% compared to single U-type. The model aids in optimizing borehole heat exchanger geometry and evaluating material properties for enhanced thermal efficiency.
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Satbayev University, 22, Satbaev St, Almaty, 050013, Kazakhstan
Al-Farabi Kazakh National University, 71, Al-Farabi Av, Almaty, 050040, Kazakhstan
Université de Lorraine, CNRS, LEMTA, Nancy, F-54000, France
Satbayev University
Al-Farabi Kazakh National University
Université de Lorraine
10 лет помогаем публиковать статьи Международный издатель
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