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Numerical Study of heat transfer performance of geothermal pile-foundation heat exchanger in ground source heat pump system
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Numerical Study of heat transfer performance of geothermal pile-foundation heat exchanger in ground source heat pump system
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Journal Article
Numerical Study of heat transfer performance of geothermal pile-foundation heat exchanger in ground source heat pump system
2025
Overview
To evaluate the thermal conductivity performance of geothermal pile-based heat transfer units utilized within ground source heat pump (GCHP) frameworks, we developed physical models encompassing both solitary pile-based heat transfer devices and assemblies of such units. A thorough examination was conducted into the heat exchange mechanics and efficacy of these devices, covering both refrigerating and warming operational modes. For the purpose of simulating the heat transfer processes within a 3×3 array of energy piles, a real-world scenario involving an office building situated in Nanjing was adopted. Utilizing DeST software, we calculated the annual dynamic building load, which spans the cooling period, the heating period, and the two intervening transition periods. Following a simulated ten-year operational lifespan, it was noted that the average soil temperature exhibited an increase under conditions of non-equilibrium. The outcomes of this study closely mirror real-world conditions and can be harnessed as a theoretical foundation for the design and deployment of pile-foundation heat exchangers within GSHP systems.
Publisher
IOP Publishing
