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Thermal interference process between two energy piles in 2D model using transparent soil

Author

Listed:
  • Zhou, Yang
  • Wang, Jinyun
  • Li, Chong
  • Kong, Gangqiang
  • Li, Renrong

Abstract

Energy piles have the potential to contribute to the use of shallow geothermal energy. The heat exchange efficiency of energy piles in groups decreases compared with that of a single energy pile. Understanding the thermal interference mechanism between piles and its impact on the temperature response of the soil is crucial. In this study, the evolution processes of the temperature field of transparent soil around one and two energy piles in a 2D model were obtained by establishing the relationship between pixel intensity and soil temperature. This relationship was verified using a single energy pile test under heating conditions. Thermal images of transparent soil under different thermal loads (heating or cooling) were studied to investigate the phenomenon of thermal interference between two piles. The temperature superposition effect becomes more evident closer to the center of the two piles. Analyzing the temperature distribution in the soil and introducing a thermal interference coefficient revealed that the thermal accumulation effect between piles is more significant under lower thermal loads.

Suggested Citation

  • Zhou, Yang & Wang, Jinyun & Li, Chong & Kong, Gangqiang & Li, Renrong, 2024. "Thermal interference process between two energy piles in 2D model using transparent soil," Energy, Elsevier, vol. 308(C).
    • Handle: RePEc:eee:energy:v:308:y:2024:i:c:s0360544224022163
    DOI: 10.1016/j.energy.2024.132442
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