Estimating Thermal Conductivities of Layered Soils Using Conventional Thermal Response Tests
Estimating Thermal Conductivities of Layered Soils Using Conventional Thermal Response Tests
This study presents a new method for processing Thermal Response Test (TRT) data to estimate the thermal properties of layered ground. Our approach couples heat transfer processes inside and outside the heat exchanger (HEX), offering a more comprehensive analysis than traditional data processing methods. We use heat transfer inside the HEX to estimate the distribution of the fluid temperature along its length, while simultaneously employing heat transfer outside the HEX to determine the thermal resistance. This coupled approach facilitates a precise estimation of the thermal conductivity of individual soil layers. Starting with a conventional TRT, we apply an iterative process that approximates the fluid temperature. By matching the inlet and outlet fluid temperatures at layers interfaces, we determine the thermal properties of each distinct soil layer. This method significantly improves upon traditional TRT analysis, without the need for any additional instrumentation, accounting for the heterogeneous nature of the subsurface. Our approach shows promise for enhancing the design and efficiency of ground-coupled heat pump systems in layered soils.
Mohammad Al-Tawaha; S. Abdelaziz
4th Asia-Pacific Conference on Physical Modelling in Geotechnics (ACPMG2024)
Other
https://doi.org/10.53243/ACPMG2024-49
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