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Thanks to thermal conductivity maps, obtained from Optical Scanning method, and porosity maps, inferred from thermal conductivity maps, we have studied petrophysical heterogeneities commonly present in a granitic and sandstone geothermal reservoir (fault zone and permeable layers, respectively). The maps allowed determination of thermal conductivity and porosity variation to millimeter resolution,...
This paper presents a new method called the Crossed Contour Method for determining the effective properties (borehole radius and ground thermal conductivity) of a vertical ground-coupled heat exchanger. The borehole radius is used as a proxy for the overall borehole thermal resistance. The method has been applied to both simulated and experimental borehole Thermal Response Test (TRT) data using the...
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