1x100 m BHE was installed to the Local Government of Szeged and we carried the Thermal Response Test out in 2011. The pipe was double U with 32 mm diameter.
At first we measured the undisturbed in situ temperature in the BHE after drilling and after that the TRT was carried out. The inlet, outlet temperature, mass flow and air temperature were recorded. The result of evaluation was the thermal conductivity value.