1 x 150 m BHE was installed in Budapest VII. district in 2011 and we carried the Thermal Response Test out. The pipe was single U with 40mm 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 and additionally the BHE field was sized.