Thermal Stabilization Time of Borehole Heat Exchanger Due to the Drilling Process

Abstract

The implementation of a borehole heat exchanger for a heat pump consists of the following stages: drilling the borehole, running the probe, filling the borehole, Thermal Response Test execution and drilling of subsequent borehole heat exchangers depends on power and energy required. In this paper the effect of time on the thermal stabilization time borehole heat exchanger after the drilling process is evaluated. It should be emphasized that this time can be comparised with the period after the Thermal Response Test of the borehole heat exchanger can be performed. An estimate of this time is necessary because only after this time can a reliable TRT be made. The research used newly drilled borehole heat exchangers at the AGH University of Science and Technology and the NIMO-T device used to test both the pressure and the temperature of the heat carrier filling the heat exchanger tubes.