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Geothermal Energy

Science – Society – Technology

Fig. 10 | Geothermal Energy

Fig. 10

From: Impact of operational temperature changes and freeze–thaw cycles on the hydraulic conductivity of borehole heat exchangers

Fig. 10

Measuring results of FTC3 out of FTC6 of the pilot-scale experiment. Upper plot: temperature measurements in southern orientation. Middle plot: temperature measurements in northern orientation Lower plot: hydraulic conductivity of BHE in blue (KBHE), soil conductivity in black (KSOIL) and the whole BHE system in red (KSYS). The results are displayed in dependence of the soil freezing phase and the thawing phase

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