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Fig. 4 | Geothermal Energy

Fig. 4

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

Fig. 4

Completion of the experimental BHE. (1) Steel vessel covered with latex sleeve and centered tube; (2) vessel inside view with latex and center tube in place, installation of the temperature sensors; (3) after withdrawal of the center tube the compacted soil sample stays in place; (4) closure of the vessel after installation of the top drainage layer. The detachment of the paths to monitor and operate the flow is indicated with arrow A

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