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Fig. 8 | Geothermal Energy

Fig. 8

From: First field application of temperature sensor modules for groundwater flow detection near borehole heat exchanger

Fig. 8

Measured and simulated TSM temperatures at 94 m depth. The left and right columns show the inner and outer ring temperatures, respectively. They are shown both as a standard plot (ad) and as a polar plot (e, f). a and b show the temperatures before BHE operation, c and d the steady-state temperatures during BHE operation. Black squares represent the measured data; solid and dashed black lines represent the simulated temperatures with and without groundwater flow, respectively. The red square marks the position of the first sensor

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