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From: Temperature sensor module for groundwater flow detection around borehole heat exchangers
Units | Thermal conductivity [W m−1 K−1] | Volumetric heat capacity [MJ K−1 m−3] | Permeability [m2] | Porosity [–] | Temperature [°C] |
---|---|---|---|---|---|
Ground | 1.2–3.0 | 2.3 | 3 × 10−11 | 0.200–0.300 | 10.0 |
BHE cement | 2.0 | 1.0 | 1 × 10−19 | 0.010 | 10.0 |
Pipe | 0.3 | 4.0 | 1 × 10−20 | 0.001 | Calculated |