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Table 3 Values of thermal properties for the selected rock types
From: Optimization of the utilization of deep borehole heat exchangers
Rock type | Minimum thermal conductivity value (W m−1 K−1) | Average thermal conductivity value (W m−1 K−1) | Maximum thermal conductivity value (W m−1 K−1) | Volumetric heat capacity (J m−3 K−1) |
|---|---|---|---|---|
Sandstone | 2.06 | 3.895 | 5.73 | 2.05 × 106 |
Limestone | 1.2 | 2.15 | 3.1 | 2.155 × 106 |
Granite | 2.12 | 2.87 | 3.62 | 2.33 × 106 |