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Table 1 Detailed information of the BHE system
Items | Units | Northern district | Southern district |
|---|---|---|---|
Number of BHE arrays | Â | 20 | 10 |
BHE type | Â | Single U-type | Single U-type |
Number of BHEs | Â | 7376 | 3121 |
Length of each BHE | m | 140 | 120 |
Building seasonally thermal demand (heating application) | MW·h | 69,393 | 34,550 |
Building seasonally thermal demand (cooling application) | MW·h | 43,344 | 21,294 |
Ground density | kg/m3 | 1514 | 1522 |
Ground heat capacity | J/kg·K | 1480 | 1440 |
Ground thermal conductivity | W/(m·K) | 1.62 | 1.62 |
Ground thermal diffusivity | m2/s | 1.0 × 10–5 | 1.0 × 10–5 |
Initial mean ground temperature | K | 288.75 | 288.75 |