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Table 4 Simulated scenarios for the sensitivity analysis
From: Optimization of the utilization of deep borehole heat exchangers
Scenario ID | Outer pipe diameter (m) | Inner pipe diameter (m) | Flow rate (L s−1) | Outer pipe wall thermal conductivity (W m−1 K−1) | Grout thermal conductivity (W m−1 K−1) | DBHE depth (m) | Rock type | Description |
|---|---|---|---|---|---|---|---|---|
#1A-C | Var | 0.09 | 11.6 | 0.5 | 0.73 | 2000 | Sandstone | #1A, #1D, #1G correspond to the minimum thermal conductivity value |
#1D-F | Var | 0.09 | 11.6 | 0.5 | 0.73 | 2000 | Limestone | #1B, #1E, #1H correspond to the average thermal conductivity value |
#1G-I | Var | 0.09 | 11.6 | 0.5 | 0.73 | 2000 | Granite | #1C, #1F, #1I correspond to the maximum thermal conductivity value |
#2A-C | 0.177 | Var | 11.6 | 0.5 | 0.73 | 2000 | Sandstone | #2A, #2D, #2G correspond to the minimum thermal conductivity value |
#2D-F | 0.177 | Var | 11.6 | 0.5 | 0.73 | 2000 | Limestone | #2B, #2E, #2H correspond to the average thermal conductivity value |
#2G-I | 0.177 | Var | 11.6 | 0.5 | 0.73 | 2000 | Granite | #2C, #2F, #2I correspond to the maximum thermal conductivity value |
#3A-C | 0.177 | 0.09 | Var | 0.5 | 0.73 | 2000 | Sandstone | #3A, #3D, #3G correspond to the minimum thermal conductivity value |
#3D-F | 0.177 | 0.09 | Var | 0.5 | 0.73 | 2000 | Limestone | #3B, #3E, #3H correspond to the average thermal conductivity value |
#3G-I | 0.177 | 0.09 | Var | 0.5 | 0.73 | 2000 | Granite | #3C, #3F, #3I correspond to the maximum thermal conductivity value |
#4A-C | 0.177 | 0.09 | 11.6 | Var | 0.73 | 2000 | Sandstone | #4A, #4D, #4G correspond to the minimum thermal conductivity value |
#4D-F | 0.177 | 0.09 | 11.6 | Var | 0.73 | 2000 | Limestone | #4B, #4E, #4H correspond to the average thermal conductivity value |
#4G-I | 0.177 | 0.09 | 11.6 | Var | 0.73 | 2000 | Granite | #4C, #4F, #4I correspond to the maximum thermal conductivity value |
#5A-C | 0.177 | 0.09 | 11.6 | 0.5 | Var | 2000 | Sandstone | #5A, #5D, #5G correspond to the minimum thermal conductivity value |
#5D-F | 0.177 | 0.09 | 11.6 | 0.5 | Var | 2000 | Limestone | #5B, #5E, #5H correspond to the average thermal conductivity value |
#5G-I | 0.177 | 0.09 | 11.6 | 0.5 | Var | 2000 | Granite | #5C, #5F, #5I correspond to the maximum thermal conductivity value |
#6A-C | 0.177 | 0.09 | 11.6 | 0.5 | 0.73 | var | Sandstone | #6A, #6D, #6G correspond to the minimum thermal conductivity value |
#6D-F | 0.177 | 0.09 | 11.6 | 0.5 | 0.73 | var | Limestone | #6B, #6E, #6H correspond to the average thermal conductivity value |
#6G-I | 0.177 | 0.09 | 11.6 | 0.5 | 0.73 | var | Granite | #6C, #6F, #6I correspond to the maximum thermal conductivity value |