Review Article
Influence of Ground Temperature on Shotcrete-to-Rock Adhesion in Tunnels
Table 9
Comparison of refrigerant consumption kg/(m·h) [
78].
| | Refrigerant | Geothermal (°C) | No heat insulation | 10 cm styrene | 10 cm polyurethane | 5 cm styrene | 5 cm polyurethane |
| | Ice | 100 | 34.84 | 19.80 | 15.52 | 25.34 | 21.38 | | Ice | 60 | 15.36 | 8.71 | 6.97 | 11.09 | 9.50 | | Liquid nitrogen | 100 | 5.09 | 2.89 | 2.27 | 3.70 | 3.12 | | Liquid nitrogen | 60 | 2.24 | 1.27 | 1.02 | 1.62 | 1.39 |
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