Investigation of the Thermal Performance of Energy Tunnel Equipped with the Insulation Layer Considering Ventilation and Groundwater Seepage

Figure 7

Influence of the insulation layer on the interface temperature variation between lining and surrounding rock at different locations.

(a) TS2

(b) Peak temperature at TS2

(c) TS3

(d) Peak temperature at TS3

(e) TS5

(f) Peak temperature at TS5