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

Figure 8

Influence of the insulation layer on the surrounding rock temperature variation trend at different locations.

(a) TS1

(b) Peak temperature at TS1

(c) TS4

(d) Peak temperature at TS4

(e) TS6

(f) Peak temperature at TS6

(g) TS7

(h) Peak temperature at TS7