A Scale Model of Tension Structures in Road Tunnels to Optimize the Use of Solar Light for Energy Saving

Table 1

Correction factors used to convert mock-up values into Earth surface values.

Times of the day (June 21st) when measurements were taken)	Irradiance on the mock-up (W/m^2)	Irradiance on the Earth’s surface (W/m^2)	Correction factor
12:00	300	955.20	3.184
14:15	300	1045.20	3.484
16:00	300	992.24	3.307