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Temperature of tunnel wall at z

Temperature of the inner tunnel wall at the point z in the cable route in the tunnel.

Symbol
$\theta_{t,z}$
Unit
°C
Formulae
$\theta_{at,z}+T_a W_{a,z}-T_t \left(N_{sys} N_c W_{tot}-W_{a,z}\right)$
Related
$N_c$
Number of sources in system
$N_{sys}$
Number of parallel systems in the same confinement
$T_a$
Star thermal resistance of air [K.m/W]
$T_t$
Star thermal resistance of tunnel [K.m/W]
$\theta_{at,z}$
Air temperature in tunnel at z [°C]
$W_{a,z}$
Heat removed by air at z [W/m]
$W_{tot}$
Total losses per object [W/m]
Used in
$\theta_{to,z}$
Temperature of outer tunnel wall at z [°C]