Cableizer
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Air temperature in tunnel at z

Air temperature in the tunnel at the point z in the cable route.

Symbol
$\theta_{at,z}$
Unit
°C
Formulae
$\theta_{init}+\left(\theta_a+\left(T_t+T_e\right) N_{sys} N_c W_{tot}-\theta_{init}\right) \left(1-e^{\frac{-z}{L_0}}\right)$
Related
$L_0$
Reference length of the tunnel [m]
$N_c$
Number of sources in system
$N_{sys}$
Number of parallel systems in the same confinement
$T_e$
External thermal resistance of tunnel [K.m/W]
$T_t$
Star thermal resistance of tunnel [K.m/W]
$\theta_a$
Ambient temperature [°C]
$\theta_{init}$
Air temperature with no load [°C]
$W_{tot}$
Total losses per object [W/m]
Used in
$\theta_{o,z}$
Temperature of the surface of object at z [°C]
$\theta_{t,z}$
Temperature of tunnel wall at z [°C]
$W_{a,z}$
Heat removed by air at z [W/m]