Cableizer
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Reference length of the tunnel

Symbol
$L_0$
Unit
m
Formulas
$\left(T_a+T_t+T_e\right) C_{av}$
Related
$C_{av}$
Heat capacity of the air flow [W/K]
$T_a$
Star thermal resistance air [K.m/W]
$T_e$
External thermal resistance of tunnel [K.m/W]
$T_t$
Star thermal resistance tunnel [K.m/W]
Used in
$\Delta \theta_{0t}$
Air temperature increase [K]
$T_{4t}$
Equivalent thermal resistance for tunnel [K.m/W]
$\theta_{at,L}$
Air temperature at outlet [°C]
$\theta_{at,z}$
Air temperature z [°C]