Air temperature in tunnel at z

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

Symbol
$\theta_{at_{z}}$
Unit
$^{\circ}$C
Formulae
$\theta_{at_{0}} + \left(1 - e^{- \frac{z}{L_{0}}}\right) \left(N_{c} N_{sys} W_{tot} \left(T_{e} + T_{t}\right) + \theta_{a} - \theta_{at_{0}}\right)$
$\theta_{a}$
Ambient temperature [$^{\circ}$C]
$\theta_{at_{0}}$
Used in
$\theta_{o_{z}}$
$\theta_{t_{z}}$
$W_{a_{z}}$