# 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
$^{\circ}$C
Formulae
$T_{a} W_{a_{z}} - T_{t} \left(N_{c} N_{sys} W_{tot} - W_{a_{z}}\right) + \theta_{at_{z}}$
$T_{a}$
$T_{t}$
$\theta_{at_{z}}$
$W_{a_{z}}$
$W_{tot}$
Used in
$\theta_{to_{z}}$