Cableizer ®

Heat removed by air z

Heat removed by the air in the tunnel at the point z in the cable route, which is equal to $C_{av}\frac{\partial{\theta_{at}(z)}}{\partial{z}}$.

Symbol
$W_{a,z}$
Unit
W/m
Formulas
$\frac{\left(T_{t}+T_{e}\right) N_{sys} N_{c} W_{tot}-\theta_{at,z}-\theta_{a}}{T_{a}+T_{t}+T_{e}}$
Related
$N_{c}$
Number of sources in system
$N_{sys}$
Number of parallel systems in the same confinement
$T_{a}$
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]
$\theta_{a}$
Ambient temperature [°C]
$\theta_{at,z}$
Air temperature z [°C]
$W_{tot}$
Total losses (object) [W/m]
Used in
$\theta_{o,z}$
Temperature object surface z [°C]
$\theta_{t,z}$
Temperature wall z [°C]