Temperature of duct inner wall

With crossing heat sources, a temperature rise of $\Delta\theta_{0x}$ applies at the hottest point.

Symbol
$\theta_{di}$
Unit
°C
Formulae
$\theta_e-T_{4i} n_{cc} \left(W_I+W_d\right)$Cables in duct
$\theta_e-T_{4i} W_{hs}$Heat sources in duct
$\theta_{de}+T_{4ii} n_{cc} W_{di}$Cables in riser (ERA)
$\theta_{de}+T_{4ii} n_{cc} W_{tot}$PAC/GIL with duct
$\theta_e-T_{4i} W_{sum}$Air-filled pipe with ducts