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Convective heat transfer, surface→air

Convection heat transfer from outer surface of PAC/GIL to surrounding air.

Symbol
$W_{conv,sa}$
Unit
W/m
Formulas
$h_{conv,sa} \pi D_{o} \left(\theta_{e}-\theta_{film}\right)$
Related
$D_{o}$
Outer diameter [m]
$h_{conv,sa}$
Heat transfer coefficient convection surface—air [W/(K.m$^2$)]
$\pi$
Archimedes' constant $\pi$
$\theta_{e}$
External temperature object [°C]
$\theta_{film}$
Film temperature [°C]
Used in
$T_{4iii}$
Thermal resistance ambient [K.m/W]
$T_{conv,sa}$
Thermal resistance convection surface—air [K.m/W]