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Radiation shape factor, conductor to enclosure

Radiation shape factor for concentric cylindrical annuli (conductor to enclosure) such as a PAC/GIL.

Symbol
$K_{ce}$
Formulae
$\frac{1}{\frac{1}{\epsilon_c}+\frac{n_c D_c}{D_{comp}} \left(\frac{1}{\epsilon_{encl}}-1\right)}$
Related
$D_c$
External diameter of conductor [m]
$D_{comp}$
Diameter of compartment [m]
$\epsilon_c$
Effective emissivity of conductor
$\epsilon_{encl}$
Effective emissivity of enclosure
$n_c$
Number of conductors in object
Used in
$h_{rad,ce}$
Radiation heat transfer coefficient, conductor to enclosure [W/(K.m$^2$)]
$W_{rad,ce}$
Radiation heat transfer, conductor to enclosure [W/m]