Diameter conductor (outer)

Symbol

$D_c$

Unit

m

Used in

$A_c$

Cross-sectional area conductor [mm$^2$]

$A_{comp}$

Cross-sectional area compartment [m$^2$]

$C_b$

Capacitance insulation [F/m]

$D_{ci}$

Diameter conductor (inner) [m]

$F_{form}$

$\gamma_c$

Skin and proximity effect factor $\gamma$ PAC/GIL conductor

$\mathrm{Gr}_c$

Grashof number conductor→gas

$h_{conv,c}$

Heat transfer coefficient convection conductor—gas [W/(K.m$^2$)]

$K_{ce}$

Radiation shape factor conductor—enclosure

$k_s$

Skin effect coefficient

$\mathrm{Nu}_c$

Nusselt number conductor—gas

$r_c$

Radius conductor [mm]

$t_{comp}$

Thickness compartment [m]

$T_{conv,ce}$

Thermal resistance convection conductor—enclosure [K.m/W]

$\theta_{gas}$

Gas temperature [°C]

$V_{comp}$

Gas volume [m$^3$]

$W_{conv,ce}$

Convective heat transfer conductor→enclosure [W/m]

$W_{rad,ce}$

Radiation heat transfer conductor→enclosure [W/m]