Cableizer ®

Outer diameter duct

If the cable is not in a duct, $Do_d$ is equal to the cable outer diameter $D_e$.

Symbol
$Do_{d}$
Unit
mm
Formulas
$Di_{d}+2\left(t_{d}+t_{dp}\right)$
Related
$Di_{d}$
Inner diameter duct [mm]
$t_{d}$
Thickness duct [mm]
$t_{dp}$
Thickness protective cover [mm]
Used in
$A_{d}$
Cross-sectional area duct wall [mm$^2$]
$D_{do}$
Outer diameter duct [m]
$D_{o}$
Outer diameter [m]
$h_{lg}$
Ratio of heat dissipation coefficients
$J_{d}$
Moment of inertia (bending) duct [mm$^4$]
$p_{d}$
Apportioning factor duct
$T_{4d}$
Thermal resistance daily load cycle [K.m/W]
$T_{4ii}$
Thermal resistance duct wall [K.m/W]
$T_{4w}$
Thermal resistance weekly load cycle [K.m/W]
$T_{4y}$
Thermal resistance yearly load cycle [K.m/W]
$t_{d}$
Thickness duct [mm]