Cableizer
Log in

Heat generated by external object

Heat generated by external heat source / cable $h$.

Symbol
$W_h$
Unit
W/m
Formulas
$\mu n_{ph} \left({I_c}^2 R_c \left(1+\lambda_1+\lambda_2+\lambda_3+\lambda_4\right)+W_d\right)$cables
$W_{hs}$heat sources
Related
$I_c$
Conductor current [A]
$\lambda_1$
Loss factor shield (screen/sheath)
$\lambda_2$
Loss factor armour
$\lambda_3$
Loss factor steel pipe pipe-type cable
$\lambda_4$
Loss factor magnetic duct
$\mu$
Loss factor daily load variation [p.u.]
$n_{ph}$
Number of phases in a cable
$R_c$
Electrical resistance conductor [$\Omega$/m]
$W_d$
Dielectric losses (phase) [W/m]
$W_{hs}$
Heat dissipation heat source [W/m]
Used in
$\Delta \theta_{0x}$
Temperature rise by crossing heat sources [K]
$\Delta \theta_{0x,h}$
Temperature rise of the conductor by source h [K]
$\Delta \theta_{uh}$
Temperature rise by crossing heat sources z [K]