Cableizer

Thermal resistivity wall material

For cables in tunnels, this is the thermal resistivity of the tunnel wall, typically made of concrete.
For cables in troughs, this is the thermal resistivity of the trough wall and cover, made of concrete or polymere.
For cables in trays, this is the thermal resistivity of the tray wall and cover, made of metal or polymere.

Symbol
$\rho_{t}$
Unit
K.m/W
Related
$M_{tray}$
Tray material
Used in
$H_{tc}$
Parameter Hc trough cover
$T_{cond,CS}$
Thermal resistance conduction cable pack—sides [K.m/W]
$T_{cond,CT}$
Thermal resistance conduction cable pack—top/bottom [K.m/W]
$T_{cond,SA}$
Thermal resistance conduction cable pack—sides [K.m/W]
$T_{cond,TBA}$
Thermal resistance conduction cable pack—top/bottom [K.m/W]
$T_{tr}$
Thermal resistance trough [K.m/W]
$T_{tray}$
Thermal resistance conduction tray—air [K.m/W]
$T_{tw}$
Thermal resistance wall [K.m/W]
Choices
MaterialValueRange
PE3.52.5 - 4.0
PP4.53.5 - 5.0
PVC6.04.5 - 7.0
Metal0.0170.015 - 0.030
Alu0.00420.004 - 0.005
StN0.020.018 - 0.022
StW0.020.018 - 0.025
Fibre4.84.0 - 5.5
Cem2.01.0 - 2.5