Heat Transfer Simulation and Temperature Rapid Prediction for Trench Laying Cable

Table 2

Typical physical parameters for trench laying cable [22].

	Material	Thermal conductivity (W/(m·K))	Electronic conductivity (S/m)	Relative dielectric constant
Cable core	Copper	377	5.998 × 10^7	1.0
Insulation layer	XLPE	0.285	1 × 10^−15	2.5
Sheath layer	Aluminium	238	3.774 × 10^7	1.0
External layer	Polyethylene	0.132	1 × 10^−15	2.5
Concrete trench	Concrete	1.73	1 × 10^−15	1.0
Soil layer	Soil	1	1 × 10^−15	1.0