Numerical Study of Heat Transfer and Optimum Design for Trench Laying Cables with Ceramic Plates

Table 2

Typical physical parameters for the trench laying cable [17].

	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	Aluminum	160	3.774 × 10^7	1.0
External layer	Polyethylene	0.132	1 × 10^−15	2.5
Ceramic plate	Ceramic	30	1 × 10^−15	1.0
Concrete layer	Concrete	1.73	1 × 10^−15	1.0
Soil layer	Soil	1	1 × 10^−15	1.0