Numerical Study of Electromagnetic Loss and Heat Transfer in an Oil-Immersed Transformer

Table 1

Typical physical properties for different components in the transformer [20].

Component	Material	Thermal conductivity (W/(m·K))	Heat capacity (J/(kg·K)	Electronic conductivity (S/m)	Relative permeability
Coil	Copper	λcopper (T)	cp, copper (T)	6 × 10^7	1
Core	Soft iron	λiron (T)	cp, iron (T)	0.1	μr
Metal component	Iron	λiron (T)	cp, iron (T)	1.12 × 10^7	50
Oil tank	Steel	76.2	440	1.12 × 10^7	600