Transfer modes
Heat dissipation in electronic systems

The temperature of the electronic or electrical component is determined by :

with ΔT_conduction temperature difference required to conduct heat from the component to the cooling surfaces,

ΔT_transfer temperature difference required between the exchange surfaces and the environment to evacuate the heat flow coming from the component by conduction.

From this relationship, we can see that cooling problems in electricity and electronics boil down to heat conduction from the component to the exchange surfaces and heat transfer (convective and radiative) from the exchange surfaces to the environment.

There are three modes of heat transfer: conduction, radiation, and natural or forced...