Thermoelectric coolers are solid state devices
without moving parts, fluids, or gases. Thermoelectric coolers do
not use any refrigerant or chemicals. Thus thermoelectric coolers
have several advantages over the conventional cooling systems.
Thermoelectric devices use the peltier effect to create a heat flux
between the junctions of two different types of materials. The
thermoelectric module can work as a cooler or heater depending
on the direction of DC current applied to the circuit