The phenomenon in which electrical energy produced by means of thermal energy is called thermoelectric effect. This note provides us an information on see beck's effect thermocouples and variation of thermo-emf with temperature.
When an electric current is passed through a thermocouple, heat is either absorbed or released at the junctions, depending on the direction of current flow. This effect is called Peltier effect. This note provides us an information on Peltier effect and Thomson.