Why the heat powered stove fan can run without electric?

Heat powered stove fan is Eco-friendly product,it can run without electric,The secret is the TEG(thermoelectric genorator),a device that can convert heat into electricity,the core of the heat powered stove fan.

Seeback effect

How TEG work? First we must know about the thermoelectric effect,it includ three base effects,Seeback effect,Peltrie effect and Thomsom effect.And the thermoelectric genorator is base on the Seeback effect.

The Seebeck effect is named after the Baltic German physicist Thomas Johann Seebeck.It is the conversion of temperature differences directly into electricity.In 1821,Seebeck discovered that a compass needle would be deflected by a closed loop formed by two different metals joined in two places, with a temperature difference between the junctions. This was because the metals responded to the temperature difference in different ways, creating a current loop and a magnetic field. Seebeck did not recognize there was an electric current involved, so he called the phenomenon the thermomagnetic effect. Danish physicist Hans Christian Ørsted rectified the mistake and coined the term “thermoelectricity”.

TEG/TEC/Peltier element

Thermoelectric generators are devices which are used Seebeck effect to generate electrical energy.When two dissimilar semiconductors (p-type and n-type) at the same temperature are connected together they establish a static electric potential difference.

With the introduction of a temperature difference, heat flows across the joined semiconductors which in turn permits electrons to flow. With the electron flow or current comes the ability to power electrical devices such as heat powered stove fan motors.

 

Some videos

1.A very good video to explain the thermoelectricity.

 

2.A very good video to show the TEG module.

 

3.DIY with the TEG module.