What is a TEG Module?

A TEG module stands for Thermo-electric Generator and is also called a Seebeck Generator. This is a device that is capable of converting heat energy into electric energy. They are used in a wide range of applications from detecting heat levels in ovens and stoves to production of electricity on the space shuttle. OriginThe TEG module is based on the Seebeck effect. This is a scientific principle that was discovered by Thomas Seebeck who noticed that an electric current was produced by a closed loop junction made of two metals when heat was applied across the junctions. This is because the heat causes electrons to move from the hot to the cold material. The first of these devices were made using bimetallic junctions but these proved to be too bulky and were, therefore, replaced by a semiconductor material that is made of Bismuth Telluride.


There are two main application modes for TEG modules. First, they can be used to produce electric energy from heat as Thermal image of a heat-powered Ecofan 812 Airmaxdiscovered by Seebeck. Second, another scientist called Peltier discovered that the reverse of the above principle held true. This has made it possible to create TEG modules that can be used to produce heat or cold. There is no functional difference between modules used for either the first or second application but rather their mode of usage and construction of their respective electric circuits is what differs. Uses of TEG modulesTEG modules are used where size and reliability are a factor. For example, they are used to provide energy for space modules such as the Mars Rover because they are reliable and will not need maintenance services, which would be unavailable. Here are some of the other uses of these devices.