The Seebeck Effect
Our technology is based on the Seebeck Effect (sometimes referred to as the Thermoelectric Effect). This effect is the conversion of thermal differences to electrical voltage. The conversion in the opposite direction (voltage to temperature difference) is called Peltier Effect.
Detailed information about the Thermoelectric Effect is available in this excellent Wikipedia article: Thermoelectric Effect
Thermocouples are the building blocks of thermoelectric elements. A thermocouple consists of two dissimilar conductors (called thermopiles) that are in contact with each other. Within a thermoelectric element, many such thermocouples are connected in series to increase the voltage output. The image on the right displays a schematic drawing of thermocouples connected in series.
greenTEG uses a production technology which allows to industrially manufacture thermoelectric elements with a very high density of thermocouples. This production technology has been developed at the Swiss Federal Institute of Technology in Zurich (ETH Zurich).
The image on the left side shows greenTEG’s thermoelectric elements. The complete element is produced in a wet chemical process. The elements are highly customizable (size, shape, # of thermopiles, thermopile diameter). The main manufacturing steps are
- Drilling holes into the substrate
- Deposition of p-type thermopiles into one half of the holes
- Deposition of n-type thermopiles into the remain half of the holes
- Deposition of interconnects
- Packaging of the elements
These thermoelectric elements can be used for a large variety of applications. greenTEG currently focuses on 3 different applications. More information about each application, is available on their respective pages.
Heat Flux Sensing
Heat Flux Sensors can be used for developing new products, adding functionality to existing products and in research & development.
Heat Flux Sensing