Space Travel and Exploration
Electromagnetic Radiation

How do thermocouples generate electrical energy?

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Wiki User
2012-09-12 05:32:29

A thermocouple produces a tiny voltage proportional to the

temperature difference between two junctions where dissimilar

metals meet.


Thermocouples use rare-earth metals (chromium, aluminum, nickel,

etc), usually in pairs. As these metals heat up, they react with

one another and one metal sheds off an electron, which is then seen

as electricity. Thermocouples usually produce a very small amount

of electricity, often only enough to operate electric 'gates'.

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