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Yoga Korunta

Life & Politics

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Location: United States

One learns, as nothing endures but change.

22 June 2007

Friday Science Blogging: Peltier effect

(Elec.) The production or absorption of heat at the junction of two metals on the passage of a current. Heat generated by the passage of the current in one direction will be absorbed if the current is reversed.

the free dictionary

Readers, I checked science sources. It's so complicated that you don't want to know!

The Peltier effect is the reverse of the Seebeck effect; a creation of a heat difference from an electric voltage.
It occurs when a current is passed through two dissimilar metals or semiconductors (n-type and p-type) that are connected to each other at two junctions (Peltier junctions). The current drives a transfer of heat from one junction to the other: one junction cools off while the other heats up; as a result, the effect is often used for thermoelectric cooling. This effect was observed in 1834 by Jean Peltier, 13 years after Seebeck's initial discovery.

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