Figure 1-2.
Seebeck effect
5. The operation is reversible, in the same sense that, if an electric current is
forced through the circuit by a battery, heat will be absorbed at the cold junction
and rejected at the hot junction. Under these conditions, the device functions as
a refrigerator or heat pump. This phenomenon is known as the Peltier effect (fig
1-3).
Figure 1-3.
Peltier effect in a copper-iron junction
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