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Thermoelectric effects
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Seebeck, Peltier and Thomson effects convert heat and electricity.
Seebeck: a temperature difference across two metals generates voltage (thermocouples). Peltier: current moves heat (cooling). Thomson: heating along a wire with a gradient.
K-type thermocouple gives 41 μV/K.
Reversible effects, unlike Joule heating.
In more detail
Thermoelectric effects convert temperature differences into voltage, or vice versa. The Seebeck effect produces voltage from a temperature gradient, and the Peltier effect produces heating or cooling from current.
Real-world uses
- Thermocouples measure temperature using the Seebeck effect.
- Peltier coolers are used in small refrigerators and camera sensors.
- Thermocouples use the Seebeck effect to measure temperature, and Peltier coolers use current to move heat.
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Frequently asked questions
What is a thermocouple?
Two dissimilar metals joined at points at different temperatures, producing a voltage.
Can thermoelectric devices generate power?
Yes, they can power sensors and spacecraft from waste heat.
What is a thermocouple?
Two dissimilar metals joined together, which generate a voltage that depends on the temperature difference between the junctions.
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