Electricity and Magnetism

4F50.12: Thermoelectric Fan (Peltier)



Description: By keeping the plates of a peltier at different temperatures, a current is produced to run the fan.

Equipment: Demonstration Procedure:
  1. Fill one beaker up with hot water.
  2. Fill the other beaker up with Liquid Nitrogen (LN2).
  3. Bring the beakers next to each other, and place the fan in each (see second picture).
  4. Wait for conduction through the metals to occur.
  5. When the temperature difference between each peltier plate is great enough, current is produced.
  6. Flick the fan a little to get it to start spinning.
Liquid Nitrogen Liquid Nitrogen
Use caution when working with liquid nitrogen, as it is very cold.

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