4F50.12-Thermoelectric Fan (Peltier)

Video: Watch this demo

Instructor’s video

Description: This demo shows how a Peltier device uses a temperature differential to produce an electric potential.

Equipment:

• Pasco Thermoelectric Fan
• Two small Pyrex beakers
• Hot water
• LN2
• Small Thermos
• Safety gloves

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
Use caution when working with liquid nitrogen, as it is very cold.
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