Harvesting Energy from Changing Temperatures

Sep-18-14 Inspired by an ancient clock, researchers have created a device able to harvest energy through changes in air pressure and temperature.

The system is made up of a metal bellows filled with a gas that will expand and contract in response to the outside air temperature. Cantilever motion harvesting devices attached to the bellows move with it to convert the kinetic energy into electricity that can be used to power small devices and sensors. A temperature change of only 0.25C is enough to activate the bellows, which is well within the normal temperature fluctuations in an office building.

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[WASHINGTON.EDU]
[HOMES.CS. WASHINGTON.EDU]

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