Thursday, November 13, 2014

New technique generates electricity from mechanical vibration

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Electrical power is usually generated through heat, movement, nuclear processing or chemical reactions, but scientists at VTT Technical Research Center of Finland, have developed a new method that involves mechanical vibrations.

According to Gizmag, they realized how to store the energy of vibration that occurs naturally when two surfaces with different job functions are linked by electrodes, being that this energy can be used to electrify low power electronic devices.

A work function is a property of the surface of a material that is defined as the difference between the energy of an electron at rest and the least thermodynamic work that is needed to remove the electron from the material.

Scientists at VTT created a parallel plate condenser with copper and aluminum wire, connected to an external circuit. The work functions of the boards allowed the initial load of a volt, as electrons have fled from one surface to the other.

Different electrode materials could, theoretically, produce higher voltages from 3V or 5V â€" above. The copper plate was fixed in place, while a motor vibrated the aluminum plate perpendicular to both plates, solid form or through impulses.

The energy work buffer function have a big advantage over the piezoelectric and electrostatic devices that generate electricity to mechanical vibrations to feed many sensors and medical implants.

According to Finnish researchers, who published this work in the Scientific Reports, the new technology should be implemented industrial scale between three to six years. Still, she will still have to be worked out and new versions emerge in the near future.

Foto: Nicholas Petrone/Creative Commons

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