![]() Since piezoelectric fans must vibrate, they must use a pulsating or alternating current (AC) power source. The magnitude of this motion is very tiny, so to amplify it, a flexible shim or cantilever, such as a sheet of Mylar, is attached and tuned to resonate at the electrical input frequency. When electric power, such as AC voltage at 60 Hz is applied, it causes the PZT to flex back and forth, also at 60 Hz. ![]() Such a device is known as a piezoelectric transducer (PZT), which is the prime mover of a piezoelectric fan. There are certain substances, both naturally occurring and man-made, which will produce an electric charge from a change in dimension and vice-versa. Piezoelectric, as derived from Greek root words, means pressure and electricity. So far, so like the high-tech wizardry known as a 'fan' - but DCJ coolers are half the thickness and use half the energy while operating in almost complete silence. The new cooling technology developed by General Electric based on electric cooling elements originally developed for use in jet engines promises to provide extremely compact, efficient cooling for future electronic devices.ĭubbed Dual Piezoelectric Cooling Jets, or DCJ, the system works as a system of of bellows providing high-velocity jets of air to cool components down far more efficiently than just convection alone. What has most recently grabbed the attention of all is a new technology based ventilating system developed by GE Global Research. Still, these devices also tend to heat up during use.įor years, there have been scads of applications and gizmos based on piezoelectric materials. This also means that fans are unlikely to be found in the latest in mobile computing solutions, Smartphones and tablet computers. Laptops have enough room for a fan to extract heat from the CPU and memory modules, but sometimes these can become noisy.Īdditionally, fans take up a lot of space, which means that the thickness of a laptop can be limited. As electronics get smaller, faster, and more powerful, the devices we count on in our everyday connected lives tend to get hotter, requiring some kind of cooling device.
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