Editing Computer cooling (section)

===Piezoelectric pump===
A "dual piezo cooling jet", patented by [[General Electric|GE]], uses vibrations to pump air through the device. The initial device is three millimetres thick and consists of two [[nickel]] discs that are connected on either side to a sliver of piezoelectric ceramics. An alternating current passed through the ceramic component causes it to expand and contract at up to 150 times per second so that the nickel discs act like a bellows. Contracted, the edges of the discs are pushed apart and suck in hot air. Expanding brings the nickel discs together, expelling the air at high velocity.

The device has no bearings and does not require a motor. It is thinner and consumes less energy than typical fans. The jet can move the same amount of air as a cooling fan twice its size while consuming half as much electricity and at lower cost.<ref>{{cite web|url=http://www.gizmag.com/ge-dual-piezo-cooling-jet/25447/|title=GE's "dual piezo cooling jet" could enable even cooler gadgets|website=gizmag.com|date=14 December 2012|access-date=20 April 2013|archive-url=https://web.archive.org/web/20130721040030/http://www.gizmag.com/ge-dual-piezo-cooling-jet/25447/|archive-date=21 July 2013|url-status=live}}</ref>