Engineering:Windbelt
The Windbelt is a wind power harvesting device invented by Shawn Frayne in 2004 for converting wind power to electricity.[1][2] It consists of a flexible polymer ribbon stretched between supports transverse to the wind direction, with magnets glued to it. When the wind blows across it, the ribbon vibrates due to vortex shedding, similar to the action of an aeolian harp. The vibrating movement of the magnets induces current in nearby pickup coils by electromagnetic induction.
One prototype has powered two LEDs, a radio, and a clock (separately) using wind generated from a household fan.[3] The cost of the materials was well under US$10.Cite error: Closing </ref> missing for <ref> tag
The Windbelt's inventor, Shawn Frayne, was a winner of the 2007 Breakthrough Award from the publishers of the magazine, Popular Mechanics.[8] He is trying to make the Windbelt cheaper.[9]
The inventor's claims that the device is 10–30 times more efficient than small wind turbines have been refuted by tests.[2] The microWindbelt could generate 0.2 mW at a wind speed of 3.5 m/s and 5 mW at 7.5 m/s, which represent efficiencies (ηCp) of 0.21 and 0.53 respectively. Wind turbines typically have efficiencies of 1% to 10%. Since the Windbelt a number of other "flutter" wind harvester devices have been designed, but like the Windbelt almost all have efficiencies below turbine machines.[2]
Footnotes
- ↑ PR Newswire Association. "New International Design Award for Humanitarian Innovation Announces Five Finalists." PR Newswire 3 Sept. 2009: n. pag. General OneFile. Web. 13 October 2009
- ↑ 2.0 2.1 2.2 Briand, Danick; Yeatman, Eric; Roundy, Shad (2015). Micro Energy Harvesting. John Wiley & Sons. pp. 315–316. ISBN 978-3527672936.
- ↑ UpBeatnik (2008-02-09), Windbelt electrical wind powered generator demo, https://www.youtube.com/watch?v=AMojRXK14jU, retrieved 2016-12-21
- ↑ "Humdinger Windbelt Achieves a New Milestone". PCMAG. http://www.goodcleantech.com/2008/11/humdinger_windbelt_achieves_a.php.
- ↑ "Shawn Frayne Founds Humdinger Enterprises to Develop Windbelt". PCMAG. http://www.goodcleantech.com/2007/10/shawn_frayne_founds_humdinger.php.
- ↑ "Inventor Shawn Frayne Creates Cheap, Efficient Wind Power". PCMAG. http://www.goodcleantech.com/2007/10/inventor_shawn_frayne_creates.php.
- ↑ http://www.popularmechanics.com/technology/industry/4224763.html?series=37an
- ↑ "Windbelt - Third World Power - Wind Generator - Video - Breakthrough Awards - Popular Mechanics". http://www.popularmechanics.com/technology/industry/4224763.html.
- ↑ Reed Business Information. "Technology." Electronics Weekly 16 January 2008: n. pag. General OneFile. Web. 9 October 2009.
References
- Instructions for building a proof-of-concept windbelt-powered lamp with parts recovered from an old hard drive
- Windbelt cheap micro wind generator REUK.co.uk 17 October 2007
- Windbelt - reinventing wind power physics.org 22 April 2010
External links
- Humdinger Wind, company founded by the inventor, and holder of the patents.
- Energy Harvesting Journal, 30 Mar 2010 Wind energy harvester from Humdinger
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