The Guardian reports that Vortex Bladeless has developed a new bladeless wind turbine that promises to be more efficient, less visually intrusive, and safer for birdlife than conventional turbines. Using the principle of natural frequency and vorticity, the turbine oscillates in swirling air caused by the wind bypassing the mast, and then builds exponentially as it reaches the structure's natural resonance. It's a powerful effect that famously caused the collapse of the Tacoma Narrows Bridge in 1940, footage of which inspired David Yáñez to try to build a structure to harness this energy rather than prevent it. The turbine "floats" on magnets, which as well as significantly amplifying the oscillation, also eliminates any friction and the need for expensive lubricating oils or mechanical parts. "Wind turbines now are too noisy for people's backyard," says David Suriol. "We want to bring wind power generation to people's houses like solar power."
On the minus side the oscillating turbine design will sweep a smaller area and have a lower conversion efficiency. "The best wind turbine will collect around 50% of energy from the wind," says Suriol. "We are close to 40% with bladeless turbines in our wind tunnel laboratory." To offset this disadvantage, "you can put four, five or six 4kW turbines in the space of one conventional turbine, which need 5 meter diameter space around them," he says. In fact, wind tunnel tests have shown they perform even better placed closer together as they benefit from the vortices each of them creates.
(Score: 5, Insightful) by Dunbal on Wednesday June 03 2015, @01:14PM
God knows how many birds are killed by cars, glass windows and doors, buildings and just general deforestation and pollution, BUT GOD FORBID a windmill kills a bird!
(Score: 2, Insightful) by acp_sn on Wednesday June 03 2015, @01:16PM
WINDMILLS DO NOT WORK THAT WAY!
(Score: 2) by wonkey_monkey on Wednesday June 03 2015, @02:05PM
GOODNIGHT!
systemd is Roko's Basilisk
(Score: 2) by maxwell demon on Thursday June 04 2015, @06:15AM
Do you live close to a windmill that you have to beat in volume, or why are you shouting?
The Tao of math: The numbers you can count are not the real numbers.
(Score: 2, Funny) by Anonymous Coward on Wednesday June 03 2015, @02:02PM
I'd be a lot happier if they killed outdoor cats.
(Score: 1, Funny) by Anonymous Coward on Wednesday June 03 2015, @04:29PM
iomn a indror csat yuo insednserrtivcew xcodf
(Score: 0) by Anonymous Coward on Wednesday June 03 2015, @05:12PM
Ideally that is the sound the cat would make as it was being destroyed by the turbine.
(Score: 3, Interesting) by Freeman on Wednesday June 03 2015, @05:07PM
I love animals of all types. A cat eating a bird / rat / mouse is natural. There is a good bit of controversy as to whether feral cats are good for the ecosystem. It doesn't help that the Smithsonian has spent a good bit of time spinning out negative stories that aren't based on good science. http://www.smithsonianmag.com/science-nature/feral-cats-kill-billions-of-small-critters-each-year-7814590/?no-ist [smithsonianmag.com] Apparently some people go crazy. http://opinion.latimes.com/opinionla/2011/11/a-dc-bird-researcher-is-convicted-of-trying-to-poison-cats.html [latimes.com] And you thought that the neighborhood cat lady was bad. I'd be much more worried about a person who is poisoning animals.
Joshua 1:9 "Be strong and of a good courage; be not afraid, neither be thou dismayed: for the Lord thy God is with thee"
(Score: 0) by Anonymous Coward on Wednesday June 03 2015, @05:37PM
A human poisoning animals is natural, since humans are animals and part of nature.
(Score: 2) by Freeman on Thursday June 04 2015, @12:22AM
By your reasoning any act could be considered natural and part of nature. Poisoning animals isn't a typical human trait. Eating animals and deforesting could be construed as typical human activities. Though eating plants and planting trees could also be construed as typical human activities as well. The main difference is that Humans actually have the ability to improve the world around them even though it may not be in their nature. So, poisoning animals isn't a natural human activity. Unless you count Native Americans or other People who used poison to hunt.
Joshua 1:9 "Be strong and of a good courage; be not afraid, neither be thou dismayed: for the Lord thy God is with thee"
(Score: 2, Informative) by Anonymous Coward on Wednesday June 03 2015, @02:21PM
A very informative web page about that topic. [10000birds.com]
(Score: 2) by Phoenix666 on Wednesday June 03 2015, @03:55PM
Killing birds is only OK if you're doing it for fun.
Washington DC delenda est.
(Score: 2) by efitton on Thursday June 04 2015, @12:41AM
https://www.youtube.com/watch?v=yhuMLpdnOjY [youtube.com]
Tom Lehrer - Poisoning Pigeons In The Park
(Score: 2) by Joe Desertrat on Wednesday June 03 2015, @05:29PM
Windmills tend to be placed at funnel points for winds, which also tend to be funnel points for migrating birds.