Hello World’s Ashlee Vance paid a recent visit to Iceland’s capital city of Reykjavik to see the next part of the green energy story. He found a start-up called Icewind that is building a new type of funky wind turbine designed to perform well in low-wind conditions but also to slow itself down in high-winds, preventing it from catching on fire or ripping apart.
Watch the full episode of 'Hello World: Iceland': https://www.youtube.com/watch?v=n8ZRTJQAcjU
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Why don't they just make wind turbines have a system built in to resist high wind speeds? Like one of those old-timey centrifugal brake type things where if it starts going too fast, centrifugal force makes the arms spress out and slows it down. Don't know the proper way to describe it, but it's like the exact OPPOSITE of what happens when a ballerina spins and she pulls her arms in to spin faster. When the arms go out, spin slows down.
How efficient is a wind turbine design where half the turbine area is moving into the wind, counteracting the other half which is moving away from the wind? The only reason it works at all is because the back side of each blade is curved to slightly reduce its friction as it moves into the wind.
I'm not an engineer, but wouldn't having more fans decrease the energy needed to move the rotor out of deadlock? Or would the total energy needed stay the same? My intuition tells me that by decreasing the energy needed at any particular time, the rotor would still spin faster. For example the shape of a turbine vent seems much better for this kind of wind turbine.
Thanks Bloomberg, another gem from your media team. Why do Icelanders speak better English than New Yorkers, Floridians, and Londoners? It's damn embarrassing...these gentlemen definitely will get my money when I venture out to build out a property. It makes total sense to convert dollars into land and energy goods.
Like he said nothing new. I've produced one very similar myself and yes they do prevent over spin from high winds. When it reaches a certain RPM it creates a Vortex around it that blocks the wind in a way like a giant drum wood. The faster it spins the less likely it is able to spend because it becomes less aerodynamic efficient for rotation. At a certain point it literally just fights itself and becomes a cylinder. This is simply only my experience with these types of designs. To see this company grow would be excellent
Imagine anything not secured on a merry-go-round (tiovivo in Spanish). It will be flung outward. So while the one blade is catching the wind, it is causing air to move outward from above and below on the other 2 vanes. An area for improvement?
Millions were put into research of these turbines and they cannot produce more energy than the control eats up. The project was eventually put down, after years of financial and cognitive input. Contact me and I will direct you to the company, university and production chief, if you are interested.
Would the Savonius vertical axis wind turbine be viable if it were made of plastic? You could make the turbines must cheaper by plastic injection molding instead of having to make a metal turbine, I think. Plus you could use recycled plastic for the turbine, couldn't you? . I am no expert but I would think that a plastic rotor could be made strong enough. Is there something I am missing?
Leif Johnson the electric motor, gearing/ transmission control electronics and grid inverter/ battery storage are the expensive bits, your right about plastic being strong enough but sunlight can degrade plastic and its outside constantly in the elements so it's a trade off
old technology, but still a bad choice.. LENZ vawts are ultimately more effecient from the push/pull design of the actual airfoil.
mine is about the same size as that one but it puts out 1kwh of power ( MOUNTED A FOOT OF THE GROUND)
What if you made a cheaper electrostatic version of this wind power? Where the spinning of fans will cause it to mechanically rub the carpet or similar material to pvc pipe rapidly and generate large amounts of static electricity. You then convert this static electricity to AC or DC power. The taller the pvc pipe the better. Attaching pvc pipe on terrace of a tall building or top of a mountain even better. Covering pvc pipe with copper coil on the inside even more better.
"One of Wind Power's Biggest Problems I thought that this videos would be about the slaughter of birds. I moved to the Columbia Hills (which flank the Columbia River in Washington State) in 2000. In 2000, anytime one looked at the sky one saw hawks and eagles circling; when driving down a country road paralleling the Columbia Hills, it seemed as if there was a raptor perched on every telephone poll. Then they built the wind farms. Now all the hawks and eagles are GONE, slaughtered by the wind turbines. WIND TURBINES ARE EVIL. Or, perhaps I should say, conventional wind turbines are evil. It looks like this design will prevent bird-kill. Perhaps it will replace conventional turbines, for efficiency reasons. DISMANTLE ALL CONVENTIONAL WIND TURBINES!!
Wind turbines currently in use are serious noise polluters, people can't stand to live near one. And they are infamous bird killers.
There are people who's lives are ruined when those wind turbines are built near their homes, from the horrible noise, and they can't sell their homes and move: no one will buy them, because of the noise.
This would be great here in the Mojave desert. Even in low wind conditions it's still wind!! This would definitely give the energy company a run for it's money. I would love to have one in my backyard and get off the grid.
You have to be pretty stupid to think "most people don't even know what it is. They think it is a sculpture or something..." Fucking idiot. That or people in Iceland are retarded. I am going to go with the "former nuclear engineer" that now makes turbines out of a small shop. Probably why he is a former nuclear engineer. lmfao
They should just put gears on the conventional turbines so that there is more resistance in faster wind. That the gears would just generate more power, while slowing down the turbine. A gliding transition like some Mitsubishis have.
NREL National Renewable Energy Labs (US) stopped all testing on VAWTs because of inefficiency, unreliability and high cost of maintenance. I live close to an NREL test site near Boulder, CO. There are many standard 3 blade designs that undergo testing. As a hobby, I did a lot of research into renewable energy, especially wind turbines. Despite looking cool, I discovered that the VAWTs were essentially worthless.
It is not even close to being a new idea. Google Savonius turbine. The Savonius wind turbine was invented by the Finnish engineer Sigurd Johannes Savonius in 1922. The Savonious gets less efficient the higher the wind speed goes. It is fine for low speed things like water pumping or low power needs, but is very low efficiency compared to conventional turbines. The fact that it starts spinning in low wind is useless, because there is nearly no usable power in low wind speeds. The power available in wind goes up as the cube of the windspeed, so doubling the windspeed gives you 8 times as much power. 7.5 minutes of 8mph wind is worth 1 hour of 4mph wind is worth 8 hours of 2mph.
BTW this is not even close to windpower's biggest problem, storing electricity for when you need it is.
The problem with this tech is that it can't be built GRANDE without also having a netted cage around it which must be as big as the wheel itself if it's to be mounted anywhere near where people or animals live.
In its current design, it's a so called "Bird-eater/exterminator". . ;)
We have the same problem with the "S"-shaped vertical windmill. Excellent tech, but Seriously Dangerous to everyone around it. Many little kids fingers have been eaten by that one. ;)
You know how they keep saying that eagles get killed by the big windmills ? ( I think it just opponents of windmills that are saying it ) it would take a very stupid bird to kill itself on one of these type. in fact I don't think anyone would believe it if they said these were killing anything.
well I don't know about you, but I definitely want one of these bad boys at my house, in fact I want a dozen ! :D