Endless Sphere

Theoretical maximum efficency of a wind turbine is 16/27 or ca. 59%, this is physic and impossible to surpass (Betz's law) Typical 3 blade rotors are able to reach around 30% efficiency. A wind turbie 5 times better is impossible. In reality this design will have a much lower efficency. The startin...

SlowCo wrote: ↑

Feb 13 2022 8:00am

That looks more like wings for a plane then windturbine.
Curious to see how this turns out.

Yes H-darrieus VAWTs are like this.

Here is the wing tip / winglet.
Final aspect ratio will be 8.

My wings look like this day before yesterday.

No they claim 74% of the wind energy into network...that is an exuberant claim. . So they are calculating a theoretical energy input ...swept area, wind speed, air density , etc etc ....at a optimum speed.... ...and then comparing that to electrical energy output ? With no reference to generator ma...

1 m/s has very little energy...the gail wind that brought water on the streets of New York was peaking 62 m/s second...that has 37.44 times more energy than 10 m/s wind.

Modest developement on my version 4 today of the prototype.

Yellow wing on the back is from the old set up with 1 m shorter moment arm.

Chalo wrote: ↑

Oct 13 2021 11:40pm

topspeed wrote: ↑

Oct 13 2021 11:00pm

Chalo wrote: ↑

Oct 13 2021 3:06am

Maybe you should wonder why everybody isn't using their tech.

I know why they aren't using them....it creates 74% only at 5.25 m/s wind.....and has just 10 year warranty for the blades.

One of two conjectures verified.

Which one ?

Then there is ANEW which claims 74% efficiency: Try to distinguish between claims, credible claims, and facts. Everything in the alternative energy sector makes much more sense when you do. I am just wondering how a company that has operated since 1989 can advertise 74% efficiency...if it is not tr...

Then there is ANEW which claims 74% efficiency: Try to distinguish between claims, credible claims, and facts. Everything in the alternative energy sector makes much more sense when you do. I am just wondering how a company that has operated since 1989 can advertise 74% efficiency...if it is not tr...

59% is the maximum kinetic recovery from ANY wind design. period. Except when you do this: Ducted does capture the air flow and increase the velocity. Many draw backs, size and tracking the wind direction. Not cheap. I have seen some very efficient turbine designed. I have also seen them when they ...

Hillhater wrote: ↑

Oct 11 2021 10:51pm

topspeed wrote: ↑

Oct 11 2021 1:32am

Big spinner also helps..but has to be counted in capture area as well.

miilun_spinneri.jpg

I have no idea what that is a photo of.......but i am sure it is not a wind turbine ?

Six bladed wind turbine, with adjustable self regulating pitch.

Homemade design.

ZeroEm wrote: ↑

Oct 05 2021 9:34am

Ducted does capture the air flow and increase the velocity. Many draw backs, size and tracking the wind direction. Not cheap.

Big spinner also helps..but has to be counted in capture area as well.

No they claim 74% of the wind energy into network...that is an exuberant claim. . So they are calculating a theoretical energy input ...swept area, wind speed, air density , etc etc ....at a optimum speed.... ...and then comparing that to electrical energy output ? With no reference to generator ma...

That will be 74% of the theoretical maximum impeller efficiency which is only about 45% so in reality actual efficiency would only be around 30%. I'm guessing that's total efficiency though, electrical output because they wouldn't be making a big deal about it otherwise seeing as you can get over 4...

Small polish turbine factory delivers 74% efficient VAWTs ( only in small winds sadly ). What does this mean exactly ? 74% of max generator capacity in optimum wind conditions ? That is what ANEW company claims of putting electricity into network for their B1 turbine at 5.25 m/s wind. https://www.e...

Small polish turbine factory delivers 74% efficient VAWTs ( only in small winds sadly ).

https://www.youtube.com/watch?v=EM-gCvhQhPU

I went down this rabbit hole back in 05 and 06. I built numerous prototypes using Delco alternators rewound and fitted with permanent magnets. I got some worthwhile power and would have continued except that during a nasty storm one of turbines disintegrated. One blade went over the house and imbed...

ZeroEm wrote: ↑

Sep 13 2021 9:44am

That is a lot of bone.

Lot of stitches to stop bleeding...I measured around 500 ml loss of blood.

What was very vicious about it was that it did not hurt...so docs never realized it was the culprit of my total infection spiral.

And after some further dental deep cleaning and sports I have now lost 18 kg ( 40 lbs ) of my top weight of the spring.

neptronix wrote: ↑

May 25 2021 12:50pm

wow, pretty heavy tooth. I'd like to see it.

I am now 10 kilos lighter after some cycling.

Piece of jaw came with it.

I got mine removed about 4 weeks ago...now I am 7 kilos lighter.

I did get rid of a bacteria infection as well.

I am going to build a small scale VAWT out of composite materials with the goal of charging an EV in wilderness areas supplementing solar and standard plug-in charging. My initial plan is as follows. I would love to have comments and criticism and "I've tried that befores." Basic design b...

Yes hammer is used to belt the 60 cm by 14 mm steel rods into ground. Are you trying to give as little information as possible on your VAWT or what? If it's your little secret then fine, keep it to yourself. I don't understand the point of these weird photos that don't show anything and cryptic one...

Well....thanks for the trip to Moscow.

Some USSR systems still visible.

But...enjoy while it lasts: https://www.youtube.com/watch?v=nS5_EQg ... bA&index=5