Advice for small wind turbine

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chatelot16
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by chatelot16 » 30/12/09, 21:13

rotate the stator ??? with current output by ring and carbon ... very complicated for not much

if there is a need for more speed the mechanical multiplier with belt or gear is not for nothing

2 counter rotating propeller, of course, but a single larger propeller is simpler, but the larger it is the more it rotates slowly: once again it is with mechanical multiplication that it will work best
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darwenn
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by darwenn » 30/12/09, 21:34

I have already done it several times with strong wind and a hoist during my self-construction tests, here in the north we are not afraid : Cheesy: Tomorrow it will be just a test without the wind turbine.
Last edited by darwenn the 30 / 12 / 09, 21: 36, 1 edited once.
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Forhorse
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by Forhorse » 30/12/09, 21:36

In addition we must be able to use an elispcycloidal reducer to take advantage of this rotation in the opposite direction of the two propellers in order to add the two rotation.
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zorglub
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by zorglub » 30/12/09, 22:16

good evening!

I am a newcomer, and I realize that you are pro in the wind

Do you think that with a 12 v / 40 A car alternator, I can make a wind turbine?
the biggest problem is making the blades? do you have any idea
please
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by darwenn » 31/12/09, 08:15

Hello Zorglub, the best is that you make another subject on it, otherwise we will not be there anymore.
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loop
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by loop » 31/12/09, 08:54

Hello everyone,

It looks good for us guys from the North
Ideal direction for my wind turbine

Image
Image

A +
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darwenn
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by darwenn » 31/12/09, 12:48

Well, no, the ideal direction is west, south west, which is fortunately the direction of the wind frequency with us, my habitatio, obstructs the north wind, but if the north wind is blowing at least 40 it should be fine :).
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by Grelinette » 31/12/09, 18:23

I come back to the technology of a wind turbine with 2 counter-rotating propellers which would double the relative speed.

chatelot16 wrote:... if there is a need for more speed the mechanical multiplier with belt or gear is not for nothing
2 counter rotating propeller, of course, but a single larger propeller is simpler, but the larger it is the more it rotates slowly: once again it is with mechanical multiplication that it will work best

I think that a mechanical multiplication would reduce the torque enormously, and in light winds it is already not easy to have enough speed and force to produce current.

It would be interesting to have a complete comparison (installation cost, electrical production in light winds, etc.) between these 4 technologies:

- classic small wind turbine
- 2 small classic wind turbines
- small wind turbine with 2 counter-rotating propellers
- larger wind turbine (twice the surface area)

A few months ago I had fun doing this (must find a recycling for his old CDs):
Image

and this is how it turns out (I hope you can read this video which I could not download on the site):
http://grelinette.free.fr/Eoliennefuturiste%202.MOV
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chatelot16
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by chatelot16 » 31/12/09, 18:38

there were long ago large wind turbine with 2 counter rotating rotor with very large number of blades: two rotor of the same diameter one against the other

the lower the number of blades the more unnecessary the rotary counter

with a large number of blades we have an incidence of 45 ° and the air comes out while turning, a 2nd rotor is useful

with the 2 or 3 blades the angle of incidence is much lower the 2nd propeller is of no interest

your wind turbine shows another interesting idea: separate the propeller into 2 different diameters

can be a way to widen the range of usable wind: large diameter for weak winds, small diameter for strong winds

when the wind is too strong for the big one we stop it completely and we are happy with the small one
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by darwenn » 31/12/09, 18:51

what was on the CDs? the type of music that can also play on the rotation speed : Cheesy:
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