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
Advice for small wind turbine
- chatelot16
- Econologue expert
- posts: 6960
- Registration: 11/11/07, 17:33
- Location: Angouleme
- x 264
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 Tomorrow it will be just a test without the wind turbine.
Last edited by darwenn the 30 / 12 / 09, 21: 36, 1 edited once.
0 x
- Grelinette
- Econologue expert
- posts: 2007
- Registration: 27/08/08, 15:42
- Location: Provence
- x 272
I come back to the technology of a wind turbine with 2 counter-rotating propellers which would double the relative speed.
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):
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
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):
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
0 x
Project of the horse-drawn-hybrid - The project econology
"The search for progress does not exclude the love of tradition"
"The search for progress does not exclude the love of tradition"
- chatelot16
- Econologue expert
- posts: 6960
- Registration: 11/11/07, 17:33
- Location: Angouleme
- x 264
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
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
0 x
-
- Similar topics
- Replies
- views
- Last message
-
- 4 Replies
- 7488 views
-
Last message by chatelot16
View the latest post
17/11/14, 14:10A subject posted in the forum : Hydraulic, wind, geothermal, marine energy, biogas ...
-
- 38 Replies
- 14954 views
-
Last message by Macro
View the latest post
10/01/13, 10:29A subject posted in the forum : Hydraulic, wind, geothermal, marine energy, biogas ...
-
- 7 Replies
- 8905 views
-
Last message by papynou
View the latest post
23/07/11, 09:36A subject posted in the forum : Hydraulic, wind, geothermal, marine energy, biogas ...
-
- 72 Replies
- 32172 views
-
Last message by dodo
View the latest post
06/03/11, 21:57A subject posted in the forum : Hydraulic, wind, geothermal, marine energy, biogas ...
-
- 1 Replies
- 2369 views
-
Last message by Christophe
View the latest post
21/04/09, 19:50A subject posted in the forum : Hydraulic, wind, geothermal, marine energy, biogas ...
Back to "hydraulic, wind, geothermal, marine energy, biogas ..."
Who is online ?
Users browsing this forum : Bing [Bot] and 200 guests