the performance of a wind turbine calculation

[Pierre-Yves]

Are there relatively accessible software to calculate the performance of any wind turbine? I found Mecaflux http://www.mecaflux.com/ : does anyone know this beast? what are its possibilities? could we use it, for example for this wind turbine which is a bit out of the ordinary?
enerzine.com/3/5774+le-suedois-home-energy-has-concu-une-eolienne-spherique+.html

thank you !!

Pierre-Yves

[loop]

Hi Pierre-Yves

To know the maximum energy theoretically recoverable by a wind turbine, we apply Betz's law (which you probably know)
To find out a little more, consult this link:

http://www.mecaflux.com

To return to the efficiency of a machine, I will simply say that it is the ratio between the mechanical or electrical energy produced (as the case may be) and this theoretically recoverable energy.
This yield is global and will be different depending on the wind speed. The complete chain of outputs passing through the rotor, the generator, etc., and none of these elements has a fixed efficiency.
A good rotor must have good characteristics over the range of use to which it is to be subjected.

On the wind turbine presented, if I understood the description of its characteristics correctly, it is capable of producing 2.5 KW at 40 m / s. Knowing that the surface swept by the rotor is approximately 3 m2, the announced yield is frankly not up to par.
Perhaps the optimal speed is well below 40 m / s, I would even say that it is desirable because these wind speeds are very rare. You should see the curve, which is more telling.

A+

[joson2]

Hello,
to calculate the efficiency of your wind turbine you have 2 methods:

the simplest and generalist is to take 0.6 times the power of the wind reported on the surface of your wind turbine disc (limit of betz) and to multiply this result by the cumulative yield of mechanics, propeller, generator, transmission ... which is around 0.4 depending on the systems.
In general the final output revolves around 0.2 to 0.35 of the wind energy. Yes it is not much but as the wind is free it is already not bad. For more info on wind efficiency calculation
http://www.heliciel.com/helice/eolienne ... 20vent.htm

The second method is more complex and requires calculating the performance of the wind turbine according to the blade profiles and the lift and drag profiles used to build the wind propeller.
This method (blade elements) coupled with the froude theory (or the vortex theory) and corrected for blade tip loss factor gives the performances in terms of torque and axial thrust. Induced speeds are calculated.
This method is used by the helices and wind turbines calculation software
http://www.heliciel.com/logiciel-calcul ... liciel.htm