A wind turbine with sails, the wind turbine at the nail!

[Lietseu]

I prefer that nuclear, you do not?

[Lietseu]

Good evening everyone, I raise the subject, we welcome Mr. Sarazin tonight ...

[Remundo]

Hello,

Ah, I will quibble ...

Betz's limit is 16final match.

Or around 59%.

Valid for machines with permanent flow of perfect fluid, ie with a good approximation for three-bladed wind turbines.

When you have impact machines, ie a big board that makes the fluid "spin dry", the limit is no longer valid.

The limiting case is that of the Pelton turbine (for water), which theoretically yields 100% when the blade returns the fluid to 180 ° and the blade speed is half that of the fluid.

@+

Hello,

Hello :
Betz's law says that one can only extract from a flux a power at most equal to 11 / 27 of the power present.
That's all !

The power calculation formula can be applied to the wind turbine described:
Diameter 12m sail height 4m Brushed surface 48M²
Either power = 1 / 2 x 1.25 x 48 x 10 x 10 x 10
P = 30 Kw
It remains to determine the efficiency of the system to recover energy. According to the law of Betz he can not be superior to 11 / 27 P is 12.222 Kw!

Obelix