A wind turbine with sails, the wind turbine at the nail!
- Lietseu
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Good evening everyone, I raise the subject, we welcome Mr. Sarazin tonight ...
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By removing Human Nature, he was far from his nature! Lietseu
"The power of love, must be stronger than the love of power" contemporary Lie Tzu?
One sees clearly only with the heart, the essential is invisible to the eyes ...
"The power of love, must be stronger than the love of power" contemporary Lie Tzu?
One sees clearly only with the heart, the essential is invisible to the eyes ...
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When you have impact machines, ie a big board that makes the fluid "spin dry", the limit is no longer valid.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.
@+
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When you have impact machines, ie a big board that makes the fluid "spin dry", the limit is no longer valid.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.
@+
Obelix wrote: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
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