7
The BLACK wind turbines use the kinetic energy of the wind. The rotor blades are powered
of this energy and inside the generator, this energy gets converted to three-phase AC. The
energy, which is stored inside the wind, raises to the third power to the wind speed, therefore
it is to be expected that when the wind speed is as double as before, you will get 8 times as
much energy as before.
m/s W/m 2
m/s
W/m 2
m/s
W/m 2
0 0
8 313,6 16 2508,8
1 0,6
9 446,5
17 3009,2
2 4,9
10 612,5
18 3572,1
3 16,5
11 815,2
19 4201,1
4 39,2
12 1058,4
20 4900,0
5 76,5
13 1345,7
21 5672,4
6 132,3
14 1680,7
22 6521,9
7 210,1
15 2067,2 23 7452,3
**) for an air density of 1,225 kg/m³, which corresponds
dry air at normal atmospheric air pressure at sea level with
15° C.
The formula for the output per m² in Watt = 0,5 * 1,225 *
v 3 , v is the wind speed in m/s
The rotor blades are aerodynamically optimized, sounds are hardly recognizable. On lower
rotary speeds up to 400 rotations per minute, almost no sounds can be recognized.
The combination of a holding-torque-free and a detent-torque-free generator and a balanced
rotor blade allows to having a start-up from 0,8 m/s and a charging process from 1,8 m/sec.
