Wind Speed, Power Chart

Power in the wind
local
wind
speed
power in the wind Our System
200,000 square
feet of wind area
Tower Windmill
200 foot diameter
31,400 square
feet of wind area
Cost ~$1.8 millionCost ~$15 million
watts/
square
foot
watts/
(our)
total
area
KW electricity outMaximum
mech'l
speed
KW electricity outMaximum
mech'l
speed
0 mph 0.00 0 kW 0 kW 0 mph 0 kWNot used
2 mph 0.04 8 kW 2 kW 8 mph 0 kWNot used
4 mph 0.32 65 kW 20 kW 16 mph 0 kWNot used
6 mph 1.08 200 kW 60 kW 24 mph 0 kWNot used
8 mph 2.56 500 kW150 kW 32 mph 30 kW 48 mph
10 mph 5.0 1000 kW290 kW 40 mph 60 kW 60 mph
12 mph 8.6 1700 kW500 kW 48 mph 110 kW 72 mph
14 mph 13.7 2700 kW800 kW 56 mph 170 kW 84 mph
16 mph20.54100 kW1200 kW64 mph250 kW96 mph
18 mph 29.2 5900 kW1700 kW 72 mph 360 kW108 mph
20 mph 40 8000 kW2300 kW 80 mph 490 kW120 mph
22 mph 53.2 10600 kW3100 kW 88 mph 650 kW132 mph
24 mph 69.1 13900 kW4000 kW 96 mph 850 kW144 mph
26 mph 87.9 17500 kW5100 kW 104 mph1080 kW156 mph
28 mph110 22000 kW6400 kW 112 mph1350 kW168 mph
30 mph135 27000 kW7900 kW 120 mph1660 kW180 mph
32 mph164 32800 kW9600 kW 128 mph1970 kW192 mph
34 mph197 39400 kW11500 kW 136 mphDangerous
36 mph233 46600 kW13700 kW 144 mphDangerous
38 mph274 55000 kW16100 kW 152 mphDangerous
40 mph320 64000 kW18700 kW 160 mphDangerous
.
Even at extreme windspeeds, no mechanical danger exists, so maximum limit is unknown System rated at
1800 kW ABSOLUTE
maximum
These windspeeds are at the height, which is commonly twice what the ground windspeeds are. If ground windspeed in a storm got to 40 mph, the wind speed at the top of a tower windmill could be in excess of 120 mph. Because of the design concept of the high-tip-speed tower windmills, the outermost tips travel at around 6 times the local windspeed, in other words, around 720 mph! That is in excess of the speed of sound, and the enormous rotor would likely disintegrate due to any of a variety of mechanical problems, centrifugal force, vibration, sonic boom shock waves, etc. Therefore, tower windmills are rarely run when the wind is much over 30 mph. And they are too inefficient when the wind is less than 10 mph. So there is a Capacity Factor of between 21% and 34% of how regularly it can actually operate. In contrast, our system operates at much lower mechanical speeds, and as long as the rotor was built reasonably balanced, it should easily withstand any windspeed that could occur, and even be producing electricity at the time!