Name: Vertical Axis Twin Rotor Turbine
Horizontal Rotation
Foundation: Concrete
16 feet square
42
inches deep
Turbine: Each 2.5 kW section (without pole in
the middle) = 7500 lbs
Pole: Three 19-foot sections
1500 lbs
5kW = power to generate 80 60-watt light bulbs
Wind speed: 6 mph to make power
ALH does not store power, will use power generated
ALH base usage = 13 kW per hour (average over 24 hours)
Wind speed to reach 5 kW is 11 meters per second
Manufacturer: Alternative Energy Solutions
(Formerly Aeronet)
Assembly Time: 3 days
Hoist: 1 day
Current Wind Speed at Location (per recorded anemometer)
Avg night – 5.25 mph
Avg day – 12 mph
Cut-Off Speed: Cut off at 20 meters per second
Wind speed: 6 mph to make power. Turns at 6-7
mph (2.24 meters per second). When up to 10 mph more energy
produced. 15-20 significant energy produces (about 6 meters per
second). Annual avg wind of 8 mps, (20 stories up in Chicago or
San Francisco are about 8 mps). Western Kansas gets significant
winds of 8 mps.
Max turbine speed: = 25 mph wind speed,
maximum to 39 mph until it furls.
Max power will serve ALH with 1/3 of daily power use
Why this turbine style vs. typical horizontal blades?
Minimizes bird kill because birds can see it. Minimizes ice
throw due to slow turn speed. No noise. On a typical 3-blade
horizontal turbine, the tips of the blades are going faster than
the middle, thus creating sound. This turbine spins at the same
rate of speed as the wind, thus producing no noise.