1. Making an anemometer

5. Power from the wind Power in the wind Power in the wind Effect of air density,  Effect of air density,  Effect of swept area, A Effect of swept area, A Effect of wind speed, V Effect of wind speed, V R Power in the Wind = ½ρAV 3

6. Wind Speed (V)  Most important part of equation  Power is a cubic function of wind speed ◦ V X V X V ◦ 20% increase in wind speed means 73% more power ◦ Doubling wind speed means 8 times more power (power = (power =½ρAV 3 )

7.  Same turbine, two different wind regimes: ◦ Yampa (8.3 mph)  1,200 kWh/year ◦ Sheep Mtn: (18.4 mph)  6,500 kWh/year

8. “