1. Wind Power

2. Wind Patterns Global winds Sea and land breezes Valley winds

3. Global Wind

4. Sea, land, and valley winds

5. Wind Rose Direction Speed Frequency

6. Equations Wind power increases as the square of diameter, but cube of wind speed

7. Scaling (Example) A wind turbine (d=3m) generates 10 kW of power at wind speed of 4 m/s. How much power will it produce If the turbine diameter were increased to 6 m? If wind speed suddenly increased to 12 m/s? With the same wind conditions, would turbine produce more power in winter or summer?

8. Wind Turbine Principle of operation

9. Design Considerations Rotor Size Number of blades Gearbox Generator Controls

10. Advantages and Disadvantages Advantages Clean Renewable Disadvantages Intermittent Wind speed not too slow, not too fast Noise Aesthetic Dangers to birds

11. Siting Wide areas with open views in all direction Valleys and ridges Close to power grid Away from towns and population centers

12. Future