1. Shane Romero Lillian Tong An Tran
Wind
Shane Romero
Lillian Tong
An Tran

2. Source
When the earth is unevenly distributed by the sun, the land and sea are warmed, driving a global atmospheric system.
Wind energy is converted through friction into diffuse heat throughout the earth’s surface and atmosphere.
Wind power is the conversion of wind energy to a useful form of energy, such as using wind turbines, windmills, and wind pumps.

3. Efficiency & Cost
on going costs- low. Moderate capital cost. Marginal cost= 1 ¢ per KW · h
U.S. wind power industry makes $5 million a year—which is, considered little compared to other energy industries like nuclear power energy.

4. Equipment extraction& use
Turbines are used to extract power from wind. Shafts attached to a gear drives another gear attached to a generator. Inside is a magnet surrounded by a coil as the magnet spins. It generates through the coil that creates electric current called the AC
Used in power plants and to power houses and buildings

5. Wind Turbine

6. Consumption/Usage U.S. & World
Use increases 30% annually
Used mostly in Europe, Asia, and U.S.
19% is used in Demark
9% in Spain & Portugal
6% in Germany & Ireland
Accounts for 2.3% of the energy in the U.S.

7. Advantages Doesn’t cause greenhouse gases/other pollutants
Takes up small portions of land—less space than an average power station
Comes in various sizes—big for businesses & small for households
Very cheap
Great for developed/developing countries—steady, reliable, supply of electricity
Wind is a lot cleaner than other energy sources

8. Disadvantages
Not dependable—for it to work, you must have consistent wind
Gives off interference to TV & radio signals
Kills birds—they don’t see the blades b/c it moves so fast and they run into it
Noisy
Can be damaged in heavy weather and repair costs are usually expensive