by: harsh shah david fontana dan leonard bobby gylling
TRANSCRIPT
By:Harsh Shah
David FontanaDan LeonardBobby Gylling
Earliest use in sail boats First windmills used for:
Grain-grindingWater pumping
Vertical Windmill Made in Persia 500-600 A.D.
Modern Windmill Steel blade 6 Million installed First one for electricity
Requirements Turbine Generator 10 mi/h winds
Types Offshore Onshore Near-shore
$8000-$1,500,000 Pays for itself over time Funded by Government or Investors Depends on distance to city Subsidies – tax cuts
30¢ per kilowatt-hour in 1980 5¢ per kilowatt-hour today 80% decrease Continue to decrease
Larger and more plants Technological advances
Theoretical Potential Output Satisfy energy need 5 times Satisfy electrical need 35 times
Actual Predictions Only 20% captured
Requires 13% global land Distance barriers
Least polluting alternative fuel Clean fuel
No Fuel No Emissions Land is only resource
Indirectly reduces emissions
Wild birds are endangered Noise pollution
Interfere with TV signals Interfere with sea animals
Visual effect
http://youtube.com/watch?v=nt3mGDZmdYQ