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Wind Turbines

Wind Turbines. How does wind produce electricity?. Draw what you think a wind turbine looks like. Photo by Wendy Francesconi. Photo by David Carroll. Facts about large wind turbines. Cost 1.2 to 2.6 million dollars each Rotors up to 90m in diameter on land and 110m on water

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Wind Turbines

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  1. Wind Turbines

  2. How does wind produce electricity?

  3. Draw what you think a wind turbine looks like.

  4. Photo by Wendy Francesconi

  5. Photo by David Carroll

  6. Facts about large wind turbines • Cost 1.2 to 2.6 million dollars each • Rotors up to 90m in diameter on land and 110m on water • Rotors spin 15 to 50 rotations per minute (rpms) • Each generates up to 2 megawatts of electricity (that’s enough power for 600 houses!)

  7. Photo by David Carroll

  8. Facts about small wind turbines • Cost 3000 to 6000 dollars each • Rotors only a couple meters in diameter • Rotors spin 175 to 500 rotations per minute (rpms) • Produce one kilowatt of electricity (a little less than what is needed to power most houses)

  9. Wind Turbine Safety • Have built-in brakes for when the rotor goes too fast • Kill 40,000 birds annually • But cats and power lines each kill 100’s of millions

  10. Find pictures online of all sorts of wind turbine designs—small and large, vertical and horizontal, real ones and plans for new kinds—and show them here to encourage discussion.

  11. Wind Turbine Animationhttp://www1.eere.energy.gov/windandhydro/wind_animation.html

  12. Wind Turbine Diagram with Labelshttp://energiaeoliana.wordpress.com/2008/03/13/how-a-wind-turbine-works/

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