Harnessing Wind Energy Kevin Dahm July 9, 2007. Sailboats The sail dates back to at least 4000 B.C., when Egyptians developed square papyrus sails.

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Presentation transcript:

Harnessing Wind Energy Kevin Dahm July 9, 2007

Sailboats The sail dates back to at least 4000 B.C., when Egyptians developed square papyrus sails

ACTIVITY Using the materials provided, design and construct a sail that will power the raft. Using the materials provided, design and construct a sail that will power the raft. Try to predict which materials/sizes/shapes will catch the wind most effectively. Try to predict which materials/sizes/shapes will catch the wind most effectively.

ACTIVITY Using the materials provided, design and construct a sail that will power the raft. Using the materials provided, design and construct a sail that will power the raft. Try to predict which materials/sizes/shapes will catch the wind most effectively. Try to predict which materials/sizes/shapes will catch the wind most effectively. This activity is taken from an Engineering is Elementary module, “Catching the Wind.” This activity is taken from an Engineering is Elementary module, “Catching the Wind.”

Designing Windmills

Dates to at least 400 BC Dates to at least 900 AD

Modern Energy Systems

Question What kind of engineering is this? Discuss with neighbors for 30 seconds.

Modern Energy Systems

Cape Wind: Wind farm off Cape Cod

Cape Wind Why would anyone think this is a bad idea?

Cape Wind Critics Aesthetics Aesthetics

Cape Wind

Cape Wind Critics Aesthetics Aesthetics Navigation hazard Navigation hazard Air traffic hazard (each turbine is taller than the statue of liberty) Air traffic hazard (each turbine is taller than the statue of liberty) Create false radar signals Create false radar signals

Cape Wind Critics Aesthetics Aesthetics Navigation hazard Navigation hazard Air traffic hazard (each turbine is taller than the statue of liberty) Air traffic hazard (each turbine is taller than the statue of liberty) Create false radar signals Create false radar signals Local environmental impact Local environmental impact Birds Birds Fish Fish

Take home messages Multiple solutions to any problem Multiple solutions to any problem Engineering practice: Predict, design, build, test, improve Engineering practice: Predict, design, build, test, improve Don’t fall in love with your first idea! Don’t fall in love with your first idea!

Mechanical Engineers design and produce machines that perform specific tasks Electrical Engineers design systems that generate, deliver and use electricity Civil Engineers design and oversee construction of society’s infrastructure

Linkage to math: Use stopwatch to determine rate at which different sailboats are moving Linkage to societal issues: Solutions to technical problems must be efficient, economical and effective in a societal/global context

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