Working With Wind Energy
Learning Objectives Learn about wind energy conversion Design a wind turbine Construct the wind turbine Test the wind turbine Evaluate Performance
A Wind Turbine The wind hits the blades… Shaft leads to a gearbox whose output leads to a generator to make electricity Usually has 2 or 3 blades WIND
24 - 25 SEP 2010
Many blade designs
Your Challenge Design, construct and test your own wind turbine design Lift weight – 15 cm as quickly as possible Maximum 1 minute No human interaction! Blowdryer at least 30cm away from turbine > 1ft, 30cm
Turbine Requirements Must have a rotor shaft around which to wind up given weight Must be freestanding (no human interaction) Must use only materials provided > 1ft, 30cm
Test Procedure Blowdryer at least 30 cm away from turbine No human interaction with turbine Attach weight around rotor Up to 1 minute to wind up weight for 15cm Record time to wind up weight > 1ft, 30cm
Materials wooden sticks aluminum foil, plastic wrap bendable wire tape, string wooden dowels paperclips paper, cardboard rubber bands Toothpicks
Procedure Teams of two (2) Develop and sketch your design Construct initial design Preliminary test Modify design, if necessary Final test
Evaluate Your Design Efficiency of design may depend on Cost of materials Speed (rotations per minute) Power (time to wind weight) Possible measure of efficiency: Eff. = (Cost of materials) / (time [sec] to lift weight) Are two designs that have the same rotational speed equally as “good”?