+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
2
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
3
WINDWIND
24 - 25 SEP 2010
4
+ Many blade designs5
+Your Challenge
Design, construct and test your own wind turbine design
Lift weight – 15 cmas quickly as possible
Maximum 1 minute
No human interaction!
Blowdryer at least30cm away from turbine
6
> 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
7
> 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
8
> 1ft, 30cm
+Materials
9
+Procedure
Teams of two (2)
Develop and sketch your design
Construct initial design
Preliminary test
Modify design, if necessary
Final test
10
+Evaluate Your Design
Efficiency of design may depend onCost of materialsSpeed (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”?
11