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7/22/2019 Wind Turbine Blade Design Project PPT
http://slidepdf.com/reader/full/wind-turbine-blade-design-project-ppt 1/18
Alternatives to Electricity
Generation?
7/22/2019 Wind Turbine Blade Design Project PPT
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What do we commonly use
electricity for?
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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Where does all of this electricity
come from?
• Brainstorm together where the energy we
use on a day-to-day basis is generated.
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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The Reality of United States
Energy Production• Fossil Fuels 70%
• Nuclear 20%
• Hydro 7%
• Renewables 2.5 %
• Other 0.5%
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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Typical Coal Fired Power Plant
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
http://slidepdf.com/reader/full/wind-turbine-blade-design-project-ppt 7/18
KidWind Project | www.kidwind.org
What does a wind turbine do?
7/22/2019 Wind Turbine Blade Design Project PPT
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7/22/2019 Wind Turbine Blade Design Project PPT
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Many Different Rotors…
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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Wind Turbine Blade Challenge• Students perform
experiments and designdifferent wind turbine blades
• Test one variable while
holding others constant
• Record performance with a
multimeter or other loaddevice
• Goals: Produce the most
voltage – Minimize Drag
– Maximize LIFT – Harness the POWER of the
wind!
7/22/2019 Wind Turbine Blade Design Project PPT
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Price Performance Ratio?
What does it mean?
• Ability to deliver
performance for it’s price(in this case, cost)
= _ Price _
Performance
• Will be using the total
cost of design per current
generated (A)
What can it communicate
to us?
• What kind of values do we want
for price? What aboutperformance?
• What does a lower ratio value
communicate? A higher value?
• What can we determine about
everyone’s designs if we
compare all values?
7/22/2019 Wind Turbine Blade Design Project PPT
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REVISITING YOUR DESIGN
Rethinking design characteristics:
7/22/2019 Wind Turbine Blade Design Project PPT
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Airfoil Shape
Just like the wings of an airplane,
wind turbine blades use the
airfoil shape to create lift and
maximize efficiency.
The Bernoulli Effect
7/22/2019 Wind Turbine Blade Design Project PPT
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Lift/Drag Forces
Experienced by
Turbine Blades
KidWind Project | www.kidwind.org
7/22/2019 Wind Turbine Blade Design Project PPT
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Twist & Taper
•Speed through the air of apoint on the blade changes
with distance from hub
• Therefore, tip speed ratio
varies as well
• To optimize angle of attackall along blade, it must twist
from root to tip
Fast
Faster
Fastest
7/22/2019 Wind Turbine Blade Design Project PPT
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Manufacturing Blades
The blade mold (left) is lined with layers of fiberglass, then injected with epoxy
resin. To enhance stiffness, a layer of wood is placed between the fiberglass
layers. The two molds are joined and adhered together using a special liquid
epoxy, which evenly joins the two sides of the blade.
Finally, the whole mold is baked like a cake! 8 hours at 70 degrees C.
7/22/2019 Wind Turbine Blade Design Project PPT
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7/22/2019 Wind Turbine Blade Design Project PPT
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Time to Re-Design!