Alternative Energy Sources. Wind Turbines Wind: A General Description Wind energy- is a renewable...
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Transcript of Alternative Energy Sources. Wind Turbines Wind: A General Description Wind energy- is a renewable...
Alternative Energy Sources
Wind Turbines
Wind: A General Description
Wind energy- is a renewable resource that is used to create electrical energy. Wind- is a natural force that results from the
uneven heating of the earth from the sun.
What are wind turbines made of?
All wind turbines, are comprised of the following components: The Rotor is used to
convert the kinetic energy of wind into rotational force used to turn a generator
The Gearbox is used to change the speed and torque of the Rotor
The Generator (makes electricity)
Tower
Wind: Current Technology
Use of wind the fastest growing renewable, unlimited energy resource.
Wind maps determine suitable locations for “Wind farms”
“Wind farms” currently provide ________ MW of electricity.
Wind Technology: “Wind Map”
Wind Technology: “Wind Map”
Jiminy Peak, Hancock Mass.- The Zephyr Turbine
www.jiminypeak.com
The purpose of a wind turbine rotor is to convert the kinetic energy of wind into rotational force used to turn a generator.
Blade Design Tradeoffs
Blade size Bigger = more surface available to catch wind Bigger blades weigh more
Blade Design Tradeoffs
Shape & number All blades must produce lift to work. To do this an
airfoil must be created, this is done in many ways depending on size, price and material used.
Airfoil
Airfoil A surface designed to produce lift from the movement of air over it.
Aerodynamics
Aerodynamics the study of the flow of air around and through an object.
Blade Orientation
Leading edge of each blade needs to point towards the next blade’s trailing edge. In order to sustain motion.
HUB
Wind Turbine Blade
Leading Edge
Trailing Edge
Blade Pitch
The Blade Pitch is the angle of the rotor blade in relation to the rotor.
When you have the correct pitch your rotor will spin
When you have too much pitch the rotor will stall (will not spin)