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Wind Power. Chris Santos, Sean Tegeder, and Christine Zaky 7A . What is Wind?. A natural source of energy. A power source that a essential part of the weather. Wind is moving air. Wind is invisible but we can still feel its force.

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Chris Santos, Sean Tegeder, and Christine Zaky 7A

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Wind Power

Chris Santos, Sean Tegeder, and Christine Zaky


What is Wind?

  • A natural source of energy.

  • A power source that a essential part of the weather.

  • Wind is moving air.

  • Wind is invisible but we can still feel its force.

  • Wind is a form of solar energy, this is because it is caused by uneven heating in the atmosphere.

Where is Wind?

  • Wind is all around us.

    The best places for wind farms are:

  • Coastal Areas

  • Tops of Rounded Hills

  • Open Plains

  • Gaps and Mountains

Advantages of Wind Energy

  • Wind is a free source, so wind farms need no fuel.

  • It produces no waste or greenhouse gases.

  • The land beneath can usually still be used for farming.

  • Wind farms can be tourist attractions.

  • A good method of supplying energy to remote areas.

  • Wind energy is also a renewable source.

Disadvantages of Wind Energy

  • The wind is not always predictable. The force varies.

  • Suitable areas for wind farms are usually near the coast, where land is very expensive.

  • Wind turbines are dangerous for birds. Migrating birds tend to like strong winds.

  • Can affect television reception.

  • When wind turbines are being manufactured, some pollution is produced.

  • The cost of wind turbines are very high. Wind turbines in 2007 ranged from 1.4 million dollars.

  • This can be very noisy.

    These disadvantagescankeepwind power from widespread use.

How do you use wind energy

  • Wind turbines change kinetic energy into mechanical energy.

  • With mechanical energy you can do certain tasks, such as pumping water.

  • Then a generator can change mechanical energy into electricity to power homes, schools, businesses etc.

  • Anemometer: measures wind speed and transmits wind speed data to a controller.

  • Blades: Wind moves over it and causes the blades to rotate.

  • Rotor: The blades and hub together.

  • Tower: The tower is make from tubular steel, concrete, steel lattice.

  • Brake: A disc brake to stop the rotor in emergencies.

  • Wind Vane- measures wind direction and communicates with the yaw drive.

Parts of the Wind Turbine

  • Controller: starts and shuts off the machines.

  • Gear box: gears connects the low speed shaft to the high speed shaft to increase the rotational speeds.

  • Generator: produces 60- cycle AC electricity.

  • High speed shafts: drives the generator.

  • Low speed shafts: rotor turns on the low speed shaft at about 30-60 rpm.

  • Yaw drive: used to keep the rotor facing into the wind as the wind direction changes.

Parts of the Wind Turbine

How the wind turbine works

  • Wind Turbines


  • The shape of the blade causes the wind pressure to be uneven. This causes the blade to spin generating electricity.

  • The blades connect to a shaft that rotates 18 RPM.

  • The shaft is connected to gears that rotate 1800 RPM.

  • Wind power is renewed easily because it comes from wind which is a natural source of energy and it is naturally replenished everyday.


  • Batteries- hold electricity produced even if the turbine is not running. It is stored instead of going directly to power lines.

  • Compressed Air- energy generated from the turbines is then converted into compressed air. This is stored in above ground tanks and underground caverns.

How Wind Power is Renewed and stored

  • Vertical Axis Wind turbines ( VAWT)-

  • Has the main rotor shaft arranged vertically.

  • Does not need to be pointed to the wind.

  • The generator and other components can be placed near the ground so the tower doesn’t need to support it.

  • Horizontal Axis Wind Turbines (HAWT)-

  • It has the main rotor shaft and electrical generator at the top of the tower.

  • They must be facing the wind.

Types of Wind Turbines

  • The costs and concerns of wind turbines keep it from widespread use.


  • The costs for a commercial wind turbine in 2007 ranged from 1.2 million dollars to 2.6 million dollars per MW.

  • The price has dropped in the past 10 years, but it still costs a lot. 80% is machinery and 20% is site preparation and installation.

Costs and Concerns

Fun Facts

  • Wind energy in 2007 was 1% of the United States energy.

  • The leading country to produce the most wind energy is Germany, followed by Spain, then the U.S.A.

  • 74,000 megawatts is the capacity of wind farms in the world.

  • Blades measure on average to be 130 feet.

  • Wind is named after the direction from which it comes.

  • It follows global and seasonal patterns.

  • What are two ways wind energy can be stored?

    Batteries and Compressed Air.

  • Why is wind energy easily replenished?

    Wind is a natural source of energy that occurs everyday.

  • What are two types of wind turbines?

    Horizontal axis wind turbine and vertical axis wind turbine.

  • Where are the best places for wind farms? (name at least two)

    Coastal areas, tops of rounded hills, open plains, gaps and mountains.

  • Wind is a form of ______ energy and is caused by _______ heating in the atmosphere.




  • "Centurion Energy." , LLC. Web. 09 Mar. 2012. <>.

  •  "EERE: Energy Savers Home Page." EERE: Energy Savers Home Page. Web. 09 Mar. 2012.

  • "Energy Resources: Wind Power." Andy Darvill's Science Site: Home. Web. 09 Mar. 2012.

  •  Parker, Steve. Wind Power. Milwaukee, WI: Gareth Stevens Pub., 2004. Print.

  • Wind Energy Basics." Wind Energy EIS Public Information Center. Web. 09 Mar. 2012.

  • "A Design and Technology Site." A Design and Technology Site. Web. 12 Mar. 2012. <>.


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