Energy Transformations

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Energy Transformations

But what about the wind?

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Where Does Wind Energy Come From?

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Where Does Wind Energy Come From?

Wind energy is an indirect form of solar energy.

Between 1 - 2% of thesolar radiation thatreaches the Earth isconverted into energyin the wind.

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That’s about 50 to 100 times the energy thatis converted from all the plants on earththrough photosynthesis!

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But what makes wind?

Winds result from an unequal heating of different parts of the Earth's surface, causing cooler dense air to circulate to replace warmer, lighter air.

http://teachingboxes.org/jsp/teachingboxes/weatherEssentials/wind/sequence/lesson3_activity1.jsp

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Radiant (Solar) EnergyWarms land and water

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Radiant (Solar) EnergyWarms land and water

Thermal Energy—but the warming is not even

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Radiant (Solar) EnergyWarms land and water

If the land is warmer

than the water it makes

Thermal Energy

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Radiant (Solar) EnergyWarms land and waterIf the land

is warmer than the water

Thermal Energy

Motion Energy

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Making Wind Work for Us—

Windmills come in all shapes

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and all sizes

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Windmill Components

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Windmills and energy transformation

1. Solar (Radiant) Energy warms the earth (Thermal Energy)

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Windmills and energy transformation

1. Solar (Radiant) Energy warms the earth (Thermal Energy)

2. Thermal Energy makes warm air riseCooler air moves in to replace the warm airAnd you have WIND—Motion Energy

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Windmills and energy transformation

1. Solar (Radiant) Energy warms the earth (Thermal Energy)

2. Thermal Energy makes warm air riseCooler air moves in to replace the warm airAnd you have WIND—Motion Energy

3. Wind moves the blades which spin the shaft and the turbine (more Motion Energy)

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Windmills and energy transformation

1. Solar (Radiant) Energy warms the earth (Thermal Energy)

2. Thermal Energy makes warm air riseCooler air moves in to replace the warm airAnd you have WIND—Motion Energy

3. Wind moves the blades which spin the shaft and the turbine (more Motion Energy)

4. The spinning turbine makes Electrical Energy

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Bringing electrical energy to our homes, schools and businesses…

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Your Challenge…

Transform wind intoelectrical energy

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Resources

http://www.rise.org.au/info/Res/wind/index.html#what

http://teachingboxes.org/jsp/teachingboxes/weatherEssentials/wind/sequence/lesson3_activity1.jsp

http://www.kidwind.org/materials/ppointshows.html