It’s Electrifying! © www.sustainablelearning.com.

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Presentation transcript:

It’s Electrifying! ©

Wind Energy (Part 1) (Almost) Everything you wanted to know about… PhotoPhoto by Kumeni CCCC PhotoPhoto by Kumeni CCCC

Wind Energy You might have seen the wind used in lots of different ways.

Where Does Wind Come From? We need to thank the sun As the sun warms the ground and sea it also warms the air When air gets hotter it rises When the hot air rises the space it leaves is replaced by cold air, which is heavier, this rushing movement of air is the wind.

The hot air rises The colder air falls… and rushes in to replace the hot air WIND FLOW The sun heats the land and the air WIND

The hot air rises The colder air falls… and rushes in to replace the hot air WIND FLOW The sun heats the land and the air WIND

Wind and tall buildings, hills and mountains If you have ever climbed a tall building, a hill or a mountain you will know it can be extremely windy at both the top and the bottom. Do you know why this is?

WIND Down Draft Up Draft

Wind Energy (Part 2) (Almost) Everything you wanted to know about… PhotoPhoto by Kumeni CCCC PhotoPhoto by Kumeni CCCC

Wind turbines turn kinetic energy (movement) from the wind into electrical power Wind provides sustainable energy. It is clean and renewable. It does not pollute the environment or use fossil fuels

How Can Wind Make Electricity? When the wind blows it pushes the blades on the turbine causing them to rotate. The spinning blades are connected to a shaft which is then connected to a gear box. This gear box helps the blades spin faster. The gear box is connected to a generator which produces the electricity. The turbines are also fitted with a brake. Wind blades generator brake gear box shaft

Wow, How Big?! If you’ve ever seen a wind turbine you will know they are huge! Wind turbines vary in size and height but a typical turbine is over 100 meters tall. That’s as tall as a 30-story building. If 20 giraffes stood on each others heads, they still wouldn’t be able to reach the top.

The turbine uses three blades which are each 35 meters long. The blades are designed to maximise efficiency and durability and minimise noise. To give you some idea about how huge they are, try measuring out 35 meters yourself. Blades

Aeroplane Propeller Blades Boat Propeller Blades Wind Turbine Blades

The Wind Farm Debate Advantages Wind power does not cause climate change or pollution Wind as energy is relatively cheap Wind is a renewable resource Wind farms can be placed in land or at sea and cause minimal harm to the natural environment around them. Disadvantages Damage to wildlife We can not always rely on when and where the wind will be blowing Some people do not like the way they look and complain about the noise from the turning of the blades.

Wind Energy in the UK The UK is the windiest country in Europe making it the perfect place for wind turbines. We currently have enough wind turbines in the UK to power 8 million homes.

Fact Attack! One windmill will provide power for over 1,200 homes. That’s enough power to make 180 million cups of tea a year! A group of turbines together is called a wind farm. These can be built on land or at sea Once they are in motion wind turbine blades can turn at speeds of between 45 and 180mph. That’s about as fast as a Formula 1 racing car!