Wind turbines

Presentation

✍  Explain with your own words what’s the function of wind turbine. Complete the diagram below with types of energy enters and exits the wind turbine:[pic 3]

[pic 4][pic 5][pic 6]

[pic 7][pic 8]

✍  Make short research on the web to explain what is a “Green and renewable energy”.[pic 9]

How it works ?                           “Introduction part one”

✍  Watch the first part of the video twice (“introduction - part one”). Fill in the blanks while and after listening. (one blank = one word)

“ You may have been driving through the countryside and suddenly come up on something like a ______ ________ with big _______ __________ at the top rotating and you wonder what it is: it is a ______   _________.

The purpose of this is to __________ ___________ and they tend to be extremely big so you see them in the distance, but when you get close to them, they are very big.

The other problem with them is they do produce __________, so be careful, but it's ________ __________. Many people find it very ___________ the _______ these things make as these __________  ________ past you. So be aware of that.

All it is, is basically a tall, concrete, stress __________ _______ and on top of it, is a generator, an __________ ___________. The electric generator is very simple, it can be ___________ right on the top of here and it ___  _______ directly by the ____ blade. “

✍           What are the main components of a wind turbine ?[pic 10]

✍           Point them out on the picture below.

[pic 11][pic 12]

✍           What is the goal of the wind turbine?[pic 13]

✍    What kind of environmental impact does the system create        ?[pic 14]

✍           How does the electric generator move?[pic 15]

How it works ?                           “Introduction part two”

✍  Watch the second part of the video twice (“introduction - part two”). Fill in the blanks while and after listening. (one blank = one word)

“Now obviously, there is at this point what we call a ______ _____ because, obviously, the ______ _______ _______ quite slowly and if it went round that _______, the __________

wouldn't  generate much __________. But there is a gear box to _______ __ the ________ in the generator so even though this goes round quite slowly, the generator is at its ____ ________ and will generate electricity.

This electricity then is fed down the tower and out to the __________ _____ where it can __________ electricity _________ the other ways. It is interesting to note that you can not just put them anywhere.

Obviously, the energy which is used is ______ ________ and the ____ is ________. And as the air moves past, the energy is _________ _____ the air. So, you can't put a lot of them very ______ __ ____ _____ because one will affect the work of the other.

And in fact, that's why you see they're fairly well spread out because they have to have their ____ _____ of air to work in. So that's a wind turbine; how it works and how it is ___ __.

If you see one, just think, this will be producing energy for the foreseeable future.”

✍ The blade rotates?

        ❒ slowly                        ❒ at a medium speed                        ❒ fast

✍ The electric generator rotates?

        ❒ slowly                        ❒ at a medium speed                        ❒ fast

✍ What is the purpose of the gear box?[pic 16]

✍ Here is the internal block diagram of the wind turbine.

• Fill in the two missing parts in the diagram and also the three missing links (energy)[pic 17]

✍ Why can't we implement two wind turbines very close to one another?[pic 18]

How electricity is generated?            “Deconstructed part one”

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