Transcript Power Generation for Wroclaw - WISIT

Power Generation for
Wroclaw
DT project by Malena, grade 7
Technologies options
• Wind power
• Coal power
• Hydro power
Electricity generation
• All technologies need a generator that turns. A
rotating generator creates electrical power
(voltage, current)
• The difference between the technologies is how
to make the generator turn.
• Electricity is sent around the country using highvoltage power lines. Nearly all of the power we
use comes from large power stations.
Wind power
• Wind power plants use the wind. Wind blows into the blades
(turbine) that start to rotate and turn the generator.
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Advantages:
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No pollution and very safe
No cost for any fuel. The wind is for free.
Rather easy and quick to install and take away
Renewable energy
Disadvantages:
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Not so powerful, many mills are needed
Rather costly to build per power generated
The wind does not blow all the time
Noisy and some people find the mills ugly
Must be built where it is windy
Coal power
• Coal powder is burned in high temperature to produce very hot
water steam. This steam is put on the blades in a turbine that drives
the generator to turn.
• Advantages
• Coal is cheap and is not scarce. A lot in Poland
• Powerful, cheap produced electricity
• Can be built almost anywhere
• Disadvantages
• Pollution
• Global warming, not renewable energy
• Expensive to take away
turbine
Hydro power
• Water in a dam is let out through a hole deep under water. Then the
pressure is strong enough to make the water turn the blades in a turbine
that drives the generator to turn.
• Advantages
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Water is free
Very powerful, cheap produced electricity
No pollution
Renewable energy
• Disadvantages
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Have to build it at waterfalls. Can be far from cities
Bad for animals and fish after the dam
Expensive and long time to build
Expensive to take away
If the dam brakes it will be a very big problem
Wroclaw needs
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Power plant: 270 MW
Energy use: 2,4 TWh
Available money: 1379 million zl
Company that can build
How fast is it needed?
Compare
Coal
Wind
Hydro
A lot
No
No
Time to build:
3 years
Less than 1 year
3 years
Cost to build:
650000000$
2275000000 Zl
22000$
77000 Zl
per mill
30000000$
105000000 Zl
Power output
500 MW
1.8 MW
102 MW
0.25 groszy
0.320222 Zl
0.335974 Zl
Pollution:
Cost to produce:
Many are
needed
Powerful:
Yes
VERY
Near Wroclaw:
Yes
Yes
So so
Risk:
A lot
NO
One
Chosen
Wind And Hydro
Because coal makes a lot of pollution and
that is bad. For Wind the fuel is free and
so for Hydro. Wind is also cheap and does
not take a long time to build but the wind
does not blow all the time. Hydro lasts for
a long time and is very powerful but takes
3 years to build.
Informations:
Wikipedia
Wikispaces
&
Pictures:
Google
Thank you for watching my
presentation,
I hope you liked it.