Transcript Electricity production

Electricity production
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How electricity is generated.?
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Three basic elements are required to produce
electricity:
- Motion (required to rotate a turbine)
- Magnetic Field
- Conductors
A form of energy is required to rotate a turbine
which is attached to the shaft of the generator
rotor. The rotor spins through the stator producing
electricity.
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Energy Production
What types of energy production do you think is suitable here?
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Electricity from Fossil fuels
Electricity can be generated from the heat produced when fossil
fuels are burnt.
In the boiler or steam generating plant, heat from the burning
fossil fuel turns water into steam.
The steam, moving under high pressure, makes the turbine
blades and shaft spin.
The turbine is connected to the alternator, which produces
electricity.
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What do you see in the picture?
It’s a Dam, Right
What is it used for?
It is used to generate
Electricity from moving water
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Hydroelectric power - energy from falling water
What is hydro power?
Hydropower is the energy that comes from the flow of moving water.
The energy contained in running water can be turned into electricity.
How it works ?
• A dam is built to trap water, usually in a
valley where there is an existing lake.
• Water is allowed to flow through
tunnels in the dam, to turn turbines and
thus drive generators.
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Hydroelectric power - energy from falling water
• The water behind the dam flows through the intake and into a pipe
called a penstock. The water pushes against blades in a turbine, causing
them to turn.
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The turbine spins a generator to produce electricity.
20 % of world's electricity is from hydropower
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Where are hydroelectric plants likely to be found?
In mountainous countries.
Is hydroelectric power a renewable or renewable
source? Why?
Hydro-electric power is renewable.
The Sun provides the water by evaporation from
the sea, and will keep on doing so.
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Nuclear Energy
What is Nuclear Energy?
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When atoms split—or fission—they produce
large amounts of energy, which is called nuclear
energy. This energy is released in the form of
heat. As the atom fragments hit other atoms,
they also split, producing more heat. A nuclear
power plant uses this heat to produce electricity.
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How a Nuclear Power Plant Works
Nuclear power plants run on uranium fuel. In the reactor, uranium atoms are split
through a process known as fission. When atoms are spilt, they produce a large
amount of energy that is then converted to heat. The heat boils water, creating
steam that is used to turn turbines, which spins the shaft of a generator. Inside
the generator, coils of wire spin in a magnetic field and electricity is produced.
Boiling Water Reactor (BWR)
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Simulations
http://www.saskpower.com/poweringyourfuture/today/ge
neration/animation.shtml
http://yteach.co.uk/page.php/resources/view_all?id=nucl
ear_fission_neutron_reaction_energy_conventional_p
ower_engineering_reactor_t_page_8&from=search
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Example-Hydropower
Hydropower
Advantages
• Clean (no greenhouse Gas emissions after set-up)
• Dams enable irrigation and flood control.
• Hydro power output is flexible and responsive to demand.
Disadvantages
• Renewable Concern about impact of dams on environments and river
flows
• Vulnerable to variations in rainfall
• Large set up cost
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Hope you Enjoyed Learning!
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