1. If you were going to design a power station what essential parts would it need and why?

2. Half-term H.Wk
Research a power station of your choice and produce a fact file on its operation.
Your fact file might include:
The type and amount of fuel used,
How much energy the power station produces
How many homes can it power?
When and where was it built
How long will it last? Why only this long?

3. By the end of this lesson you should…
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources

4. Path of energy from Power Station to Home

5. The turbine turns magnets in the generator.
Power Stations
For your notes…
Organise the statements to explain how electricity is generated, add a sketch too!
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
The turbine turns magnets in the generator.
in the stationary coils of
This induces a voltage
Steam is produced.
Ek from steam turns a turbine.
the generator of about 25kV
Fuel is burnt.

6. Sketch the diagram and add the type of energy at each point

7. Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources
Generator
Crucial part of any power station. Part in which the kinetic energy from the turbine is transferred into electrical energy in a generator.
A generator creates a voltage/current in a wire due to a changing magnetic field
Also called electromagnetic induction

8. and generates an electric current
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources
Moving wires…
A conducting wire which is not carrying any current moves through a stationary magnetic field
and generates an electric current

9. Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources
Moving magnets…
A magnet moves through stationary conductor e.g. a coil
and generates an electric current

10. Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources
The signal generated by the generator is an AC signal which varies in strength and direction
The frequency of an AC signal is the number of cycles per second.
(Unit = Hertz, Hz)

11. Where might energy be wasted in this system?

12. Modelling energy loss in the system

13. Efficiency = Electrical Energy Output Fuel Energy Input
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise that there is significant waste of energy in a conventional power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the advantages and disadvantages of different energy sources
Efficiency = Electrical Energy Output Fuel Energy Input
A power station burns coal containing 200MJ of energy every second. It transforms this chemical energy into heat, then kinetic energy and then electrical energy. The amount of electrical energy leaving the power station into the National Grid is 72,000,000J every second.
How efficient is our power station and how much energy is wasted?

14. What fuel do we use in power stations?
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
What fuel do we use in power stations?
Fossil fuels
coal
oil
natural gas
What other fuels can we use?

15. Biomass – manure, straw and wood
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
Biomass – manure, straw and wood

16. Nuclear – uranium and plutonium
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
Nuclear – uranium and plutonium

17. What are the pros and cons
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
What are the pros and cons
of each resource?

18. Technology already established
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
Fossil fuel
Technology already established
Concentrated source of energy
Non-renewable and running out
Causes acid rain
Produce CO2 which leads to global warming
Mostly imported from other countries
Biomass
Uses waste products that need disposing of
Carbon neutral
Available in the UK
Produce CO2
A lot of biomass needed to replace one lump of coal

19. Highly concentrated source of energy
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
Nuclear
Highly concentrated source of energy
There are high fuel stocks in the UK
Does not produce greenhouse gases
Independent of fossil fuels
Uses advanced technology
Non-renewable
Pollution from fuel reprocessing
High maintenance and decommissioning costs
Risk of accidental emissions from radioactive material
Risk of major catastrophe
Difficult and dangerous to dispose of waste

20. Write your answer and a short explanation then stick it on the board.
Learning Objectives
By the end of this lesson you should…
Be able to describe how electricity is generated at a conventional power station
Recognise where there is waste of energy in a power station
Be able to apply the efficiency formula in the context of a power station
Be able to describe and evaluate the pros and cons of different energy sources
Which of the fuels we have looked at will best suit Britain for future years?
Write your answer and a short explanation then stick it on the board.
This is a judgment not a fact!