1. Generating Electricity 8
3.2 The advantages and disadvantages of using renewable energy technologies for generating electricity on a national scale using secondary information
3.2 b The advantages and disadvantages of using non-renewable energy technologies for generating electricity
3.2 h Efficiency, reliability, carbon footprint and output to compare different types of power station in the UK including those fuelled by fossil fuel and renewable sources of energy

2. Starter – Gas power station
How many joules in a MJ?
How much energy is wasted in total?
How much energy is supplied to the national grid?
How efficient is this power station?
What are the advantages of using gas rather than using coal as a fuel?
What are the advantages of using coal rather than gas?
Coal power
20 MJ lost as heat energy driving the turbines
16MJ lost as heat energy in the moving parts in the power station
120 MJ input from burning gas
Electrical energy to the national grid
Gas power
50 MJ lost as heat energ in the water used for cooling

3. Why do we use a range of resources to provide electricity for our homes?

4. Aberthaw power station will need replacing in 2020
Aberthaw B can generate up to MW. So the new system will need to generate the same power.
It will need to reduce its carbon footprint from 22.5 million tonnes a year
It will need to lower its impact.
It is by the sea.
Would you recommend any of your sources as part of the solution?

5. Plenary
Look back at your concept map and add in new links using a different coloured pen.