Download presentation
Presentation is loading. Please wait.
1
Renewable energy Learning objectives
Know the advantages and disadvantages of renewable and non-renewable energy sources. Know the main steps involved in converting an energy source into electrical energy. Be able to suggest reasonable alternative technologies for producing electricity in the local area.
2
How is electricity produced?
Whatever way we power electricity production 3 basic stages have to be gone through… energy source turbine generator Could be fossil fuels or renewable energy sources. Is what starts to turn Generates electricity Out of movement
3
How is electricity produced?
You can generate electricity simply using water to turn a wheel
4
Energy resources Renewable Non-renewable Wind Coal Solar Oil Wave
Natural gas Tidal Nuclear Hydroelectric Biomass Geothermal
5
Power stations Generator Turbine Cooling tower Transformer Boiler
6
What does each part do? The boiler is where the fuel is burnt to boil water The steam from the boiler is used to turn a turbine The turbine is connected to the generator, which acts like a dynamo – it generates electricity out of movement The steam is cooled down and turned back into water in the cooling tower
7
Other ways of generating electricity…
Wind Hydro-electric Wave Tidal
8
Stored heat energy in the Earth
Energy resources Renewable Source Wind Sun Solar Sun Wave Sun Tidal Moon Hydroelectric Sun Biomass Sun Geothermal Stored heat energy in the Earth
9
Solar energy Solar cells are expensive/cheap to make. Even though they only provide energy at low power / high power, sometimes they are the best solution to providing energy. Satellites in space use solar cells as a source of energy. Solar power stations can use concave/convex mirrors to focus energy on a boiler. This produces the steam to turn a turbine, which in turn drives a generator and then produces electricity. Solar cells contain toxic/harmless chemicals that if ‘dumped’ can poison habitats.
10
Solar power Advantages Disadvantages Renewable Unreliable – why?
No acid rain Few areas suitable No global warming Low power energy source Toxic chemicals in solar cells can damage habitats Cheap to run once built Expensive to build
11
Wind Unlike fossil fuels and solar energy, there is no need for a b____ in a wind turbine. The wind turns the turbine d_____ - no s____ is required. Wind energy is very l so you need many wind turbines to meet the same energy requirements as a fuel-burning power station. You need to find an a large a___ of land, away from settlements because of the n___, and it obviously has to be w___! oiler irectly team ow power rea oise indy
12
Low power energy source
Wind power Advantages Disadvantages Renewable Unreliable No acid rain Few areas suitable Cheap to run once built Low power energy source Noisy and unsightly No global warming Expensive to build Large area required Kills migratory birds
13
Wave The S__ produces the w___ and the wind causes w____. Waves can be used to turn t_______ directly and generate electricity. un ind aves urbines Wave energy is r________. No air pollution is produced such as sulphur dioxide or nitrogen oxides that cause acid rain. It is also cheap to run once built. enewable The problems are that it is expensive to set up. There are few areas suitable, it can kill flora and fauna and the energy you get is very l ow power
14
Tidal The M___ causes the t____. This causes the level of the sea to rise and fall. This movement of the sea can be used to turn turbines directly and generate e________. oon ides lectricity Tidal energy is r________ and non-polluting. It is cheap to run once built. enewable The problems are that it is to set up. There are few areas suitable, it can kill flora and fauna and the energy you get is very l expensive ow power
15
Biomass This is where you burn organic/inorganic matter, be it plant or animal. The reason it is classed as renewable/non-renewable is that you can reproduce this matter relatively quickly. For example, you can just grow some more plants. However you do require a large area/small area of land.
16
Geothermal Advantages? Disadvantages?
Warm water comes back up and used to turn turbines Renewable Cold water pumped down No acid rain or greenhouse effect Cheap once built Few areas suitable Expensive to build Water heated by hot rocks
17
Hydroelectricity
18
Hydroelectricity Advantages Disadvantages Renewable Destroys habitats
No acid rain Few areas suitable No global warming Unsightly Cheap to run once built Expensive to build Some systems pump water back up at night with the surplus electricity – energy efficient. Large area required
19
Renewable energy Learning outcomes
Evaluate whether renewable energies such as solar power and wind power can meet the UK’s future electricity needs, and evaluate their economic, environmental and social impact.
Similar presentations
