ENERGY RESOURCES
Why is there an energy problem ?
Waste heat All the countries in the world use lots of energy We are running out of some sources of fuel
Using Energy Extra carbon dioxide in the atmosphere is causing global warming. Sulphur dioxide is causing acid rain
Waste heat We waste too much energy from our houses We should make our houses better
Coal fired power stations
Coal Coal is burnt To boil water To make steam To spin turbines To drive generators
Coal fired power station 1 m 11 s Fossil Fuels
Coal The remains of trees that fell into swampy forests millions of years ago Mainly carbon found in seams compressed by the rocks above
Coal fired power station 0 m 20 s Burning coal
Coal fired power station 0 m 40 s How a turbine works
Using Energy The electricity made by the turbines is sent round the country through the National Grid.
Coal fired power station 1 m 0 s How a condenser works
Coal fired power station Condenser Turbine Coal powder Boiler Generator 1 m 20s
Nuclear power stations
Nuclear Atoms are split To boil water To make steam To spin turbines To drive generators
Nuclear power station 2 m 10 s Nuclear power
Nuclear power station Control rodsTurbine Steam Fuel rods 1 min
Nuclear power station 0 m 20 s Chain reaction
Wind power
Wind Wind turns propellers To drive generators
Wind power There are strong winds in many places around the World
Wind power 0 m 36 s Wind power
Some designs use propellers and some use wing designs Horizontal axis Vertical axis
Wind power 1 m 10 s Environmental impact
Hydroelectric power
Hydroelectric Water in a high lake Rushes down a pipe Turning a turbine To drive generators
Hydroelectric power station 1 m 44 s Hydroelectric power
Hydroelectric power station 1 m 0 s Environmental impact
Biomass
BIOMASS Biological material burns To boil water To make steam To spin turbines To drive generators
Biomass – Biological matter that can be burnt Chicken droppings Cow slurry Biomass power stations
Biomass engine 1 m 10 s Biogas engine
Tidal power
TIDAL Sea water rushing in Spins turbines To drive generators
Tidal power 0 m 25 s Tides
Tidal power The tide pushes past turbine – generators as it fills and then empties an estuary It has been suggested that the Bristol Channel might be a good place for this
Wave power
WAVE Wave movement Spins turbines To drive generators
Wave power 0 m 12 s The cause of waves
Wave power Waves make Salter’s Ducks or Clams bob up and down turning generators
Wave power Water waves pressurise air to turn turbines 0 m 15 s Wave power
Oil and gas
OIL and GAS Oil and gas are burnt To boil water To make steam To spin turbines To drive generators
Oil and gas They are formed from tiny creatures that lived in the sea millions of years ago. Both are found under anticlines (domed shaped rocks) which are impermeable (do not let fluids through)
Solar
SOLAR CELLS AND PANNELS Heat and light from the Sun Either heats water Or makes electricity
Solar Cells Turn light into electricity but it is not very efficient and cells expensive to make
How do the different methods compare ?