Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
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 Fossil Fuels 1 m 11 s 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 Burning coal 0 m 20 s Coal fired power station How a turbine works 0 m 40 s Using Energy The electricity made by the turbines is sent round the country through the National Grid. Coal fired power station How a condenser works 1m0s Coal fired power station Turbine Generator Coal powder Boiler Condenser 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 Nuclear power 2 m 10 s Nuclear power station Steam Control rods Fuel rods Turbine 1 min Nuclear power station Chain reaction 0 m 20 s Wind power Wind Wind turns propellers To drive generators Wind power There are strong winds in many places around the World Wind power Wind power 0 m 36 s Wind power Some designs use propellers and some use wing designs Vertical axis Horizontal axis Wind power Environmental impact 1 m 10 s Hydroelectric power Hydroelectric Water in a high lake Rushes down a pipe Turning a turbine To drive generators Hydroelectric power station Hydroelectric power 1 m 44 s Hydroelectric power station Environmental impact 1m0s 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 Biogas engine 1 m 10 s Tidal power TIDAL Sea water rushing in Spins turbines To drive generators Tidal power Tides 0 m 25 s 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 The cause of waves 0 m 12 s Wave power Waves make Salter’s Ducks or Clams bob up and down turning generators Wave power Water waves pressurise air to turn turbines Wave power 0 m 15 s 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 ?