Paddy and Zack’s Wave Power Slide Show How waves can be used to make electricity
This is how electricity is often made <ul><li>1.People mine coal </li></ul>2.The coal is delivered to power plants. 3.The coal burns to heat the water to make hot air called steam . 4.Inside a generator a big fan called a turbine spins and produces electricity!
BUT… <ul><li>“ Coal is an extremely dirty source of power, and imposes huge costs on people’s health, the environment and the economy," said Keith Allott, head of WWF-UK’s climate change programme. </li></ul>
But what else can we use to make electricity? <ul><li>Water </li></ul><ul><li>Solar </li></ul><ul><li>Dams </li></ul><ul><li>? Wave power! </li></ul>
Look at the power of this wave! All over the world, waves crash agasint beaches, eroding rocks and cliffs. If we could harness the power of the waves, we could stop global warming.
FINALLY… <ul><li>A team of UK engineers think they've got the answer. </li></ul><ul><li>They've invented an innovative way to capture wave energy and generate clean, green electricity - the 'Oyster' energy converter. Oyster looks set to be more eco-friendly and efficient to run than any other wave power system currently out there. </li></ul>
This is how a wave machine works: <ul><li>Oyster's design is unique. Fixed to the seabed near the shore, the device swings back and forth with each wave. This motion pumps high-pressure water to an onshore hydroelectric plant, where it drives a water turbine to generate electricity. </li></ul>
And there is tidal power… Only around 20 sites in the world have been identified as possible tidal power stations. Biomass: Wood was once our main fuel. We burned it to heat our homes and cook our food. Wood still provides a small percentage of the energy we use, but its importance as an energy source is dwindling. Sugar cane is grown in some areas, and can be fermented to make alcohol, which can be burned to generate power. Alternatively, the cane can be crushed and the pulp (called "bagasse") can be burned, to make steam to drive turbines. Other solid wastes, can be burned to provide heat, or used to make steam for a power station. "Bioconversion" uses plant and animal wastes to produce fuels such as methanol, natural gas, and oil. We can use rubbish, animal manure, woodchips, seaweed, corn stalks and other wastes.
More wave power……. <ul><li>Ocean waves are caused by the wind as it blows across the sea. Waves are a powerful source of energy. The problem is that it's not easy to harness this energy and convert it into electricity in large amounts. Thus, wave power stations are rare. </li></ul><ul><li>How it works </li></ul><ul><li>There are several methods of getting energy from waves, but one of the most effective works like a swimming pool wave machine in reverse. </li></ul><ul><li>At a swimming pool, air is blown in and out of a chamber beside the pool, which makes the water outside bob up and down, causing waves. </li></ul><ul><li>At a wave power station, the waves arriving cause the water in the chamber to rise and fall, which means that air is forced in and out of the hole in the top of the chamber. </li></ul><ul><li> </li></ul><ul><li>We place a turbine in this hole, which is turned by the air rushing in and out. The turbine turns a generator. </li></ul><ul><li>A problem with this design is that the rushing air can be very noisy, unless a silencer is fitted to the turbine. The noise is not a huge problem anyway, as the waves make quite a bit of noise themselves. </li></ul>