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Presented by T.SRAVYA(KU). Presentation on TIDAL ENERGY. CONTENT:. INTRODUCTION CURRENT SITUATION WORLDWIDE DISTRIBUTION HOW IT WORKS ADVANTAGES DISADVANTAGES CONCLUSION. INTRODUCTION. Tidal energy is the energy from the sea.
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Presented by T.SRAVYA(KU) Presentation onTIDAL ENERGY
CONTENT: • INTRODUCTION • CURRENT SITUATION • WORLDWIDE DISTRIBUTION • HOW IT WORKS • ADVANTAGES • DISADVANTAGES • CONCLUSION
INTRODUCTION • Tidal energy is the energy from the sea. • A few years ago, "tidal power" meant "tidal barrage", but these days there are other options as well • The tide moves a huge amount of water twice each day • and harnessing it could provide a great deal of energy - around 20% of Britain's needs. • The energy supply is reliable and plentiful
Current situation • Tidal Energy is sustainable, clean, reliable, widely distributed, and can offer significant benefits to many marine nations. • Tidal Energy can be captured in an efficient and cost-effective way. • Tidal Energy is not yet recognized by the United Nations as an energy resource that should receive support and funding for its development.
Tidal Energy is a clean, renewable source of energy--such as solar, wind, biofuels, and low-head hydro-- and deserves official international support and funding for its development
The largest tidal power station in the world (and the only one in Europe) is in the Rance estuary in northern France, near St. Malo. It was built in 1966.
December 2008: A "Tidal Reef" across the Severn Estuary is being proposed.
Advantages • Once you've built it, tidal power is free. • It produces no greenhouse gases or other waste. • It needs no fuel. • It produces electricity reliably. • Not expensive to maintain. • Tides are totally predictable. • Offshore turbines and vertical-axis turbines are not ruinously expensive to build and do not have a large environmental impact.
Disadvantages • A barrage across an estuary is very expensive to build, and affects a very wide area • Only provides power for around 10 hours each day, when the tide is actually moving in or out. • There are few suitable sites for tidal barrages
Tidal Power is renewable • Doesn't cause pollution, doesn't need fuel • A tidal barrage is very expensive to build • Only works when tide is going in or out • A tidal barrage affects a large area • There are very few places that you could sensibly build a Tidal barrage • Underwater turbines may be a better bet than a barrage - they are cheaper and don't have the huge environmental impact