tidal power energy renewable energy in future fan zou
TRANSCRIPT
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Tidal Power Energy Renewable Energy in Future
Fan Zou
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Tidal Power HistoryTidal Power History
One of the oldest forms of energy, tide mills in use on the Spanish, French and British coasts, date back to 787 A.D.
The first tidal power station began working in France in 1965
More and more commercial-scale tidal barrage was put in service
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Why there are tidesWhy there are tides
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Tides in physicsTides in physics
Motions of Earth, Moon and Sun Renewable resource Contains extreme amounts of potential energy Requires large tidal difference for generating power Affects environment less than other fuels and gasses Might be a solution of current energy problems
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ADVANTAGESADVANTAGES
Renewable resource, it needs no fuel to maintain, and free of charge
Little pollution, unlike fossil fuels, it produces no greenhouse gases or other waste
It will protect a large stretch of coastline against damage from high storm tides
More efficient than wind
Predictable source of energy, it is independent of weather and climate change and follows the predictable relationship of the lunar orbit
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Disadvantages Disadvantages Very expensive to build and maintain
Barrage has environmental affects Fish and plant migration
Silt and mud deposits
Waste and sewage blocks
Technology is not fully developed
Only provides power for around 10 hours each day, when the tide is actually moving in or out
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How it worksHow it works First generation, barrage-style tidal power plants
Works by building Barrage to contain water after high tide, then water has to pass through a turbine to return to low tide and generating electricity
Sites in France (La Rance), Canada (Annapolis), and Russia
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Bulb Turbine
Rim Turbine
Tubular Turbine
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Category of generation Category of generation Ebb generation
Generation occurs as the tidal ebbs
Flood generation
Generation occurs as the tidal floods
Two-way generation
Generation occurs both as the tidal ebbs and floods
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Two-basin schemes Two-basin schemes
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Second-generation tidal power plantsSecond-generation tidal power plants
Barrage not need, limiting total costsTwo types- vertical axis and horizontal axisHarness the energy of tidal streamsMore efficient because they allow for
energy production on both the ebbing and flooding tides
One site has potential to equal the generating power of 3 nuclear power plants
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Second-generation tidal power plantsSecond-generation tidal power plants
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RepresentativeRepresentative tidal projects tidal projects
La Rance (France)
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RepresentativeRepresentative tidal projects tidal projects
Annapolis Royal
(Canada)
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RepresentativeRepresentative tidal projects tidal projects Jiangxia (China)
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Conclusion & discussion Conclusion & discussion Comparing with wind power energy and solar energy, tidal
power seems not a big sustainable resource
We have to make the cost lower, so that it can be built in a large scale
Turbine has to be more effective, technology of its working process should be fully developed
We should never neglect the environment impacts of tidal power, we do need a way to solve the current problems.
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Thank you!!
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