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Published byCharla Muriel Nelson Modified over 9 years ago
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WHAT IS IT? It is a type of energy that takes advantage of the energy of the tides. There uses the difference of height between the tide and the low tide.
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It is a renewable energy, that is to say, a type of energy that takes advantage of resources that do not end, in this case, the water
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Tides The tides are periodic changes of the level of the sea that are different depending on the zones.
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The tides are produced by the attractive force of the Moon and, in minor measure, of the Sun. When in a place there is high tide, in other one there is low tide
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When the Sun and the moon attract in the same direction the alive tides are produced. If they attract in opposite directions, dead tides are produced
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In order that this energy works out profitable it is necessary that the difference between tides is major of 5 meters. Therefore only it is possible to install plants in a few places.
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The tidal power stations must place in zones closed as the estuary of a river. Estuary of the river Adige (Italy) The Guadalquivir
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A plant consists of: Turbine Pelton Francis A turbine "bulb" with arms or blades A bun - a camera of entry of the water - a pipe of aspiration
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11. When the tide rises, the hatches of the plant are opened to allow the step.
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22. The deposit is closed creating a prey with the water dammed in its interior.
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3. When the tide is in its point more low the hatches are opened to allow the step of the water along the turbines.
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4. The turbines move the blades that, together with the alternator, produce alternating current.
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Tidal power station of the river The Rance It is the only tidal power station with energetic purposes of the world. Others only are used by scientific purposes.
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IIt is in the river mouth of the river The Rance, in the north of France. It is formed by 24 generators. It has a power of 240 MW
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The dike has 700 m of length and 15 of height. It produces 600 millions of kwh annual, the sufficient ones as to supply 330000 persons.
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Other tidal power stations are: Annapolis Royal in Canada Murmansk in Russia
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It neither emits any pollutant nor emits any dangerous residue It is a renewable energy. The cost of maintenance is low.
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Its cost is very high. The production of energy lasts only a few hours. It produces a great environmental impact.
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TThe wave energy is a clean energy, which takes advantage of the difference between tides and which does not produce pollutants but which is very expensive its construction, only one can in a few zones of the planet and that generates a great environmental impact.
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