WAVES AND TIDAL ENERGY

WHAT IS IT?

• A power from the moon and suns gravitational pull
• Height differences create tidal currents in coastal areas
• The coastal currents from these height differences can be strong enough to make turbans move

WHERE IS IT USED

• Tidal energy is new so there isn't many places where its used
• Most of the places where is used is for experimental purpuses
• La Rance tidal power station was the first large scale energy project
• It opened in 1996 it is used in north western france
• It has 24 turbans

TIDAL BARRAGE ENERGY

• It consists of three main parts
• Barrage holding water back during high tide
• Sluice gate that lets water through the third part
• The turban and generater resulting in electricity generation
• Sluice gates are left open during high tide and closed during low tide

TIDAL STREAM GENERATOR

• They are very similar to wind turnbans except they are under water
• The turban generator coverts the movement of water from the change in tide
• Kenetic energy into electricity
• Water 830 times more dense than air so it generates electricity at lower speeds than air

DYNAMIC TIDAL POWER

• It is still in a development stage
• Theory is to exploit tidal flows
• And the interaction between potential and kinetic energy

ADVANTAGES OF TIDAL ENERGY

• Renewable and a green source
• The density of water is 1000 times greater than air
• Results in large amounts of energy
• Predicable, easy for planning and maintenence

DRAWBACKS OF TIDAL POWER

• Can only generate when..
• The tide if flowing in or out.
• Only 10 hours each day

PLANS FOR SEVERN BARRAGE

• Every now and then it gets talked about
• No one has built anything
• It would cost at least £15 billion to build
• Provide 8,000 megawatts thats over 12 nuclear power stations
• Some say its only equivalent to 3 nuclear power stations

TIDAL ENERGY

• Produced by the surge of ocean water
• Renewable source
• The amount of energy has been small so far
• The united states has no tidal plants
• United states has legal concers about underwater ownership

TIDAL LAGOON

• Water inclosed by a natural barrier
• You could fill it with water
• Continues energy
• Turbans would work when the lagoon is filling or emptying

Untitled Slide

Untitled Slide

Untitled Slide