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RENEWABLE ENERGY
SOURCES
HYDRO-ELECTRIC WAVE ENERGYBY
S.SINGARAVELAN&EEE DEPARTMENTFINALYEARMKCE
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OYSTER
Aquamarine Power is a technology company that has developed a product called Oyster which produces electricity from ocean wave energy
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INTRODUCTION Aquamarine Power installed Oyster at the EMEC It is the world’s largest working hydro-electric
wave energy device has been officially launched in Scotland, Known as oyster(40MW)
The previous world’s largest hydro-electric wave energy is located in u.k(2.4MW)
The Oyster concept is an oscillating wave surge converter
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BLOCK DIAGRAM
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OYSTER DESIGN OVERVIEW
Hydraulic to Mechanical (WEC Flap)
Mechanical to Hydraulic (Pistons)
Hydraulic to Mechanical(Pelton Wheel)
Mechanical to Electrical (Generator)
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OYSTER DESIN OVERVIEW
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HYDAULIC TO MECHANICAL
The 36-ton a buoyant, hinged WEC flap which is attached to the seabed
The WEC flap is almost submerged
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CONT.., Moves
backwards and forwards along with the direction of wave
The damping torque is produced by the movement of flap is used to drives two hydraulic pistons
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HINGED WEC FLAP
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MECHANICAL TO HYDRAULIC The double-acting hydraulic cylinders produce
high pressurized water
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CONT.., High pressure water is transmitted to the onshore
hydroelectric plant through conventional
directionally drilled pipelines
The array of offshore devices would subsequently
be working at a common pressure, however high
efficiencies of power capture.
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HYDRAULIC FLOW
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HYDRAULIC TO MECHANICAL The high pressurized water
from the hydraulic piston
is pass over the turbine
Generally we use the
pelton wheel as turbine
because it operates most
efficiently when running at
a constant speed
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POWER TRANSMISSION TO SHORE
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MECHANICAL TO ELECTRICAL Variable speed
induction generator coupled on a shaft with a Pelton wheel turbine and a flywheel.
The generator rotates when the peloton wheel is driven by pressurized water.
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CONT.., The electrical energy
generated is stepped up to 33KV with the help of step-up transformer
Then the electrical energy generated is connected to grid with the help of transmission line
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SPECIFICATIONS OF OYSTER Water Depth -12–16 m Flap Width - 26 m Flap Depth -13 m Total Weight -About 450 tons Power Conversion -Water hydraulics Generator -3-phase induction
generator Converter -Step-up transformer/11-33KV Power Output -800 Kw
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MAINTENANCE
It is estimated that the lifetime of the Oyster
device is 15 year
It needs a regular maintenance will be required
in order to ensure efficient operation
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ADVANTAGE
High capture efficiency Operates even in storm conditions Keeps electricity out of the water Minimal ecological impact on marine environment Easy to access Reliable proven hydro-electric plant Etc..,
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CONCLUSION Oyster will turn out to be the most
efficient. It can make ocean power designs could help us to ride the wave into the future of energy
It has potential to provide the sufficient of world energy needs
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