RENEWABLE ENERGY

SOURCES

HYDRO-ELECTRIC WAVE ENERGYBY

S.SINGARAVELAN&EEE DEPARTMENTFINALYEARMKCE

OYSTER

Aquamarine Power is a technology company that has developed a product called Oyster which produces electricity from ocean wave energy

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

BLOCK DIAGRAM

OYSTER DESIGN OVERVIEW

Hydraulic to Mechanical (WEC Flap)

Mechanical to Hydraulic (Pistons)

Hydraulic to Mechanical(Pelton Wheel)

Mechanical to Electrical (Generator)

OYSTER DESIN OVERVIEW

HYDAULIC TO MECHANICAL

The 36-ton a buoyant, hinged WEC flap which is attached to the seabed

The WEC flap is almost submerged

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

HINGED WEC FLAP

MECHANICAL TO HYDRAULIC The double-acting hydraulic cylinders produce

high pressurized water

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.

HYDRAULIC FLOW

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

POWER TRANSMISSION TO SHORE

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.

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

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

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

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..,

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