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OYSTER WAVE ENERGY CONVERTER

1

Presentation by:I.Varun KumarS.Anil KumarCH.Purna Chandar3rd year,GMRIT, rajam

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1. In response to the need to find additional sources of

renewable energy to combat climate change, ensure domestic

energy security.

2. To develop new industries a large community of wave

energy researchers and commercial device developers has

arisen in recent years.

3. A company named, Aquamarine Power Ltd. had invented its

new model of wave energy converter and named it as Oyster.

2

Introduction

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mWhat is an Oyster?

• Oyster wave energy converter is a device which captures

energy in nearshore waves and converts it into clean

sustainable electricity.

• Essentially, Oyster is a wave-powered pump which pushes

high pressure water to drive an onshore hydro-electric turbine

3March 22, 2015

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mConstruction

• Oyster is made up of a Power Connector Frame (PCF) and a

Power Capture Unit (PCU).

• PCF is bolted to the seabed by 1/4 meter concrete piles that are

drilled to the seabed at a depths of between 10 and 15 meters,

around half a kilometer from the shore.

• The PCF requires careful and accurate positioning and leveling

to compensate for the uneven, rocky seabed.

4March 22, 2015

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• The PCU is a 200-ton, 18-by-12-by-4 meter buoyant flap that

is hinged to the PCF.

• Two hydraulic pistons are fixed to PCU & PCF.

• There will be an hydro-electric water turbine on the onshore.

• The turbine is coupled to a generator.

5March 22, 2015

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mMain Components

• Power Connector Frame (PCF)

• Power Capture Unit (PCU)

• Water turbine

• Generator

• Hydraulic piston

6March 22, 2015

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mSite layout

7March 22, 2015

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mWorking

• Wave power is generated by wind blowing over the surface of

the ocean far out at sea. The action of the wind transmits

energy into waves.

• Oyster's hinged flap, which is almost entirely underwater,

sways back and forth due to the movement of nearshore

waves.

• This movement of the flap drives two hydraulic pistons.

8March 22, 2015

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• The hydraulic pistons pumps high pressure water onshore via

a subsea pipeline to drive a conventional hydro-electric

turbine.

• The turbine then drives an electrical generator, which converts

the wave energy into electricity.

• The water exhausted from the turbine returned back to the sea.

9March 22, 2015

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10March 22, 2015

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11March 22, 2015

Advantages• The ocean is a huge resource, and harnessing the energy in

ocean waves represent an important step towards meeting renewable energy targets.

• The Carbon Trust estimates that each Oyster device can avoid over 500 tons of carbon dioxide from being released into the atmosphere annually.

• Because all of Oyster’s electrical components are located onshore, the hydro-electric generator is accessible for maintenance 24/7.

• The actual Oyster device is near shore, making it easily accessible, as well.

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mFuture Extension

• In the future, subsea pipelines will connect multiple Oyster

wave energy devices to a single onshore plant.

• Ultimately Oyster will be installed in wave farms of several

hundred connected devices generating hundreds of megawatts

of electricity.

12March 22, 2015

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mconclusion

13March 22, 2015

• The potential for generating electricity from wave energy is considerable.

• The device has a number of positive characteristics that make it viable for scaling up to a farm production generating MW’s of wave power.

• The Oyster WEC has been successfully designed and constructed over the last two years.

• There is an ongoing programme of testing before the installation

and operation of the Oyster WEC next summer

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ANY QUERIES?

14March 22, 2015

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Thank you…

15March 22, 2015