Wave Energy Device Types
The presentation of information on these pages is to assist the public to understand the various types of device that are in development, so that they may provide feedback to RET on the Regional Environmental Assessment. It should not be interpreted as an expression of a preference regarding a particular device type or a specific manufacturer.
Attenuator (Hinged Floating Surface Device) - This is a long floating device which is aligned perpendicular to the wave front. The device effectively rides the waves and captures the energy as the wave moves past by selectively constraining the movements along its length.
Point Absorber - Energy is absorbed in all directions by the device with power generated in one of a number of forms. This is generally a floating structure with its motion restricted by a mooring system.
An example of this type of device is the OPT Powerbuoy www.oceanpowertechnologies.com
Oscillating Wave Surge Converter - Energy is produced by wave surges and the movement of water particles oscillating an arm on a mounted pivot joint. These are generally bottom mounted devices.
Oscillating Water Column (OWC) - Water pressure is used to drive air through turbines. The device is partially submerged with an open “collector” below the water surface allowing water moved by waves to enter and exit the device. This wave action moves the air through a turbine in both directions through changing pressure. The turbine generally rotates with air flowing both ways and the rotation of the turbine is used to generate power.
Overtopping Devices - Water is directed from waves into a reservoir, sometimes with collectors to concentrate the wave energy, above sea level. The water is then returned to the sea through turbines beneath the reservoir, driving the turbine to generate power.
An example of this type of device is the WaveDragon device www.wavedragon.net
Submerged Pressure Differential - The motion of the waves causes the sea level to rise and fall above the device therefore causing pressure changes. The device responds to the alternating pressure to pump fluid through a system to generate electricity. They are typically located near shore attached to the seabed.
As with tidal, other device manufacturers exist at various stages of development including:
For a full list of wave device developers click here
- 01/08/2016 - Congratulations to Bouke Wiersma on completion of his Public Engagement PhD in Guernsey
- 21/07/2016 - Working with Universities – Update
- 01/05/2016 - Renewable energy work under new Committee
- 19/04/2016 - RET open Day at Beau Sejour
- Commerce and Employment Renewable Energy Team to undertake Open Day and associated Poster Display
- 01/01/16 - RET releases 2016 strategy and review of 2015
- 23/11/15 - Consultants Appointed for Offshore Wind Work
- November 12th & 13th - University of Exeter Festival of Social Science: Visualising public engagement with marine renewable energies
- 30/10/15 - Renewable Energy Legislation Passed
- 14/10/15 CIMREG Officers Meeting Held in Guernsey
- 08/09/2015 - Commerce and Employment and Guernsey Electricity Limited continue feasibility work into local offshore wind energy project
- 01/08/2015 - RET Continue to Work with Universities
- 30/06/2015 - Results from Island Wide Survey on Offshore Renewable Energy Shows Strong Support for Renewables
- 18/06/2015 - RET release renewable energy ordinance response document
- 20/05/2015 - Thetis EMR conference
- 21/04/2015 - Channel Islands Marine Renewable Energy Group Political Summit
- 28/01/2015 - Public Engagement PhD - Guernsey Opinion Survey: Renewable Energy
- 21/01/2015 - Consultation on Renewable Energy Ordinance Closes
- 30/11/2014 - Public Engagement PhD completes second of three studies
- 19/11/2014 - RET Release Updated Strategy and Review of 2014