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Wave Power

The Oyster wave energy device was launched this week by Scotland's First Minister Alex Sal...

Rounding off a big week in renewable energy is news that the world’s largest working hydro-electric wave energy device has been officially launched in Scotland. Known as Oyster, the device, stationed at the European Marine Energy Center (EMEC) Billia Croo site near Stromness, was installed this year and is, at present, the world’s only hydro-electric wave energy device which is producing power.  Read More

Oyster® wave energy conversion system

A new milestone for marine energy was achieved recently when UK based Wave and Tidal Technologies company Aquamarine Power Ltd signed a 1,000 MW (1 GW) Development Agreement with the renewable energy development division of Scottish and Southern Energy, Airtricity. Aquamarimes's Wave Power device, called Oyster, is a near shore hydroelectric wave power system. Still at the full scale prototype stage, the Oyster is based around a large movable buoyant barrier structure that is mounted on the seabed in depths of 10 – 12 m (33 – 40 ft) and pivots like a gate.  Read More

Oceanlinx wave energy conversion unit at Port Kembla in Australia

Renewable Energy Company Oceanlinx has re-deployed its full-scale wave energy conversion unit at Port Kembla in Australia. First deployed in 2005, the unit has been undergoing planned refurbishment and modifications for the past several months. The Oceanlinx wave generator, which is an Oscillating Water Column (OWC) device capable of generating peak power outputs of between 100 Kw and 1.5 MW, is one of six installations around the world currently being trialed.  Read More

Green Ocean Energy's Wave Treader

Bringing together the benefits of two eco-friendly forms of power generation, Scottish company Green Ocean Energy has developed a wave power machine that attaches to an offshore wind turbine. The system, known as the Wave Treader, comprises two 20 m (66ft) long floats molded from GRP (Glass Reinforced Plastic) at ocean level attached to a wind turbine tower by 50 m (165 ft) long pivoting beams. As the floats move up and down in response to constant wave action, the arms move hydraulic cylinders attached to the beams by levers, which in turn spins a hydraulic motor connected directly to an electric generator.  Read More

The Agucadoura wave farm

The world’s first commercial wave farm in Portugal is now operational. Three 750kW Pelamis Wave Energy Converters (PWEC) have been installed in the first stage of a project which, when complete, will provide enough clean energy to meet the needs of 15,000 households.  Read More

The Anaconda device could be used in groups of 20 or more

A giant rubber tube known as the “Anaconda” may present an viable solution to the challenge of generating electricity from the power of ocean waves. Under development in the UK, the simple design means it would be cheap to manufacture and maintain, resulting in clean electricity at a lower cost than other types of wave based energy production.  Read More

Bourne Energy's RiverStar

March 5, 2008 Hydroelectric dams produce little-to-no emissions and draw energy from a renewable resource, but they are still plagued with the inherent problems of all large-scale power plants: they’re costly to build and maintain, land intensive, and have negative environmental consequences. That’s why Bourne Energy believes the future of hydropower, and the solution to global energy demand, is in small generators that harness power from river currents. The company's RiverStar power modules collect kinetic energy by passing the water through low RPM turbines that don’t harm aquaculture. The units can be cheaply mass-produced, and require no construction on river bottoms, allowing them to be installed quickly and inexpensively even in areas inhospitable to development.  Read More

The world’s first commercial wave farm

March 10, 2007 Look at reports such as the Electric Power Research Institute’s Electricity Technology in a Carbon-Constrained Future (February 2007)and the Role of Renewable Energy in Future Electricity Supply (July 30, 2006) and you’ll see we all face some common problems – Planet Earth is showing signs of toxic shock, we need energy and we have yet to solve our reliance on emission-producing energy sources. Those same reports don’t see ocean power playing much of a role in the foreseeable future, but as the game plays itself out, new technologies for harvesting the power of the ocean is emerging. Already, claim its proponents, the costs of producing electricity from wind energy have fallen by 80% over the past two decades as a result of volume and production optimisation. With opening costs around half wind energy’s opening costs and a quarter the current cost of solar, a new form of wave energy harvester has the potential to become one of the lowest cost forms of generation in the longer term. The Pelamis is a semi-submerged structure composed of cylindrical sections linked by hinged joints. The wave-induced motion of these joints is resisted by hydraulic rams. These pump oil through hydraulic motors which drive generators to produce electricity. Power from all the joints is fed down a single umbilical cable to a junction on the sea bed. Several devices can be connected together and linked to shore through a single seabed cable.  Read More

Energetech’s wave energy technology

April 12, 2005 The power of ocean waves has long been recognised as one of the great untapped energy resources with more than 1,000 patents filed for technologies to harness that energy in the last two hundred years and none that have yet reached commercial realisation. When that goal is reached, it will be a day worth celebrating as the World Energy Council believes that enough energy could be extracted from waves to meet the world's entire electrical energy needs. One company on the verge of commercialisation of wavepower-derived energy is Australian company Energetech. Energetech Australia is working on a new and commercially efficient system for extracting energy from ocean waves and converting it to electricity as a cheap, sustainable source of power. The company has a pilot installation in Port Kembla, NSW and has just received an investment of AUD$500,000 from the Centre for Energy and Greenhouse Technologies (CEGT) for the deployment of the first commercial wave energy converter off the Victorian coast.  Read More

Wave powered machine produced drinkable water and electricity

A prototype technology which uses wave power to generate electricity and desalinise water is in the advanced stages of completion on the WA coast. The Seapower Pacific unit to be deployed off Fremantle should begin operating later this year. Desalination of the seawater is achieved using a reverse-osmosis process, passing sea water through a membrane to remove the salt. The process is powered by wave motions, with excess energy available to drive electricity-generating turbines. The saline-free water can be discharged and de-pressurised for domestic or industrial use.  Read More

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