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Author Topic: Wave Power  (Read 133 times)

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Wave Power
« on: February 15, 2014, 02:25:37 pm »
Lockheed Martin Cranks Up World’s Largest Wave Energy Project
Lockheed Martin, best known for its military aircraft and other cutting edge airborne machinery, is switching gears in a big way. The company has signed on with Victorian Wave Partners Ltd. to engineer a 62.5 MW ocean power project off the coast of Australia, billed as the world’s largest wave energy project.

The new project will feature a little gizmo we’ve been following for several years now, the PowerBuoy® wave-powered electricity generator developed by a company called Ocean Power Technologies (OPT).

So, let’s see what these guys have been up to since we last checked in.

PowerBuoy wave energy generator courtesy of Ocean Power Technologies.

The World’s Largest Wave Energy Project – We Built This!

Victorian Wave Partners was formed by OPT’s special-purpose company, OPT Australasia Pty Ltd., to develop the project. Lockheed Martin will leverage its experience at the manufacturing end to get the PowerBuoy components into production and integrate the wave energy converters.

We first took note of OPT back in 2010, when its small scale PowerBuoy became the first ever grid-connected wave energy system in the US.

The hookup took place at a shared wave energy test bed developed by the US Navy in Kaneohe Bay at Marine Corps Base Hawaii, in Oahu, where wave energy experiments have been going on since 2003.

If you’re doing the math at home, yes, the test bed goes all the way back to the Bush Administration, partnering the US Navy with the Hawaii National Marine Renewable Energy Center.

Scaling Up Wave Energy

The concept behind the PowerBuoy is relatively simple. The shell of the PowerBuoy is literally a buoy that bobs up and down on the waves. That produces a mechanical stroking motion, which is transferred to a converter called a “take-off unit,” which powers an on-board generator. Electricity from the generator is conveyed to shore by cable.

That’s all well and good but the next challenge is to scale up the mechanism into a useful size while maximizing efficiency, and developing a cost-effective manufacturing stream.

By 2012, the Navy was expanding and enhancing its wave energy facility, and OPT developed a utility-scale version of the device.

Aside from scaling up the design, one key efficiency improvement was the switch from a hydraulic drive take-off unit to a direct drive unit.

The device is also tunable on a wave-to-wave basis, meaning that it adjusts to squeeze the most electricity out of each individual wave.

For extra bonus points, the PowerBuoy only rises about 30 feet off the surface of the water, with the bulk of its guts resting below. That low height, relative to offshore wind turbines, could give wave energy an edge on site selection where aesthetic concerns come into play.

Although the Australia project is expected to be the world’s largest of its kind (according to OPT, there’s a potential for 100 MW), let’s note for the record that OPT also has been testing the Powebuoy off Scotland since 2011, and it is in the process of commissioning another one off the coast of Oregon.

As for Lockheed Martin, expect more of the unexpected from this aeronautics firm. As part of a move to rebrand itself as climate-focused, “smart energy” company, Lockheed Martin also recently partnered with Concord Blue Energy to commercialize that company’s high tech waste-to-energy process in global markets.

Read more at http://cleantechnica.com/2014/02/15/worlds-largest-wave-energy-project-set-for-australian-coast/#Q7R7maT7HmyBeIFZ.99

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if it has not works, is dead, being alone.


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Re: Wave Power
« Reply #1 on: July 11, 2016, 06:19:47 pm »
Graphic of WaveRollers in action

Alternative Ocean Power Moves Closer to ‘Bankability’

July 10, 2016 by John Konrad

The first 3×100 kW WaveRoller pilot power plant built in 2012

By Brian Parkin (Bloomberg)

The two-century old dream of harnessing the power of the sea came closer to commercial reality after the European Investment Bank backed a Finnish company with ambitions to deploy machines that generate electricity in six countries.

AW-Energy Oy, which also has the support of the nation’s biggest utility, Fortum Oyj, said it expects its could sell as many as 300 megawatts of its WaveRollers in the coming years. The EIB on Wednesday invested 10 million euros ($11 million) in the company to spur the commercialization of the technology.

Power generated from ocean waves has captured scientific attention since at least 1799, when the first patents were filed in France. While scores of demonstration projects have tried harnessing the sea’s energy, the technology hasn’t yet caught on at a utility scale because of its expense and technical difficulty. AW-Energy says its machine using a hinged panel fixed to the seabed is ready for widespread use.

“The tech is commercially mature,”
Chief Executive Officer John Liljelund said in a phone interview from Brussels, adding that the machine is due to receive a safety certificate from Lloyd’s Register this month, increasing its “bankability.”

If it works at a big scale, wave power would generate huge amounts of electricity without producing greenhouse gases. In 2012, researchers at the German utility EON SE estimated 2.1 terawatts of could be captured along global coastlines:o  ;D

WaveRoller is one of several coastal-power technologies seeking a broader commercial footing. DCNS SA, the French warship maker, in 2013 agreed to collaborate with Ocean Thermal Energy Plc on generating power using differences in sea temperature. Sweden’s Seabased AB is selling a different near-shore technology based on floating buoys. Britain and France are working on tidal lagoons that generate power.

For now, the machines being installed are small. AW-Energy is about to start a 350-kilowatt unit off the Portuguese coast, near Peniche, which will form the basis of a 5.6 megawatt undersea power park using 16 WaveRollers, Liljelund said.

Its objective is to sell more than 50 units in the next four years. It has plans to install power generators anchored on the seabeds of six countries.      

Under development for almost a quarter century, the WaveRoller was inspired by a Finnish professional diver, Rauno Koivusaari, after he observed in 1993 how the power of the sea effortlessly rocked the hulk of a wrecked ship back and forth.

Tidal Surge

AW-Energy’s WaveRoller harnesses the so-called surge behavior of waves as they flatten and strengthen when approaching the shoreline.

AW-Energy is based in 22 kilometers (14 miles) northeast of Helsinki in Vantaa, Finland. Its other projects in various stages of planning or execution are located in France, Ireland, Chile, Mexico and Asia, according to the CEO.

Fortum and DCNS SA in 2013 agreed to install a 1.5 megawatt demonstration WaveRoller off the Brittany coast. Last year the company signed an agreement with Mexican clean power developer Grupo Enal to develop a 10-megawatt wave energy project off the Pacific coast.

©2016 Bloomberg News
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