CleanTechnica

Wave energy seems to be Scotland’s lottery number. Scotland-based energy developer Pelamis just signed a joint venture agreement with the European energy giant Vattenfall for a large, almost $100 million energy project off Scotland’s Shetland Islands. This follows the recent launch of Oyster, reportedly the largest working hydro-electric wave energy device in the world, by the Scottish government and partners.

This new project by Pelamis and Vattenfall is being named Aegir, named after a Norse mythological sea god. It is Scotland’s largest wave power scheme.
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The largest working hydro-electric wave energy device was launched by Queen’s University Belfast, Aquamarine Power Ltd. and the Scottish government recently, bringing the global wave energy industry one major move forward.

The device is called Oyster. It is the only hydro-electric wave energy device producing power in the world, according to Queens University Belfast.

How does it work?

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The oceans seem like a great potential source for clean energy. The force of the waves, the constancy, the size of the oceans — it all seems like something that could produce energy for humans without much harm. (I still have some concerns, though it seems like one of the best options these days). Some of the major problems with utilizing the force of the oceans, however, have been how to survive storms, the need to be anchored to the see floor, and efficiency.

Researchers from the US Air Force Academy have a new, outside-the-box idea for dealing with these problems — use an aerospace approach.

This is yet to be developed to full-scale and tested in that form, but early computer and model-scale tests are showing higher efficiencies than wind turbines, according to the National Science Foundation (NSF).
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Solar Energy. Wind Energy. Now, Wave Energy. Reminds me of Captain Planet.

A Finnish company, AW-Energy, recently signed a $4.4 million (€3 million) contract with the European Union (EU) to implement WaveRoller (wave energy) technology in Portuguese waters. This looks interesting. The location for the project is near a town deemed to be “capital of the waves.”
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There is a new force on the wave-energy front. It’s called the Oyster. If it is successful in its debut this autumn, it could change the face of wave energy forever. You see, this giant electricity producing machine is different from conventional wave-energy machines. And those differences could make it extremely marketable.

The Oyster is unlike other wave power devices in that it uses hydraulic technology to transfer wave power to the shore to be converted into electricity. The machine has an 18m wide oscillator, which Dr. Ronan Doherty, Chief Technical Officer of Aquamarine Power the Edinburgh based company which has developed the first ‘Oyster’, says is a key to the machine’s design. The oscillator is fitted with pistons, which work according to wave action. The pistons pump high-pressure water through sub-sea pipelines to shore, where traditional hydro-electric generators use the high-pressure water to create electricity.

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Apparently, wave power plus offshore wind power equals something akin to Green Ocean Energy’s Wave Treader. The device is based on the Ocean Treader, a stand-alone wave power machine. According to Green Ocean Energy, its wind/wave power mash-up can generate 500 kW— enough for 125 average homes.
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With so much of our planet covered in the stuff, it is a surprise that water does not receive the attention that renewable technologies like wind and solar do. Nevertheless, with renewable energy being the catchphrase of many countries at the moment, advancements are being made towards a future where our oceans will provide us with electricity.

After two years, an oversized yellow buoy floating five miles off the southern tip of Long Beach Island has definitely proved its technology feasible. With the rise and fall of each wave, pistons slide up and down inside a cylinder within the buoy, generating electricity.

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Australian wave power generators inspired by nature’s know-how are meeting their development goals and have the potential to leave other renewable power sources in their wake.

Biopower Systems is just one of the wave-energy developers gaining attention by meeting its technological goals and backing this up with investment support. Read the rest of this entry »