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World's First Wave Farm Opens

Posted October 01, 2008 10:49 AM

From Neatorama:

The world's first commercial wave farm is operational three miles off the shores of Portugal. The three 140-meter generators were built by British company Pelamis. The "sea snakes" convert the kinetic energy of wave motion into electricity -enough to power 1,000 homes. Each of semi-submerged Pelamis devices is 142m long, has a diameter of 3.5m and is made from 700 tonnes of carbon steel. A single wave converter is composed of four articulated sections that move up and down as the waves pass along it. At each of the hinges between the sections, hydraulic rams use the wave motion to drive generators to produce up to 750KW of power at peak output. The electricity generated by the three Pelamis devices will be carried by undersea cable to a substation in Aguçadoura, which will then feed the power into the Portuguese national grid. The wave farm will eventually add another 25 generators, enough to produce up to 21 megawatts of power, with no CO2 emissions.

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Guru

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#1

Re: World's First Wave Farm Opens

10/02/2008 4:13 AM

Sounds interesting but a bit impractical.

Let's run them for a few years and see what happens. Imagine the cost of sending a crew out to do yearly maintenance.

Unfortunately, while there are lots of ways to make "free" energy, they usually end up being uneconomic.

I'd guess they'll cost about 3 million $US each (in production), has anyone got any feel for the true cost.

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#2

Re: World's First Wave Farm Opens

10/02/2008 7:19 AM

Very nice. But what will happen when the PETA/enviornmental nutcases decide some creepy crawly waterbug is impacted by these monsters? Has anyone done an enviornmental impact study? Let's see how it lasts.

Why fool with these methods of generating electricity when we already know Nuclear works and works well?

I don't object to trying this kind of thing. However, if all of the money wasted doing this kind of scheme and others like, wind, solar, all subsidized, were to be spent building one nuclear plant, the output of one nuclear plant would far exceed the output of all these schemes.

When an energy source can compete with coal, nuclear or gas powered generators on a one to one basis and win, that is when it will become a viable energy source.

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#3
In reply to #2

Re: World's First Wave Farm Opens

10/02/2008 1:20 PM

But for remote/isolated locations, having low power consumption requirements, this could be a much better solution. I'm not inclined to immediately pooh-pooh it just because it isn't the be-all and end-all answer. You could probably power all of Tahiti this way - wouldn't that be better than building a nuke plant there?

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#4

Re: World's First Wave Farm Opens

10/02/2008 10:03 PM

Far too many moving parts, that's the problem.

And what happens when there is a freak storm, and all those contraptions get loose: a sea-captain's nightmare.

Kind Regards....

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#5
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Re: World's First Wave Farm Opens

10/03/2008 6:25 AM

Good comment Sparkstation. A good Tsunami will pick it up and put it on shore along with all of the other debris. Imagine if there'd been a contraption like this near Ache Island when the Tsunami hit there.

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#6
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Re: World's First Wave Farm Opens

10/03/2008 7:40 AM

But that's the same risk we accept when we put in a pier or a jetty. Where the likelihood of storm/tsunami damage is highest, maybe maintain restrictions, but it still could be useful when properly sited. Look at the places we have put water wheels...

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#7
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Re: World's First Wave Farm Opens

10/03/2008 11:04 PM

Hello EnviroMan

We normally don't install waterwheels in the ocean.

Waterwheels are normally installed at the end of a penstock or leat.

The careful installation of any waterwheel ensures that in case of flood or other natural catastrophe, the waterwheel is bypassed via flood spillways and the like.

Kind Regards....

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