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Wave Power Fails To Live Up To Promise

the_newsbeagle writes: One of the leading companies developing wave power devices, Ocean Power Technologies, has dramatically scaled down its ambitions. The company had planned to install the world's first commercial-scale wave farms off the coast of Australia and Oregon, but has now announced that it's ending those projects. Instead it will focus on developing next-gen devices. Apparently the economics of wave power just don't make sense yet.

198 comments

  1. Nelson says: by I'm+New+Around+Here · · Score: 3, Funny

    Ha! Ha!

    --
    If you think I voted for Trump because of this post, you're wrong. I voted for Dr. Jill Stein of the Green Party. Again.
    1. Re:Nelson says: by Anonymous Coward · · Score: 0

      Keep suckin' that tailpipe.

    2. Re:Nelson says: by Anonymous Coward · · Score: 0

      Ha! Ha!

      And this is news because ??? i have been saying this for years they would generate more useful power playing 5 Knuckle Shuffle ( spanking the monkey for those stateside readers)..

  2. Golden opportunity missed... by TiggertheMad · · Score: 5, Funny

    "A spokesperson for Ocean Power Technologies announced, that after a number of years of testing and development efforts, that Wave farms are a wash."

    *ducks* *runs*

    --

    HA! I just wasted some of your bandwidth with a frivolous sig!
    1. Re:Golden opportunity missed... by galabar · · Score: 1

      Where are the mod points when you need them. :)

    2. Re:Golden opportunity missed... by binarylarry · · Score: 2

      The whole business model smells fishy.

      --
      Mod me down, my New Earth Global Warmingist friends!
    3. Re:Golden opportunity missed... by slinches · · Score: 4, Funny

      Oh, darn. We must be on different wavelengths. Last I heard, they were doing swell.

      I guess these sorts of things just ebb and flow with the economic tides.

      --
      Knowledge Brings Fear
    4. Re:Golden opportunity missed... by husker_man · · Score: 1

      Here, let me fetch a few more puns for you. (in nautical terms, fetch is the swells built up from a wind).

    5. Re:Golden opportunity missed... by Bill,+Shooter+of+Bul · · Score: 3, Funny

      I don't get it.

      Could you explain that some more? Explaining jokes always make them funnier.

      --
      Well.. maybe. Or Maybe not. But Definitely not sort of.
    6. Re:Golden opportunity missed... by Anonymous Coward · · Score: 3, Funny

      Could you explain that some more? Explaining jokes always make them funnier.

      A note for the humor impaired: The above is using what is termed irony and sarcasm, and the poster is actually giving criticism.

      Next week, we will cover metaphors. And by metaphors, I mean big tits.

    7. Re:Golden opportunity missed... by Anonymous Coward · · Score: 0

      If you have to explain a joke its not funny.

    8. Re:Golden opportunity missed... by CreatureComfort · · Score: 1

      Is that simile to cleavage?

      --
      "Unheard of means only it's undreamed of yet,
      Impossible means not yet done." ~~ Julia Ecklar
    9. Re:Golden opportunity missed... by Inzkeeper · · Score: 5, Funny

      It looks like we will need to find a more feasible way to generate electricity from water, dam it.

    10. Re:Golden opportunity missed... by Pope · · Score: 3, Funny

      As always, the truth is in the middle.

      --
      It doesn't mean much now, it's built for the future.
    11. Re:Golden opportunity missed... by Bob+the+Super+Hamste · · Score: 4, Funny

      I was thinking of huge tracts of land.

      --
      Time to offend someone
    12. Re:Golden opportunity missed... by Citizen+of+Earth · · Score: 3, Insightful

      This project was very successful, considering that the central purpose of all alternative-energy projects is to extract government subsidies. Any other outcome is coincidental.

    13. Re:Golden opportunity missed... by Anonymous Coward · · Score: 2, Funny

      Oh, dam.

      FTFY

    14. Re:Golden opportunity missed... by mpe · · Score: 1

      This project was very successful, considering that the central purpose of all alternative-energy projects is to extract government subsidies.

      Is that "alternative-energy" or "alternative to energy".

    15. Re:Golden opportunity missed... by Anonymous Coward · · Score: 0

      This was NOT new science. This process has been known for nearly 100 years. These fools like most people don't care about history, and therefore become fools. Ergo, more fools believe that this was a great new invention and become fools. Listen to the fool, become the fool.

    16. Re:Golden opportunity missed... by Anonymous Coward · · Score: 0

      Here, let me fetch a few more puns for you.

      (in nautical terms, fetch is the swells built up from a wind).

      Stop trying to make 'fetch' happen. It's not going to happen.

    17. Re:Golden opportunity missed... by StripedCow · · Score: 2, Funny

      The problem with wave farms is that they harness the gravitational power between Earth and the Moon.
      If this energy is dissipated, this gravitational force is reduced, and as a consequence, the Moon will move towards the Earth in an increased pace.

      --
      If Pandora's box is destined to be opened, *I* want to be the one to open it.
    18. Re:Golden opportunity missed... by Anonymous Coward · · Score: 0

      Tides are caused by the "tidal" forces between the earth and moon. Waves are caused (mostly) by winds.

    19. Re:Golden opportunity missed... by ray-auch · · Score: 1

      *ducks* *runs*

      So that's Salter Ducks, obviously intentional..., but then what is the runs ?

    20. Re:Golden opportunity missed... by vettemph · · Score: 1

      My kingdom for a mod point. Well Done.

      --
      The government which is strong enough to protect you from everything is strong enough to take everything from you.
    21. Re: Golden opportunity missed... by Anonymous Coward · · Score: 0

      Who said it was new science?

    22. Re:Golden opportunity missed... by slew · · Score: 1

      the Moon will move towards the Earth in an increased pace.

      Maybe that will be just enough to keep the moon from flying off into space since normally the moon is moving away/B from earth at about 4cm a year because it pulls on the earth's rotating surface which causes a slight acceleration... Or maybe it won't make any difference at all ;^)

    23. Re:Golden opportunity missed... by skids · · Score: 1

      It was application of modern engineering to the old idea, to attempt to make it economicaly feasible. Nobody ever claied it was "new science" because that would have been ridiculous.

    24. Re:Golden opportunity missed... by drainbramage · · Score: 1

      Wave power has always had its ups and downs.

      --
      No brain, no pain.
    25. Re:Golden opportunity missed... by drainbramage · · Score: 1

      What we need here is a car(p) analogy.

      --
      No brain, no pain.
    26. Re:Golden opportunity missed... by TheInternetGuy · · Score: 1

      The problem with wave farms is that they harness the gravitational power between Earth and the Moon. If this energy is dissipated, this gravitational force is reduced, and as a consequence, the Moon will move towards the Earth in an increased pace.

      I think you might need to go back and re read physics for dummies.

      --
      If my comment didn't sound as good in your head as it did in mine, then I guess we all know who's to blame
    27. Re:Golden opportunity missed... by WalksOnDirt · · Score: 2

      The problem with wave farms is that they harness the gravitational power between Earth and the Moon.

      No, that would be tidal power. The wave energy comes mostly from the wind. The main side effect that occurs to me would be less coastal erosion.

      --
      a,e,i,o,u and sometimes w and y (at be if of up cwm by)
    28. Re:Golden opportunity missed... by Aighearach · · Score: 3, Informative

      Yeah, they were proposing and building these giant 140ft by 40ft monstrosities that would have been disruptive to fishing and wildlife, and totally incompatible with the expectations of the community. Oregonians support wave power, but it needs to be slender buoys that are more like artificial kelp; something that creates artificial habitat, not something large and industrial that pushes nature out of the way.

      There are actually a bunch of other pilot projects, some of which are more likely to move forwards.

      Also keep in mind, they only had approval for the pilot project to test the feasibility. Nobody promised any permits for the large scale project. The pilot would have had to prove not only that it generated power, but also that it didn't interfere with wildlife or fishing. And it wasn't designed to meet the actual standards it would have needed to meet. Probably they thought they could bribe their way through, found out that doesn't work here, and are winding it down and blaming efficiency delays.

      And, it turns out they don't have funding anyways, so they can't really move the project.

      They admit in their press release that other companies have more mature products not only on the market, but proven.

    29. Re:Golden opportunity missed... by riverat1 · · Score: 2

      So you don't think anything is worth trying unless you can tell ahead of time if it's going to work or not? There's a lot of energy to be extracted from waves if we can figure out how to harness them.

    30. Re:Golden opportunity missed... by Anonymous Coward · · Score: 0

      If you compare wave-energy dissipating capabilities of a few wave-farms against that of all the continents that block the path of the water-bulge created by the moons gravity, I bet it can't even significantly slow down the 4cm/year the moons moving away from us, let alone reverse it.
      That being said, tapping into geothermal energy invariably speeds up the deadline of our magnetosphere's demise.
      It really breaks my nuts when discovery channel and national geographic call geothermal endless energy -.-

    31. Re:Golden opportunity missed... by tehcyder · · Score: 1

      I think you should take a quick shufty at "Jokes For Dummies".

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    32. Re:Golden opportunity missed... by tehcyder · · Score: 1
      My solution is to promote research into making waves even bigger and more dangerous than they are now.

      And, no, there isn't any reduction in carbon emissions or anything.
      Just fewer surfers.

      --
      To have a right to do a thing is not at all the same as to be right in doing it
    33. Re:Golden opportunity missed... by TheInternetGuy · · Score: 1

      I think you should take a quick shufty at "Jokes For Dummies".

      A simple whoosh will do nicely here on Slashdot, thank you very much :)

      I probably should had put a ;-> smiley after my original comment to indicate that I was also not very serious.

      --
      If my comment didn't sound as good in your head as it did in mine, then I guess we all know who's to blame
    34. Re:Golden opportunity missed... by davester666 · · Score: 1

      The economics are still under water.

      --
      Sleep your way to a whiter smile...date a dentist!
  3. Lots of problems with it by gurps_npc · · Score: 3, Insightful
    But I can easily see a small scale usage for it.

    Primary examples would be installed on sea installations, like say oil drilling platforms. Why ship in fuel to an oil drilling platform, when you can simply install a wavepower generator to provide the power. Then, once you find oil, you don't have to get rid of the wave power generator. Keep it and use wave power to get the oil, rather than burning oil just to get more oil.

    Also, I could easily see a small scale wave power generator designed for boats, particularly house boats.

    --
    excitingthingstodo.blogspot.com
    1. Re:Lots of problems with it by galabar · · Score: 2

      This all depends on what they were able to engineer. It may be the case that none of those things are possible with the current generation of device, with the benefits still remaining theoretical.

    2. Re:Lots of problems with it by Charliemopps · · Score: 1, Funny

      So, you want to install a "Wave harnessing device" on a boat who's primary mission is to stay moored in the same place without moving despite wind and waves? You don't see a problem with that?

      It'd be the equivalent of mounting a windmill to a blimp.

    3. Re:Lots of problems with it by TWX · · Score: 1

      How about just using the natural gas pressure and burnoff to generate power as opposed to simply lighting it off as an open flame?

      I'm all in favor of using noncombustible means to produce energy, but I'm also happy to go for the low-hanging fruit. If oil wells and other fossil-fuel recovery operations can use a byproduct of their main purpose, just use that instead.

      --
      Do not look into laser with remaining eye.
    4. Re:Lots of problems with it by SQLGuru · · Score: 1

      Most of the solutions for harnessing wave power that I've seen rely on something staying moored in the same place and letting the waves go back and forth over the device. So, a boat anchored for a time could use a similar device (probably combined with something to harness the sun and winds, too -- power needs probably exceed the generation capabilities of each of them individually). While the boat is moving, you have an engine which can generate power as well as locomotion. So, I don't really see the problem with it.

    5. Re:Lots of problems with it by fustakrakich · · Score: 1

      How about just using the natural gas pressure and burnoff to generate power as opposed to simply lighting it off as an open flame?

      Economics also precludes that. It is cheaper to burn it off, or like a dairy farmer throwing his milk down the sewer to prop up the price.

      --
      “He’s not deformed, he’s just drunk!”
    6. Re:Lots of problems with it by Jane+Q.+Public · · Score: 1

      Small waves and ripples carry a lot of energy. Even the small waves that are not, on average, enough to budge a houseboat at all, can charge batteries and power lights, pumps, TVs, etc.

    7. Re:Lots of problems with it by pj2541 · · Score: 1

      No, it's like mounting a windmill on a TETHERED blimp. The tethers (or anchor lines) may have to be stronger, but it will produce power as long as they hold.

    8. Re:Lots of problems with it by GrumpySteen · · Score: 2

      It'd be the equivalent of mounting a windmill to a blimp.

      That's more feasible than you think

    9. Re:Lots of problems with it by sexconker · · Score: 1

      So, you want to install a "Wave harnessing device" on a boat who's primary mission is to stay moored in the same place without moving despite wind and waves? You don't see a problem with that?

      It'd be the equivalent of mounting a windmill to a blimp.

      Physics doesn't apply to the greenies.

    10. Re:Lots of problems with it by tomhath · · Score: 1

      It would work intermittently, like wind and solar, so you still need a full size backup generator. Then you have to wonder if the double cost is worth it.

    11. Re:Lots of problems with it by Charliemopps · · Score: 2

      It'd be the equivalent of mounting a windmill to a blimp.

      That's more feasible than you think

      That's hilarious... but it could work if its tethered.

      I don't think it'll work with an oil platform. The waves are too strong and the steel is too weak. Platforms get destroyed in storms already... now imagine if it had big wave capturing devices attached to it. Perhaps in an emergency it could cut the wave device loose?

    12. Re:Lots of problems with it by Charliemopps · · Score: 1

      Which is why I think attaching something that harnesses that energy to a fragile structure connected to a well capable of ruining a large part of the local ecosystem is a bad idea.

    13. Re:Lots of problems with it by Charliemopps · · Score: 2

      Hurricanes. Hurricanes are the problem.

      Remember this oil rig?
      http://en.wikipedia.org/wiki/D...

      And that was without the wave capturing nonsense attached.

    14. Re:Lots of problems with it by GameboyRMH · · Score: 1

      I'll have mine with two big hands painted on the sides XD

      --
      "When information is power, privacy is freedom" - Jah-Wren Ryel
    15. Re:Lots of problems with it by Marxist+Hacker+42 · · Score: 1

      Or just in an emergency, raise the gate on the wave device and let the water wash UNDER it.

      --
      SJW: a person who perceives an injustice, and while correcting it, commits a greater injustice.
    16. Re:Lots of problems with it by ColdWetDog · · Score: 1

      Wave generators rely on bolting something down to the seafloor for stability and using the wave energy to push something back and forth. On a deep ocean drilling platform, you typically won't have the organized wave activity found on the coast where the slope of the seafloor guides the waves.

      You still have the current (in some places)which could be used to drive a turbine but the big problem is that the energy density isn't all that high. That means you have to capture a wide area of wave or current. Which means big things. Big things in the ocean mean big costs, both in construction and maintenance. The ocean is a mean and nasty environment. WD-40 can only go so far.

      --
      Faster! Faster! Faster would be better!
    17. Re: Lots of problems with it by Anonymous Coward · · Score: 0

      Citation needed (you're speaking out of your ass). the amount captured is relative to other things.

    18. Re:Lots of problems with it by Anonymous Coward · · Score: 0

      The more solidly moored in one place the boat is, the better a wave-powered generator would work. I mean, the more the waves move relative to the boat, the more energy you can harness from them. The best case is something solidly attached to the sea floor. Doesn't anybody think with their brain anymore?

    19. Re:Lots of problems with it by shaitand · · Score: 1

      "So, you want to install a "Wave harnessing device" on a boat who's primary mission is to stay moored in the same place without moving despite wind and waves? You don't see a problem with that?"

      I certainly don't. If the boat has generators absorbing the wave motion energy that energy isn't there to move the boat.

    20. Re:Lots of problems with it by TWX · · Score: 1

      I'm not talking about resale though, I'm talking about use on the platform itself. To modify your analogy, it'd be like the farmer drinking all of the milk that he needs before he throws milk down the sewer.

      I am aware that space is at a premium on an oil rig, but wouldn't being able to direct natural gas through a generator for rig power make sense, since they already have to have a generator on-board for whatever refined fuel is delivered by ship? If the line pressure is too low then they may need something to act as a compressor, but it should still be able to be sized to power the whole rig, probably with gas to spare/burn off.

      --
      Do not look into laser with remaining eye.
    21. Re: Lots of problems with it by Anonymous Coward · · Score: 0

      You're still not getting it. The oil companies aren't interested in the most efficient process, they're interested in the cheapest process. There is probably zero financial incentive for them to install natural gas generators on their rigs, and for those companies that is the only incentive they care about.

    22. Re:Lots of problems with it by rogoshen1 · · Score: 1

      couldn't it be attached to the dampeners/shock absorbers and function much the way regenerative braking systems work?

    23. Re:Lots of problems with it by flaming+error · · Score: 1

      "The best case is something solidly attached to the sea floor"
      Then you should mount it to the dock, not the boat.

    24. Re: Lots of problems with it by MickLinux · · Score: 1

      I would suggest an offshore power backbone, tied to wave/wind/solar, and back that up with natural gas. With gas turbines, you don't need to have power 100% of the time, and the renewable energy averages out anyhow.

      --
      Correct Horse Battery Staple: 72 bits of entropy. Enter "Correct H" into google. When it generates the phrase, that's
    25. Re:Lots of problems with it by skids · · Score: 1

      Doesn't actually have to be based on the mooring. Damper mechanisms may be deployed to reduce wave shock. Dampers dissipate energy. They are essentially generators that do something useless with the resulting energy, like convert it to heat. Which is why the MIT kids evaluated regenerative shocks for cars and nobody that knew their ass from their elbow accused them of trying to make a perpetual motion machine.

    26. Re:Lots of problems with it by skids · · Score: 1

      Wave energy is actually known as one of the less intermittent renewable resources. There is seasonal variation, but at certain sites there are pretty much always waves and it can be used as a baseline power source. The only things more reliable are tidal and geothermal.

    27. Re:Lots of problems with it by Anonymous Coward · · Score: 0

      They already do. Ive worked on many rigs, and all have been self sustaining from the excess gas produced by the wells.

    28. Re: Lots of problems with it by JonathanR · · Score: 1

      Flares are part of the pressure containment safety systems. Very few modern operations flare gas willy nilly.

      The last project I worked on included flare gas recovery. Most power generation is fired by "waste" gas, and usually includes waste heat recovery for process heating.

    29. Re:Lots of problems with it by gurps_npc · · Score: 1

      They do that already. But they get so much that they still have to burn it off

      --
      excitingthingstodo.blogspot.com
    30. Re: Lots of problems with it by Jane+Q.+Public · · Score: 1

      Experiment needed, bozo.

      Put a smallish (30 cm^3) piece of styrofoam on water that has a decent amount of ripples, and try to hold it still.

      You don't need Wikipedia to do that.

  4. some renewable techs didn't pan out by Anonymous Coward · · Score: 1

    Some renewable energy techs are less competitive than others. Hydroelectric has been the leader. Then comes wind. then solar. geothermal might fill a few niches. Wave, OTEC, and tidal don't work for widescale power.

    1. Re:some renewable techs didn't pan out by michael_cain · · Score: 2

      Can't speak to wherever in Australia they were planning, but Oregon is a tough market. Lots of hydro, growing wind segment, and not enough transmission capacity to make sure excess can be shuffled off to other markets. 2011 was a wet year, and oversupply was already somewhat of a problem. The economics for intermittent renewable sources -- wind, solar, wave -- get worse in a hurry if you can't sell all the power you could potentially generate.

    2. Re:some renewable techs didn't pan out by TapeCutter · · Score: 3, Informative

      South Australia is 30% renewable despite a current federal government that is openly hostile to clean energy. The reasoning behind that ideological hostility is not difficult to spot - coal is our #1 export. India has recently declared that large scale PV solar is cheaper than Australian imported brown coal and is switching 400M people to solar over the next decade or so. Prices for coal are way down and mines are currently being mothballed, even those mining the high quality coking coal used to make chinese steel have seen recent mine closures.

      The anti-science luddites in charge of this country can see the writing on the wall for the global coal industry, the words "stranded assets" are scaring them shitless. They lack the wisdom and intellectual independence required to plan a smooth transition so they do what politicians do best, fight it tooth an nail with tabloid propaganda and rigged domestic markets.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    3. Re:some renewable techs didn't pan out by uninformedLuddite · · Score: 1

      I'm in SA and live completely off grid. SA is a great place for solar.

      --
      The new right fascists are bilingual. They speak English and Bullshit.
  5. When doing anything involving the ocean by geekoid · · Score: 3, Interesting

    Take you expected costs, double it, then throw the piece of paper way because it's still useless.

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
    1. Re:When doing anything involving the ocean by MightyYar · · Score: 5, Informative

      People who have never worked in a marine environment just don't understand this. Seawater is nasty, nasty stuff to anything. Plastic, metal, wood - it doesn't matter. Add a mechanical part and it just becomes a nightmare. The navy, for instance, is continuously painting their ships. As in, they never stop painting them. If you have an offshore wind farm, offshore wave farm, or whatever - you will spend far more on maintenance than you ever do on capital costs. And you have to restrict the technology to proven, overbuilt, and simple. Even titanium will fail in salt water (hydrogen embrittlement)... not a nice place to engineer for.

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
    2. Re:When doing anything involving the ocean by NatasRevol · · Score: 0, Flamebait

      Somebody should probably go check out those garbage islands in the pacific and see what survives best.

      --
      There are two types of people in the world: Those who crave closure
    3. Re:When doing anything involving the ocean by itzly · · Score: 3, Insightful

      There are no "islands". Just a higher density of tiny bits of plastic.

    4. Re:When doing anything involving the ocean by Jane+Q.+Public · · Score: 4, Interesting

      When I was a child, we had a nice wood boat. A ChrisCraft. The finish was getting pretty weather-worn so my father took it to a guy who refinished boats to get it done. He specified brass screws, just like the original. The refinisher said, "Everybody uses stainless steel these days. They're just as good." My father reluctantly let him use the stainless steel screws.

      The boat was moored by strong chains to a dock in the ocean. (You had to leave lots of play in the chains so the boat could ride up and down with the tide.) A few weeks later, by family got a call from the SeaBees. They had found the boat, dangling underwater by the chains holding it to the dock pilings.

      The seawater had eaten the stainless steel screws right up. It only took a few weeks.

    5. Re:When doing anything involving the ocean by swb · · Score: 4, Interesting

      The original screws were probably bronze, not brass. Bronze has no appreciable zinc while brass contains a lot of zinc. Immersed in sea water, brass will dezincify and corrode.

      Most marine raw water systems use bronze fittings for this reason.

      Stainless isn't suitable for below the waterline applications because the chromium can't form a protective oxidization layer due to the lack of oxygen exposure.

      Your boat would have sunk with brass or stainless screws.

    6. Re:When doing anything involving the ocean by dcollins117 · · Score: 4, Funny

      They had found the boat, dangling underwater by the chains holding it to the dock pilings.

      Find out what the chains are made of - you'll be all set :)

    7. Re:When doing anything involving the ocean by Noah+Haders · · Score: 1

      There are no "islands". Just a higher density of tiny bits of plastic.

      yes and I'm just a high density collection of water and organic matter.

    8. Re:When doing anything involving the ocean by itzly · · Score: 3, Informative

      The great pacific garbage patch has a density of 4 small pieces of plastic per cubic meter. You wouldn't even notice it if you were sailing through it.

    9. Re:When doing anything involving the ocean by Noah+Haders · · Score: 1

      I visualize it more as a floating island.

    10. Re:When doing anything involving the ocean by Anonymous Coward · · Score: 0

      Bridges near the ocean (e.g. Golden Gate Bridge) are also continuously painted. Salt water is extremely caustic, especially over time.

    11. Re:When doing anything involving the ocean by jfengel · · Score: 1

      Yep. Still sufficient reason to reduce the amount of plastic that gets into the oceans, but unfortunately, it seems really hard to get people to take any positive environmental steps unless you exaggerate it into ugly, apocalyptic terms. And even then, for every person you convince by it, there will be one who heard that it was exaggerated and concluded that therefore nothing needs to be done at all.

    12. Re:When doing anything involving the ocean by Mike+Buddha · · Score: 2

      That's what the sensationalists would have you believe.

      --
      by Mike Buddha -- Someday the mountain might get him, but the law never will.
    13. Re: When doing anything involving the ocean by Anonymous Coward · · Score: 0

      Sensationalists exaggerating the truth?? Inconceivable.

    14. Re: When doing anything involving the ocean by Anonymous Coward · · Score: 0

      The obvious solution is to desalinate the ocean.

    15. Re:When doing anything involving the ocean by TapeCutter · · Score: 1

      Water. AKA - "The universal solvent". I personally think wind farms are economically viable in many places, but not so much offshore for precisely the reasons you mention.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    16. Re:When doing anything involving the ocean by TapeCutter · · Score: 1

      Actually there are a few tiny natural islands in the region where the shoreline is buried under a couple of meters of junk, mostly driftwood and large bits of plastic.

      --
      And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
    17. Re:When doing anything involving the ocean by EthanBernard · · Score: 1

      The originals were probably made of naval brass, which has a little tin added to prevent dezincification. Or they might have been cupronickel.

      _______________
      If misery is the only thing that prevents a population from growing, then a population will grow until it is miserable.

    18. Re:When doing anything involving the ocean by I'm+New+Around+Here · · Score: 1

      Adamantium.

      --
      If you think I voted for Trump because of this post, you're wrong. I voted for Dr. Jill Stein of the Green Party. Again.
    19. Re:When doing anything involving the ocean by Anonymous Coward · · Score: 0

      Brass is a variety of bronze.

    20. Re:When doing anything involving the ocean by Anonymous Coward · · Score: 0

      not when most of them appear to be scams, kind of like wave power.

      *ducks*

    21. Re:When doing anything involving the ocean by LordLimecat · · Score: 1

      And I visualize this thread as being filled with more fact and less opinion, but somehow its not changing reality :(

    22. Re:When doing anything involving the ocean by Jane+Q.+Public · · Score: 1

      You are probably correct. They looked like brass, but they were most likely bronze. In any case: the original screws held up to seawater, while the stainless screws were gone in a short time.

    23. Re:When doing anything involving the ocean by Jane+Q.+Public · · Score: 1

      They were plain iron chains. It is not a very suitable material for making finish screws.

  6. Oregon... by Nerrd · · Score: 5, Informative

    Part of the problem might be that they can't sell the power. The wind farms we currently have are already producing more power than the bonneville power administration is willing to purchase - even though they are under contract to do so.

    1. Re:Oregon... by Archangel+Michael · · Score: 1

      Then convert the wind power into hydrogen, for longer term storage, when wind is not available. Yeah, it isn't very efficient, but it is better than wasting it on feeding the grid that doesn't need it.

      --
      Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.
    2. Re:Oregon... by neoritter · · Score: 1

      Convert energy into hydrogen what?

    3. Re:Oregon... by Nerrd · · Score: 1

      The more reasonable approach - which is actually used in a lot of places - is to pump water uphill. The real problem is when there is no shortage of water, and the reservoirs are full. This is precisely their argument when not honoring wind contracts.

    4. Re:Oregon... by Jane+Q.+Public · · Score: 2

      What they should do is use the ocean version of "pumped storage": build a giant vertical cylinder in the ocean, and when you have surplus electricity you pump water OUT of the chamber. Then when usage peaks and you need more electricity, you let water run back in and turn turbines to generate it.

      It's probably a hell of a lot cheaper than batteries. Pumped storage has been an up-and-coming technology for 20 years now. I worked on one project in which they hollowed out an entire stone mountain, creating huge chambers to store water for a pumped-storage system.

    5. Re:Oregon... by rasmusbr · · Score: 2

      Hmm, I don't know.

      Suppose you build a tube (radius = 100 m) out of concrete where the water is 200 m deep. If I'm not mistaken you could then store up to this http://www.wolframalpha.com/in... much energy in watt-hours. That's not a lot in the big scheme of things. To store one terrawatt-hour you would need a tube that's 2.5 km in radius, or lots and lots of smaller tubes.

      Unless I messed up my high school level physics calculation there.

    6. Re:Oregon... by Marxist+Hacker+42 · · Score: 1

      feed the energy into water to produce hydrogen, I think he means.

      --
      SJW: a person who perceives an injustice, and while correcting it, commits a greater injustice.
    7. Re:Oregon... by ColdWetDog · · Score: 3, Funny

      Just use the extra electricity to power giant air conditioners to counteract global warming.

      See, that was easy. Just start thinking in terms of larger systems.

      --
      Faster! Faster! Faster would be better!
    8. Re:Oregon... by AmiMoJo · · Score: 1

      You wouldn't need anything like a 1TWh. All you need is enough to smooth output of an intermittent source a bit and give you s little longer to ramp up other energy sources. On Japan a 250MW wind farm gets a 40MWh battery for smoothing.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    9. Re:Oregon... by david_thornley · · Score: 1

      Not to mention you're putting the generators 200m deep (I suppose the pumps can be on the surface, with a long enough hose). They're going to need quite a bit of maintenance, and doing that at 200m is going to be quite expensive.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
    10. Re:Oregon... by Jane+Q.+Public · · Score: 1

      Such systems are being built today and I helped build one myself in a small way, when I was working for an engineering firm.

      Pumped storage is an excellent way to store that energy, because infrastructure is relatively cheap, and losses are minimized. (Compare to trying to store the same energy with chemical batteries.) But you are mistaken about one thing. You don't build just one super-huge tank; you soon run into diminishing returns. Instead you build a lot of smaller tanks. That's more reliable anyway.

    11. Re:Oregon... by Jane+Q.+Public · · Score: 1

      If they can build offshore oil platforms, they can do this. (They ARE doing this.)

  7. Re:Wave power can work by Anonymous Coward · · Score: 0

    wow

  8. sorry by Charliemopps · · Score: 2, Interesting

    Moving parts = bad idea.
    Moving parts in salt water?
    Repairs under water?!?!
    It's as simple as that.

    1. Re:sorry by CaptainLard · · Score: 1

      Don't most ships these days have propellers?

    2. Re:sorry by Megol · · Score: 1

      WTF... You aren't an engineer that's for sure.

    3. Re:sorry by Anonymous Coward · · Score: 1

      Indeed they do, and they have to be replaced regularly. Not from corrosion, but the particulates within the water literally destroy the props.

      Changing a prop set on a ship is a basic operation, you do it per ship. Wave generators need potential maintenance for miles of the device chains. With a life of 10-15 years, they're clearly not worth the hassle, especially as they generate so little power compared to wind which can be put in the same place.

    4. Re:sorry by Anonymous Coward · · Score: 0

      Yeah, it's not like we know how to make brass.... You're funny, you're a Space Nutter that supports ridiculously complex, expensive fantasies that will never happen, but a brass prop in the ocean baffles you...

    5. Re:sorry by Anonymous Coward · · Score: 0

      Yeah, brass is the answer.

      LOL.

    6. Re:sorry by Anonymous Coward · · Score: 1

      Most ships hang out in a dry dock to fix things at one point or another. Usually replacing hull plates and propellers. They have sacrificial metal on them to help stem the loss but eventually you have to replace those too. If they can get away with fixing anything underwater they *may* send a scuba diver to do it as that is much cheaper than docking the whole thing. Sometimes though you have to pull the whole shaft at which point you dry dock it.

      The sea is a harsh mistress. It is full of tons of junk that react with other things. It is not like the water you get out of the tap.

      Many people who buy a boat quickly find they are money sinks. As everything on it is either rotting or breaking. Even the fiberglass. Sea water is almost a weak acid.

    7. Re:sorry by dkman · · Score: 0

      They should use plastics, that stuff floats around out there for years.

      --
      I refuse to sign
    8. Re:sorry by Anonymous Coward · · Score: 0

      I'm pretty sure all powerplants require constant maintenance, most involving moving parts and water.

    9. Re:sorry by Anonymous Coward · · Score: 2, Informative

      I've been on/around boats and ships my whole life. I think in the past 40 years I've seen 2 propellers changed out, and it had nothing to do with particulates in the water. It was always because it ran aground. If we are talking about big ships, sorry but I've never seen a prop changed out, even when going into dry dock (where it is usually performed due to damage). most of the time you need to work on the prop system its because you forgot to replace the sacrificial anode and you have to replace the shaft. Replacing a propeller on a ship is in no way a basic job, nor is it performed regularly.

    10. Re:sorry by Charliemopps · · Score: 1

      Ships can be taken out of the water.
      Propellers are not moving parts. They are fixed, to a shaft that enters the dry part of the boat through a series of bushings. The "Mechanism" is inside the boat.

      These wave capture devices are complex folding structures that are entirely under water. Even something as simple as a hing is going to fail in short order under water. Ever had a fish tank? Even freshwater tanks have to have their pumps constantly cleaned and maintained. It's fact. Moving parts in salt water is a terrible idea.

    11. Re:sorry by Anonymous Coward · · Score: 0

      Moving parts in salt water under water .... in a high wave energy area.

      Anything not corroded would get beaten to death.

    12. Re:sorry by Anonymous Coward · · Score: 0

      Yeah no kidding, I hate it when armchair professors come around with their Incredible Statements of Irrefutable Fact. I'll bet the OP doesn't even have a RC boat, let alone even been on a canoe in his life!

    13. Re:sorry by Anonymous Coward · · Score: 0

      Never said that, all I said was that moving parts in salt water are as old as the hills.

      LOL.

      Go masturbate some more to Mars colony artwork, you delusional lackwit.

    14. Re:sorry by jabuzz · · Score: 1

      Bingo we have a winner. High pressure steam is extremely corrosive as well.

    15. Re: sorry by MickLinux · · Score: 1

      I wonder: alternating neodynium magnets and ferrous enhanced coils, with air gaps between. As the wave comes through, and changes the interveningcore material (Air/salt-water), I'd expect a current in the coils.

      probably not practical.

      Option 2: porcelain and plastic rockers, with magnetics inside.

      Option 3: a float, a unidirectional clutch (like a bike), a drive belt, and a shaft to an unexposed generator.

      I think there have been some good wave generators out there (IIRC, Scotland comes to mind). I'm inclined to believe it is the power transmission / distribution / production companies.

      For that, I think the answer is to target specific industries, and set up near them. Provide your own power lines. For example, use your power to produce fresh water and brine; dry the brine to produce sea salt, and sell the water to water-rights states.

      --
      Correct Horse Battery Staple: 72 bits of entropy. Enter "Correct H" into google. When it generates the phrase, that's
    16. Re:sorry by AmiMoJo · · Score: 1

      That's rather pessimistic. Just because an environment is harsh we don't give up, we overcome the problems.

      --
      const int one = 65536; (Silvermoon, Texture.cs)
      SJW, n: "Someone I don't like, and by the way I'm a fuckwit" - AC
    17. Re:sorry by david_thornley · · Score: 1

      We overcome the problems if there's a strong enough reason (and the problems aren't intractable). If wave power winds up being an order of magnitude more expensive than wind or solar, it's not worth solving the problems.

      --
      "When you have eliminated the unacceptable, whatever is left, however improbable, must be the truthiness" - Holmes
  9. Re:Wave power can work by hey! · · Score: 2

    I think he's off his meds again.

    --
    Post may contain irony: discontinue use if experiencing mood swings, nausea or elevated blood pressure.
  10. Re:Wave power can work by Archangel+Michael · · Score: 3, Insightful

    Because artificial manipulations of free markets always works out as intended!

    --
    Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.
  11. Mechanical stresses ... by gstoddart · · Score: 4, Informative

    I seem to recall a news story from a few years ago where they'd tried to put wave power in the Bay of Fundy, where the highest tides in the world are.

    OpenHydro -- the Irish company which installed the world's first 1-megawatt tidal turbine in the Bay of Fundy -- and its partner Nova Scotia Power deployed the 10-tonne turbine on the floor of the Minas Passage in November 2009.

    Then just 20 days later, all 12 turbine rotor blades were destroyed by tidal flows that were two and a half times stronger than for what the turbine was designed.

    Basically, the tides destroyed the machinery in three weeks or so.

    So, yes, there's plenty of mechanical energy to harvest. The problem is that it might also be stronger than the stuff you've built.

    --
    Lost at C:>. Found at C.
    1. Re:Mechanical stresses ... by Anonymous Coward · · Score: 0

      That's fucked up. Surely we can 3D print a new turbine in 6 days?

    2. Re:Mechanical stresses ... by jasonrice22 · · Score: 1

      So, yes, there's plenty of mechanical energy to harvest. The problem is that it might also be stronger than the stuff you've built.

      It sounds like the same problem as cold fusion. Perhaps someone should try to develop dry wave power. =P

    3. Re:Mechanical stresses ... by Anonymous Coward · · Score: 0

      Perhaps they could build smaller and in more numbers instead of larger.
      Seems larger will just break things too much due to the stresses, and stronger materials will just cost even more.

      But I am not an engineer, I still don't know why they build large wind power blades instead of having loads of smaller ones up a tower, or even an n-shaped tower, and have smaller turbines across the bridge of the 2 legs of the n.
      Any engineers in know why they build larger instead of smaller? I could just imagine triangle patterns of these towers, or hexagons, and all the support bridges between them having several turbines on them.
      Surely it also makes repairs easier too since if one large thing fails horribly, it will take longer to remove it, whereas a tiny little thing will be in, disconnect, let go, crane the new one in, fasten, reconnect, off you go.
      Again, totally not an engineer. Any ideas if this would work, or is the actual dynamo itself the issue? Too low a gain with smaller motors rotating? Even if they do spin faster and more constantly in lesser winds?

    4. Re:Mechanical stresses ... by Anonymous Coward · · Score: 0

      Tidal power and wave power are two different things.

    5. Re:Mechanical stresses ... by NEDHead · · Score: 1

      longer blades=more efficient

    6. Re:Mechanical stresses ... by Marxist+Hacker+42 · · Score: 3, Funny

      dry wave power=wind

      --
      SJW: a person who perceives an injustice, and while correcting it, commits a greater injustice.
    7. Re:Mechanical stresses ... by Anonymous Coward · · Score: 1

      > Tidal power and wave power are two different things.

      Specifically, tidal power period ~ 12.42 hours (in most places), wave power period ~ 15 seconds.

      Tidal flows you harness with a spinning propeller (turbine) much like wind power.

      Waves (the surfing kind) you harness by all means of exotic mechanical snakes, blowholes, inverted yo-yos, inertial systems, ...

    8. Re:Mechanical stresses ... by Anonymous Coward · · Score: 0

      ... and in some exotic cases like the Bay of Fundy you can fill a "dam" at high tide and let the water out at low tide to make a traditional hydro-station.

      But, in general, a six-foot tide like most of us get does not provide the hydraulic head to make that worth while.

      Wave power is a bitch to harness, horizontal tidal flow with a turbine much easier, but there are only so many places in the world where the coastline is just right for that.

    9. Re:Mechanical stresses ... by mpe · · Score: 1

      Specifically, tidal power period ~ 12.42 hours (in most places), wave power period ~ 15 seconds.

      Wave power has the same problem as applies to wind and solar, variable with a strong random element.

    10. Re:Mechanical stresses ... by Anonymous Coward · · Score: 0

      longer blades = more likely to get torn off under water

    11. Re: Mechanical stresses ... by MickLinux · · Score: 1

      Sorry, previous oposter lacks imagination.

      Dry wave power = sand dunes,

      --
      Correct Horse Battery Staple: 72 bits of entropy. Enter "Correct H" into google. When it generates the phrase, that's
    12. Re: Mechanical stresses ... by MickLinux · · Score: 1

      windmill power goes something like the 4th power of the blade speed. As a result, your maximumepower is harvested at the windmill blade tips. To increase the efficiency, you want maximum possible tip speed, but wear is a function of shaft speed. so you want high tip speed, low shaft speed. Therefore you need a large area.

      Or lets put it in terms of the disk plane. Harvestable wind is a function of the area of the intersected disk. If you double the radius, you quadruple the harvestable wind. Actually, you do better than that because you reach higher (with a higher wind speed), and farther from the tower (which slows the wind). So again, you want a large radius blade.And yes, long blades under extreme torsional and bending moments, at high speed IS a recipe for blade failure.

      --
      Correct Horse Battery Staple: 72 bits of entropy. Enter "Correct H" into google. When it generates the phrase, that's
    13. Re:Mechanical stresses ... by skids · · Score: 1

      There are some actual advatantages to the "large HAWT" design and also some amount of technological lock-in in the market. Actually that's an illustrative example to those expecting wave power to bootstrap faster than it is.

      Anyway the primary advantage to large turbines are the higher the altitude of the blade at the top, the stronger and more consistent the winds are up there.

    14. Re:Mechanical stresses ... by skids · · Score: 1

      Not so much. There are location-specific seasonal variations but it is more predictable and has a more reliable baseline.

      Both wave and off-shore wind suffer greatly from the transmission problem, but with off-shore wind, they get to use technology that has already been developed because it also works on land. Wave doesn't get that leg up, and still has to deal with transmission expenses.

    15. Re:Mechanical stresses ... by riverat1 · · Score: 1

      As the others explained a larger wind turbine is more efficient, not just in harnessing the wind power but also in resources used to produce it. For example one big generator instead of 100 smaller ones. Another factor is that smaller wind turbines turn faster and so kill more birds.

    16. Re:Mechanical stresses ... by GuB-42 · · Score: 1

      Tidal power works. See http://en.wikipedia.org/wiki/R... : 240MW, 48 years old, profitable
      But is is not wave power. In fact it is closer to typical hydro power (dam + turbine) than anything that can exploit wave power.

  12. Just a thought by Anonymous Coward · · Score: 0

    IMO, wave power is just too random. Tidal power is predictable, and can be harnessed both on the rise and the fall of the tides. Just think about havesting the flow of the Bay of Fundy!

    1. Re:Just a thought by Minwee · · Score: 1

      IMO, wave power is just too random. Tidal power is predictable, and can be harnessed both on the rise and the fall of the tides. Just think about havesting the flow of the Bay of Fundy!

      Yes. Just think about it.

    2. Re:Just a thought by Anonymous Coward · · Score: 0

      IMO, wave power is just too random. Tidal power is predictable, and can be harnessed both on the rise and the fall of the tides. Just think about havesting the flow of the Bay of Fundy!

      You mean, something like this?

      http://www.newswire.ca/en/story/1330495/openhydro-and-nova-scotia-partners-to-build-next-generation-tidal-energy-project-in-bay-of-fundy

  13. Too bad by DaMattster · · Score: 1

    It's a shame that the idea is not feasible. There is an awesome amount of energy that could be tapped from the ocean.

    1. Re:Too bad by bluefoxlucid · · Score: 3, Interesting

      Ocean warming is a bigger opportunity. Jabbing a thermal collector into a volcanic vent, rolling it through a sterling engine as a cooling system, with the cold side submerged in the cold ocean.

      A lot of new, green tech is ludicrous. People want solar farms in the desert because of all the arid heat and lack of clouds, but discount the fragile ecosystem. Wind farms take up much more space than nuclear plants for the same power output. Hydrogen is difficult to store without supercooling, and is only a storage scheme and not a generation scheme, and only operates at 50%-80% efficiency. Hydroelectric is an environmental disaster.

      Direct heat applications from solar-thermal water heating are about the only thing that make sense. Their efficiency is high, and their cost is low. A small, 1.2 square meter collector provides 3000BTU/hr, about 85% of a kW; I can fit over 20 of these on my roof at a sun-receiving angle and spacing, giving over 65,000 BTU/hr average throughout the day. My roof can produce 19kW of heat output, while I only need 3kW to stay warm or cool--the AC breaker is 30A, providing about 3kW of cooling.

      A hydronic coil off the water heater, an absorption cooler, or so on can harvest the heat collected by less than $2000 of tubes and a total of $3000 of equipment to provide for about $2500 annual air space and water heating and cooling in my house. Excess generated heat could theoretically drive a sterling engine to produce a small amount of electricity, but the investment for more tubes to generate a useful amount of electricity would be unjustifiable; I can buy 100% solar electricity for 12 cents per kWh.

      Thus, in just over a year, I can recover my investment in solar water heating by incorporating space heating and cooling, assuming I was in the market for a new furnace and air conditioner anyway--the furnace would be an air handler with electric back-up, vastly cheaper than a new gas furnace, offsetting the expensive absorption chiller. A $900 pellet stove would serve as a back-up. Overall, the setup would save an immense amount of electricity and natural gas.

    2. Re:Too bad by Anonymous Coward · · Score: 0

      TFA doesn't say the idea is not feasible. What they say is that, since current designs are not cost competitive with (presumably temporarily) extremely cheap natural gas, it makes sense to hold off deploying 1st gen designs and instead work on improving the designs so that when natural gas prices rise they will be in a better position.

    3. Re:Too bad by Anonymous Coward · · Score: 0

      My AC is 4.5 kW and it's not a big unit. Are you sure that 30A isn't at 240V, which means the load is a lot closer to 7 kW?

    4. Re:Too bad by Anonymous Coward · · Score: 0

      Ocean warming is a bigger opportunity. Jabbing a thermal collector into a volcanic vent, rolling it through a sterling engine as a cooling system, with the cold side submerged in the cold ocean.

      The ecosystems around volcanic vents are poorly understood but likely to be fairly unique to each vent, so destroying them now before they have been studied seems shortsighted. Some of the microbes there seem to have quite unusual metabolic pathways that merit study. There is probably more merit on just using the heat difference (and this has been talked about for 50 years) in using temperature differences between surface waters and that around 200m down, not least because it is more scalable as there are few vents, but also easier to engineer (on the surface, not in the deep ocean).

      Wind farms take up much more space than nuclear plants for the same power output.

      It's not so much of an issue of they are offshore as there are no offshore nuclear plants. Also wind turbines can be placed alongside existing features which are already built up in some way - e.g. along highways. It's a wedge of useful power generation.

      Hydrogen is difficult to store without supercooling, and is only a storage scheme and not a generation scheme, and only operates at 50%-80% efficiency.

      If it can be combined with nitrogen to form ammonia it might be easier to store, or be useful as a feedstock for industrial or agricultural processes, or as a feedstock of creating liquid fuels for vehicles.

      Direct heat applications from solar-thermal water heating are about the only thing that make sense. Their efficiency is high, and their cost is low.

      These do make a lot of sense and it's basically just advanced plumbing so no reason these shouldn't be standard on any new house or office building or hotel. I am a big fan of solar thermal due to the fact that a reservoir of hot water in a well insulated tank is good storage from one day to the next for a hot morning shower, or preheated water for washing (although most washers now take cold rather than hot, which seems a retrograde step).

    5. Re:Too bad by skids · · Score: 1

      The solar water heating vendors spent decades charging "what the market would bear" instead of competitively expanding/economizing. At this rate a heat pump and a solar panel may economically pass them up before they can.

    6. Re:Too bad by skids · · Score: 1

      There are a number of math problems here. First AC (Alternating Current not Air Conditioner :-) watts are not DC watts. They are DC
      watts over (the square root of two.) So when converting from a DC value like BTU/hr you need to factor that in. Assuming a power
      factor of 1, the actual equivalent DC watts of the air conditioner is about 2.5K (8500ish BTU), and will actually be less because the power factor will
      be less than 1 for the type of motors used in an air conditioner.

      Secondly Heat != electricity unless you are using a resistive device. You don't compare them kWH to kWH, there's a
      COP involved though usually a SEER is used when talking HVAC. This COP will be well over 1, as you can move way more than 1kWH of heat with 1kWH of electricity; often several times more, but it depends on the temperatures involved. If you have a heat ballast like a ground source loop attached to a heat pump that boosts the COP dramatically.

    7. Re:Too bad by skids · · Score: 1

      That fact won't stop the people who want to spew uninformed rhetoric, sadly.

    8. Re:Too bad by radl33t · · Score: 1

      Solar thermal is awesome, but limited and it is not or likely to be a viable solution for cooling. You get a COPc of 0.6 to 0.8 out of a sorption chiller powered by 160F hot water. That is 5 to 10 times less than than the SEER 13+ AC running on your 30A breaker; aka your 3kW cooling demand becomes 15+kW when accounting for the inefficient sorption cycle. Also that absorption chiller is expensive and has no where near the reliability of a sealed electric compressor.

      There is no utility for 60,000 BTU/hr of 160F water in residential housing.
      insulation and efficient, climate appropriate glazing would obviate the need for most of those collectors, and all of them without significant (~weekly) thermal storage
      PV + AC/HP = more efficient
      PV + AC/HP = cheaper
      PV = more flexible and useful
      PV = grid connected Even if you aren't compensated for putting power back on the grid at least that power can be used! You fail to mention how much of that solar thermal energy would simply be wasted (shoulder seasons, summer overheating) because you have no use for it. Without a gigantic seasonal (and expensive) thermal storage you would probably throw away the majority of your collected energy, which would significantly diminish operating efficiency.

      A last note on Stirling technology. While capable of extremely impressive feats with a dT of 600C, it's useless without high temperatures, aka large concentrating systems. There can not compete with PV in cost or efficiency at non-concentrating solar thermal temperatures.

    9. Re:Too bad by radl33t · · Score: 1

      AFIK, they already have passed them up. It is unfortunate that $300 can buy you integrated solar collector/storage in China and you would be lucky to get a comparable system for 10x that price here.

    10. Re:Too bad by bluefoxlucid · · Score: 1

      Really? Because the installation of an AC and heat pump here is expensive, and the heat pump is wildly inefficient in the winter. It's good for the temperate season in the spring and fall, a total of about 3 months per year; there's 4-5 solid months where a heat pump trying to heat my house is either ineffective or a huge energy hog pulling in tons of electricity per unit heating. My most efficient option has been using a space heater in whatever room I'm in, keeping the rest of the house at 62F; otherwise I spend $300+ per month on natural gas at 1,400,000 BTU for my 1300sqft house.

      You fail to mention how much of that solar thermal energy would simply be wasted (shoulder seasons, summer overheating) because you have no use for it.

      I did mention the use of more efficient (20%-30% vs 14%-19%) sterling heat engines for power generation, but figure you'd use most of the heat directly and get little benefit. Sure, with a dT of 600C, you can pull 38% or even as high as 42% on a sterling engine; but at 300C vs 10C, you're going to get 20%, maybe 25%.

      Solar hot water systems tend to heat the 150L tank to a maximum 190F before shutting down, in the first 2-3 hours of the day; a thermostatic mixing valve provides 120F-130F off the tank. This allows for less hot water usage when the water is hot, and stable temperature as the water cools, as people take showers at night or in the morning. Residential evacuated tubes have boiled coolant at temperatures as high as 350C in unusual conditions, but are commonly accepted to run as hot as 300C, and typically don't exceed 285C. It's considerable that a system running less than 5L of water in a loop can heat 150L to almost 90C from tap cold (10C) in under 4 hours.

      In practice, people have a single 1.2m^2 panel here, running their hot water at 160F in the winter with short days, not quite enough to use hydronic heat. 2-4 panels would do it, at $500 each, with proper insulation.

    11. Re:Too bad by bluefoxlucid · · Score: 1

      Oh, and this absorption chiller seems to provide 76% efficiency, versus 320% for a regular AC; but the cost is comparable, such that a $1500 unit would supply the same cooling.

      Where I live, gas (heat) powered air conditioners cost less during the season to operate than electric ones.

    12. Re:Too bad by radl33t · · Score: 1

      Air source heat pumps are useless at the dead of winter in my climate too (-22F design temp), but they are improving and new techniques for shallow group coupling are getting cheaper and vastly improve their performance. No reason you can't couple it to your solar thermal system to boost the COP while maintaining peak solar thermal efficiency, as well. If an AC/HP retrofit is more expensive than alternatives, that sounds like an issue with your local labor market. I'm pretty sure solar thermal installs are more expensive than AC installs in most US markets.

      There will be no cost-competitive low-temperature solar thermal Stirling engines.

      Per the comment on single-room resistance heating. That is a great solution, but it seems like your house also needs efficiency improvements. Cost effective energy efficiency can take loads down 40-70%.

      Also something is wrong with your #s. I pay $0.5 - $1 / therm (100k btu) and use 80 therm in Jan. to heat my moderately energy efficient home, which means I use 6x your energy, but my energy cost is 20-40 times cheaper. 140 therm for 1300ft sq seems ok for a cold climate, but that implies your gas prices are unusually high for the US, which I presume from the units.

    13. Re:Too bad by radl33t · · Score: 1

      That isn't residential ( I would be surprised if it scaled smaller sizes) and it looks like an academic prototype. Regardless 0.75 is good for single effect unit. Of course, this thing has to hit the design condition in cloudy and humid weather or you also need an AC.

    14. Re:Too bad by bluefoxlucid · · Score: 1

      Coupling to solar thermal is a viable idea. Hmm....

  14. This is a good thing. by synaptik · · Score: 2

    Had they been successful, they would have slingshotted the moon further away from us. Oh, the calamity!

    --
    HSJ$$*&#^!#+++ATH0
    NO CARRIER
    1. Re:This is a good thing. by skids · · Score: 1

      A) Waves are from wind, not the moon.
      B) Even with tidal energy you have no sense of proportion as to the scale of the energies involved.
      C) The effect would have been opposite what you state.

      The moon will slingshot away as is, were we to draw enough energy (impossible), this would keep it, but it would also slow the earth's rotation so then our days would be a month long and we'd be toast.

    2. Re:This is a good thing. by synaptik · · Score: 1

      A) Yes, I realized this after my haste to make the joke.
      B) You have clearly missed that this was supposed to be a joke.
      C) Had this story actually been about tides and not wind (see A above,) then I would be right: retarding the tidal bulges even more than they already are (via harnessing) would slingshot the moon even faster than the tides currently do.

      --
      HSJ$$*&#^!#+++ATH0
      NO CARRIER
  15. Hold the front page... I have a new headline... by OliWarner · · Score: 1

    BUILDING IN OCEANS EXPENSIVE

    But seriously, this has always been the case. It costs you ten to a thousand times the amount to build something in the sea than it does on land (depending on depth) and then there's the human cost of maintaining it.

    I'm certainly not saying it's impossible or undesirable, it just hasn't reached the point where technology and our abilities make it worth doing yet. And this isn't a chicken vs egg issue. Even without building tidal turbine systems, people are still doing underwater engineering. Progress is still being made.

  16. Re:Wave power can work by Pope · · Score: 1

    Markets, by definition, are artificial to begin with; very few are actually 'free'.

    --
    It doesn't mean much now, it's built for the future.
  17. Insert your favorite alternative energy here... by spud_boy_65986534 · · Score: 1

    Apparently the economics of ___________ just don't make sense yet.

  18. Don't need blades by Anonymous Coward · · Score: 0

    As discussed in this article, turbines are not required to harvest ocean energy. Some approaches can scale from small to large installations.

  19. Tidal power in Maine by Anonymous Coward · · Score: 0

    There's a pilot tidal power project in Northern Maine, which is also in the Bay of Fundy.

    http://www.orpc.co/content.aspx?p=h3jCHHn6gcg%3D

  20. So stoked, dude by zumajim · · Score: 1

    Surfers the world over are happy that the threat of power plants hogging their tasty waves isn't quite as gnarly now.

  21. Promise? by MrL0G1C · · Score: 1

    What promise? No-one promised me anything.

    Technology in it's infancy fails to wipe the floor with technologies that have had literally $Trillions of investment. Not really surprising.

    --
    Waterfox - a Firefox fork with legacy extension support, security updates and better privacy by default.
    1. Re:Promise? by Noah+Haders · · Score: 0

      what are STrillions?

  22. Re:Wave power can work by itzly · · Score: 1

    And if they were actually free, you'd probably hate being the one sold as a slave.

  23. So... by Anonymous Coward · · Score: 0

    ...how much did they take us for?

  24. After sucking up investor's cash and incentives... by Squidlips · · Score: 1

    Sorry folks, we peed away all your cash and government incentives and it is too expensive to actually produce anything ....so please invest more so that we can do more R&D

  25. "with natural gas prices still so low..." by Squidlips · · Score: 1

    Why aren't those low prices passed on to consumers? The wholesale cost of electricity has dropped 50%, but our rates have not....

    1. Re:"with natural gas prices still so low..." by jonwil · · Score: 1

      Blame the high cost of maintaining (and upgrading) the poles and wires used to get the electricity from where its generated to where its used. (and the need to engineer that infrastructure to handle the highest possible forecast demand)

  26. Nothing new here by Anonymous Coward · · Score: 0

    I recall reading 40 years ago how someone from the early 1900's looked at recovery power from wave/tide action. The results of the analysis showed that maintanence cost from the harsh environment (including fouling by organisms) made it un-economical. Seems that nothing has changed really.

  27. There Ain't No Such Thing As A Free Market by Catbeller · · Score: 1

    If the economics of oil is in the way, then stop subsidizing oil production with tax breaks and two-trillion dollar wars of oil field conquest. Tax the shit out of them. Alt energy has to make a profit in the shadow of trillions of dollars propping up the oil infrastructure - taxpayer funded. They work in a "free" market while oil companies have marines guarding their wells.

  28. Economics of Renewable Energy by brownshoe · · Score: 1

    "Apparently the economics of wave power just don't make sense yet." Shocker... the economics of renewable energy in general makes little economic sense.

    1. Re:Economics of Renewable Energy by brantondaveperson · · Score: 1

      As opposed to the economics of non-renewable energy, which makes perfect sense?

  29. What Promise? by Mr+D+from+63 · · Score: 1

    Wave Power Fails to live up to Promise

    The problem is more with the promise than with the technology. Only those who bought into the hype are disappointed....and the beat goes on.

  30. Apparently the economics of wave power. by MrKaos · · Score: 2
    OR the conservative Australian government has been busy undermining the investments that fund their R&D. The conservative governments in Australia have a long history of undermining future investments and gear their election promises to the older generation of baby boomers.

    They have rapidly turned Australia from leaders in renewable energy to followers.

    --
    My ism, it's full of beliefs.
  31. Re:Wave power can work by TapeCutter · · Score: 1

    The slave trade would not have existed without property law. A market that is free of regulation is an oxymoron, what the "free" in free market actually means is that anybody can participate in the market, nothing to do with the type or number of rules that make the market possible.

    --
    And did you exchange a walk on part in the war for a lead role in a cage? - Pink Floyd.
  32. Re: Wave power can work by MickLinux · · Score: 1

    Which regresses to the point that very few markets are actually free; most are very specific about who the priveleged are that can benefit. Fishing fleets, taxicab owners, rocket sales, X-prize contest (anyone could compete, the unfavored had to compete without fuel) also grocery store workers, teachers, medicine, and so on.

    Don't forget that you don't have the right to trade your labor across 'free trade' borders; that right belongs to companies that you must pay for the privelege of having your products and services be traded.

    And no, even with non-free markets, it feels lousy to be the slave who is sold.

    oh, did I mention that as billionaires are unloading stocks, AND volume is at a low, company buybacks are at an all-time high?

    And no, even with non-free markets, it feels terrible to be the slave who is sold.

    --
    Correct Horse Battery Staple: 72 bits of entropy. Enter "Correct H" into google. When it generates the phrase, that's
  33. A world frist? by Anonymous Coward · · Score: 0

    The first ones were of the coast of Portugal, but in the American view of the world, Portugal doesn't exist.
    http://www.pelamiswave.com/

  34. There are no free market by Anonymous Coward · · Score: 0

    All market are bound and manipulated by local laws and interest. What you have are capitalistic market which have an orientation, are the market more geared toward protection of the entrenched, more geared toward allowing new comer etc.... But free market is as much an illusion as true communism : a goal that nobody practice.

  35. Sacrificial Anode by DarthVain · · Score: 1

    All one has to do is check out a sacrificial anode that has been attached to a boat motor for a few years in salt water to get an idea of how damaging saltwater can be to things.

    Parents bought a salt water speed boat (we used it in a freshwater lake). It has a sacrificial anode (I had to look up what it was actually called) attached to the shaft of the prop. In the most basic sense it attracts the corrosion from the saltwater sacrificing itself in favor of preserving those more important bits around it.

    Ours was a rectangular bar that looked like someone had subjected it to acid that had eaten a large chunk of it away.

    1. Re:Sacrificial Anode by MightyYar · · Score: 1

      In salt water boating, we replace those regularly :)

      --
      W..w..W - Willy Waterloo washes Warren Wiggins who is washing Waldo Woo.
  36. Winter Salt by DarthVain · · Score: 1

    Another example that is non-metallic, all those structures will require things like concrete moorings and the like. There is a reason why you are not supposed to throw salt on your concrete steps in the winter. Now subject it non-stop and engulfed, and in addition fill it with metallic bits for re-bar...

    Not to mention the construction costs where just staying level, and not moving is difficult or your workforce has to wear flippers and oxy tanks...

  37. maintenance stresses ... by DarthVain · · Score: 1

    There are a few operating tidal power plants in the world (three I think). One of them is in Nova Scotia. It has been there since the 70's. It works, however it is Tidal power, which is different than Wave power. The proven Tidal power uses Barrage Dams, which basically at high tide stores the water, and at low tide generates power by releasing it through turbines.

    However, it was expensive to build, took longer, cost more (which isn't unheard of for any energy project, but I got the impression that it was a lot more), none of them produce all that much power either in comparison to other sources. In addition, just like Hydro power (which this essentially is but with tides), you are limited to building it in only certain areas where A) There are BIG tides, and B) In the mouth of a natural estuary etc... both of which are physically limited.

    There are of course experimental underwater turbines (which is probably what that was), where you simply drop it in the water, and the tidal current does the work. However it's inherent flaw is that the entire structure is underwater. Which unless it it totally maintenance free (which if you are talking about submerged metallic machinery with moving parts in saltwater, never will be), is going to be pretty unfeasible no mater what you do for any period of time.

  38. Re:Wave power can work by Archangel+Michael · · Score: 1

    Ahhh, the good old Strawman from leftwingnut crowd.

    --
    Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.
  39. Re:Wave power can work by Archangel+Michael · · Score: 1

    Slave trade exists only where people are considered property. We (the western world) are existing in a "slave" market, where the owners take from the sweat of supposedly "free" people (in the form of "Feudal taxes") not by consent, but by threat of government guns. We've only traded one type of owner for another. The only difference is we supposedly elect our kings and queens, rather than have them born into royalty.

    We aren't free.

    --
    Agent K: A *person* is smart. People are dumb, stupid, panicky animals, and you know it.