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Solyndra's Thin-Film Solar Cells Draw $1.2 Billion In Orders

SolarSells writes "Solyndra makes funky-looking cylindrical solar cells that resemble compact fluorescent lightbulbs. Their products are meant for office buildings, and are made from a thin coating of copper indium gallium diselenide on glass tubes. Although they might not be able to fill them till 2012, the company has already received $1.2 billion in orders. Their manufacturing tricks make the cells so cheap that they may be competitive with other forms of power even after solar subsidies are phased out."

131 comments

  1. Bright idea by Smivs · · Score: 3, Funny

    Look like fluorescent lights? Great, just install one next to each lamp and it can power itself. Oh, hang on, that won't work, will it? DOH!

    1. Re:Bright idea by Anonymous Coward · · Score: 0

      Perhaps you could install them in the directions you don't need light (or maybe just use them as wallpaper...expensive wallpaper) to make the lamps more efficient.

    2. Re:Bright idea by 4D6963 · · Score: 1

      Or paint your walls white. Or cover them with mirrors.

      --
      You just got troll'd!
  2. Glass tubes? by bdenton42 · · Score: 3, Interesting

    So a good hailstorm will demolish your solar array?

    1. Re:Glass tubes? by X0563511 · · Score: 5, Insightful

      Just like they demolish your home's windows, and your car's windshield....

      --
      For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
    2. Re:Glass tubes? by Erioll · · Score: 2, Interesting

      Very true, but there are also a lot of places in the world (and even in the USA) where hail is virtually unknown, so for those markets it'd work.

      But yes, that definitely wouldn't be where I live, as we get hail multiple times per year. Those things would get massacred up here.

    3. Re:Glass tubes? by bdenton42 · · Score: 2, Interesting

      If those tubes are as thick as my cars windshield that would be fine... but I'm guessing they are not.

      As far as my home's windows they would certainly be a lot more vulnerable to hail if they were also mounted horizontally.

    4. Re:Glass tubes? by ozphx · · Score: 1

      Hey, I've got an idea. We'll put whatever crap we put over existing solar panels above them?

      Bet nobody thought of that ingenious trick!

      Some thicker glass... coming out the top of the array there. Oh yeah that looks really good. Check out all its MAJESTY.

      --
      3laws: No freebies, no backsies, GTFO.
    5. Re:Glass tubes? by DigiShaman · · Score: 0, Redundant

      Just like they demolish your home's windows, and your car's windshield....

      Are they just as cheap to replace?

      --
      Life is not for the lazy.
    6. Re:Glass tubes? by Hairy+Heron · · Score: 0, Flamebait

      Yeah because no one probably ever thought of putting protection up for these solar arrays for situations like that. Good thing we had you around so that you could point out this problem that no one else in the rest of the world ever thought of.

    7. Re:Glass tubes? by ApharmdB · · Score: 2, Insightful

      Since when are home windows and car windshields cheap to replace?

    8. Re:Glass tubes? by chill · · Score: 2, Funny

      Meh. Thicker glass will still break. Try plywood. We use it to cover windows in hurricanes and big storms and it works great!

      --
      Learning HOW to think is more important than learning WHAT to think.
    9. Re:Glass tubes? by zippthorne · · Score: 1, Insightful

      The windshield does not represent the majority of the value of the car, nor do windows represent a majority of the value of the home, such that you end up buying a new car or new home every hail storm.

      Solar cells do represent the majority of the cost of solar cells, though, so hail damage basically == full replacement. IOW, they have to completely pay themselves off between hail storms to break even*

      *if they are insufficiently protected from the elements, that is.

      --
      Can you be Even More Awesome?!
    10. Re:Glass tubes? by GodKingAmit · · Score: 0, Redundant
      Sounds like a good idea to cover solar cells with plywood.

      What's the optical transparency of playwood again?

      Oh wait.

    11. Re:Glass tubes? by Muad'Dave · · Score: 2, Funny

      Call Scotty - he's got the bloody formula for transparent plywood on his Mac Classic.

      --
      Tiller's Rule: Never use a word in written form that you've only heard and never read. You will end up looking foolish.
    12. Re:Glass tubes? by chill · · Score: 1

      *whoosh*

      "That there's a joke son! You're supposed to laugh! Went right by ya!" -Foghorn Leghorn

      --
      Learning HOW to think is more important than learning WHAT to think.
    13. Re:Glass tubes? by Skrapion · · Score: 2, Insightful

      The windshield does not represent the majority of the value of the car, nor do windows represent a majority of the value of the home, such that you end up buying a new car or new home every hail storm.

      I don't know about you, but I'd rather pay for the full replacement of a drinking glass than pay to have a windshield replaced.

      Whether or not it's a full replacement is a pretty meaningless distinction.

      --
      The details are trivial and useless; The reasons, as always, purely human ones.
    14. Re:Glass tubes? by Skrapion · · Score: 1

      What on Earth are you talking about? People don't leave plywood on their windows after the storm passes, so why are you assuming they would leave it on their solar cells after the storm passes?

      You should probably try to say something intelligent if you're going to be condescending to somebody. Not being condescending at all is another good option.

      --
      The details are trivial and useless; The reasons, as always, purely human ones.
    15. Re:Glass tubes? by Khyber · · Score: 1

      Glass eats light. Covering a solar cell with glass reduces its efficiency. I've had to prove this time and time again in gardening forums with light meters and varying panes of glass. Even "clear" glass isn't truly clear.

      I'd rather use something with more optical transparency, like Lexan.

      --
      Still waiting on Serviscope_minor to wake up to fucking reality and realize that Jessica Price isn't going to fuck him.
    16. Re:Glass tubes? by confused+one · · Score: 1

      A sudden hailstorm looks like it would be a problem -- you'd lose a number of tubes. However, if you have time to respond... I would like to think the tubes are sturdier than they look. It does appears the tubes have endcaps not unlike the single pin flourescent tubes. A maintenance team could pull the tubes in advance of an approaching storm system and put them into protected storage, then re-insert them once the storm was past.

    17. Re:Glass tubes? by X0563511 · · Score: 1

      I'm sure you could mount something up there like what they use to close some shop doors/windows - like Venetian blinds but made of metal. Flip a switch and a motor deploys the shield. Flip the switch back and it retracts the shield. Or, you could do it the old fashioned way of a chain-pulley system.

      --
      For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
    18. Re:Glass tubes? by SevenHands · · Score: 1

      The article states that these solar tubes can be constructed from metal also...

    19. Re:Glass tubes? by solyndra08 · · Score: 4, Informative

      I work as a process engineer Solyndra, I don't know if it is right for me to comment on this or not, but fighting bogosity is my hobby. Of course we did hail tests, I was involved. We shot homemade hail iceball out of a painball gun at our panels and confirmed that they could survive. Our panels have already been through hailstorms around the world. No tube breaks due to hail.

    20. Re:Glass tubes? by GaryOlson · · Score: 1

      We shot homemade hail iceball out of a painball gun at our panels...

      That sounds like too much fun to get paid...

      Did you happen to increase the mass of the projectile till you actually broke a tube? One time, a less than competent machinist rammed a large machine tool into a very large material chuck spinning at 5000 RPM. A 15lb steel clamp block ejected thru the "safety glass" window, thru the false ceiling, and thru the roof to land on the building next door. Would your tubes have survived such an industrial mishap? (just curious)

      --
      Every mans' island needs an ocean; choose your ocean carefully.
    21. Re:Glass tubes? by Anonymous Coward · · Score: 0

      Very true, but there are also a lot of places in the world (and even in the USA) where hail is virtually unknown

      For now.

    22. Re:Glass tubes? by bdenton42 · · Score: 1

      No it's always great to have facts over random speculation :-)</p><p>My original comment was from the assumption that it was thin glass tubes like CFL or perhaps window glass. How thick is the glass? Is there some coating over it to protect it?</p>

    23. Re:Glass tubes? by iainl · · Score: 1

      What's the solar influx to these cells during a hailstorm, again? Covering them during a storm big enough to be dangerous doesn't sound like it loses you much.

      --
      "I Know You Are But What Am I?"
    24. Re:Glass tubes? by LWATCDR · · Score: 1

      Well window very rarely take the impact from hail. The are protected by the roof and are vertical.
      You cars windshield is safety glass and is very thick.
      Do you know for a fact that these tubes are as strong as a car windshield?
      Or are just posting a none fact to a valid question.

      --
      See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.
    25. Re:Glass tubes? by LWATCDR · · Score: 2, Interesting

      Up to what size hail?
      Not an issue where I live since we don't have a lot of big hail.
      Asking the question is not bogosity giving an answer with out facts is.
      Since it looks like you are the only one here that has any facts thank you for the answer.

      --
      See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.
    26. Re:Glass tubes? by X0563511 · · Score: 1

      Basically you called me. But a later reply from me indeed invalidated this concern... there's no reason one of those metal roll-up rails can't be installed above the tubes. Or something similar. The parent assumes the tubes will be mounted naked - which would be absurd.

      --
      For large sets, this will be our guide even unto death, for the LORD will work for each type of data it is applied to...
    27. Re:Glass tubes? by LWATCDR · · Score: 2, Interesting

      Actually nope your wrong again.
      someone from the company posted that they did test it for hail. They didn't give any real info about the hail size that they tested too but since this guy says they used a paint ball gun it is not very large.
      So nope they do attend to mount them naked from what the guy from the company posted.

      --
      See my blog http://ilovecookes.blogspot.com/ for light hearted technical information.
    28. Re:Glass tubes? by konohitowa · · Score: 1

      I was going to give the humor impaired dude some crap, but you defend yourself way better than I ever could. Although I am stuck with some obnoxious FHLH (as opposed to FLCL I suppose) quotes running through my head now. "Looks like sody pop. Watch it fizz."

  3. Good by Eddy+Luten · · Score: 4, Insightful

    It's good to see that people still invest in alternative sources of energy. $1.2B in pre-orders can't be bad and (I think) shows a great sign of faith in these technologies.

    1. Re:Good by sexconker · · Score: 0

      It's not investing.

      "Their manufacturing tricks make the cells so cheap that they may be competitive with other forms of power even after solar subsidies are phased out."

      These babies can't compete without the government giving them an advantage.

    2. Re:Good by Tim+Doran · · Score: 1

      Right - unlike the mainstream energy sources (oil, coal, nuclear) which toil day in and day out, competing to power our lifestyles without any love from the government.

    3. Re:Good by Anonymous Coward · · Score: 0

      Can anyone say 'American closed market'?

      Or better yet - one of you lopsided 'Free trade agreements'?

    4. Re:Good by Waffle+Iron · · Score: 1

      These babies can't compete without the government giving them an advantage.

      Just like fossil fuels wouldn't be able to compete if their external costs were appropriately assigned to them, and nuclear power couldn't compete if plant operators had to buy liability insurance at actual market rates.

    5. Re:Good by OldeTimeGeek · · Score: 4, Informative

      Yeah, it's not as though nuclear power or oil or coal companies have come to the Congress with their hands held out, is it?

    6. Re:Good by Anonymous Coward · · Score: 1, Informative

      Nope, it's just that solar and wind get an order of magnitude more subsidies, and a shitton less regulation.

    7. Re:Good by sexconker · · Score: 1

      Fossils fuels currently have no real competition, silly. Nor would they have if they had cost 10 times what the did during the industrial revolution.

      Please, show me how you would appropriately assign their external costs to them.

      Liability insurance? Market rates?
      Insurers would compete to insure a nuclear plant. It's safe, clean power. Insurers compete using tons of statistical data and analysis.

      Men pay more for car insurance even though statistically women are worse drivers. Men end up paying more because, statistically, the average man drives more miles/hours than the average woman, and this end up winning out. Insurance companies DO compete. Rates for men and women have been converging (more so in auto than in health so far) due to woman driving more, working more, getting sick more, etc.

    8. Re:Good by sexconker · · Score: 1

      Who doesn't ask for money from congress?
      I'd be willing to fund something that exists, is proven, and powers the damned country more than I'd be willing to fund some pie-in-the-sky never-fulfill-our-promises alternative form of energy.

      The alternative forms of energy gets TONS more money anyway, with far less regulation, and almost ZERO requirement of actually doing anything useful.

    9. Re:Good by b0bby · · Score: 1

      The alternative forms of energy gets TONS more money anyway, with far less regulation, and almost ZERO requirement of actually doing anything useful.

      From this:
      http://en.wikipedia.org/wiki/Energy_Policy_Act_of_2005
      I'd say that Nuclear & fossil get $7.1 billion, while all renewables + conservation get $7.4 billion; not tons more, and not an order of magnitude as the AC above suggests.
      If the charts on this page are to believed:
      http://nextbigfuture.com/2008/09/us-energy-subsidies-updated.html
      then the share of money over the period 1950-2006 devoted to renewables comes to 6%.

    10. Re:Good by Anonymous Coward · · Score: 0

      Not sure if your "statistic" is true, I guess you just believe it because you like it, but even if it is, it is irrelevant. Insurance rate is based on the amount you'll probably cost to them. They don't care about the "why".

      A little bit more to the point you were replying, the most important of those external costs is not insurance, but problems associated with pollution, particularly for oil. Those problems go from simple health problems to everything related to global warming. That means from more frequent destructive extreme weather to future war that will be caused because of water problems due to weather changing (or simply for war because of need for oil in the first place).

      My guess is if oil companies had to pay for those cost (according to their share of responsability) instead of governments, solar power and about every other clean energy would be a lot cheaper than oil.

    11. Re:Good by Waffle+Iron · · Score: 1

      Please, show me how you would appropriately assign their external costs to them.

      Well, for starteers, assign most of the cost of our military to oil, since their main job is to keep volatile parts of the world stable enough to ship oil to us.

      Then, assign the cost of cleaning up mercury pollution in most of the nation's lakes and treating a good percentage of repiratory illnesses to coal.

      The list goes on and on, and that's not even assuming that serious climate change scenarios may transpire. If you allow for those, multiply everything above by orders of magnitude to cover the costs of either huge catastrophes or massive geoengineering fixes.

      Of course all of that is hard to quantify, but it doesn't change the objective reality that large external costs exist which are not currently being accounted for.

      Insurers compete using tons of statistical data and analysis.

      Apparently, they did this analysis and then concluded only the government would dare underwrite the astronomical potential liability risk for a nuclear power plant. At any rate, if a few foreclosures can bankrupt the largest private insurer in the USA, then there's no way in hell that any private firm could cover the losses of a worst-case nuclear accident or sabotage scenario. There would never be any payout, which reminds me of the old Monty Python skit about the guy who was refused payment for loss of his car because he had bought the "No Claims Policy".

    12. Re:Good by sexconker · · Score: 1

      The vast majority gets less than the small minority.
      What sense does that make?

      Nuclear and fossil deliver.

      Measure that shit in net $/kWH delivered, and then we'll talk.

    13. Re:Good by sexconker · · Score: 1

      Well, for starteers, assign most of the cost of our military to oil

      I stopped reading there.

      Nutjob confirmed.

    14. Re:Good by Waffle+Iron · · Score: 1

      I stopped reading there.

      Your loss. You might have learned something.

      Instead, when you saw that you might be confronted with information that doesn't neatly fit with your preconceptions, you stick your fingers in your ears and yell "Nyah, nyah, I can't hear you!"

    15. Re:Good by sexconker · · Score: 1

      What?

    16. Re:Good by jimdread · · Score: 1

      Well, for starteers, assign most of the cost of our military to oil, since their main job is to keep volatile parts of the world stable enough to ship oil to us. Then, assign the cost of cleaning up mercury pollution in most of the nation's lakes and treating a good percentage of repiratory illnesses to coal.

      You've calculated your costs of using fossil fuels. Let's call the costs C. Now add up the benefits of using fossil fuel. Let's call that B. Therefore, your net benefit from using fossil fuels is NB = B - C. Do you think that NB is positive or negative? I think it's positive. In other words, using fossil fuels is overall good for humanity.

      There are a lot of people who seem to want everybody else to change their behavior, such as by not using fossil fuels any more. Why would people stop using fossil fuels when they receive a net benefit from using them?

      Secondly, the best way to get people to stop doing something is not to hector, berate, and frighten them into stopping. It's to give them something better to do. People stopped using whale oil in their lamps because something better came along. They didn't just turn their lamps off and say "Oh well, we have to sit in the dark now because otherwise whales will go extinct".

      That's why it's much better to put your energy into developing alternatives to things you don't like. Like Solyndra thin film solar cells for example. Making those solar panels might well cause a decrease in fossil fuel usage. Global warming campaigns use politics and fear to try to change things. Much better to use technology, science, and engineering to provide alternatives that are better all around.

    17. Re:Good by i_b_don · · Score: 1

      "most of the cost to military to oil" is a bit of a stretch... but the cost of the iraq war would be a valid claim. You think we'd give two shakes of a rats ass about iraq if it weren't for oil? i think not.

      d

      --
      all language nazi's will burne in heil!
    18. Re:Good by Halo1 · · Score: 1

      Nope, it's just that solar and wind get an order of magnitude more subsidies

      At least in Europe that's not true (Dutch, and also in French).

      That table shows, from left to right, European subsidies to energy production based on resp. fossil fuels, nuclear power and renewable energy. Vertically, the rows read "money transfers and fiscal support", "non-internalised external costs", "transfer of past subsidies", "preferential treatment", and "total".

      It's based on numbers from 2001 and I guess in the mean time the fiscal support for alternative energy has increased significantly, but then again it's got quite a bit to make up for...

      --
      Donate free food here
    19. Re:Good by Halo1 · · Score: 1

      If you add up all subsidies from the past for fossil/nuclear, sure.

      --
      Donate free food here
    20. Re:Good by Anonymous Coward · · Score: 0

      "The Japanese military, deeply engaged in the seemingly endless war it had started against China in mid-1937, badly needed oil and other raw materials. Commercial access to these was gradually curtailed as the conquests continued. In July 1941 the Western powers effectively halted trade with Japan. From then on, as the desperate Japanese schemed to seize the oil and mineral-rich East Indies and Southeast Asia, a Pacific war was virtually inevitable." here.

      "Japan had to import steel and oil from the US, or get it from Southeast Asia and Pacific. The US protected the Pacific, and would not sell them the steel and particularly the oil, Japan needed. They found themselves at a point of no return- either attack the US while they still had oil to use, or in a year their navy would not have enough oil to fight. They decided not to give up their dream of possessing the resouces of East Asia/Pacific area, so found no way out but to attack the USA." more here.

      "When France capitulated in June 1940, Japan moved into northern French Indochina. And though the United States had no interest there, we imposed an embargo on steel and scrap metal. After Hitler invaded Russia in June 1941, Japan moved into southern Indochina. FDR ordered all Japanese assets frozen.

      But FDR did not want to cut off oil. As he told his Cabinet on July 18, an embargo meant war, for that would force oil-starved Japan to seize the oil fields of the Dutch East Indies. But a State Department lawyer named Dean Acheson drew up the sanctions in such a way as to block any Japanese purchases of U.S. oil. By the time FDR found out, in September, he could not back down.

      Tokyo was now split between a War Party and a Peace Party, with the latter in power. Prime Minister Konoye called in Ambassador Joseph Grew and secretly offered to meet FDR in Juneau or anywhere in the Pacific. According to Grew, Konoye was willing to give up Indochina and China, except a buffer region in the north to protect her from Stalin, in return for the U.S. brokering a peace with China and opening up the oil pipeline. Konoye told Grew that Emperor Hirohito knew of his initiative and was ready to give the order for Japan's retreat.

      Fearful of a "second Munich," America spurned the offer. Konoye fell from power and was replaced by Hideki Tojo. Still, war was not inevitable. U.S. diplomats prepared to offer Japan a "modus vivendi." If Japan withdrew from southern Indochina, the United States would partially lift the oil embargo. But Chiang Kai-shek became "hysterical," and his American adviser, one Owen Lattimore, intervened to abort the proposal.

      Facing a choice between death of the empire or fighting for its life, Japan decided to seize the oil fields of the Indies. And the only force capable of interfering was the U.S. fleet that FDR had conveniently moved from San Diego out to Honolulu. " more here.

      "Japan, hoping to capitalize on Germany's success in Europe, made several demands, including a steady supply of oil, from the Dutch East Indies; these talks, however, broke down in June.[79] In July, Japan seized military control of southern Indochina since it would not only put her in a better position... ( ... ) ... The United States, United Kingdom and other western governments reacted to the seizure of Indochina with a freeze on assets, while the United States (which supplied 80% of Japan's oil) responded by placing a complete oil embargo. Thus Japan was essentially forced to choose between withdrawing from Asia, or seizing the oil she needed by force; the Japanese military did not consider the former an option, and many officers considered the oil embargo an unspoken declaration of war. The Imperial General Headquarte

    21. Re:Good by sexconker · · Score: 1

      That whole Saddam thing back when Daddy Bush was in office might have had something to do with it.

      But hell, why not add in the cost of the cold war and the space program. After all, Russia's got the most recoverable oil out of anyone in the world, as well as the most natural gas, and back when they were the USSR, they had even more under their curtain, and were pushing into the middle east and pacific.

      They're just waiting for the rest of the world to burn through the middle east and then Putin will crush us all.

  4. bottom-up power by xappax · · Score: 5, Insightful

    "What Gronet envisions is solar panels installed on your average Home Depot or Ikea, generating a substantial percentage of the company's power needs right on site."

    This is the best possible outcome of the energy crisis: an efficient, sustainable, and most importantly decentralized power infrastructure. Let's hope these technologies really do take hold.

    1. Re:bottom-up power by rufus+t+firefly · · Score: 1

      This is the best possible outcome of the energy crisis: an efficient, sustainable, and most importantly decentralized power infrastructure. Let's hope these technologies really do take hold.

      Amen. I want to see a decentralized power infrastructure as much as anyone... Would also mean that EVs would be a bit more practical, assuming we roll out better energy storage technologies at the same time.

      --
      "He may look like an idiot, and talk like an idiot, but don't let that fool you. He really is an idiot." - Duck Soup
  5. Whole lotta "ifs" by Anonymous Coward · · Score: 0

    If Gronet and his team can work out the manufacturing challenges and navigate the difficult financial waters, their unique design and tightly focused business model could lead them to profitability, even after government subsidies in Europe phase out.

    Hey, that's great. Good luck with your company and all. But there is way too much "maybe" in this story to make me jump up and down with excitement.

  6. Who bought em? by Gertlex · · Score: 2, Interesting

    Aside from hype about "competing with other power sources" (it's old hype... I can't quite give a damn if it's for real or not this time), I wonder what the distribution of their clients is... (mainly by nationality)

    And I'd bet this number predates the economic crisis... I do wonder how many of these orders will be withdrawn; though I'm sure it won't be enough to slow Solyndra's production at peak capacity.

    1. Re:Who bought em? by Anonymous+Monkey · · Score: 1

      So the power grid is kind of like the poor family that can only afford a busted money pit of a car to get dad to work and back. It is always needing repairs, and ends up costing more in the long run than just buying a new car. But with out being able to get enough cash together for the new car you are stuck with the rust bucket.

      --
      We are the Borg...
  7. Link? by rufus+t+firefly · · Score: 5, Informative

    Obligatory link to manufacturer.

    --
    "He may look like an idiot, and talk like an idiot, but don't let that fool you. He really is an idiot." - Duck Soup
  8. oblig. by Rob+T+Firefly · · Score: 0, Offtopic

    Can I use a series of these tubes to power my big truck?

    1. Re:oblig. by ozphx · · Score: 2, Funny

      Ten big trucks running off that, that tube, and what happens to your own personal tube? I just the other day got... a tube was switched on by my staff at 10 o'clock in the morning on Friday. I got it yesterday. Why? Why? Because it got tangled up in a big ball with all the trucks going on the tube commercially.

      They want to deliver vast amounts of power from the tubes. And again, the tubes is not something that you just dump anything on. It's not a big internet. It's a series of wires. And if you don't understand, those wires can be filled and if they are filled, when you switch your lights on, it gets in line and it's going to be delayed by anyone that puts onto that wire enormous amounts of material, enormous amounts of material.

      --
      3laws: No freebies, no backsies, GTFO.
  9. Nanosolar by scorp1us · · Score: 5, Interesting

    While were slashvertising, let's not forget Nanodsolar which also does thin-film copper indium gallium diselenide trick. But it seems that instead of tubes, you can just get a sheet (on what appears to be a Mylar substrate).

    I wonder about the cylindrical shape, this would seem to block 50% of the surface area, where the sides and underside would produce less electricity than a flat sheet of the same area.

    --
    Slashdot's rate-of-post filter: Preventing you from posting too many great ideas at once.
    1. Re:Nanosolar by Anonymous Coward · · Score: 1, Interesting

      I wonder about the cylindrical shape, this would seem to block 50% of the surface area, where the sides and underside would produce less electricity than a flat sheet of the same area.

      Well it means that part of each cylinder is always more-or-less directly facing the sun without being moved/rotated in some way, plus you could always put a white or reflective material underneath the cylinder racks to reflect a a good portion of the missed light onto the underside of the cylinders.

    2. Re:Nanosolar by cpotoso · · Score: 1

      Nevertheless, a simple geometrical argument shows that it is ALWAYS more efficient (less amount of material used) to have a flat panel (if correctly oriented then so much better). The cylindrical shape must be a requirement of manufacturing, and they are trying to sell it as a good thing, but it is obviously not.

    3. Re:Nanosolar by oodaloop · · Score: 1

      Slashvertiseing? They're 4 years backed up on orders. I don't think they care right now about getting new ones.

      --
      Tic-Tac-Toe, Global Thermonuclear War, and relationships all have the same winning move.
    4. Re:Nanosolar by Anonymous Coward · · Score: 0

      The idea is to have the cylinders relatively broadly spaced and they will pick up reflected light off the roof as well.

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

      The cylindrical shape must be a requirement of manufacturing, and they are trying to sell it as a good thing, but it is obviously not.

      Assume much?

      Yes, if the goal was to coat the roof with a material, a flat coating would clearly be more efficient.

      But that's NOT the goal. The goal is to generate the most possible power. I'm sure surface area contributes to power delivered, but it's not necessarily the only factor.

      Consider the angle at which a photon enters the solar generating material. What if a material works best when the angle is close to perpendicular to the surface of the solar material? Still think a flat plane is clearly best?

    6. Re:Nanosolar by Jeanius · · Score: 3, Interesting

      This link says the cylindrical shape contributes to better solar absorption throughout the day, and offer less wind resistance. Looking at the picture in the article, they seem to be more like half-cylinders. That'd make sense, that while geometrically they don't have their face optimally pointed towards the sun at some optimal point during the day, they're continually pointed at the sun with some constant exposed amount of surface area.

    7. Re:Nanosolar by eagee · · Score: 1

      Hey and let's not forget Global Solar either, because they produce thin-film coppe... oh wait... that's right... the article mentions both of them... slashvertising indeed...

    8. Re:Nanosolar by Anonymous Coward · · Score: 0

      Actually, the cylinder is cheaper and more efficient, if you put a parabolic reflector underneath to concentrate the sunlight on the backside. Solar cells actually get more efficient if you use highly concentrated light, and this arrangement allows for rather expensive exotic but small and efficient cells to be used to convert the light from a comparably larger area.

    9. Re:Nanosolar by Jeanius · · Score: 1

      Sorry, they *effectively* look to be more like half-cylinders.

    10. Re:Nanosolar by Actually,+I+do+RTFA · · Score: 2, Interesting

      I wonder about the cylindrical shape, this would seem to block 50% of the surface area, where the sides and underside would produce less electricity than a flat sheet of the same area.

      It seems counterintuitive, but if you do the calculus, it ends up being equivalent. You get more surface area, but with less direct angle of incidence (assuming the plane is perfectly aligned), so that it exactly balances out. And you have to do less repositioning.

      There's a name for the principle that states it generally, but I forgot it. I just remember having to walk my friend through the math two years ago when it came up in their physics class.

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

      More orders = more profit potential = more venture capital = more money for the CEO to walk away with when it flops. Note that they aren't actually shipping a product yet.

      Color me cynical, I guess.

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

      Ah yes, but this is a series of tubes...

    13. Re:Nanosolar by idontgno · · Score: 2, Interesting

      Which, by some miracle, don't need to be steered. They are magical half-cylinders which always point at any available light source. And, for whatever reason, you seem to be deliberately ignoring the value of reflecting light back from beneath the cylinders. So, effectively, they looks like self-steering half-cylinders plus the other half cylinder gathering "waste" light.

      Don't underestimate the value of "don't need to be steered". Eliminating those moving parts and the associated control automation shaves a huge amount off of installation and maintenance costs. And the lower profile is also pretty useful (wind resistance, aesthetics, clear lines of sight for other things like satellite dishes).

      Remember: the intended application of this technology is rooftop static PV systems, a retrofit application. Steerability is not a factor; the panels are going to just lie on the roofing. The cylindrical design means that a portion of their surface is always almost tangential to the incoming sunlight, maximizing conversion there. A flat panel has less local peak efficiency unless it's steered and sun-tracking, which is not the application in question.

      Really, this sounds like a good compromise for moderately effective PV generation in rooftop retrofit applications.

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    14. Re:Nanosolar by idontgno · · Score: 1

      And, for whatever reason, you seem to be deliberately ignoring the value of reflecting light back from beneath the cylinders.

      And by "you", I mean those in this thread who are ignoring the value of reflected light on the underside of the cylindrical collector. Not "you", Jeanius. I don't think I'm arguing with you, although I responded to your post.

      Damn comment threading system making me hassle my own side.

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      Welcome to the Panopticon. Used to be a prison, now it's your home.
    15. Re:Nanosolar by Jeanius · · Score: 1

      No offense taken. I was referring to the link I posted previously, in that they looked effectively like half-cylinders due to them being mounted almost flush with the roof. They would need to be steered, although their cylindrical shape would reduce the need for highly robust mounts to counteract the wind. And they wouldn't need to be steered as drastically in all directions since they're facing the sun constantly.

    16. Re:Nanosolar by mrcaseyj · · Score: 1

      >I wonder about the cylindrical shape, this would seem to block 50% of the surface area, where the sides and underside would produce less electricity than a flat sheet of the same area.

      >>It seems counterintuitive, but if you do the calculus, it ends up being equivalent.

      Nice try. Are you being paid by Solyndra or something? The stuff about calculus and physics you threw in to make your claims seem more credible is a nice touch.

      I'm pretty sure you can't do any better than flat. And a cylinder or half cylinder solar film is much less efficient than flat. The perimeter of a half circle with a diameter of one, is pi/2, or about 1.57. So that means you'll have to buy 57% more solar panel area than you would if you bought flat ones. It's not clear whether the solar film is applied all the way around the tube or just over 180 degrees, but if it's a full 360 then the analysis is even worse. Of course you may get a little energy from the blue sky, but very little compared to direct sun, certainly no where near enough to make up for the extra 57% you could have had with flat cells.

      You may also get some energy reflected off the roof. But if you think about it, depending on the relative size of the tubes and the space between them, there will be an angle such that if the sun is below that angle (at noon), no direct sunlight will make it past the tubes to the roof. If the roof is thus in shade, the energy reflected off of it will be insignificant. If the sun is above that angle then you will get some energy from roof reflection, but you'd be much better off just using flat panels in direct sunlight rather than wasting collector area trying to capture such a poor energy source as a partially shaded roof reflection.

      There is one aspect of the Solyndra system that I find ingenious. By breaking the panels up into narrow strips with air space between them and mounting them low and horizontal on the roof, the wind loads would probably be dramatically reduced. This may allow a much less expensive installation. But I see no reason to go cylindrical. Square tubes with film on one side or maybe T shaped beams with the film on the top of the T (adjusted to the correct angle to catch the noon sun of course) might work just as well.

    17. Re:Nanosolar by swillden · · Score: 1

      You ignored angle of incidence. I don't know if it's a big enough issue to make up for reduced lit surface, but I can tell you that with traditional PV cells, the angle makes a huge difference. Tilting the 140W panel I have can make it generate up to 6x more power, even though the worst angle still has the full panel surface in the sun.

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    18. Re:Nanosolar by ozphx · · Score: 1

      Yeah and TBH at a buck a watt I don't care how inefficient it is anyway, if thats the output. I've got plenty of roof area to put more of them up.

      --
      3laws: No freebies, no backsies, GTFO.
    19. Re:Nanosolar by mrcaseyj · · Score: 1

      I didn't ignore angle of incidence. I assumed flat panels set at the best angle for the sun at noon. If the cells are left at the same angle all year, then that makes the tubes slightly less bad in comparison, but still much worse than flat cells.

      As far as the change in angle from morning to noon and then evening, the two systems, cylindrical and flat, are equivalent.

    20. Re:Nanosolar by swillden · · Score: 1

      It's a lot more difficult to build an array that can be adjusted for angle throughout the course of the year, and it makes the system much more vulnerable to weather damage. Not to mention the cost of actually adjusting all those panels ever week or two. If you're going to go that far, you might as well install a sun tracking system.

      Even installing a fixed-angle system that faces the average annual noon sun position is more expensive and complex than one which just follows the roof contour. Having installed some flat panels, it occurs to me that the installation process of these tubular PV arrays would be significantly easier as well. The flat panel often blocks access to the mounting brackets, wiring, etc. If the tubes are spaced far enough apart that you can reach through them, it would make installation much easier, which translates to reduced costs.

      Another key characteristic of the cylindrical system is that the cylinders themselves are supposed to be much less expensive to manufacture.

      Add all of that together, and it seems entirely reasonable to me that these might be much more efficient in $/Wh than flat panels.

      As far as the change in angle from morning to noon and then evening, the two systems, cylindrical and flat, are equivalent.

      I'm not so sure about that, myself. Based on a little experimentation with flat panels and incidence angles, it seems possible to me that the cylinders are better, particularly if mounted above a light-colored (or reflective!) roof. I can't say for sure; I'd need to know more about PV cell theory to be able to do the math, but it at least seems possible.

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    21. Re:Nanosolar by Actually,+I+do+RTFA · · Score: 1

      a cylinder or half cylinder solar film is much less efficient than flat. The perimeter of a half circle with a diameter of one, is pi/2, or about 1.57. So that means you'll have to buy 57% more solar panel area than you would if you bought flat ones.

      YOu're not talking about efficenicy, you're talking about cost. What I said is the cylinder is just as efficent, which means it generates as much energy as somthing that takes up an equivalent footprint on your roof (if that flat panel is angled perfectly). Yes, it takes mroe solor cells to produce. However, you don't have to worry about angle of incidence.

      I supposse there are two ways I was considering it to be more efficent: roof space is more limiting than total solar cells, and stationary is much better than moving parts. The 57% more cells probably saves at least that much because they never have to move.

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    22. Re:Nanosolar by mrcaseyj · · Score: 1

      In your original article you quoted a poster saying:

      >I wonder about the cylindrical shape, this would seem to block 50% of the surface area, where the sides and underside would produce less electricity than a flat sheet of the same area.

      This poster is assuming that the solar film is covering the surface of the cylinder all the way around and is comparing these tubes to a flat solar panel with equivalent solar film area facing the sun. That would give a flat panel with approximately pi times or about triple the output, not equivalent as your post claims. If you were talking about output per roof area then you were referring to something different than the poster you quoted without mentioning the change in your post. Thus you claimed the Solyndra tubes collected much more energy per square inch of film than they do, even if that wasn't what you meant to claim.

      Even if you were referring to energy captured per roof area, you were wrong. A flat panel laid horizontally on the roof would capture more than the Solyndra tubes and their gaps. Although for the flat horizontal panel to capture more than the Solyndra tubes there would have to be no gaps or very little gaps between the flat panels, thus possibly increasing vertical wind loads on the mountings to more expensive levels. I expect it would be rare for the slight(if any) advantage in roof area of the Solyndra tubes to make them more desirable than narrow flat panels set at a reasonable incidence.

      If it turns out that manufacturing film is much cheaper in tubes then that may make them a good idea. But I'd guess it's actually a lot cheaper to make the film flat.

      Also, if flat panels were made in narrow strips and mounted like the Solyndra tubes, then I think it would be trivial and cheap to make them adjustable for incidence. Whether it would be worth the labor to change the angle a couple times a year is another question. They might also be supplied by the manufacturer in a selection of say five or ten different preset incidence angles at little extra cost to the manufacturer.

    23. Re:Nanosolar by Actually,+I+do+RTFA · · Score: 1

      The sides would produce less electricity per square inch. But as you pointed out, there are more square inches.

      Yes, I refer to energy per surface area of the roof. Space seems to be the limiting factor.

      The reason for the gaps is so that at extreme angles of incidence, the cells seem dense. For an optimal flat array at the extreme angle, the same gaps are required.

      Whether it would be worth the labor to change the angle a couple times a year is another question

      For those of us not lucky enough to live close to a pole, the Sun takes less than a year to move significantly accross the sky. Angle of incidence changing over time of day is far more important than angle changing over seasons, and far hard.

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    24. Re:Nanosolar by mrcaseyj · · Score: 1

      >The sides would produce less electricity per square inch. But as you pointed out, there are more square inches.

      No there wouldn't be more square inches. The comment you originally quoted was referring to the fact that if you have one square meter of solar film and you wrap it around a bunch of cylinders then you will collect less energy than if you spread that square meter out flat and mount it at the best angle to catch the noon sun. You said they turned out to be equivalent(even if that's not what you meant to say), but they're not. Spreading the film out flat gets you much more energy from a given area of film.

      >Yes, I refer to energy per surface area of the roof. Space seems to be the limiting factor.

      The advantage of tubes over flat panels in capturing energy per area of roof is at best very small and probably non-existent. I'd guess you'd be better off looking for more area to mount flat panels than using tubes, or just use grid power for that tiny bit extra. If grid power isn't readily available then you probably don't have space problems.

      >Angle of incidence changing over time of day is far more important than angle changing over seasons

      Tubes and flat panels are equivalent as far as changes in efficiency with changes in sun direction over the day are concerned. If flat panels are 57% better at noon then they'll be about 57% better at any other time of day as well.

      Much of this analysis would change if for some reason it was cheaper to manufacture a given are of film on the surface of a cylinder than flat, but since the opposite is probably true, it makes the picture even worse for tubes.

    25. Re:Nanosolar by Actually,+I+do+RTFA · · Score: 1

      he comment you originally quoted was referring to the fact that if you have one square meter of solar film and you wrap it around a bunch of cylinders then you will collect less energy than if you spread that square meter out flat

      That's not what I'm saying. I'm talking about roof area. It will take more meters of film, I concede that, but it will be cheaper than making the films move. And it will fit more film per square meter on the roof.

      The advantage of tubes over flat panels in capturing energy per area of roof is at best very small and probably non-existent.

      No, it's drastically more efficent, see below.

      If flat panels are 57% better at noon then they'll be about 57% better at any other time of day as well.

      For the love of all get out, the sun is traverses 180 degrees, with 170 or so not blocked by the earth. The angle of the sun to the flat panel determines efficency. A plane has one optimal normal. If a flat panel is arranged optimally, the normal and vector to the sun will coincide at high noon. A tube has infinite optimal normals, with more area exposed so that the math equates it to a grid with the same cross-section optimally positioned at any given point of time. Which makes the same area on the roof more efficent with the exception of like 5 minutes. Maybe 15.

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    26. Re:Nanosolar by mrcaseyj · · Score: 1

      You're still way off. This could go back and forth for a long time and I don't have that much time to spend on this, so I'm going to leave it here.

  10. I don't get it by wonkavader · · Score: 2, Interesting

    They're letting valuable light past. They're getting a little of it back on the rebound. The round design means some of the cell is always straight on to the sun, but it's a VERY small part.

    Wouldn't a flat roof of the same material be much more efficient?

    1. Re:I don't get it by Anonymous Coward · · Score: 4, Funny

      I don't know the answer. But I am certain that such questions never occurred to the two Stanford engineering PhDs who founded the company, or the tens more they have subsequently hired to do R&D.

    2. Re:I don't get it by andy19 · · Score: 1

      I'm sure putting some sort of highly reflective material directly under the tubes will help increase the efficiency of the tubes.

    3. Re:I don't get it by Anonymous Coward · · Score: 0

      I think the idea is that it would be more efficient some of the time, and some of the time it would be less efficient. I didn't see any numbers comparing actual efficiency to similar products, but I'd be surprised if something that's both harder to manufacture (and thus more expensive) and less efficient would be marketable.

    4. Re:I don't get it by bigmo · · Score: 3, Insightful

      It may be that the tubes are used with concentrating reflectors, so that the back side is in fact the highest output and the front side is just a little extra from the direct illumination. The tube design would also allow a fluid to be circulated to pick up any heat gain that would go along with the concentrating reflectors.

    5. Re:I don't get it by ruin20 · · Score: 1

      Solyndra's cylindrical solar modules collect sunlight more efficiently across a broader range of angles and catch light reflected off the roof itself

      Plus it seems like these are MUCH cheaper to produce per unit than standard wafer based PV. Essentially there's a coating system applied to the tube and then just a pressing of an adapter on either end. However I will state, according to the article, they may become more cost efficient than other conventional power options, they are not there yet as they aren't getting optimal yield out of the PV technology.

      The advantage they have is this is very producible, and scalable. It's much easier to tap into a tube than a flat sheet and if you place a reflective coating on the roof, you should mitigate any losses due to form factor quite nicely.

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  11. So what do they cost? by AnotherBlackHat · · Score: 1

    Nice to know that these "may be competitive with other forms of power even after solar subsidies are phased out."

    Any idea what the unsubsidized cost per watt is today?

    -- Should you believe authority without question?

    1. Re:So what do they cost? by ozphx · · Score: 1

      Australia is around 18c/kWh peak. The grid will buy back power at that rate.

      The government provides a subsidy of $8/Watt up to 1kW for solar installations. If you net negative useage for a billing period, the total buyback is doubled.

      These new tech CGID panels (and theres a few manufacturers) cost around $1/watt. I think around $3-4 a watt is break-even, but a realistic economic analysis (I could invest in an oil company and get say 9% return), was suggesting around $2 a watt. (Theres fudge factoring for weather/night included here).

      So yes, these are in fact a better buy than paying your power company, in Australia. Don't think you can call up the Solar Shop though - those bastards are still pimping the shitty ones.

      --
      3laws: No freebies, no backsies, GTFO.
    2. Re:So what do they cost? by jbeaupre · · Score: 3, Informative

      In essence, solar costs about $.30/kwh. http://www.solarbuzz.com/SolarPrices.htm Location is important. Costs more in Germany, less in California. http://www.solarbuzz.com/statsCosts.htm. This competes against under $.10/kwh in the US for other sources. But there are variations around the world and even within the US http://www.eia.doe.gov/cneaf/electricity/epm/table5_6_a.html

      --
      The world is made by those who show up for the job.
  12. Is this for real? by Animats · · Score: 3, Interesting

    The Solyndra tubes have me puzzled.

    First, they're round, with the active surface uniform around the tube. So only a fraction of the active surface is doing much. Unless they can make active surface far cheaper than anybody else, this is a lose.

    The claimed advantage of this approach is supposed to be that the units can be mounted flat to the roof. But you can do that with flat solar panels; it just costs you about 30% of the output because you're not getting max sun input per unit area. Solyndra is paying a bigger oblique penalty than that; they're probably losing 60% over a flat panel pointed roughly at the sun.

    Their web site has no numbers on prices, costs, efficiency, output per unit area, or third party test results. That's a bad sign.

    1. Re:Is this for real? by Mr._Galt · · Score: 2, Interesting

      The claim on the site is that the cylinders can harvest indirect and reflected light as well. Conventional panels only use direct light. Therefore a horizontal mount is optimum for these cylinders since they will receive some direct light any time of day while still receiving reflected and indirect light. They also show how you can cover vastly larger areas with their cells because of the way they are mounted and designed to handle wind loads. The increase in coverage should more than make up for any loss of direct light. Of course, all this assumes that they are not big fat liars.

    2. Re:Is this for real? by smellsofbikes · · Score: 3, Interesting

      Since mirrors are cheap compared to solar cells, wouldn't it make more sense to mount these tubes at the focal point of a linear/parabolic mirror? That really seems exactly what these were designed for, not just harvesting off-axis light.
      What am I missing here? Doesn't it seem like this is the perfect answer to a question they don't seem to have asked?

      --
      Nostalgia's not what it used to be.
    3. Re:Is this for real? by mysticgoat · · Score: 1

      So long as the Sun is up, a properly oriented tube will always have a thin line with perfect angle of incidence to the Sun, and a region somewhat less than half the tube's diameter that has a pretty good angle of incidence. Over the course of the day, the amount of surface area that is in excellent to good relationship to the Sun's rays is nearly constant, and if the tubes are spaced optimally, this area is nearly as large as that which a flat panel array of the same size would provide. Plus, the tube is self-supporting, so there are minimal shading losses from structural support, and it can capture reflected light from its backside. Any comparison of flat panels with tubes needs to take these factors into account.

      Over the course of a day, I can see where the light gathering ability of a static array of tubes would be comparable to the light gathering ability of a static array of flat panels. The output curves would be very different: the flat array would have a much higher midday peak, but the tube array would begin producing output earlier in the morning and continue for longer into the evening.

    4. Re:Is this for real? by pz · · Score: 1

      But -- they gain hugely compared to standard flat panels in structural rigidity for the same amount of material.

      As mentioned on their web site, the tubes are far more wind tolerant than large panels. Also remember that just because a solar cell isn't pointing directly at the sun doesn't mean it completely loses efficiency -- it primarily loses efficiency because it's not getting as many photons striking the surface as if it were oriented correctly.

      A good comparison on how much insolation they'll catch is to imagine a single long sheet of flat solar collector the length of one of their tubes, and the same width as the diameter of the tube. Then, you'll need a mechanism for maintaining ideal positioning by rotating about the long axis. And, you'll need to make it two-sided to catch the reflected energy.

      And now, make the comparison: the two systems will obtain approximately the same insolation (the rear flat panel in this thought experiment will be somewhat less efficient than the Solyndra equivalent, but let's assume it will be as efficient -- doing it correctly will only help the Solyndra argument). The Solyndra tubes will be far more rigid for the same thickness of base material. They won't need a steering mechanism. They might or might not be easier to manufacture.

      And the penalty for these advantages (dredging out the old highschool geometry) is ... pi x D / 2D = about 1.6 more active material for the same insolation.

      So, it's an engineering tradeoff, given the constraint of making a more wind-tolerant solar panel that is more-or-less long and thin, you have 60% higher coating and base material costs because you're making tubes rather than (long) flat panels, plus whatever additional manufacturing costs that might or might not be different for making tubes vs sheets, and you gain in not having to provide a steering mechanism. Of course, as stated above, this is assuming you want to capture a given insolation.

      I can easily see it being a design worth investigating. I can also see, as other posters have pointed out, that it would make emminent sense if you were to combine these tubes with long parabolic reflectors. And, come to think of it, these will still have decent residual power generation even when it has snowed, due to the reflected capture -- a flat panel will lose far more collection efficiency when covered in snow.

      Moreover, since the idea is non-obvious, they'll have good patent protection and therefore an ideal marketing position. Exclusive, strong, cheap, wind tolerant, still works when covered in snow -- no wonder they're booming.

      --

      Put my fist through my alarm clock with its ding-dong death inside my ear. - The Blackjacks.
    5. Re:Is this for real? by idontgno · · Score: 1

      Focusing mirrors have to be actively steered (Sun-tracking). Steering is expensive and more maintenance-intensive than a bunch of tubes just lying there. Ultimately, that's overkill for a "slap it up on the roof" retrofit application.

      OTOH, an underlayment of flat mirrors would serve as a nice "second chance" enhancement, getting photons that lucked out and missed the surface of the cylindrical collector the first time past.

      If we're not talking about a static installation, I don't think the "cylindrical collector, steering mirror" system has much advantage over "flat steerable collector" system.

      --
      Welcome to the Panopticon. Used to be a prison, now it's your home.
    6. Re:Is this for real? by Urkki · · Score: 1

      Mirrors with focal points need to follow the sun. That's moving parts. Moving parts are not good, they cost money and they break down and they are more complex to install. Even if installation cost of no-moving-parts solution is a bit more, you'd still want to take it over a moving-parts solution.

    7. Re:Is this for real? by Anonymous Coward · · Score: 0

      The sun isn't always overhead, so as the sun moves from one horizon to the other, the tubes will always have a face perpendicular to the sun, assuming they are installed in a North-South manner.

      I would assume that this will allow them to generate more during the morning and evening hours, when your typical flat panels are no longer pointed at the sun.

    8. Re:Is this for real? by EEthan · · Score: 1

      If you read the article, it mentions that the system is designed to harvest light that is reflected off the roof of the building, which is probably being lit by the spaces between the tubes.

      On that note, however, concentrating solar power systems do exist (http://en.wikipedia.org/wiki/Concentrating_solar_power#Concentrator_photovoltaics) Note that many concentrated solar power plants don't use photovoltaic cells at all. Many just focus sunlight to boil water for a steam turbine or to run a stirling engine directly.

      If this were a perfect solution, it would probably be implemented more often. My guess is that the cost and complexity of making a giant parabolic mirror, or a lot of flat tracking mirrors, outweighs the increases in efficiency. Also, imagine the maintenance costs on a field of electromechanical solar tracking mirrors or on a parabolic mirror that needs to be wiped down every so often.

      Also, the chances of blinding/cooking alive passers-by with your giant parabolic mirror if your tracking system dies are probably too great for comfort.

      damnit, now i want a giant parabolic mirror.
      come on, how cool would that be?

    9. Re:Is this for real? by Anonymous Coward · · Score: 0

      My guess is that the circular shape is some how invovled in the manufacturing process.

    10. Re:Is this for real? by Anonymous Coward · · Score: 0

      Solar cells are less efficient when they're hot

    11. Re:Is this for real? by smellsofbikes · · Score: 1

      Thing is: solar cells are nonlinear. If you give them twice as many photons, they return *more* than twice as much power. So you get a leveraged advantage by doing this. That's why NREL and others have been doing so much research into solar concentrators -- most of the recent ultra-high-efficiency announcements have been from solar concentrators.
      The advantage is, as I said, that you have a small amount of high-expense material and a lot of cheap mirror. The disadvantage is that hot solar cells do poorly, so oftentimes you have to cool them. (hence cogeneration systems, that cool the back of the cell with some fluid and then use the heat for something useful.)

      If you use horizontal collectors, they won't have to move very much. They'd track the sun as it moves across the sky, naturally: they'd only have to adjust for its altitude. That means the highest they'd have to aim is just the latitude you're at, and for all but one day of the year, they'd be even lower than that. (And as for reflection, the focus of a parabolic mirror is always going to be within the mirror, even when it's off-axis, so at most you'll get a single line of reflection if the thing's stuck at the wrong angle.)

      How big a parabolic mirror do you want? Have a big printer? It's easy to make an x=y^2 graph in Excel and print it out. Take a bunch of sheets of plywood, bolt them all together, glue the excel printout on the top, cut with a saber saw. You now have a clamp system. Put a reasonably shiny sheet of thin aluminum -- the 0.006" stuff they use for gutter sheathing is very easy to work with and fairly shiny -- clamped between all those and you have a great linear parabolic that's perfect for eg this solar cell or heating water in a black-painted copper tube running down the focal point.
      If you want a spherical parabolic, that's harder. For that you need a lathe and you have to learn metalspinning. That's still not *too* hard, though: I spun up some toroid shapes for a tesla coil the other night, out of thin aluminum. It's quick and easy once you get the hang of it. Hopefully I'll be doing a 40 cm parabolic for the hot side of a Stirling some time soon.

      --
      Nostalgia's not what it used to be.
    12. Re:Is this for real? by Anonymous Coward · · Score: 0

      Yes, the bulk of the current is produced by a small portion of the surface; but that region of high productivity is constantly changing, with the angle of the sun. Moreover, unlike a flat surface, there is a portion of the surface, constantly changing, which is at near-optimal relation to the incident sunlight. Because this region, at any given time, is producing much more energy than would a corresponding region of a flat panel during pessimal lighting periods, power is produced more uniformly during the day and year. Overhead costs associated with voltage spikes necessitating design for extreme operating conditions are reduced, and airflow around the panel reduces installation infrastructure costs. The data simply are not being made readily available to accurately assess the relative merits/demerits of various designs, but producing such a report for public conspumption would seem to be a high priority task, very much in the public interest.

  13. Hail by Anonymous Coward · · Score: 0

    one word: hail

    1. Re:Hail by jameskojiro · · Score: 1

      Another word, Plastic acrylic tube covering these solar tubes, or wire mesh installed above them....

      --
      Tsukasa: All I really want, is to be left alone...
  14. Tube Independance by Anonymous Coward · · Score: 0

    We already get our internet through a series of tubes. Do we want our electricity the same way?

  15. Ted Stevens Comments on Solar Cells by Spatial · · Score: 1

    I just the other day got, a solar cell was sent by my staff at 10 o'clock in the morning on Friday and I just got it yesterday. Why?

    Because it got tangled up with all these things going on the roof commercially.

    So you want to talk about the consumer? Let's talk about you and me. We use this solar cell for power and we aren't using it for commercial purposes.

    We aren't earning anything by going on that solar cell. Now I'm not saying you have to or you want to discriminate against those people. The regulatory approach is wrong. Your approach is regulatory in the sense that it says "No one can charge anyone for massively invading this world of the solar cell". No, I'm not finished. I want people to understand my position, I'm not going to take a lot of time.

    They want to deliver vast amounts of power over the solar cell. And again, the solar cell is not something you just dump something on. It's not a truck.

    It's a series of tubes.

    And if you don't understand those tubes can be filled and if they are filled, when you put your power in, it gets in line and its going to be delayed by anyone that puts into that tube enormous amounts of energy, enormous amounts of energy.

  16. is people?! by DirkGently · · Score: 3, Funny

    There has to be some way to tie together "Solyndra" and "green" and "is people". Step up the puns here, people.

    --

    I keep trying to pick fights, but I can't shake this Excellent karma.

    1. Re:is people?! by Quiet_Desperation · · Score: 2, Funny

      There has to be some way to tie together "Solyndra" and "green" and "is people".

      Solyndra green is people.

      There ya go. Not sure what your difficulty was, actually.

    2. Re:is people?! by Anonymous Coward · · Score: 0

      Soylent Green?

    3. Re:is people?! by Anonymous Coward · · Score: 0

      Solyndra Green Power (is)/(to the) People!

  17. Put windows in the roof. Get the sunlight direct! by Anonymous Coward · · Score: 0

    Right, so instead of designing warehouse shops with skylights to let light in, they make sure they have opaque roofs and build them extra strong to carry the extra load of all those solar panels... to power the lighting units inside the warehouse shop.

    Great! What will they think of next.

  18. Some companies do this already by Anonymous Coward · · Score: 1, Interesting

    I don't know if it supplies all the power needed, but some big-box type places do have solar setups - like Kohl's:

    http://www.ecogeek.org/content/view/621/
    http://findarticles.com/p/articles/mi_m0EIN/is_/ai_n27971502

    disclaimer: I work in Kohl's IS dept.

  19. Ted Stevens would be proud by Anonymous Coward · · Score: 0

    So, basically, this power source is a series of tubes?

  20. waaaaay too much funding by nietsch · · Score: 1

    If you read the article you might get a positive impression about these guys, but when you look at their picture gallery, it is clear these guys have had waaaay too much money to play with. Robots everywhere, it looks like a car manufacturing plant. Autonomous vehicles that transport the goods around? What is wrong with their hands, are they all engineers afraid to get their hands dirty? Robots may look very cool, and may be cheaper than humans in the long run. But if you are just starting up, won't real humans be much more flexible?

    --
    This space is intentionally staring blankly at you
    1. Re:waaaaay too much funding by cowscows · · Score: 2, Insightful

      If you've already got 1.2 billion dollars in orders, you can probably throw a little bit of money towards automating your production line. And while I don't know much about the specifics of this particular product, solar panel manufacturing is generally a fairly high precision activity, and often involves raw materials that aren't the most healthy substances for humans to be around. A nice, clean, automated production facility is ideal for solar panels.

      This isn't a couple of guys who started a business out of their garage last week. They've already done the bulk of the messy design work, and they're moving on to mass production. They're probably still doing more of the hands-on design work as well, but it likely happens in a whole separate building from their factory.

      --

      One time I threw a brick at a duck.

    2. Re:waaaaay too much funding by LeadSongDog · · Score: 1

      To get local government subsidies most places, you need to promise to spend them locally. Otherwise those pesky shareholders will want you to spend them where they get the most ROI (even if it's taxpayer's "I". No politician wants to go up for re-election explaining why a shuttered factory was built with taxpayer dollars. So the companies build a cheap building full of expensive movable equipment and call it an expensive facility. Then when it suits their purpose, they relocate the equipment to another tax administration. It's an old story.

      --
      Oh, I'm sorry sir, I thought you were referring to me, Mr. Wensleydale.
    3. Re:waaaaay too much funding by infolib · · Score: 1

      are they all engineers afraid to get their hands dirty?

      They might be engineers afraid to get their product dirty. Semiconductor nanofilms seem like the kind of product that might be sensible to contamination. Besides, they have to aim for economies of scale. The testing cells they can make in little labs, one square mm at a time.

      --
      Any sufficiently advanced libertarian utopia is indistinguishable from government.
  21. ...that resemble compact fluorescent lightbulbs. by Anonymous Coward · · Score: 0

    I hate to nit-pick, but here it goes:

    When I hear "compact fluorescent lightbulb" I think of a small spiral shaped tube.

    When I see these solar cells, I think of a long T12 fluorescent lamp.

  22. too be fair by Technopaladin · · Score: 1

    NASA has hundreds of PhDs and they did a bang up job on Skylab and Mars probe.
    But I agree with you for the most part.

  23. Not likely by mbessey · · Score: 1

    I'd think that metal tubes would make it hard for the light to reach the active coating on the inside. Their tubes doi have metal end caps, though...

  24. On the off-chance that you're not kidding... by mbessey · · Score: 1

    Their manufacturing plant is a former hard-disk factory. Which makes sense, since much of the coating equipment and the material-handling equipment would be similar. I wouldn't be surprised to learn that some of their equipment was pulled out of storage from the former factory owners for pennies on the dollar.

    Some of the robots might be strictly for the gee-whiz factor, but given that they're trying to make a new technology economical, automating production as much as possible is just good sense.

  25. Re: Not if it's made using ALON by Moodie-1 · · Score: 2, Interesting

    ALON (otherwise known as aluminum oxynitride) is an aluminum ceramic that has the curious property of being transparent while also being almost as strong as steel. It's being tested by the military for use as transparent armor. Check out http://www.technovelgy.com/ct/Science-Fiction-News.asp?NewsNum=481 for more info.

    Seems Scotty knew what he was talking about after all!