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Solar happenings

Discussion in 'Energy, Environment, and Policy' started by vfx, Aug 22, 2008.

  1. dpeilow

    dpeilow Moderator

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    Indeed I did, although bizzarely that was the URL I had that worked for me.

    I've edited the original post now.
     
  2. graham

    graham Active Member

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    The Anti-reflective coating is interesting to me, as it sounds like it could be used also for existing solar panels to boost their efficiency. That would be very cool!

    I wonder how far they are away from making it a product?
     
  3. dpeilow

    dpeilow Moderator

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    Am I being dumb here? Surely, regardless of the new coating, if the panel is not normal to the direction of the light source then it will see a lower power flux across the panel and the cosine rule still applies?
     
  4. vfx

    vfx Well-Known Member

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  5. dpeilow

    dpeilow Moderator

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    Well, I'm not so sure.

    Firstly, while they may be able to absorb every photon landing on the array, if the array is not normal (90 degrees) to the direction of the light, then they will get a proportional amount of photons to the angle that is presented.

    Secondly, if the photons absorbed are not of the frequency/wavelength/colour that the semiconductor junctions are able to convert then it doesn't matter. They will never get above the theoretical maximum that a state-of-the-art (e.g. triple junction) solar array can produce.

    There may be some benefits from the refraction from the seven layers, but this is not a panacea.
     
  6. vfx

    vfx Well-Known Member

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  7. vfx

    vfx Well-Known Member

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  8. TEG

    TEG TMC Moderator

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    #29 TEG, Mar 6, 2009
    Last edited by a moderator: Mar 13, 2016
    Veranda personal solar, and and idea.

    So I saw this: Solar Power For $2 A Day



    It got me thinking, I have two types of things mounted on my roof pointed at the southern sky - solar panels & satellite dishes.
    Why not combine them. How about the "green dish" option from DirecTV and DishNetwork? When your dish gets mounted you ask for the green option and they give you a dish with a small solar panel integrated in. They are already mounting it and pointing it towards the southern sky, and running cables back into your house. The satellite box inside could have a small inverter built in and just send a bit of power back down the line during the day.
     
  9. doug

    doug Administrator / Head Moderator

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    Integrated in?? You mean on the parabolic reflector?
     
  10. TEG

    TEG TMC Moderator

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    Well, maybe... Or if the solar material interferes with the bouncing RF transmission it could just be "winglets" of solar panels flared off to the sides of the dish.
     
  11. doug

    doug Administrator / Head Moderator

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    Well looks like these guys got some DOE money:
    [​IMG]
    Solyndra gets its long-awaited loan from DOE - San Francisco Business Times:

     
  12. TEG

    TEG TMC Moderator

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    That is good news. It seems like the VCs were not ready to do more rounds without some government help. We certainly need the jobs, and the world could probably make good use of this technology.
     
  13. SteveF

    SteveF Member

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    Now how about some additional tax breaks so more consumers can afford to install them on their homes. The time to payback is a bit long right now for most folks, I think.
     
  14. vfx

    vfx Well-Known Member

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    #35 vfx, Mar 20, 2009
    Last edited: Mar 20, 2009
    Still looking for data on these things! What is the efficiency/cost ratio? A white paper is needed.

    And what about cleaning?
     
  15. SByer

    SByer '08 #383

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    How about stopping the extreme subsidies for coal power (pricing in the environmental damage, especially of mining)? Solar would look positively cheap.

    Seriously, the payback time never includes any increase in home equity - because, well, there's not much data on it. The data is starting to come in, and even if you halve it, in some parts of the country, like here in CA...

    I think people are nuts for not installing solar PV systems.
     
  16. vfx

    vfx Well-Known Member

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    And taking that money and putting it directly into Solar, etc.
     
  17. vfx

    vfx Well-Known Member

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    #38 vfx, Mar 22, 2009
    Last edited: Mar 22, 2009
    The Solyndra loan is the first from the DOE. It's also worth mentioning how fast this went through since the previous administration had been stonewalling any funding decisions for 2 years.

    More details:
     
  18. TEG

    TEG TMC Moderator

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    Solyndra reveals thin-film solar tubes | Cleantech Group

    Comparable to traditional flat silicon based solar panels as long as you make the roof below reflective.
     
  19. Chris H.

    Chris H. Member

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    At 2m^2, they take up more area than a "traditional" PV module, which is usually approx. 0.8m x 1.5m for a 175 watt panel. That makes them less power dense than a traditional panel.

    I wonder how they compare in $/W?
     

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