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User: mdsolar

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  1. Re:Hiatus? on Cause of Global Warming 'Hiatus' Found Deep In the Atlantic · · Score: 1

    Does not you complaint presume non-reoccurrence? Owing to physics, it is expected warming will continue. So, this may be considered a pause from the expected behavior. This is not merely an extrapolation of past behavior, so your thinking is baseless.

  2. They melt on Cause of Global Warming 'Hiatus' Found Deep In the Atlantic · · Score: 1

    in order?

  3. Re:NIMBYs? Crackpots? on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    The new ones tend to be combined cycle. The old ones are plain turbines which helps them to follow load.

  4. Re:NIMBYs? Crackpots? on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Do you know of any purely gas boilers?

  5. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    To replace coal, uranium use would have to increase by a factor of more than seven around the world. The reactors built to do that would run out of fuel before they all got commissioned.

  6. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    You forget that all Gen III is behind schedule and has huge cost overruns. And there is not enough uranium to replace coal. No hope there. http://www.rmi.org/Knowledge-C...

  7. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    The US does not allow reprocessing. It is a huge proliferation risk.

  8. Re:Mixed feelings on The First Particle Physics Evidence of Physics Beyond the Standard Model? · · Score: 1

    The story was submitted by a user called StartWithABand.

  9. Re:NIMBYs? Crackpots? on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Natural gas gets to 60% efficiency with combined cycle generation. First the gas is burned in a turbine like a get engine and then the exhaust turns water to steam to run a second turbine. Peakers, which don't have the second cycle are much less efficient and are thus more expensive. Solar competes nicely with those. You can do combined cycle with coal as well if you gasify the coal first. It is unlikely that many of these will be built in the US but there is one under construction in Mississippi http://en.wikipedia.org/wiki/K...

  10. Re:LOL on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    I blow my nose in your general direction....

  11. human canine transmission on Study: Seals Infected Early Americans With Tuberculosis · · Score: 1

    There is evidence for human canine transmission of TB http://wwwnc.cdc.gov/eid/artic... and dogs were kept in the Americas so the transmission path could have involved another animal in addition to seals.

  12. Re:Don't worry on Study: Seals Infected Early Americans With Tuberculosis · · Score: 1
  13. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Gen IV is illegal in the US and Gen III behind scheduled and over budget. Perhaps you are having difficulty with reality.

  14. Re:Drop solar heat for direct conversion on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Old guys don't keep up I guess. http://www.rmi.org/Knowledge-C...

  15. Re:Storage not needed on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    He's got a lot of publications and is often invited to speak as an expert to organizations such as the American Physical Society. Perhaps you are thinking of a different person?

  16. Re:god dammit. on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Fawkes is a phoenix, Harry. Phoenixes burst into flame when it is time for them to die and are reborn from the ashes.

  17. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Sorry, two topics at once. Radiation is killing birds at Fukushima and Chernobyl. Switching to cooling ponds for Indian Point and other river or tidewater nuclear plants may be impractical.

  18. Re:How Many Birds on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    A lot if it melts down before it is decommissioned.

  19. Re:Operating nuclear plants cause radiation accide on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    Hey, lay off.

  20. Re:Operating nuclear plants cause radiation accide on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    They were operating when the caused radiation accidents.

  21. Efficiency on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    An efficiency argument is a little complicated to make here. "Single p–n junction crystalline silicon devices are now approaching the theoretical limiting power efficiency of 33.7%, noted as the Shockley–Queisser limit in 1961. In the extreme, with an infinite number of layers, the corresponding limit is 86% using concentrated sunlight." http://en.wikipedia.org/wiki/S... This is because the 86% number is the Carnot limit and solar thermal has the same limit. We don't see very high Carnot efficiency like that in practice at thermal plants because of material constraints. Gas turbines are made of material that will melt at too high a temperature, for example. Potentially, multi-junction solar PV with concentration will break 70% efficiency and beat gas turbines or their (eventual) solar thermal equivalents at 60% because the materials are being used differently. Efforts are presently aimed at 50% efficiency. But, you are back to concentrating sunlight which was the issue with the birds in the first place. A smaller reflector geometry would fix the bird problem, but that is true with solar thermal as well.

  22. Re:god dammit. on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 0

    Nuclear power requires uninterrupted police powers for tens of thousands of years to control nuclear waste. It is a poor fit for Jeffersonian democracy.

  23. Re:Huge bird and fish kills on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 1

    No, this is owing to radiation. Not too sure where the land would be found for closed loop for Indian Point, for example.

  24. Operating nuclear plants cause radiation accidents on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 0

    Bird life has been severely impacted at Chernobyl and Fukushima. You are being deceptive here.

  25. Re:god dammit. on Solar Plant Sets Birds On Fire As They Fly Overhead · · Score: 3, Informative

    It is horse tail hair for bows, cat gut for strings.