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Science Forum

  1. Standard member sonhouse
    Fast and Curious
    08 Mar '10 16:20
    http://www.physorg.com/news187186888.html

    Fire in the hole gets a whole new meaning now!
  2. 08 Mar '10 19:56
    whatever happened to MHD?
  3. Standard member sonhouse
    Fast and Curious
    08 Mar '10 22:49
    Did you read the article?
    This is one version of solar MDH, magnetohydrodynamic power generation. Liquid metal flowing through a magnetic field generates power. This site I am linking to must be pretty old, it is all HTML, no CSS or anything.
    http://www.linux-host.org/energie/smhd.htm
  4. 09 Mar '10 00:25
    yeah, but i wonder how they will scale it up. 3000 deg K inside a nanotube doesn't translate to much outside the nanotube, i would guess.
  5. 09 Mar '10 00:40
    Originally posted by sonhouse
    Did you read the article?
    This is one version of solar MDH, magnetohydrodynamic power generation. Liquid metal flowing through a magnetic field generates power. This site I am linking to must be pretty old, it is all HTML, no CSS or anything.
    http://www.linux-host.org/energie/smhd.htm
    i think it was probably written by a physicist.

    i was thinking of coal-fired MHD. wiki says it's ok for retrofitting old single-cycle plants but not economical for new multi-cycle plants.

    http://en.wikipedia.org/wiki/MHD_generator#Economics
  6. 09 Mar '10 00:55
    my own web page uses HTML, CSS, a banner graphic and maybe a few widgets. your MHD link does have java, probably cut-and-pasted blocks to support Google ads.
  7. Standard member sonhouse
    Fast and Curious
    09 Mar '10 02:54
    Originally posted by zeeblebot
    i think it was probably written by a physicist.

    i was thinking of coal-fired MHD. wiki says it's ok for retrofitting old single-cycle plants but not economical for new multi-cycle plants.

    http://en.wikipedia.org/wiki/MHD_generator#Economics
    Coal fired MDH. Heating a liquid metal like mercury and flowing through magnets? I guess that is supposed to be more efficient than running a steam boiler/turbine but show me the money I don't see any MDH online, do you? There must be some fundamental reason why they never caught on. Some of the original work was done almost 50 years ago.
  8. 11 Mar '10 02:57
    the wikipedia link says it's not economical as new equipment in modern multi-cycle plants. it's only economical as add-ons to existing, older single-cycle plants.
  9. 11 Mar '10 02:58
    maybe there is not enough residual energy for MHD left over after the multi-cycle plants are done.
  10. Standard member sonhouse
    Fast and Curious
    16 Mar '10 22:50
    Originally posted by zeeblebot
    yeah, but i wonder how they will scale it up. 3000 deg K inside a nanotube doesn't translate to much outside the nanotube, i would guess.
    Scaling up would be just a bunch of nano's in parallel, trillions of them. It would be interesting to see how much energy one nano produced, then we could pretty much calculate what scaling up would mean, how many nano's would be required for a megawatt for instance.
  11. 17 Mar '10 18:15
    reminds me of a power source i read about recently in a scifi novel. small (like a Pringle's can?), cool on the outside, jillions of degrees on the inside. think it was in Frederick Pohl's Starburst, 1982.