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Thread: Underground Windmill

  1. #1

    Default Underground Windmill

    Just when I thought we had heard it all. This underground windmill is 280% more efficient than current models. They state that birds and bats have nothing to fear from this new technology.

    www.sheerwinds.com

  2. #2
    Join Date
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    Default Re: Underground Windmill

    But what about the poor earth worms? What about ground living creatures like moles and such? What are these people thinking?
    Not Under My Back Yard!
    Pour on the coal and oil, I want electricity and I want it now!
    1900 watts PV, (1000 watts PV feeding MidNite Classic 150; 900 watts PV + 160 watts micro hydro both feeding into a single shared Morningstar TS-MPPT-60) ; Xantrex Pure Sine 1800/12 for heavy loads; Xantrex Pure Sine 1000/12 on 24/7 for everything else; six Rolls Surrette 2 volt L16 @ 12 volts.
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  3. #3
    Join Date
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    Williams Lake, BC
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    3,137

    Default Re: Underground Windmill

    took a bit of 'follow the links ' (not much on their website) but got a good description out of these 2 articles

    http://www.mn2020hindsight.org/view/...nes-you-betcha
    http://www.earthtechling.com/2011/12...er-on-horizon/

    very interesting but to me it appears to be large scale for a long time...
    100% Off Grid @ 51* 46' N lat 124* 44' W long

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  4. #4

    Default Re: Underground Windmill

    I would worry the intake horn could create a low frequency oscillation resulting in a very powerful "brown note".
    http://www.audiocheck.net/testtones_brownnote.php
    Last edited by nsaspook; March 22nd, 2012 at 11:30 PDT.

  5. #5
    Join Date
    Jun 2003
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    pittsburgh, pa
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    10,282

    Default Re: Underground Windmill

    i'll bet it scares away ground hogs too.

    if the first description i saw they used a cone faced into the wind it would force the wind to that point below and would exit on the ground. this one would need something to keep it facing the wind like a tail, but would work imo. to me the 2nd link as shown can't do any thing as there's nothing forcing the wind down into it as it would just bypass it and i see no exit that isn't being acted upon with the same equal force so the 2nd one is just an oversized inground ground hog chaser.
    NIEL

  6. #6

    Default Re: Underground Windmill

    This is a "WAG" but it looks like a horn tapered to the generator , on top of the main horn is another horn (open at the bottom) with a gap feeding into the first horn. In the gap between the two horns the wind would create a vortex that would create a pressure gradient from the top of the second horn and the feed throat of the main horn. This pressure gradient would start the movement of air into the feed tube to the generator.

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    Last edited by nsaspook; March 22nd, 2012 at 13:56 PDT.

  7. #7
    Join Date
    Jan 2011
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    Baltimore, MD
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    Default Re: Underground Windmill

    Quote Originally Posted by sawmill View Post
    Just when I thought we had heard it all. This underground windmill is 280% more efficient than current models. They state that birds and bats have nothing to fear from this new technology.

    www.sheerwinds.com
    Wouldn't the bats try to roost in the dark, cave-like tunnels, and then get sucked into the turbines and killed when the wind blows?

  8. #8
    Join Date
    Sep 2006
    Location
    Willits, CA
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    5,714

    Default Re: Underground Windmill

    Quote Originally Posted by jagec View Post
    Wouldn't the bats try to roost in the dark, cave-like tunnels, and then get sucked into the turbines and killed when the wind blows?
    That's how the bearings get greased.

  9. #9

    Default Re: Underground Windmill

    Quote Originally Posted by nsaspook View Post
    In the gap between the two horns the wind would create a vortex that would create a pressure gradient from the top of the second horn and the feed throat of the main horn. This pressure gradient would start the movement of air into the feed tube to the generator.
    This is a great example of how a vortex can cause a pressure gradient:
    http://www.youtube.com/watch?v=zgFvy...eature=related

  10. #10

    Default Re: Underground Windmill

    I swear - I don't know how you guys keep coming up with this stuff...
    This can't be very efficient... Since air is like water and electricity - it takes the least resistive path...
    There is a really big difference in the mechanical force generated by 30-60 foot radius propeller blades and a 60 foot cone.
    ..
    Has anyone seen any working prototypes?
    I am leary of this - but trying to keep an open mind - ya never know, they may actually be able to pull that rabbit out of that little itty bitty hat..
    Dave
    Phoenix, AZ

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