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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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General: China promises wind turbines with lower cut-in speed

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  1.  
    • CommentAuthorBluemoon
    • CommentTimeNov 6th 2007 edited
     
    Found this today, seems interesting if you live in a windy place.

    http://www.treehugger.com/files/2007/11/chinese_mag_lev.php
    • CommentAuthorGBP-Keith
    • CommentTimeNov 7th 2007
     
    We really do need to find a way of getting lower cut-in speeds or small scale wind energy is a dead duck for most of us.
    • CommentAuthorchuckey
    • CommentTimeNov 7th 2007
     
    Um, mag lev, so some of your generated energy ends up supporting the rotating structure? One good thing about this is that if at excessive speed, hence generated voltage the rotating structure can rise to such a height so as to rub on to a brake band and dissipate some of its excess speed. The downside is that at some critical low wind speed, the mag lev effect falls to such a low value that it is not supporting the rotating structure, the friction increases and the minimal output output falls even faster.
    Frank
  4.  
    Doesn't it use permanent magnets?
  5.  
    Wonder if it's as noisy as the (Chinese?) one on the eco-campsite on the 2nd series of 'It's not easy being green'?

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