Since I've got a 12vdc circuit in my house...

  1. dlgoff

    dlgoff 3,033
    Science Advisor
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    2014 Award

    I've been thinking about this for a long time and now I have the time to do it.

    Back in the old days, people would use wind chargers like this
    [​IMG] to do various task; sometimes charging a battery for light in the evening.

    Well, one of my friends has a small manufacturing business making carbon-composite components for wire industry machines. Anyway, I've helped him a lot and he lets me play if I want to test out an idea.

    So I designed/came up with a method to make a carbon blade for a "small wind charger" (I'm thinking a single blade about 14 feet in diameter; w/ a 2" aluminum spare in it). Sounds big but it'll be really easy to handle since it won't have a lot of mass.

    Also, I've been looking into surplus aircraft dc generators. I will keep a bank of batteries outside the house in a protected area and feed either 12 or 24 volts onto my existing dc circuit. Right now it has 12 incandescent bulbs, but LED.... here we come. I don't even need an inverter.

    I'm still trying to figure out how much HP my 14' blade will capture (I think around 75 @ 30mph?), so I can determine if I can spin the generator at the right rpm. i.e. I don't want anything so large that if my batteries are down, the thing can move.

    Here's a 2400watt one that's kind of cute. They say that it take 2HP/1000watts:
    http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=230494995209&viewitem=
    But it has a 120vac output :(

    I'll probably use one like this 24vdc unit:
    http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=320564732815&viewitem=. My design calls for coupling to and speeding up the generator with a belt. This way, the generator can remain stationary while the blade shaft adjust for the winds direction.

    So basically I'm reinventing the "wheel", I mean the wind charger.
     
    Last edited: Aug 2, 2010
  2. jcsd
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