Added: 3 years ago
From: alliismylover
Views: 26,876
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  • Nice job! just remember to ensure those guy wires are strong and TIGHT, you might want to raise the height of your axle so you can hook up MORE guy wires. The thing that killed larger versions of this windmill were "rotation of the earth" and the "centripetal force" working at cross purposes, this is a GOOD SIZE for this model. Cheers!

  • i certainly dont belive that

  • I invented a breakthrough source of energy which violates the law of conservation of energy. I have a PROOF that there are electrodynamic phenomena which violate the law of energy conservation. Making a 6 kW generator will cost $1200 in mass production, value of energy produced yearly $5400.

    I am looking for $300 000 for a prototype and $3M for patents.

    H. Tomasz Grzybowski

    tel. +48-512-933-540

  • @henrykay01 People here are two things. Not retarded, and most importantly, broke.

  • Hehe :)

  • can´t see any generator

  • Great work. With ingenuity, talent and expertise like yours, what can we not achieve? As the creators of an online movement to promote reducing waste and carbon emissions, we applaud your initiative.

  • how possible the straight blades would make it turn. you need to give them some angle.

  • dont tell me that' s China!!!!!!

    wow, i thought it was full of... ricefields or soemthin.

    that turns horribly slow of 1KW dont you think?

    and the wind is pretty strong. it should be spinning like crazy in that wind.

  • Well it seems hard to believe but if it works that well it is brilliant. Its ingenuity is second to none.

    Is there anywhere I could get some technical designs of this or very similar, how did you go about making it? I would like to make something like this if it is that effective of producing 1kw or near too it.

    I can see it is not connected to a generator but hooking it up to a truck alternator or say a 3kva electromagnet motor wouldnt be that hard.

  • Believe it or not, my turbine is spinning counter to the drag force.

  • Not doubting your maths. But in the video the Vawt is not started, just turning in drag. Spin it up with something and then see what it will do. But you might think about a brake, as unloaded it will overspeed and destroy itself. I've been there. By the way, structure needs to withstand 2x running speed full lateral wind load pulses. Good luck!

  • great work alliismylover, thats a large turbine to construct yourself. As the other guy said, I wouldn't expect a full 1kw out of it though. Rememeber to to take your final P and then factor in the efficiency of small scale turnines, about 35%, and then the fact that VAWTS are typically about 1/3 less efficient than HAWTS, I would expect about 700 watts. Still great!

  • Thanks for the advice, though I would encourage you to explore actual data provided by nonpartison organizations about the efficiency of VAWT turbines, you may be surprised by the results.

  • I built this myself by redesigning the models NASA worked with in the 70's.

  • I am no expert, but I doubt that makes 1 kw

  • Go ahead and plug the numbers into the equation yourself.

    Average windspeed is V=7m/s

    Swept area is A=10 m^2

    Assume air density to be that at sea level (location is 37 ft above sea level) p= 1.2 kg/m^3

    Factor in the betz cooeficient 16/27

    P=(1/2)p A V^3

    do the math and there is still room for inefficiencies. Also in the winter average wind speed here is more around 11m/s

    Thats north eastern China for you

  • again, I am not expert. I do not doubt it is possible to gain 1kw with those figures, just wether the device shown can do it. Could be though. How come you know so much about this model? And are you planning on getting one (if possible)? Just being skeptic here, not negative.

  • And multiply by the efficiency of the wind machine, which I doubt is better than 30%. Only the Tesnic (a VAWT) has reached 40-45%.

  • @alliismylover

    good concept, and yes the math works in theory for the swept area but in all cases one of the big deciding factors is the ability of the rotor and alternator to harvest the theoretical power in the wind which in perfect conditions is closer to 45% but this appears to be working in the .05% area and barely supporting it's own rotation.

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