Bladeless wind turbines

  • metta

    Posts: 39165

    Aug 21, 2016 5:29 PM GMT
    Bladeless wind turbines

    http://www.upworthy.com/try-not-to-jiggle-while-watching-these-amazing-bladeless-wind-turbines?c=ufb1
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    Aug 21, 2016 6:25 PM GMT
    Well, certainly interesting. I was wondering how the electricity was generated, and one of the developers in the video clip said "with magnets" rather than through mechanical gears. But I'd still like to see how that motion is transferred.

    I would think another advantage of this approach, if it's valid, is that it would likely kill less birds. That's been a problem with bladed wind turbines.

    And also at what wind velocity this invention begins to generate. Bladed wind turbines begin with fairly low wind speed. What is the threshold for this concept?
  • metta

    Posts: 39165

    Aug 22, 2016 4:21 PM GMT
    Silent Rooftop Wind Turbines Could Generate Half Of A Household’s Energy Needs…


    silent-rooftop-wind-turbines-1.jpg

    http://www.ecosnippets.com/alternative-energy/silent-rooftop-wind-turbines/
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    Aug 22, 2016 8:32 PM GMT
    metta saidSilent Rooftop Wind Turbines Could Generate Half Of A Household’s Energy Needs…


    silent-rooftop-wind-turbines-1.jpg

    http://www.ecosnippets.com/alternative-energy/silent-rooftop-wind-turbines/

    That's somewhat like an Archimedes Screw. But solar does not have to be electrical, another source of free energy.

    My sister has a solar water heater on her roof. Great in Florida. Her pool filter pump, which runs anyway, circulates water up there. The water heats directly in the sunlight before it returns, keeping her pool at a nice temp year-round. No electricity involved. Simple and highly efficient, only a little extra energy needed for a stronger pump to raise the water. But then it siphons back down with gravity, so still very efficient.

    Some people use this method to heat their house hot water, or supplement other heating means, and also for heating with radiators for interior warmth. There are many ways for homeowners to use solar & wind to lower ultility costs.
  • transient

    Posts: 211

    Sep 04, 2016 8:27 PM GMT
    Art_Deco said
    metta saidSilent Rooftop Wind Turbines Could Generate Half Of A Household’s Energy Needs…


    silent-rooftop-wind-turbines-1.jpg

    http://www.ecosnippets.com/alternative-energy/silent-rooftop-wind-turbines/

    That's somewhat like an Archimedes Screw. But solar does not have to be electrical, another source of free energy.

    My sister has a solar water heater on her roof. Great in Florida. Her pool filter pump, which runs anyway, circulates water up there. The water heats directly in the sunlight before it returns, keeping her pool at a nice temp year-round. No electricity involved. Simple and highly efficient, only a little extra energy needed for a stronger pump to raise the water. But then it siphons back down with gravity, so still very efficient.

    Some people use this method to heat their house hot water, or supplement other heating means, and also for heating with radiators for interior warmth. There are many ways for homeowners to use solar & wind to lower ultility costs.


    It's called Passive Solar Energy and is pretty common in continental Europe......here in Portugal you can't get a new house signed off as legal unless you include passive solar heating for domestic hot water.

    I have a home made one from corrugated iron and black pipes circulating under convection and heating a bucket... the buckets connected to a shower, pressure provided by gravity.