1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

Wind Turbines

Post in 'The Green Room' started by Huntindog1, Sep 4, 2013.

  1. Huntindog1

    Huntindog1 Minister of Fire

    Joined:
    Dec 6, 2011
    Messages:
    1,465
    Loc:
    South Central Indiana

    Helpful Sponsor Ads!





  2. georgepds

    georgepds New Member

    Joined:
    Nov 25, 2012
    Messages:
    99
    Cool idea.. but my experience is that small windmills need to be very high off the ground to work well. I had a 1 kw system ( standard prop) that was about 50% higher than my house, and it produced next to nothing.. You really have to get the windmill up out of the earth boundary layer

    Perhaps these will work a bit better than props

    The nice thing about wind is that it often blows when the sun does not shine. Maybe this design will make it a little easier to harness on a small scale
  3. bmblank

    bmblank Minister of Fire

    Joined:
    Jan 17, 2013
    Messages:
    643
    Loc:
    Michigan
    Yes, turbines need to be substantially higher than anything surrounding it. The wind swirls off the top of trees and houses, plus the wind gradient.. I was surprised at how complex it all really was.
  4. peakbagger

    peakbagger Minister of Fire

    Joined:
    Jul 11, 2008
    Messages:
    1,588
    Loc:
    Northern NH
    Realistically if someone like a whirligig for their roof, its probably a good investment, but buying one thinking that it will generate appreciable power, its a waste of money. Better off buying the PV panel and skipping the turbine.

    The state of Maine is currently subsidizing a turbine company in southern maine, the owners mean well but they cant change to laws of physics.
  5. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    46,729
    Loc:
    South Puget Sound, WA
    These turbines are pretty low output, 500W max in a stiff wind. What do they sell for?
  6. Huntindog1

    Huntindog1 Minister of Fire

    Joined:
    Dec 6, 2011
    Messages:
    1,465
    Loc:
    South Central Indiana
    Here is some info, I have no connection with this company just sharing info.



    The problem with small wind turbines is that they deliver just that: small amounts of power. But what if you daisy-chained a whole bunch of modular wind turbines that could stack together like Legos and line sides of buildings, highways and rooftops? That’s the idea behind WindStream Technologies, a startup that plans to launch its TurboMill meter-tall wind turbine, which is about the size of a satellite dish, in the first quarter of 2011.

    Each half-a-kilowatt TurboMill has three vertical blades that WindStream CEO Dan Bates says maximizes the swept area, or the amount of space that the blades can cover. A typical house might install three TurboMills on a roof, for about $1,200, or $400 to $500 per TurboMill. Bates says with that math the TurboMills can have a return on investment in about three years. In a lot of cases that’s a better ROI than a rooftop solar panel, and Bates says it can be seven times less than solar.

    The eight-person team has been incubated at Purdue University, and has also been working with UCLA’s wind lab. So far WindStream has raised an angel round but is working on a Series A, which it hopes to close shortly. Customer wins include a pilot project to build a 150 kilometer “carbon-free” highway in Mexico, as well as orders for turbines with the governments of Brazil, Mexico and Ghana.

    According to Pike Research the global small wind market — turbines of 100 kw and under — will expand to $412 million in revenue by 2013 from $203 million in 2009, delivering a compound annual growth rate of nearly 20 percent. During that same period, worldwide installed capacity of small wind turbines will reach 115 MW from about 49 MW in 2009, the study predicts.

    About two years ago, there seemed to be a turning point for the small wind market, at least in the U.S. The U.S. Congress passed federal tax credits of up to $4,000 for small-wind systems, a major win after a 23-year hiatus in small-wind incentives, and the technology also received support from cities like San Francisco and New York.

    Today there are more than a dozen small wind players, including some more established ones. Two-decade-old Southwest Windpower is one of those leading firms, and it makes traditionally-shaped, but small, wind turbines that range between $600 and $3,000 per turbine. Southwest has raised money from GE, Altira, Rockport Capital Partners, NGP Energy Technology Partners, and the venture capital arm of Chevron Technology Ventures.

    Another small wind firm that seems to be doing well is Mariah Windpower, a vertical axis wind turbine maker, which is backed by Noventi Ventures, Greenhouse Capital, BigSky Partners and the Sierra Angels. Founded in 2005, Mariah makes a slim, 30-foot-tall turbine with straight blades that spin vertically to produce up to 1.2 kilowatts of power. The company claims the vertical axis enables the turbine to spin more slowly – just two to three times the speed of the wind – making it quieter than the usual pinwheel-shaped turbines.

    WindStream’s Bates says TurboMill doesn’t really compete with these taller wind turbines, which are effective in places with a lot of open space (like a farm). Instead, WindStream is aiming directly at urban wind, and sees the modular TurboMill scattered across city building tops, and streets. As long as cities and home owners like the aesthetics, and the ROI delivers as advertised, we could see these lego-like structures sprouting up across urban landscapes starting in 2011.


  7. billjustbill

    billjustbill Member

    Joined:
    Dec 26, 2008
    Messages:
    120
    Loc:
    Texas
  8. Huntindog1

    Huntindog1 Minister of Fire

    Joined:
    Dec 6, 2011
    Messages:
    1,465
    Loc:
    South Central Indiana

    I am not in the market for wind turbines just passing on info.

    Interesting message board for Wind Power.

    Looks like alot of the issues were due to not installing the wind generators properly.

    One guy was hooking them up in series. Poor Guy ;em

    Wasnt but one thread on the WindStream company I mentioned above.

    Thanks for the link.

    As energy costs go up I think things like this will be more common.

    Just like Computers and Satellite Dishes lots of issues when they first came out but now I am an self made expert on them. Had too. :)

Share This Page