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Novel wind turbine designs

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Comments

  • #52
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]






    Link

    Oh dear, oh dear google trackers are bombarding me with chocy-pots now :pac:


  • #53
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    Here we are:
    Sheerwind Invelox; Mythbusted
    Clean Technica wrote:
    It makes the extraordinary claim of generating six times the energy of a comparable wind turbine, but in fact is likely generating about eighteen times less for perhaps ten times the material.


  • #54
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    hysteria.gif

    sheerwindcla.jpg

    Anyone recognise that turbine at the funnel mouth? hysteria.gif


  • #55
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    519f98feb3fc4b39ee00002d_straw-scraper-belatchew-arkitektur_belatchew_arkitekter_strawscraper-1-528x388.jpg

    Link


  • #56
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    This exposé says it all really.

    Saphon patent here for those interested.

    Questionable how long the rams can sustain life atop a mast.
    recedite wrote: »
    The stresses on the structural frame of a large scale version would probably be enormous.

    There's probably a limit on how upscalable the design concept is alright.


  • #57
    recedite
    Closed Accounts Posts: 13,992 ✭✭✭✭recedite


    A rooftop mounted Sheerwind invelox might be useful for pumping fresh air into a building (in hot countries). That's about it, though.


  • #58
    Thargor
    Registered Users, Registered Users 2 Posts: 17,964 ✭✭✭✭Thargor


    Sir Liamalot wrote: »
    Questionable how long the rams can sustain life atop a mast.
    First thing I thought aswell, would the lifespan without maintenance be measured in weeks even?


  • #59
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    Good thread here on solar trackers. He's having troubles with water ingress to the rams after a year.


  • #60
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    recedite wrote: »
    A rooftop mounted Sheerwind invelox might be useful for pumping fresh air into a building (in hot countries). That's about it, though.

    Better off with solar PV and air con. I reckon.

    [Edit]: It's not a real product by the way just a scam to generate revenue from gullible investors.


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  • #61
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,455 Mod ✭✭✭✭Capt'n Midnight


    recedite wrote: »
    A rooftop mounted Sheerwind invelox might be useful for pumping fresh air into a building (in hot countries). That's about it, though.
    Passive windcatchers have been in use for over three thousand years. http://en.wikipedia.org/wiki/Windcatcher


  • #62
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 92,455 Mod ✭✭✭✭Capt'n Midnight


    Sir Liamalot wrote: »
    Good thread here on solar trackers. He's having troubles with water ingress to the rams after a year.
    Panels keep getting cheaper. There's a lot to be said for just buying more panels than trying to chase 25% extra light. No moving parts means more reliable. Also no spend on motors or electronics or maintenance and no problems with them and waterproofing is easier. And there is the electricity used for the motors.

    Simplest tracking system I saw was two smaller panels at 90 degrees to the main one each wired to a simple motor. One pushing clockwise, the other anti-clockwise. bit like the way some windmills had a smaller wind powered rotor to keep them into the wind.

    Another system is to just change the vertical angle manually every month or so. Low tech approach that gets about half the benefits of a full 2D tracker.

    Also in Ireland it's cloudy so good bit of diffuse light which might confuse a 2D tracker.


  • #63
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    My tracker involves a DC clamp meter, UPVC window slides and two vice grips. :D
    I may upgrade to a car window regulator some day.

    Some trackers use the panel output to find the hot-spot others use photo-sensors. Either way they ought to have a limited time delay to prevent unnecessary running due to cloud, brief shadows etc...

    The increased output pays for the actuator draw and then some...dunno if it's worth the materials and maintenance though. Probably if off-gridding it is and/or limited space is an issue.
    Trackers generally have better ventilation of the modules so they perform better too.

    I'm looking forward to seeing the annual test results of the fixed array versus the trackers versus expense on that thread. Due any week now.
    Capt'n Midnight wrote: »

    Simplest tracking system I saw was two smaller panels at 90 degrees to the main one each wired to a simple motor.

    Any links?


  • #64
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]




    Link


  • #65
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]


    Capt'n Midnight wrote: »
    Two blades would of course be even more efficient and several single bladed designs have been used but three blades seems to be the best compromise given that more vibration means you need to spend more on the tower. Though offshore means you need to stand up to waves so perhaps we may see two blades in use there some time.

    MingYang6.5-20141103112715261.jpg

    Link


  • #66
    [Deleted User]
    Posts: 5,238 ✭✭✭ [Deleted User]




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