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Archimedes reverse screw for power generation

  • 26-03-2013 11:10pm
    #1
    stunmer
    Registered Users, Registered Users 2 Posts: 279 ✭✭


    Has anybody come across the Archimedes reverse screw for power generation?

    https://www.youtube.com/watch?v=q68g28dpurA


    I like the look of the small footprint and "local" scale. Would anybody know is this sustainable for subsidy free power generation in Ireland?


Comments

  • #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 93,596 Mod ✭✭✭✭Capt'n Midnight


    There are two steps - from the video

    97% water to turning > 90% is typical for any water turbine
    80% water to wire

    The first is very high, but they are using a lot of metal turning slowly
    I would have thought a smaller impeller would be cheaper and faster
    faster means the second step of changing rotation to electricity is easier

    I'd have though a smaller propeller would be cheaper overall,
    cf small one of these
    http://en.wikipedia.org/wiki/Kaplan_turbine
    or a pelton turbine


    £100,000 for that one
    12 year payback (so the sellers say)
    And the UK pay roughly double what we pay for green energy.


    TBH judging by the hole I'd consider it a very large footprint


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