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Compressed air Turbine

  1. Sep 6, 2016 #1
    I don't know whether this is appropriate for this part or not, but I am now looking for turbine/machinery that can be run by compressed air to produce power/electricity. Is there any manufacturer of such a machine is available?
     
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  3. Sep 6, 2016 #2

    rock.freak667

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    Are you referring to something like a gas turbine ?
     
  4. Sep 6, 2016 #3

    Bystander

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  5. Sep 6, 2016 #4
    No. A turbine that will run on compressed air.
     
  6. Sep 7, 2016 #5

    billy_joule

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    Pretty much any turbine will work. Being air (low temp, non corrosive/reactive) opens up a lot of options.
    A https://www.amazon.com/Coleman-Powe...id=1473236956&sr=1-1&keywords=air+die+grinder converts compressed air into shaft power, that could be coupled with a very small generator.

    For a bit more power there are larger options, some I've read about in small ORC systems:

    Rotary vane pump (An engineering student at MIT adapted a used car aircon pump, can't find the paper right now).
    https://en.wikipedia.org/wiki/Rotary_vane_pump

    Tesla turbine
    https://en.wikipedia.org/wiki/Tesla_turbine

    Screw compressor
    https://en.wikipedia.org/wiki/Rotary-screw_compressor

    Scroll compressor
    https://en.wikipedia.org/wiki/Scroll_compressor
    http://organicrankine.com/?page=orc_automobile

    Even a supercharger (lobe pump):
    https://en.wikipedia.org/wiki/Roots-type_supercharger

    Nearly all pump & compressor types can generate shaft power when operated in 'reverse' (ie a fluid is forced through them).
    There are plenty of manufacturers around but you'll need to know your working pressures, flow rates etc first. Or you could just scavenge some compressors from a junk yard and wing it.

    The real question is why?
    How is it that you have compressed air but need electricity?
    You are much better off, in terms of cost and power generated, to generate electricity from whatever source created the compressed air in the first place, eg if your air compressor is deisel, then buy a diesel generator, you'll get maybe ten times as much electrical power per litre of diesel burnt, much cheaper in the long term, and probably cheaper capital cost too.
     
    Last edited by a moderator: May 8, 2017
  7. Sep 7, 2016 #6
    Its better to use a wind mill to generate power.
    Because you have to spend energy on compressing air anyway.
     
  8. Sep 7, 2016 #7
    Actually, I am looking for this for a special purpose. I want to know if air is first compressed isothermally and then suddenly released adiabatically, then how much of the energy consumed during compression can be returned. Let's start with an ideal case and then go back to reality.
    I also want to know what would be the temperature of air after completion of such a process.
     
  9. Sep 7, 2016 #8

    russ_watters

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    This is a totally different question from what you asked in the OP. Please start a new thread and include the following in the opening post:
    1. A complete explanation of what you are trying to accomplish including a list of all processes and their starting and ending pressures and temperatures. We don't want to have to guess what you are trying to do.
    2. The results of your research into the principles and equations that govern the processes. We don't want to have to start from scratch.

    Thread locked.
     
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