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  1. #1
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    Piston,rotative,scroll...which technology??



    Hi everybody...
    I am trying to understand wich is the best technology for every range of appliance...
    I know that piston technology is cheap and reliable for low power appliances and scroll technology is good for medium to high power uses, but what would you call exactly low, medium and high power?
    Thanks to all!



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    Re: Piston,rotative,scroll...which technology??

    Hi,
    Low power - Low Bach pressure application
    Medium - Medium Back pressure application
    High - High Back Pressure application

    According to the Back pressure to the compressor the classification as made.

    Best regards,
    ravi perumal

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    Re: Piston,rotative,scroll...which technology??

    Hi, alejo78

    Welcome to RE.

    Quote Originally Posted by alejo78
    Hi everybody...
    I am trying to understand wich is the best technology for every range of appliance...
    I know that piston technology is cheap and reliable for low power appliances and scroll technology is good for medium to high power uses, but what would you call exactly low, medium and high power?
    Thanks to all!
    What you mean here with power

    refrigeration capacity -low, medium, high
    evaporating temperature -low,medium,high




    Hi, Raviperumal

    Quote Originally Posted by raviperumal View Post
    Hi,
    Low power - Low Bach pressure application
    Medium - Medium Back pressure application
    High - High Back Pressure application

    According to the Back pressure to the compressor the classification as made.

    Best regards,
    ravi perumal
    Very interesting, this is an engineering forum can you put some numbers to explain classification of power

    Sorry I do not understand your explanation.

    Best regards, Josip

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  4. #4
    alejo78's Avatar
    alejo78 Guest

    Re: Piston,rotative,scroll...which technology??

    Hi to all...and thanks for your answers...
    Perhaps it was not so clear, I was talking about compressors for refrigerating systems...
    What I know is that piston (reciprocal) compressors are used for air cooling appliances until 17000m3/h...
    and that scroll compressors are used only when there is involved a big amount of cooled air (big industrial uses)...but in the middle there is the rotary compressor, or roller compressor, that works in lower mass rates...can you help?

    Thanks to alle!

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    Re: Piston,rotative,scroll...which technology??

    It really depends on the application.You then have to look at cost and energy efficiency.Other thing that come to mind are hermetically sealed or semi this will affect leak testing when F gas comes to pass.On larger chillers we used to use recips for heatpumps because you couldn't get the correct VI with a screw and that hit the COP.Also trend has a big part to play it is 'uncool'to have recips and cool to have screws or scrolls,even though you can service and repair a recip but generally have to completely replace a srew or scroll.

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