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Thread: Capillary tube

  1. #1
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    Exclamation Capillary tube



    Can any1 tell mec how to calculate the length and dia of capillary in refrigeration


    Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities

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    Re: Capillary tube

    this might help.

    chemi
    Attached Files Attached Files

  3. #3
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    Re: Capillary tube

    Hi Chem

    Thats the best info I have seen on cap tubes. Thx Chem

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    Re: Capillary tube

    I think that frank pointed this link in the past.

    I'm just collecting pdf's. got thousands of them.

    chemi

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    Thumbs up Re: Capillary tube

    Quote Originally Posted by chemi-cool
    this might help.

    chemi
    Way 2 go maite
    Thanx
    Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities

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    Re: Capillary tube

    Chemi, excellent cap tube reference.

    One thing to note, the principle of a cap tube that differs somewhat from an orifice is that liquid flows through much easier than vapor. A correctly sized cap tube will be slightly larger than absolutely required. This is because the size of the charge is the ultimate limiting factor.

    Another way of saying this is that in a properly sized captube system, adding excess refrigerant will flood back to the compressor NOT back up into the condenser. This is not to say you want to flood the compressor. You must limit the charge under design conditions so that this does not happen.

    This will give you the optimum design with minimum charge, allow for rapid equalization during the off cycle (important for starting with low-torque designs) and minimize refrigerant in the crankcase at initial start-up.

    (If you are designing a captube system for the first time, check with the compressor mfg for the maximum amount of refrigerant in the crankcase they will permit without voiding the warranty, because that is where it will be on initial start-up!)

    Rog

  7. #7
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    Re: Capillary tube

    Unithé Hemétique has a selection CD for his compressors with an automatic selection of the capillary tubes.
    Will try to post it somewhere.

    peter

    Attached an old schematic from UH I used many times in the past.
    Is it readable /usefull?
    Attached Images Attached Images
    Last edited by Peter_1; 26-04-2004 at 07:27 AM.

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    Re: Capillary tube

    Quote Originally Posted by chemi-cool
    this might help.

    chemi
    here are some stats given by danfoss about length of capillary tube

    Do the two results(given in my attachment and one by chemicool) resemble

    say for
    FR11G (-10/5 C)

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    Our nose is our personal air-conditioning system: it warms cold air, cools hot air and filters impurities

  9. #9
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    Re: Capillary tube

    send me a private massage with your email and I will send you a better one.
    too big to post here.

    chemi

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    Talking Re: Capillary tube

    Quote Originally Posted by chemi-cool
    this might help.

    chemi


    EXCELLENT ----- CC

    BENI JOSEPH

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    Re: Capillary tube

    hello peter,
    can you supply me such diagram for the refrigerant r134a? i am looking for it for a long time.
    thank you very much!

    Crystal

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    Re: Capillary tube

    corrct sizes of capillaries for deepfreezers

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