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  1. #1
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    Condenser's Liquid Temperature of a Freezr



    For a typical R22 Freezer which have a evaporator Temperature of -20F, what should be the discharge & liquid temperature of the condenser coil in a 85F ambient

    In an air conditioning should it should be around 150F for discharge and 45F for liquid, leaving the condenser?

    What is the basic difference in the condensing units of the above two application
    Last edited by nadeem.usmani; 03-02-2013 at 03:34 AM.



  2. #2
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    Re: Condenser's Liquid Temperature of a Freezr

    .

    There are two ways of doing this

    One is a rule of thumb way and one is the scientific way.

    Rule of thumb will have the condensing temp about 15 degs above ambient
    and subcooled liquid out of the condenser at about 4 or 5 degs below condensing temp.

    Unless you have liquid subcooling in place, free natural subcooling can never be below ambient.


    The most accurate way would be to plot the pressures and temperatures on a Ph chart
    and it will tell you exactly what you want to know.

    Oh PS my temperatures are in Centigrade so conversion will need to be done.

    Regards

    Rob

    .
    Last edited by Rob White; 03-02-2013 at 01:01 PM.
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