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  1. #1

    I am a student and need some help please

    A service technician is charging an air-conditioning system that has a TXV as the metering device using the subcooling method of charging.
    The high-side saturation teperature is 110 degrees farenhieght and the unit's technical manual specifies 10 degrees farenhight of liquid subcooling.
    What would the desired liquid-line temperature be at the condensing unit. I am totaly stuck yall!

  2. #2
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  3. #3
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    Feb 2009
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    Tallahassee, FL
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    I think this exercise is trying to get you comfortable with these terms and how simple the solution actually is.

    So lets start with a question. What is your understanding of what liquid subcooling is?

  4. #4
    Join Date
    Nov 2012
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    PA
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    I think he is currently taking a test.

  5. #5
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    Feb 2012
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    EVERYWHERE
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    I think he failed a test.

  6. #6
    Join Date
    Mar 2009
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    Mid-Mo
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    Do you just want the answer or do you want us to help you figure it out?

  7. #7
    Join Date
    Dec 2012
    Location
    nc
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    7
    100 degrees

  8. #8
    I thought 100 degrees was right but I wasnt sure. I was working on some review questions out of my book, and that one just had me totally stumped. Thanks everybody!

  9. #9
    Join Date
    Apr 2012
    Location
    Texas
    Posts
    196
    TXV means you will get constant superheat ...
    which means you want to fill the condenser just enough to guarantee a liquid seal at the metering device(txv)
    110 - 10 = 100 degrees to get the manufacturers requirement.
    Economy - Quality - Speed <---- pick two

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