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  1. #1
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    What determines the suction pressure in the refrigeration system ?? Where does the pressure come from ?

  2. #2
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    Mar 2004
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    Gone
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    1. Heat load
    2. Super heated vapor

  3. #3
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    Aug 2005
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    LA
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    born

    Vapor Determines The suction pressure.

  4. #4
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    PA
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    The amount of heat absorbed at the evap.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    Feb 2005
    Location
    Central Alabama
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    466
    the amount of heat absorbed by the refrigerant in the evaporator.
    And with the increase in refrigerant temperature the pressure will increase accordingly.

  6. #6
    Join Date
    May 2005
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    428
    the amount of heat absorbed in the evaperator (heat load)

  7. #7
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    May 2005
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    What do we get if we pass the test ?

  8. #8
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    Feb 2005
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    tomorrow off

  9. #9
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    Mar 2005
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    Suppy NC
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    the super heated vapor determins the pressure
    the more heat absorbed the higher the presure the less the lower

  10. #10
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    Mar 2005
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    Suppy NC
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    only if your not the guy on call

  11. #11
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    Feb 2005
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    Central Alabama
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    this is true

  12. #12
    Join Date
    Jun 2001
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    3,916
    What determines the suction pressure in the refrigeration system ?? Where does the pressure come from ?

    compressor capacity

  13. #13
    Join Date
    Feb 2005
    Location
    Dothan, Al
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    3,453
    Tinknocker, Hvacmarie are correct. The only thing that causes pressure is the 'vapor', expanding. More vapor = more pressure, less vapor = less pressure.

    Bama, Hvacguy, Beenthere: The heat absorbed is what causes the liquid to boil into vapor which then creates pressure.

    The compressor suction only allows the refrigerant to boil at a lower temp, but does not have anything to do with the amount of pressure produced.

    BB: The capacity of the compressor is only concerned with how much volume can be 'pumped'. Again, nothing to do with suction pressure. The capacity will change with the temp of the suction vapor, but not the pressure.
    Someone correct me on this one if I am wrong.

    Thanks all for yur replys,
    Richard

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