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Superheat

johnjohn89
johnjohn89 Member Posts: 114
in A-C, Heat Pumps & Refrigeration
Service experts.
If you increase superheat(temperature ) in the refrigeration cycle will the (superheat)pressure increase, too?

Comments

  • ChrisJ
    ChrisJ Member Posts: 16,317
    johnjohn89 said:
    Service experts.
    If you increase superheat(temperature ) in the refrigeration cycle will the (superheat)pressure increase, too?
    No?

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • jumper
    jumper Member Posts: 2,385
    Don't think so. If evaporator ices up will superheat increase?
  • ch4man
    ch4man Member Posts: 297
    johnjohn89 said:

    Service experts.
    If you increase superheat(temperature ) in the refrigeration cycle will the (superheat)pressure increase, too?

    are you increasing the suction line temp or the suction saturation temp? stop thinking in terms of pressure
  • ratio
    ratio Member Posts: 3,791
    My Old Guy told me to think about everything in terms of temperature & not pressure. Doing it that way you'll be able to work on any refrigerant, because the evaporator & condenser temperatures aren't going to change much for air conditioning.
    SuperTech
  • ChrisJ
    ChrisJ Member Posts: 16,317
    ratio said:

    My Old Guy told me to think about everything in terms of temperature & not pressure. Doing it that way you'll be able to work on any refrigerant, because the evaporator & condenser temperatures aren't going to change much for air conditioning.

    But superheat is literally a function of temperature and pressure?
    I'm not understanding how someone can think of everything by temperature and ignore pressure in refrigeration?

    Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.

  • pecmsg
    pecmsg Member Posts: 5,298
    johnjohn89 said:

    Service experts.
    If you increase superheat(temperature ) in the refrigeration cycle will the (superheat)pressure increase, too?

    Superheat is the measurement of the Vapor above its Saturated temperature.

    So, NO you won't raise the pressure. If the pressure changes the temperature would change
  • ratio
    ratio Member Posts: 3,791
    ChrisJ said:

    ratio said:

    My Old Guy told me to think about everything in terms of temperature & not pressure. Doing it that way you'll be able to work on any refrigerant, because the evaporator & condenser temperatures aren't going to change much for air conditioning.

    But superheat is literally a function of temperature and pressure?
    I'm not understanding how someone can think of everything by temperature and ignore pressure in refrigeration?
    Sorry, I wasn't clear. Temperature & saturated temperature might be clearer. No matter what refrigerant we're using, a saturated condensing temperature of 25° is a problem, whether it's 87 PSIG (410A) or 48 PSIG (22) or however many thousands CO₂ will be.
    ch4man

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