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Compressibility of a Refrigerant

  1. Aug 20, 2010 #1
    I am going to be running some experiments with refrigerants. They will be at various temperatures and pressures. I will then be doing some modeling of certain phenomena. I would like to be able to quantify whether the ideal gas model is reasonable during certain stages of the experiment. My first instinct is to look at the compressibility factor Z of the different refrigerants.

    I am looking for someone to confirm that my methodology is sound here:

    1) I have data for the same experiment except it was run with other vapors as the working fluid, like methane and the like.

    2) Looking at this data, I can look at the pressures and temperatures at various stages in the experiment such as the initial conditions and final conditions (since T and P both increase from start to end).

    3) Using the temperature and pressure of these other working fluids, I can fix the stated of the current working fluids (as a preliminary estimate).

    4) I can then calculate the compressibility factor Z at these states for my current working fluid. This would give me a starting point to make a judgement call.

    Sound reasonable? I could just run the experiment with the current working fluid, however I can only retrieve a pressure history. I believe that I can retrieve temperature data at the initial and final states though. Just not the intermittent temperatures.

    Sorry, just kind of "thinking out loud" here.
  2. jcsd
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