Prediction of the Inversion Curve and the Maximum Value of μJ–T for Some Refrigerants

In the present work, the thermodynamic states of the inversion curve have been obtained using only p v-T data. We have also shown a linear relationship between compressibility factor and pressure for each branch of the inversion curve. These lines can be used to find the maximum inversion pressure, Pin. Finally, we have predicted the temperature at which the Joule-Thomson coefficient, mJ-T, Has its maximum value for each isobar, by using the specific heat capacity, isobaric expansivity, or compressibility factor.