Authors

Generalization of data on second virial coefficient of methane and its fluoroderivatives

UDC 536.7

Generalization of data on second virial coefficient of methane and its fluoroderivatives

Kletsky A. V., Mitropov V.V.

Abstract
This is the final article dealing with collecting, analysis, approximation and generalization of experimental data on second virial coefficient of methane and its fluoroderivatives. At first stage approximation of the data on R41, R32, R23, R14 refrigerants (they are obtained when hydrogen atoms are replaced by fluorine atoms in methane molecule in a successive order) is made, second virial coefficient temperature dependence equation is being changed to find an optimum one. Then a universal equation in the form of dependence of the coefficient on refrigerant temperature, molecular mass and dipole moment is developed by simultaneous approximation of the data obtained for the above refrigerants. Temperature range for every refrigerant corresponds to the experimental one. The values of the second virial coefficient calculated according to the equation are compared with the initial data. The relative difference is shown to be within 2% for every point.

Keywords: second virial coefficient, methane, R41, R32, R23, R14 refrigerants

All references

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