Calculation of Thermodynamic Physical Parameters of C5F10O/CO2 and C6F12O/CO2 Mixtures

The physical parameters such as saturated vapor pressure, specific heat at constant pressure and viscosity of C
₅
F
₁₀
O, C
₆
F
₁₂
O and their CO
₂
gas mixtures are calculated. The Joback group contribution method and the Thodos method are used to calculate the specific heat at constant pressure and viscosity of the gas mixtures. The results show that the saturated vapor pressures of C
₅
F
₁₀
O/CO
₂
and C
₆
F
₁₂
O/CO
₂
mixtures with C
₅
F
₁₀
O and C
₆
F
₁₂
O gases mole fractions above 3% are significantly lower than SF
₆
, and the applicable range are smaller than SF
₆
. The specific heat at constant pressure of C
₅
F
₁₀
O/CO
₂
and C
₆
F
₁₂
O/CO
₂
mixtures with C
₅
F
₁₀
O and C
₆
F
₁₂
O gases mole fractions below 9% are similar to CO
₂
, and are higher than SF6, which can absorb more energy, lower viscosity than SF6, and have better mobility. The calculation results can provide basic data for the study of the gases ratio of C
₅
F
₁₀
O/CO
₂
or C
₆
F
₁₂
O/CO
₂
gas mixtures used in high- voltage circuit breakers and switch, as well as the calculation of gases temperature rise inside the equipment and simulation of gases flow characteristics.