Function that calculates the isentropic exponent of R410A vapor based on temperature and specific volume. The isentropic exponent is equal to the ratio of specific heat capacities:
k = cp/cv
F. de Monte. (2002). Calculation of thermodynamic properties of R407C and R410A by the Martin-Hou equation of state, part I: theoretical development. International Journal of Refrigeration. 25. 306-313.
Thermodynamic properties of DuPont Suva 410A: https://www.chemours.com/Refrigerants/en_US/assets/downloads/h64423_Suva410A_thermo_prop_si.pdf
function isentropicExponentVap_Tv input Modelica.SIunits.Temperature T "Temperature of refrigerant"; input Modelica.SIunits.SpecificVolume v "Specific volume of refrigerant"; output Modelica.SIunits.IsentropicExponent k "Specific isobaric heat capacity"; end isentropicExponentVap_Tv;