Thermodynamic Properties of R-227ea, R-365mfc, R-115, and R-13I1
Eric W. Lemmon, Roland Span
Equations of state are presented for the refrigerants 1,1,1,2,3,3,3-heptafluoropropane (R-227ea) and 1,1,1,3,3-pentafluorobutane (R-365mfc). Typical uncertainties of properties calculated with the new equations are 0.2 % in density, 1 % to 2 % in heat capacities and liquid-phase sound speeds, and 0.2 % in vapor pressure. Where data are available, uncertainties in vapor-phase sound speeds are generally less than 0.1 %. Equations of state for trifluoroiodomethane (R-13I1) and chloropentafluoroethane (R-115) are also given in an appendix for applications where systems using these banned substances are being upgraded or replaced with modern refrigerants, and properties of the old working fluids are needed in the design of the new system.
and Span, R.
Thermodynamic Properties of R-227ea, R-365mfc, R-115, and R-13I1, Journal of Chemical and Engineering Data, [online], https://doi.org/10.1021/acs.jced.5b00684
(Accessed June 3, 2023)