R404A !Short name 404A-404A !CAS number 44% R125/4% R134a/52% R143a !Full name R404A !Chemical formula R404A !Synonym 97.6038 !Molar mass [g/mol] 200.0 !Triple point temperature [K] 226.93 !Normal boiling point [K] 345.270 !Critical temperature [K] 3734.8 !Critical pressure [kPa] 4.94 !Critical density [mol/L] 0.293 !Acentric factor -1. !Dipole moment [Debye] IIR !Default reference state 10.0 !Version number ???? !UN Number :UN: halocb !Family :Family: ???? !Heating value (upper) at 25 C [kJ/mol] (ISO 6976:2016) :Heat: ???? !IUPAC Int. Chemical Identifier :InChi: ???? !InChi Key :InChiKey: ???? !Alternative fluid for mixing rules :AltID: 404a404a !Hash number from InChI Key :Hash: ! compiled by E.W. Lemmon, NIST Physical and Chemical Properties Division, Boulder, Colorado ! 11-14-02 EWL, original version ________________________________________________________________________________ #EOS !---Equation of state--- FEQ !Helmholtz equation of state for R-404A of Lemmon (2003). :DOI: 10.1023/A:1025048800563 ? ?``````````````````````````````````````````````````````````````````````````````` ?Lemmon, E.W., ? "Pseudo Pure-Fluid Equations of State for the Refrigerant Blends R-410A, ? R-404A, R-507A, and R-407C," ? Int. J. Thermophys., 24(4):991-1006, 2003. doi: 10.1023/A:1025048800563 ? ?The estimated uncertainty of density values calculated with the ? equation of state is 0.1%. The estimated uncertainty of calculated ? heat capacities and speed of sound values is 0.5%. Uncertainties of ? bubble and dew point pressures are 0.5%. ? !``````````````````````````````````````````````````````````````````````````````` 200.0 !Lower temperature limit [K] 500.0 !Upper temperature limit [K] 50000.0 !Upper pressure limit [kPa] 14.21 !Maximum density [mol/L] CPP !Pointer to Cp0 model 97.6038 !Molar mass [g/mol] 200.0 !Triple point temperature [K] 22.65 !Pressure at triple point [kPa] 14.21 !Density at triple point [mol/L] 226.93 !Normal boiling point temperature [K] 0.293 !Acentric factor 345.27 3734.8 4.94 !Tc [K], pc [kPa], rhoc [mol/L] 345.27 4.94 !Reducing parameters [K, mol/L] 8.314472 !Gas constant [J/mol-K] 22 4 0 0 0 0 0 0 0 0 0 0 !# terms and # coefs/term for normal terms, Gaussian terms, and Gao terms 6.10984 0.67 1. 0. !a(i),t(i),d(i),l(i) -7.79453 0.91 1. 0. 0.0183377 5.96 1. 0. 0.26227 0.7 2. 0. -0.00351688 6.0 2. 0. 0.0116181 0.3 4. 0. 0.00105992 0.7 6. 0. 0.850922 1.7 1. 1. -0.520084 3.3 1. 1. -0.0464225 7.0 1. 1. 0.62119 2.05 2. 1. -0.195505 4.3 2. 1. 0.336159 2.7 3. 1. -0.0376062 1.8 4. 1. -0.00636579 1.25 7. 1. -0.0758262 12.0 2. 2. -0.0221041 6.0 3. 2. 0.0310441 8.7 4. 2. 0.0132798 11.6 4. 2. 0.0689437 13.0 2. 3. -0.0507525 17.0 3. 3. 0.0161382 16.0 5. 3. #AUX !---Auxiliary function for Cp0 CPP !Ideal gas heat capacity function for R404A of Lemmon (2003). ? ?``````````````````````````````````````````````````````````````````````````````` ?Lemmon, E.W. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1.0 8.314472 !Reducing parameters for T, Cp0 1 3 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh 1.2744 0.3 0.63078 413.0 3.5979 804.0 5.0335 1727.0 #AUX !---Auxiliary function for PH0 PH0 !Ideal gas Helmholtz form for R404A. ? ?``````````````````````````````````````````````````````````````````````````````` ?Lemmon, E.W. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 1 3 3 0 0 0 0 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau)) -1.0 1.0 !ai, ti for [ai*log(tau**ti)] terms 7.00407 0.0 !aj, ti for [ai*tau**ti] terms 7.98695 1.0 -18.8664 -0.3 0.63078 -1.19617 !aj, ti for [ai*log(1-exp(ti*tau)] terms 3.5979 -2.32861 5.0335 -5.00188 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ #STN !---Surface tension--- ST1 !Surface tension model for R404A of Lemmon (2003). ? ?``````````````````````````````````````````````````````````````````````````````` ?Lemmon, E.W., preliminary equation, 2003. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 2 !Number of terms in surface tension model 345.27 !Critical temperature used in fit (dummy) 0.06868 1.3142 !Sigma0 and n -0.04576 2.3084 #PS !---Vapor pressure--- PS5 !Vapor pressure equation for R404A of Lemmon (2003) ? ?``````````````````````````````````````````````````````````````````````````````` ?Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc ? are the reducing parameters below, which are followed by rows containing Ni and ti. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 345.270 3734.8 !Reducing parameters 4 0 0 0 0 0 !Number of terms in equation -0.00026863 0.1 -6.5757 0.972 -4.1802 3.8 -7.9102 9.0 #PL !---Liquid pressure--- PL5 !Liquid pressure equation for R404A of Lemmon (2003) ? ?``````````````````````````````````````````````````````````````````````````````` ?Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc ? are the reducing parameters below, which are followed by rows containing Ni and ti. ? !``````````````````````````````````````````````````````````````````````````````` 0. ! 10000. ! 0. ! 0. ! 345.270 3734.8 !Reducing parameters 4 0 0 0 0 0 !Number of terms in equation 0.061067 0.54 -6.5646 0.965 -3.6162 3.7 -3.9771 9.0 @END c 1 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890