R227ea !short name (same as file name) 431-89-0 !CAS number 1,1,1,2,3,3,3-heptafluoropropane HFC-227ea !synonym1 R-227ea !synonym2 170.02974 !molecular weight [g/mol] 0.0 !triple pt temperature [K] 257.54 !normal boiling pt [K] (calculated from ECS model) 375.95 !critical temperature [K] 2980. !critical pressure [kPa] 3.411168 !critical density [mol/L] (= 580 kg/m**3) 0.3632 !acentric factor (computed from ECS model) 1.456 !dipole moment [Debye]; Goodwin & Mehl (1997) IJT 18:795-806 IIR !default reference state 6.001 !version number ! compiled by E.W. Lemmon, NIST Physical and Chemical Properties Division, Boulder, Colorado ! 01-24-97 EWL, original version ! 06-01-97 EWL, add parameters for ECS viscosity correlation ! 06-10-97 EWL, ECS parameters for density modified ! 10-24-97 MM, read in f_int term in Eucken correlation in ECS method for t.c. ! change reference fluid EOS for ECS-transport from BWR to FEQ ! 11-25-97 MM, add dipole moment #EOS !equation of state specification ECS extended corresponding states model w/ T-dependent shape factors. ?LITERATURE REFERENCE \ ?Huber, M.L. and Ely, J.F. A predictive extended corresponding states model for ? pure and mixed refrigerants including an equation of state for R134a. ? Int. J. Refrigeration 17:18-31 (1994).\ ?\ ?ECS parameters fitted by Eric W. Lemmon, NIST, 06-11-97\ ?Average absolute deviations of the fit from the experimental data were:\ ? PVT: 0.07%; Psat: 0.30%; \ ?\ ?DATA SOURCES\ ?Defibaugh, D.R. and Moldover, M.R. Compressed and saturated liquid densities ? for 18 halogenated organic compounds. J. Chem. Eng. Data, 42(1):160-168 ? (1997).\ ?\ !end info 200.0 !lower temperature limit [K] 500.00 !upper temperature limit [K] 60000.0 !upper pressure limit [kPa] 10.1448 !maximum density [mol/L] CPP !pointer to Cp0 model R124.fld FEQ !pointer to reference fluid model 0.28810 !acentric factor for R124 used in shape factor correlation 0.2686518 !critical compressibility for R124 used in correlation 0.3632 !acentric factor for fluid used in shape factor correlation 375.95 !critical temperature [K] 2980. !critical pressure [kPa] 3.4112 !critical density [mol/L] 3 !number of temperature coefficients for 'f' shape factor -0.205562642d+1 0 !alpha1 of Huber & Ely -0.241008415d+1 1 !alpha2 of Huber & Ely (log(Tr) term) 0.152211001d+0 1 0 !number of density coefficients for 'f' shape factor 2 !number of temperature coefficients for 'h' shape factor 0.196864982d+0 0 !beta1 of Huber & Ely -0.185579467d+0 1 !beta2 of Huber & Ely (log(Tr) term) 0 !number of density coefficients for 'h' shape factor #AUX !auxiliary model specification CPP polynomial fit for ideal gas heat capacity; coefficients from Refprop v5.10 ?LITERATURE REFERENCES \ ?coefficients from Refprop v5.10 !end info 200.0 !lower temperature limit [K] 400.0 !upper temperature limit [K] 0.00 !upper pressure limit [kPa] 0.00 !maximum density [mol/L] 1.0 1.0 !reducing parameters for T, Cp0 3 0 !Nterms: polynonial, exponential 2.1655310d+1 0.00 !c(i), power of T 4.7686291d-1 1.00 -3.1536180d-4 2.00 #TRN !transport model specification ECS Extended Corresponding States model for transport props (R134a reference). ?LITERATURE REFERENCES \ ?Klein, S.A., McLinden, M.O. and Laesecke, A. (1997). An improved extended ? corresponding states method for estimation of viscosity of pure refrigerants ? and mixtures. Int. J. Refrigeration 20: 208-217. \ ?\ ?Huber, M.L., Friend, D.G. and Ely, J.F. Prediction of the thermal ? conductivity of refrigerants and refrigerant mixtures. ? Fluid Phase Equilibria 80: 249-261 (1992). \ ?\ ?The Lennard-Jones parameters are estimated.\ ? ?DATA SOURCES FOR VISCOSITY\ ?The ECS parameters for viscosity were based on the data of:\ ?\ ?Laesecke A. and Hafer, R.F. (1997). ? Viscosity of fluorinated propane isomers. II. measurements of three compounds ? and model comparisons. ? to be submitted to Journal of Chemical and Engineering Data. ? ?Average absolute deviations of the fit from the experimental data were:\ ? Laesecke: 0.82%\ ?\ !end of info section 200. !lower temperature limit [K] (based on Ttp/Tc of ref fluid) 400.00 !upper temperature limit [K] 60000.0 !upper pressure limit [kPa] 20.00 !maximum density [mol/L] (limit of ECS-thermo fit) FEQ R134a.fld VS1 !model for reference fluid viscosity TC1 !model for reference fluid thermal conductivity 0 !Lennard-Jones flag (0 or 1) (0 => use estimates) 0.00000 !Lennard-Jones coefficient Sigma [nm] 000.00 !L-J coefficient epsilon/kB [K] 1 0 0 !number of terms in f_int term in Eucken correlation, spare1, spare 2 1.3200d-3 0.0 0.0 0.0 !coeff, power of T, spare 1, spare 2 2 0 0 !number of terms in psi (visc shape factor): poly,spare1,spare2 1.1208768 0.0 0.0 0.0 !coeff, power of Tr, power of Dr, spare -0.0294857 0.0 1.0 0.0 0 0 0 !number of terms in chi (t.c. shape factor): poly,spare1,spare2 #STN !surface tension specification ST1 surface tension model ?LITERATURE REFERENCE \ ?Surface tension is based on the estimation method of: \ ?Schmidt, J.W., Carrillo-Nava, E. and Moldover, M.R. (1996). Partially ? halogenated hydrocarbons CHFCl-CF3, CF3-CH3, CF3-CHF-CHF2, CF3-CH2-CF3, ? CHF2-CF2-CH2F, CF3-CH2-CHF2, CF3-O-CHF2: Critical temperature, refractive ? indices, surface tension and estimates of liquid, vapor and critical densities. ? Fluid Phase Equilibria 122: 187-206. ? !end info 200.00 !lower temperature limit [K] 375.95 !upper temperature limit [K] 0.00 !(dummy) upper pressure limit 0.00 !(dummy) maximum density 3 !number of terms 375.95d0 !critical temperature used in correlation (dummy) 0.048731d0 1.26d0 !sigma0 and n 0.016959d0 1.76d0 != sigma0 * sigma1 -0.023732d0 2.26d0 != sigma0 * sigma2 @END c 1 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890