R41 !short name (same as file name) 593-53-3 !CAS number fluoromethane HFC-41 !synonym1 R-41 !synonym2 34.033 !molecular weight [g/mol] 129.82 !triple pt temperature [K] 195.027 !normal boiling pt [K] 317.28 !critical temperature [K] 5897. !critical pressure [kPa] 9.30 !critical density [mol/L] 0.20162 !acentric factor (calc from vapor pressure fit of McLinden) 1.851 !dipole moment [D]; from DIPPR: Sutter & Cole (1970), J Chem Phys 52:132 IIR !default reference state 6.001 !version number ! compiled by M. McLinden, NIST Thermophysics Division, Boulder, Colorado ! 04-17-96 MM, original version ! 08-20-96 MM, add estimate for surface tension ! 10-03-96 MM, specify no rho-dependent ECS coeff (compatibility with new model) ! 10-08-96 MM, add MBWR fit of Outcalt ! 12-06-96 MM, update MBWR to fit 120 of Outcalt (12-05-96) ! 01-31-97 MM, change pointer for ECS reference viscosity from VS3 to VS1 ! 02-20-97 MM, add default reference state ! 02-26-97 MM, add version number (future use) ! 03-11-97 MM, modify ECS-transport to new format ! 06-06-97 MM, change lower limit on EOS to 135 K (convergence probs lower) ! 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 #EOS !equation of state specification BWR MBWR equation of state; Outcalt (1996). ?LITERATURE REFERENCES \ ?S.L. Outcalt, NIST, Boulder, CO (1996). MBWR equation of state as reported in:\ ?Haynes, W.M. (1996). Thermophysical properties of HCFC alternatives. National ? Institute of Standards and Technology, Boulder, Colorado, Final Report for ? ARTI MCLR Project Number 660-50800\ ?\ ?the ideal-gas contribution is based on the spectroscopic values of:\ ?Chase, M.W., Davies, C.A., Downey, J.R., Frurip, D.J., McDonald, R.A. and ? Syverd, A.N. (1985). JANAF Thermochemical Tables, Third Edition. ? J. Phys. Chem. Ref. Data 14(suppl. 1): 1-1856.\ ?\ !end info 135.00 !lower temperature limit [K] 500.00 !upper temperature limit [K] 60000.0 !upper pressure limit [kPa] 29.3811 !maximum density [mol/L] (sat liq density at 135 K) CPP !pointer to Cp0 model 34.033d0 !molecular weight [g/mol] 129.82d0 !triple point temperature [K] 0.327d0 !pressure at triple point [kPa] 29.3811 !density at 135 K [mol/L] 195.027d0 !normal boiling point temp [K] 0.20162 !acentric factor 317.28d0 5897.d0 9.30d0 !Tc [K], pc [kPa] ,rho [mol/L] 317.28d0 9.30d0 !reducing parameters [K, mol/L] 9.30d0 !gamma 0.08314471d0 !gas constant [L-bar/mol-K] 32 1 !Nterm, Ncoeff per term -0.326441485138d-1 0.338620074694d+1 -0.831696847103d+2 0.139589938388d+5 -0.156113972752d+7 -0.165160386413d-2 0.118821153813d+1 -0.137311604695d+3 0.176999573025d+6 0.164945271187d-4 0.595329911829d-1 -0.341969857376d+2 -0.168552064750d-2 -0.758216269071d-2 -0.134800586220d+2 0.311348265418d-2 -0.651499088798d-4 0.184033192190d-1 -0.281459127843d-3 -0.186344956951d+6 0.110422095705d+8 -0.147526754027d+4 0.261603025982d+8 -0.744431617418d+1 0.782355157170d+3 -0.562784094508d-2 -0.843317187588d+3 -0.600934897964d-4 0.145050417148d-1 0.222324172533d-7 -0.204419971811d-4 0.245556593457d-3 @EOS !equation of state specification ECS extended corresponding states model w/ temperature-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).\ ?\ ?shape factors fit by M.L. Huber (04-17-96), NIST, Boulder, CO \ ?based on vapor pressure and saturated liquid density data of:\ ?J.W. Magee (1996), unpublished data, NIST, Boulder, CO ?C.D. Holcomb (1996), unpublished data, NIST, Boulder, CO\ ?\ ?the ideal-gas contribution is computed with a polynomial Cp0 fit based on:\ ?Chase, M.W., Davies, C.A., Downey, J.R., Frurip, D.J., McDonald, R.A. and ? Syverd, A.N. JANAF Thermochemical Tables, Third Edition. J. Phys. Chem. Ref. ? Data 14(suppl. 1):1-1856 (1985).\ ?\ !end info 144. !lower temperature limit [K] (based on Ttp/Tc of ref fluid) 400.00 !upper temperature limit [K] 40000.0 !upper pressure limit [kPa] 28.20 !maximum density [mol/L] (sat liq density at 144 K) CPP !pointer to Cp0 model R134a.fld BWR !pointer to reference fluid model 0.32668 !acentric factor for R134a used in shape factor correlation 0.259147 !critical compressibility for R134a used in correlation 0.200388 !acentric factor for R41 used in shape factor correlation 317.28 !critical temperature [K] 5897. !critical pressure [kPa] 9.30 !critical density [mol/L] 2 !number of coefficients for 'f' shape factor -0.80833d-1 0.0d0 !alpha1 of Huber & Ely -0.71412d+0 1.0d0 !alpha2 of Huber & Ely (log(Tr) term) 0 !number of density coefficients for 'f' shape factor 2 !number of coefficients for 'h' shape factor 0.50318d+0 0.0d0 !beta1 of Huber & Ely -0.43312d-1 1.0d0 !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; based on Chase et al (1985). ?LITERATURE REFERENCES \ ?polynomial fit based on spectroscopic values of:\ ?Chase, M.W., Davies, C.A., Downey, J.R., Frurip, D.J., McDonald, R.A. and ? Syverd, A.N. JANAF Thermochemical Tables, Third Edition. J. Phys. Chem. Ref. ? Data 14(suppl. 1):1-1856 (1985).\ ? !end info 100.0 !lower temperature limit [K] 500.0 !upper temperature limit [K] 0.00 !upper pressure limit [kPa] 0.00 !maximum density [mol/L] 1.00 1.00 !reducing parameters for T, Cp0 4 0 !Nterms: polynonial, exponential 38.133739d0 0.00 !c(i), power of T -7.88701d-2 1.00 3.29302d-4 2.00 -2.37475d-7 3.00 #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.\ ? !end of info section 144. !lower temperature limit [K] (based on Ttp/Tc of ref fluid) 400.00 !upper temperature limit [K] 40000.0 !upper pressure limit [kPa] 28.20 !maximum density [mol/L] (sat liq density at 144 K) 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 0 0 0 !number of terms in psi (visc shape factor): poly,spare1,spare2 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 \ ?Estimated value based on an analysis of the homologous series: \ ? methane, (R41), R32, R23, R14.\ ?This was done by fitting the sigma_0 coefficients in the correlation: \ ? sigma = sigma_0 * (1 - T/Tc)**1.26 \ ?for the above fluids to a quadratic in the number of fluorine atoms. \ ?M.O. McLinden, NIST, 08-20-96\ ? !end info 129.82 !lower temperature limit [K] 317.28 !upper temperature limit [K] 0.00 !(dummy) upper pressure limit 0.00 !(dummy) maximum density 1 !number of terms 317.28d0 !critical temperature (dummy) 0.0633d0 1.26d0 !sigma0 and n @END c 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890