r125.fld

一个关于物性计算的软件

R125               !short name
354-33-6           !CAS number
pentafluoroethane  !full name
CHF2CF3            !chemical formula
HFC-125            !synonym
120.0214           !molecular weight [g/mol]
172.52             !triple point temperature [K]
225.06             !normal boiling point [K]
339.173            !critical temperature [K]
3617.7             !critical pressure [kPa]
4.779              !critical density [mol/L]
0.3052             !acentric factor
1.563              !dipole moment [Debye]; Meyer & Morrison (1991) J. Phys. Chem. 95:3860-3866.
IIR                !default reference state
6.1                !version number

! compiled by M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 11-01-95  MM, original version
! 03-15-96  MM, add transport correlations compiled by S.A. Klein
! 06-17-96  MM, add thermal conductivity coefficients fitted by S.A. Klein
! 07-08-96  MM, add dummy A(4) and A(5) terms to TCX correlation
! 08-19-96  MM, add surface tension fit
! 10-09-96  MM, add dipole moment value
! 01-08-97  MM, correct A(1) coefficient in thermal conductivity correlation
! 01-31-97  MM, change pointer for ECS reference viscosity from VS3 to VS1
! 02-07-97  MM, recast thermal cond model of Perkins into new TC1 form
! 02-20-97  MM, add default reference state
! 02-25-97  MM, put t.c. critical enhancement in TK1 form
! 02-26-97  MM, add version number (future use)
! 03-11-97  MM, modify ECS-transport to new format
! 03-25-97  MM, set Psi,Chi coeff in ECS-transport to 1,0 pending refit of data
! 05-15-97 EWL, add parameters for ECS viscosity correlation
! 08-21-97  MM, purge exponentials from values read by GUI (e.g. model limits)
! 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
! 10-28-97  MM, update version number, switch back to R134a/BWR ref fluid,
!               not working with FEQ for some strange reason
! 11-13-97  MM, enter thermal conductivity shape factor fitted to data
!  7-29-98 EWL, add equation of state of Sunaga
! 10-28-98 EWL, add equation of state of Piao
! 11-01-99 EWL, add Span 12 term short equation of state
! 11-02-99 EWL, change lower limit of STN to triple point temperature
! 03-17-00 EWL, change acentric factor slightly
! 05-30-00 EWL, change TRN reference fluid from BWR to FEQ R134a.
! 02-11-02 EWL, add equation of state of Lemmon and Jacobsen
! 05-08-02 MLH, changed LJ parameters to Le Neindre; refit visc and k w/ propane ref.; added kfit
! 06-17-02 EWL, add ancillary equations
! 07-05-02 MLH, update coefficients on Tc1 model


#EOS               !equation of state specification
FEQ  Helmholtz equation of state for R-125 of Lemmon and Jacobsen (2002).
?LITERATURE REFERENCE \
?Lemmon, E.W. and Jacobsen, R.T,
? preliminary formulation, 2002.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
14.09              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
120.0214                               !molecular weight [g/mol]
172.52                                 !triple point temperature [K]
2.914                                  !pressure at triple point [kPa]
14.086                                 !density at triple point [mol/L]
225.06                                 !normal boiling point temperature [K]
0.3052                                 !acentric factor
339.173         3617.7    4.779        !Tc [K], pc [kPa], rhoc [mol/L]
339.173                   4.779        !reducing parameters [K, mol/L]
8.314472                               !gas constant [J/mol-K]
  15  4      3 12      0  0            !# terms, # coeff/term for:  "normal" terms, critical, spare
  0.5280760E+01   0.669   1.   0.      !a(i),t(i),d(i),l(i)
 -0.8676580E+01   1.05    1.   0.
  0.7501127E+00   2.75    1.   0.
  0.7590023E+00   0.956   2.   0.
  0.1451899E-01   1.00    4.   0.
  0.4777189E+01   2.00    1.   1.
 -0.3330988E+01   2.75    1.   1.
  0.3775673E+01   2.38    2.   1.
 -0.2290919E+01   3.37    2.   1.
  0.8888268E+00   3.47    3.   1.
 -0.6234864E+00   2.63    4.   1.
 -0.4127263E-01   3.45    5.   1.
 -0.8455389E-01   0.72    1.   2.
 -0.1308752E+00   4.23    5.   2.
  0.8344962E-02   0.20    1.   3.
 -0.1532005E+01    4.5    2.   2.   1.7   -1. -1.  0. 0. 0. 0. 0.
 -0.5883649E-01   29.0    3.   3.   7.0   -1. -1.  0. 0. 0. 0. 0.
  0.2296658E-01   24.0    5.   3.   6.0   -1. -1.  0. 0. 0. 0. 0.


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function
?LITERATURE REFERENCE \
?Lemmon, E.W. and Jacobsen, R.T,
? preliminary formulation, 2002.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          8.314472                  !reducing parameters for T, Cp0
  1  3    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 0.3063E+01      0.10000000
 0.2303E+01    314.00000000
 0.5086E+01    756.00000000
 0.7300E+01   1707.00000000


#AUX               !auxiliary model specification
PH0  Helmholtz form for the ideal-gas state
?LITERATURE REFERENCE \
?Lemmon, E.W. and Jacobsen, R.T,
? preliminary formulation, 2002.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
 1   3   3         !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
   37.2674     0.0       !aj, ti for [ai*tau**ti] terms
    8.88404    1.0
  -49.8651    -0.1
    2.303     -0.92578   !aj, ti for [ai*log(1-exp(ti*tau)] terms
    5.086     -2.22895
    7.300     -5.03283


@EOS               !equation of state specification
FE1  Helmholtz equation of state for R-125 of Sunaga et al. (1998).
?LITERATURE REFERENCE \
?Sunaga, H., Tillner-Roth, R., Sato, H., and Watanabe, K.,
? "A Thermodynamic Equation of State for Pentafluoroethane (R-125),"
? Int. J. Thermophys., 19(6):1623-1635, 1998.
?\
?The uncertainties of the equation of state are 0.05% in density, 1% in heat
?capacity, 0.5% in the liquid speed of sound, and 0.02% in the vapor speed
?of sound.  Uncertainties are higher in the critical region.  The uncertainty
?in vapor pressure is 0.05%.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
14.09              !maximum density [mol/L]
CP1                                    !pointer to Cp0 model
120.022                                !molecular weight [g/mol]
172.52                                 !triple point temperature [K]
2.943                                  !pressure at triple point [kPa]
14.088                                 !density at triple point [mol/L]
225.018                                !normal boiling point temperature [K]
0.3061                                 !acentric factor
339.165      3629.0       4.7324657    !Tc [K], pc [kPa], rhoc [mol/L]
339.165                   4.7324657    !reducing parameters [K, mol/L]
8.314471                               !gas constant [J/mol-K]
      18  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 0.12439220d+00 -0.500   1.00    0     !a(i),t(i),d(i),l(i)
 0.27922179d+00  0.000   2.00    0
-0.11822597d+01  1.500   2.00    0
 0.23616512d+00  1.500   3.00    0
-0.11571810d-01  3.000   2.00    0
 0.12251770d+01  0.500   1.00    1
-0.21479640d+01  1.000   1.00    1
-0.29813800d+00  3.000   1.00    1
 0.33912110d+00  2.750   3.00    1
-0.63229950d-03  2.000   8.00    1
 0.12717470d-03 -1.000  10.00    1
 0.50269620d-05  1.250  12.00    1
-0.16670580d+00  4.000   1.00    2
-0.73327500d-01  4.000   2.00    2
-0.63787800d-01  3.000   4.00    2
 0.68331100d-05  0.250  15.00    2
-0.19954260d-01 23.000   3.00    3
 0.12600260d-01 14.000   4.00    3


#AUX               !auxiliary model specification
CP1  ideal gas heat capacity function
?LITERATURE REFERENCE \
?Sunaga, H., Tillner-Roth, R., Sato, H., and Watanabe, K.,
? "A Thermodynamic Equation of State for Pentafluoroethane (R-125),"
? Int. J. Thermophys., 19(6):1623-1635, 1998.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          8.314471                  !reducing parameters for T, Cp0
  1  3    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 0.5911212d+01    0.00
 0.6856764d+01    670.10271
 0.4885985d+01   1626.81842
 0.3292859d+01   1863.11546


@EOS               !equation of state specification
FE2  Helmholtz equation of state for R-125 of Piao and Noguchi (1998).
?LITERATURE REFERENCE \
?Piao, C.-C. and Noguchi, M.,
? "An international standard equation of state for the thermodynamic
? properties of HFC-125 (pentafluoroethane),"
? J. Phys. Chem. Ref. Data, 27(4):775-806, 1998.
?\
!end of info section
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
14.11              !maximum density [mol/L]
CP2                                    !pointer to Cp0 model
120.022                                !molecular weight [g/mol]
172.52                                 !triple point temperature [K]
2.9562                                 !pressure at triple point [kPa]
14.1                                   !density at triple point [mol/L]
225.054                                !normal boiling point temperature [K]
0.305                                  !acentric factor
339.165      3617.5       4.7324657    !Tc [K], pc [kPa], rhoc [mol/L]
339.165                   4.7324657    !reducing parameters [K, mol/L]
8.314471                               !gas constant [J/mol-K]
      20  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 0.853933823720d-01  1.00    0.   0    !a(i),t(i),d(i),l(i)
-0.133260499658d+00  2.00    0.   0
 0.257817782488d+00  0.00    1.   0
-0.735018179542d+00  1.00    1.   0
-0.787454743426d+00  3.00    1.   0
-0.190320468891d-01  4.00    1.   0
 0.388329449013d+00  0.00    2.   0
-0.631901774641d+00  1.00    2.   0
 0.623842653447d+00  3.00    2.   0