r152a.fld

一个关于物性计算的软件

R152a              !short name
75-37-6            !CAS number
1,1-difluoroethane !full name
CHF2CH3            !chemical formula
HFC-152a           !synonym
66.051             !molecular weight [g/mol]
154.56             !triple point temperature [K]
249.127            !normal boiling point [K]
386.411            !critical temperature [K]
4516.75            !critical pressure [kPa]
5.571450           !critical density [mol/L]
0.27521            !acentric factor
2.262              !dipole moment [Debye]; Meyer & Morrison (1991) J. Chem. Eng. Data 36:409-413.
IIR                !default reference state
6.1                !version number

! compiled by M. McLinden and S.A. Klein
! NIST Thermophysics Division, Boulder, Colorado
! 11-01-95  MM, original version
! 01-24-96 SAK, add transport models
! 03-13-96  MM, modify transport data to fit new program structure
! 03-15-96  MM, ditto + correct term in conductivity correlation
! 03-18-96  MM, add dipole moment
! 06-17-96  MM, add ECS-thermal conductivity coefficients fitted by S.A. Klein
! 08-19-96  MM, add surface tension fit
! 01-21-97  MM, recast viscosity model in terms of new VS1 (composite model)
! 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
! 02-26-97  MM, put t.c. critical enhancement into TK1 form
! 02-26-97  MM, add version number and pointer to visc critical enhancement (both future use)
! 03-06-97  MM, modify ECS-transport to new format
! 03-20-97  MM, use Krauss correlation for thermal conductivity (at least temp)
!               N.B.  critical enhancement not yet implemented
! 03-25-97  MM, set Psi,Chi coeff in ECS-transport to 1,0 pending refit of data
!               go back to Perkins t.c. correlation
! 05-14-97  MM, change power of T in collision integral to integer
! 08-21-97  MM, purge exponentials from values read by GUI (e.g. model limits)
! 09-23-97  MM, add critical enhancement for Krauss t.c. corr and use it
! 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
! 11-02-98 EWL, add Tillner-Roth equation of state
! 10-06-99 EWL, fix cp0 part of Tillner-Roth equation of state
! 11-01-99 EWL, add Span 12 term short equation of state
! 01-24-00 EWL, change transport limits to match eos
! 07-09-01 EWL, add Helmholtz form of BWR equation
! 11-28-01 MLH, add viscosity ECS fit as NIST recommended. Kraus ref has asymptote
!               that occurs at approximately 220 K on the liquid sat line.
! 07-05-02 MLH, changed crit model to TK6


#EOS               !equation of state specification
BWR  MBWR equation of state for R-152a of Outcalt and McLinden (1996).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "A modified Benedict-Webb-Rubin equation of state for the thermodynamic
? properties of R152a (1,1-difluoroethane),"
? J. Phys. Chem. Ref. Data, 25(2):605-636, 1996.\
?\
?The uncertainties of the equation of state are 0.1% in density, 2% in heat
?capacity, and 005% in the vapor speed of sound, except in the critical region.
?The uncertainty in vapor pressure is 0.1%.
?\
?ABSTRACT \
?A modified Benedict-Webb-Rubin (MBWR) equation of state has been developed for
? R152a (1,1-difluoroethane).  The correlation is based on a selection of
? available experimental thermodynamic property data.  Single-phase
? pressure-?volume-temperature (PVT), heat capacity, and sound speed data, as well
? as second virial coefficient, vapor pressure, and saturated liquid and saturated
? vapor density data, were used with multi-property linear least-squares fitting
? to determine the 32 adjustable coefficients of the MBWR equation.  Ancillary
? equations representing the vapor pressure, saturated liquid and saturated
? vapor densities, and the ideal gas heat capacity were determined.
? Coefficients for the equation of state and the ancillary equations are given.
? Experimental data used in this work covered temperatures from 162 K to 453 K
? and pressures to 35 MPa.  The MBWR equation established in this work may be
? used to predict thermodynamic properties of R152a from the triple-point
? temperature of 154.56 K to 500 K and for pressures up to 60 MPa except in the
? immediate vicinity of the critical point.\
?\
!end of info section
154.56             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
18.07              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
66.051                                 !molecular weight [g/mol]
154.56                                 !triple point temperature [K]
0.0641                                 !pressure at triple point [kPa]
18.061                                 !density at triple point [mol/L]
249.127                                !normal boiling point temperature [K]
0.27521                                !acentric factor
386.411      4516.75      5.57145      !Tc [K], pc [kPa], rhoc [mol/L]
386.411                   5.57145      !reducing parameters [K, mol/L]
5.57145                                !gamma
0.08314471                             !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
  -0.101623317192d-01   0.215677129618d+01  -0.648581254334d+02
   0.122535596303d+05  -0.206805988259d+07  -0.379836507323d-03
  -0.441333232984d+00   0.158248874708d+03   0.564062216256d+06
  -0.124115350431d-03   0.494972178825d+00  -0.208058039834d+03
  -0.131403187106d-01   0.212083848812d+00  -0.151263785082d+03
   0.311108025395d-01  -0.115280979645d-02   0.437040025765d+00
  -0.965596535032d-02  -0.242705525346d+06  -0.518042519989d+08
  -0.119070545681d+05   0.459333195257d+09  -0.719317286511d+02
  -0.840102861460d+04  -0.102910957390d+01  -0.325913880841d+05
  -0.412362182230d-02   0.175102808144d+01  -0.198636624640d-04
  -0.421363036104d-02  -0.198696760653d+01


@EOS               !equation of state specification
FE1  Helmholtz transform of MBWR EOS for R-152a of Outcalt and McLinden (1996).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "A modified Benedict-Webb-Rubin equation of state for the thermodynamic
? properties of R152a (1,1-difluoroethane),"
? J. Phys. Chem. Ref. Data, 25(2):605-636, 1996.\
?
?The equation here is the same as the Outcalt and McLinden BWR equation,
? but has been transformed into the fundamental Helmholtz energy form.
?\
!end of info section
154.56             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
18.07              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
66.051                                 !molecular weight [g/mol]
154.56                                 !triple point temperature [K]
0.0641                                 !pressure at triple point [kPa]
18.061                                 !density at triple point [mol/L]
249.127                                !normal boiling point temperature [K]
0.27521                                !acentric factor
386.411      4516.75      5.57145      !Tc [K], pc [kPa], rhoc [mol/L]
386.411                   5.57145      !reducing parameters [K, mol/L]
8.314471                               !gas constant [J/mol-K]
      40  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 -0.354657949982E+01   3.000   0.00  0 !a(i),t(i),d(i),l(i)
 -0.364631280620E+00   4.000   0.00  0
  0.333233335558E-01   5.000   0.00  0
 -0.680968435117E+00   0.000   1.00  0
  0.735212646801E+01   0.500   1.00  0
 -0.112473063838E+02   1.000   1.00  0
  0.549916715657E+01   2.000   1.00  0
 -0.240186327322E+01   3.000   1.00  0
 -0.709036447042E-01   0.000   2.00  0
 -0.213200886814E+00   1.000   2.00  0
  0.197839736368E+00   2.000   2.00  0
  0.182494769909E+01   3.000   2.00  0
 -0.860546479693E-01   0.000   3.00  0
  0.888137366540E+00   1.000   3.00  0
 -0.966127346370E+00   2.000   3.00  0
 -0.985223479324E-01   1.000   4.00  0
  0.183419368472E-01   2.000   5.00  0
 -0.338550204252E-01   3.000   5.00  0
  0.124921101016E-01   2.000   6.00  0
 -0.221056706423E-02   2.000   7.00  0
  0.216879133161E-02   3.000   7.00  0
 -0.233597690478E-03   3.000   8.00  0
  0.354657949982E+01   3.000   0.00  2
  0.364631280620E+00   4.000   0.00  2
 -0.333233335558E-01   5.000   0.00  2
  0.276133830254E+01   3.000   2.00  2
 -0.691185711880E-01   4.000   2.00  2
 -0.333233335558E-01   5.000   2.00  2
  0.782761327717E+00   3.000   4.00  2
 -0.345592855940E-01   4.000   4.00  2
  0.137813531906E+00   5.000   4.00  2
  0.186173126153E+00   3.000   6.00  2
 -0.341119393297E-01   4.000   6.00  2
  0.459378439687E-01   5.000   6.00  2
  0.216470012607E-01   3.000   8.00  2
 -0.852798483242E-02   4.000   8.00  2
  0.620394038634E-02   5.000   8.00  2
  0.185210290813E-02   3.000  10.00  2
  0.101674662734E-02   4.000  10.00  2
  0.124078807727E-02   5.000  10.00  2


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function of Outcalt & McLinden (1996).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "A modified Benedict-Webb-Rubin equation of state for the thermodynamic
? properties of R152a (1,1-difluoroethane),"
? J. Phys. Chem. Ref. Data, 25(2):605-636, 1996.\
?\
!end of info section
150.0              !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          1.0                       !reducing parameters for T, Cp0
  4  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
27.89465d0         0.00                !c(i), power of T
 9.134686d-2       1.00
 2.079961d-4       2.00
-2.317613d-7       3.00


@EOS               !equation of state specification
FE2  Helmholtz equation of state for R-152a of Tillner-Roth (1995).
?LITERATURE REFERENCE \
?Tillner-Roth, R.,
? "A Fundamental Equation of State for 1,1-Difluoroethane (HFC-152a),"
? Int. J. Thermophys., 16(1):91-100, 1995.
?\
?The uncertainties of the equation of state are 0.1% in density, 2% in heat
?capacity, and 005% in the vapor speed of sound, except in the critical region.
?The uncertainty in vapor pressure is 0.1%.
?\
!end of info section
154.56             !lower temperature limit [K]
435.0              !upper temperature limit [K]
30000.0            !upper pressure limit [kPa]
18.03              !maximum density [mol/L]
CP1                                    !pointer to Cp0 model
66.051                                 !molecular weight [g/mol]
154.56                                 !triple point temperature [K]
0.065395176                            !pressure at triple point [kPa]
18.020671                              !density at triple point [mol/L]
249.13236                              !normal boiling point temperature [K]
0.26744                                !acentric factor
386.41       4495.0       5.5714524    !Tc [K], pc [kPa], rhoc [mol/L]
386.41                    5.5714524    !reducing parameters [K, mol/L]
8.314471                               !gas constant [J/mol-K]
      19  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 0.3552260d+00  0.000   1.00    0      !a(i),t(i),d(i),l(i)
-0.1425660d+01  1.500   1.00    0
-0.4631621d-01  3.000   1.00    0
 0.6903546d-01 -0.500   1.50    0
 0.1975710d-01 -0.500   3.00    0
 0.7486977d-03 -0.500   6.00    0
 0.4642204d-03  1.500   6.00    0
-0.2603396d+00  3.000   1.00    1
-0.7624212d-01  4.000   1.00    1
 0.2233522d+00  3.000   3.00    1
 0.1992515d-01  2.000   4.00    1
 0.3449040d+00  4.000   1.00    2
-0.4963849d+00  5.000   1.00    2
 0.1290719d+00  6.000   1.00    2
 0.9760790d-03  5.000   8.00    2
 0.5066545d-02 12.500   2.00    3
-0.1402020d-01 25.000   3.00    3
 0.5169918d-02 20.000   5.00    3
 0.2679087d-03 25.000   6.00    3


@EOS               !equation of state specification
FES  short Helmholtz equation of state for R-152a of Span (2000).
?LITERATURE REFERENCE \
?Span, R.,
? "Multiparameter Equations of State - An Accurate Source of Thermodynamic