r32.fld

一个关于物性计算的软件

R32                !short name
75-10-5            !CAS number
difluoromethane    !full name
CH2F2              !chemical formula
HFC-32             !synonym
52.024             !molecular weight [g/mol]
136.34             !triple point temperature [K]
221.499            !normal boiling point [K]
351.255            !critical temperature [K]
5782.              !critical pressure [kPa]
8.1500846          !critical density [mol/L]
0.2769             !acentric factor
1.978              !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, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 11-01-95  MM, original version
! 03-17-96  MM, add transport correlations compiled by S.A. Klein
! 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
! 01-31-97  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
! 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
! 05-23-97 EWL, change default EOS to that of Tillner-Roth
! 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
! 11-13-97  MM, enter thermal conductivity shape factor fitted to data
! 11-01-99 EWL, add Span 12 term short equation of state
! 05-22-02 MLH, changed transport ref fluid to propane; refit coefficients; added kfit
! 07-02-02 MLH, added dedicated fit for thermal conductivity


#EOS               !equation of state specification
FEQ  Helmholtz equation of state for R-32 of Tillner-Roth & Yokozeki (1997).
?LITERATURE REFERENCE \
?Tillner-Roth, R. and Yokozeki, A.,
? "An international standard equation of state for difluoromethane (R-32)
? for temperatures from the triple point at 136.34 K to 435 K and pressures
? up to 70 MPa,"
? J. Phys. Chem. Ref. Data, 25(6):1273-1328, 1997.
?\
?Typical uncertainties are 0.05% for density, 0.02% for the vapor
?pressure, and 0.5%-1% for the heat capacity and speed of sound in the
?liquid phase.  In the vapor phase, the uncertainty in the speed of sound
?is 0.02%
?\
!end of info section
136.340            !lower temperature limit [K]
435.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
27.4734            !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
52.024                                 !molecular weight [g/mol]
136.34                                 !triple point temperature [K]
0.480d-1                               !pressure at triple point [kPa]
27.4734                                !density at triple point [mol/L]
221.499                                !normal boiling point temperature [K]
0.2769                                 !acentric factor
351.255      5782.0       8.1500846    !Tc [K], pc [kPa], rhoc [mol/L]
351.255                   8.1500846    !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
 0.1046634d+1    0.250    1.00    0    !a(i),t(i),d(i),l(i)
-0.5451165d+0    1.000    2.00    0
-0.2448595d-2   -0.250    5.00    0
-0.4877002d-1   -1.000    1.00    0
 0.3520158d-1    2.000    1.00    0
 0.1622750d-2    2.000    3.00    0
 0.2377225d-4    0.750    8.00    0
 0.2914900d-1    0.250    4.00    0
 0.3386203d-2   18.000    4.00    4
-0.4202444d-2   26.000    4.00    3
 0.4782025d-3   -1.000    8.00    1
-0.5504323d-2   25.000    3.00    4
-0.2418396d-1    1.750    5.00    1
 0.4209034d+0    4.000    1.00    2
-0.4616537d+0    5.000    1.00    2
-0.1200513d+1    1.000    3.00    1
-0.2591550d+1    1.500    1.00    1
-0.1400145d+1    1.000    2.00    1
 0.8263017d+0    0.500    3.00    1


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function of Tillner-Roth & Yokozeki (1997).
?LITERATURE REFERENCE \
?Tillner-Roth, R. and Yokozeki, A.,
? "An international standard equation of state for difluoromethane (R-32)
? for temperatures from the triple point at 136.34 K to 435 K and pressures
? up to 70 MPa,"
? J. Phys. Chem. Ref. Data, 25(6):1273-1328, 1997.
?\
!end of info section
136.34             !lower temperature limit [K]
435.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          8.3144710                 !reducing parameters for T, Cp0
  1  4    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
0.4004486d+1      0.00d0
0.1160761d+1    798.00d0
0.2645151d+1   4185.00d0
0.5794987d+1   1806.00d0
0.1129475d+1  11510.00d0


@EOS               !equation of state specification
FES  short Helmholtz equation of state for R-32 of Span (2000).
?LITERATURE REFERENCE \
?Span, R.,
? "Multiparameter Equations of State - An Accurate Source of Thermodynamic
? Property Data," Springer, Berlin, Heidelberg, New York, 2000.
?\
?The uncertainties of the equation of state are approximately 0.2% (to
?0.5% at high pressures) in density, 1% (in the vapor phase) to 2% in
?heat capacity, 1% (in the vapor phase) to 2% in the speed of sound, and
?0.2% in vapor pressure, except in the critical region.
?\
!end of info section
136.34             !lower temperature limit [K]
600.0              !upper temperature limit [K]
100000.0           !upper pressure limit [kPa]
27.41              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
52.024                                 !molecular weight [g/mol]
136.34                                 !triple point temperature [K]
0.047922                               !pressure at triple point [kPa]
27.41                                  !density at triple point [mol/L]
221.49                                 !normal boiling point temperature [K]
0.277                                  !acentric factor
351.35       5795.0       8.2077503    !Tc [K], pc [kPa], rhoc [mol/L]
351.35                    8.2077503    !reducing parameters [K, mol/L]
8.31451                                !gas constant [J/mol-K]
      12  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 0.930809070000E+00  0.25    1.0     0 !a(i),t(i),d(i),l(i)
-0.247774910000E+01  1.25    1.0     0
 0.414704390000E+00  1.5     1.0     0
 0.548597550000E-01  0.25    3.0     0
 0.114755870000E-03  0.875   7.0     0
-0.262256540000E+00  2.375   1.0     1
 0.411188220000E+00  2.0     2.0     1
 0.349705260000E-02  2.125   5.0     1
-0.967905060000E-01  3.5     1.0     2
-0.117282100000E+00  6.5     1.0     2
-0.424283800000E-01  4.75    4.0     2
-0.126900830000E-01 12.5     2.0     3


@EOS               !equation of state specification
BWR  MBWR equation of state for R-32 of Outcalt and McLinden (1995).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "Equations of state for the thermodynamic properties of R32 (difluoromethane)
? and R125 (pentafluoroethane),"
? Int. J. Thermophysics, 16:79-89, 1995.\
?\
?ABSTRACT \
?Thermodynamic properties of difluoromethane (R32) and pentafluoroethane (R125)
? are expressed in terms of 32-term modified Benedict-Webb-Rubin (MBWR)
? equations of state.  For each refrigerant, coefficients are reported for the
? MBWR equation and for ancillary equations used to fit the ideal-gas heat
? capacity and the coexisting densities and pressure along the saturation
? boundary.  The MBWR coefficients were determined with a multiproperty fit that
? used the following types of experimental data:  PVT; isochoric, isobaric, and
? saturated-liquid heat capacities; second virial coefficients; and properties
? at coexistence.  The respective equations of state accurately represent
? experimental data from 160 to 393 K and pressures to 35 MPa for R32 and from
? 174 to 448 K and pressures to 68 MPa for R125 with the exception of the
? critical regions.  Both equations give reasonable results upon extrapolation
? to 500 K and 60 MPa.  Comparisons between predicted and experimental values
? are presented.\
?\
!end of info section
136.34             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
27.48              !maximum density [mol/L]
CP1                                    !pointer to Cp0 model
52.024                                 !molecular weight [g/mol]
136.34                                 !triple point temperature [K]
0.0477                                 !pressure at triple point [kPa]
27.48                                  !density at triple point [mol/L]
221.494                                !normal boiling point temperature [K]
0.27680                                !acentric factor
351.35       5795.        8.2078       !Tc [K], pc [kPa], rhoc [mol/L]
351.35                    8.2078       !reducing parameters [K, mol/L]
8.2078                                 !gamma
0.08314471                             !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
  -0.131275405202d-03   0.899927934911d+00  -0.281400805178d+02
   0.436091182784d+04  -0.837235280004d+06  -0.782176408963d-06
  -0.111226606825d+01   0.539331431878d+03   0.288600276863d+06
  -0.352264609289d-04   0.189661830119d+00  -0.686549003993d+02
  -0.349007064245d-02  -0.749983559476d-01  -0.321524283063d+02
   0.913057921906d-02  -0.171082181849d-03   0.503986984347d-01
  -0.830354867752d-03  -0.245522676708d+06  -0.107859056038d+08
  -0.429514279646d+04   0.808724729567d+08  -0.125945229993d+02
  -0.105735009761d+04  -0.904064745354d-01  -0.183578733048d+04
  -0.169690612464d-03   0.639250820631d-01  -0.204925767440d-06
  -0.165629700870d-03  -0.932607493424d-02


#AUX               !auxiliary model specification
CP1  ideal gas heat capacity function of Outcalt & McLinden (1995).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "Equations of state for the thermodynamic properties of R32 (difluoromethane)
? and R125 (pentafluoroethane),"
? Int. J. Thermophysics, 16:79-89, 1995.\
?\
!end of info section
120.0              !lower temperature limit [K]