r134a.fld

一个关于物性计算的软件

R134a                                 !short name
811-97-2                              !CAS number
1,1,1,2-tetrafluoroethane             !full name
CF3CH2F                               !chemical formula
HFC-134a                              !synonym
102.032            !molecular weight [g/mol]
169.85             !triple point temperature [K]
247.076            !normal boiling point [K]
374.21             !critical temperature [K]
4059.28            !critical pressure [kPa]
5.017053           !critical density [mol/L]
0.32684            !acentric factor
2.058              !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
! 10-10-95  MM, original version
! 03-14-96  MM, add transport correlations compiled by S.A. Klein
! 03-15-96  MM, modify transport format to conform to new structure
! 03-18-96  MM, add dipole moment
! 06-14-96  MM, add phi0 function of Tillner-Roth (transformed to CP1 form)
! 08-19-96  MM, add surface tension fit
! 10-03-96  MM, specify no rho-dependent ECS coeff (compatibility with new model)
! 10-09-96  MM, A(4), A(5) coefficients missing from TC1 (thermal conductivity) model
! 01-17-97  MM, add revised viscosity correlation of Laesecke + collision integral
! 01-31-97  MM, change pointer for ECS reference viscosity from VS3 to VS1
!               modify ncoeff line for FEQ to accommodate critical region terms
! 02-07-97  MM, recast thermal cond model of Perkins into new TC1 form
! 02-20-97  MM, add default reference state
! 02-24-97  MM, put t.c. critical enhancement in TK1 form
! 02-26-97  MM, add version number and pointer to visc critical enhancement (both future use)
! 03-05-97  MM, modify ECS-transport to new format
! 05-14-97  MM, change power of T in collision integral to integer
! 07-11-97  MM, revert to t.c. model of Perkins until Krauss model is debugged
! 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
! 10-27-99 EWL, change upper limit to 455 K
! 10-27-99 EWL, remove the 'd-3' in the triple point pressure
! 11-01-99 EWL, add Span 12 term short equation of state
! 01-25-00  MM, change Tlow for TCX from 170 to 169.85 K
! 01-25-00 EWL, update triple point pressure and density
! 09-26-01 MLH, added new Laesecke viscosity correlation as default


#EOS               !equation of state specification
FEQ  Helmholtz equation of state for R-134a of Tillner-Roth & Baehr (1994).
?LITERATURE REFERENCE \
?Tillner-Roth, R. and Baehr, H.D.,
? "An international standard formulation of the thermodynamic properties
? of 1,1,1,2-tetrafluoroethane (HFC-134a) covering temperatures from 170 K
? to 455 K at pressures up to 70 MPa,"
? J. Phys. Chem. Ref. Data, 23:657-729, 1994.\
?\
?Typical uncertainties are 0.05% for density, 0.02% for vapor
?pressure, 0.5-1% for heat capacity, 0.05% for vapor speed of sound,
?and 1% for liquid speed of sound, except in the critical region.
?\
!end of info section
169.85             !lower temperature limit [K]
455.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
15.60              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
102.032                                !molecular weight [g/mol]
169.85                                 !triple point temperature [K]
0.3896                                 !pressure at triple point [kPa]
15.5942                                !density at triple point [mol/L]
247.076                                !normal boiling point temperature [K]
0.32684                                !acentric factor
374.21       4059.28      5.017053     !Tc [K], pc [kPa], rhoc [mol/L]
374.18                    4.978830171  !reducing parameters [K, mol/L]
8.314471                               !gas constant [J/mol-K]
      21  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
  0.5586817000d-01  -0.50   2.00   0   !a(i),t(i),d(i),l(i)
  0.4982230000d+00   0.00   1.00   0
  0.2458698000d-01   0.00   3.00   0
  0.8570145000d-03   0.00   6.00   0
  0.4788584000d-03   1.50   6.00   0
 -0.1800808000d+01   1.50   1.00   0
  0.2671641000d+00   2.00   1.00   0
 -0.4781652000d-01   2.00   2.00   0
  0.1423987000d-01   1.00   5.00   1
  0.3324062000d+00   3.00   2.00   1
 -0.7485907000d-02   5.00   2.00   1
  0.1017263000d-03   1.00   4.00   2
 -0.5184567000d+00   5.00   1.00   2
 -0.8692288000d-01   5.00   4.00   2
  0.2057144000d+00   6.00   1.00   2
 -0.5000457000d-02  10.00   2.00   2
  0.4603262000d-03  10.00   4.00   2
 -0.3497836000d-02  10.00   1.00   3
  0.6995038000d-02  18.00   5.00   3
 -0.1452184000d-01  22.00   3.00   3
 -0.1285458000d-03  50.00  10.00   4


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function
?LITERATURE REFERENCE \
?Tillner-Roth, R. and Baehr, H.D.,
? "An international standard formulation of the thermodynamic properties
? of 1,1,1,2-tetrafluoroethane (HFC-134a) covering temperatures from 170 K
? to 455 K at pressures up to 70 MPa,"
? J. Phys. Chem. Ref. Data, 23:657-729, 1994.\
?\
?Note:  Tillner-Roth et al. give a Helmholtz form for the ideal gas term; it
?has been converted to a Cp0 form by the transform: \
?\
?   Cp0/R = (1 + a3) - (3/4)*a4*Tr**(1/2) - (21/16)*a5*Tr**(3/4) \
?   where the ai are the original coefficients given by T-R and Tr = T/Tc \
?\
!end of info section
169.85             !lower temperature limit [K]
455.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
374.18       8.314471                  !reducing parameters for T, Cp0
  3  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
-0.629789d0        0.00                !c(i), power of T
 7.292937d0        0.50
 5.154411d0        0.75


@EOS               !equation of state specification
FES  short Helmholtz equation of state for R-134a 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
169.85             !lower temperature limit [K]
600.0              !upper temperature limit [K]
100000.0           !upper pressure limit [kPa]
15.6               !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
102.032                                !molecular weight [g/mol]
169.85                                 !triple point temperature [K]
0.38818                                !pressure at triple point [kPa]
15.588                                 !density at triple point [mol/L]
247.06                                 !normal boiling point temperature [K]
0.327                                  !acentric factor
374.18       4056.3       4.9788302    !Tc [K], pc [kPa], rhoc [mol/L]
374.18                    4.9788302    !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
 0.106631890000E+01  0.25    1.0     0 !a(i),t(i),d(i),l(i)
-0.244959700000E+01  1.25    1.0     0
 0.446457180000E-01  1.5     1.0     0
 0.756568840000E-01  0.25    3.0     0
 0.206520890000E-03  0.875   7.0     0
 0.420069120000E+00  2.375   1.0     1
 0.767391110000E+00  2.0     2.0     1
 0.178974270000E-02  2.125   5.0     1
-0.362197460000E+00  3.5     1.0     2
-0.678093700000E-01  6.5     1.0     2
-0.106164190000E+00  4.75    4.0     2
-0.181857910000E-01 12.5     2.0     3


@EOS               !equation of state specification
BWR  MBWR equation of state for R-134a of Huber and McLinden (1992).
?LITERATURE REFERENCES \
?Huber, M.L. and McLinden, M.O.,
? "Thermodynamic properties of R134a (1,1,1,2-tetrafluoroethane),"
? International Refrigeration Conference,
? West Lafayette, IN, July 14-17, 453-462, 1992.\
?\
?also published in: \
?\
?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.\
?\
!end of info section
169.85             !lower temperature limit [K]
600.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
15.60              !maximum density [mol/L]
CP1                                    !pointer to Cp0 model
102.032                                !molecular weight [g/mol]
169.85                                 !triple point temperature [K]
0.3922                                 !pressure at triple point [kPa]
15.60                                  !density at triple point [mol/L]
247.082                                !normal boiling point temperature [K]
0.32705                                !acentric factor
374.179      4056.        5.0308       !Tc [K], pc [kPa], rhoc [mol/L]
374.179                   5.0308       !reducing parameters [K, mol/L]
5.0308                                 !gamma
0.08314471                             !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
 0.965209362217d-01   -0.401824768889d+01    0.395239532858d+02
 0.134532868960d+04   -0.139439741347d+07   -0.309281355175d-02
 0.292381512283d+01   -0.165146613555d+04    0.150706003118d+07
 0.534973948313d-04    0.543933317622d+00   -0.211326049762d+03
-0.268191203847d-01   -0.541067125950d+00   -0.851731779398d+03
 0.205188253646d+00   -0.733050188093d-02    0.380655963862d+01
-0.105832087589d+00   -0.679243084424d+06   -0.126998378601d+09
-0.426234431829d+05    0.101973338234d+10   -0.186699526782d+03
-0.933426323419d+05   -0.571735208963d+01   -0.176762738787d+06
-0.397282752308d-01    0.143016844796d+02    0.803085294260d-04
-0.171959073552d+00    0.226238385661d+01


@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.\
?\
?the ideal-gas contribution is computed with the polynomial Cp0 fit of:\
?McLinden, M.O., et al.,
? "Measurement and formulation of the thermodynamic properties of refrigerants
? 134a (1,1,1,2-tetrafluoroethane) and 123 (1,1-dichloro-2,2,2-trifluoroethane),"
? ASHRAE Trans. 95(2):263-283, 1989.\
?\
?N.B. shape factors are unity as R134a is the reference fluid\
?
!end of info section
169.85             !lower temperature limit [K]
600.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
15.60              !maximum density [mol/L]
CP1                !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
0.32668            !acentric factor for fluid used in shape factor correlation
374.179            !critical temperature [K]
4056.0             !critical pressure [kPa]
5.0308             !critical density [mol/L]
2                         !number of temperature coefficients for 'f' shape factor
 0.0          0.0         !alpha1 of Huber & Ely
 0.0          1.0         !alpha2 of Huber & Ely (log(Tr) term)
0                         !number of density coefficients for 'f' shape factor
2                         !number of temperature coefficients for 'h' shape factor
 0.0          0.0         !beta1 of Huber & Ely
 0.0          1.0         !beta2 of Huber & Ely (log(Tr) term)
0                         !number of density coefficients for 'h' shape factor


#AUX               !auxiliary model specification
CP1  ideal gas heat capacity function of McLinden et al. (1989).
?LITERATURE REFERENCES \
?McLinden, M.O., et al.,
? "Measurement and formulation of the thermodynamic properties of refrigerants
? 134a (1,1,1,2-tetrafluoroethane) and 123 (1,1-dichloro-2,2,2-trifluoroethane),"
? ASHRAE Trans. 95(2):263-283, 1989.\
?\
?also published in (and used in fits of): \
?\
?Huber, M.L. and McLinden, M.O.,
? "Thermodynamic properties of R134a (1,1,1,2-tetrafluoroethane),"
? International Refrigeration Conference,
? West Lafayette, IN, July 14-17, 453-462, 1992.\
?
?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.\
?\
!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
  3  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
19.4006d0          0.00                !c(i), power of T
 0.258531d0        1.00
-1.29665d-4        2.00


@AUX               !auxiliary model specification
PH0  Helmholtz form for the ideal-gas state
?LITERATURE REFERENCE \
?Tillner-Roth, R. and Baehr, H.D.,
? "An international standard formulation of the thermodynamic properties
? of 1,1,1,2-tetrafluoroethane (HFC-134a) covering temperatures from 170 K
? to 455 K at pressures up to 70 MPa,"
? J. Phys. Chem. Ref. Data, 23:657-729, 1994.\
?\
!end of info section
169.85             !lower temperature limit [K]
455.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
 1   4   0         !Nterms:  ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau))
-1.629789d+0     1.00d0            !ai, ti for [ai*log(tau**ti)] terms
-1.019535d+0     0.00d0            !aj, ti for [ai*tau**ti] terms
 9.047135d+0     1.00d0
-9.723916d+0    -0.50d0
-3.927170d+0    -0.75d0


#TCX               !thermal conductivity model specification
TC1  pure fluid thermal conductivity model of Perkins et al. (2000).
?LITERATURE REFERENCE \
?Perkins, R.A., Laesecke, A., Howley, J., Ramires, M.L.V., Gurova, A.N., and
? Cusco, L.,"Experimental thermal conductivity values for the IUPAC
? round-robin sample of 1,1,1,2-tetrafluoroethane (R134a),"
? NISTIR, 2000.