r125.fld

一个关于物性计算的软件

 0.109925047828d+00  1.00    3.   0
-0.993099630896d-01  3.00    3.   0
-0.104601585904d-01  1.00    4.   0
-0.769998709731d-01  2.00    4.   0
 0.149829594347d-01  1.00    5.   0
 0.166640927925d-01  2.00    5.   0
-0.181492321758d-02  1.00    6.   0
-0.853933823720d-01  1.00    0.   2
 0.133260499658d+00  2.00    0.   2
 0.410983574575d+00  1.00    2.   2
-0.452988926330d+00  2.00    2.   2


#AUX               !auxiliary model specification
CP2  ideal gas heat capacity function 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
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          8.314471                  !reducing parameters for T, Cp0
  3  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 0.439870d+01      0.00                !c(i), power of T/Tc
 0.242728d-01      1.00
-0.409900d-05      2.00


@EOS               !equation of state specification
BWR  MBWR equation of state for R-125 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
172.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
14.10              !maximum density [mol/L]
CP3                                    !pointer to Cp0 model
120.022                                !molecular weight [g/mol]
172.52                                 !triple point temperature [K]
2.921                                  !pressure at triple point [kPa]
14.095                                 !density at triple point (max density)
225.006                                !normal boiling point temperature [K]
0.30349                                !acentric factor
339.33       3629.        4.75996      !Tc [K], pc [kPa], rhoc [mol/L]
339.33                    4.75996      !reducing parameters [K, mol/L]
4.75996                                !gamma
0.08314471                             !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
  -0.523369607050d-01   0.378761878904d+01  -0.807152818990d+02
   0.115654605248d+05  -0.152175619161d+07   0.597541484451d-02
  -0.145990589966d+01  -0.992338995652d+03  -0.399180535687d+06
  -0.722591037504d-03   0.358108080969d+00  -0.108627994573d+03
   0.229821626570d-01   0.149537670449d+01   0.911199833952d+03
  -0.254479949722d+00   0.102433894096d-01  -0.645583164735d+01
   0.218649963191d+00   0.114748721552d+07  -0.118389825386d+09
   0.306539775027d+05   0.542870289406d+09   0.903502635609d+03
  -0.153646507435d+06   0.314617903718d+01   0.429297546671d+06
   0.109652021582d+00  -0.329350271819d+02  -0.338796950505d-03
   0.384533651902d+00  -0.491511706857d+02


#AUX               !auxiliary model specification
CP3  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.\
?\
?N.B. The Cp0/R(Tr) function of Outcalt & McLinden has been transformed to Cp0(T).
?\
!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
25.87069d0         0.00                !c(i), power of T
 0.2690914d0       1.00
-1.331388d-4       2.00
 4.101330d-9       3.00


@EOS               !equation of state specification
FES  short Helmholtz equation of state for R-125 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
172.52             !lower temperature limit [K]
600.0              !upper temperature limit [K]
100000.0           !upper pressure limit [kPa]
14.1               !maximum density [mol/L]
CPS                                    !pointer to Cp0 model
120.022                                !molecular weight [g/mol]
172.52                                 !triple point temperature [K]
2.9213                                 !pressure at triple point [kPa]
14.096                                 !density at triple point [mol/L]
225.03                                 !normal boiling point temperature [K]
0.304                                  !acentric factor
339.33       3629.0       4.7599607    !Tc [K], pc [kPa], rhoc [mol/L]
339.33                    4.7599607    !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
 0.112909960000E+01  0.25    1.0     0 !a(i),t(i),d(i),l(i)
-0.283492690000E+01  1.25    1.0     0
 0.299687330000E+00  1.5     1.0     0
 0.872822040000E-01  0.25    3.0     0
 0.263477470000E-03  0.875   7.0     0
 0.610569630000E+00  2.375   1.0     1
 0.900735810000E+00  2.0     2.0     1
-0.687884570000E-02  2.125   5.0     1
-0.442111860000E+00  3.5     1.0     2
-0.350414930000E-01  6.5     1.0     2
-0.126986300000E+00  4.75    4.0     2
-0.251858740000E-01 12.5     2.0     3


#AUX               !auxiliary model specification
CPS  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
150.0              !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
339.33       8.314471                  !reducing parameters for T, Cp0
  4  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 3.111514d0        0.00                !c(i), power of T/Tc
10.982115d0        1.00
-1.843797d0        2.00
 0.019273d0        3.00


#TCX               !thermal conductivity model specification
TC1  pure fluid thermal conductivity model of Perkins et al. (2001).
?LITERATURE REFERENCE \
?Unpublished; however the fit uses functional form found in:
?Marsh, K., Perkins, R., and Ramires, M.L.V.,
? "Measurement and Correlation of the Thermal Conductivity of Propane
? from 86 to 600 K at Pressures to 70 MPa,"
? submitted to J. Chem. Eng. Data, 2000.
?\
?DATA SOURCES FOR THERMAL CONDUCTIVITY\
?The ECS parameters for thermal conductivity were based on the data of:\
?\
?Perkins, R.A.,(2002) personal communication. 325 Broadway, Boulder, CO
? 80305, [e-mail]
?\
?LeNeindre, B. and Garrabos, Y. (1999). Measurements of the thermal
? conductivity of HFC-125 in the temperature range from 300 to
? 515 K at pressures up to 53 MPa, Int. J. Thermophys. 20:375-399.
?
?Yata, J., Hori, M., Kobayashi, K. and Minamiyama, T. (1996).
? Thermal conductivity of alternative refrigerants in the liquid phase,
? Int. J. Thermophys 17:561-571.
?
?Assael, M.J., Malamataris, N., and Karagiannidis, L. (1997).
? Measurements of the thermal conductivity of refrigerants in the
? vapor phase, Int.J. Thermophys. 18:341-352.
?
?Kim, D.S., Yang, M.H., Kim, M.S. and Ro, S.T. (1995). Thermal
? conductivities of pentafluoroethane  (R125) and its mixtures
? with difluoromethane (R32) in the liquid phase, Proc. 4th
? Asian Thermophysical Properties Conference, Tokyo Japan, paper C1c1
?
?Gao, X., Yamada, T., Nagasaka, Y. and Nagashima, A (1996). The
? thermal conductivity of CFC alternatives HFC-125 and HCFC-141b in the
? liquid phase, Int. J. Thermophys. 17:279-292.
?
?Assael, M.J. and Karagiannidis, L. (1995). Measurements of the thermal
? conductivity of liquid R32, R124, R125, and R141b,Int.J. Thermohpys 16:851-65.
?
?average absolute deviations of the fit from the experimental data were:\
?  Perkins:1.11%; LeNeindre:  0.67%; Yata:  1.51; Assael(1997): 1.34%
?  Kim: 1.32; Gao:  1.20%; Assael (1995): 1.93%
?  Overall: 0.98%\
?\
!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]
3   0              !# terms for dilute gas function:  numerator, denominator
339.173    1.0     !reducing parameters for T, tcx
-0.867695E-02  0.00d0     !coeff, power in T
 0.260357E-01  1.00d0
 0.219425E-03  2.00d0
10  0                     !# terms for background gas function:  numerator, denominator
339.173   4.779    1.0    !reducing par for T, rho, tcx
-0.317723E-01       0.00d0   1.00d0   0.00d0   !coeff, powers of t, rho, spare for future use
 0.318413E-01       1.00d0   1.00d0   0.00d0
 0.602258E-01       0.00d0   2.00d0   0.00d0
-0.520772E-01       1.00d0   2.00d0   0.00d0