r236fa.fld

一个关于物性计算的软件

R236fa                                !short name
690-39-1                              !CAS number
1,1,1,3,3,3-hexafluoropropane         !full name
CF3CH2CF3                             !chemical formula
HFC-236fa                             !synonym
152.0393           !molecular weight [g/mol]
179.52             !triple point temperature [K]
271.71             !normal boiling point [K]
398.07             !critical temperature [K]
3200.0             !critical pressure [kPa]
3.626              !critical density [mol/L]
0.37721            !acentric factor
1.982              !dipole moment [Debye]; Goodwin & Mehl (1997) IJT 18:795-806
IIR                !default reference state
6.1                !version number

! compiled by M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 05-29-97  MM, original version
! 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
! 11-25-97  MM, add dipole moment
! 05-21-02  MLH, added new tranpsort coefficients


#EOS               !equation of state specification
BWR  MBWR equation of state for R-236fa of Outcalt and McLinden (1995).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "An equation of state for the thermodynamic properties of R236fa,"
? NIST report to sponsor (U.S. Navy, David Taylor Model Basin) under
? contract N61533-94-F-0152, 1995.
?\
!end of info section
179.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
40000.0            !upper pressure limit [kPa]
11.30              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
152.0393                               !molecular weight [g/mol]
179.52                                 !triple point temperature [K]
0.162                                  !pressure at triple point [kPa]
11.29                                  !density at triple point [mol/L]
271.71                                 !normal boiling point temperature [K]
0.37721                                !acentric factor
398.07       3200.0       3.626        !Tc [K], pc [kPa], rhoc [mol/L]
398.07                    3.626        !reducing parameters [K, mol/L]
3.626                                  !gamma
0.08314471                             !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
  -0.661121874831d-01    0.861763902745d+01   -0.233732255968d+03
   0.437486232843d+05   -0.539677761508d+07   -0.757588552002d-02
   0.107379563512d+02   -0.106626588551d+05   -0.103047455432d+06
  -0.194868091617d-02    0.438365228107d+01   -0.111207843880d+04
  -0.263710051508d+00    0.477521163113d+02    0.197804035098d+04
  -0.485710898935d+01    0.144821196401d+00   -0.221059322936d+02
   0.926270169913d+00    0.577920666161d+07   -0.985511065626d+09
   0.197199808018d+06    0.319420123094d+10    0.792946107314d+04
  -0.693606295610d+06    0.849836259084d+02    0.209702051124d+07
   0.110600369167d+01    0.953714711849d+02   -0.881815206562d-02
   0.973194908842d+01   -0.935516922205d+03


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function of Outcalt & McLinden (1995).
?LITERATURE REFERENCE \
?Outcalt, S.L. and McLinden, M.O.,
? "An equation of state for the thermodynamic properties of R236fa,"
? NIST report to sponsor (U.S. Navy, David Taylor Model Basin) under
? contract N61533-94-F-0152, 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]
1.0          1.0                       !reducing parameters for T, Cp0
  3  0    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
53.4662555d+0      0.00                !c(i), power of T
 0.228092134d+0    1.00
 0.352999168d-4    2.00


#TRN               !transport model specification
ECS  Extended Corresponding States model (R134a reference); fitted to data.
?LITERATURE REFERENCES \
?Klein, S.A., McLinden, M.O., and Laesecke, A.,
? "An improved extended corresponding states method for estimation of
? viscosity of pure refrigerants and mixtures,"
? Int. J. Refrigeration, 20:208-217, 1997.
?\
?McLinden, M.O., Klein, S.A., and Perkins, R.A.,
? "An extended corresponding states model for the thermal conductivity
? of refrigerants and refrigerant mixtures,"
? Int. J. Refrigeration, 23:43-63, 2000.
?
?\
?DATA SOURCES FOR THERMAL CONDUCTIVITY\
?The ECS parameters for thermal conductivity were based on the data of:\
?\
?Perkins, R., Cusco, L., Howley, J., Laesecke, A., Matthes, S. and Ramires, M.L.V. (2001).
? "Thermal conductivities of alternatives to CFC-11 for foam insulation".
? J. Chem. Eng. Data, 46(2):428-432.
?
?Geller, V., Bivens, D.B. and Yokozeki, A. (1999). "Transport properties and surface tension
? of hydrofluorocarbons HFC236fa and HFC 245fa", Proc. 20th Int. Congress of Refrig,IIR/IIF,Sydney.
?
?Perkins, R., (2002), NIST Div. 838.07, 325 Broadway, Boulder CO 80305,
? [e-mail],personal communication.
?
?Average absolute deviations of the fit from the experimental data were:\
?  Perkins(2001):  1.17%; Geller: 13.43% ;Perkins(2002):1.08%
?  Overall:  1.41%\
?\
?DATA SOURCES FOR VISCOSITY\
?The ECS parameters for viscosity were based on the data of:\
?\
?Laesecke, A. and Defibaugh, D.R. (1996).
? "Viscosity of 1,1,1,2,3,3-hexafluoropropane and 1,1,1,3,3,3-hexafluoropropane at
? saturated-liquid conditions from 262K to 353K,"
? J. Chem. Eng. Data, 41(1):59-62.
?
?Geller, V., Bivens, D.B. and Yokozeki, A. (1999). "Transport properties and surface tension
? of hydrofluorocarbons HFC236fa and HFC 245fa", Proc. 20th Int. Congress of Refrig,IIR/IIF,Sydney.
?
?Average absolute deviations of the fit from the experimental data were:\
?   Laesecke:  0.49%; Geller: 5.80%;
?   Overall: 3.18%\
?\
?\Lennard-Jones parameters are estimated.
?\
!end of info section
179.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
11.30              !maximum density [mol/L]
FEQ R134a.fld
VS1                !model for reference fluid viscosity
TC1                !model for reference fluid thermal conductivity
1                  !Lennard-Jones flag (0 or 1) (0 => use estimates)
0.5644             !Lennard-Jones coefficient sigma [nm] for ECS method  !from scaling R134a
307.24             !Lennard-Jones coefficient epsilon/kappa [K] for ECS method !from scaling R134a
2  0  0                           !number of terms in f_int term in Eucken correlation, spare1, spare2
 1.00946d-03     0.0   0.0   0.0  !coeff, power of T, spare 1, spare 2
 1.21255d-06     1.0   0.0   0.0  !coeff, power of T, spare 1, spare 2
2  0  0                           !number of terms in psi (visc shape factor): poly,spare1,spare2
  1.10195        0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
-2.94253d-02     0.0   1.0   0.0  !coeff, power of Tr, power of Dr, spare
2  0  0                           !number of terms in chi (t.c. shape factor): poly,spare1,spare2
 1.162720        0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
-4.37246d-02     0.0   1.0   0.0  !coeff, power of Tr, power of Dr, spare
TK6                               !pointer to critical enhancement auxiliary function


@AUX               !thermal conductivity critical enhancement model
TK6  simplified thermal conductivity critical enhancement of Olchowy and Sengers
?LITERATURE REFERENCE \
?Olchowy, G.A. and Sengers, J.V.,
? "A simplified representation for the thermal conductivity of fluids in the
? critical region,"
? Int. J. Thermophysics, 10:417-426, 1989.
?\
?as applied to CO2 by:
?\
?Vesovic, V., Wakeham, W.A., Olchowy, G.A., Sengers, J.V., Watson, J.T.R.
? and Millat, J.,
? "The transport properties of carbon dioxide,"
? J. Phys. Chem. Ref. Data, 19:763-808, 1990.
?\
!end of info section
179.52             !lower temperature limit [K]
500.0              !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
11.3            !maximum density [mol/L]
9  0  0  0         !# terms:  CO2-terms, spare, spare, spare
1.0     1.0     1.0      !reducing par for T, rho, tcx (mW/m-K)
0.630d0            !gnu (universal exponent)
1.239d0            !gamma (universal exponent)
1.03d0             !R0 (universal amplitude)
0.063d0            !z (universal exponent--not used for t.c., only viscosity)
1.00d0             !c (constant in viscosity eqn = 1/[2 - (alpha + gamma)/(2*nu)], but often set to 1)
0.194d-9           !xi0 (amplitude) [m]
0.0496             !gam0 (amplitude) [-]
 0.5d-09           !qd_inverse (modified effective cutoff parameter) [m] generic number, not fit to data
 597.105d+00       !tref (reference temperature)=1.5*Tc [K]


#STN        !surface tension specification
ST1  surface tension model of Schmidt et al. (1996).
?LITERATURE REFERENCE \
?Schmidt, J.W., Carrillo-Nava, E., and Moldover, M.R.,
? "Partially halogenated hydrocarbons CHFCl-CF3, CF3-CH3, CF3-CHF-CHF2,
? CF3-CH2-CF3, CHF2-CF2-CH2F, CF3-CH2-CHF2, CF3-O-CHF2: Critical temperature,
? refractive indices, surface tension and estimates of liquid, vapor and
? critical densities,"
? Fluid Phase Equilibria, 122:187-206, 1996.
?\
!end of info section
179.52             !lower temperature limit [K]
398.07             !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
3                           !number of terms in surface tension model
398.07                      !critical temperature used in fit (dummy)
 0.047444    1.26           !sigma0 and n
 0.060396    1.76           != sigma0 * sigma1
-0.080655    2.26           != sigma0 * sigma2


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