R12                !short name (same as file name)
75-71-8            !CAS number
dichlorodifluoromethane
CFC-12             !synonym1
R-12               !synonym2
120.913            !molecular weight [g/mol]
116.099            !triple pt temperature [K]
243.398            !normal boiling pt [K]
385.12             !critical temperature [K]
4136.1             !critical pressure [kPa]
4.672781           !critical density [mol/L]  (= 565 kg/m**3)
0.17948            !acentric factor
0.510              !dipole moment [Debye]--value from REFPROP 5
IIR                !default reference state
6.001              !version number

! compiled by M. McLinden, NIST Thermophysics Division, Boulder, Colorado
! 02-29-96  MM, original version
! 03-17-96  MM, add transport correlations compiled by S.A. Klein
! 06-17-96  MM, add thermal conductivity coefficients fitted by S.A. Klein
! 08-19-96  MM, add surface tension fit
! 10-09-96  MM, add dipole moment value
!               add Cp0 function of Marx et al.
! 01-31-97  MM, change pointer for ECS reference viscosity from VS3 to VS1
!               modify ncoeff line for FEQ to accomodate critical region terms
! 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
! 06-01-97 EWL, add parameters for ECS viscosity correlation
! 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
! 11-04-97  MM, enter thermal conductivity shape factor fitted to data

#EOS               !equation of state specification
FEQ  fundamental (Helmholtz) equation of state; Marx, Pruss, and Wagner (1992).
?LITERATURE REFERENCE \
?Marx, V., Pruss, A. and Wagner, W. (1992). Neue Zustandsgleichungen fuer R 12,
? R 22, R 11 und R 113.  Beschreibung des thermodynamishchen Zustandsverhaltens
? bei Temperaturen bis 525 K und Druecken bis 200 MPa. Duesseldorf: VDI Verlag,
? Series 19 (Waermetechnik/Kaeltetechnik), No. 57. \
?
!end info
116.099            !lower temperature limit [K]
525.00             !upper temperature limit [K]
200000.0           !upper pressure limit [kPa]
15.13              !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
120.913                                !molecular weight [g/mol]
116.099                                !triple point temperature [K]
0.25d-3                                !pressure at triple point [kPa]
15.1253d0                              !density at triple point [mol/L]
243.398                                !normal boiling point temp [K]
  0.17948                              !acentric factor
385.12d0   4136.1d0   4.672781d0       !Tc [K] ,pc [kPa], rho [mol/L]
385.12d0              4.672781d0       !reducing parameters [K, mol/L]
8.314471d0                             !gas constant [J/mol-K]
      22  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
  0.2075343402d+1   0.500   1.00   0   !a(i),t(i),d(i),l(i)
 -0.2962525996d+1   1.000   1.00   0
  0.1001589616d-1   2.000   1.00   0
  0.1781347612d-1   2.500   2.00   0
  0.2556929157d-1  -0.500   4.00   0
  0.2352142637d-2   0.000   6.00   0
 -0.8495553314d-4   0.000   8.00   0
 -0.1535945599d-1  -0.500   1.00   1
 -0.2108816776d+0   1.500   1.00   1
 -0.1654228806d-1   2.500   5.00   1
 -0.1181316130d-1  -0.500   7.00   1
 -0.4160295830d-4   0.000  12.00   1
  0.2784861664d-4   0.500  12.00   1
  0.1618686433d-5  -0.500  14.00   1
 -0.1064614686d+0   4.000   1.00   2
  0.9369665207d-3   4.000   9.00   2
  0.2590095447d-1   2.000   1.00   3
 -0.4347025025d-1   4.000   1.00   3
  0.1012308449d+0  12.000   3.00   3
 -0.1100003438d+0  14.000   3.00   3
 -0.3361012009d-2   0.000   5.00   3
  0.3789190008d-3  14.000   9.00   4


#AUX        !auxiliary model specification
CPP  ideal gas heat capacity function of Marx et al.
?LITERATURE REFERENCE \
?Marx, V., Pruss, A. and Wagner, W. (1992). Neue Zustandsgleichungen fuer R 12,
? R 22, R 11 und R 113.  Beschreibung des thermodynamishchen Zustandsverhaltens
? bei Temperaturen bis 525 K und Druecken bis 200 MPa. Duesseldorf: VDI Verlag,
? Series 19 (Waermetechnik/Kaeltetechnik), No. 57. \
? \
?Note:  Marx 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 + a_3) + SUM{a_i*U_i*exp(U_i)/[1 - exp(U_i)]**2}\
?   where U_i = omega_i*T_n/T, T_n = Tcrit, \
?   and the a_i and omega_i are the original coefficients given by Marx\
?
!end info
100.0              !lower temperature limit [K]
525.0              !upper temperature limit [K]
0.00               !upper pressure limit [kPa]
0.00               !maximum density [mol/L]
1.000     8.31451                     !reducing parameters for T, Cp0
1   4                                 !Nterms:  polynonial, exponential
4.00361975d0      0.00                != 1 + a_3; power in T
3.16062357d0      1.4334342d3         != omega_4 * T_n  (T_n = 385.12 K)
0.371258136d0     2.4300498d3         != omega_5 * T_n
3.56226039d0      6.8565952d2         != omega_6 * T_n
2.12152336d0      4.1241579d2         != omega_7 * T_n


#TRN               !transport model specification
ECS  Extended Corresponding States model for transport props (R134a reference).
?LITERATURE REFERENCES FOR THE ECS MODEL \
?Klein, S.A., McLinden, M.O. and Laesecke, A. (1997). An improved extended
? corresponding states method for estimation of viscosity of pure refrigerants
? and mixtures. Int. J. Refrigeration  20: 208-217. \
?\
?Huber, M.L., Friend, D.G. and Ely, J.F. Prediction of the thermal
? conductivity of refrigerants and refrigerant mixtures.
? Fluid Phase Equilibria  80: 249-261 (1992). \
?\
?DATA SOURCES FOR THERMAL CONDUCTIVITY\
?The ECS parameters for thermal conductivity were based on the data of:\
?\
?Donaldson, A.B. (1975). On the estimation of thermal conductivity of organic
? vapors. Ind. Eng. Chem.  14: 325-328.\
?\
?Geller, V.Z., Artamonov, S.D., Zaporozhan, G.V. and Peredrii, V.G. (1974).
? Thermal conductivity of Freon-12. J. Eng. Phys.  27: 842-846.\
?\
?Keyes, F.G. (1954). Thermal conductivity of gases. Trans. ASME  76: 809-816.\
?\
?Makita, T., Tanaka, Y., Morimoto, Y., Noguchi, M. and Kubota, H. (1981).
? Thermal conductivity of gaseous fluorocarbon refrigerants R12, R13, R22,
? and R23 under pressure. Int. J. Thermophysics  2: 249_268.\
?\
?Shankland, I.R. (1990). Transport properties of CFC alternatives. paper
? presented at AIChE Spring National Meeting, Orlando, Florida\
?\
?Sherratt, G.G. and Griffiths, E. (1939). A hot wire method for the thermal
? conductivity of gases. Phil. Mag.  27: 68-75.\
?\
?Venart, J.E.S. and Mani, N. (1975). The thermal conductivity of R12. Trans.
? Canadian Soc. Mech. Engrs.  3: 1-9.\
?\
?Yata, J., Minamiyama, T. and Tanaka, S. (1984). Measurement of thermal 
?conductivity of liquid fluorocarbons. Int. J. Thermophysics  5: 209-218.\
?\
?Average absolute deviations of the fit from the experimental data were:\
?  Donaldson:  2.18%; Geller:  1.86%; Keyes:  1.36%; Makita:  0.73%;
?  Shankland:  1.70%; Sherratt: 1.55%; Venart:  1.29%; Yata:  2.32%;
?  Overall:  1.36%\
?\
?DATA SOURCES FOR VISCOSITY\
?The ECS parameters for viscosity were based on the data of:\
?\
?Assael, M.J., Polimatidou, S.K., Vogel, E. and Wakeham, W.A. (1994).
? Measurements of the viscosity of R11, R12, R141b, and R152a in the
? temperature range 270-340 K at pressures up to 20 MPa.
? International Journal of Thermophysics, 15(4): 575-589.\
?\
?Kumagai, A. and Takahashi, S. (1991).
? Viscosity of saturated liquid fluorocarbon refrigerants from 273 to 353 K.
? International Journal of Thermophysics, 12(1): 105-117.\
?\
?Average absolute deviations of the fit from the experimental data were:\
?   Assael:  0.64%; Kumagai:  2.45%; Overall:  1.00%\
?\
?Lennard-Jones parameters are estimated.\
?\
!end of info section
116.099            !lower temperature limit [K]
525.00             !upper temperature limit [K]
200000.0           !upper pressure limit [kPa]
15.13              !maximum density [mol/L]
FEQ R134a.fld
VS1                !model for reference fluid viscosity
TC1                !model for reference fluid thermal conductivity
0                  !Lennard-Jones flag (0 or 1) (0 => use estimates)
0.00000            !Lennard-Jones coefficient Sigma [nm]
000.00             !L-J coefficient epsilon/kB [K]
1  0  0            !number of terms in f_int term in Eucken correlation, spare1, spare 2
 1.3440d-3   0.0   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
 1.0524907   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
-0.0252897   0.0   1.0   0.0
2  0  0            !number of terms in chi (t.c. shape factor):  poly,spare1,spare2
 9.9103d-1   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
 2.9509d-3   0.0   1.0   0.0


=0.991030995236888 + 0.00295090450372326*C6

#STN        !surface tension specification
ST1  surface tension model
?LITERATURE REFERENCE \
?Okada, M. and Watanabe, K. (1988). Surface tension correlations for several
? fluorocarbon refrigerants. Heat Transfer-Japanese Research  17: 35-52.\
?
!end info
116.099            !lower temperature limit [K]
385.12             !upper temperature limit [K]
0.00               !(dummy) upper pressure limit
0.00               !(dummy) maximum density
1                  !number of terms
385.01d0               !critical temperature used by Okada & Watanabe (dummy)
0.05652d0  1.27d0      !sigma0 and n


@END
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