R142b              !short name (same as file name)
75-68-3            !CAS number
1-chloro-1,1-difluoroethane
HCFC-142b          !synonym1
R-142b             !synonym2
100.495            !molecular weight [g/mol]
142.               !triple pt temperature [K]
264.152            !normal boiling pt [K] (computed from ECS model)
410.25             !critical temperature [K]
4123.              !critical pressure [kPa]
4.32857            !critical density [mol/L] (435 kg/m**3)
0.24098            !acentric factor (computed from ECS model)
2.14               !dipole moment [debye]; value from REFPROP v5.0
IIR                !default reference state
6.001              !version number

! compiled by M. McLinden, NIST Thermophysics Division, Boulder, Colorado
! 05-23-96  MM, original version
! 06-17-96  MM, add ECS-transport coefficients fitted by S.A. Klein
! 09-23-96 EWL, replace T-only ECS model with one having both T- and rho-dependence
! 09-30-96  MM, change order of f,h coefficients
! 10-03-96  MM, add surface tension model
! 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
! 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
! 11-12-97  MM, enter thermal conductivity shape factor fitted to data


#EOS               !equation of state specification
ECS  extended corresponding states model w/ T- and rho-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).\
?\
?extended by the addition of density-dependent shape factors based on
? fit by E.W. Lemmon, NIST, 09-23-96\
?\
?the ideal-gas contribution is computed with a polynomial Cp0 fit based on:\
?Rodgers, A.S.  TRC Thermodynamic Tables--Non-Hydrocarbons, Texas A & M
? University, pp v-7350 and v-7351 (1989).\
?
!end info
142.               !lower temperature limit [K]
500.00             !upper temperature limit [K]
60000.0            !upper pressure limit [kPa]
14.2662            !maximum density [mol/L]
CPP                !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
0.237359           !acentric factor for R142b used in shape factor correlation
410.25             !critical temperature [K]
4123.              !critical pressure [kPa]
4.32857            !critical density [mol/L] (435 kg/m**3)
2                         !number of temperature coefficients for 'f' shape factor
  0.235937284E+00  0      !alpha1 of Huber & Ely
 -0.610375264E+00  1      !alpha2 of Huber & Ely (log(Tr) term)
1                         !number of density coefficients for 'f' shape factor
  0.506906688E-02  1      !rho coefficient and power in temperature
3                         !number of temperature coefficients for 'h' shape factor
  0.550570924E+00  0      !beta1 of Huber & Ely
  0.939968487E+00  1      !beta2 of Huber & Ely (log(Tr) term)
  0.100523792E+00  1
0                         !number of density coefficients for 'h' shape factor


#AUX        !auxiliary model specification
CPP  polynomial fit for ideal gas heat capacity; based on Rodgers (1989).
?LITERATURE REFERENCES \
?Rodgers, A.S.  TRC Thermodynamic Tables--Non-Hydrocarbons, Texas A & M
?University, pp v-7350 and v-7351 (1989).\
?
!end info
200.0              !lower temperature limit [K]
500.0              !upper temperature limit [K]
0.00               !upper pressure limit [kPa]
0.00               !maximum density [mol/L]
1.000     1.000                       !reducing parameters for T, Cp0
3   0                                 !Nterms:  polynonial, exponential
16.39145d0         0.00               !c(i), power of T
 0.2717191d0       1.00
-1.589334d-4       2.00


#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:\
?\
?Perkins, R.A., Laesecke, A. and Nieto de Castro, C.A. (1992). Polarized
? transient hot wire thermal conductivity measurements.
? Fluid Phase Equilibria  80: 275_286.\
?\
?Sousa, A.T., Fialho, P.S., Nieto de Castro, C.A., Tufeu, R. and LeNeindre, B.
? (1992). The thermal conductivity of 1-chloro-1,1-difluoroethane.
? Int. J. Thermophysics  : submitted.\
?\
?Tanaka, Y., Nakata, M. and Makita, T. (1991). Thermal conductivity of gaseous
? HFC-134a, HFC-143a, HCFC-141b, and HCFC-142b.
? Int. J. Thermophysics  12: 949_963.\
?\
?Yata, J., Hori, M., Kurahashi, T. and Minamiyama, T. (1991). Thermal
? conductivity of alternative fluorocarbons in liquid phase.
? Fluid Phase Equilibria (submitted).
?\
?Average absolute deviations of the fit from the experimental data were:\
?  Perkins:  0.89%; Sousa:  2.55%; Tanaka:  1.76%; Yata:  1.91%;
?  Overall:  2.08%\
?\
?Lennard-Jones parameters are estimated.\
?
!end of info section
144.               !lower temperature limit [K] (based on Ttp/Tc of ref fluid)
400.00             !upper temperature limit [K]
40000.0            !upper pressure limit [kPa]
28.20              !maximum density [mol/L] (sat liq density at 144 K)
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
 1.3200d-3   0.0   0.0   0.0  !coeff, power of T, spare 1, spare 2
0  0  0            !number of terms in psi (visc shape factor):  poly,spare1,spare2
4  0  0            !number of terms in chi (t.c. shape factor):  poly,spare1,spare2
 1.680815    0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
-0.839544    0.0   1.0   0.0
 0.321957    0.0   2.0   0.0
-0.039706    0.0   3.0   0.0


#STN        !surface tension specification
ST1  surface tension model
?LITERATURE REFERENCE \
?Okada, M. and Higashi, Y. (1995). Experimental surface tensions for
? HFC-32, HCFC-124, HFC-125, HCFC-141b, HCFC-142b, and HFC-152a.
? Int. J. Thermophysics  16(3): 791-800.\
?
!end info
142.               !lower temperature limit [K]
410.25             !upper temperature limit [K]
0.00               !(dummy) upper pressure limit
0.00               !(dummy) maximum density
1                      !number of terms
410.26d0               !critical temperature used by Okada & Higashi (dummy)
0.05514d0  1.214d0     !sigma0 and n


@END
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