ammonia.fld

一个关于物性计算的软件

239.81                                 !normal boiling point temperature [K]
0.256                                  !acentric factor
405.4        11339.3      13.211203    !Tc [K], pc [kPa], rhoc [mol/L]
405.4                     13.211203    !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
 0.730227200000E+00  0.25    1.0     0 !a(i),t(i),d(i),l(i)
-0.118791160000E+01  1.25    1.0     0
-0.683191360000E+00  1.5     1.0     0
 0.400286830000E-01  0.25    3.0     0
 0.908012150000E-04  0.875   7.0     0
-0.562161750000E-01  2.375   1.0     1
 0.449356010000E+00  2.0     2.0     1
 0.298971210000E-01  2.125   5.0     1
-0.181816840000E+00  3.5     1.0     2
-0.984166600000E-01  6.5     1.0     2
-0.550837440000E-01  4.75    4.0     2
-0.889832190000E-02 12.5     2.0     3


#TCX               !thermal conductivity model specification
TC1  pure fluid thermal conductivity model of Tufeu et al. (1984).
?LITERATURE REFERENCE \
?Tufeu, R., Ivanov, D.Y., Garrabos, Y., and Le Neindre, B.,
? "Thermal conductivity of ammonia in a large temperature and pressure range
? including the critical region,"
? Ber. Bunsenges. Phys. Chem., 88:422-427, 1984.
?\
?A patch has been added to the Tufeu formulation to avoid infinite values
? of the thermal conductivity around the critical temperature at ANY density.
? The patch affects the region between 404.4 and 406.5 K and rho<9.6 or
? rho>18 mol/l.
?\
?The uncertainty in thermal conductivity is 2%.
?\
!end of info section
195.495            !lower temperature limit [K]
580.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
52.915             !maximum density [mol/L]
5   0              !# terms for dilute gas function:  numerator, denominator
1.0     1.0        !reducing parameters for T, tcx
 0.3589d-01    0.00d0   !coeff, power in T
-0.1750d-03    1.00d0
 0.4551d-06    2.00d0
 0.1685d-09    3.00d0
-0.4828d-12    4.00d0
4   0              !# terms for background gas function:  numerator, denominator
1.0     0.058719010     1.0               !reducing par for T, rho (=1/MW), tcx
 0.16207d-03   0.00d0   1.00d0   0.00d0   !coeff, powers of t, rho, spare for future use
 0.12038d-05   0.00d0   2.00d0   0.00d0
-0.23139d-08   0.00d0   3.00d0   0.00d0
 0.32749d-11   0.00d0   4.00d0   0.00d0
NH3                !pointer to critical enhancement auxiliary function


#ETA               !viscosity model specification
VS1  pure fluid viscosity model of Fenghour et al. (1995).
?LITERATURE REFERENCE \
?Fenghour, A., Wakeham, W.A., Vesovic, V., Watson, J.T.R., Millat, J., and
? Vogel, E.,
? "The viscosity of ammonia,"
? J. Phys. Chem. Ref. Data, 24:1649-1667, 1995.
?\
?The uncertainty varies from 0.5% for the viscosity of the dilute gas phase
?at moderate temperatures to about 5% for the viscosity at high pressures
?and temperatures.
?\
!end of info section
195.495            !lower temperature limit [K]
700.0              !upper temperature limit [K]
1000000.0          !upper pressure limit [kPa]
52.915             !maximum density [mol/L] (900 kg/m**3)
1                  !number of terms associated with dilute-gas function
CI1                !pointer to reduced effective collision cross-section model
0.2957             !Lennard-Jones coefficient sigma [nm]
386.0              !Lennard-Jones coefficient epsilon/kappa [K]
1.0    1.0         !reducing parameters for T, eta
8.8135503d0   0.50d0      !=0.021357*SQRT(MW)*(unknown factor of 100)  [Chapman-Enskog term]
13                        !number of terms for initial density dependence
386.0    0.015570557      !reducing parameters for T (= eps/k), etaB2 (= 0.6022137*sigma**3)
-0.17999496d+1   0.00d0   !coeff, power in T* = T/(eps/k)
 0.46692621d+2  -0.50d0
-0.53460794d+3  -1.00d0
 0.33604074d+4  -1.50d0
-0.13019164d+5  -2.00d0
 0.33414230d+5  -2.50d0
-0.58711743d+5  -3.00d0
 0.71426686d+5  -3.50d0
-0.59834012d+5  -4.00d0
 0.33652741d+5  -4.50d0
-0.12027350d+5  -5.00d0
 0.24348205d+4  -5.50d0
-0.20807957d+3  -6.00d0
0 7 0 0 0 0        !# resid terms:  close-packed density;  simple poly; numerator of rational poly; denominator of rat. poly; numerator of exponential; denominator of exponential
386.0   1.0    1.0                    !reducing parameters for T (= eps/k), rho, eta
 2.19664285d-1  -2.00  2.00  0.00  0  !d_22; powers of tau, del, del0; power of del in exponential [0 indicated no exponential term present]
-0.83651107d-1  -4.00  2.00  0.00  0  !d_24
 0.17366936d-2   0.00  3.00  0.00  0  !d_30
-0.64250359d-2  -1.00  3.00  0.00  0  !d_31
 1.67668649d-4  -2.00  4.00  0.00  0  !d_42
-1.49710093d-4  -3.00  4.00  0.00  0  !d_43
 0.77012274d-4  -4.00  4.00  0.00  0  !d_44
NUL                !pointer to critical enhancement auxiliary function (none used)


#AUX               !reduced effective collision cross-section model specification
CI1  reduced effective collision cross-section model (empirical form in terms of log(T*))
?LITERATURE REFERENCE \
?reduced effective collision cross-section as reported by:
?\
?Fenghour, A., Wakeham, W.A., Vesovic, V., Watson, J.T.R., Millat, J., and
? Vogel, E.,
? "The viscosity of ammonia,"
? J. Phys. Chem. Ref. Data, 24:1649-1667, 1995.
?\
!end of info section
195.495            !lower temperature limit [K]
700.0              !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
4                  !number of terms
 4.99318220d+0  0  !coeff, power of Tstar
-0.61122364d+0  1
 0.18535124d+0  3
-0.11160946d+0  4


@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:
?\
?Clifford, A.A. and Tufeu, R.,
? "Thermal conductivity of gaseous and liquid ammonia,"
? Journal of Heat Transfer, 110:992-995, 1988.
?\
?Golubev, I.F. and Sokolova, V.P.,
? "The thermal conductivity of ammonia at various temperatures and pressures,"
? Thermal Engineering, 11:78-82, 1964.
?\
?Needham, D.P. and Ziebland, H.
? "The thermal conductivity of liquid and gaseous ammonia and its anomalous
? behaviour in the vicinity of the critical point,"
? International Journal of Heat and Mass Transfer, 8:1387-1414, 1965.
?\
?Richter, G.N. and Sage, B.H.,
? "Thermal conductivity of fluids:  Ammonia,"
? J. Chem. Eng. Data, 9:75-78, 1964.
?\
?Tufeu, R., Ivanov, D.Y., Garrabos, Y., and Le Neindre, B.,
? "Thermal conductivity of ammonia in a large temperature and pressure range
? including the critical region,"
? Ber. Bunsenges. Phys. Chem., 88:422-427, 1984.
?\
?von Franck, E.U.,
? "Zur Temperaturabhangigkeit der Warmeeleitfahigkeit einiger Gase,"
? Z. Electrochemie, 55:636-643, 1951.
?\
?Average absolute deviations of the fit from the experimental data were:
?\
?  Clifford:  3.16%; Golubev:  4.52%; Needham:  4.25%; Richter:  4.81%;
?  Tufeu:  5.19%; von Franck:  1.85%; Overall:  4.50%
?\
?the Lennard-Jones parameters are taken from:
?\
?Fenghour, A., Wakeham, W.A., Vesovic, V., Watson, J.T.R., Millat, J., and
? Vogel, E.,
? "The viscosity of ammonia,"
? J. Phys. Chem. Ref. Data, 24:1649-1667, 1995.
?\
!end of info section
195.495            !lower temperature limit [K]
550.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
52.915             !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)
0.2957             !Lennard-Jones coefficient sigma [nm] for ECS method
386.0              !Lennard-Jones coefficient epsilon/kappa [K] for ECS method
2  0  0                       !number of terms in f_int term in Eucken correlation, spare1, spare2
-1.2172d-4   0.0   0.0   0.0  !coeff, power of T, spare 1, spare 2 fitted rho/rho_c = 0 - 0.01
 1.2818d-6   1.0   0.0   0.0
1  0  0                       !number of terms in psi (visc shape factor): poly,spare1,spare2
 1.0000d+0   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
3  0  0                       !number of terms in chi (t.c. shape factor): poly,spare1,spare2
 1.4312d+0   0.0   0.0   0.0  !coeff, power of Tr, power of Dr, spare
-2.3264d-1   0.0   1.0   0.0
 3.2521d-2   0.0   2.0   0.0


#STN        !surface tension specification
ST1  surface tension model; fit of data from Durrant (1934), Laine (1952), and Stairs (1956).
?LITERATURE REFERENCE \
?fit of the data of:
?\
?Durrant, A.A., Pearson, T.G., and Robinson, P.L.,
? "Physical relationships amongst the hydrides of elements of the fifth group
? with special reference to association in these compounds,"
? Journal of the Chemical Society (part 1), pp. 730-735, 1934.
?\
?Laine, P.,
? "Kaeltemaschinen und -apparate:  Pruefung von Kaeltemaschineteilen
? auf Dichtheit"
? Kaeltetechnik, 6:173, 1953. (Abstract of paper no. 129, section 55,
? presented at the 4th Congress Intern. Chauff. Industr., Paris,
? September-October, 1952).
?\
?Stairs, R.A. and Sienko, M.J.,
? "Surface tension of ammonia and of solutions of alkalai halides in ammonia,"
? J. Am. Chem. Soc., 78:920-923, 1956.
?\
!end of info section
195.495            !lower temperature limit [K]
405.40             !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
2                           !number of terms in surface tension model
405.5                       !critical temperature used in fit (dummy)
 0.12190     1.26           !sigma0 and n
 0.04015     2.26


#MLT        !melting line specification
ML1  melting line model of Haar and Gallagher (1978).
?LITERATURE REFERENCE \
?Haar, L. and Gallagher, J.S.,
? "Thermodynamic Properties of Ammonia,"
? J. Phys. Chem. Ref. Data, 7(3):635-792, 1978.
?\
!end of info section
195.495            !lower temperature limit [K]
700.0              !upper temperature limit [K]
0.0                !(dummy) upper pressure limit
0.0                !(dummy) maximum density
195.49453 1000.     !reducing temperature and pressure
0 0 1 0 0 0                 !number of terms in melting line equation
0.2533125d4  1.             !coefficients and exponents


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