ethane.fld

一个关于物性计算的软件

ethane             !short name
74-84-0            !CAS number
ethane             !full name
CH3CH3             !chemical formula
R-170              !synonym
30.070             !molecular weight [g/mol]
90.352             !triple point temperature [K]
184.552            !normal boiling point [K]
305.33             !critical temperature [K]
4871.8             !critical pressure [kPa]
6.87               !critical density [mol/L]
0.0993             !acentric factor
0.0                !dipole moment [Debye]
NBP                !default reference state
6.1                !version number

! compiled by M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 03-28-96  MM, original version
! 07-08-96  MM, replace temporary Cp0 with function of Younglove and Ely
! 10-03-96  MM, add surface tension fit
! 10-18-96  MM, missing constant in dilute-gas viscosity model
! 10-28-96  MM, add EOS of Friend et al
! 01-31-97  MM, change pointer for ECS reference viscosity from VS3 to VS1
!               modify ncoeff line for FEQ to accommodate critical region terms
! 02-20-97  MM, add default reference state
! 02-21-97  MM, put viscosity model into revised VS2 format
! 02-26-97  MM, add version number and pointer to visc critical enhancement (both future use)
! 03-11-97  MM, modify ECS-transport to new format
! 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
! 03-24-98 EWL, set max density to rho @ T.P. (until melting line implemented)
! 06-24-97 EWL, correct the coefficients of the BWR
! 11-13-98 EWL, update format to version 6.1
! 11-13-98 EWL, coefficient EV(8) in VS2 set to rhoc of BWR, not of FEQ
! 11-18-98 EWL, correct the critical pressure in the Younglove section to 4.87143
! 10-14-99 EWL, add L-J parameters
! 11-01-99 EWL, add Span 12 term short equation of state
! 11-10-99 EWL, add extra digits to melting equation to get ptp at ttp
! 11-19-99 EWL, add transport equations of Friend
! 11-22-99 EWL, change ECS reference fluid to nitrogen
!  3-20-00 EWL, change max density to the density at p=2*pmax along melting line


#EOS               !equation of state specification
FEQ  Helmholtz equation of state for ethane of Friend et al. (1991).
?LITERATURE REFERENCE \
?Friend, D.G., Ingham, H., and Ely, J.F.,
? "Thermophysical properties of ethane,"
? J. Phys. Chem. Ref. Data, 20(2):275-347, 1991.
?\
?The uncertainties of the equation of state are 0.2% in density, 2.5% in
?isobaric heat capacity above 150 K, and 1.5% in isochoric heat capacity above
?150 K.  The uncertainty in speed of sound ranges from 0.6% in the liquid and
?vapor below the critical temperature to less than 2% elsewhere, except in the
?critical region.
?\
!end of info section
90.352             !lower temperature limit [K]
625.0              !upper temperature limit [K]
70000.             !upper pressure limit [kPa]
22.419             !maximum density [mol/L]
CPP                                    !pointer to Cp0 model
30.070                                 !molecular weight [g/mol]
90.352                                 !triple point temperature [K]
1.130d-3                               !pressure at triple point [kPa]
21.665                                 !density at triple point [mol/L]
184.552                                !normal boiling point temperature [K]
0.0993                                 !acentric factor
305.33       4871.8       6.87         !Tc [K], pc [kPa], rhoc [mol/L]
305.33                    6.87         !reducing parameters [K, mol/L]
8.31451                                !gas constant [J/mol-K]
      32  4      0  0       0  0       !# terms, # coeff/term for:  "normal" terms, critical, spare
 0.46215430560d+00     0.0    1.0   0  !a(i),t(i),d(i),l(i)
-0.19236936387d+01     1.5    1.0   0
 0.39878604003d+00     2.5    1.0   0
 0.16054532372d-01    -0.5    2.0   0
 0.12895242219d+00     1.5    2.0   0
 0.35458320491d-01     2.0    2.0   0
 0.34927844540d-01     0.0    3.0   0
-0.11306183380d-01     1.0    3.0   0
-0.39809032779d-01     2.5    3.0   0
 0.83031936834d-03     0.0    6.0   0
 0.45921575183d-03     2.0    7.0   0
 0.17530287917d-06     5.0    7.0   0
-0.70919516126d-04     2.0    8.0   0
-0.23436162249d+00     5.0    1.0   2
 0.84574697645d-01     6.0    1.0   2
 0.14861052010d+00     3.5    2.0   2
-0.10016857867d+00     5.5    2.0   2
-0.59264824388d-01     3.0    3.0   2
-0.41263514217d-01     7.0    3.0   2
 0.21855161869d-01     6.0    5.0   2
-0.74552720958d-04     8.5    6.0   2
-0.98859085572d-02     4.0    7.0   2
 0.10208416499d-02     6.5    8.0   2
-0.52189655847d-03     5.5   10.0   2
 0.98592162030d-04    22.0    2.0   4
 0.46865140856d-01    11.0    3.0   4
-0.19558011646d-01    18.0    3.0   4
-0.46557161651d-01    11.0    4.0   4
 0.32877905376d-02    23.0    4.0   4
 0.13572090185d+00    17.0    5.0   4
-0.10846471455d+00    18.0    5.0   4
-0.67502836903d-02    23.0    5.0   4


#AUX               !auxiliary model specification
CPP  ideal gas heat capacity function of Friend et al.
?LITERATURE REFERENCE \
?Friend, D.G., Ingham, H., and Ely, J.F.,
? "Thermophysical properties of ethane,"
? J. Phys. Chem. Ref. Data, 20(2):275-347, 1991.
?\
?Note:  Friend 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 + Q_2) - 4/9*Q_3*Tr**(1/3) - 10/9*Q_4*Tr**(2/3) \
?         - 2*Q_5*Tr + Q_6*U*U*exp(U)/[1 - exp(U)]**2\
?   where:  Tr = T/Tcrit, \
?           U = Q_7*Tcrit/T, \
?   and the Q_i are the original coefficients given by Friend.
?\
!end of info section
90.0               !lower temperature limit [K]
625.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
305.33       8.314510                  !reducing parameters for T, Cp0
  4  1    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 4.8159476d0     0.00d0                != 1 + Q_2; power in T
-3.8231688d0     0.33333333333333d0    != -4/9*Q_3
 3.6750817d0     0.66666666666667d0    != -10/9*Q_4
 1.1191336d0     1.00d0                != -2*Q_5
 5.0722267d0    -1.681601128d3         != -Q_6; Q_7*Tcrit


@EOS               !equation of state specification
FES  short Helmholtz equation of state for ethane 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
90.352             !lower temperature limit [K]
600.0              !upper temperature limit [K]
100000.0           !upper pressure limit [kPa]
22.419             !maximum density [mol/L]
CPS                                    !pointer to Cp0 model
30.07                                  !molecular weight [g/mol]
90.352                                 !triple point temperature [K]
0.0010902                              !pressure at triple point [kPa]
21.721                                 !density at triple point [mol/L]
184.53                                 !normal boiling point temperature [K]
0.099                                  !acentric factor
305.322      4872.0       6.8706352    !Tc [K], pc [kPa], rhoc [mol/L]
305.322                   6.8706352    !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
 0.976280680000E+00  0.25    1.0     0 !a(i),t(i),d(i),l(i)
-0.269052510000E+01  1.125   1.0     0
 0.734982220000E+00  1.5     1.0     0
-0.353662060000E-01  1.375   2.0     0
 0.846920310000E-01  0.25    3.0     0
 0.241545940000E-03  0.875   7.0     0
 0.239649540000E+00  0.625   2.0     1
-0.427800930000E-01  1.75    5.0     1
-0.223088320000E+00  3.625   1.0     2
-0.517999540000E-01  3.625   4.0     2
-0.271784260000E-01 14.5     3.0     3
 0.112463050000E-01 12.0     4.0     3


#AUX               !auxiliary model specification
CPS  ideal gas heat capacity function
?LITERATURE REFERENCE \
?Jaeschke, M. and Schley, P.
? "Ideal-Gas Thermodynamic Properties for Natural-Gas Applications,"
? Int. J. Thermophys., 16(6):1381-1392, 1995.
?\
!end of info section
90.352             !lower temperature limit [K]
600.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          8.31451                   !reducing parameters for T, Cp0
  1  0    2  2    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
    0.4002630E+01   0.0
    0.6168252E+05  -2.0  0.2232840E+03  -1.0  -2.0
   -0.6908801E+07  -2.0  0.1071290E+04  -1.0  -2.0
    0.1357501E+07  -2.0  0.5593140E+03  -1.0  -2.0
    0.1403866E+08  -2.0  0.1031380E+04  -1.0  -2.0


@EOS               !equation of state specification
BWR  MBWR equation of state for ethane of Younglove and Ely (1987).
?LITERATURE REFERENCE \
?Younglove, B.A. and Ely, J.F.,
? "Thermophysical properties of fluids. II. Methane, ethane, propane,
? isobutane and normal butane,"
? J. Phys. Chem. Ref. Data, 16:577-798, 1987.
?\
?N.B.  all temperatures on IPTS-68
?\
!end of info section
90.348             !lower temperature limit [K]
600.0              !upper temperature limit [K]
70000.0            !upper pressure limit [kPa]
21.68              !maximum density [mol/L]
CP1                                    !pointer to Cp0 model
30.070                                 !molecular weight [g/mol]
90.348                                 !triple point temperature [K]
1.1308d-3                              !pressure at triple point [kPa]
21.680                                 !density at triple point [mol/L]
184.548                                !normal boiling point temperature [K]
0.0993                                 !acentric factor
305.34       4871.43      6.875        !Tc [K], pc [kPa], rhoc [mol/L]
305.34                    6.875        !reducing parameters [K, mol/L]
6.875                                  !gamma
0.0831434                              !gas constant [L-bar/mol-K]
      32       1                       !Nterm, Ncoeff per term
 -0.3204748852d-02      0.6529792241d-00      -0.1669704591d+02
  0.1147983381d+04     -0.1854721998d+06       0.4994149431d-03
 -0.4858871291d-00      0.1225345776d+03       0.8622615988d+05
 -0.1081290283d-04      0.6279096996d-01      -0.1716912675d+02
 -0.1640779401d-03     -0.4356516111d-01      -0.1966649699d+02
  0.4026724698d-02     -0.6498241861d-04       0.5111594139d-01
 -0.1113010349d-02     -0.7157747547d+04      -0.1848571024d+08
 -0.2137365569d+04      0.6275079986d+08      -0.9974911056d+01
  0.1129115014d+04     -0.1026469558d-00      -0.5660525915d+04
 -0.4209846430d-03      0.2374523553d-00      -0.1289637823d-05
 -0.5423801068d-03      0.2239717230d-01


#AUX               !auxiliary model specification
CP1  ideal gas heat capacity function of Younglove and Ely
?LITERATURE REFERENCE \
?Younglove, B.A. and Ely, J.F.,
? "Thermophysical properties of fluids. II. Methane, ethane, propane,
? isobutane and normal butane,"
? J. Phys. Chem. Ref. Data, 16:577-798, 1987.
?\
!end of info section
90.348             !lower temperature limit [K]
600.0              !upper temperature limit [K]
0.0                !upper pressure limit [kPa]
0.0                !maximum density [mol/L]
1.0          8.31434                   !reducing parameters for T, Cp0
  7  1    0  0    0  0  0              !Nterms:  polynomial, exponential, cosh, sinh
 -6.9341406909d+5      -3.00d0
  3.1534834135d+4      -2.00d0
 -6.1033752870d+2      -1.00d0
  9.9507922459d+0       0.00d0
 -2.8657877948d-2       1.00d0
  9.0922897821d-5       2.00d0
 -5.2750109915d-8       3.00d0
 -1.4243593411d+1    3000.d0


#TCX               !thermal conductivity model specification
TC1  pure fluid thermal conductivity model of Friend et al. (1991).
?LITERATURE REFERENCE \
?Friend, D.G., Ingham, H., and Ely, J.F.,
? "Thermophysical properties of ethane,"
? J. Phys. Chem. Ref. Data, 20(2):275-347, 1991.
?\
?The uncertainty in thermal conductivity is 2%.