📄 ammonia.fld
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ammonia !short name
7664-41-7 !CAS number
ammonia !full name
NH3 !chemical formula
R-717 !synonym
17.03026 !molecular weight [g/mol]
195.495 !triple point temperature [K]
239.823 !normal boiling point [K]
405.40 !critical temperature [K]
11333.0 !critical pressure [kPa]
13.2118 !critical density [mol/L] (225 kg/m**3)
0.25601 !acentric factor
1.470 !dipole moment [Debye]; value from REFPROP v5.0
OTH !default reference state
300.0 1.0 28945.714499977374 159.3366633735422 !tref, Pref, Href, Sref (corresponds to u,s = 0 @ Ttp)
6.1 !version number
! compiled by M. McLinden, NIST Physical and Chemical Properties Division, Boulder, Colorado
! 03-06-96 MM, original version
! 05-13-96 MM, add phi0 model of T-R for ideal-gas properties
! 06-17-96 MM, transform T-R phi0 model into Cp0 form
! 08-27-96 MM, add surface tension fit
! 10-09-96 MM, add TC4 and VS4 models; (info compiled by S.A. Klein)
! 01-31-97 MM, change pointer for ECS reference viscosity from VS3 to VS1
! modify ncoeff line for FEQ to accommodate critical region terms
! recast viscosity model of Fenghour into new VS1 form
! 02-06-97 MM, recast thermal cond model of Tufeu into new TC1 form
! 02-20-97 MM, add default reference state
! 02-26-97 MM, add pointer to t.c. critical enhancement model (NH3)
! 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
! 03-25-97 MM, set Psi,Chi coeff in ECS-transport to 1,0 pending refit of data
! 05-14-97 MM, change power of T in collision integral to integer
! 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.
! 10-27-97 MM, enter thermal conductivity shape factor fitted to data
! 01-14-98 MM, correct error in synonyms
! 03-24-98 EWL, set max density to triple-point density (until melting line implemented)
! 11-13-98 EWL, update format to version 6.1
! 11-13-98 EWL, change Tlow to 195.495, consistent with Ttrp
! 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
! 01-25-00 EWL, change the limits of the transport equations to avoid jumps
! between the primary equations and the ECS routines, except for
! TC1 since the equation goes negative above 1000 K.
! 3-20-00 EWL, change max density to the density at p=2*pmax along melting line
! 3-20-00 EWL, add Ahredndts and Baehr EOS
! 5-28-02 DGF, increase number of digits in Dc and Cp0 coefficients
! 5-28-02 EWL, increase number of digits in Href and Sref
#EOS !equation of state specification
FEQ Helmholtz equation of state for ammonia of Tillner-Roth et al. (1993).
?LITERATURE REFERENCE \
?Tillner-Roth, R., Harms-Watzenberg, F., and Baehr, H.D.,
? "Eine neue Fundamentalgleichung fuer Ammoniak,"
? DKV-Tagungsbericht, 20:167-181, 1993.
?\
?see also:
?Baehr, H.D. and Tillner-Roth, R.
?Thermodynamic Properties of Environmentally Acceptable Refrigerants;
?Equations of State and Tables for Ammonia, R22, R134a, R152a, and R123,
?Springer-Verlag, Berlin, 1994.\
?\
?The uncertainties of the equation of state are 0.2% in density, 2% in heat
?capacity, and 2% in the speed of sound, except in the critical region.
?The uncertainty in vapor pressure is 0.2%.
?\
!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]
CPP !pointer to Cp0 model
17.03026 !molecular weight [g/mol]
195.495 !triple point temperature [K]
6.09 !pressure at triple point [kPa]
43.035 !density at triple point [mol/L]
239.823 !normal boiling point temperature [K]
0.25601 !acentric factor
405.40 11333.0 13.2117771543124 !Tc [K], pc [kPa], rhoc [mol/L]
405.40 13.2117771543124 !reducing parameters [K, mol/L]
8.314471 !gas constant [J/mol-K]
21 4 0 0 0 0 !# terms, # coeff/term for: "normal" terms, critical, spare
-0.1858814d+01 1.500 1.00 0 !a(i),t(i),d(i),l(i)
0.4554431d-01 -0.500 2.00 0
0.7238548d+00 0.500 1.00 0
0.1229470d-01 1.000 4.00 0
0.2141882d-10 3.000 15.00 0
-0.1430020d-01 0.000 3.00 1
0.3441324d+00 3.000 3.00 1
-0.2873571d+00 4.000 1.00 1
0.2352589d-04 4.000 8.00 1
-0.3497111d-01 5.000 2.00 1
0.1831117d-02 5.000 8.00 2
0.2397852d-01 3.000 1.00 2
-0.4085375d-01 6.000 1.00 2
0.2379275d+00 8.000 2.00 2
-0.3548972d-01 8.000 3.00 2
-0.1823729d+00 10.000 2.00 2
0.2281556d-01 10.000 4.00 2
-0.6663444d-02 5.000 3.00 3
-0.8847486d-02 7.500 1.00 3
0.2272635d-02 15.000 2.00 3
-0.5588655d-03 30.000 4.00 3
#AUX !auxiliary model specification
CPP ideal gas heat capacity function
?LITERATURE REFERENCE \
?Tillner-Roth, R., Harms-Watzenberg, F., and Baehr, H.D.,
? "Eine neue Fundamentalgleichung fuer Ammoniak,"
? DKV-Tagungsbericht, 20:167-181, 1993.
?\
?Note: Tillner-Roth et al. give a Helmholtz form for the ideal gas term; it
? has been converted to a Cp0 form by the transform:
?\
? Cp0/R = (2/9)*a3*Tr**(-1/3) - (15/4)*a4*Tr**(3/2) - (77/16)*a5*Tr**(7/4) \
? where the ai are the original coefficients given by T-R and Tr = T/Tc \
?\
!end of info section
195.495 !lower temperature limit [K]
700.0 !upper temperature limit [K]
0.0 !upper pressure limit [kPa]
0.0 !maximum density [mol/L]
405.40 8.314471 !reducing parameters for T, Cp0
3 0 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh
2.54985265683d0 -0.333333333333 !c(i), power of T
4.86079045595d0 1.50
-2.74637680305d0 1.75
#AUX !auxiliary model specification
PH0 Helmholtz form for the ideal-gas state
?LITERATURE REFERENCE \
?Tillner-Roth, R., Harms-Watzenberg, F., and Baehr, H.D.,
? "Eine neue Fundamentalgleichung fuer Ammoniak,"
? DKV-Tagungsbericht, 20:167-181, 1993.
?\
!end of info section
195.495 !lower temperature limit [K]
700.0 !upper temperature limit [K]
0.0 !upper pressure limit [kPa]
0.0 !maximum density [mol/L]
1 5 0 !Nterms: ai*log(tau**ti); ai*tau**ti; ai*log(1-exp(bi*tau))
-1.000000d+0 1.00d0 !ai, ti for [ai*log(tau**ti)] terms
-1.581502d+1 0.00d0 !aj, ti for [ai*tau**ti] terms
4.255726d+0 1.00d0
1.147434d+1 0.333333333333d0
-1.296211d+0 -1.50d0
5.706757d-1 -1.75d0
@EOS !equation of state specification
FE1 Helmholtz equation of state for ammonia of Ahrendts and Baehr (1979).
?LITERATURE REFERENCE \
?Ahrendts, J. and Baehr, H.D.
? "The Thermodynamic Properties of Ammonia,"
? VDI-Forsch., Number 596, 1979.
?\
!end of info section
195.486 !lower temperature limit [K]
600.0 !upper temperature limit [K]
400000.0 !upper pressure limit [kPa]
44.0 !maximum density [mol/L]
CP1 !pointer to Cp0 model
17.03026 !molecular weight [g/mol]
195.486 !triple point temperature [K]
6.0339 !pressure at triple point [kPa]
43.137 !density at triple point [mol/L]
239.81 !normal boiling point temperature [K]
0.25601 !acentric factor
405.4 11333.0 13.212 !Tc [K], pc [kPa], rhoc [mol/L]
405.4 13.212 !reducing parameters [K, mol/L]
8.31434 !gas constant [J/mol-K]
36 5 0 0 0 0 !# terms, # coeff/term for: "normal" terms, critical, spare
0.911447599671E+00 1.0 1.0 0 0.0 !a(i),t(i),d(i),l(i)
-0.382129415537E+01 2.0 1.0 0 0.0
0.147730246416E+01 3.0 1.0 0 0.0
0.580205129871E-01 6.0 1.0 0 0.0
-0.574413226616E-03 9.0 1.0 0 0.0
0.153018094697E+00 0.0 2.0 0 0.0
-0.256626062036E+00 4.0 2.0 0 0.0
0.445448838055E+00 2.0 3.0 0 0.0
-0.153321054500E+00 1.0 4.0 0 0.0
0.527996725202E-01 1.0 5.0 0 0.0
-0.484726581121E-01 2.0 5.0 0 0.0
0.246579503330E-02 3.0 7.0 0 0.0
-0.107999941003E-03 3.0 9.0 0 0.0
-0.215298673010E-04 5.0 9.0 0 0.0
-0.306938893790E-04 1.0 10.0 0 0.0
0.839163613582E-05 1.0 11.0 0 0.0
0.814833533876E-06 5.0 12.0 0 0.0
-0.314753664228E-07 5.0 14.0 0 0.0
0.642978802435E+00 2.0 1.0 2 0.86065403
-0.139510669941E+01 5.0 1.0 2 0.86065403
0.956135683432E+00 6.0 1.0 2 0.86065403
-0.272787386366E+00 7.0 1.0 2 0.86065403
-0.189305337334E+01 5.0 2.0 2 0.86065403
0.479043603913E+01 6.0 2.0 2 0.86065403
-0.245945016980E+01 7.0 2.0 2 0.86065403
-0.121107723958E+01 3.0 3.0 2 0.86065403
0.500552271170E+01 4.0 3.0 2 0.86065403
-0.615476024667E+01 5.0 3.0 2 0.86065403
0.210772481535E+01 6.0 3.0 2 0.86065403
0.298003513465E+00 6.0 4.0 2 0.86065403
-0.152506723279E+00 7.0 4.0 2 0.86065403
0.115565883925E-02 1.0 0.0 2 506.2670781840292
-0.911244657201E-03 2.0 0.0 2 506.2670781840292
0.100587210000E-01 0.0 0.0 2 50626.70781840292
-0.120983155888E-01 1.0 0.0 2 50626.70781840292
0.382694351151E-02 2.0 0.0 2 50626.70781840292
#AUX !auxiliary model specification
CP1 ideal gas heat capacity function
?LITERATURE REFERENCE \
?Ahrendts, J. and Baehr, H.D.
? "The Thermodynamic Properties of Ammonia,"
? VDI-Forsch., Number 596, 1979.
?\
!end of info section
195.486 !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
6 0 0 0 0 0 0 !Nterms: polynomial, exponential, cosh, sinh
0.51118140E+01 0.00
-0.42966650E+02 -1.00
-0.10243792E-01 1.00
0.38750775E-04 2.00
-0.46406097E-07 3.00
0.20268561E-10 4.00
@EOS !equation of state specification
FES short Helmholtz equation of state for ammonia 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
195.495 !lower temperature limit [K]
600.0 !upper temperature limit [K]
100000.0 !upper pressure limit [kPa]
52.915 !maximum density [mol/L]
CPP !pointer to Cp0 model
17.031 !molecular weight [g/mol]
195.495 !triple point temperature [K]
6.0531 !pressure at triple point [kPa]
43.158 !density at triple point [mol/L]
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