ammonia !short name (same as file name) 7664-41-7 !CAS number ammonia R717 !synonym1 R-717 !synonym2 17.03026 !molecular weight [g/mol] 195.495 !triple pt temperature [K] 239.823 !normal boiling pt [K] 405.40 !critical temperature [K] 11333. !critical pressure [kPa] 13.2117771543124 !critical density [mol/L] (= 225 kg/m**3) 0.25601 !acentric factor 1.470 !dipole moment [Debye]--value from REFPROP 5.0 IIR !default reference state 6.001 !version number ! compiled by M. McLinden, NIST Thermophysics 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 accomodate 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 #EOS !equation of state specification FEQ fundamental (Helmholtz) equation of state; Tillner-Roth et al. (1993). ?LITERATURE REFERENCE \ ?Tillner-Roth, R., Harms-Watzenberg, F. and Baehr, H.D. (1993). ?Eine neue Fundamentalgleichung fuer Ammoniak. DKV-Tagungsbericht 20:167-181. \ ? \ !end info 195.49 !lower temperature limit [K] 700.00 !upper temperature limit [K] 1000000.0 !upper pressure limit [kPa] 52.85 !maximum density [mol/L] ( = 900 kg/m**3) CPP !pointer to ideal-gas model 17.03026 !molecular weight [g/mol] 195.495 !triple point temperature [K] 6.09d0 !pressure at triple point [kPa] 43.0354 !density at triple point [mol/L] 239.823 !normal boiling point temp [K] 0.25601 !acentric factor 405.40d0 11333.0d0 13.2117771543124d0 !Tc [K], pc [kPa], rho [mol/L] 405.40d0 13.2117771543124d0 !reducing parameters [K, mol/L] 8.314471d0 !gas constant [J/mol-K] 21 4 0 0 0 0 !# terms, # coeff/term for: "normal" terms, critical, spare -0.1858814d+01 1.500d0 1.00d0 0 !a(i),t(i),d(i),l(i) 0.4554431d-01 -0.500d0 2.00d0 0 0.7238548d+00 0.500d0 1.00d0 0 0.1229470d-01 1.000d0 4.00d0 0 0.2141882d-10 3.000d0 15.00d0 0 -0.1430020d-01 0.000d0 3.00d0 1 0.3441324d+00 3.000d0 3.00d0 1 -0.2873571d+00 4.000d0 1.00d0 1 0.2352589d-04 4.000d0 8.00d0 1 -0.3497111d-01 5.000d0 2.00d0 1 0.1831117d-02 5.000d0 8.00d0 2 0.2397852d-01 3.000d0 1.00d0 2 -0.4085375d-01 6.000d0 1.00d0 2 0.2379275d+00 8.000d0 2.00d0 2 -0.3548972d-01 8.000d0 3.00d0 2 -0.1823729d+00 10.000d0 2.00d0 2 0.2281556d-01 10.000d0 4.00d0 2 -0.6663444d-02 5.000d0 3.00d0 3 -0.8847486d-02 7.500d0 1.00d0 3 0.2272635d-02 15.000d0 2.00d0 3 -0.5588655d-03 30.000d0 4.00d0 3 #AUX !auxiliary model specification CPP polynomial fit for ideal gas heat capacity ?LITERATURE REFERENCE \ ?Tillner-Roth, R., Harms-Watzenberg, F. and Baehr, H.D. (1993). ? Eine neue Fundamentalgleichung fuer Ammoniak. DKV-Tagungsbericht 20:167-181. \ ?\ ?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 info 195.49 !lower temperature limit [K] 700.0 !upper temperature limit [K] 0.00 !upper pressure limit [kPa] 0.00 !maximum density [mol/L] 405.40d0 8.314471d0 !reducing parameters for T, Cp0 3 0 !Nterms: polynonial, exponential 2.5498533d0 -0.333333333333 !c(i), power of T 4.86079125d0 1.50 -2.74637681d0 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. (1993). ? Eine neue Fundamentalgleichung fuer Ammoniak. DKV-Tagungsbericht 20:167-181. \ ?\ !end info 195.495 !lower temperature limit [K] 700.0 !upper temperature limit [K] 0.00 !upper pressure limit [kPa] 0.00 !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 @TRN !transport model specification ECS Extended Corresponding States model for transport props (R134a ref. fluid). ?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:\ ?\ ?Clifford, A.A. and Tufeu, R. (1988). Thermal conductivity of gaseous and liquid ? ammonia. Journal of Heat Transfer 110: 992-995.\ ?\ ?Golubev, I.F. and Sokolova, V.P. (1964). The thermal conductivity of ammonia at ? various temperatures and pressures. Thermal Engineering 11: 78-82.\ ?\ ?Needham, D.P. and Ziebland, H. (1965). 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.\ ?\ ?Richter, G.N. and Sage, B.H. (1964). Thermal conductivity of fluids: Ammonia. ? J. Chem. Eng. Data 9: 75-78.\ ?\ ?Tufeu, R., Ivanov, D.Y., Garrabos, Y. and Le Neindre, B. (1984). Thermal ? conductivity of ammonia in a large temperature and pressure range including ? the critical region. Ber. Bunsen-Ges. Phys. Chem. 88: 422-427.\ ?\ ?von Franck, E.U. (1951). Zur Temperaturabhangigkeit der Warmeeleitfahigkeit ? einiger Gase. Z. Electrochemie 55: 636-643.\ ?\ ?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 from:\ ?Fenghour, A., Wakeham, W.A., Vesovic, V., Watson, J.T.R., Millat, J. and ? Vogel, E. (1995). The viscosity of ammonia. J. Phys. Chem. Ref. Data ? 24: 1649-1667.\ ? !end of info section 195.495 !lower temperature limit [K] 550.0 !upper temperature limit [K] 70000.0 !upper pressure limit [kPa] 43.04 !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] 386.0 !L-J coefficient epsilon/kB [K] 2 0 0 !number of terms in f_int term in Eucken correlation, spare1, spare 2 -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 !coeff, power of T, spare 1, spare 2 0 0 0 !number of terms in psi (visc shape factor): poly,spare1,spare2 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 ?LITERATURE REFERENCE \ ?fit of the data of:\ ?Durrant, A.A., Pearson, T.G. and Robinson, P.L. (1934). 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): ? 730-735.\ ?\ ?Laine, P. (1953). Kaeltemaschinen und -apparate: Pruefung von Kaeltemaschineteilen ? auf Dichtheit Kaeltetechnik 6: 173.(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. (1956). Surface tension of ammonia and of ? solutions of alkalai halides in ammonia. J. Am. Chem. Soc. 78: 920-923. ?\ !end info 195.495 !lower temperature limit [K] 405.40 !upper temperature limit [K] 0.00 !(dummy) upper pressure limit 0.00 !(dummy) maximum density 2 !number of terms 405.5d0 !critical temperature used in fit (dummy) 0.12190d0 1.26d0 !sigma0 and n 0.04015d0 2.26d0 #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. (1995). The viscosity of ammonia. J. Phys. Chem. Ref. Data ? 24: 1649-1667.\ ? !end of info section 195.495 !lower temperature limit [K] 600.0 !upper temperature limit [K] 50000.0 !upper pressure limit [kPa] 52.85 !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. !Lennard-Jones coefficient epsilon/kB [K] 1.0d0 1.0d0 !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.d0 0.015570557d0 !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; demoninator of rat. poly; numer of exponential; demon exponential 386.d0 1.0d0 1.0d0 !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. (1995). The viscosity of ammonia. J. Phys. Chem. Ref. Data ? 24: 1649-1667.\ ? !end of info section 195.495 !lower temperature limit [K] 600.00 !upper temperature limit [K] 0.00 !(dummy) upper pressure limit 0.00 !(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 #TCX !thermal conductivity model specification TC1 pure fluid thermal conductivity of ammonia ?LITERATURE REFERENCE \ ?Tufeu,R. Ivanov, Garrabos, and Le Neindre, B. (1984). Thermal conductivity ? of ammonia in a large temperature and pressure range including the critical ? region. Ber. Bunsenges. Phys. Chem. 88:422-427.\ ?\ !end of info section 196.0 !lower temperature limit [K] 580.0 !upper temperature limit [K] 50000. !upper pressure limit [kPa] 45.0 !maximum density [mol/L] 5 0 !# terms for dilute gas function: numerator, denominator 1.0d0 1.0d0 !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 1.0d0 0.058719010d0 1.0d0 !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 @END c 1 2 3 4 5 6 7 8 c2345678901234567890123456789012345678901234567890123456789012345678901234567890