Thermophysical Properties: Ammonia
From Thermal-FluidsPedia
Ammonia, NH3, Molecular Mass: 17.0, (Tsat = 239.9 K; Tm = 195.5 K) T Temp. K pv saturation pressure (106 Pa) hlv latent heat (kJ/kg) ρℓ liquid density (kg/m³) ρv vapor density (kg/m³) μℓ liquid viscosity (10-6 N-s/m²) μv vapor viscosity (10-6 N-s/m²) kℓ liquid thermal conductivity (W/m-K) kv vapor thermal conductivity (W/m-K) σ liquid surface tension a (10-3N/m) cp,ℓ liquid specific heat (kJ/kg-K) cp,v vapor specific heat a (kJ/kg-K) 200 0.008646 1477 728.9 0.08899 407 7.64 0.709 4.606 1.979 210 0.017746 1451 717.5 0.1746 369 8.02 0.685 4.375 2.033 220 0.033811 1425 705.8 0.3190 334 8.40 0.661 0.0158 4.346 2.083 230 0.060439 1398 693.7 0.5489 302 8.78 0.638 0.0171 4.382 2.151 240 0.10226 1369 681.4 0.8972 273 9.16 0.615 0.0184 33.9 4.431 2.237 250 0.16496 1339 668.9 1.404 245 9.54 0.592 0.0199 31.5 4.483 2.343 260 0.25529 1307 656.1 2.115 220 9.93 0.569 0.0211 29.2 4.539 2.467 270 0.38100 1273 642.9 3.086 197 10.31 0.546 0.0224 26.9 4.597 2.611 280 0.55077 1237 629.2 4.380 176 10.70 0.523 0.0239 24.7 4.662 2.776 290 0.77413 1198 615.0 6.071 157.7 11.07 0.500 0.0256 22.4 4.734 2.963 300 1.0614 1159 600.2 8.247 141.0 11.45 0.477 0.0277 20.2 4.815 3.180 310 1.4235 1113 584.6 11.01 126.0 11.86 0.454 0.0302 18.0 4.909 3.428 320 1.8721 1066 568.2 14.51 113.4 12.29 0.431 0.0332 15.9 5.024 3.725 330 2.4196 1014 550.9 18.89 101.9 12.74 0.408 0.0368 13.7 5.170 4.088 340 3.0789 958 532.4 24.40 92.1 13.22 0.385 0.0415 11.7 5.366 4.545 350 3.8641 895 512.3 31.34 83.2 13.74 0.361 0.0467 9.60 5.639 5.144 360 4.7902 825 490.3 40.18 75.4 14.35 0.337 0.0536 7.67 6.042 5.978 370 5.8740 745 465.5 51.65 68.5 15.07 0.313 0.0614 5.74 6.677 7.217 380 7.1352 649 436.5 67.16 61.1 15.96 0.286 0.0700 3.98 7.795 9.312 390 8.5977 529 400.2 89.85 50.3 17.14 0.254 0.0800 2.21 10.27 13.86
Propertya Temp. α0 α1 α2 α3 α4 α5 Error (%) pv (106Pa) 200 – 390 K -62.865 7.0518-1b -3.4742-3 9.3187-6 -1.3074-8 7.5491-12 0.20 hlv (kJ/kg) 200 – 390 K 11507 -183.01 1.3511 -4.9982-3b 9.1651-6 -6.7220-9 0.22 ρℓ (kg/m³) 200 – 390 K 15.720 -1.6835-1 1.2492-3 -4.6323-6 8.5208-9 -6.2525-12 0.10 ρv (kg/m³) 200 – 390 K -72.638 9.5217-1 -5.3865-3 1.6458-5 -2.6195-8 1.7156-11 0.83 μℓ (10-6Ns/m²) 200 – 390 K 52.913 -8.5184-1 6.2226-3 -2.2649-5 4.0580-8 -2.8649-11 1.07 μv (10-6Ns/m²) 200 – 390 K -3.6761 9.0960-2 -6.2940-4 2.3334-6 -4.4046-9 3.3532-12 0.13 kℓ (W/m-K) 200 – 390 K 13.276 -2.4537-1 1.7877-3 -6.5246-6 1.1785-8 -8.4743-12 0.22 kv (W/m-K) 200 – 390 K -6.8670 -4.7528-2 8.9143-4 -4.7431-6 1.0675-8 -8.6786-12 0.62 σc (10-3 N/m) 240 – 390 K 338.91 -4.1174 2.4029-2 -7.3673-5 1.1159-7 -6.6186-11 0.63 cp,ℓ(kJ/kg-K) 200 – 390 K -14.697 3.7537-1 -3.2928-3 1.3844-5 -2.8160-8 2.2354-11 1.03 cp,v(kJ/kg-K) 200 – 390 K -57.892 1.1165 -8.4409-3 3.1568-5 -5.8318-8 4.2728-11 0.62
a Polynomial function: ln(Property) = α0 + α1T + α2T2 + α3T3 + α4T4 + α5T5
b The notation 7.0518-1 signifies 7.0518×10-1
c Polynomial Function: Property = α0 + α1T + α2T2 + α3T3 + α4T4 + α5T5
References
Dunn, P. and Reay, D.A. 1982, Heat Pipes, Pergamon Press, New York.
Faghri, A., and Zhang, Y., 2006, Transport Phenomena in Multiphase Systems, Elsevier, Burlington, MA.
Faghri Amir , Zhang Yuwen , Howell John, 2010, Advanced Heat and Mass Transfer, Global Digital Press, Columbia, MO
Rohsenow, W.N., Hartnett, J.P., and Ganic, E.N. eds., 1985, Handbook of Heat Transfer Fundamentals, McGraw-Hill, New York, NY.
Vargaftik, N.B., 1975, Handbook of Physical Properties of Liquids and Gases, Hemisphere, New York, NY.