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Liquid Ammonia - Thermal Properties at Saturation Pressure

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At atmospheric pressure, ammonia, NH3, is present as a liquid at temperatures below -33.6 °C (-28.5 °F). At 10 bara, the condensation/boiling point is 25 °C (77 °F). For more details about phase transitions, see ammonia phase diagram .

Below the tables, properties of liquid ammonia at saturation pressure as function of temperatur, are shown in figures.

Thermal properties of liquid ammonia at saturation pressure :

Liquid Ammonia - Thermal Properties at Saturation Pressure - SI Units
Temperature
- t -
( oC)
Density
- ρ -
(kg/m3 )

Specific Heat
(Heat Capacity)
- c p -
(kJ/(kg K))

Thermal Conductivity
- λ -
(W/(m K))
Dynamic Viscosity
- η -
( 10-6 Pa s)
Prandtl's no.
-50 698 4.45 0.547 317 1.98
0 636 4.61 0.540 169 1.40
20 609 4.74 0.521 138 1.29
50 561 5.08 0.477 103 1.26
Liquid Ammonia - Thermal Properties at Saturation Pressure - Imperial Units
Temperature
- t -
( o F)
Density
- ρ -
(lb/ft3 )

Specific Heat
(Heat Capacity)
- c p -
(Btu/(lb m o F))

Thermal Conductivity
- λ -
(Btu/(hr ft o F)
Dynamic Viscosity
- η -
( 10-6 lb/(ft s))
Prandtl's no.
-58 43.4 1.06 0.32 213 1.98
32 39.7 1.10 0.31 113 1.40
68 38 1.13 0.3 93 1.29
122 35 1.21 0.28 69 1.26









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