Liquid Ammonia - Thermal Properties at Saturation Pressure
Density, specific heat, thermal conductivity, viscosity and Prandtls no. of liquid ammonia 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:
| Temperature - t - (oC) | Density - ρ - (kg/m3) | Specific Heat | 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 |
| Temperature - t - (oF) | Density - ρ - (lb/ft3) | Specific Heat | Thermal Conductivity - λ - (Btu/(hr ft oF) | 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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