Psychrometric Properties: STD ATM
30.0 10 to 30.0 90
Psychrometric properties of moist air — humidity ratio, enthalpy, dew point, wet-bulb temperature, and specific volume as functions of dry-bulb temperature and relative humidity; also includes saturation thermodynamic and transport properties (viscosity, thermal conductivity, Prandtl number, density) from ASHRAE 2021 tabulated data
| pressure condition | lookup key | dew point C (C) | dry bulb C (C) | enthalpy kJ kg (kJ/kg) | humidity ratio kg kg (kg/kg) | relative humidity pct (%) | specific volume m3 kg (m3/kg) | standard | wet bulb C (C) |
|---|---|---|---|---|---|---|---|---|---|
| STD ATM | 30.0 10 | -4.92 | 30 | 36.872 | 0.002617 | 10 | 0.8624 | ASHRAE Fundamentals 2017 Ch.1 | 12.74 |
| STD ATM | 30.0 100 | 30.04 | 30 | 99.732 | 0.027203 | 100 | 0.8963 | ASHRAE Fundamentals 2017 Ch.1 | 30.08 |
| STD ATM | 30.0 20 | 4.63 | 30 | 43.62 | 0.005257 | 20 | 0.866 | ASHRAE Fundamentals 2017 Ch.1 | 15.9 |
| STD ATM | 30.0 30 | 10.57 | 30 | 50.426 | 0.007918 | 30 | 0.8697 | ASHRAE Fundamentals 2017 Ch.1 | 18.37 |
| STD ATM | 30.0 40 | 14.97 | 30 | 57.289 | 0.010603 | 40 | 0.8734 | ASHRAE Fundamentals 2017 Ch.1 | 20.45 |
| STD ATM | 30.0 50 | 18.48 | 30 | 64.212 | 0.01331 | 50 | 0.8772 | ASHRAE Fundamentals 2017 Ch.1 | 22.3 |
| STD ATM | 30.0 60 | 21.43 | 30 | 71.193 | 0.016041 | 60 | 0.8809 | ASHRAE Fundamentals 2017 Ch.1 | 24 |
| STD ATM | 30.0 70 | 23.97 | 30 | 78.236 | 0.018795 | 70 | 0.8847 | ASHRAE Fundamentals 2017 Ch.1 | 25.6 |
| STD ATM | 30.0 80 | 26.21 | 30 | 85.339 | 0.021573 | 80 | 0.8886 | ASHRAE Fundamentals 2017 Ch.1 | 27.13 |
| STD ATM | 30.0 90 | 28.22 | 30 | 92.504 | 0.024376 | 90 | 0.8924 | ASHRAE Fundamentals 2017 Ch.1 | 28.62 |
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