Psychrometric Properties: STD ATM
-31.0 100 to -40.0 100
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 | Pr da | Pr s | Ws kg kg (kg/kg) | cp da kJ kgK (kJ/(kg·K)) | cp s kJ kgK (kJ/(kg·K)) | dry bulb C (C) | hda kJ kg (kJ/kg) | hs kJ kg (kJ/kg) | lambda da W mK (W/(m·K)) | lambda s W mK (W/(m·K)) | mu da uPas (uPa·s) | mu s uPas (uPa·s) | nu da 1e6m2 s (1e-6 m2/s) | nu s 1e6m2 s (1e-6 m2/s) | relative humidity pct (%) | rho da kg m3 (kg/m3) | rho s kg m3 (kg/m3) | sda kJ kgdaK (kJ/(kg·K)) | ss kJ kgdaK (kJ/(kg·K)) | vda m3 kg (m3/kg) | vs m3 kg (m3/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STD ATM | -31.0 100 | 0.7162 | 0.7162 | 0.000211 | 1.0056 | 1.0058 | -31 | -31.172 | -30.656 | 0.02194 | 0.02194 | 15.63 | 15.63 | 10.71 | 10.71 | 100 | 1.459 | 1.459 | -0.1211 | -0.1189 | 0.6852 | 0.6855 |
| STD ATM | -32.0 100 | 0.7163 | 0.7164 | 0.00019 | 1.0056 | 1.0057 | -32 | -32.178 | -31.714 | 0.02186 | 0.02186 | 15.58 | 15.57 | 10.63 | 10.63 | 100 | 1.465 | 1.465 | -0.1253 | -0.1232 | 0.6824 | 0.6826 |
| STD ATM | -33.0 100 | 0.7165 | 0.7166 | 0.000171 | 1.0056 | 1.0057 | -33 | -33.183 | -32.766 | 0.02178 | 0.02178 | 15.52 | 15.52 | 10.55 | 10.55 | 100 | 1.472 | 1.471 | -0.1295 | -0.1276 | 0.6795 | 0.6797 |
| STD ATM | -34.0 100 | 0.7167 | 0.7168 | 0.000154 | 1.0056 | 1.0057 | -34 | -34.189 | -33.815 | 0.02171 | 0.0217 | 15.47 | 15.47 | 10.47 | 10.47 | 100 | 1.478 | 1.478 | -0.1337 | -0.132 | 0.6767 | 0.6769 |
| STD ATM | -35.0 100 | 0.7169 | 0.717 | 0.000138 | 1.0056 | 1.0057 | -35 | -35.195 | -34.859 | 0.02163 | 0.02162 | 15.42 | 15.42 | 10.39 | 10.39 | 100 | 1.484 | 1.484 | -0.1379 | -0.1364 | 0.6738 | 0.674 |
| STD ATM | -36.0 100 | 0.7171 | 0.7172 | 0.000124 | 1.0056 | 1.0057 | -36 | -36.2 | -35.899 | 0.02155 | 0.02154 | 15.36 | 15.36 | 10.31 | 10.31 | 100 | 1.49 | 1.49 | -0.1421 | -0.1408 | 0.671 | 0.6711 |
| STD ATM | -37.0 100 | 0.7173 | 0.7174 | 0.000111 | 1.0056 | 1.0057 | -37 | -37.206 | -36.936 | 0.02147 | 0.02146 | 15.31 | 15.31 | 10.23 | 10.23 | 100 | 1.497 | 1.497 | -0.1464 | -0.1451 | 0.6682 | 0.6683 |
| STD ATM | -38.0 100 | 0.7175 | 0.7176 | 0.000099 | 1.0057 | 1.0057 | -38 | -38.211 | -37.97 | 0.02139 | 0.02138 | 15.26 | 15.26 | 10.15 | 10.15 | 100 | 1.503 | 1.503 | -0.1506 | -0.1495 | 0.6653 | 0.6654 |
| STD ATM | -39.0 100 | 0.7177 | 0.7178 | 0.000089 | 1.0057 | 1.0057 | -39 | -39.217 | -39.002 | 0.02131 | 0.0213 | 15.21 | 15.2 | 10.07 | 10.07 | 100 | 1.51 | 1.509 | -0.1549 | -0.1539 | 0.6625 | 0.6626 |
| STD ATM | -40.0 100 | 0.7179 | 0.718 | 0.000079 | 1.0057 | 1.0058 | -40 | -40.223 | -40.031 | 0.02122 | 0.02122 | 15.15 | 15.15 | 9.994 | 9.994 | 100 | 1.516 | 1.516 | -0.1592 | -0.1583 | 0.6596 | 0.6597 |
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