In many applications, the relative humidity must be calculated from the dew point. This is particularly difficult under high pressures due to the non-ideal behavior of hydrogen.
The following calculator processes the input "Dew point at atmospheric pressure" and converts it to "Water content at atmospheric pressure".
Note: At atmospheric pressure, the value in µmol/mol is identical to the volume-based value in ppm (V). All calculations are based on the real gas behavior of hydrogen.
Hinweis: Unter Atmosphärendruck ist die Angabe in µmol/mol identisch zu der volumenbezogenen Angabe ppm (V). Für alle Berechnungen wird das Realgasverhalten von Wasserstoff zugrunde gelegt.
If the pressure-related dew point is to be calculated from the water content, the following calculator must be used.
Note: At atmospheric pressure, the unit ppm (V) is identical to µmol/mol. After compression, the ppm (V) value increases depending on the compressibility of hydrogen.
Thus, the temperature at which water condenses out of hydrogen is higher at higher pressures — the dew point and the water content in volume fractions (ppm(V)) increase. All calculations are based on the real gas behavior of hydrogen.
Hinweis: Bei Atmosphärendruck ist die Einheit ppm (V) identisch zur Angabe in µmol/mol. Nach Verdichtung steigt der Wert für ppm (V) jedoch in Abhängigkeit von der Kompressibilität von Wasserstoff an.
Thus, the temperature at which water condenses out of hydrogen is higher at higher pressures — the dew point and water content in volume fractions (ppm(V)) increase. All calculations are based on the real gas behavior of hydrogen.
All online tools have been programmed to the best of my knowledge; however, errors cannot be entirely excluded. Any use is therefore at your own risk. Any legal or financial claims are excluded.