In many applications, the relative humidity must be calculated from the dew point. This is only possible manually with great effort, especially under high pressures, due to the non-ideal behavior of hydrogen.
The following calculator processes the input "Dew point at atmospheric pressure", and converts this value to "Water content at atmospheric pressure".
Note: Under atmospheric pressure, the specification in ymol/mol is identical to the volume-related specification ppm (V). All calculations are based on the real gas behavior of hydrogen.
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 the specification in ymol/mol. After compression, however, the value for ppm (V) increases as a function of the compressibility of hydrogen.
Thus, the temperature above which water condenses out of hydrogen is higher at higher pressures, the dew point and the water content in volume fractions (ppm(V)) increases. All calculations are based on the real gas behavior of hydrogen.
I have programmed all online tools to the best of my knowledge and belief, but errors can of course still not be ruled out. Any use is therefore at your own risk. Any legal or recourse claims are excluded.