Psychrometric Data Calculator in SI Units

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This Demonstration computes psychrometric data in SI units. In order to read all the thermal variables from a psychrometric chart, first fix the value of the dry-bulb temperature and one of these additional variables: the wet-bulb temperature, the dew point temperature, the relative humidity or the moisture content. Then use the slider to set the value of the selected variable.

Contributed by: Housam Binous and Ahmed Bellagi (October 2016)
Open content licensed under CC BY-NC-SA




[1] R. M. Felder and R. W. Rousseau, Elementary Principles of Chemical Processes, 3rd ed., New York: John Wiley & Sons, 2004.

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