Psychrometric Chart Celebrates 100th Anniversary

What is psychrometrics? One Web site calls it the dreaded “Pword!” Psychrometrics is a subscience of physics dealing with the properties and processes of moist air. Moist air is defined as a mixture of two gases: dry air and water vapor (the gas phase of H2O). Some broaden the definition of psychrometrics to cover mixtures of the gas of one substance (any dry gas component) and the condensable vapor of a second substance. Psychrometrics is not confined to the world of air conditioning. It is used in the fields of agricultural and aeronautical engineering, food engineering, drying of crops, grains, and pharmaceuticals, dehydration, dehumidification, humidification, moisture control, meteorology, and weather reporting.

Authors: Donald P. Gatley, P.E., Fellow/Life Member ASHRAE

Citation: ASHRAE Journal, Vol. 46, No. 11

Pages: 16-20

Publish Date: November 2004

Publisher: ASHRAE

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