Article | REF: BE8025 V2

Moist Air. Basics and measurement

Authors: Bernard CRÉTINON, Bertrand BLANQUART

Publication date: December 10, 2017 | Lire en français

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1. Atmospheric air

1.1 Typical atmosphere composition

According to the International Civil Aviation Organization (ICAO), typical dry air is defined on the following basis:

air is considered a perfect gas;
it is free of water vapour;
the physical constants are as follows :
- molar mass M _a : 28.96455 · 10 ^–3 kg · mol ^–1 ,
- atmospheric pressure at sea level: 101,325 Pa,
- temperature at sea level: 15°C,
- density at sea level:...

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Atmospheric air

(1) - HARRISON (L.P.) - Fundamental concepts and definitions relating to humidity. - Humidity and Moisture, 3, p. 3-69 (1965).
(2) - HARRISON (L.P.) - Some fundamental considerations regarding psychrometry. - Humidity and Moisture,...