Dry air technics
Dry air technologies & systems: Control humidity in industrial processes | Dessica
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General information on air and humidity
As a result of continuous evaporation, the air we breathe and live in is a mixture of dry air and water vapour in varying proportions. Dry air is made up of a mixture of gases (mainly nitrogen and oxygen) in almost invariable proportions and has a density of 1.29 kg/m3 at 0°C and atmospheric reference pressure (101,325 Pa).
The physical properties of air depend on three parameters:
- Pressure expressed in Pascal
- The dry temperature expressed in degrees Celsius or Kelvin
- A characteristic parameter of the dry air/water vapour mixture
- Several parameters characteristic of the dry air/water vapour mixture are used.
Air humidity-related phenomena
- Condensation
- Water vapour transfer (humidification or drying)
- Corrosion
Air dehumidification processes
- Dehumidification by refrigeration (or condensation)
- Dehumidification (or dehydration) using solid adsorbents
- Dehumidification (or dehydration) using liquid sorbents