FAQ

 

Adsorbent

Porous substance with a high specific surface area (m2/g) that temporarily stores atoms or molecules to be extracted from a gas.
Activated carbon and silica gel are examples of adsorbents.

 

Compression

Process whereby a same quantity of air is reduced to a lesser volume.
The higher the compression rate, the more the air temperature increases.

 

Condensation

Physical phenomenon of changing the state of the water in cooled air from a gaseous state to a liquid state when
cooled at constant pressure. The temperature at the moment of condensation is called “dew point”.

 

Flow rate

Measurement of the flow of air, gas or water in m3/h.
We address here the suction conditions:
m3/h CA or ANR : 20°C – 0 Bar eff.
CHAUMECA offers solutions for variable or constant flow rates. The CHAUMECA equipment is designed by default
for the following conditions :
T=35° and 7 Bar eff

 

Desorption

Process whereby the molecule is detached from the substrate or adsorbent to which it is linked.

 

Expansion

Pressure drop in a system reducing the temperature of the gas or air it contains.

 

Water

Fluid found in various forms depending on the temperature of the environment in which it evolves: Liquid (water), Steam (humidity) or Solid (ice).

 

Energy saving

Consommation électrique faible, consommation d’énergieOur equipment is designed for optimum energy efficiency.

 

Gaz

Set of atoms or molecules very loosely linked and virtually independent. In the gaseous state, the matter does not have a specific shape or volume: a gas tends to occupy all the available volume. This therefore explains why, when we force this same gas into a reduced volume, the molecules it contains become agitated in a lesser space. This phenomenon thus increases the pressure and temperature of the gas.
The gas also contains solid (dust, etc.), liquid (water) and even gaseous (oil vapours, etc.) pollutants that we can treat with specific systems.

 

Humidity

Air is 100% saturated in humidity when it leaves a compressor. Cooling this air produces condensation that converts this water vapour into moisture.
Absolute humidity or moisture content
The absolute humidity is the amount of water expressed in g/kg contained in the dry gas.
Each gas features the maximum quantity of moisture possible for a given temperature.
Relative humidity
The relative humidity of a gas expressed as a percentage is the rate between the actual amount of moisture contained in the gas and the maximum possible amount of moisture for a given temperature.
Moisture encourages corrosion in your installations. CHAUMECA therefore offers air and gas drying solutions.

 

Head loss

The pressure is different at the entrance and exit of any duct through which gas is flowing.
This is called head loss.
It is due to:

  • molecules rubbing against each other
  • accidents on the way (bends, restrictions, widening, etc.).

It is expressed as mbar or Pascals.
I mbar = 0,001 Bar = I00 Pa
The CHAUMECA engineers do everything possible to set up processes for this head loss that is inherent in air treatment systems.

 

Dew point

Point de rosée de -50°Expressed in °C, the dew point is the temperature below which the air is going to condense at constant pressure.
CHAUMECA designs solutions for dew points of -70° to +3°.

 

Pollutants     

We define pollutants as elements found in a gas and harmful for the system in which the gas evolves.
Solid particles in suspension (dust, micro-organisms, etc.)
Water, in vapour or liquid form
Gaseous pollutants (sulphur, oil vapours, carbonic gas, etc.)
Pollutant treatment order

  • Solid pollutants
  • Liquid pollutants
  • Gaseous pollutants
  • Humidity

The pollutants can be treated with CHAUMECA filters, separators, drain valves and condensate treatment assemblies.

 

Pressure

Installation adaptée haute pressionResult of forces due to molecules hitting the walls of an enclosed chamber.

  • The legal pressure unit is the Pascal (Pa)
  • We still use the Bar in our core businesses: I Bar = l05 Pa
  • The most common compressed air systems (pneumatic tools – motors, pneumatic valves/cylinders – actuators, instrumentation) are designed for a relative pressure of between 5 and 10 bar.

Different pressures apply to other, more specific applications:

  • Glassworks: low pressure system 3 to 4 Bar
  • Nuclear and others: high pressure system (> à IOO Bar)
  • Bottling: 30 or 40 bar systems

CHAUMECA offers high pressure equipment to respond to any situation.

 

Temperature

The temperature °C is the result of the molecular agitation. The international unit is the Kelvin (K).
The degree Celsius is defined as the hundredth part of the temperature gap noted between the melting point of ice (0°C or 273, 15°K) and the boiling of pure water (100°C or 373, 15°K) at normal pressure (101325 Pa).