Our air handling units

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The choice of cooling function depends on several factors:

• arrow_rightCooling requirements: cooling capacity required, temperature to be reached...
• arrow_rightBuilding configuration: number of zones to be cooled, architectural constraints, integration...
• arrow_rightIndoor air quality: Importance of filtration and air renewal.
• arrow_rightBudget: Investment and operating costs.
• arrow_rightEnvironmental regulations: Compliance with current refrigerant standards.
  
  

Cold production methods:

• arrow_rightDirect expansion: Simplicity, energy efficiency, low installation costs.
• arrow_rightWater-cooled: Highly flexible, precise temperature control, heat recovery possible.
• arrow_rightMixed: Combination of the two previous systems, optimizing the advantages of each and providing other cooling modes as back-up.

The choice between direct expansion, water or mixed, as well as the choice of refrigerant, is made on a project-by-project basis.

Refrigerants have a direct influence on energy efficiency and environmental impact. We can offer you solutions with :

• arrow_rightHFO (Hydrofluorolefins): New-generation refrigerants with very low global warming potential (GWP) and high energy efficiency, such as R1234, R454, R32...

thermostat

The various heating functions:

• arrow_rightHot-water coils: Using an external hot-water circuit for precise temperature control, with good energy efficiency and the option of combining with other heat sources.
• arrow_rightElectric heaters: Simple installation, precise temperature control.
• arrow_rightReversible systems: High energy efficiency, the ability to heat and cool with a single piece of equipment, reduced carbon footprint.

Each of these elements plays a specific role in heat production and distribution.

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Plant-integrated humidification systems with immersed electrode or ultrasonic technologies installed directly inside a cabinet. They enable precise control of humidity levels.

Immersed electrode technology

• arrow_rightPrinciple: An electric current is applied between two electrodes immersed in water. This current triggers electrolysis, producing hydrogen and oxygen. The hydrogen thus generated reacts with the humidity present in the confined air, forming water which is then evacuated.
• arrow_rightAdvantages: Highly efficient for small air volumes. Quiet. No need for additional chemicals.
  
  

Ultrasonic technology

• arrow_rightPrinciple: High-frequency vibrations are generated by piezoelectric transducers. These vibrations create tiny air bubbles which implode on contact with a surface, generating a mist of water. This fine mist absorbs humidity from the air.
• arrow_rightRequirements: Demineralized water supply.
• arrow_rightAdvantages: Very quiet. No moving parts, so high reliability. Can also be used for air purification.
  
  

Choice of technology

The choice between these two technologies depends on several factors:

• arrow_rightEnclosure volume: For small volumes, immersed electrode technology is often sufficient. For larger volumes, ultrasonic technology may be more appropriate.
• arrow_rightHumidity level to be achieved: Immersed electrode technology is generally more effective at achieving very low humidity levels.
• arrow_rightNoise requirements: Both technologies are quiet, but ultrasonic technology is generally considered even quieter.
• arrow_rightMaintenance: Immersed electrode technology requires more regular maintenance than ultrasonic technology.

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Cabinet dehumidification is achieved by direct expansion, which regulates the humidity level in the air.
The principle is simple yet effective: by cooling the air, the humidity it contains condenses.
However, the refrigeration circuit and its components (evaporator, condenser, electric coil, etc.) must be sized appropriately.

Advantages of direct expansion dehumidification:

• arrow_rightIt's a highly effective method for reducing relative air humidity.
• arrow_rightNo complex additional components are required.

air

Our cabinets are generally fitted with high-efficiency variable-speed fans (EC): a wise choice for many applications.

EC (Electronic Commutation) fans are permanent-magnet synchronous electric motors that offer a number of advantages over conventional motors:

• arrow_rightHigh energy efficiency: They consume less energy for a given performance, thus reducing operating costs.
• arrow_rightPrecise speed control: Rotational speed can be infinitely adjusted, allowing airflow to be optimized as required.
• arrow_rightLong service life: Their robust design and absence of brushes make them long-lasting.
• arrow_rightLow noise: They are generally quieter than conventional motors.
  
  

Different fan types are available: motor-turbine, centrifugal or axial.

The choice of fan type will depend primarily on the characteristics of your application, including :

• arrow_rightAir flow required: The air flow required for your application will determine the fan size.
• arrow_rightStatic pressure: The pressure the fan must generate to overcome network resistances (ducts, filters, etc.) is a key factor.
• arrow_rightFootprint: The space available for fan installation is an important constraint.
• arrow_rightNoise level: The acceptable noise level in the installation environment.
  
  

For pressures of 50 to 600 Pa, centrifugal or motor-turbine fans are generally the most suitable. They are capable of generating higher pressures than axial fans.

Factors to consider when making your final choice

• arrow_rightCharacteristic curve: The fan's characteristic curve (relationship between flow rate and pressure) must be adapted to your application.
• arrow_rightMaterial of construction: The choice of material will depend on the environment (temperature, corrosivity, etc.).
• arrow_rightVibration level: Vibration can generate noise and mechanical stress.
• arrow_rightEnergy efficiency: Fan efficiency must be optimized to reduce operating costs.

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The M5 filter is designed for use in cooling cabinets because of its efficiency in retaining dust particles and medium-sized pollutants. It offers a good compromise between filtration capacity and pressure drop.

Depending on your specific requirements, other filter media may be considered:

• arrow_rightF7 filters: Offer better filtration than M5, but with a higher pressure drop.
• arrow_rightF9 filters: Ideal for very clean environments, they retain a large number of fine particles.
• arrow_rightHEPA filters: HEPA (High Efficiency Particulate Air) filters offer extremely fine filtration, retaining over 99.97% of particles 0.3 micrometers and larger. They are used in environments requiring very high air purity.
• arrow_rightCleanable filters: an economical and ecological solution for limiting environmental impact and reducing the costs associated with frequent filter replacement.