AIR DISTRIBUTION IN THE LABORATORY

The requirements for air distribution systems in the laboratory are particularly high. To avoid exposure to pollutants, large airflows must be exchanged in a short time: According to DIN 1946-7, the standard is an air change rate of 8 times the room volume per hour (this might differ from country to country). Due to the heat loads caused by laboratory equipment, cooling of the rooms is also often required in summer, as well as in winter. At the same time, it is important to avoid drafts and high temperature differences in order to ensure highest comfort for employees. To fully meet all requirements, intelligent air distribution that adapts to the specific conditions of your laboratory is essential.

Several aspects determine a customised air distribution concept:

  • The position and nature of the furniture in the laboratory influence the airflows and should definitely be taken into account when planning the air distribution. By individually arranging the air terminal devices in the room, the air distribution can be adapted to the specific conditions of the laboratory.

  • The amount of heat to be dissipated from the laboratory, the room cooling load, varies depending on the use and quantity of laboratory equipment used. The pollutant load of the laboratory results in the individually required air change rate, thus the frequency at which the laboratory air must be exchanged per hour.

  • For thermal comfort in the laboratory, the temperature difference must be dissipated either by air or water.

  • Avoiding drafts is an important criterion for achieving the greatest possible comfort in the laboratory. Technical disturbances due to improper air drafts are therefore prevented.

  • Despite the high air change rate in the laboratory, the air intake and extraction should be as quiet as possible.

TAILOR-MADE AIR TERMINAL DEVICES FOR VARIOUS AIRFLOW STRATEGIES

Various airflow strategies are available for air distribution in laboratories, such as mixed air (turbulent flow), laminar flow with targeted low turbulance and classic laminar flow diffusion.

With mixed ventilation, the supply air is introduced into the room via highly inductive diffusers. This creates turbulent air flows so that the introduced air mixes with the indoor air.

Laminar flow describes the low-turbulence supply air intake via laminar diffusers. In this case, the supply air has only a low velocity and displaces the polluted room air instead of mixing with it. A special type of displacement flow ventilation is Displacement flow (with supply air discharge usually near the floor), in which the cooler supply air is brought into the room and the air exchange takes place through natural thermal draft.

AIRFLOW STRATEGIES IN THE LABORATORY

TURBULENT FLOW

With turbulent mixed ventilation, the laboratory air can be easily controlled by the placement of the customised supply air diffusers.

The introduction of supply air creates a diffuse airflow that mixes indoor and supply air.

This compensates for temperature differences and ensures thermal comfort. At the same time, the air change rate intended for the laboratory is ensured by the air exchange. 

TARGETED LOW-TURBULENCE LAMINAR FLOW (PCD)

The PROCONDIF® ventilation system is particularly suitable for laboratories. With low-turbulence air flow, large volume flow rates with medium temperature differences can be introduced at the same time.

The 30° inclination of the jet guidance in the PROCONDIF® air terminal devices prevents the Coanda effect by creating a bell-shaped air distribution in the room without swirling the incoming air.

As a result, a controlled ventilation of the laboratory rooms is ensured, avoiding any induction of air from the fume cupboard into the room.

LOW-TURBULENCE LAMINAR FLOW (LF) 

Low turbulence laminar flow (LF) is characterised by a uniform velocity profile and almost parallel flow lines.

In this process, the airflow velocity is rapidly reduced, creating an almost low-turbulence air curtain with low velocities.

Low-turbulence laminar flow is used where processes are particularly sensitive, e.g., in high-precision scales.

CHOOSING THE RIGHT AIR TERMINAL DEVICE

The air terminal devices and their placement in the laboratory are the most important components of the ventilation system to ensure comfort, as well as compliance with all safety standards at the same time. The specific conditions of the laboratory are decisive for the choice of suitable elements. 

WE WILL GLADLY ASSIST YOU! 

VDW

With low sound power level for comfort zones, with individually manually adjustable air control blades

VDW

With low sound power level for comfort zones, with individually manually adjustable air control blades
VDW

TDF-SilentAIR

With very low sound power level for comfort zones, with fixed air control blades

TDF-SilentAIR

With very low sound power level for comfort zones, with fixed air control blades
TDF-SilentAIR

PROCONDIF® TYPE PCD  

PROCONDIF® TYPE PCD  

PROCONDIF® TYPE PCD  

TFM 

For critical air cleanliness and critical hygiene requirements, suitable for ceiling installation

TFM 

For critical air cleanliness and critical hygiene requirements, suitable for ceiling installation
TFM 


CONSULTING AND PROJECT DEVELOPMENT

I AM HAPPY TO ASSIST YOU

We will be happy to help you with the individual planning and implementation of air distribution strategies for your laboratories. Arrange your non-binding consultation now!

Patric Unterdorfer

Global Key Client Manager Pharma & Food

Phone: +49 (0) 2845 202 1128

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