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Halton - air diffusion design guide

Halton - air diffusion design guide
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Air diffusion solutions for various applications in commercial buildings and industrial facilities. >

Mixing ventilation applications are realised using the following supply air jet types: > Radial jet Compact jet Swirl jet Plane jet Jet behaviour varies with Jet type Օ Horizontal direction of the jet Vertical direction of the jet Օ Supply air flow rate Temperature difference between supply and room air Other important factors are: Օ Interaction with jets from other diffusers Interaction with other air flows (convective currents etc.) Օ Obstacles in the air flow pathThe jet type of certain diffusers can be adapted to the application, such as: From radial to compact (swirl diffuser TSA) Օ...

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Distance of jet detachment, L > d The distance of jet detachment (L > d ) is the distance from the diffuser centreline at which the air jet detaches from the ceiling and starts to fall downward. It is useful when cool air is supplied into the space. Minimum distance between diffusers, L > min The minimum distance between two diffusers, distance, L Minimum distance between diffuser and flow obstacle The minimum distance (L > min , is the minimum distance necessary between diffuser centrelines for achieving air velocities below 0.25 m/s in the occupied zone. Note that when two jets collide...

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Acceptable selection is studied : Check that L DKR-200-450 (R4) > d is sufficiently long in respect of the room width Օ Check that the distance between diffusers is greater than L Total sound pressure level: 33 dB(A) Օ Total pressure drop: 13 Pa L > d = 3.6 m OK; distance from diffuser to occupied zone limit = 3.3 m, 2.9 m 2.2 m Օ v > min Check that there are no flow obstacles closer than distance L > 1 =0,10 m/s v > 3 =0,20 m/s Օ > obs => approx. 0.5 x L > min from the diffuser Check the air velocity of the jet entering the occupied zone, v $ T > v1 = 0,1 հC $ T > v3 = 0,5 C OK; on both...

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