DFRE-GR-TR Thermo-adjustable blade swirl diffusers

Thermo-adjustable blade swirl diffuser 21 DFRE-GR-TR Thermo-adjustable swirl diffuser, model DFRE-GR-TR, provides an optimum discharge in cooling (horizontal discharge) and heating (vertical discharge) enabling the diffuser to meet the required comfort criteria by movement of its blades. The diffuser is available in 6 sizes ranging from Ø200 mm to Ø 500 mm in manually or thermo-adjustable versions. Increasingly stringent design requirements including higher supply flow rates, lower velocities, thermal gradients in the occupied zone and also the aesthetics have made swirl diffusers a better choice...

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Models and dimensions: DFRE-GR-PR-TR DIMENSIONS

Technical data Photo 1 Photographs of the DFRE-GR-TR tests in R&D Koolair laboratory The DFRE-GR-TR diffuser includes a component that expands or contracts when the supply air temperature varies, by means of a mechanism that changes the blade position without the need to do this manually. As a result, when hot air is supplied, the thermal component shifts the set of blades upward, causing the air to flow out vertically (Photo 1). Likewise, when cold air is supplied, the thermal component shifts blades downward, causing the air to flow out horizontally, thereby producing the Coanda or ceiling...

X_8K Throw for maximum velocity in occupied area of 0.25 m/s, AT= -8 K and an installation height of 3 m, considering Coanda effect, in m APt Total pressure drop, in Pa Lw Sound power level, in dB(A)

Vz Maximum velocity in occupied area, in m/s X Throw in m, for the determined maximum velocity Induction rate Ratio between temperature SYMBOLS Distance from the diffuser Air volume in the outlet of the diffuser (primary air) Air volume at the distance X from the diffuser

y0 5 Vertical penetration for a velocity of 0,5 y0 25 Vertical penetration for a velocity of 0,25 m/s, AT= 8 K APt Total pressure drop in Pa Lw Sound power level in dB(A)

Induction rate Y Maximal vertical penetration in m Correction factor (C) for vertical penetration at different blade angle. SYMBOLS X(m) Distance from the diffuser q0 Air volume in the outlet of the diffuser (primary air) qx Air volume at the distance X from the diffuser

DFRE-GR-TRProduct code The product code shown below is used to define both the diffuser as well as the plenum Thermoadjustable blade swirl diffuser, size 315 mm coated in white RAL 9010.

THIS CATALOGUE IS INTELLECTUAL PROPERTY. Reproduction, either partial or total, by any means, including electronic, is prohibited without prior written authorisation from KOOLAIR, S.A. CIN-DFRE-GR-TR-1012-00

KOOLAIR, S.A. Calle Urano, 26 Poligono industrial nº 2 – La Fuensanta 28936 Móstoles - Madrid - (España) Tel: +34 91 645 00 33 Fax: +34 91 645 69 62 e-mail: [email protected]