Maquetación 1 - Koolair

DFRE-GR-TR

DFRE-GR-TR 1Thermo-adjustable blade swirl diffuserCONTENTSPageDescription 2Models and dimensions 3Technical data 5Product codes 10

2DFRE-GR-TRThermo-adjustable blade swirl diffuserDFRE-GR-TRThermo-adjustable swirl diffuser, model DFRE-GR-TR, provides anoptimum discharge in cooling (horizontal discharge) and heating(vertical discharge) enabling the diffuser to meet the requiredcomfort criteria by movement of its blades.DFRE-GR-TRThe diffuser is available in 6 sizes ranging from Ø160 mm to Ø 400mm in manually or thermo-adjustable versions. Increasinglystringent design requirements including higher supply flow rates,lower velocities, thermal gradients in the occupied zone and alsothe aesthetics have made swirl diffusers a better choice for airdiffusion.This is due to its high induction rate which can reduce velocities,airflow and obtain better thermal gradient conditions in the occupiedzone.Operation:The adjustable blade swirl diffuser allows the air dischargepattern to alter between horizontal and vertical by moving itsblades. This movement can be carried out manually or by a thermalelement which positions the blades depending on the supply airtemperature.The DFRE-GR-TR diffusers should ideally be mounted at heights inexcess of 3.5 m for supplying cooled, isothermal and heated air.This diffuser is an ideal choice for high ceilings applications in areassuch as airports, factories and public buildings due to its highaesthetic appeal, ease of installation, regulation, and high airvolume capacity.These diffusers can be incorporated in square panels for adaptioninto “lay in” tile replacement ceilings.DFRE-GR-Q-PR-TRMade of steel sheet, coated in white RAL 9010. Special finishesavailable upon request.The plenum box includes within the spigot a volume control damper,accessible from the side of the plenum, made of perforated sheet.If required plenum boxes can be provided with interior insulation.DFRE-GR-PR-TRThe thermoadjustable blade swirl diffuser integrated within aperforated plate has been developed for supply and extractapplications. The diffuser consists of a fixed perforated plate orhinged for easy access from the diffuser face, with athermoadjustable swirl diffuser on the rear.DFRE-GR-C-PR-TRManufactured from steel sheet, coated in white RAL 9010. Specialfinishes available upon request. The plenum box incorporates in thespigot a volume control damper, accessible from the side of theplenum, made of perforated sheet. If required, plenum boxes can beprovided with interior insulation.

DFRE-GR-TR 3Models and dimensions: DFRE-GR-TRDIMENSIONSMODEL ØA ØB ØC D E160 163 159 124 300 253200 203 199 159 340 303250 253 249 199 390 353315 318 314 249 455 418355 358 354 249 495 458400 403 399 314 540 503

4 DFRE-GR-TRModels and dimensions: DFRE-GR-PR-TRDIMENSIONSMODELDFRE-GR-PR-TR DFRE-GR-PR-Q-TRL1 x L2L1 x L2ØA ØB ØC D160163 159 124 265200 203 199 159 300250 253 249 199 340594 x 1194 594 x 594315 318 314 249 390355 358 354 249 390400 403 399 314 455

DFRE-GR-TR 5Technical dataPhoto 1Photo 2Photographs of the DFRE-GR-TR tests in R&D Koolair laboratoryThe DFRE-GR-TR diffuser includes a component that expands or contracts when the supply air temperature varies, bymeans of a mechanism that changes the blade position without the need to do this manually. As a result, when hot air issupplied, 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 effect (Photo 2).The DFRE-GR-TR and DFRE-GR-PR-TR diffusers are ideal for use in high ceilings (from 3.5 to 7 m.), preventingstratification and controlling velocity in the occupied area.The necessary supply temperature in heat is 28ºC.- Blades position for horizontal discharge at 25º.- Blades position for vertical discharge at < 90º. It is possible to modify the angle as a function of the vertical throw to reach.- Sound levels and pressure drop for the execution with plenum side entry.

6 DFRE-GR-TRTechnical data. Selection tablesDFRE - GR - TR - HorizontalQ Size 160 200 250 315 355 400(m 3 /h) (l/s) Ak (m2) 0.0082 0.0114 0.0170 0.0287 0.0338 0.0440V k (m/s) 3.4 2.4100 27.8X -8K (m) 1.1 0.9DP t (Pa) 7 5dB(A)

DFRE-GR-TR 7Technical data. Selection graphsThrow graphV Z (m/s)0,30 0,250,20X X (m) (m)3,41 2 3 4Size400355315V Z (m/s)25020016013001100900 700 500Q [m [m 3 /h]3 /h] 600300100SYMBOLSVz Maximum velocity in occupied area, in m/sX Throw in m, for the determined maximum velocityQ Airflow, in m 3 /hInduction rateRatio between temperature differencesSize1,0060504030160 200250315355400q q x /q x /q 0 02010T X /T O0,1001 2 3 4 5X (m)X (m)SYMBOLSX(m) Distance from the diffuserq 0 Air volume in the outlet of the diffuser (primary air)q x Air volume at the distance X from the diffuser4003553152502001600,010,1 0,1 ,0 1,0110,0X (m)

8 DFRE-GR-TRTechnical data. Selection tablesDFRE - GR - TR VerticalQ Size 160 200 250 315 355 400(m 3 /h) (l/s) A k (m 2 ) 0.0183 0.0286 0.0447 0.0710 0.0902 0.1145200 55.6300 83.3400 111.1500 138.9600 166.7700 194.41000 277.81250 347.21500 416.72000 555.62500 694.43000 833.3Y 0,5 (m) 1.4 1.1Y 0,25 (m) 2.1 1.7V k (m/s) 3.0 1.9p t (Pa) 9 4dB(A)

DFRE-GR-TR 9Technical data. Selection graphsMaximum vertical penetration graph16T (K)2 4 6 8 10 12 16201SYMBOLS GRAPH 1Y máx (m)141210ΔT Difference temperatureY Maximal vertical penetration in mQ Airflow, in m 3 /h865,14422 5 8 11 14 17Size400 355 3152502001601900Ys = Y * CBlade angle ( s) 90º 75º 60º 45ºC 1 0,85 0,7 0,55Correction factor (C) for vertical penetration at different bladeangle.170015001300Q (m 3 /h)1100900720700500SYMBOLS GRAPH 2 and 33001002 5 8 11 14 17X(m)q 0q xDistance from the diffuserAir volume in the outlet of the diffuser (primary air)Air volume at the distance X from the diffuserInduction rateRatio between temperature differences150Size1602 0,1030,091400,081300,071201102000,060,051002500,049080315T X /T O0,0370355q xq / x q /q 0 060504000,02403020102 6 10 14 18X (m)0,050,01400355315160 200 2502 6 10 0114 4118 812222626230 03X (m)

10 DFRE-GR-TRProduct codeThe product code shown below is used to define both the diffuser as well as the plenum:DFRE-GR-TRThermo-adjustable blade swirl diffuserDFRE-GR-PR-TRThermo-adjustable blade swirl diffuser integrated in a perforated plateDFRE-GR-Q-TRThermo-adjustable blade swirl diffuser in plate size 594 x 594 mm for false ceilingDFRE-GR-C-PR-TRThermo-adjustable blade swirl diffuser integrated in a circular perforated plateEPlaster ceiling plateØ (125...400)SizeRAL 9010 Painted in RAL 9010RAL ....Special finishes available upon requestPD-RE.PDA-RE.Fixed plenum box with side connection,internally non-insulated, made in galvanised steel sheet,with manual damper accesible from false ceiling.Fixed plenum box with side connection,internally insulated, made in galvanised steel sheet, withmanual damper accesible from false ceiling.Example:DFRE-GR-TR-Ø315 RAL 9010Thermoadjustable blade swirl diffuser, size 315 mm coated in white RAL 9010.

DFRE-GR-TR 11THIS CATALOGUE IS INTELLECTUAL PROPERTY.Reproduction, either partial or total, by any means, including electronic, is prohibited without prior written authorisation fromKOOLAIR, S.A.CIN-DFRE-GR-TR-1012-00

Koolair S.A.Polígono Industrial 2 La Fuensanta28936 Móstoles (Madrid)Tel +34 91 645 00 33Fax +34 91645 69 62www.koolair.com