Catalogs >
TROX >
VD

VD
10Pages

Catalog excerpts

Swirl Diffuser Type VD adjustable, for installation heights м 3.80 m TROX GmbH Heinrich-Trox-Platz D-47504 Neukirchen-Vluyn

Open the catalog to page 1

Contents · Description Description Construction · Dimensions Materials Installation · Weight Nomenclature Technical Data Acoustic Data Quick Selection Aerodynamic Data for Heating Aerodynamic Data VD 425 and 600 Aerodynamic Data VD 775 and 1050 Order Details Description Due to changing thermal loads in a space, air entering the space can either be cooling, isothermal or heating. The type VD swirl diffusers can provide an optimum ventilation of the occupied zone with excellent comfort characteristics. This is achieved by varying the adjustable air pattern control blades between horizontal,...

Open the catalog to page 2

Construction · Dimensions · Materials Construction Depending on installation, all type VD diffusers can be supplied with top or side entry plenum boxes. The aluminium face plate is mounted on the plenum with visible screw fixings through the border. The face plate with control actuator and linkage comes as an integral assembly which is easily demountable from below. The air control blades can be adjusted either manually by using an electric actuator. For use in sports halls, a protection grid can be supplied as an optional extra. Diffuser face made of extruded aluminium sections. Standard...

Open the catalog to page 3

Installation · Weight Installation Swirl diffusers type VD can be installed flush with ceiling as well as freely suspended, due to their versatile characteristics. With a flush installation in open raster ceilings, the same flow conditions result as with a freely suspended situation. TROX-TDC can be used for the temperature-independent actuation of the heating or cooling mode. Protection grid-S A continuous adjustment of the direction of air flow can be made using an electrical actuator; see diffuser arrangement, figure 1. Installation of the face 300 mm below a continuous closed ceiling is...

Open the catalog to page 4

Nomenclature · Technical Data Nomenclature L · V in l/s or in m3/h: Supply air volume per diffuser A in m: Spacing between two diffusers in m: Distance between diffuser face and occupied zone in m/s: Time average air velocity between two diffusers at distance H1 from diffuser face in m: Distance from diffuser centre to wall + H1 in m/s: Time average air velocity at wall in m: Max. penetration of supply air when heating in K: Temperature difference between supply air and room air in K: Temperature difference between core and room at distance L = A/2 + H1 or L to the wall in m2: Effective...

Open the catalog to page 5

Data given: Type VD-V; Size 425 Volume flow per diffuser: V = 300 l/s Required: Sound power level and pressure drop 1 Sound power and pressure drop 2 Sound power and pressure drop VD-H (with side entry spigot) VD-V (with top entry spigot) Correction to LwNC = L„A -4 dB Correction to L^c = L„A -4.5 dB

Open the catalog to page 6

Quick Selection · Aerodynamic Data for Heating Quick Selection Max. supply air penetration vertical discharge Max. supply air penetration 60°- discharge angle Max. supply air penetration 75°- discharge angle Max. supply air penetration 45°- discharge angle

Open the catalog to page 7

Aerodynamic Data VD 425 and VD 600 Resulting sound power level of 53 dB(A) is lower than the required value of 55 dB(A). For the calculation of the noise level in the room, correction for the number of diffusers and the room absorption must also be determined. Example Given: Supply air volume per diffuser Vertical duct connection, size 425 Supply air temperature difference: horizontal, cooling vertical, heating Max. permissible sound power level Spacing between diffusers Distance to wall = A/2 Freely suspended installation with top entry spigot Hence the warm airstream penetrates into the...

Open the catalog to page 8

Aerodynamic Data VD 775 and VD 1050 Diagram 8, Page 8: Max. core velocity at the wall, cooling Diagrams are valid for cooling, horizontal discharge and freely suspended installation. Supply temperature difference: isothermal to – 10 K Operation in warm air mode, see page 7 L = A/2 + H1 L = 1.50 + 4.20 = 5.70 m ƒL = 0.21 m/s ͬt L/ͬt Z = 0.065 ͬt L = – 8 · 0.065 = – 0.52 K Result: On the basis of the given data and complying with the required limiting values the selection of VD-V size 425 is appropriate. Correction: For flush installation in continuous ceiling vH1, vL Max. core velocity at...

Open the catalog to page 9

Order Details Square swirl diffuser with adjustable blades, suitable for swirling horizontal air discharge. By means of the adjustment of the diagonally disposed blade arrays, angled or vertical discharge can also be achieved. It is thus suitable for use at ceiling heights ≥ 3.8 m, particularly in the case of variation in supply air temperature differential Diffuser face made of extruded aluminium profiles, as standard natural anodised finish E6-C-0, alternatively with powder coat colour finish to RAL … . As VD-0 but with plenum box, suspension points and side entry circular spigot. Collar...

Open the catalog to page 10