HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY
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HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY OVERVIEW CHARACTERISTICS APPLICATIONS OVERVIEW : KQ high induction diffusers with variable geometry are a new type of air diffusion equipment. Their unique deflector adjustment system enables them to be used both for cooling and heating. The versatility of this range of components makes them ideal for use in all civil applications that are prone to considerable variations in thermal load and where the throws should be consistent. The variety of dimensions enables the diffusers to be used with a wide range of air flows, throws, and temperature difference between primary air and ambient air. Within this parameters the KQ diffusers ensure the correct air speed in the occupied area, thus maintaining a steady temperature and preventing any irregular or unwanted air currents. Any problems installing the diffusers in a false ceiling are solved by the models fitted with a 595x595 panel. CHARACTERISTICS AND OPERATION : KQ series ceiling diffusers are equipped with a set of pivoting fins, which enable high induction. In this way, both the delivery speed and temperature gradient are quickly reduced to the optimum values for the occupied area. The deflector fins include a variable horizontal part to subdivide the main air flow into radial jets, forced to swirl around the main axis. This system creates a range of individual jets with a swirl motion, which fosters strong turbulence; in turn, this turbulence moves high quantities of ambient air. This procedure obtains high induction and mixes primary air and ambient air thoroughly. The deflectors can be set in different positions in order to vary the direction of the air thus obtaining combined or single air flows, both in a vertical direction (deflectors horizontal) and a horizontal direction (positioned at 45°). However, if all the deflectors are set at 45° in the same direction, the air flow is given a centrifugal swirl motion. Hence, this aeraulic equipment is suitable for all applications which require high induction for heating and cooling. The deflector angle of each model can be changed in one mode in accordance with the model chosen: fin by fin during the installation phase. APPLICATIONS : The diffuser is designed for civil applications with any type of mixing ventilation plants and should be installed at heights between 3,0 and 4,5 meters. The high induction diffuser with variable geometry, which can be changed during operation, can set flows between 50 and 1700 m3/h with variable temperature gradients ranging from +15 °C and -10 °C. SPECIAL VERSIONS The aesthetic requirements in buildings is in constant evolution and require constantly new solutions. As a result of this, the special AS-KQ1 diffuser is offered. The AS-KQ diffuser offers the architectural planning a solution of a clean and essential view obtained by the smooth metal deflectors inside the diffusers. The planning of the new type of deflectors has been carefully made to obtain performances identical to the traditional KQ1 model. the AS-KQ1 model is made with a series of slots in relations to the sizes 400-500-600 each obtained on a carbon steel panel 595x595mm painted white RAL9010. This solution allows the for the simplest installation in modular counter ceilings even with diffuser with small air flows. Just like all other KQ models on 595x595 panel, the AS-KQ1 special model can be paired with the PPS plenum in expanded polyester as alternative to traditional steel sheet plenums. MATERIALS Carbon steel panel painted white RAL9010 Black polypropylene deflectors (KQ series) or black painted steel deflectors. (AS-KQ1). Possibility of producing AISI 304 or AISI 316 stainless steel versions with gloss or satin finish.

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY OVERVIEW CHARACTERISTICS APPLICATIONS FIELD OF USE AND ADJUSTMENT: The high induction diffusers with variable geometry model KQ and AS-KQ, are ideal for installation with counter ceilings in spaces with a ceiling height between 2,7 and 4,5 metres - for example in offices, shops, meeting rooms, corridors, doctor surgeries and similar spaces. They are ideal both for supply and extraction. The two possible deflector positions allows to optimize the diffuser for the intended use. By turning all the deflectors in the same direction the flow of air...

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY Ak in m2 VALUES FOR THE EFFECTIVE AIR PASSAGE SURFACE Ak FOR THE VARIOUS MODELS AVAILABLE FOR KW SERIES DIFFUSERS, MEASURES IN m2

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY Ak in m1 2 j KQ Hight induction diffuser 1 star-shape geometry 8 star-shape geometry - fixed deflectors spiral-shape geometry doubled spiral-shape geometry 40 with nozzles - circular distribution 42 with nozzles - linear distribution -- standard T with 595x595 pane

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY TECHNICAL DIMENTIONS CONSTRUCTIONS DIMENTIONS CONSTRUCTION DIMENSIONS : Picture n° 1 Square and circular standard construction with vertical and horizontal throw The KQ-8 diffuser has the same geometry as the KQ-1. The KQ-1 diffuser is equiped with manually adjustable deflectors. The KQ-8 diffuser is equiped with fixed deplectors.

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY PERFORMANCE KQ1-300 A Distance between the diffusers (m) KQ1 -300 Correction factor for Hr different to 3m Hr Height of the room (m) Data obtained from CFD mathematical model in virtual test chamber operating in isothermal conditions in accordance with the international standard: ISO 5219 1984: Air distribution and air diffusion -Laboratory. Aerodynamic testing and rating of air terminal devices. A(m) distance between thwe diffusers Vo (m/s) speed at the limit of the occupied zone L (m) horizontal distance in metres from the centre of the...

HIGH INDUCTION DIFFUSERS WITH VARIABLE GEOMETRY PERFORMANCE KQ1-300 Data measured in reverberation room in accordance with international standards: ISO 3741 1999: Acoustic - determination of sound power levels of noise sources using sound pressure - Precision methods for reverberation rooms ISO 5135 1997: Acoustic - determination of sound power levels of noise from air-terminal devices ; air terminal units; dampers and valves by measurement in a reverberation room. The data presented does not consider the attenuation given by the area of installation. This attenuation is normally between 6...