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Displacement diffuser QAL - 16 Pages

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Catalogue excerpts

Displacement flow diffuser QAL model Description, Areas of application and Benefits . . . . . . . . . . . . . . . . . . . . . . . QAL 1 Configuration and Method of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . QAL 2 QAL - L Ranges of application, Size and Aerodynamic data . . . . . . . . . . . . . . . . . . . QAL - L 4 Rating diagram and Example . . . .. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . QAL - L 5 QAL - R Ranges of application, Size and Aerodynamic data . . . . . . . . . . . . . . . . . . . QAL - R 6 Rating diagram and Example . . . .. . ....

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Displacement flow diffuser Description, Areas of application et Benefits Displacement flow diffuser QAL Displacement flow diffusers QAL are used both in commercial and industrial areas. Depending on the specific structural requirements, the diffuser is available in cylindrical, semi-circle, quarter-circle or linear design. The diffuser consists of a front plate of coated steel, ceiling and floor panels as well as a distribution mechanism. Blowing takes place through a spigot in the upper cover plate. Depending on the ceiling height and the degree of activity among the occupants, diffuser QAL can...

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Displacement flow diffuser Configuration and Method of operation Configuration Displacement flow diffuser QAL consists of a cylindrical (full, half or quarter circle) or flat removable front plate of perforated steel (1) and an interior distribution mechanism (2). The bottom plate (3) has adjustment screws for making any alignments. Installation Displacement flow diffusers are for use in cooling applications only. Conventional versions foresee installation in the floor of the room to be ventilated. In order to maintain comfort requirements, the active height of the QAL diffuser should not exceed...

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Training room, Baden-Baden, Germany Sous réserve de modifications techniques. Version 30 / 01 / 2012

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Displacement flow diffuser Ranges of application, Size and Aerodynamic data QAL - L (wall installation) Ranges of application The 3 air volume flow ranges given for the individual designs, sizes and heights have been determined on the basis of the discharge velocities. These discharge velocities relate to the displacement flow diffuser’s overall surface (front panel surface). Aerodynamic data . Vnom. ∆p[Pa] Vnom. LWA[dB(A)] Nominal size Vmin : Air volume flow for a discharge velocity of 0,15 m/s Vmax : Air volume flow for a discharge velocity of 0,25 m/s Vnom. : Air volume flow for a discharge...

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Displacement flow diffuser Rating Diagram Example QAL - L Tem Solution From the “Ranges of application” diagram a DN results of 800. 3 From the “Rating diagram“, with application of correction table, you find : x = 3,4 m (pour vx x 0,94) 6 ∆Tx / ∆T0 = 0,25 x 0,86 = 0,22 7 ∆pt = 5 x 1,25 = 6,25 Pa 9 LWA = 21 + 3 = 24 dB (A) 8 horizontal distance x from diffuser [m] Specifications Overall height : Airflow : Temperature difference : max. air velocity at floor : Subject to technical changes. Version 13 / 09 / 2012

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Displacement flow diffuser Ranges of application, Size and Aerodynamic data QAL - R (floor installation - 360°) Ranges of application The 3 air volume flow ranges given for the individual designs, sizes and heights have been determined on the basis of the discharge velocities. These discharge velocities relate to the displacement flow diffuser’s overall surface (front panel surface). Aerodynamic data . Vnom. ∆p[Pa] Vnom. LWA[dB(A)] Nominal size Vmin : Air volume flow for a discharge velocity of 0,15 m/s Vmax : Air volume flow for a discharge velocity of 0,25 m/s Vnom. : Air volume flow for a discharge...

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Displacement flow diffuser Rating Diagram Example QAL - R Example QAL - R Solution From the “Ranges of application” diagram a height results of 1000 mm. 3 From the “Rating diagram“, with application of correction table, you find : x = 2,3 m (pour vx x 1) 6 ∆Tx / ∆T0 = 0,56 x 1 = 0,56 7 ∆pt = 17 x 1 = 17 Pa 9 LWA = 31 + 0 = 31 dB 8 Required Overall height : x : ∆Tx / ∆T0 : ∆pt : LWA Horizontal distance x from diffuser [m] Specification DN : Air flow : Temperature difference : max. air velocity at floor : Subject to technical changes. Version 13 / 09 / 2012 Correction table

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Displacement flow diffuser Ranges of application, Size and Aerodynamic data QAL - H (semi-circular - 180°- for wall installation) DN Ranges of application The 3 air volume flow ranges given for the individual designs, sizes and heights have been determined on the basis of the discharge velocities. These discharge velocities relate to the displacement flow diffuser’s overall surface (front panel surface). Aerodynamic data . Vnom. ∆p[Pa] Vnom. LWA[dB(A)] Nominal size Vmin : Air volume flow for a discharge velocity of 0,15 m/s Vmax : Air volume flow for a discharge velocity of 0,25 m/s Vnom. : Air...

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Displacement flow diffuser Rating Diagram Example QAL - H Solution From the “Ranges of application” diagram a DN results is 800. 3 From the “Rating diagram“, with application of correction table, you find : vx = 0,21 x 1 = 0,21 m/s 4 ∆Tx / ∆T0 = 0,89 x 1 = 0,89 7 ∆pt = 11 x 1 = 11 Pa 9 LWA = 24 + 0 = 24 dB 8 Horizontal distance x from diffuser [m] Specifications Height: Air flow : Temperature difference: Distance from diffuser : Correction table Subject to technical changes. Version 13 / 09 / 2012

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Klima Displacement flow diffuser Ranges of application, Size and Aerodynamic data QAL - V (Quarter-circular for corner installation) The 3 air volume flow ranges given for the individual designs, sizes and heights have been discharge velocities. These discharge velocities relate to the displacement flow diffuser's overall surface (front panel surface). Aerodynamic data Vmin: Air volume flow for a discharge velocity of 0,15 m/s Vmax: Air volume flow for a discharge velocity of 0,25 m/s Vnom.: Air volume flow for a discharge velocity of 0,2 m/s; L: Horizontal distance from diffuser for AT0 = -2°C. Subject...

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