Nozzles. About Lindab. Comfort and Design. Product overview / symbols. Theory. Ceiling diffusers. Ceiling diffusers - visible.
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1 Nozzles About Lindab Comfort and Design Product overview / symbols Theory Ceiling diffusers Ceiling diffusers - visible Plenum boxes Wall diffusers Nozzles Ventiduct Grilles Displacement diffusers VAV Constant- / variable flow dampers Air valves Fresh air valves/overflow units Cleanroom diffusers Contents.0 Lindab Ventilation A/S. All forms of copying without written permission are forbidden. is Lindab AB s registered trademark. Lindab s products, systems and product group and product designations are protected by intellectual property rights (IPR).
2 Nozzles Nozzles Product Functions Page GTI DAD LAD GD Calculations Rights to alterations reserved
3 Nozzles Nozzles Nozzles can be used with great advantage in rooms where long air throws are desirable, even at small air flows/volumes. Nozzles are suitable for both heating and cooling. Depending on the chosen nozzle the supplied air pattern can be adapted to the job at hand. Consequently, nozzles can be used to solve very different problems, but excell especially at ventilation of larger rooms with high ceilings. The nozzles can also be used as a help-system to lead heated air from units placed high up, down into the occupied zone. Calculation GD nozzles, painted white, Bauhaus A/S, Glostrup In the back of this chapter is a number of examples of calculations to be used in connection with planning. Lindab can offer specific calculations on a definite installation due to our internal dimensioning-prograe. Please contact Lindab for further information. Example of supply air pattern and direction Right to alterations reserved
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5 Nozzle diffuser GTI Dimensions Installation 0 Ød Description GTI is a flexible supply air nozzle that is suitable for ventilation of large areas. The nozzle can be used for both heated and cooled air and can be adjusted from diffused to concentrated supply air patterns. The supply air pattern can be adjusted by turning the insert in relation to the central line of the nozzle. The nozzle is equipped with Lindab Safe and can be installed directly into a circular duct, fitting, wall or duct side. Flexible nozzle for cooling and heating Adjustable dispersal pattern Simple installation Maintenance The visible parts of the diffuser can be wiped with a damp cloth. Materials and finish Insert: Steel Connection: Galvanised steel Standard finish: Powder-coated Standard colour: RAL 00, 0, gloss 0 The diffuser is available in other colours. Please contact Lindab s sales department for further information. Order code Product GTI aaa A Type GTI Size Version A Example: GTI A Diffused supply air for installation in a circular duct or fitting. Supplied adapted to this form of installation as standard. Installation Ød Concentrated supply air for installation in a circular duct or fitting. The insert is turned 0 degrees. Installation F Ød E E C B Diffused supply air for installation in a wall or duct side. Remove the external pipe. ØA B C Ød E F Ød Weight Size kg , 0 0, 0 0, , Free area for GTI nozzle see pages Nozzle calculations. ØA We reserve the right to make changes without prior notice -0-0
6 Nozzle diffuser GTI Technical data Capacity Volume flow q v [l/s] and [m /h], total pressure Δp t [Pa], throw l 0. and sound level L WA [db(a)] can be seen in the diagrams. Throw l 0. Throw l 0. can be seen in the diagrams for isothermal air at a terminal velocity of 0. m/s Resulting sound effect level The sound effect level from the nozzles must be added logarithmically to the sound effect level from the flow noise in the duct. See sample calculation, pages Nozzle calculations. Frequency-related sound effect level The sound effect level in the frequency band is defined as L wok = L WA + K ok. K ok values can be seen in the table below. Table - diffused supply air Size Centre frequency Hz 0 00 K K K K Table - concentrated supply air Size Centre frequency Hz 0 00 K K K K Diffuse supply l0. [m] GTI-0& q V [l/s] q V [ m /h] p t [Pa] 0 GTI-0& Concentrated supply l0. [m] 0 L W A db(a) q V [l/s] q V [ m /h] Air jet width b h Diffuse Concentrated bh bh b h = 0, l 0, b h = 0, l 0, We reserve the right to make changes without prior notice -0-0
7 DAD Dimensions DAD-0 With flange for mounting on a wall or duct side. Ø ( ) 0 Ø F Ø Nom 0 0 Ø A Ø B Ø E Description DAD is an adjustable supply air nozzle suitable for ventilation of large areas where long throws are required. The nozzle can be freely rotated 0 degrees in any direction in relation to the central line of the nozzle. The nozzle can be used for both heated and cooled air. The nozzle can be installed directly into a circular duct, fitting, wall or duct side. Supplied with screw holes through flange (DAD-0). ØF = min. hole dimension Ø nom Size D ØA C ØB C D ØE ØF Weight kg Flexible adjustable nozzle Long throws Simple installation Maintenance The visible parts of the diffuser can be wiped with a damp cloth. Materials and finish Material: Aluminium Standard finish: Powder-coated Standard colour: RAL 0, gloss 0 DAD- Installation in circular duct. Ø B Ø Nom 0 0 Ø A The diffuser is available in other colours. Please contact Lindab s sales department for further information. D C Order code Product DAD a bbb Type with flange 0 for circular ducts Size ØNom includes male connection measure Ø nom Size ØA ØB C D Weight kg Free area for DAD nozzle see section Nozzle calculations. We reserve the right to make changes without prior notice
8 DAD Technical data Capacity Volume flow q v [l/s] and [m /h], total pressure Δp t [Pa], throw l 0. and sound level L WA [db(a)] can be seen in the diagrams. Supply air l 0. [m] DAD Throw l 0. Throw l 0. can be seen in the diagrams for isothermal air at a terminal velocity of 0. m/s Resulting sound effect level The sound effect level from the nozzles must be added logarithmically to the sound effect level from the flow noise in the duct. See sample calculation, section Nozzle calculations. Frequency-related sound effect level The sound effect level in the frequency band is defined as L wok = L WA + K ok. K ok values can be seen in the table below. Table Centre frequency Hz Size 0 00 K K K K l 0. [m] q V [l/s] q V [m /h] We reserve the right to make changes without prior notice
9 LAD Dimensions E ØD (MF) ØA Description LAD is an supply air nozzle suitable for ventilation of large areas where long throws are required. The nozzle can be used for both heated and cooled air. LAD has a standard MF measure and can be installed directly on a male spigot in the desired direction. Directional airflow Long throws Simple installation Maintenance The visible parts of the diffuser can be wiped with a damp cloth. B Size ØA B ØD E Free area A[m ] Weight kg Order code Product LAD a bbb Type Colour: Untreated 0 Other colour Size Materials and finish Material: Standard finish: Aluminium Untreated or powder-coated The diffuser is available in other colours. Please contact Lindab s sales department for further information. We reserve the right to make changes without prior notice
10 LAD Technical data Capacity Volume flow q v [l/s] and [m /h], total pressure Δp t [Pa], throw l 0. and sound level L WA [db(a)] can be seen in the diagrams. Throw l 0. Throw l 0. can be seen in the diagrams for isothermal air at a terminal velocity of 0. m/s Resulting sound effect level The sound effect level from the nozzles must be added logarithmically to the sound effect level from the flow noise in the duct. See sample calculation, section Nozzle calculations. Frequency-related sound effect level The sound effect level in the frequency band is defined as L wok = L WA + K ok. K ok values can be seen in the table below. Table Centre frequency Hz Size 0 00 K K K K Supply air l0. [m] LAD l 0. [m] q V [l/s] q V [m /h] We reserve the right to make changes without prior notice
11 GD Dimensions 0 Hole min. Ø0 Ø 0 Ø Description GD is a rubber supply air nozzle suitable for ventilation of large areas where long throws are required. The nozzle can be adjusted for directional airflow, and can be installed directly into circular ducts, ( min. Ø0 ), or duct walls, ( min. height = 0 ). The nozzle can be used for both heated and cooled air. Directional airflow Long throws Simple installation Maintenance The visible parts of the nozzle can be wiped with a damp cloth. Free area: 0.00 m Straight groove: For rectangular duct. Oblique groove: For circular duct. Mounted in duct Ø Ø > 0 H H > 0 Order code Product Type GD Materials and finish Nozzle: EPDM rubber, hardness 0, black We reserve the right to make changes without prior notice
12 GD Technical data Capacity Volume flow q v [l/s] and [m /h], total pressure Δp t [Pa], throw l 0. and sound level L WA [db(a)] can be seen in the diagrams. Supply air Throw l 0. Throw l 0. can be seen in the diagrams for isothermal air at a terminal velocity of 0. m/s. Resulting sound effect level The sound effect level from the nozzles must be added logarithmically to the sound effect level from the flow noise in the duct. See sample calculation, section Nozzle calculations. Frequency-related sound effect level The sound effect level in the frequency band is defined as L wok = L WA + K ok. K ok values can be seen in the table below. Table Centre frequency Hz Size 0 00 K K K K GD p t [Pa] GD L WA db(a) q V [l/s] q V [m /h] We reserve the right to make changes without prior notice
13 Calculation Resulting sound effect level To calculate the resulting sound effect level from the nozzles, add the sound effect level from the nozzles (L WA nozzle) and the sound effect level from the flow noise in the duct (L WA duct) logarithmically. Diagram, sound effect duct, L WA duct. Diagram, addition of sound levels. Difference to be added to the highest db value (db) Difference between the db values (db) Sample calculation: LAD-00 q = 0 l/s ΔP t nozzle 0 Pa Duct size: In order to achieve a sensible distribution of the air out to the nozzles without using a damper, it is recoended that the pressure loss in the nozzle be times higher than the dynamic pressure in the duct system. Selected duct dimension Ø 00 Number of nozzles at joint Volume of air in the duct x 0 = 00 l/s L WA duct (can be seen in diagram ) db(a) L WA nozzle (can be seen in product diagram) db(a) Difference between db values db(a) Value to be added to the highest db value (diagram ) db(a) Resulting sound effect level: + = db(a) 0 0 L W v Duct Duct L W v Nozzle Nozzle Extension of throw for two nozzles, positioned side by side: If two nozzles are positioned next to each other, the air jets will be amplified, thereby extending the throw. To calculate this, use the diagram below, in which the distance between the nozzles is designated D. The calculation factor K must be multiplied by the throw l 0. The throw is not extended further with more nozzles. Sample calculation: LAD-. Distance D =. metres. Volume of air: q = l/s Diagram throw under selected nozzle Specified throw: l 0. = m D [m] / l 0. [m]. / = 0. K calculation factor Can be seen in the diagram K =. Resulting throw: K x l0. =. x m =. m We reserve the right to make changes without prior notice
14 Calculation Supply air with cooled air α L Supply air with heated air X H Y Sample calculation: Heated air LAD-00: q = 00 m /h Fan Final velocity Δt = -K α = 0 v x = 0, m/s q X = K = 0,00 00 = m 0, v x X Y = K Δt = =, m q 00 H = X sin α = 0, =, m L = X cos α = 0, =, m α H X Y L X = L cos α = H = L tan α Terminal velocity V X : H sin α v x = K q X Deflection Y: Y = K X q Δt Sample calculation: Cooled air LAD-00: q = 00 m /h Fan Final velocity Δt = -K α = 0 v x = 0, m/s q v x = K X q X = K = 0,00 00 = m v x 0, X Y = K Δt = =, m q 00 H = X sin α = 0, =, m L = X cos α = 0, =, m 00 We reserve the right to make changes without prior notice
15 Calculation Calculation factors: Free area K K K Size A m m /h l/s m /h l/s m /h l/s LAD DAD GD GTI Vertical supply air with heated air Y m Sample calculation: Y m = K x q Δt LAD-0 q = 00 m /h Δt = K (m) The distance to the turning point of the air jet: q Y m = K x (m) Δt Y m = 0, x 00 (m) Y m =, m We reserve the right to make changes without prior notice 0
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