lindab | we simplify construction Nozzle diffuser GTI Technical data Capacity Volume flow q v [l/s] and [m 3 /h], total pressure Δ p t [Pa], throw l 0.3 [m] and sound power level L WA [dB(A)] can be seen in the diagrams. Throw l 0.3 Throw l 0.3 can be seen in the diagrams for isothermal air at a terminal velocity of 0.3 m/s. Resulting sound effect level The sound effect level from the nozzles must be added loga- rithmically 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 WA + K ok K ok values are given in charts beneath the diagrams on the following pages. Table 1 - diffused supply air Size 200 250 315 400 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 15 0 -5 -6 -2 -10 -22 -32 13 -3 -6 -6 -1 -14 -14 -33 16 -1 -6 -2 -3 -15 -26 -35 14 -1 -3 0 -5 -16 -27 -32 Table 2 - concentrated supply air Size 200 250 315 400 Centre frequency Hz 63 125 250 500 1K 2K 4K 8K 14 0 -3 -4 -2 -13 -27 -37 16 -3 -6 -4 -2 -16 -25 -28 18 -1 -5 -2 -3 -16 -29 -40 15 -4 -6 -4 -2 -21 -34 -38 Air jet width b h Diffuse b h b h = 0,5 × l 0,3 b h Concentrated b h = 0,2 × l 0,3 Diffuse supply l 0.3 [m] 15 G TI-0&2 10 8 7 6 5 4 200 250 315 400 3 2 30 100 40 50 60 70 80 100 150 200 300 150 200 500 700 l 0.3 [m] 300 1000 q V [l/ s ] 400 q V [m 3 /h] 1500 ∆p t [Pa] G TI-0&2 150 200 250 315 400 100 60 70 55 50 50 45 30 40 20 35 15 30 10 7 40 50 60 70 80 100 25 20 150 200 300 150 200 300 400 500 700 1000 L WA dB(A) q V [l/ s ] 400 500 700 1500 q V [m 3 /h] 2000 2500 Concentrated supply L ;M= '4) L ;M= Q 6 ;LS= Q 6 ;M H= ¨S T ;0A= '4) , 7! D"! Q 6 ;LS= Q 6 ;M H= 2 Lindab reserves the right to make changes without prior notice 2021-02-09
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