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Stand
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Swirl Diffusers - 17 Pages
Air velocity at a distance 75 mm from the wall
vL = 0.21 m/s
L = X+H1 = 2.90 m
L = A/2 + H1 = 2.90 m
AtL/Atz = 0.019
At |_ = 0.019 x (-8) =-0.15 K
Diagrams 13 to 16:
Permitted volume flow ranges
see Selection Table Page 6.
Diagrams 13 to 16 are applicable to configurations
with discharge nozzle. The following corrections should
be used for configurations without discharge nozzle:
At |_/At z | VH1 | |
xO.76 | x 1.37 | x 1.31 |
13 Diffuser arrangement: more than one row
if B = 2.80 m
H, = 0.9 1.2 1.6 2 m
0.7 1
1.5 2
4 5 6m
Spacing A-"
14 Diffuser arrangement: single or more than one row
if B a 4.00 m
H, = 0.9 1.2 1.6 2 m
E
.E <a"
i/ | s (m3/h 5 | ||||||||
Y | |||||||||
A | 0 | X | |||||||
\ | |||||||||
3 | 0 | ||||||||
/ | |||||||||
2 | 0 | 1 % | |||||||
i | |||||||||
0.7 1 1.5 2 3 4 5 6m
Spacing A-■ ■
15 Air velocity at the wall and temperature quotient
A = 0.5 1 2 3m
0.13
0.7 1 1.5 2 3
Distance L -
16 Square diffuser
H, = 0.9 1.2 1.6 2.0m
5 7 10m
0.7 1.0 1.5 2.0 3.0 4.0 6.0m
Spacing A or B -
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Nomenclature · Quick Selection · Spectral Data·V·VA, BXH1vH1Nomenclaturein l/s:in m3/h:in m:in m:in m:in m/s:Lin m:vLͬ tZin m/s:in... -
P. 7
Example Data given: Type RFD-R-D-US/125 Volume flow per diffuser V = 24 l/s Required: Octave band sound power level of regenerated noise... -
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Acoustic Data Correction to Diagram 3: Damper angleBlade angle0°45°90°Ap,x 1x 1.2x2.4 + 1+ 3 + 1+ 3 Correction... -
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Acoustic Data Correction to Diagram 7: Damper angle Correction to Diagram 9: Damper angle Blade angle 0° ... -
P. 10
Acoustic DataExampleData given:·Volume flow per diffuserV = 30 l/sSupply air temperature differential ͬ t Z = – 8 KSound pressure level... -
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Aerodynamic Data RFD 160 Diagrams 17 to 20: Permitted volume flow ranges see Selection Table Page 6. Diagrams 17 to 20 are applicable to... -
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Diagrams 21 to 24: Permitted volume flow ranges see Selection Table Page 6. Diagrams 21 to 24 are applicable to configurations with discharge... -
P. 14
Diagrams 25 to 28: Permitted volume flow ranges see Selection Table Page 6. Diagrams 25 to 28 are applicable to configurations with discharge... -
P. 15
Aerodynamic Data RFD 315 Diagrams 29 to 32: Permitted volume flow ranges see Selection Table Page 6. Diagrams 29 to 32 are applicable to... -
P. 16
Diagrams 33 to 36: Permitted volume flow ranges see Selection Table Page 6. Diagrams 33 to 36 are applicable to configurations with discharge... -
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