LOUVRES Nexus Series ® Single, Two-stage & Drainable Ventilation Louvres Distinctive Features: • Ideal for applications where there is greater weather exposure and air flow needs to be maintained at optimum levels. • Suitable for large industrial louvre banks • Incorporated Drainable Louvre System Attention to Detail: • 50% free open area • Maximum blade span: 1500mm • 83% free open area operable blade - fully open Tested to AS/NZS 4740:2000, the Nexus Series® louvre is available in Standard, drainable and 2 Stage louvre options achieving high performance ratings for both Aerodynamics and Rain defence, making it a good all-round industry standard louvre with an additional weather lip that makes it an ideal screening and ventilation louvre to mitigate the cascade effect. ADDED WEATHER PROTECTION visit louvreclad.com phone 1300 165 678 Performance tested to AS/NZS 4740:2000 Rain Defence: Standard: Class C | Two stage: Class A | Drainable: Class C Aerodynamics: Standard: Class 3 | Two stage: Class 4 | Drainable: Class 2 Note: Full CFD report available on request.
Transcript
LOUVRES
Nexus Series® Single, Two-stage & Drainable Ventilation Louvres
Distinctive Features:• Ideal for applications where there is greater weather exposure and
air flow needs to be maintained at optimum levels.
• Suitable for large industrial louvre banks
• Incorporated Drainable Louvre System
Attention to Detail:• 50% free open area
• Maximum blade span: 1500mm
• 83% free open area operable blade - fully open
Tested to AS/NZS 4740:2000, the Nexus Series® louvre is available in Standard, drainable and 2 Stage louvre options achieving high performance ratings for both Aerodynamics and Rain defence, making it a good all-round industry standard louvre with an additional weather lip that makes it an ideal screening and ventilation louvre to mitigate the cascade effect.
ADDED WEATHER PROTECTION
visit louvreclad.com phone 1300 165 678
Performance tested to AS/NZS 4740:2000 Rain Defence:
Standard: Class C | Two stage: Class A | Drainable: Class C
Aerodynamics: Standard: Class 3 | Two stage: Class 4 | Drainable: Class 2
Note: Full CFD report available on request.
LOUVRES
Nexus Series®
PERFORMANCE DATA - SINGLE LOUVRE
Nexus Series® Standard achieves a Class C3 performance rating in accordance with AS4740:2000 making it well suited for screening applications where industry standard louvres are required. A key feature of this louvre it the additional weather lip which works to mitigate the cascade effect and ensure maximum rain defence.
This highly versatile louvre system can be custom designed to meet multiple performance requirements. Nexus Series® Standard can be utilized where maximum aerodynamics is required with the benefit of adding a second stage where extra rain defence is needed while maintaining the continuous external architectural aesthetic. Nexus Series can be fabricated into panels or installed as a continuous fixed louvre making it well suited to commercial and industrial applications including plant room screening, air intake and exhaust, penthouse louvres and louvre doors.
Rain Defence tested to AS/NZS 4740:2000Rain penetration analysis is tested to AS/NZS 4740:2000 and was conducted at a constant rain flow rate with ventilation rates ranging from 0.5m3/s to 3.5 m3/s. The results concluded that the ventilator has low rain defence performance and is summarized in Table 2.
The Nexus Series® Standard louvre’s average rain penetration effectiveness at core velocities from 0 to 3.5m/s was 80% effective achieving a Class C rating.
Aerodynamics tested to AS/NZS 4740:2000This aerodynamics and discharge coefficient analysis was conducted to AS4740:2000 with the ventilation rate ranging from 0.4m/s to 3.4m/s. Table 2 summarizes the ventilator’s aerodynamic performance at different face velocities.
The Nexus Series® Standard louvre performance resulted in an average discharge coefficient of 0.473 and the effective aerodynamic area was 0.25 with a Class 3 performance rating.
Rain penetration
Velocity vectors
Page | 5
Figure 4: Static pressure drop at different velocities.
The pressure drop across the ventilator was measured at 100mm from the upstream and downstream of the ventilator. It can be seen in Figure 4 that the pressure drop increased with air velocity.
Figure 5: Velocity vector at 2.9m/s face velocity.
Figure 5 illustrates the velocity vector across the ventilator at the face velocity of 2.9m/s. The throat velocity is relatively uniform between each blade. The pressure different across each bladed was relative uniform as shown in Figure 6.
y = 7.6924x2 + 0.5173x + 2.1406
y = 4.9547x2 + 0.4152x + 2.1406
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
90.0
100.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Stat
ic pr
esur
e dr
op [P
a]
Air velocity [m/s]
Pressure drop at different velocities
Face velocity (m/s)
Core velocity (m/s)
Page | 6
Figure 6: Rain penetration performance at each core velocity
Figure 6 summarizes the rain penetration performance of the ventilator at the core velocities from 0m/s to 3.5m/s. The rain penetration rate remains above 80% up till the core velocity of 2.0m/s. When the ventilation rate increased to 3.5m/s the penetration rate raised to 20.63 L/hr∙m2 and this was due to more rain droplets were able to travel pass the ventilator at higher flow rates.
Figure 7: Overview of velocity vectors at 1.0m/s core velocity.
Figure 7 shows the velocity vectors across the computational domain. The velocity at the downstream of the ventilator was relatively low at high inlet velocity. Figure 8 illustrates the static pressure distribution across the ventilator and the pressure loss was recorded at -4.9Pa at 1.0m/s core velocity.
84% 84%82% 81% 80% 78%
77%
72%
0.00
5.00
10.00
15.00
20.00
25.00
65%
70%
75%
80%
85%
90%
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Pene
trat
ion
rate
[L/h
r•m
²]
Effe
ctiv
enes
s [%
]
Core velocity [m/s]
Rain penetration performance
Effectiveness [%] Penetration rate [L/hr•m²]
visit louvreclad.com phone 1300 165 678
LOUVRES
Nexus Series®
PERFORMANCE DATA - DRAINABLE LOUVRE
Nexus Series® Drainable louvre has the benefit of the extra weather lip to mitigate the cascade effect alongside an additional weather channel that provides rain catchment and water drainage for each blade individually to be discharged at the bottom of the louvre through the mullions. This feature provides excellent drainage to mitigate the cascade effect and ensures maximum rain defence.
Rain Defence tested to AS/NZS 4740:2000Rain penetration analysis is tested to AS/NZS 4740:2000 and was conducted at a constant rain flow rate with ventilation rates ranging from 0.5m3/s to 3.5 m3/s. The results concluded that the ventilator has low rain defence performance and is summarized in Table 2.
The Nexus Series® Drainable louvre’s average rain penetration effectiveness at core velocities from 0 to 3.5m/s was 80% effective achieving a Class C rating.
Aerodynamics tested to AS/NZS 4740:2000This aerodynamics and discharge coefficient analysis was conducted to AS4740:2000 with the ventilation rate ranging from 0.4m/s to 3.4m/s. Table 2 summarizes the ventilator’s aerodynamic performance at different face velocities.
The Nexus Series® Drainable louvre performance resulted in an average discharge coefficient of 0.606 with an Effective Aerodynamic Area of 0.50 while achieving a Class 2 performance rating.
Rain penetration
Velocity vectors
Page | 5
Figure 4: Static pressure drop at different velocities.
The pressure drop across the ventilator was measured at 100mm from the upstream and downstream of the ventilator. It can be seen in Figure 4 that the pressure drop increased with air velocity.
Figure 5: Velocity vector at 2.9m/s face velocity.
Figure 5 illustrates the velocity vector across the ventilator at the face velocity of 2.9m/s. The throat velocity is relatively uniform between each blade. Figure 6 shows the pressure different at the upstream and downstream of the ventilator.
y = 15.391x2 + 0.4753x + 0.099
y = 9.9134x2 + 0.3814x + 0.099
0.020.040.060.080.0
100.0120.0140.0160.0180.0200.0
0.0 1.0 2.0 3.0 4.0 5.0
Stat
ic pr
essu
re d
rop
drop
[Pa]
Air velocity [m/s]
Pressure drop across different velocities
Face velocity (m/s)
Core velocity (m/s)
Page | 5
Figure 5: Static pressure loss across the ventilator
The pressure loss across the ventilator was measured at 100mm from the upstream and downstream of the ventilator. It can be seen in Figure 5 that the pressure drop increased with suction air velocity while inlet fan velocity maintained at a constant speed of 13m/s.
Figure 6: Rain penetration performance at each core velocity
-15.0
-10.0
-5.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0St
atic
pres
sure
[Pa]
Core velocity [m/s]
Pressure loss across ventilator
86% 84% 84% 83% 80% 78% 75% 72%
0.00
5.00
10.00
15.00
20.00
25.00
0%10%20%30%40%50%60%70%80%90%
100%
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Pene
trat
ion
rate
[L/h
r•m
²]
Effe
ctiv
enes
s [%
]
Core velocity [m/s]
Rain penetration performance
Effectiveness [%] Penetration rate [L/hr•m²]
visit louvreclad.com phone 1300 165 678
LOUVRES
Nexus Series®
PERFORMANCE DATA - TWO-STAGE LOUVRE
Nexus Series® Two-stage louvre Tested to AS/NZS 4740:2000 this louvre provides Class A4 performance. Designed to provide maximum resistance against wind driven rain, the Nexus Series® two-stage louvre is manufactured to withstand cyclone conditions. An excellent selection for commercial and industrial applications where maximum rain defence is crucial to the design.
Rain Defence tested to AS/NZS 4740:2000Rain penetration analysis is tested to AS/NZS 4740:2000 and was conducted at a constant rain flow rate with ventilation rates ranging from 0.5m3/s to 3.5 m3/s. The results concluded that the ventilator has low rain defence performance and is summarized in Table 2.
The Nexus Series® Two Stage louvre’s average rain penetration effectiveness at core velocities from 0 to 3.5m/s was 99% effective achieving a Class A rating.
Aerodynamics tested to AS/NZS 4740:2000This aerodynamics and discharge coefficient analysis was conducted to AS/NZS 4740:2000 with the ventilation rate ranging from 0.4m/s to 3.4m/s. Table 2 summarizes the ventilator’s aerodynamic performance at different face velocities.
The Nexus Series® Two Stage louvre performance resulted in an average discharge coefficient of 0.238 while achieving a Class 4 performance rating.
Rain penetration
Velocity vectors
Page | 5
Figure 4: Static pressure drop at different velocities.
The pressure drop across the ventilator was measured at 100mm from the upstream and downstream of the ventilator. It can be seen in Figure 4 that the pressure drop increased with the air velocity.
Figure 5: Velocity vector at 2.9m/s face velocity.
y = 35.838x2 + 1.9136x + 1.4771
y = 24.792x2 + 1.5916x + 1.4771
0
50
100
150
200
250
300
350
400
450
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Stat
ic pr
essu
re d
rop
[Pa]
Air velocity [m/s]
Pressure drop across different velocities
Face velocity (m/s)
Core velocity (m/s)
Page | 9
Figure 17: Nexus 2 stage pressure drop
Figure 18: Nexus 2 stage rain pen.
y = 35.838x2 + 1.9136x + 1.4771
y = 24.792x2 + 1.5916x + 1.4771
0
50
100
150
200
250
300
350
400
450
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Stat
ic p
ress
ure
drop
[Pa]
Air velocity [m/s]
Pressure drop across different velocities
Face velocity (m/s)
Core velocity (m/s)
100.0% 100.0% 100.0% 100.0% 100.0% 100.0%99.5%
95.7%
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
93.0%
94.0%
95.0%
96.0%
97.0%
98.0%
99.0%
100.0%
101.0%
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Pene
trat
ion
rate
[L/h
r•m
²]
Effe
ctiv
enes
s [%
]
Core velocity [m/s]
Rain penetration performance
Effectiveness [%] Penetration rate [L/hr•m²]
visit louvreclad.com phone 1300 165 678
PROFILES
LOUVRES
DRAFT SPECIFICATION
Louvres will be Louvreclad Nexus Series® standard louvre.
Performance tested to AS/NZS 4740:2000 the Nexus Series Standard Louvre achieves a Class C for rain defence and Class 3 for Aerodynamics at velocities from 0.5-1.4m/s and Class 2 up to 3.5m/s with 50% free open area.
Louvres will be Louvreclad Nexus Series® Drainable Louvre.
Performance tested to AS/NZS 4740:2000 the Nexus Series Drainable Louvre achieves a Class C for rain defence and Class 2 for Aerodynamics at velocities up to 3.5m/s with 50% free open area.
Louvres will be Louvreclad Nexus Series® Two Stage Louvre.
Performance tested to AS/NZS 4740:2000 the Nexus Series Two Stage achieves a Class A for rain defence and Class 4 for Aerodynamics at velocities from 0.5-3.5m/s with 50% free open area.
Base Material & FinishLouvres will be manufactured in (powder coated/anodised) aluminium finish in (state colour)
AccessoriesLouvre’s will be fitted with (nominate options/accessories from the selection).
Operation Method (if applicable)The operation method will be (Electric Motor/Manual winder/other - choose method)
Control SystemAutomated Control will be by (specify sensors and control system) (if required)
Installation and MountingInstallation and mounting details will be designed in accordance with proprietary systems and recommendations as designed and manufactured by Louvreclad Pty. Ltd. Phone: 1300 165 678 Email: [email protected]
Base Material Options• Extruded aluminium
Finishes AvailableChoose from the following range of finishes:• complete powder coated range• complete anodised rangeSpecialised coatings are also available on request.
AccessoriesBird/Vermin MeshSelect from the following:• galvanised• galvanised powder coated• stainless steel
• plastic• perforated metal
Insect MeshSelect from the following:• aluminium• fibreglass
• stainless steel• perforated metal
Other Louvre Accessories• Rain sensors• Security screens and bars• Volume control dampers
• Fire and smoke dampers• Dust filters• 2nd stage louvres (fixed only)
Operating OptionsIf specifying operable louvres please nominate the operating system from the following:• remote winder control• electric actuator
Nexus Series®
102
125
125
62.5
203
102
125
Nexus Series® standard louvre
Nexus Series® two-stage louvre
Nexus Series® drainable louvre
visit louvreclad.com phone 1300 165 678
WOULD YOU LIKE TO KNOW MORE? If you have any questions about this product, or if you would like to speak to a member of our expert team about how we can tailor a solution for you, call: 1300 165 678 or visit: louvreclad.com
![ISSN [print] 2722 3469 | ISSN [Online] 2722 4740 ANALISIS ...](https://static.documents.pub/doc/80x56/618165728b60df3373637e93/issn-print-2722-3469-issn-online-2722-4740-analisis-.jpg)
![ISSN [print] 2722 3469 | ISSN [Online] 2722 4740 ...](https://static.documents.pub/doc/80x56/61592ef524af0050192d17e4/issn-print-2722-3469-issn-online-2722-4740-.jpg)
