Embed Size (px)
Citation preview
[email protected] | +44 (0) 1787 475651 | www.premaberg.com
Weather Louvres
Premaberg High Efficiency Weather Louvres are designed to offer good protection for forced and naturally ventilated areas. They are suitable for operation in weather conditions normally expected on offshore oil and gas platforms and in other applications where they have to handle sea generated spray, fog and frequent heavy rainfall.
PREMABERG HIGH EFFICIENCY WEATHER LOUVRES PROVIDE:
• Low Pressure Drop and K Factor Characteristics
• Vertical Louvre Blades Multiple change of flow direction and catchment pockets give high moisture separation efficiency; 100% of droplets larger than 26 microns diameter.
• Good Water Carrying Capacity Detrimental carry-over avoided for a wide range of water loadings.
• Effective Water Drainage Arrangements
• Good Airflow Distribution Downstream of the Louvre Minimal changes in performance when wind directions are not perpendicular to louvre face.
• Engineering Features Robust modular construction. Low weight with high structural strength. Simple fixing and penetration arrangements. Quality manufacture.
LOUVRES FOR NATURAL VENTILATION:
The Premaberg P2XLP louvre profile was specificallydeveloped for use in naturally ventilated offshoreplatform modules where the louvre operatingcharacteristics are important for effective naturalventilation.
THE KEY ATTRIBUTES OF THE P2XLP LOUVRE ARE:• Effective water removal.
• Exceptionally low ‘K’ factor. In isolation this is 4.25, averaged over both flow directions, increasing to approximately 6.0 by the effect of framing.
• Minimal resistance at low velocities and near uninterrupted flow.
• Reverse flow characteristics similar to those in the primary flow direction, providing minimum resistance to outflowing air on downwind side.
• Increasing pressure drop at high velocities, reducing effect of high wind speeds, but maintaining adequate air flows.
• Vertical blades to achieve maximum effective distribution within the ventilated area.
APPLICATIONSPremaberg High Efficiency Weather Louvres have been supplied for a wide range of applications where good water removal from air streams is required. These applications vary from many hundreds of square metres of louvre panels used for natural ventilation to small single panels used to protect HVAC systems. Premaberg Louvres are used extensively on offshore platforms, maritime vessels and commercial buildings for both inletand exhaust duties.
Weather Louvres
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
THREE LOUVRE PROFILES ARE AVAILABLE:
• P2XLPThe specialist louvre for NATURAL VENTILATION APPLICATIONS which combines high water removal with low ‘K’ factor, and offers a unique low pressure drop characteristic for reverse flow situations.
• P2TSimple horizontal fixed blade louvres for general,less critical, duties.
• Selection of Louvre Type by Premaberg Engineers to suit the Application and Specific Customer Requirements
Weather Louvres
MATERIALS
• Marine Grade aluminium alloy• Powder coat available in many colours• Optional anodising• Stainless Steel 316L
ENGINEERING DETAILS:
• Louvre Panels are of All Welded Construction withblades positively fixed. A design with removableindividual blades is available on request.
• Premaberg Louvre Panels are designed to resistHigh Wind Loads, Impact Damage and CorrosiveElements. Results of impact damage testing areavailable.
• Bird Screens, either fixed or removable, can beprovided as an option.
• Fixing Arrangements are designed to interface withother components of the module wall such as doors,windows, explosion relief panels and steelwork.Louvre panels are normally flanged for fixing withbolts, although clamps may also be used.
• For Installations with Multiple Louvre Panels, thedrainage system is interconnected from higher tolower panels, ensuring efficient water drainage forthe whole bank of louvres.
• A standard penetration system is availableenabling pipes, ducts and cable trays to pass throughthe louvred wall with minimal effect on the louvreperformance.
• Penetrations should ideally be identified at thedesign stage prior to manufacture, but a standard kitis available should on-site penetrations be necessary.
• The Supporting Steelwork Structure can besupplied by Premaberg if required, ensuring fullcompliance with required loadings and interfacingwith the main platform structure.
Weather Louvres
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
Separation Efficiency
0
10
20
30
40
50
60
70
80
90
100
2 4 6 8 10 12 14 16 18 20Separator Velocity (m/sec.)
Sepa
ratio
n Ef
ficie
ncy
(%)
15 microns 20 microns 25 microns 30 microns
Weather Louvres
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
Pressure Drop
0
50
100
150
200
250
300
350
0 2 4 6 8 10
Pa
Velocity (m/sec.)
Inlet Exhaust
Weather Louvres
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
Water Handling Capacity
80
85
90
95
100
105
0 2 3 4 5 6 7 8 10
Wat
er L
oadi
ng (l
/min
/m²)
Velocity (m/sec)
Weather Louvres
Premaberg Manufacturing Limited - Premaberg House, 22-24 High Street, Halstead, Essex, CO9 2AP, United Kingdom.Phone: +44 (0) 1787 475651 Fax: +44 (0) 1787 475046 Email: [email protected]
Weather Louvre Aluminium Alloy
The above figures are based upon actual test carried out on a separator with open vane area of 600mm x 600mm. The noise characteristics are given based on this information and may vary depending on the configuration and air flow characteristics of any particular installation and size of separator involved”.
0
10
20
30
40
50
60
70
80
90
0 1 2 3 4 5 6 7 8 9 10
dB (A
)
Velocity (msec.)
