SIST EN 13181:2001
(Main)Ventilation for buildings - Terminals - Performance testing of louvres subject to simulated sand
Ventilation for buildings - Terminals - Performance testing of louvres subject to simulated sand
This European Standard specifies a method for measuring the sand rejection efficiency of sand trap louvres subject to simulated sand and with inlet air flow through the louvre under test. The Standard considers a 1000 mm ´ 1000 mm section of sand trap louvre, or the nearest possible blade increment, for evaluation purposes.
The purpose of the tests incorporated in this European Standard is as follows:
a) Sand Rejection Effectiveness
To establish the sand rejection effectiveness when subjected to various air flow rates through the assembly.
b) Entry loss coefficient/Pressure requirements
To establish the air pressure loss through the sand trap louvre at various air flow rates and by calculation Discharge Loss Coefficient.
Lüftung von Gebäuden - Endgeräte - Leistungsprüfung von Schutzblenden unter Einwirkung von simuliertem Sand
Diese Norm legt ein Verfahren zur Messung des Sandrückhaltegrades von Sandfangblenden unter Einwirkung von simuliertem Sand und bei einströmendem Luftstrom durch die zu prüfende Haube fest. Für die Bewertung wird in der Norm ein Abschnitt von 1 000 mm ´ 1 000 mm einer Sandfangblende oder die nächstgrößere Lamellengröße betrachtet.
Der Zweck der Prüfungen dieser Europäischen Norm besteht in
a) Sandrückhaltegrad
Festlegung des Sandrückhaltegrades, wenn unterschiedliche Luftvolumenströme durch die Baueinheit strömen.
b) Anforderungen an den Eintrittsverlustkoeffizienten bzw. Druckverlust
Festlegung des Luftdruckverlustes durch die Sandfangblende bei unterschiedlichen Luftvolumenströmen und
durch Berechnung des Austrittsverlustkoeffizienten.
Ventilation des bâtiments - Bouches d'air - Performances des grilles soumises a une simulation de sable
La présente Norme européenne prescrit une méthode de mesure de l'efficacité du rejet de sable des grilles équipées de piege a sable soumises a une simulation de sable et avec passage de l'air d'entrée par la grille soumise a essai. Pour les besoins de l'évaluation, la norme examine une section de 1 000 mm x 1 000 mm d'une grille équipée de piege a sable ou l'incrément de lame le plus proche possible.
Les essais mentionnés dans la présente Norme européenne ont les objectifs suivants :
a) efficacité du rejet de sable
Etablir l'efficacité du rejet de sable lors du passage de divers débits d'air dans l'ensemble.
b) Exigence en matiere de pression/coefficient d'entrée
Etablir la perte de pression d'air par la grille équipée de piege a sable pour divers débits d'air, en calculant le coefficient de décharge.
Prezračevanje stavb - Enote - Preskušanje lastnosti prezračevalnih odprtin, izpostavljenih vplivu simulacije peska
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Endgeräte - Leistungsprüfung von Schutzblenden unter Einwirkung von simuliertem SandVentilation des bâtiments - Bouches d'air - Performances des grilles soumises a une simulation de sableVentilation for buildings - Terminals - Performance testing of louvres subject to simulated sand91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 13181:2001SIST EN 13181:2001en01-december-2001SIST EN 13181:2001SLOVENSKI
STANDARD
SIST EN 13181:2001
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13181August 2001ICS 23.120English versionVentilation for buildings - Terminals - Performance testing oflouvres subject to simulated sandVentilation des bâtiments - Bouches d'air - Performancesdes grilles soumises à une simulation de sableLüftung von Gebäuden - Endgeräte - Leistungsprüfung vonSchutzblenden unter Einwirkung von simuliertem SandThis European Standard was approved by CEN on 22 June 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13181:2001 ESIST EN 13181:2001
EN 13181:2001 (E)2ContentsPageForeword.31Scope.32Normative references.33Terms and definitions.44Symbols and subscripts.54.1Symbols.54.2Subscripts.55Instrumentation.65.1Air flow rate measurement.65.2Pressure measurement.65.3Temperature measurement.75.4Weighing equipment.75.5Timers.76Test apparatus.76.1Aerodynamic sand trap louvre test facility.76.2Sand injector equipment.76.3Aerodynamic measurement section.87Grading of the test sand.138Pre-test of sand distribution for each test series.149Test methods.179.1Sand rejection.179.2Entry loss coefficient/pressure loss.19Annex A (informative)
Typical test results and calculation examples.22A.1Entry loss coefficient.22A.2Sand trap louvre effectiveness.23A.2.1Recording results.23A.2.2Rating.23SIST EN 13181:2001
EN 13181:2001 (E)3ForewordThis European Standard has been prepared by Technical Committee CEN/TC 156 "Ventilation forbuildings” the secretariat of which is held by BSI.This European Standard shall be given the status of a national standard, either by publication of anidentical text or by endorsement, at the latest by February 2002, and conflicting national standardsshall be withdrawn at the latest by February 2002.According to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.WarningAttention is drawn to the possible risks associated with static electricity charge build-up, when usingvacuum cleaners with plastic dust containers during sand trap louvre testing, in order that appropriateprecautions are taken to safeguard the health of those involved.1 ScopeThis European Standard specifies a method for measuring the sand rejection efficiency of sand traplouvres subject to simulated sand and with inlet air flow through the louvre under test. The Standardconsiders a 1000 mm
1000 mm section of sand trap louvre, or the nearest possible blade increment, forevaluation purposes.The purpose of the tests incorporated in this European Standard is as follows:a) Sand Rejection EffectivenessTo establish the sand rejection effectiveness when subjected to various air flow rates through theassembly.b) Entry loss coefficient/Pressure requirementsTo establish the air pressure loss through the sand trap louvre at various air flow rates and bycalculation Discharge Loss Coefficient.2 Normative referencesThis European Standard incorporates, by dated or undated reference, provisions from other publications.These normative references are cited at the appropriate places in the text and the publications are listedhereafter. For dated references, subsequent amendments to or revisions of any of these publicationsapply to this European Standard only when incorporated in it by amendment or revision. For undatedreferences the latest edition of the publication referred to applies (including amendments).CR 12792, Ventilation for buildings — Symbols and terminologySIST EN 13181:2001
EN 13181:2001 (E)4EN ISO 5167-1, Measurement of fluid flow by means of pressure differential devices — Part 1 orificeplates, nozzles and venturi tubes inserted in circular cross-section conduits running full. (ISO 5167-1:1991)ISO 3966, Measurement of fluid flow in closed conduits - Velocity area method using Pitot static tubesISO 5221, Air distribution and air diffusion — Rules to methods of measuring air flow rate in an airhandling ductISO 5801, Industrial fans - Performance testing using standardized airways3 Terms and definitionsFor the purposes of this European Standard the terms and definitions given in CR 12792, togetherwith the following, apply:3.1sand trap louvredevice intended to allow the passage of supply or exhaust air while minimising the ingress of airbornesandNOTESand trap louvres are air terminal devices for use in desert-like conditions or other conditions whereairborne sand is present. They are usually positioned on the inlets to air distribution systems or parts of abuilding, to alleviate the load on the main filtration of air conditioning and similar systems.3.2sand trap louvre core areaproduct of the minimum height and minimum width of the front opening in the sand trap louvreassembly with the louvre blades removed (see Figure 5)3.3entry loss coefficient of a louvreactual air flow rate divided by the theoretical air flow rate at a given pressure difference across thelouvre3.4theoretical air flowproduct of the louvre core area and the air velocity calculated using the pressure difference across thelouvre as the velocity pressure, assuming CE = 1 (see clause 4)3.5sand rejection effectivenessquotient resulting from the total weight of sand rejected divided by the total weight of sand injected, atany velocity through the louvreSIST EN 13181:2001
EN 13181:2001 (E)54 Symbols and subscripts4.1 SymbolsSymbolQuantityUnitALouvre core aream2CEEntry Loss Coefficient-miSand supply to the injectorkgmuSand collected upstream of the test louvrekgpsaAbsolute static pressurePapaAtmospheric pressurePapdDynamic (Velocity) pressure ½ v2PaptaStagnation or absolute total pressurePapsStatic gauge pressure (psa - pa)PaptTotal pressure (pta - pa)PapFlow meter pressure differencePaptConventional total pressure differential for an air density of 1,2 kg m-3at the inlet to the sand trap louvre under testPaqvVolume rate or air flow at the flow meterm3s-1v Core Velocitym s-1Effectiveness%Air densitykg m-3Temperature°C4.2 SubscriptsSubscriptDescriptionloutlet of the sand trap louvre under testmmeasuring point at the flow meternvalue at selected point of flow rate/static pressure curveSIST EN 13181:2001
EN 13181:2001 (E)65 Instrumentation5.1 Air flow rate measurementThe air flow rate shall be measured using instruments and techniques in accordance withEN ISO 5167-1, ISO 5221, and ISO 5801.Air flow meters shall have the ranges and accuracies specified in Table 1.Table 1 — Ranges and accuracies of flow metersRangeUncertainty of Measurementm3 s-1%from 0,07 to 7± 2,5from 0,007 to 0,07± 5NOTEFlow meters can be calibrated in situ by means of pitot static tube traverse techniques described in ISO3966.Flow meters shall be checked at intervals as appropriate but not exceeding 12 months.
This check cantake the form of one of the following:a) a dimensional check for all flow meters not requiring calibration;b) a check calibration over their full range using the original method employed for initialcalibration of meters calibrated in situ;c) a check against a flow meter which meets the flow meter specification described in ISO 5221.5.2 Pressure measurement5.2.1Pressure in the duct shall be measured by means of a liquid-filled calibrated manometer, orany other device conforming to 5.2.2.5.2.2The maximum scale interval shall not be greater than the characteristics given in Table 2 forthe appropriate range of manometers.Table 2 — Range and scale interval for manometersRangeMax. scale intervalPaPa 251,0> 25 to
2502,5> 250 to
5005,0> 50025,0SIST EN 13181:2001
EN 13181:2001 (E)75.2.3For air flow measurements, the minimum pressure differential shall be:a) 25 Pa with an inclined tube manometer or micro-manometer;b) 500 Pa with a
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