1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 29462:2013Field testing of general ventilation filtration devices and systems for in situ removal efficiency by particle size and r e s i s t a n c e t o a i r f l o w
2、BS EN ISO 29462:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 29462:2013.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/21/3, Air filters other than for air supply for I.C.engines and compressors.A list of organization
3、s represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013 ISBN 978
4、 0 580 69478 3 ICS 91.140.30 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013. Amendments issued since publicationDate Text affectedEUROPEAN STANDARD
5、NORME EUROPENNE EUROPISCHE NORM EN ISO 29462 March 2013 ICS 91.140.30 English Version Field testing of general ventilation filtration devices and systems for in situ removal efficiency by particle size and resistance to airflow (ISO 29462:2013) Essais in situ de filtres et systmes de ventilation gnr
6、ale pour la mesure de lefficacit en fonction de la taille des particules et de la perte de charge (ISO 29462:2013) Betriebserprobung von Filtereinrichtungen und -systemen fr die allgemeine Lftung hinsichtlich ihrer Abscheideeffizienz im eingebautem Zustand bezogen auf die Partikelgre und den Druckve
7、rlust (ISO 29462:2013)This European Standard was approved by CEN on 1 March 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and
8、bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the re
9、sponsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav
10、Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE N
11、ORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 29462:2013: EBS EN ISO 29462:2013EN ISO 29462:2013 (E) 3 Foreword This docume
12、nt (EN ISO 29462:2013) has been prepared by Technical Committee ISO/TC 142 “Cleaning equipment for air and other gases“ in collaboration with Technical Committee CEN/TC 195 “Air filters for general air cleaning” the secretariat of which is held by UNI. This European Standard shall be given the statu
13、s of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2013, and conflicting national standards shall be withdrawn at the latest by September 2013. Attention is drawn to the possibility that some of the elements of this document may be the
14、subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium
15、, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerla
16、nd, Turkey and the United Kingdom. Endorsement notice The text of ISO 29462:2013 has been approved by CEN as EN ISO 29462:2013 without any modification. BS EN ISO 29462:2013ISO 29462:2013(E) ISO 2013 All rights reserved iiiContents PageForeword vIntroduction vi1 Scope . 12 Normative references 13 Te
17、rms, definitions, and abbreviations . 13.1 Terms and definitions . 13.2 Abbreviations . 34 Test equipment and setup 34.1 Particle counter 34.2 Diluter . 34.3 Pump 44.4 Sampling system 44.5 Air velocity measurement instrument . 64.6 Relative humidity measurement instrument 64.7 Temperature measuremen
18、t instrument . 64.8 Resistance to airflow measurement instrument . 64.9 Test equipment maintenance and calibration . 75 Site evaluation . 75.1 General . 75.2 Filter installation pre-testing inspection 75.3 Approval for testing 76 Test procedure 86.1 Air velocity 86.2 Relative humidity 86.3 Temperatu
19、re 86.4 Resistance to airflow 96.5 Removal efficiency . 96.6 Sampling probes . 127 Expression of results .147.1 General information 147.2 Data collection 158 Errors and data analyses .168.1 General 168.2 Relative humidity . 168.3 Air temperature . 168.4 Aerosol composition . 168.5 Uniformity of aero
20、sol concentration . 178.6 Coincidence errors Particle counter 178.7 Particle losses 179 Calculation of results 179.1 Calculation of removal efficiency . 179.2 Calculation of uncertainty 209.3 Coefficient of variation (CV) . 2010 Optional enhanced test system .2110.1 Application of enhanced test . 21
21、10.2 Principle of the enhanced test system . 2210.3 Determination of the corrected particle size .2310.4 Presentation of results 24Annex A (informative) Filter installation pre-testing inspection form .25BS EN ISO 29462:2013ISO 29462:2013(E)iv ISO 2013 All rights reservedAnnex B (informative) Approv
22、al for testing form 28Annex C (informative) Example of how to complete testing .30Bibliography .46BS EN ISO 29462:2013ISO 29462:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
23、ternational Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison
24、with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technic
25、al committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to
26、 the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 29462 was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other gases. ISO 2013 All rights r
27、eserved vBS EN ISO 29462:2013ISO 29462:2013(E)IntroductionThe purpose of this International Standard is to provide a test procedure for evaluating the in-situ performances of general ventilation filtration devices and systems. Although any filter with a filtration efficiency at or above 99% or at or
28、 below 30% when measured at 0,4 m could theoretically be tested using this International Standard, it may be difficult to achieve statically acceptable results for these type of filtration devices.Supply air to the Heating, Ventilation and Air-Conditioning (HVAC) system contains viable and non-viabl
29、e particles of a broad size range. Over time these particles will cause problems for fans, heat exchangers and other system parts, decreasing their function and increasing energy consumption and maintenance. For health issues, the fine particles (1,0 m will therefore have lower accuracy and so the r
30、esults should be interpreted with respect to this.During in-situ measurement conditions, the optical properties of the particles may differ from the optical properties of the particles used for calibrating the particle counter and testing it in the laboratory. Thus the particle counter could size th
31、e particles differently but count the overall number of particles correctly.By adding an extra reference filter, the effect of varying measuring conditions can be reduced. Additionally, using this enhanced test method, the results can be used to correct the measured efficiencies in relation to the e
32、fficiency of the reference filter measured in laboratory using a standardized test aerosol.The results from using the standard method or the enhanced method will give both users and manufacturers a better knowledge of actual filter and installation properties.It is important to note that field measu
33、rements generally result in larger uncertainties in the results compared to laboratory measurements. Field measurements may produce uncertainty from temporal and spatial variability in particle concentrations, from limitations on sampling locations due to air handling unit configurations, and from t
34、he use of field instrumentation. These factors may result in lower accuracy and precision in the calculated fractional efficiencies compared to laboratory measurements. This International Standard is intended to provide a practical method in which the accuracy and precision of the result are maximiz
35、ed (and the precision of the result quantified) by recommending appropriate sampling locations, sample quantities, and instrumentation. This International Standard is not intended to serve as a filter performance rating method. The results obtained from the test method described in this Internationa
36、l Standard do not replace those obtained through tests conducted in the laboratory.vi ISO 2013 All rights reservedBS EN ISO 29462:2013Field testing of general ventilation filtration devices and systems for in situ removal efficiency by particle size and resistance to airflow1 ScopeThis International
37、 Standard describes a procedure for measuring the performance of general ventilation air cleaning devices in their end use installed configuration. The performance measurements include removal efficiency by particle size and the resistance to airflow. The procedures for test include the definition a
38、nd reporting of the system airflow.The procedure describes a method of counting ambient air particles of 0,3 m to 5,0 m upstream and downstream of the in-place air cleaner(s) in a functioning air handling system. The procedure describes the reduction of particle counter data to calculate removal eff
39、iciency by particle size.Since filter installations vary dramatically in design and shape, a protocol for evaluating the suitability of a site for filter evaluation and for system evaluation is included. When the evaluated site conditions meet the minimum criteria established for system evaluation,
40、the performance evaluation of the system can also be performed according to this procedure.This International Standard also describes performance specifications for the testing equipment and defines procedures for calculating and reporting the results. This International Standard is not intended for
41、 measuring performance of portable or movable room air cleaners or for evaluation of filter installations with and expected filtration efficiency at or above 99 % or at or below 30 % when measured at 0,4 m.2 Normative referencesThe following referenced documents are indispensable for the application
42、 of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7726, Ergonomics of the thermal environment Instruments for measuring physical quantitiesISO 14644-3, Cleanrooms and a
43、ssociated controlled environments Part 3: Test methodsISO 21501-4, Determination of particle size distribution Single particle light interaction methods Part 4: Light scattering airborne particle counter for clean spaces3 Terms, definitions, and abbreviations3.1 Terms and definitionsFor the purpose
44、of this document, the following terms and definitions apply.3.1.1air filter bypassunfiltered air that has passed through the AHU filter installation but remained unfiltered because it bypassed the installed air filtersINTERNATIONAL STANDARD ISO 29462:2013(E) ISO 2013 All rights reserved 1BS EN ISO 2
45、9462:2013ISO 29462:2013(E)3.1.2air velocityrate of air movement at the filterNote 1 to entry: It is expressed in m/s (fpm) to three significant figures.3.1.3allowable measurable concentration of the particle counterfifty percent of the maximum measurable concentration as stated by the manufacturer o
46、f the particle counter3.1.4coefficient of variationCVstandard deviation of a group of measurements divided by the mean3.1.5diluterdilution systemsystem for reducing the sampled concentration to avoid coincidence error in the particle counter3.1.6filter efficiencyremoval efficiency of a filter as det
47、ermined by this International Standard, where upstream and downstream particle count measurements are taken close to the filter being tested3.1.7filter installationfiltration devices and systems such as a single filter or a group of filters mounted together with the same inlet and outlet of air3.1.8
48、general ventilationprocess of moving air from outside the space, recirculated air, or a combination of these into or about a space or removing it from the space3.1.9isoaxial samplingsampling in which the flow in the sampler inlet is moving in the same direction as the flow being sampled3.1.10isokine
49、tic samplingtechnique for air sampling such that the probe inlet air velocity is the same as the velocity of the air surrounding the sampling pointSource: ISO 29464:2011; 3.1.1443.1.11particle counterdevice for detecting and counting numbers of discrete airborne particles present in a sample of airSource: ISO 29464:2011; 3.1.273.1.12particle size rangedefined particle counter channel3.1.13reference filtersmall dry media-type filter that has been laboratory tested for removal efficiency by particle size2 ISO 2013 All rights reserved
