ASHRAE 52 2-2012 Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size.pdf

1、ANSI/ASHRAE Standard 52.2-2012(Supersedes ANSI/ASHRAE Standard 52.2-2007)Includes ANSI/ASHRAE Addenda listed in Appendix HMethod of TestingGeneral VentilationAir-Cleaning Devicesfor Removal Efficiencyby Particle SizeSee Informative Appendix H for approval dates by the ASHRAE Standards Committee, the

2、 ASHRAE Board of Directors, and theAmerican National Standards Institute.This standard is under continuous maintenance by a Standing Standard Project Committee (SSPC) for which the Standards Com-mittee has established a documented program for regular publication of addenda or revisions, including pr

3、ocedures for timely,documented, consensus action on requests for change to any part of the standard. The change submittal form, instructions, anddeadlines may be obtained in electronic form from the ASHRAE website (www.ashrae.org) or in paper form from the Manager ofStandards. The latest edition of

4、an ASHRAE Standard may be purchased from the ASHRAE website (www.ashrae.org) or fromASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: ordersashrae.org. Fax: 404-321-5478.Telephone: 404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For

5、 reprint permission, go towww.ashrae.org/permissions. 2012 ASHRAE ISSN 1041-2336SPECIAL NOTEThis American National Standard (ANS) is a national voluntary consensus standard developed under the auspices of ASHRAE.Consensus is defined by the American National Standards Institute (ANSI), of which ASHRA

6、E is a member and which has approved thisstandard as an ANS, as “substantial agreement reached by directly and materially affected interest categories. This signifies the concurrenceof more than a simple majority, but not necessarily unanimity. Consensus requires that all views and objections be con

7、sidered, and that aneffort be made toward their resolution.” Compliance with this standard is voluntary until and unless a legal jurisdiction makes compliancemandatory through legislation.ASHRAE obtains consensus through participation of its national and international members, associated societies,

8、and public review.ASHRAE Standards are prepared by a Project Committee appointed specifically for the purpose of writing the Standard. The ProjectCommittee Chair and Vice-Chair must be members of ASHRAE; while other committee members may or may not be ASHRAE members, allmust be technically qualified

9、 in the subject area of the Standard. Every effort is made to balance the concerned interests on all ProjectCommittees.The Manager of Standards of ASHRAE should be contacted for:a. interpretation of the contents of this Standard,b. participation in the next review of the Standard,c. offering constru

10、ctive criticism for improving the Standard, ord. permission to reprint portions of the Standard.DISCLAIMERASHRAE uses its best efforts to promulgate Standards and Guidelines for the benefit of the public in light of available information andaccepted industry practices. However, ASHRAE does not guara

11、ntee, certify, or assure the safety or performance of any products, components,or systems tested, installed, or operated in accordance with ASHRAEs Standards or Guidelines or that any tests conducted under itsStandards or Guidelines will be nonhazardous or free from risk.ASHRAE INDUSTRIAL ADVERTISIN

12、G POLICY ON STANDARDSASHRAE Standards and Guidelines are established to assist industry and the public by offering a uniform method of testing for ratingpurposes,bysuggestingsafepracticesindesigningandinstallingequipment,byprovidingproperdefinitionsofthisequipment,andbyprovidingother information tha

13、t may serve to guide the industry.The creation of ASHRAE Standards and Guidelines is determined by the need for them,and conformance to them is completely voluntary.In referring to this Standard or Guideline and in marking of equipment and in advertising, no claim shall be made, either stated or imp

14、lied,that the product has been approved by ASHRAE.ASHRAE STANDARDS COMMITTEE 20122013Kenneth W. Cooper, Chair Julie M. Ferguson Janice C. PetersonWilliam F. Walter, Vice-Chair Krishnan Gowri Heather L. PlattDouglass S. Abramson Cecily M. Grzywacz Ira G. PostonKarim Amrane Richard L. Hall Douglas T.

15、ReindlCharles S. Barnaby Rita M. Harrold James R. TaubyHoy R. Bohanon, Jr. Adam W. Hinge James K. VallortSteven F. Bruning Debra H. Kennoy Craig P. WrayDavid R. Conover Jay A. Kohler Charles H. Culp, III, BOD ExOSteven J. Emmerich Rick A. Larson Constantinos A. Balaras, COMark P. ModeraStephanie C.

16、Reiniche, Manager of StandardsASHRAE Standing Standard Project Committee 52.2CognizantTC:TC 2.4, Particulate Air Contaminants and Particulate Contaminant Removal EquipmentSPLS Liaison: Krishnan GowriRobert B. Burkhead, Chair Thomas A. Justice Teresa PeckBruce N. McDonald, Vice Chair Charles F. Kern

17、Mark A. RennMonroe A. Britt Carolyn M. L. Kerr John S. RobertsonEric L. Brodsky James O. Kubokawa Charles E. RoseH. E. Burroughs Erik Kuiper John SabelliMichael D. Corbat Marianne Lane Ted N. SchnipperZied Driss Carl N. Lawson Peter W. ShippLeonard E. Duello David Matier Jeffrey A. SiegelWim H. Fekk

18、es Phil Maybee Christine Q. SunJames T. Hanley Stephen W. Nicholas Donald D. ThornburgRobert Hendry Kathleen Owen Philip J. WintersChristopher B. Peart ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permit

19、ted without ASHRAEs prior written permission.CONTENTSANSI/ASHRAE Standard 52.2-2012,Method of Testing General Ventilation Air-Cleaning Devicesfor Removal Efficiency by Particle SizeSECTION PAGEForeword. 21 Purpose 32 Scope . 33 Definitions and Acronyms. 34 Test Apparatus 45 Apparatus Qualification T

20、esting 116 Test Materials . 167 Selection and Preparation of the Test Device. 178 Test Procedures 189 Measurement of Resistance versus Airflow 1810 Determination of Particle Size Efficiency 1911 Reporting Results . 2412 Minimum Efficiency Reporting Value (MERV) for Air Cleaners 2513 Normative Refere

21、nces 25Informative Appendix ACommentary 29Informative Appendix BTest Procedure Suggestions and Examples 32Informative Appendix CHow to Read a Test Report. 38Informative Appendix DMinimum Efficiency Reporting Guidance. 42Informative Appendix ECross-Reference and Application Guidelines 44Informative A

22、ppendix FAcronyms and Conversion Formulae .46Informative Appendix GInformative References 47Informative Appendix HAddenda Description Information 48Informative Appendix I(Intentionally Left Blank) 49Informative Appendix JOptional Method of Conditioning a Filter Using Fine KCl Particles to Demonstrat

23、e Efficiency Loss that Might be Realized in Field Applications. 50NOTEApproved addenda, errata, or interpretations for this standard can be downloaded free of charge from the ASHRAE Web site at www.ashrae.org/technology. 2012 ASHRAE1791 Tullie Circle NE Atlanta, GA 30329 www.ashrae.org All rights re

24、served.ASHRAE is a registered trademark of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.ANSI is a registered trademark of the American National Standards Institute. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmi

25、ssion in either print or digital form is not permitted without ASHRAEs prior written permission.2 ANSI/ASHRAE Standard 52.2-2012(This foreword is not a part of this standard. It is merelyinformative and does not contain requirements necessaryfor conformance to the standard. It has not beenprocessed

26、according to the ANSI requirements for astandard and may contain material that has not beensubject to public review or a consensus process.Unresolved objectors on informative material are notoffered the right to appeal at ASHRAE or ANSI.)FOREWORDANSI/ASHRAE Standard 52.2-2012 incorporatesAddendum b

27、into the standards previous edition, Standard52.2-2007. Addendum b was part of a larger plan to combineStandards 52.1 and 52.2 into a single standard on air filtertesting. Part 1 of Addendum b incorporates the 52.1 sectionson arrestance and dust-holding capacity into Standard 52.2and deletes some re

28、ferences to Standard 52.1 that occur inStandard 52.2. Part 2 of Addendum b adds a new informativeappendix to the standard, Appendix J. InformativeAppendix J provides an optional method of conditioning afilter using fine potassium chloride (KCl) particles to demon-strate efficiency loss that might be

29、 realized in field applica-tions.Standard 52.2 was developed so that both users andspecifiers can compare products, predict a uniform level ofknown performance under operating conditions with reason-able certainty, and determine appropriate air-cleaner effi-ciencies for specific situations.Historica

30、lly, standards for testing air cleaners havebeen developed in response to the needs of the times. Protec-tion of machinery and coils came first, then reduction of soil-ing. Now concerns about indoor air quality and respirableparticles, protection of products during manufacturing, andprotection of HV

31、AC equipment have prompted developmentof this test standard based on particle size.Standards Project Committee (SPC) 52.2 was first orga-nized in 1987 to develop a particle size test procedure butwas disbanded in 1990 after it became evident that basicresearch was needed. In 1991, a research contrac

32、t (ASHRAEResearch Project RP-671, Reference A.2 in InformativeAppendix A) was awarded to review test methodology andrecommend approaches for obtaining particle size efficiencydata. After the research project was completed and acceptedin 1993, SPC 52.2 was reactivated with members represent-ing a bro

33、ad range of interests.The standard was then formally published in 1999;immediately ASHRAE Technical Committee 2.4 started workon two new research efforts. The first, ASHRAE RP-1189,“Investigation of Mechanisms and Operating Environmentsthat Impact the Filtration Efficiency of Charged Air Filtra-tion

34、 Media,” and the second, ASHRAE RP-1190, “Develop aNew Loading Dust and Dust Loading Procedures forASHRAE Filter Test Standard 52.1 and 52.2,” were com-pleted by 2003. The standard was republished in 2007 andAddendum b, resulting from the research projects, was pub-lished in 2008.SPC 52.2 debated ma

35、ny questions in writing this stan-dard. Comments on some of the more important of thesequestions, which are included in Informative Appendix A,regard the bend in the test duct; the use of a particles physi-cal size, its aerodynamic size, or its light-scattering size;dust loading and minimum efficien

36、cy reporting; the particlesize range covered by the standard; and the selection of thetest aerosol.Description of StandardThis standard addresses two air-cleaner performancecharacteristics of importance to users: the ability of thedevice to remove particles from the airstream and its resis-tance to

37、airflow. Air-cleaner testing is conducted at airflowrates not less than 0.22 m3/s (472 cfm) nor greater than1.4 m3/s (3000 cfm).A sample of air from a general ventilation system con-tains particles with a broad range of sizes having variedeffects, sometimes dependent on particle size. Coarse parti-c

38、les, for example, cause energy waste when they cover heattransfer surfaces. Fine particles cause soiling and discolor-ation of interior surfaces and furnishings as well as possiblehealth effects when inhaled by occupants of the space. Whenair cleaners are tested and reported for efficiency in accor-

39、dance with this standard, there is a basis for comparison andselection for specific tasks.The test procedure uses laboratory-generated KCl parti-cles dispersed into the airstream as the test aerosol. A parti-cle counter measures and counts the particles in 12 sizeranges, both upstream and downstream

40、, for the efficiencydeterminations.This standard also delineates a method of loading theair cleaner with synthetic dust to simulate field conditions. Aset of particle size removal efficiency (PSE) performancecurves at incremental dust loading is developed and,together with an initial clean performan

41、ce curve, is the basisof a composite curve representing the minimum performancein each size range. Points on the composite curve are aver-aged and the averages are then used to determine the mini-mum efficiency reporting value (MERV) of the air cleaner.Coarse air cleaners may be tested for particle

42、sizeremoval efficiency when they are clean with results reportedin the prescribed format. (An example of a coarse air cleaneris the so-called “furnace” filter, a flat panel with a card-board frame and spun glass fiber media.) However, this newedition of the standard also provides the basis for evalu

43、ationusing the loading dust efficiency by weight, or “arrestance,”as well as an estimate of predicted life called dust holdingcapacity.Electronic Air CleanersSome air cleaners, such as externally powered electro-static precipitators (also known as electronic air cleaners),may not be compatible with

44、the loading dust used in this testmethod. The dust contains very conductive carbon that maycause electrical shorting, thus reducing or eliminating theeffectiveness of these devices and negatively affecting theirMERVs. In actual applications, the efficiency of thesedevices may decline over time, and

45、their service life isdependent on the conductivity and the amount of dust col-lected. ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAEs prior written permission.ANSI/ASHRAE Standard

46、52.2-2012 3Passive Electrostatic Fibrous Media Air FiltersSome fibrous media air filters have electrostatic chargesthat may be either natural or imposed upon the media duringmanufacturing. Such filters may demonstrate high efficiencywhen clean and a drop in efficiency during their actual usecycle. T

47、he initial conditioning step of the dust-loading proce-dure described in this standard may affect the efficiency ofthe filter but not as much as would be observed in actual ser-vice. Therefore, the minimum efficiency observed during test-ing may be higher than that achieved during actual use.Not an

48、Application StandardUsers should not misinterpret the intent of this standard.This is a test method standard, and its results are to be usedto directly compare air cleaners on a standardized basis irre-spective of their applications. Results are also used to givethe design engineer an easy-to-use ba

49、sis for specifying anair cleaner. It is entirely possible that an industry organiza-tion may use this test method as the basis for an applicationstandard with, for example, different final resistances.Footnotes are used throughout this standard to providenonmandatory guidance for the user in addition to the non-mandatory guidance found in the informative appendices.Footnotes are for information only and are not part of thestandard.AcknowledgmentsSSPC 52.2 wishes to acknowledge with thanks the con-tributions of many people outside the voting membership,inclu