1、BRITISH STANDARDBS 848-3:2001%6(1ISO 5802:200Fans for general purpose Part 3: Performance testing in situICS 23.120NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW8Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIBS EN ISO 5802:
2、2008This British Standardpublished under the authority of the Standards Committee and comes into effect on 15 September 2001 BSI ISBN National forewordThis British Standard is the UK implementation of EN ISO 5802:2008. It This British standard is a companion standard to Performance testing using sta
3、ndardized airways. The UK participation in its preparation was entrusted to Technical Committee MCE/17, Industrial fans. A list of organizations represented on this committee can be obtained on request to its secretary.a contract. Users are responsible for its correct application. Compliance with a
4、British Standard cannot confer immunity from legal obligations.to BS 848-1:1997 -This publication does not purport to include all the necessary provisions of Amendments/corrigenda issued since publicationDate Comments31 May 2009 Implementation of CEN endorsement of ISO 5802:2001, still dual numbered
5、 as BS 848-3:2001was is identical to ISO 5802:2001. Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 5802October 2008ICS 23.120English VersionIndustrial fans - Performance testing in situ (ISO 580
6、2:2001)Ventilateurs industriels - Essai de performance in situ (ISO5802:2001)This European Standard was approved by CEN on 2 October 2008.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
7、 standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any ot
8、her language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia,
9、Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KO
10、MITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 5802:2008: ELicensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (
11、c) BSIForeword The text of ISO 5802:2001 has been prepared by Technical Committee ISO/TC 117 “Industrial fans” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 5802:2008 by Technical Committee CEN/TC 156 “Ventilation for buildings” the secretariat of whic
12、h is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2009, and conflicting national standards shall be withdrawn at the latest by April 2009. Attention is drawn to the possibili
13、ty that some of the elements of this document may be the 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 bo
14、und to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden,
15、Switzerland and the United Kingdom. Endorsement notice The text of ISO 5802:2001 has been approved by CEN as a EN ISO 5802:2008 without any modification. ii BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIiiiC
16、ontents PageForewordvIntroductionvi1 Scope 12 Normative references 13 Terms, definitions and symbols.13.1 Terms and definitions .13.2 Symbols 144 Quantities to be measured185 General conditions and procedures concerning in situ tests 185.1 General recommendations .185.2 Selection of test point when
17、only the system resistance can be varied185.3 Fans fitted with adjustment devices195.4 System throttling devices allowing the system resistance to be altered 195.5 Selection of the test point when the system resistance cannot be varied195.6 When correction of the coefficient deduced from the test is
18、 not necessary 206 Instrumentation206.1 Instrumentation for measurement of pressure.206.2 Measurement of air velocity .216.3 Measurement of temperature .236.4 Determination of density.246.5 Measurement of rotational speed 257 Determination of fan pressure257.1 Location of pressure measurement plane
19、257.2 Measurement of fan pressure.278 Determination of flow rate 368.1 Choice of measuring method .368.2 Choice of measuring section368.3 Determination of flowrate using differential pressure devices.388.4 Determination of flowrate by velocity area methods .389 Determination of power.549.1 Definitio
20、n of performance characteristics relating to the power of a fan549.2 Losses during transmission of power from the motor to the impeller 569.3 Methods for determination of power .569.4 Measuring instruments .599.5 Precautions to be taken during in situ tests.5910 Uncertainty associated with the deter
21、mination of fan performance5910.1 General5910.2 Performance errors .6010.3 Uncertainty of measurement 6010.4 Specified uncertainties .6010.5 Analysis of uncertainty .60Annex A (normative) Position of exploration lines for a marginal wall profile compatible with a generalpower law67Annex B (normative
22、) Determination of the position of the marginal exploration lines in cases notcovered by annex A.71BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIivAnnex C (normative) Minimum straight lengths required upstre
23、am and downstream of the differentialpressure devices (DP device) used for flow measurement.74Annex D (normative) Loss allowance for straight, smooth ducts and standardized airways 82Annex E (normative) Rotating vane anemometer calibration.84Bibliography 86BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Lic
24、ensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIvForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISOmember bodies). The work of preparing International Standards is normally carri
25、ed out through ISO technicalcommittees. Each member body interested in a subject for which a technical committee has been established hasthe right to be represented on that committee. International organizations, governmental and non-governmental, inliaison with ISO, also take part in the work. ISO
26、collaborates closely with the International ElectrotechnicalCommission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.Draft International Standards adopted by the technical committees a
27、re 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 the possibility that some of the elements of this International Standard may be the subject ofpatent rights. ISO shall n
28、ot be held responsible for identifying any or all such patent rights.International Standard ISO 5802 was prepared by Technical Committee ISO/TC 117, Industrial fans.Annexes A to E form a normative part of this International Standard.BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Licensed Copy: Wang Bin, IS
29、O/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIviIntroductionThe need to revise existing methods of site testing has been apparent for some time. Bearing in mind the extent ofthese revisions, it was felt appropriate to expand the method of site testing into a “stand-alone“ d
30、ocument. Thiswould enable the velocity area methods to be fully detailed for all commonly encountered airway cross-sections. Itwould also allow the addition of descriptive annexes covering the selection of suitable measuring stations andinstrument calibration.In accordance with recent International
31、agreements, it will be noted that fan pressure is now defined as thedifference between stagnation pressure at the fan inlet and outlet. Stagnation pressure is the absolute pressurewhich would be measured at a point in a flowing gas if it were brought to rest isentropically. For Mach numbers lessthan
32、 0,2 the gauge stagnation pressure is within 0,6 % of the total pressure.Less emphasis is placed on the use of “fan static pressure“ as this is a conventional quantity only. It is to beanticipated that its use will cease with time. All fluid losses are essentially losses in stagnation pressure and t
33、hishas been reflected in the definitions now specified.It should be recognized that the performance of a fan measured under site conditions will not necessarily be thesame as that determined from tests using standardized airways. The reasons for such differences are not only dueto the inherently low
34、er accuracy of a site test, but also due to the so-called “system effect factor“ or “installationeffect“, where the ducting connections at fan inlet and/or outlet modify its performance. The need for goodconnections cannot be understated. This International Standard specifies the use of “common part
35、s“ immediatelyadjoining the fans for the consistent determination of pressure and also to ensure that air/gas is presented to thefan as a symmetrical velocity profile free from swirl and undue distortion. Only if these conditions are met, will theperformance under site conditions equate with those m
36、easured in standardized airways.It should also be noted that this International Standard specifies the positioning of velocity-area measuring pointsaccording to log-Tchebycheff or log-linear rules. Arithmetic spacing can lead to considerable error unless a veryhigh number of point readings are taken
37、. (These would then have to be plotted graphically and the area under thecurve obtained using planimetry. The true average velocity would be this area divided by the dimensionalordinates).It is outside the scope of this International Standard to assess the additional uncertainty where the lengths of
38、straight duct either side of the measuring station are less than those specified in annex C. Guidance is, however,given in ISO/TR 5168 and ISO 7194, from which it will be seen that where a significant radial component exists,uncertainties can considerably exceed the normally anticipated 4 % at 95 %
39、confidence levels.BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BSIIndustrial fans Performance testing in situ1 ScopeThis International Standard specifies tests for determining one or more performance character
40、istics of fans installedin an operational circuit when handling a monophase fluid.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis International Standard. For dated references, subsequent amendments to, or
41、revisions of, any of thesepublications do not apply. However, parties to agreements based on this International Standard are encouraged toinvestigate the possibility of applying the most recent editions of the normative documents indicated below. Forundated references, the latest edition of the norm
42、ative document referred to applies. Members of ISO and IECmaintain registers of currently valid International Standards.ISO 5167-1:1991, Measurement of fluid flow by means of pressure differential devices Part 1: Orifice plates,nozzles and Venturi tubes inserted in circular cross-section conduits ru
43、nning full.ISO 5801:1997, Industrial fans Performance testing using standardized airways.IEC 60034-1, Rotating electrical machine Part 1: Rating and performance.IEC 60051-8, Direct acting indicating analogue electrical measuring instruments and their accessories Part 8:Special requirements for acces
44、sories.3 Terms, definitions and symbols3.1 Terms and definitionsFor the purposes of this International Standard, the following terms and definitions apply.The quantities referred to are time-averaged mean values. Fluctuations which affect the quantities being measuredmay be accounted for by repeatin
45、g measurements at appropriate time intervals. Mean values may then becalculated which are taken as the steady-state value.3.1.1airair or other gas, except when specifically referred to as atmospheric air3.1.2standard airatmospheric air having a density of exactly 1,2 kgGd7m3NOTE Atmospheric air at a
46、 temperature of 16 C, a pressure of 100 000 Pa and a relative humidity of 65 %, has a densityof 1,2 kgGd7m3, but these conditions are not part of the definition.1BS EN ISO 5802:2008 EN ISO 5802:2008 (E)Licensed Copy: Wang Bin, ISO/EXCHANGE CHINA STANDARDS, 16/09/2009 07:03, Uncontrolled Copy, (c) BS
47、I3.1.3fanrotary machine which maintains a continuous flow of air at a pressure ratio not normally exceeding 1,33.1.4impellerrotating part of a fan which, by means of its blades, transfers energy to the air3.1.5casingthose stationary parts of a fan which direct the flow of air from the fan inlet open
48、ing(s) to the fan outlet opening(s)3.1.6ductairway in which the air velocity is comparable with that at the fan inlet or outlet3.1.7chamberairway in which the air velocity is small compared with that at the fan inlet or outlet3.1.8transition piecesectionairway along which there is a gradual change o
49、f cross-sectional area and/or shape3.1.9test enclosureroom, or other space protected from draught, in which the fan and test airways are situated3.1.10area of the conduit sectionAxarea of the conduit at section x3.1.11fan inlet areaA1by convention, the gross area in the inlet plane inside the casingNOTE The fan inlet plane should be taken as that surface bounded by the upstream extremity of the air moving device. Inthis International Standard the fan inlet plane is indicated by plane 1 (see Figure 1).3.1.12fan outlet a
