BS 848-10-1999 Fans for general purposes - Performance testing of jet fans《一般用途风扇 喷气风扇性能试验》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS 848-10:1999 ISO 13350:

2、1999 ICS 23.120 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Fans for general purposes Part 10: Performance testing of jet fansThis British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Stand

3、ards Committee and comes into effect on 15 November 1999 BSI 11-1999 ISBN 0 580 35395 8 BS 848-10:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard reproduces verbatim ISO 13350:1999 and implements it as the UK national standard. The UK participa

4、tion in its preparation was entrusted to Technical Committee MCE/17, Industrial fans, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK inter

5、ests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications refer

6、red to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a c

7、ontract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1

8、to 25 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued.A Referencenumbe r ISO13350:1999 (E) INTERNATIONAL STANDARD ISO 13350 Firstedition 19991001 IndustrialfansPerformancetestingofjet fans VentilateursindustrielsEssaideperformancedesv

9、entilateurs acclrateursISO13350:1999(E) ii Contents 1Scop e1 2Normativereference s1 3Definition s2 4Symbolsandabbreviation s4 5Characteristicstobemeasure d.5 6Instrumentationandmeasurement s5 7Determinationofthrus t.6 8Determinationofsoundleve l.11 9Determinationofvibrationvelocit y13 10Determinatio

10、nofflowrat e.15 11Presentationofresult s18 12Tolerancesandconversionrule s.19 AnnexA (informative) Illustrationofreferencesoundsource. .21 AnnexB (informative) Correctionofsoundpressurelevel s.22 AnnexC (informative) Conversionrule s.23 AnnexD (informative) Bibliography25 ISO13350:1999(E) iii Forewo

11、rd ISO (the InternationalOrganizationforStandardization)isaworldwidefederationofnationalstandardsbodies(ISO memberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnical committees.Eachmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhas ther

12、ighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnongovernmental,in liaisonwithISO,alsotakepartinthework.ISOcollaboratescloselywiththeInternationalElectrotechnical Commission(IEC)onallmattersofelectrotechnicalstandardization. DraftInternationalStandardsadoptedbythetechnic

13、alcommitteesarecirculatedtoth ememberbodiesforvoting. PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote. InternationalStandardISO13350waspreparedbyTechnicalCommitteeISO/TC117, Industrialfans . AnnexesA,B,CandDofthisInternationalStandardareforinformationonl

14、y.ISO13350:1999(E) iv Introduction Theneedforthisnewstandardhasbeenevidentforsometime.Theuseofthesocalledjetfantoassist in controlling the quality of air in vehicleandtraintunnelshasbecomeincreasinglypopular.Thelongitudinalmethodof ventilationcanshowadvantagesininitialcostandrunningcostcomparedtoalt

15、ernativ e systems, and smoke control inemergencyconditionscanbereadilyprovided.Atpresent,thereisnopublishednationalorinternationa l standard fortheperformancetestingofjetfans. ThisInternationalStandard,whichformspartoftheISO/TC117seriesoffanstandards,deals withthe determination of those performance

16、criteria essential to the correctapplicationofjetfans.Indescribingthetestand ratingprocedures,numerousreferencesaremadetoISO5801aswellastootherrelevantInternationalStandards.INTERNATIONALSTANDARD ISO13350:1999(E) 1 IndustrialfansPerformancetestingofjetfans 1Scope ThisInternationalStandarddealswithth

17、edeterminationofthosetechnicalcharacteristicsneededtodescribeall aspectsoftheperformanceofjetfansasdefinedinISO13349.Itdoesnotcoverthosefansdesignedforducted applications,northosedesignedsolelyforaircirculation,e.g.ceilingfansandtablefans. ThetestproceduresdescribedinthisInternationalStandar drelate

18、tolaboratoryconditions.Themeasurementof performanceunderonsiteconditionsisnotincluded. 2Normativereferences Thefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthis InternationalStandard.Atthetimeofpublication,theeditionsindicatedwerevalid.Allstandardsaresubj

19、ectto revision,andpartiestoagreementsbasedonthisInternationalStandardareencouragedtoinvestigat ethe possibilityofapplyingthemostrecenteditionsofthestandardsindicatedbelow .MemberofIECandISOmaintain registersforcurrentlyvalidInternationalStandards. ISO19401:1986, MechanicalvibrationBalancequalityrequ

20、irementsofrigidrotorsPart1:Determinationof permissibleresidualunbalance . ISO5801:1997, IndustrialfansPerformancetestingusingstandardizedairways . ISO13347: 1) ,IndustrialfansDeterminationoffansoundpowerlevelunderstandardizedlaboratory conditions. ISO13349: 1) , IndustrialfansVocabularyanddefinition

21、sofcategories. ISO14695: 1) , IndustrialfansVibrationmeasurementmethod. IEC600342:1972, RotatingelectricalmachinesPart2:Methodsfordetermininglossesandefficiencyofrotating electricalmachineryfromtests(excludingmachinesfortractionvehicules). IEC6003414:1996, RotatingelectricalmachinesPart14:Mechanical

22、vibrationofcertainmachineswithshaft heights56mmandhigherMeasurement,evaluationandlimitsofthevibrationseverity. 1) Tobepublished.ISO13350:1999(E) 2 3Definitions ForthepurposesofthisInternationalStandard,thedefinitionsgiveninISO13349,ISO 5801andthefollowing apply. 3.1 effectivefandynamicpressure p d c

23、onventionalquantityrepresentativeofthedynamiccomponentofthefanoutput,calculated ,intheparticularcase ofajetfan,fromtheeffectivefanoutletvelocityandtheinletdensity NOTE Theeffectivefandynamicpressurewillnotbethesameastheaverageofthedynamicpressuresacrossthe sectionbecauseitexcludesfromconsiderationth

24、atpartofthedyna micenergyfluxwhichisdueonlyt odeparturesfrom uniformaxialvelocitydistribution. 3.2 effectivefanoutletarea A eff intheparticularcaseofajetfan,outletareawithdeductionsformotors,fairingsorotherobstructions NOTE 1 Ifthesilencercentrebodyreachestheoutletplaneofthefan,thentheeffectivefanou

25、tletareaisdefinedasthe annulusareaatthefanoutletplaneasshowninfigure1a). NOTE 2 If the fan hasa silencer without centrebody see figure 1 b),theeffectivefanoutletareawillbeclosetothecross sectionalareainsidethesilencerinordertoclearanyexitbellmouthform. NOTE3 Ifthecentrebody(motororsilencercore)doesn

26、otextendtotheoutletplane,th eeffectivefanoutletareawill approach the annulus area between the casingandthe motor,butwithso meincrease,asdefinedinfigure1c),forthedistance betweenthecentrebodyandtheoutlet.Wherethemotorisontheupstreamside,figure1c)isappliedt o the impeller hub rather thanthemotor,asill

27、ustrated. Figure1Effectivefanoutletarea 3.3 effectivefanoutletvelocity v eff calculatedfromthethrust,theinletdensityandtheeffectivefanoutletareaasdetailedin11.2 3.4 fanoutletvelocity intheparticularcaseofajetfan,inletvolumeflowdividedbyeffectivefanoutletarea, A eff 3.5 fanairpower conventional power

28、 output; in theparticularcaseofajetfan,productofinletvolumeflowandeffectivefandynamic pressure ISO13350:1999(E) 3 3.6 impellertipspeed u peripheralspeedoftheimpellerbladetips 3.7 thrust T m , T c fanthrustmeasuredorcalculatedinaccordancewiththisInternationalStandard 3.8 thrust/powerratio r t thrustd

29、ividedbyimpellerpower NOTE Analternativedefinitionofthrust/powerratiowhichhassometimesbeenused:thrustdividedbymotorinpu t power. Thisdefinitionisdeprecated,asitwillvaryaccordingtothe motormanufacturerused.Italsoresultsinalowe rvalue,asthe motorlossesareincluded. 3.9 fanguard guard designed to preven

30、t the ingestion of relatively largeforeignbodies,suchasdrinkcans,andsometimesfitted totheinletandoutletofjetfans NOTE Guardscanhavea markedeffectonthethrustperfor manceandnoiselevel.Wher etheyarespecified, measurementsshouldbemadewiththeseguardsinplace. 3.10 chamber airwayinwhichtheairvelocityissmal

31、lcomparedwiththatatthefaninletoroutlet 3.11 testenclosure room,orotherspaceprotectedfromdraught,inwhichthefanandtestairwaysaresituated 3.12 impellerbalancegrade gradeGasspecifiedinISO19401 3.13 fanvibrationvelocity unfilteredr.m.s.vibrationvelocityoverthefrequencyrange10Hzto10kHzmeasuredinaccordance

32、withthis InternationalStandardandwithISO14695 3.14 fanimpellerefficiency h R fanairpowerdividedbyimpellerpower 3.15 overallefficiency h E fanairpowerdividedbymotorinputpower 3.16 soundpressurelevel L p tentimesthelogarithmtothebase10oftheratioofthesquareofthesoundpressure radiated by the sound sourc

33、e undertesttothesquareofthereferencesoundpressureISO13350:1999(E) 4 3.17 soundpowerlevel L w tentimesthelogarithmtothebase10oftheratioofthesoun d power radiated by the sound source under test to the referencesoundpower 3.18 inletsoundpowerlevel L w1 soundpowerlevelofthefandeterminedatthefaninlet 3.1

34、9 outletsoundpowerlevel L w2 soundpowerlevelofthefandeterminedatthefanoutlet 3.20 frequencyrangeofinterest forgeneralpurposes,thefrequencyrangeincludingtheoctavebandswithcentrefrequenciesbetween6 3 Hzand 8000Hzandtheonethirdoctavebandswithcentrefrequenciesbetween50Hzand10000Hz 4Symbolsandabbreviatio

35、ns Thefollowingsymbolsandunitsshallapplyfortheparameterslisted. Parameter Symbol Unit Effectivefanoutletarea A eff m 2 Nominalfandiameter D R m Lengthofupstreamchamberside D 3 m Soundpressurelevel L p dB(ref.20 m Pa) Soundpowerlevel L w dB(ref.1pW) Inletsoundpowerlevel L w1 dB(ref.1pW) Outletsoundpo

36、werlevel L w2 dB(ref.1pW) rotationalspeed N r/s Differentialpressureacrossaflowmeasuringdevice p P a Effectivefandynamicpressure p d P a Volumeflow q V m 3 /s Impellerbalancegrade(ISO19401) G m m Thrust/powerratio r t N/kW Calculatedthrust T c N Measuredthrust T m N Impellertipspeed(see3.6) u m/s Ef

37、fectivefanoutletvelocity v eff m/s Meanthroughflowvelocityinatunnelataspecifiedsection v t m/s Inletdensitytakenasequaltothedensityinthetestenclosure r a kg/m 3 Overallefficiency h E Motorefficiency h M Fanimpellerefficiency h R ISO13350:1999(E) 5 5Characteristicstobemeasured 5.1General Inorderthata

38、jettypefanbecorrectlyappliedandgivesatisfactoryperformanceandreliabilityinservice,i tis necessary to determinea number of technical performancecharacteristicsinadditiontoknowingthemoreobvious mechanicalfeaturessuchasmass,overalldimensionsandinstallationdimensions. 5.2Thrust Frictiononthetunnelwalls,

39、inletandoutletlossesandsometimestrafficdrag,combinedwithclimaticeffectsat tunnelportals,createapressuredropthroughthetunnel.Thepressure drop is matched by the sum of the pressure increasesbythejetfansduetothemomentumtransferbetweenfandischargeairflowandairflowinthetunnel . As it isimpossibletomeasur

40、ethemomentumofthefandischargeairflow,andth e rate of change in momentum is equal andoppositetothethrust,thrustismeasuredinstead. 5.3Inputpower Inordertocalculatethecostofoperatingthejetfansinatunnel,andtheremaybeasubstantialnumber,i tis necessarytoknowtheinputpowertothefanmotor. 5.4Soundlevels Sound

41、 levels, usuallyatinletandoutlet,areestablishedinordertoensurethatthejetfanandsilencercombination isoptimizedtomatchthetunnelsoundlevelrequirements. NOTE Thefanmanufacturercanonlyguaranteethesoundpowerlevelofthefan.Thesoundpressureinthetunnelwill dependonthesizeandsoundabsorptioncharacteristicsofthe

42、tunnel,whichareoutsidethefanmanufacturersresponsibility. 5.5Vibrationvelocity Forreasonsofsafety,reliabilityandmaintainability,itisessentialthatarealisticvibrationvelocityisspecifiedand recordedontunnelfans.TheseshallbemeasuredatthesupportpointsinaccordancewithISO14695. 5.6Volumeflowrate Volumeflowr

43、ateneedonlybemeasuredifrequiredforcontractualreasons.Itistheeffectivefanoutletvelocity whichisusedtoevaluatetheoptimumnumber,sizeandspacingofjetfansinatunnel ,andiscalculatedin accordancewith11.2. 6Instrumentationandmeasurements 6.1Dimensionsandareas Themeasurementofdimensionsandthedeterminationofareasshallb einaccordancewithclause10ofISO 5801:1997. 6.2Rotationalspeed Therotationalspeedoftheimpellershallbedeterminedinaccordancewithclause8ofISO5801:1997. 6.3Thrust 6.3.1 Forcebalancesystems Bytheuseofca libratedweights,forceba lancesystemssha llpermitthedeterminationofforce