【英文标准名称】:Acoustics-Determinationofsoundpowerradiatedintoaductbyfansandotherair-movingdevices-In-ductmethod
【原文标准名称】:声学.风机和其他风动设备辐射入管道中的声功率的测定.管道法
【标准号】:ISO5136-2003
【标准状态】:现行
【国别】:国际
【发布日期】:2003-04
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;声级;噪声(环境的);声学;噪声测量;声学试验;测定;定义;通风机;声强;导管风扇
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Definitions;Determination;Ductmethods;Ductedfans;Fans;Loudnesslevels;Measurement;Measuringresults;Measuringtechniques;Noise(environmental);Noisemeasurements;Powerlevels;Sound;Soundintensity;Soundlevel;Soundlevels;Soundpower;Testing;Ventilators;Volume(sound)
【摘要】:1GeneralThisInternationalStandardspecifiesamethodfortestingductedfansandotherair-movingdevicestodeterminethesoundpowerradiatedintoananechoicallyterminatedductontheinletand/oroutletsideoftheequipment.NOTE1Forthesakeofbrevity,wherevertheterm"fan"occursinthetext,itmeans"fanorotherair-movingdevice".Themethodisapplicabletofanswhichemitsteady,broad-band,narrow-bandanddiscrete-frequencysoundandtoairtemperaturesbetween-50℃and+70℃.Thetestductdiameterrangeisfrom0,15mto2m.Testmethodsforsmall(d<0,15m)andlarge(d>2m)testductsaredescribedintheinformativeAnnexesHandI,respectively.Themaximummeanflowvelocityatthemicrophoneheadforwhichthemethodissuitabledependsonthetypeofmicrophoneshieldused,andisasfollows:—foamball15m/s;—nosecone20m/s;—samplingtube40m/s.Abovethesevaluesthesuppressionofturbulentpressurefluctuationsbythemicrophoneshield(see3.9)maybeinsufficient.ItisexpectedthatsoundpowertestswillbeconductedinconjunctionwithairflowperformancetestsinaccordancewithISO5801.Theductingarrangementwillthereforenormallyincorporatea"star"typeflowstraightenerontheoutletsideofthefanwhichwillminimizeswirl(see7.3).Whereitispermissibletodeletethestraighteneras,forexample,withlargefanstoinstallationcategoryCaccordingtoISO5801:1997,themethodislimitedtoaswirlangleof15°(AnexampleofamethodfordeterminingtheangleofswirlisgiveninAnnexJ.)NOTE2TheinstallationcategoriesdefinedinISO5801implythatthefaniseitherductedontheoutletsideonly(categoryB),ontheinletsideonly(categoryC)oronbothsides(categoryD).2TypesofsoundsourceThemethoddescribedinthisInternationalStandardisapplicabletoasoundsourceinwhichafanisconnectedtoductsonatleastoneside.Itisalsoapplicabletootherfan/attenuatorcombinationsorequipmentincorporatingfanswhichcanbeconsideredas"blackboxes".ExamplesoffansandotherequipmentcoveredbythisInternationalStandardare—ductedcentrifugalfans,—ductedaxialflowfans,—ductedmixed-flowfans,—ductedair-handlingunits,—ducteddust-collectionunits,—ductedair-conditioningunits,and—ductedfurnaces.ThisInternationalStandardisalsoapplicabletootheraerodynamicsourcessuchasboxes,dampersandthrottledevicesprovidedthataquietairflowdeliveredbyanauxiliaryfanisavailable,andthesignal-to-noiseratioofsoundpressurestoturbulentpressurefluctuationsinthetestductisatleast6dB(see7.2.1).Analternativemethodtodeterminethesoundpowerleveloftheflow-generatednoiseofsuchaerodynamicsoundsources,whichdoesnotrequirethemeasurementofsoundpressureinaflowenvironment,isdescribedinISO7235.Themethodwasoriginallydevisedforthedeterminationoftheflownoiselevelofductedsilencers.Thesoundpowerisdeterminedinareverberationroomconnectedtothetestductviaatransitionelement.Inthecaseofductedfanswithcloselycoupledattenuators,thesignal-to-noiseratioofsoundpressurestoturbulentpressuresmaybeinsufficientwhenusingthein-ductmethod.ThereforethemethoddescribedinISO7235isrecommendedforsuchfan/attenuatorcombinations.ThisInternationalStandardisnotapplicabletonon-ductedfansorequipment.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;23_120
【页数】:68P;A4
【正文语种】:英语


【英文标准名称】:Sprinklersystemsforresidentialanddomesticoccupancies-Codeofpractice
【原文标准名称】:民用消防喷水系统.实施规范
【标准号】:BS9251-2005
【标准状态】:现行
【国别】:英国
【发布日期】:2005-01-31
【实施或试行日期】:2005-01-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:装配;阀门;住宅;带轮的房屋;管道配件;数学计算;家用的;额定值;流量计量;设计;给水;记录品(文献);消防喷水器;公寓;维护;消防设备;报警系统;组件;建筑物防火;检验;技术文件;泄漏试验;长度;温度;防火安全性;流量率;交付使用;色码;消防;管线;使用说明书;选址
【英文主题词】:installation;valves;houses;mobilebuildings;pipefittings;mathematicalcalculations;domestic;ratings;flowmeasurement;design;watersupply;records(documents);firesprinklers;flats;maintenance;firefightingequipment;alarmsystems;components;firesafetyinbuildings;inspection;technicaldocuments;leaktests;length;temperature;firesafety;flowrates;commissioning;colourcodes;firefighting;pipes;instructionsforuse;siting
【摘要】:ThisBritishStandardgivesrecommendationsforthedesign,installation,components,watersuppliesandbackflowprotection,commissioning,maintenanceandtestingoffiresprinklersystemsinstalledforlifesafetypurposeswithadditionalbenefitsforpropertyprotectioninresidentialanddomesticoccupancies.Residentialoccupancies,formultipleoccupation,notexceeding20minheight,includeapartments,residentialhomes,housesofmultipleoccupancy(HMOs),blocksofflats,boardinghouses,agedpersonshomes,nursinghomes,residentialrehabilitationaccommodationanddormitories.Domesticoccupanciesincludeindividualdwellinghouses,individualflats,maisonettesandtransportablehomes.NOTECareshouldbetakenparticularlywhenspecifyingresidentialsprinklersystemsthatthefire/fuelloadinginanygivenoccupancydoesnotexceedthatwhichwouldnormallybefoundinaresidentiallivingroom,kitchenandbedrooms.Ifthefire/fuelloadingisgreaterthanthatofaconventionalresidentialoccupancythenconsiderationshouldbegiventoinstallingasprinklerinstallationinaccordancewithBS5306-2/BSEN12845.Keyindicatorsofhighfireloadingincludesignificantvolumesofvideotapes,books,paperandinstitutionalcateringfacilities.
【中国标准分类号】:C84
【国际标准分类号】:13_220_20
【页数】:28P.;A4
【正文语种】:英语