【英文标准名称】:StandardTestMethodforAirflowCalibrationofFanPressurizationDevices
【原文标准名称】:风扇增压装置气流校正的标准试验方法
【标准号】:ASTME1258-1988(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:1988
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E06.41
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:air-leakagemeasurement;airflowcalibration;airflowmeasurement;buildingenvelopes;fandepressurizationdevices;Airpressuretesting--buildingconstructions/materials;Buildingenvelopes;Calibration--air/atmosphericanalysisinstruments;Chambernoz
【摘要】:Thefanpressurizationprocedureprovidesarelativelyfastevaluationoftheairtightnessofbuildingenvelopes.Inorderfortheaccuracyofthetestresultstobeknown,theairflowratemeasurementtechniqueofthefanpressurizationsystemmustbecalibrated.Thistestmethodisapplicabletofanpressurizationsystemsthatareinstalledinanopeninginthebuildingenvelope,asopposedtopressurizationtechniquesinvolvingthemechanicalventilationsystemofthebuilding.Thetechniqueofpressurizationtestingofbuildingsputsspecificrequirementsonthecalibrationoffanpressurizationsystems.Thecalibrationmustcovertherangeoffanpressuredifferences(approximately12.5to75Pa)thatisinducedduringpressurizationtests.Thecalibrationmustalsocoverarangeinfanairflowratescorrespondingtotherangeinbuildingsizeandairtightnessthatthefanpressurizationsystemwillencounterinthefield.Thefanpressurizationsystemmustbecalibratedinbothdirectionsofairflowusedtopressurizeanddepressurizeabuildingifthesystemairflowdirectionisreversible.Thesetwocalibrationscanbeconductedusingthevarioussetupsdescribedinthistestmethod;howeversomeofthesetupscanbecombinedsuchthatasinglecalibrationfacilitycanbeusedtocalibratethefaninbothdirections.Suchasinglesetupmayinvolvemovingthefanpressurizationsystemfromoneendofthechambertotheother,reversingtheorientationofthesystematthesameendofthechamber,oritmaynotrequiremovingthesystematall.Thecalibrationtechniqueisapplicabletothetwobasictypesoffanpressurizationsystemsinuse,r/mindoorsandsignaldoors.Forfanpressurizationsystemsthatoperateinmultiplerangesofairflowrate,thesystemmustbecalibratedineachrange.Thecalibrationtechniqueisintendedtoprovideacompletecalibrationofafanpressurizationsystem.Aftercalibratingseveralsystemsofanidenticalorsimilardesign,thefanairflowratemaybefoundtobeindependentofcertainparameterssuchasfanpressuredifference.Othersimplifyingrelationsbetweenfanairflowrateandfanspeedorfansignalmaybeobserved.Iftheserelationsareobserved,amanufacturerorothercalibratormaychoosetosimplifythecalibrationprocedurebyreducingthenumberofcalibrationpoints.Theuseoffanpressurizationsystemsinactualbuildingsintroducesadditionalfactorsthatmaycauseerrorsintheairflowratemeasurementthatarenotaccountedforbythecalibration.Thesefactorsincludeoperatorandweathereffectsandinterferencefrominternalpartitionsandotherobstructions.^1.1Thistestmethodcoverstheairflowmeasurementcalibrationtechniquesforfanpressurizationsystemsusedformeasuringairleakageratesthroughbuildingenvelopes.1.2ThistestmethodisapplicabletosystemsusedforairleakagemeasurementasdescribedinPracticeE779.1.3Thistestmethodinvolvestheinstallationofthefanpressurizationsysteminacalibrationchamber.Useofthefanpressurizationsysteminanactualbuildingmayintroduceadditionalerrorsintheairflowmeasurementduetooperatorinfluence,interferenceofinternalpartitionsandfurnishings,weathereffects,andotherfactors.1.4Theproperuseofthistestmethodrequiresaknowledgeoftheprinciplesofairflowandpressuremeasurement.1.5Thisstandardincludestwobasicprocedures,apreferredprocedure,basedonASHRAE51/AMCA210,andanoptionalprocedurebasedonanonstandardairflowmeasurementtechnique,commonlyusedbymanufacturersoffanpressurizationdevices,butwhichhasnotbeencomparedwithstandardairflowmeasurementtechniques.1.6Thisstandarddoesnotpu......
【中国标准分类号】:J72
【国际标准分类号】:23_120
【页数】:9P.;A4
【正文语种】:英语