1、BRITISH STANDARD BS EN 12412-2:2003 Thermal performance of windows, doors and shutters Determination of thermal transmittance by hot box method Part 2: Frames The European Standard EN 12412-2:2003 has the status of a British Standard ICS 91.060.50 BS EN 12412-2:2003 This British Standard, was publis
2、hed under the authority of the Standards Policy and Strategy Committee on 20 August 2003 BSI 20 August 2003 ISBN 0 580 42481 2 National foreword This British Standard is the official English language version of EN 12412-2:2003. The UK participation in its preparation was entrusted by Technical Commi
3、ttee B/540, Energy performance of materials, components and buildings, to Subcommittee B/540/1, European Standards for thermal insulation, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The Briti
4、sh Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Onli
5、ne. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsib
6、le international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover,
7、the EN title page, pages 2 to 42, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN124122 July2003 ICS91.0
8、60.50 Englishversion Thermalperformanceofwindows,doorsandshutters DeterminationofthermaltransmittancebyhotboxmethodPart 2:Frames Performancethermiquedesfentres,portesetfermetures Dterminationducoefficientdetransmissionthermiquepar lamthodedelabotechaudePartie2:Encadrements WrmetechnischesVerhaltenvo
9、nFenstern,Trenund AbschlssenBestimmungdes Wrmedurchgangskoeffizientenmittelsdes HeizkastenverfahrensTeil2:Rahmen ThisEuropeanStandardwasapprovedbyCENon2May2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanation
10、alstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresp
11、onsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Sl
12、ovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN124122:
13、2003EEN124122:2003(E) 2 Contents Foreword . 3 Introduction. 4 1 Scope 4 2 Normativereferences 4 3 Terms,definitions,symbols,unitsandsubscripts . 5 4 Principle . 6 5 Requirementsfortestspecimenandapparatus 6 5.1 General . 6 5.2 Surroundpanels. . 6 5.3 Specimenrequirementsandlocation . 6 5.3.1 Complet
14、eframesforwindowsanddoors. 6 5.3.2 Frameandsash,transomormullionprofilesections. 9 5.4 Calibrationpanels . 11 5.5 Temperaturemeasurementandbafflepositions . 11 6 Testprocedure . 13 6.1 General . 13 6.2 Calibrationmeasurements . 13 6.2.1 General . 13 6.2.2 Totalsurfaceresistance . 14 6.2.3 Surfaceres
15、istancesandsurfacecoefficientsofheattransfer. 15 6.2.4 Surroundpanelandedgeeffects . . 16 6.3 Measurementprocedurefortestspecimens 17 7 Testreport. . 19 AnnexA (normative) Determinationofenvironmentaltemperature . 21 A.1 General . 21 A.2 Environmentaltemperature. . 22 A.3 Meanradianttemperature 22 A
16、4 Convectivesurfaceheattransfercoefficient . 23 AnnexB (normative) Linearthermaltransmittanceoftheedgezone 25 AnnexC (informative) Exampleofcalibrationtestandmeasurementofframespecimen. 32 C.1 Calibrationtestwithpanelsize1,23m 1,48m 32 C.2 Framespecimenmeasurement 38EN124122:2003(E) 3 Foreword This
17、documentEN124122:2003hasbeenpreparedbyTechnicalCommitteeCEN/TC89,“Thermalperformance ofbuildingsandbuildingcomponents“thesecretariatofwhichisheldbySIS. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyJanuary2004,andconfli
18、ctingnationalstandardsshallbewithdrawnatthelatestby January2004. Thisstandardisoneofaseriesofstandardsoncalculationandmeasurementmethodsforthedesignand evaluationofthethermalperformanceofbuildingsandbuildingcomponents. AnnexesAandBarenormative.AnnexCisinformative. AccordingtotheCEN/CENELECInternalRe
19、gulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKin
20、gdom.EN124122:2003(E) 4 Introduction ThemethodgiveninthisEuropeanStandardprovidesdataonframesthatcanbeusedincalculationsoftheoverall thermalperformanceofwindowsanddoorsaccordingtoENISO100771, Thermalperformanceofwindows,doors andshuttersCalculationofthermaltransmittancePart1:Simplifiedmethod (ISO100
21、771). 1Scope ThisEuropeanStandardspecifiesamethod,basedonENISO8990andENISO125671,tomeasurethethermal transmittanceofframeandsashcomponentsofwindowsanddoors,includingmullionsandtransoms. Thethermalbridgingeffectofwindowordoorcomponents(handles,hinges,closingdevices,etc.)isincluded. Thetestprocedureis
22、designedtotakeintoaccountthewholedevelopedareaoftheframeorsashsurface,but excludestheinfluenceofthethermalbridgeintroducedthroughthespacerinsealedglazingunits. Edgeeffectsoccurringoutsideoftheperimeterofthespecimenareexcluded.Furthermore,energytransferdueto solarradiationisnottakenintoaccount,andair
23、leakageisexcluded. Themeasurementsareperformedunderdefinedconditionstofacilitatethecomparisonofmeasuredvalues. InformationonthedesignofthecalibrationtransferstandardisgiveninENISO125671. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.T
24、hese normativereferencesarecitedattheappropriateplacesinthetext,andthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe public
25、ationreferredtoapplies(includingamendments). EN19464, ThermalperformanceofbuildingproductsandcomponentsSpecificcriteriafortheassessmentof laboratoriesmeasuringheattransferpropertiesPart4:Measurementsbyhotboxmethods. prEN12519:1996 : , WindowsanddoorsTerminology. EN12664, Thermalperformanceofbuilding
26、materialsandproductsDeterminationofthermalresistancebymeans ofguardedhotplateandheatflowmetermethodsDryandmoistproductsofmediumandlowthermalresistance. ENISO7345:1995, ThermalinsulationPhysicalquantitiesanddefinitions(ISO7345:1987). ENISO8990:1996, ThermalinsulationDeterminationofsteadystatethermalt
27、ransmissionpropertiesCalibrated andguardedhotbox(ISO8990:1994). ENISO9288:1996, ThermalinsulationHeattransferbyradiationPhysicalquantitiesanddefinitions (ISO9288:1989). ENISO125671:2000, ThermalperformanceofwindowsanddoorsDeterminationofthermaltransmittancebyhot boxmethodPart1:Completewindowsanddoor
28、s(ISO125671:2000).EN124122:2003(E) 5 3 Terms,definitions,symbols,unitsandsubscripts 3.1 Termsanddefinitions ForthepurposesofthisEuropeanStandard,thetermsanddefinitionsgiveninprEN 12519:1996, ENISO7345:1995,ENISO8990:1996andENISO9288:1996apply. 3.2 Symbolsandunits Symbol Quantity Unit A area m 2 d th
29、icknessordepth m F fraction - f viewfactor - H height m h surfacecoefficientofheattransfer W/(m 2 K) L perimeterlength m l length m q densityofheatflowrate W/m 2 R thermalresistance m 2 K/W T thermodynamictemperature K D T, D q temperaturedifference K U thermaltransmittance W/(m 2 K) v airvelocity m
30、/s w width m a radiationfactor - e hemisphericalemissivity - q Celsiustemperature C L thermalconductance W/(m 2 K) l thermalconductivity W/(m K) s StefanBoltzmannconstant W/(m 2 K 4 ) F heatflowrate W Y linearthermaltransmittance W/(m K) 3.3Subscripts b baffle c convection(air) ca calibration e exte
31、rnal,usuallycoldside ed edgezone f frame fi infillwithknownthermalpropertiesEN124122:2003(E) 6 hb hotbox i internal,usuallywarmside in input m measured me average/mean n environmental(ambient) ne environmental(ambientexternal) ni environmental(ambientinternal) p revealofsurroundpanel r radiation(mea
32、n) s surface sp specimen sur surroundpanel t total 4Principle Thethermaltransmittanceofaframeisdetermineddirectlybymeasurementunderstandardisedconditionsusing thecalibratedorguardedhotboxmethodaccordingtoENISO8 990andENISO125671.Therequirementsof ENISO8990shallbecompliedwithinadditiontothosegivenint
33、hisstandard.Themethodmaybeappliedto completewindowordoorframes(see5.3.1)ortoprofilesectionsincludingmullions,transomsetc.(see5.3.2). Thesurroundpanelisusedtokeepthespecimeninagivenposition.Itisconstructedwithouterdimensionsof appropriatesizefortheapparatus,havinganaperturetoaccommodatethespecimen(se
34、eFigures1to5). Theprincipalheatflowsthroughthesurroundpanelandthecalibrationpanel(ortestspecimen)areshowninFigure 8.Theboundaryedgeheatflowduetothelocationofthecalibrationpanelinthesurroundpanelisdetermined separatelyasalinearthermaltransmittance, Y . Theprocedureinthisstandardincludesacorrectionfor
35、theboundaryedgeheatflow,sothatstandardizedand reproduciblethermaltransmittancepropertiesareobtained. Themagnitudeoftheboundaryedgeheatflowasafunctionofgeometry,calibrationpanelthicknessandthermal conductivityisdeterminedbytabulatedvaluesgivenENISO1 25671:2000,annexB. 5 Requirementsfortestspecimenand
36、apparatus 5.1General ThetestapparatusshallconformtotherequirementsspecifiedinEN19464,ENISO8990andENISO125671. 5.2Surround panels FordetailsseeENISO125671:2000,5.2. 5.3 Specimenrequirementsandlocation 5.3.1 Completeframesforwindowsanddoors Specimensizesshouldberepresentative(typical)ofthosefoundinpra
37、ctice.Forstandardisedtestsonwindow framestheoverallsizesrecommendedare1230mm(width)by1480mm(height).Furtherrequirementsarelaid downinENISO125671:2000,5.3.EN124122:2003(E) 7 Toensureconsistencyofmeasurement,thespecimenshallbelocatedasfollows.Thespecimenwithpanelshallfill thesurroundpanelaperture,whic
38、hshallbelocatedcentrally.Theinternalframefaceshallbeasclosetothefaceof thesurroundpanelaspossible,butnopartshallprojectbeyondthesurroundpanelfacesoneitherthecoldorwarm sides(seeFigures1,2and3). Dimensionsinmillimetres Key 1 Infillelementofinsulatingmaterial 2 Adhesivetape 3 Aperture 4W a r m s i d e
39、 5 Coldside Figure1Mountingofspecimenintheaperture - MetalframeEN124122:2003(E) 8 Dimensionsinmillimetres Key 1 Infillelementofinsulatingmaterial 2 Adhesivetape 3 Aperture 4W a r m s i d e 5 Coldside Figure2Mountingofspecimenintheaperture - PVCframeEN124122:2003(E) 9 Dimensionsinmillimetres Key 1 In
40、fillelementofinsulatingmaterial 2 Adhesivetape 3 Aperture 4W a r m s i d e 5 Coldside Figure3Mountingofthespecimenintheaperture - Woodframe Theapertureshouldbeatleast200mmfromtheinsidesurfacesofthecoldandhotboxestoavoidorlimitedge heatflowcorrections,andtoallowroomfortheguardedhotbox(whereapplicable
41、). Anyglazingoropaqueinfillpanelsinwindowsanddoorsshallbereplacedbyinsulatingpanels(seeFigures1,2 and3).Thermocouplestomeasurethesurfacetemperatureontheinfillinsulationshallbeplacedasshownin Figure6. Allsurroundpanelthermocouplesshouldbelocatedcentrally(seeFigure6). ForfurtherinformationseeENISO1256
42、71. 5.3.2 Frameandsash,transomormullionprofilesections Theframe,mullionortransomofawindowordoorsystemshallbeinstalledverticallyinthesurroundpanel aperture.Theinternalspecimenfaceshallbeasclosetothefaceofthesurroundpanelaspossible,butnopart shallprojectbeyondthesurroundpanelfacesoneitherthecoldorwarm
43、sides(seeFigure4).EN124122:2003(E) 10 Dimensionsinmillimetres Key 1 Adhesivetape 2 Infillelementofinsulatingmaterial 3 Projectedarea A t oftheframeandinfillinsulation 4W a r m s i d e 5 Coldside Figure4Combinationofsashesandframes Theframearea, A f ,isthelargerofthetwoprojectedareasseenfrombothsides
44、 Thelengthoftheprofilesectionsshouldbe1480mm. Ifthespecimensusuallyformpartofacombinationofseveralframeprofiles,e.g.sashandframe,thecomplete unitsshallbetested,inclusiveofanyhinges,seals,etc. Thesashandframeprofilesectionsshallbeconnectedwithatleasttwohinges.Additionally,theprofilesections shallbefixedwithoutcaus
