BS-EN-13947-2006.pdf
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1、BRITISH STANDARD BS EN 13947:2006 Thermal performance of curtain walling Calculation of thermal transmittance The European Standard EN 13947:2006 has the status of a British Standard ICS 91.060.10; 91.120.10 ? BS EN 13947:2006 This British Standard was published under the authority of the Standards
2、Policy and Strategy Committee on 31 July 2007 BSI 2007 ISBN 978 0 580 56531 1 National foreword This British Standard is the UK implementation of EN 13947:2006. The UK participation in its preparation was entrusted to Technical Committee B/540, Energy performance of materials components and building
3、s. A list of organizations represented on this committee can be obtained on request to its secretary. 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 cannot confer immunity
4、from legal obligations. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13947 December 2006 ICS 91.060.10; 91.120.10 English Version Thermal performance of curtain walling - Calculation of thermal transmittance Performances thermiques de
5、s faades lgres - Calcul du coefficient de transmission thermique Wrmetechnisches Verhalten von Vorhangfassaden - Berechnung des Wrmedurchgangskoeffizienten This European Standard was approved by CEN on 9 November 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
6、tipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standar
7、d exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standar
8、ds bodies of Austria, Belgium, 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, Switzerland and United Kingdom. EUROPE
9、AN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13947:2006: E EN 13947:2006 (
10、E) 2 Contents Page 1 Scope 6 2 Normative references6 3 Terms and definitions, symbols and units7 3.1 Terms and definitions .7 3.2 Symbols and units.7 3.3 Subscripts 7 3.4 Superscripts.8 4 Geometrical characteristics8 4.1 Main principles.8 4.2 Developed areas and internal depth11 4.3 Boundaries of cu
11、rtain wall structures.11 4.3.1 General11 4.3.2 Boundaries of a representative reference element12 4.3.3 Curtain wall areas13 5 Cut-off planes and partitioning of thermal zones.14 5.1 Rules for thermal modelling.14 5.2 Cut-off planes of the geometrical model.14 6 Calculation of curtain wall transmitt
12、ance .14 6.1 Methodologies14 6.2 Single assessment method 15 6.2.1 Thermal transmittance of glazing units and panels (filling elements).15 6.2.2 Determination of the heat flow through filling element / mullion or transom / filling element connection .16 6.2.3 Determination of the overall thermal tra
13、nsmittance of a curtain wall (Ucw).20 6.3 Component assessment method.21 6.3.1 General21 6.3.2 Definition of areas21 6.3.3 Thermal transmittance of glazing units and panels (filling elements).24 6.3.4 Thermal transmittance of frames, mullions and transoms .24 6.3.5 Linear thermal transmittance .25 6
14、.4 Thermal transmittance of a curtain wall built of different elements.27 7 Input data28 8 Report .29 8.1 Section drawings.29 8.2 Overview drawing of the whole curtain wall element 29 8.3 Values used for calculation29 8.4 Presentation of results29 Annex A (informative) Guidance for calculating the t
15、hermal transmittance Ucw of curtain walling using the two methods.30 Annex B (informative) Linear thermal transmittance of junctions .31 Annex C (normative) A method for calculating the thermal effect of screws using a 2D numerical method and the procedures specified in EN ISO 10077-2 39 C.1 General
16、39 C.2 Calculation of the equivalent thermal conductivity of the screw s,eq.40 C.3 Consideration of screw heads and washers.40 Annex D (normative) Ventilated and unventilated air spaces.41 Unventilated air layer41 EN 13947:2006 (E) 3 Annex E (informative) Component method: Calculation example.44 E.1
17、 Data for examples44 E.2 Frames46 E.2.1 Definition and evaluation of areas.46 E.2.2 Evaluation of Uf values.47 E.3 Glazing units 48 E.3.1 Definition and evaluation of areas.48 E.3.2 Evaluation of Ug values48 E.3.3 Definition of lg and evaluation of g, m,f and t,f.48 E.4 Panels .49 E.4.1 Definition a
18、nd evaluation of areas.49 E.4.2 Evaluation of Up values49 E.4.3 Definition of lp and evaluation of the p values50 E.4.4 Calculation of a complete element 50 Annex F (informative) Single assessment method: Calculation example.51 F.1 General description of examples.51 F.2 Centre U-value of the glazing
19、 unit .52 F.3 Centre U-value of the spandrel panel52 F.4 U-values of thermal joints.52 F.5 Overall U-value of the curtain wall.53 EN 13947:2006 (E) 4 Foreword This document (EN 13947:2006) has been prepared by Technical Committee CEN/TC 89 “Thermal performance of buildings and building components”,
20、the secretariat of which is held by SIS. 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 June 2007, and conflicting national standards shall be withdrawn at the latest by June 2007. This European
21、Standard is one of a series of standards on calculation methods for the design and evaluation of the thermal performance of buildings and building components. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement thi
22、s European Standard: Austria, Belgium, 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, Switzerland and United Kingdom
23、. EN 13947:2006 (E) 5 Introduction The design and construction of curtain wall systems is complex. This European Standard specifies a procedure for calculating the thermal transmittance of curtain wall structures. Curtain walls often contain different kinds of materials, joined in different ways, an
24、d can exhibit numerous variations of geometrical shape. With such a complex structure, the likelihood of producing thermal bridges across the curtain wall envelope is quite high. The results of calculations, carried out following the procedures specified in this European Standard, can be used for co
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