BS EN 12664-2001 Thermal performance of building materials and products - Determination of thermal resistance by means of guarded hot plate and heat flow meter methods - Dry and moe.pdf

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1、BRITISH STANDARD BS EN 12664:2001 Incorporating Corrigendum No. 1 Thermal performance of building materials and products Determination of thermal resistance by means of guarded hot plate and heat flow meter methods Dry and moist products of medium and low thermal resistance The European Standard EN

2、12664:2001 has the status of a British Standard ICS 91.100.01; 91.120.10 BS EN 12664:2001 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 2001 BSI 20 De

3、cember 2002 ISBN 0 580 36513 1 National foreword This British Standard is the official English language version of EN 12664:2001. This British Standard together with BS EN 12667:2001 and BS EN 12939:2001 supersedes BS 874-2.1:1986 and BS 874-2.2:1988 which are withdrawn. The UK participation in its

4、preparation was entrusted by Technical Committee RHE/9, Thermal insulating materials, to Subcommittee RHE/9/2, Thermal properties of insulating materials, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-refe

5、rences The British 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 Britis

6、h Standards Online. 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

7、to the responsible 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

8、, the EN title page, pages 2 to 72, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14031 Corrigendum No. 1 20 December 2002 Addition of supersession detai

9、ls to national forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12664 January 2001 ICS 91.100.01; 91.120.10 English version Thermal performance of building materials and products Determination of thermal resistance by means of guarded hot plate and heat flow meter methods Dry and moist p

10、roducts of medium and low thermal resistance Performance thermique des matriaux et produits pour le btiment Dtermination de la rsistance thermique par la mthode de la plaque chaude garde et la mthode fluxmtrique Produits secs et humides de moyenne et basse rsistance thermique Wrmetechnisches Verhalt

11、en von Baustoffen und Bauprodukten Bestimmung des Wrmedurchlasswiderstandes nach dem Verfahren mit dem Plattengert und dem Wrmestrommessplatten-Gert Trockene und feuchte Produkte mit mittlerem und niedrigem Wrmedurchlasswiderstand This European Standard was approved by CEN on 25 June 2000. CEN membe

12、rs are bound to comply with the CEN/CENELEC Internal Regulations which stipulate 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 applicatio

13、n to the Management Centre or to any CEN member. This European Standard 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 Management Centre has the same s

14、tatus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STAN

15、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12664:2001 EPage 2 EN 12664:2001 BSI 20 December

16、2002 Contents Page Foreword. 3 Introduction 4 1S c o p e . 5 2 Normative references. 6 3 Definitions, symbols and units 7 4 Principle 9 5 Apparatus . 10 6 Test specimens 16 7 Testing procedure 20 8 Calculations 28 9 Test report 32 Annex A (normative) Limitations to the implementation of the measurem

17、ent principle and on measurable properties 34 Annex B (normative) Limits for equipment performance and test conditions Guarded hot plate 49 Annex C (normative) Limits for equipment performance and test conditions Heat flow meter 54 Annex D (normative) Equipment design 59 Annex E (normative) Procedur

18、es related to measurements at moisture equilibrium. 66 Annex F (informative) Conditioning to a specified moisture content in a specified atmosphere 69 Annex G (informative) Estimation of effects of condensation . 71 Bibliography . 72Page 3 EN 12664:2001 BSI 20 December 2002 Foreword This European St

19、andard has been prepared by Technical Committee CEN/TC 89, Thermal performance of buildings and building components, 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

20、latest by July 2001, and conflicting national standards shall be withdrawn at the latest by December 2001. This document is one of a series of standards on thermal test methods that support product standards for building materials. The annexes A, B, C, D and E are normative. The annexes F and G are

21、informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands

22、, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 4 EN 12664:2001 BSI 20 December 2002 Introduction Steady state heat transfer properties may be measured by a number of standardized test methods: the choice of the most appropriate method depends on specimen characteristics.

23、This standard covers the guarded hot plate and the heat flow meter methods only. For routine testing, the operator of these two methods needs only this standard and the relevant product standard, which may impose additional requirements related to specimen preparation or testing conditions. Detailed

24、 requirements for measurements in any testing condition of thermal resistance of any compatible plane specimen are given: for the guarded hot plate method, in ISO 8302:1991 and EN 1946-2:1999; for the heat flow meter method, in ISO 8301:1991 and EN 1946-3:1999. This standard provides general informa

25、tion on the apparatus, all mandatory limits for the equipment design and operation, and the specification of testing procedure, for dry and moist specimens, with medium and low thermal resistance, described in relevant technical specifications (e.g. a European product standard or a European technica

26、l approval). The information given is technically equivalent to that in ISO 8301:1991 and ISO 8302:1991, for both these methods. It is only intended for the routine testing of specimens (within the limitations of thickness and inhomogeneity, etc. given in annex A) using equipment which has been cons

27、tructed according to 5.1 and which has already been validated according to EN 1946-3:1999 or EN 1946-2:1999. It also includes examples of equipment designs that meet the requirements of 5.1, so that the assessment of the accuracy of an equipment designed accordingly does not need an error analysis b

28、ut only the equipment performance check. Although this standard can be used for testing dry specimens of high and medium thermal resistance, i.e. on products having a thermal resistance of not less than 0,5 m 2 K/W, the simpler procedures of EN 12667:2001 are recommended for such specimens. Measurem

29、ents on thick products of high and medium thermal resistance are covered in EN 12939, see the Bibliography.Page 5 EN 12664:2001 BSI 20 December 2002 1S c o p e This standard specifies principles and testing procedures for determining, by means of the guarded hot plate or heat flow meter methods, the

30、 thermal resistance of test specimens either in the dry state or conditioned to equilibrium with moist air, having a thermal resistance of not less than 0,1 m 2 K/W and a (hygro)thermal transmissivity or thermal conductivity up to 2,0 W/(mK). (It is expected that the thermal resistance of most mason

31、ry specimen will be less than 0,5 m 2 K/W). NOTE 1 The lower limit for measurable thermal resistance is due to the effect of contact thermal resistances, which require special testing techniques described in this standard. Although this standard can be used for testing dry specimens of high and medi

32、um thermal resistance, i.e. on products having a thermal resistance of not less than 0,5 m 2 K/W, the simpler procedures of EN 12667:2001 are recommended for such specimens. It applies in principle to any mean test temperature, but the equipment design in annex D is essentially intended to operate b

33、etween a minimum cooling unit temperature of -100 C and maximum heating unit temperature of +100 C. NOTE 2 Limits to the mean test temperature are only imposed by the materials used in the apparatus construction and by ancillary equipment. It supplies additional limits for equipment performance and

34、test conditions. It does not supply general equipment design procedures, equipment error analysis, equipment performance check or the assessment of equipment accuracy. It supplies example designs of equipment complying with the requirements set down in this standard. This standard does not supply ge

35、neral guidance and background information (e.g. the heat transfer property to be reported, product-dependent specimen preparations, suggested materials for vapour- tight envelopes when testing moist specimens, procedures requiring multiple measurements, such as those to assess the effect of specimen

36、 non-homogeneities, those to test specimens whose thickness exceeds the apparatus capabilities, and those to assess the relevance of the thickness effect). Due to these limitations, this standard shall only be used in conjunction with the product standard relevant to the product to be tested. Althou

37、gh intended primarily for building materials, it may also be used for specimens of any material that conforms to the requirements specified. It may be used for specimens made from the core material of hollow masonry units but formed voids are not permitted in the specimen. This standard does not cov

38、er measurements on thick products of high and medium thermal resistance.Page 6 EN 12664:2001 BSI 20 December 2002 2 Normative references This standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the

39、 text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred applies (inclu

40、ding amendments). NOTE References to ISO 8301:1991 and ISO 8302:1991 do not cover the complete test methods, but are limited to such items as equipment design and performance check, not covered by European Standards or parts of them; references to ISO 8301:1991 or ISO 8302:1991 are not needed for ro

41、utine testing according to this standard. EN 1946-2:1999 Thermal performance of building products and components Specific criteria for the assessment of laboratories measuring heat transfer properties Part 2: Measurements by guarded hot plate method EN 1946-3:1999 Thermal performance of building pro

42、ducts and components Specific criteria for the assessment of laboratories measuring heat transfer properties Part 3: Measurements by heat flow meter method EN 12667:2001 Thermal performance of building materials and products Determination of thermal resistance by means of guarded hot plate and heat

43、flow meter methods Products of high and medium thermal resistance EN ISO 7345 Thermal insulation Physical quantities and definitions (ISO 7345:1987) EN ISO 9288 Thermal Insulation Heat transfer by radiation Physical quantities and definitions (ISO 9288:1989) EN ISO 9346 Thermal insulation Mass trans

44、fer Physical quantities and definitions (ISO 9346:1987) ISO 8301:1991 Thermal insulation Determination of steady-state thermal resistance and related properties Heat flow meter apparatus ISO 8302:1991 Thermal insulation Determination of steady-state thermal resistance and related properties Guarded

45、hot plate apparatusPage 7 EN 12664:2001 BSI 20 December 2002 3 Definitions, symbols and units 3.1 Terms and definitions For the purposes of this standard, the terms and definitions in EN ISO 7345, EN ISO 9288, EN ISO 9346 apply. Most relevant definitions for the measurement of heat transfer properti

46、es on medium and low thermal resistance products and the definition of hygrothermal transmissivity are to be found in A.2. 3.2 Symbols and units Symbol Quantity Unit A metering area measured on a selected isothermal surface m 2 A d area of the defect m 2 A m area of the metering section m 2 D w mois

47、ture diffusivity m 2 /s E temperature difference error in non-plane specimens - Fo Fouriers number - R thermal resistance m 2 K/W T transfer factor W/(mK) T 1 temperature of the warm surface of the specimen K T 2 temperature of the cold surface of the specimen K T m mean test temperature (usually (T

48、 1+ T 2 )/2) K V volume m 3 Z v moisture resistance s/m a moisture factor Wm 2 /(kgK) c specific heat capacity J/(kgK) d thickness; average thickness of a specimen m e edge temperature ratio - e h heat flow meter output voltage mV er p percent error due to phase changes - er d percent error due to n

49、on-uniform moisture distribution - f calibration factor of the heat flow meter W/(mVm 2 ) f r multiplying factor for measured thermal resistance - g density of moisture flow rate kg/(m 2 s) h e latent enthalpy of evaporation per mass J/kgPage 8 EN 12664:2001 BSI 20 December 2002 Symbol Quantity Unit m mass (of the specimen) kg q density of heat flow rate W/m 2 p deviation of the specimen surface from a true plane