1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 23993:2010Thermal insulation productsfor building equipment andindustrial installations Determination of designthermal conductivity (ISO23993:2008)BS EN ISO 23993:2010
2、BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 23993:2010. It is identical to ISO 23993:2008. It supersedes BS EN ISO 23993:2008 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/540, Energy performance of mate
3、rials components andbuildings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 71992 9ICS 2
4、7.220; 91.100.60; 91.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2010.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD
5、NORME EUROPENNE EUROPISCHE NORM EN ISO 23993 November 2010 ICS 27.220; 91.120.10; 91.100.60 Supersedes EN ISO 23993:2008English Version Thermal insulation products for building equipment and industrial installations - Determination of design thermal conductivity (ISO 23993:2008, Corrected version 20
6、09-10-01) Produits isolants thermiques pour lquipement du btiment et les installations industrielles - Dtermination de la conductivit thermique utile (ISO 23993:2008, Version corrige 2009-10-01) Wrmedmmung an betriebstechnischen Anlagen in der Industrie und der technischen Gebudeausrstung - Bestimmu
7、ng der Betriebswrmeleitfhigkeit (ISO 23993:2008, korrigierte Fassung 2009-10-01) This European Standard was approved by CEN on 11 October 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a n
8、ational standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A
9、version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cypru
10、s, 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. EUROPEAN COMMITTEE FOR STANDARDIZATION COM
11、IT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 23993:2010: EBS EN ISO 23993:2010EN ISO 23993:2010 (E) 3 Forew
12、ord The text of ISO 23993:2008, Corrected version 2009-10-01 has been prepared by Technical Committee ISO/TC 163 “Thermal performance and energy use in the built environment” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 23993:2010 by Technical Committ
13、ee 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 latest by May 2011, and conflicting national
14、standards shall be withdrawn at the latest by May 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN IS
15、O 23993:2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ic
16、eland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 23993:2008, Corrected version 2009-10-01 has been approved by CEN as a EN ISO 23993:2
17、010 without any modification. BS EN ISO 23993:2010ISO 23993:2008(E) ISO 2008 All rights reserved iiiContents Page Foreword iv Introduction . vi 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Symbols . 2 5 Determination of declared thermal conductivity . 2 6 Determination of the
18、design value of thermal conductivity . 3 7 Conversion of available data . 3 7.1 General. 3 7.2 Conversion factor for temperature difference . 4 7.3 Conversion factor for moisture . 4 7.4 Conversion factor for ageing. 5 7.5 Conversion factor for compression 5 7.6 Conversion factor for convection . 5
19、7.7 Conversion factor for thickness effect. 5 7.8 Conversion factor for regular joints . 5 7.9 Additional thermal conductivity for regularly insulation-related thermal bridges, e.g. spacers . 6 Annex A (normative) Conversion factors 8 Annex B (informative) Examples of determination of the design the
20、rmal conductivity . 20 Annex C (informative) Approximate values of conversion factors . 23 Bibliography . 31 BS EN ISO 23993:2010ISO 23993:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (
21、ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, go
22、vernmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IE
23、C Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the memb
24、er bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 23993 was prepared by the European Committee for Standardization (CEN)
25、Technical Committee CEN/TC 89, Thermal performance of buildings and building components, in collaboration with ISO Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 2, Calculation methods, in accordance with the Agreement on technical cooper
26、ation between ISO and CEN (Vienna Agreement). This International Standard is one of a series of standards on methods for the design and evaluation of the thermal performance of building equipment and industrial installations. This corrected version of ISO 23993:2008 incorporates the following correc
27、tions plus other minor editorial modifications. Clause 4: The following two rows have been added to the table: N number of spacers per square metre sqthermal conductivity per spacer per square metre W/(m.K) Clause 6: Equations (1) and (2) have been re-inserted: dF=+ (1) ma cdjCF F F FF FFF= (2) 7.9.
28、2.2: The calculations have been modified as follows (i.e. with the substitution of sq, the thermal conductivity per spacer per square metre, for i.e., with the deletion of “/spacers/m2” from the units): Spacers of steel in the form of a flat bar 30 mm 3 mm sq= 0,003 5 W/(mK) 40 mm 4 mm sq= 0,006 0 W
29、/(mK) 50 mm 5 mm sq= 0,008 5 W/(mK) BS EN ISO 23993:2010ISO 23993:2008(E) ISO 2008 All rights reserved vA new Equation (6) has been added to define the relationship between and sqand the original Equation (6) renumbered to Equation (7). 7.9.3: The units “W(mK)” have been corrected to “W/(mK)”. A.4.1
30、 (twice) and A.4.2 (twice): The term “specific” has been added to the definition of W, “specific airflow resistance.” Annex B: The additional subtitles and introductory text, “B.1 Insulation materials” and “B.2 Conditions” have been added. The line “Determination of the conversion factors and ” has
31、been restyled as B.3 and introductory text added. Table C.1: The vertical line separating the subheadings “calcium-magnesium silicate fibre” and “calcium silicate” and “microporous insulants” each from the subheading “Insulation” has been moved one column to the left, i.e. from between the pictures
32、for the two pipes to between the column “Application.” and the picture of the horizontal pipe (consistent with other similar rows such as that for “mineral wool”). Table C.1 (four times): The term “airflow resistance” has been replaced with the term “airflow resistivity”. BS EN ISO 23993:2010ISO 239
33、93:2008(E) vi ISO 2008 All rights reservedIntroduction The establishment of design values for thermal conductivity for the calculation of the thermal performance of insulation systems for building equipment and industrial installations requires a consideration of various possible influences affectin
34、g the thermal properties of the insulation products employed due to the operational conditions of any individual insulation system. Among these influences could be: the non-linearity of the thermal conductivity curve over the temperature range in which the insulant may be employed; the thickness eff
35、ect; the effect of moisture in the insulant; ageing effects, beyond those already incorporated in the declared value; special installation effects such as single- or multi-layered installation. In this International Standard, the conversion factors F, that need to be used in a variety of application
36、s for a variety of insulation products, are given and the principles and general equations as well as some guidance for the establishment of design values for the calculation of the thermal performance of insulation systems are described. The conversion factors valid for commonly employed insulation
37、 products are given in annexes. They are well established in some cases and for some materials. Where experience is lacking and conversion factors cannot be established accurately, they are given in the form of an “educated estimate” so that the calculation result will be on the safe side, i.e. the
38、calculated heat transfer will be greater than that actually occurring when the calculation has obeyed the rules of this International Standard. BS EN ISO 23993:2010INTERNATIONAL STANDARD ISO 23993:2008(E) ISO 2008 All rights reserved 1Thermal insulation products for building equipment and industrial
39、 installations Determination of design thermal conductivity 1 Scope This International Standard gives methods to calculate design thermal conductivities from declared thermal conductivities for the calculation of the thermal performance of building equipment and industrial installations. These metho
40、ds are valid for operating temperatures from 200 C to +800 C. The conversion factors, established for the different influences, are valid for the temperature ranges indicated in the relevant clauses or annexes. 2 Normative references The following referenced documents are indispensable for the appli
41、cation of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 7345, Thermal insulation Physical quantities and definitions ISO 8497, Thermal insulation Determination of stea
42、dy-state thermal transmission properties of thermal insulation for circular pipes ISO 9053, Acoustics Material for acoustical applications Determination of airflow resistance ISO 9229, Thermal insulation Vocabulary ISO 13787, Thermal insulation products for building equipment and industrial installa
43、tions Determination of declared thermal conductivity 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 7345, ISO 9229 and the following apply. 3.1 declared thermal conductivity value of the thermal conductivity of a material or product used for buildin
44、g equipment and industrial installations: based on measured data at reference conditions of temperature and humidity; given as a limit value, in accordance with the determination method in ISO 13787; corresponding to a reasonable expected service lifetime under normal conditions BS EN ISO 23993:2010
45、ISO 23993:2008(E) 2 ISO 2008 All rights reserved3.2 design thermal conductivity value of thermal conductivity of an insulation material or product under specific external and internal conditions which can be considered as typical of the performance of that material or product when incorporated in a
46、building equipment or industrial installation 4 Symbols Symbol Quantity Unit aCcompressibility coefficient m3/(kg.K) D internal diameter of the layer m d layer thickness m dgsystem thickness including air gap m F overall conversion factor for thermal conductivity Faageing conversion factor FCcompres
47、sion conversion factor Fcconvection conversion factor Fdthickness conversion factor fdthickness conversion coefficient Fjjoint factor Fmmoisture conversion factor fmoisture conversion coefficient volume by volume m3/m3Ftemperature difference conversion factor N number of spacers per square metre u m
48、oisture content mass by mass kg/kg Celsius temperature C ddeclared thermal conductivity W/(m.K) design thermal conductivity W/(m.K) integrated thermal conductivity W/(m.K) additional thermal conductivity due to thermal bridges, such as spacers, which are regular parts of the insulation W/(m.K) sqthe
49、rmal conductivity per spacer per square metre W/(m.K) apparent density kg/m3 moisture content volume by volume m3/m35 Determination of declared thermal conductivity Declared thermal conductivities shall be determined as given in ISO 13787. BS EN ISO 23993:2010ISO 23993:2008(E) ISO 2008 All rights reserved 3The product shall be described by its characteristics including a clear identification of the materials, the type of fa
