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1、BS EN ISO 13370:2007 ICS 91.120.10, NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Thermal performance of buildings Heat transfer via the ground Calculation methods (ISO 13370:2007) Incorporating Corrigendum 2009March Licensed CopyChinese University of Hong K
2、ong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 ember 2008 BSI 2009 ISBN 978 0 580 67102 9 Amendments/corrigenda issued since publication DateComments BS EN ISO 13370:2007 National foreword
3、This British Standard is the UK implementation of EN ISO 13370:2007. It supersedes BS EN ISO 13370:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/540, Energy performance of materials components and buildings. A list of organizations represente
4、d 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 from legal obligations. 1 Dec 31 Marc
5、h 2009 Correction to the missing ISO pages Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13370 December 2007 ICS 91.120.10Supersedes EN ISO 13370:1998 English Version Thermal performance of building
6、s - Heat transfer via the ground - Calculation methods (ISO 13370:2007) Performance thermique des btiments - Transfert de chaleur par le sol - Mthodes de calcul (ISO 13370:2007) Wrmetechnisches Verhalten von Gebuden - Wrmebertragung ber das Erdreich - Berechnungsverfahren (ISO 13370:2007) This Europ
7、ean Standard was approved by CEN on 7 December 2007. 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 national standard without any alteration. Up-to-date lists and bibliographical references co
8、ncerning such national standards may be obtained on application to the CEN 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
9、 own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit
10、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 20
11、07 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 13370:2007: E Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI EN ISO 13370:2007 (E) 3 Foreword This document (EN ISO 13370:2007) has b
12、een prepared by Technical Committee ISO/TC 163 “Thermal performance and energy use in the built environment“ in collaboration with 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
13、the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2008, and conflicting national standards shall be withdrawn at the latest by June 2008. Attention is drawn to the possibility that some of the elements of this document may be the s
14、ubject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 13370:1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to impleme
15、nt this European Standard: Austria, Belgium, Bulgaria, 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 an
16、d the United Kingdom. Endorsement notice The text of ISO 13370:2007 has been approved by CEN as a EN ISO 13370:2007 without any modification. BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI ISO 13370:2007(E) ISO 2007 All rights reserved
17、 iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms, definitions, symbols and units. 2 3.1 Terms and definitions. 2 3.2 Symbols and units 3 4 Methods of calculation. 3 5 Thermal properties . 4 5.1 Thermal properties of the ground. 4 5.2 Thermal properties of b
18、uilding materials. 5 5.3 Surface resistances 5 6 Internal temperature and climatic data. 5 6.1 Internal temperature. 5 6.2 Climatic data 5 7 Thermal transmittance and heat flow rate 6 7.1 Thermal transmittance . 6 7.2 Thermal bridges at edge of floor. 6 7.3 Calculation of heat flow rate 6 7.4 Effect
19、 of ground water 6 7.5 Special cases 7 8 Parameters used in the calculations 7 8.1 Characteristic dimension of floor . 7 8.2 Equivalent thickness 8 9 Calculation of thermal transmittances . 8 9.1 Slab-on-ground floor 8 9.2 Suspended floor 9 9.3 Heated basement 12 9.4 Unheated basement 14 9.5 Partly
20、heated basement . 14 Annex A (normative) Calculation of ground heat flow rate . 15 Annex B (normative) Slab-on-ground with edge insulation 20 Annex C (normative) Heat flow rates for individual rooms 24 Annex D (normative) Application to dynamic simulation programmes . 25 Annex E (normative) Ventilat
21、ion below suspended floors 26 Annex F (informative) Periodic heat transfer coefficients . 29 Annex G (informative) Thermal properties of the ground 33 Annex H (informative) The influence of flowing ground water 35 Annex I (informative) Slab-on-ground floor with an embedded heating or cooling system
22、37 Annex J (informative) Cold stores 38 Annex K (informative) Worked examples. 39 Bibliography. 48 BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI ISO 13370:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organiz
23、ation for Standardization) is a worldwide federation of national standards bodies (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
24、 has the right to be represented on that committee. International organizations, governmental 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. I
25、nternational Standards are drafted in accordance with the rules given in the ISO/IEC 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. Publ
26、ication as an International Standard requires approval by at least 75 % of the member 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
27、rights. ISO 13370 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 2, Calculation methods. This second edition cancels and replaces the first edition (ISO 13370:1998), which has been technically revised. The following princi
28、pal changes have been made to the first edition: Clause 4 contains a revised text to clarify the intention of the initial part of the former Annex A; the rest of the former Annex A is now contained in ISO 10211; 7.2 no longer contains a table of linear thermal transmittances: it is now recognized, a
29、s with other thermal bridging, that the wall/floor junction often needs to be calculated; 9.1 provides an alternative formula for well-insulated floors; 9.2 provides clarification for low-emissivity surfaces; Annex A contains formulae for cooling applications; Annex B has incorporated minor revision
30、s to the text for edge-insulated floors; Annex D has been revised; Annex F (formerly Annex C) has been changed to informative status. BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI ISO 13370:2007(E) ISO 2007 All rights reserved v Intro
31、duction This International Standard provides the means (in part) to assess the contribution that building products and services make to energy conservation and to the overall energy performance of buildings. In contrast with ISO 6946, which gives the method of calculation of the thermal transmittanc
32、e of building elements in contact with the external air, this International Standard deals with elements in thermal contact with the ground. The division between these two International Standards is at the level of the inside floor surface for slab-on-ground floors, suspended floors and unheated bas
33、ements, and at the level of the external ground surface for heated basements. In general, a term to allow for a thermal bridge associated with the wall/floor junction is included when assessing the total heat loss from a building using methods such as ISO 13789. The calculation of heat transfer thro
34、ugh the ground can be done by numerical calculations, which also allow analysis of thermal bridges, including wall/floor junctions, for assessment of minimum internal surface temperatures. In this International Standard, methods are provided which take account of the three-dimensional nature of the
35、heat flow in the ground below buildings. Thermal transmittances of floors give useful comparative values of the insulation properties of different floor constructions, and are used in building regulations in some countries for the limitation of heat losses through floors. Thermal transmittance, alth
36、ough defined for steady-state conditions, also relates average heat flow to average temperature difference. In the case of walls and roofs exposed to the external air, there are daily periodic variations in heat flow into and out of storage related to daily temperature variations, but this averages
37、out, and the daily average heat loss can be found from the thermal transmittance and daily average inside-to- outside temperature difference. For floors and basement walls in contact with the ground, however, the large thermal inertia of the ground results in periodic heat flows related to the annua
38、l cycle of internal and external temperatures. The steady-state heat flow is often a good approximation to the average heat flow over the heating season. In addition to the steady-state part, a detailed assessment of floor losses is obtained from annual periodic heat transfer coefficients related to
39、 the thermal capacity of the soil, as well as its thermal conductivity, together with the amplitude of annual variations in monthly mean temperature. Annex D provides a method for incorporating heat transfers to and from the ground into calculations undertaken at short time steps (e.g. one hour). Wo
40、rked examples illustrating the use of the methods in this International Standard are given in Annex K. BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20,
41、Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARD ISO 13370:2007(E) ISO 2007 All rights reserved 1 Thermal performance of buildings Heat transfer via the ground Calculation methods 1 Scope This International Standard provides methods of calculation of heat transfer coefficients and heat flow rates f
42、or building elements in thermal contact with the ground, including slab-on-ground floors, suspended floors and basements. It applies to building elements, or parts of them, below a horizontal plane in the bounding walls of the building situated for slab-on-ground floors, suspended floors and unheate
43、d basements, at the level of the inside floor surface; NOTE In some cases, external dimension systems define the boundary at the lower surface of the floor slab. for heated basements, at the level of the external ground surface. This International Standard includes calculation of the steady-state pa
44、rt of the heat transfer (the annual average rate of heat flow) and the part due to annual periodic variations in temperature (the seasonal variations of the heat flow rate about the annual average). These seasonal variations are obtained on a monthly basis and, except for the application to dynamic
45、simulation programmes in Annex D, this International Standard does not apply to shorter periods of time. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the
46、 latest edition of the referenced document (including any amendments) applies. ISO 6946, Building components and building elements Thermal resistance and thermal transmittance Calculation method ISO 7345, Thermal insulation Physical quantities and definitions ISO 10211, Thermal bridges in building c
47、onstruction Heat flows and surface temperatures Detailed calculations ISO 10456, Building materials and products Hygrothermal properties Tabulated design values and procedures for determining declared and design thermal values ISO 14683, Thermal bridges in building construction Linear thermal transm
48、ittance Simplified methods and default values BS EN ISO 13370:2007 Licensed CopyChinese University of Hong Kong, 11/04/2009 08:20, Uncontrolled Copy, (c) BSI ISO 13370:2007(E) 2 ISO 2007 All rights reserved 3 Terms, definitions, symbols and units 3.1 Terms and definitions For the purposes of this do
49、cument, the terms and definitions given in ISO 7345 and the following apply. 3.1.1 slab on ground floor construction directly on the ground over its whole area 3.1.2 suspended floor floor construction in which the lowest floor is held off the ground, resulting in an air void between the floor and the ground NOTE This air void, also called underfloor space or crawl space, may be ventilated or unventilated, and does not form part of the habitable space. 3.1.3 basement usable part of a building that is s
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