1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 13792:2012Thermal performance of buildings Calculation of internal temperatures of a r o o m i n s u m m e r w i t h o u t mechanical cooling Simplified methodsBS EN IS
2、O 13792:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 13792:2012. It supersedes BS EN ISO 13792:2005, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e B / 5 4 0 / 8 , M i r r o r c o m m i
3、 t t e e f o r I S O / T C 1 6 3 - Thermal Performance and Energy use in the built Environment.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 responsi
4、ble for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 67534 8 ICS 91.120.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards
5、 Policy and Strategy Committee on 30 April 2012.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 13792 March 2012 ICS 91.120.10 Supersedes EN ISO 13792:2005English Version Thermal performance of buildings - Calculation of interna
6、l temperatures of a room in summer without mechanical cooling -Simplified methods (ISO 13792:2012) Performance thermique des btiments - Calcul des tempratures intrieures en t dun local sans dispositif de refroidissement mcanique - Mthodes simplifies (ISO 13792:2012) Wrmetechnisches Verhalten von Geb
7、uden - Berechnung von sommerlichen Raumtemperaturen bei Gebuden ohne Anlagentechnik - Vereinfachtes Berechnungsverfahren (ISO 13792:2012) This European Standard was approved by CEN on 14 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
8、ons 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists i
9、n 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 CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standar
10、ds bodies of Austria, Belgium, Bulgaria, Croatia, 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, Turkey
11、 and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO
12、 13792:2012: EBS EN ISO 13792:2012 EN ISO 13792:2012 (E) 3 Foreword This document (EN ISO 13792:2012) has been 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 building
13、s 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 September 2012, and conflicting national standards shall be withdrawn at the lat
14、est by September 2012. 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 ISO 13792:2005. According to the CE
15、N/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, Iceland, Ireland, Italy, Latvia, Li
16、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 13792:2012 has been approved by CEN as a EN ISO 13792:2012 without any modification. BS EN ISO 13792:2012ISO 1
17、3792:2012(E) ISO 2012 All rights reserved iiiContents Page Foreword iv Introduction vi 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 . 2 3.3 Subscripts 5 4 Input data and results . 6 4.1 Assumptions 6 4.2 Boundary con
18、ditions and input data . 6 4.2.1 Boundary conditions . 6 4.2.2 Heat transfer coefficients . 7 4.2.3 Geometrical and thermophysical parameters of the room envelope 7 4.2.4 Air change rate 10 4.2.5 Internal gain . 11 4.3 Output data 11 5 Calculation procedure . 11 6 Validation procedures . 12 6.1 Intr
19、oduction 12 6.2 Validation procedure for the calculation method 12 6.2.1 General . 12 6.2.2 Geometry 12 6.2.3 Description of elements 13 6.2.4 Combination of elements 14 6.2.5 Climatic data 15 6.2.6 Internal energy sources 16 6.2.7 Ventilation pattern . 17 6.2.8 Test results 17 6.3 Validation proced
20、ure for the sunlit factor due to external obstructions . 18 Annex A (informative) Examples of solution model 21 Annex B (informative) Air changes for natural ventilation . 37 Annex C (informative) Evaluation of shaded area of a plane surface due to external obstructions 39 Annex D (informative) Inte
21、rnal gains 42 Annex E (informative) Examples of calculation . 44 Annex F (informative) Normative references to international publications with their corresponding European publications 53 BS EN ISO 13792:2012ISO 13792:2012(E) iv ISO 2012 All rights reservedForeword ISO (the International Organizatio
22、n 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 has
23、 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. Inter
24、national 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. Publicat
25、ion 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 righ
26、ts. ISO 13792 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 13792:2005), which has been technically revised. The main changes compare
27、d to the previous edition are given in the following table. BS EN ISO 13792:2012ISO 13792:2012(E) ISO 2012 All rights reserved vClause/subclause Changes 2 Added ISO 9050, ISO 10292, and ISO 15927-2 3.2 and 3.3 Deleted g and m Added subscript sl 4.2.1.2 Added first and second list items, descriptions
28、 of the reference 4.2.3 Replaced U* by U Replaced g by Sfas the solar heat gain factor Deleted Equation (1) and replaced old Equations (2) to (6) by Equations (1) to (5) Amended Equations (2) to (4) 4.2.3.2 Third list item, replaced g by Sf16.2.5 Added the descriptions of the latitudes in Tables 7,
29、8 and 9 A.2.1 Amended the descriptions of symbols Sfand n A.2.2 Amended Equation (A.1) A.2.3 Added the equation to define AtAmended Equation (A.24) A.3.1 Amended Equations (A.28), (A.31), (A.32), (A.33) and (A.34) A.3.2.1 Amended Equation (A.35) Amended the unit for c A.3.2.2.1 Amended Equations (A.
30、38), (A.39), (A.40), (A.45) and (A.47) Changed the description of HTA.3.2.2.2 Amended Equation (A.49) A.3.2.3 Amended Equation (A.52) A.3.3 Amended Equation (A.53) C.2 Added a title to Table C.1 E.1 Amended the description of Sfin Table E.5 E.3 Replaced U*mby UmBS EN ISO 13792:2012ISO 13792:2012(E)
31、vi ISO 2012 All rights reservedIntroduction Knowledge of the internal temperature of a room in warm periods is needed for several purposes, such as: a) defining the characteristics of a room at the design stage, in order to prevent or limit overheating in summer; b) assessing the need for a cooling
32、installation. The internal temperature is influenced by many parameters such as climatic data, envelope characteristics, ventilation and internal gains. The internal temperature of a room in warm periods can be determined using detailed calculation methods. ISO 13791 lays down the assumptions and th
33、e criteria to be satisfied for assessment of internal conditions in the summer with no mechanical cooling. However, for a number of applications, the calculation methods based on ISO 13791 are too detailed. Simplified methods are derived from more or less the same description of the heat transfer pr
34、ocesses in a building. Each calculation method has its own simplification, assumptions, fixed values, special boundary conditions and validity area. A simplified method can be implemented in many ways. In general, the maximum allowed simplification of the calculation method and the input data is det
35、ermined by the required amount and accuracy of the output data. This International Standard defines the level, the amount and the accuracy of the output data and the allowed simplification of the input data. No particular calculation methods are included in the normative part of this International S
36、tandard. As examples, two calculation methods are given in Annex A. They are based on the simplification of the heat transfer processes that guarantees the amount and the accuracy of the output data and the simplification of the input data required by this International Standard. The use of these si
37、mplified calculation methods does not imply that other calculation methods are excluded from standardization, nor does it hamper future developments. Clause 6 gives the criteria to be satisfied in order for a method to comply with this International Standard. BS EN ISO 13792:2012INTERNATIONAL STANDA
38、RD ISO 13792:2012(E) ISO 2012 All rights reserved 1Thermal performance of buildings Calculation of internal temperatures of a room in summer without mechanical cooling Simplified methods 1 Scope This International Standard specifies the required input data for simplified calculation methods for dete
39、rmining the maximum, average and minimum daily values of the operative temperature of a room in warm periods: a) to define the characteristics of a room at the design stage in order to avoid overheating in summer; b) to define whether the installation of a cooling system is necessary or not. Clause
40、6 gives the criteria to be met by a calculation method in order to satisfy this International Standard. 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
41、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 9050, Glass in building Determination
42、 of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors ISO 10077-1, Thermal performance of windows, doors and shutters Calculation of thermal transmittance Part 1: General ISO 10292, Glass in building Calculation o
43、f steady-state U values (thermal transmittance) of multiple glazing ISO 13370, Thermal performance of buildings Heat transfer via the ground Calculation methods ISO 13791, Thermal performance of buildings Calculation of internal temperatures of a room in summer without mechanical cooling General cri
44、teria and validation procedures ISO 15927-2, Hygrothermal performance of buildings Calculation and presentation of climatic data Part 2: Hourly data for design cooling load EN 410, Glass in building Determination of luminous and solar characteristics of glazing EN 673, Glass in building Determinatio
45、n of thermal transmittance (U value) Calculation method EN 13363-1, Solar protection devices combined with glazing Calculation of solar and light transmittance Part 1: Simplified method BS EN ISO 13792:2012ISO 13792:2012(E) 2 ISO 2012 All rights reserved3 Terms, definitions, symbols and units 3.1 Te
46、rms and definitions For the purposes of this document, the terms and definitions given in ISO 7345 and the following apply. 3.1.1 internal environment closed space delimited from the external environment or adjacent spaces by the building fabric 3.1.2 room element wall, ceiling, roof, floor, door or
47、 window that separates the internal environment from the external environment or an adjacent space 3.1.3 room air air in the room 3.1.4 internal air temperature temperature of the room air 3.1.5 internal surface temperature temperature of the internal surface of a building element 3.1.6 mean radiant
48、 temperature uniform surface temperature of an enclosure in which an occupant would exchange the same amount of radiant heat as in the actual non-uniform enclosure 3.1.7 operative temperature uniform temperature of an enclosure in which an occupant would exchange the same amount of heat by radiation
49、 plus convection as in the actual non-uniform environment NOTE For simplification, the mean value of the air temperature and the mean radiant temperature of the room can be used. 3.2 Symbols and units For the purposes of this document, the following symbols and units apply. Symbol Definition Unit A area m2Accavity area m2Amthermal mass area m2Assunlit area m2Atexposed area m2Awwall area m2C heat capacity J/K Ciinternal heat capacity J/K BS EN ISO 13792:2012ISO 13792:2012(E) ISO 2012 All rig
