EN ISO 13791:2012

Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - General criteria and validation procedures (ISO 13791:2012)

ISO 13791:2011 specifies the assumptions, boundary conditions, equations and validation tests for a calculation procedure, under transient hourly conditions, of the internal temperatures (air and operative) during warm periods, of a single room without any cooling/heating equipment in operation.

Wärmetechnisches Verhalten von Gebäuden - Sommerliche Raumtemperaturen bei Gebäuden ohne Anlagentechnik - Allgemeine Kriterien und Validierungsverfahren (ISO 13791:2012)

Dieses Dokument legt die Annahmen, Randbedingungen, Gleichungen und Validierungsprüfungen für ein Verfahren zur Berech¬nung der Innentemperaturen (Luft und operativ) eines Einzelraumes ohne Kühl /Heiz-anlage während der warmen Jahreszeit unter stundenbezogenen Übergangsbedingungen fest. In diesem Dokument werden keine spezifischen numerischen Verfahrensweisen vorgeschrieben. Im Abschnitt 7 sind Validierungsverfahren angegeben. Ein Lösungsbeispiel ist im Anhang A gegeben.
Die in diesem Dokument enthaltenen Informationen sind nicht ausreichend, um ein Verfahren festzulegen, mit dem die inneren Bedingungen von speziellen Zonen, wie z. B. angebaute Sonnenräume, Vorhallen, indirekte passive Solarkompo¬nenten (Trombe-Wände, Solarzellenplatten), und von Zonen, in denen die Sonnenstrahlung durch den Raum hindurchgehen kann, bestimmt werden können. Für derartige Situationen sind andere Annahmen und ausführlichere Lösungsmodelle erforderlich (siehe Literaturhinweise).

Performance thermique des bâtiments - Calcul des températures intérieures en été d'un local sans dispositif de refroidissement - Critères généraux et procédures de validation (ISO 13791:2012)

L'ISO 13791:2012 spécifie les hypothèses, conditions aux limites, équations et essais de validation à adopter pour une méthode de calcul, en régime transitoire horaire, des températures intérieures (de l'air et opérative) pendant les périodes chaudes, d'un seul local dépourvu d'installation de refroidissement/chauffage en service.

Toplotne značilnosti stavb - Izračun notranje temperature prostorov poleti brez mehanskega hlajenja - Splošna merila in validacija postopka (ISO 13791:2012)

Ta evropski standard določa metode in postopke za oceno trdnosti betona v zgradbah in montažnih betonskih sestavnih delih na kraju samem; določa načela in navodila za definicijo razmerja med rezultati preskusa na podlagi posrednih preskusnih metod in trdnosti jedra na kraju samem; določa navodila za oceno trdnosti betona v zgradbah ali montažnih betonskih sestavnih delih na kraju samem s posrednimi ali kombiniranimi metodami. V ta evropski standard niso vključeni naslednji primeri: uporaba posrednih metod brez korelacije s trdnostjo jedra; ocena na podlagi jeder, manjših od 50 mm v premeru; ocena na podlagi manj kot 3 jeder; uporaba mikrojeder.

General Information

• Status: Withdrawn
• Publication Date: 14-Mar-2012
• Withdrawal Date: 18-Jul-2017
• ICS: 91.120.10 - Thermal insulation of buildings
• Technical Committee: CEN/TC 89 - Thermal performance of buildings and building components
• Drafting Committee: CEN/TC 89 - Thermal performance of buildings and building components
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Completion Date: 19-Jul-2017
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/113 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on wood based panels
• Ref Project: SIST EN ISO 13791:2012 - Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - General criteria and validation procedures (ISO 13791:2012)

Relations

• Replaces: EN ISO 13791:2004 - Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - General criteria and validation procedures (ISO 13791:2004)
• Effective Date: 22-Dec-2008
• Replaced By: EN ISO 52016-1:2017 - Energy performance of buildings - Energy needs for heating and cooling, internal temperatures and sensible and latent heat loads - Part 1: Calculation procedures (ISO 52016-1:2017)
• Effective Date: 08-Jun-2022
• Replaced By: EN ISO 52017-1:2017 - Energy performance of buildings - Sensible and latent heat loads and internal temperatures - Part 1: Generic calculation procedures (ISO 52017-1:2017)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2012
1DGRPHãþD
SIST EN ISO 13791:2005
7RSORWQH]QDþLOQRVWLVWDYE,]UDþXQQRWUDQMHWHPSHUDWXUHSURVWRURYSROHWLEUH]
PHKDQVNHJDKODMHQMD6SORãQDPHULODLQYDOLGDFLMDSRVWRSND,62
Thermal performance of buildings - Calculation of internal temperatures of a room in
summer without mechanical cooling - General criteria and validation procedures (ISO
13791:2012)
Wärmetechnisches Verhalten von Gebäuden - Sommerliche Raumtemperaturen bei
Gebäuden ohne Anlagentechnik - Allgemeine Kriterien und Validierungsverfahren (ISO
13791:2012)
Performance thermique des bâtiments - Calcul des températures intérieures en été d'un
local sans dispositif de refroidissement - Critères généraux et procédures de validation
(ISO13791:2012)
Ta slovenski standard je istoveten z: EN ISO 13791:2012
ICS:
91.120.10 Toplotna izolacija stavb Thermal insulation
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 13791
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2012
ICS 91.120.10 Supersedes EN ISO 13791:2004
English Version
Thermal performance of buildings - Calculation of internal
temperatures of a room in summer without mechanical cooling -
General criteria and validation procedures (ISO 13791:2012)
Performance thermique des bâtiments - Calcul des Wärmetechnisches Verhalten von Gebäuden -
températures intérieures en été d'un local sans dispositif de Sommerliche Raumtemperaturen bei Gebäuden ohne
refroidissement - Critères généraux et procédures de Anlagentechnik - Allgemeine Kriterien und
validation (ISO 13791:2012) Validierungsverfahren (ISO 13791:2012)
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 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 CEN-CENELEC 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 CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards 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 and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13791:2012: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 13791:2012) 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 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 September 2012, and conflicting national standards shall be
withdrawn at the latest 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 13791:2004.
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, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 13791:2012 has been approved by CEN as a EN ISO 13791:2012 without any modification.
INTERNATIONAL ISO
STANDARD 13791
Second edition
2012-03-15
Thermal performance of buildings —
Calculation of internal temperatures of
a room in summer without mechanical
cooling — General criteria and validation
procedures
Performance thermique des bâtiments — Calcul des températures
intérieures en été d'un local sans dispositif de refroidissement —
Critères généraux et procédures de validation

Reference number
ISO 13791:2012(E)
©
ISO 2012
ISO 13791:2012(E)
©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
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Published in Switzerland
ii © ISO 2012 – All rights reserved

ISO 13791:2012(E)
Contents Page
Foreword . v
Introduction . vii
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
3.3  Subscripts . 5
4  Determination of internal temperatures . 6
4.1  Assumptions . 6
4.2  Evaluation of the relevant temperatures . 6
4.2.1  Internal air temperature . 6
4.2.2  Internal surface temperature . 7
4.2.3  Surface delimiting two solid layers . 8
4.2.4  Surface of an air layer . 8
4.2.5  External surface of a room element . 9
4.2.6  Relevant temperatures for special construction elements . 9
4.3  Room thermal balance . 10
4.4  Boundary conditions . 11
4.4.1  Single room . 11
4.4.2  Similar rooms . 11
4.4.3  Adjacent room with defined value of the air temperature . 14
4.4.4  Floor on ground . 15
4.4.5  Cellar or crawl space . 15
4.4.6  Ceiling below attic . 15
4.5  Terms in the thermal balance equations . 15
4.5.1  Heat conduction through components . 15
4.5.2  Convective heat transfer . 16
4.5.3  Short-wave radiation heat transfers . 19
4.5.4  Long-wave radiation heat transfer . 23
4.5.5  Internal gains . 25
4.5.6  Heat flow due to ventilation . 26
5  Determination of internal humidity . 27
6  Procedure for carrying out calculations . 27
6.1  General . 27
6.2  Design climatic data . 27
6.2.1  General . 27
6.2.2  Long-period design climatic data . 28
6.2.3  Design warm sequence . 28
6.3  Geometrical and thermophysical characteristics of room elements . 28
6.4  Design internal gains . 28
6.5  Design occupant behaviour . 28
6.6  Calculation procedure . 29
6.6.1  General . 29
6.6.2  Definition of the starting conditions . 29
6.6.3  Prediction of the internal temperatures . 29
7  Report of the calculation . 29
ISO 13791:2012(E)
8  Validation procedures .30
8.1  Introduction .30
8.2  Validation of heat transfer processes .30
8.2.1  General .30
8.2.2  Heat conduction through opaque elements .30
8.2.3  Internal long-wave radiation exchanges .32
8.2.4  Sunlit area of a window due to external obstructions .34
8.3  Validation procedure for the whole calculation method.
...