EN ISO 13792:2005

Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - Simplified methods (ISO 13792:2005)

ISO 13792:2005 specifies the required input data for simplified calculation methods for determining the maximum, average and minimum daily values of the operative temperature of a room in the warm period to define the characteristics of a room in order to avoid overheating in summer at the design stage, and to define whether the installation of a cooling system is necessary or not.
The criteria to be met by a calculation method in order to satisfy this standard are also given.

Wärmetechnisches Verhalten von Gebäuden - Berechnung von sommerliche Raumtemperaturen bei Gebäuden ohne Anlagentechnik - Vereinfachtes Berechnungsverfahren (ISO 13792:2005)

Dieses Dokument klassifiziert die benötigten Eingabedaten, die für einfache Berechnungsverfahren zur Bestimmung der täglichen Höchst , Mittel  und Mindestwerte der empfundenen Temperatur eines Raumes in der warmen Jahreszeit aus folgenden Gründen erforderlich sind:
a)   um festzulegen, welche Kenngrößen eines Raumes im Entwurfsstadium erforderlich sind, um eine Überhitzung im Sommer zu vermeiden;
b)   um festzulegen, ob der Einbau einer Kühlanlage erforderlich ist oder nicht.
In Abschnitt 6 sind die Kriterien angegeben, denen ein Berechnungsverfahren zur Einhaltung des vorliegenden Dokuments entsprechen muss.

Performance thermique des bâtiments - Température intérieure en été d'un local non climatisé - Méthodes de calcul simplifiées (ISO 13792:2005)

L'ISO 13792:2005 définit les données d'entrée exigées pour qu'une méthode de calcul puisse déterminer les valeurs journalières maximales, moyennes et minimales de la température opérative d'une pièce pendant la saison chaude, pour définir les caractéristiques d'une pièce afin d'éviter un échauffement excessif en été au stade du projet, et pour définir si l'installation d'un système de refroidissement est nécessaire ou non.
Les critères que doit respecter une méthode de calcul afin de satisfaire à l'ISO 13792:2005 sont également précisés.

Toplotne značilnosti stavb - Izračun notranje temperature prostorov poleti brez mehanskega hlajenja – Poenostavljena metoda (ISO 13792:2005)

General Information

• Status: Withdrawn
• Publication Date: 28-Feb-2005
• Withdrawal Date: 14-Mar-2012
• 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/WG 6 - Calculation of non steady state thermal behaviour of buildings
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 15-Mar-2012
• Completion Date: 15-Mar-2012
• 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
• Ref Project: SIST EN ISO 13792:2005 - Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - Simplified methods (ISO 13792:2005)

Relations

• Replaced By: EN ISO 13792:2012 - Thermal performance of buildings - Calculation of internal temperatures of a room in summer without mechanical cooling - Simplified methods (ISO 13792:2012)
• Effective Date: 28-Mar-2012

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2005
7RSORWQH]QDþLOQRVWLVWDYE,]UDþXQQRWUDQMHWHPSHUDWXUHSURVWRURYSROHWLEUH]
PHKDQVNHJDKODMHQMD±3RHQRVWDYOMHQDPHWRGD,62
Thermal performance of buildings - Calculation of internal temperatures of a room in
summer without mechanical cooling - Simplified methods (ISO 13792:2005)
Wärmetechnisches Verhalten von Gebäuden - Berechnung von sommerliche
Raumtemperaturen bei Gebäuden ohne Anlagentechnik - Vereinfachtes
Berechnungsverfahren (ISO 13792:2005)
Performance thermique des bâtiments - Température intérieure en été d'un local non
climatisé - Méthodes de calcul simplifiées (ISO 13792:2005)
Ta slovenski standard je istoveten z: EN ISO 13792:2005
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 13792
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2005
ICS 91.120.10
English version
Thermal performance of buildings - Calculation of internal
temperatures of a room in summer without mechanical cooling -
Simplified methods (ISO 13792:2005)
Performances thermiques des bâtiments - Calcul de la Wärmetechnisches Verhalten von Gebäuden -
température interne d'une pièce sans climatisation Sommerliche Raumtemperaturen bei Gebäuden ohne
mécanique en été - Méthodes simplifiées (ISO Anlagentechnik - Vereinfachtes Berechnungsverfahren
13792:2005) (ISO 13792:2005)
This European Standard was approved by CEN on 30 April 2004.

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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13792:2005: E
worldwide for CEN national Members.

Contents                                                                 page
Foreword.3
Introduction .4
1 Scope.5
2 Normative references.5
3 Terms, definitions, symbols and units.5
3.1 Terms and d efinitions .5
3.2 Symbols and units .7
4 Input data and results .8
4.1 Assumptions .8
4.2 Boundary conditions and input data .8
4.3 Output data.13
5 Calculation procedure.13
6 Validation procedures.14
6.1 Introduction.14
6.2 Validation procedure for the calculation method .14
6.3 Validation procedure for the sunlit factor due to external obstructions .22
Annex A (informative) Examples of solution model .25
A.1 Introduction .25
A.2 RC three-nodes model.25
A.3 Admittance procedure.31
Annex B (informative) Air changes for natural ventilation.39
B.1 Introduction .39
B.2 Evaluation of the air change rate for natural ventilation .39
Annex C (informative) Evaluation of the shaded area of a plane surface due to external
obstructions .41
C.1 Introduction .41
C.2 Calculation procedure.41
Annex D (informative) Internal gains.43
D.1 Introduction .43
D.2 Residential building.43
D.3 Non-residential building.44
Annex E (informative) Examples of calculation .45
E.1 Room characteristics.45
E.2 Example of calculation for the RC3 nodes model .48
E.3 Admittance method.51
Annex ZA (normative) Normative references to international publications with their
corresponding European publications.54

Foreword
This document (EN ISO 13792:2005) has been prepared by Technical Committee CEN/TC 89, "Thermal
performance of buildings and building components", the secretariat of which is held by SIS, in collaboration with
Technical Committee ISO/TC 163, “Thermal performance and energy use in the built environment”, Subcommittee
SC 2, "Calculation methods".
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 August 2005, and conflicting national standards shall be withdrawn at the latest by
August 2005.
This standard is one of a series of standards on calculation methods for the design and evaluation of the thermal
performance of buildings and building elements.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,
Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Introduction
Knowledge of the internal temperature of a room in the warm period 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 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 the warm period can be determined using detailed
calculation methods. EN ISO 13791 lays down the assumptions and the criteria which have 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 EN ISO 13791 are too detailed. Simplified methods are derived from more or less
the same description of the heat transfer processes 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 determined
by the required amount and accuracy of the output data.
This document 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 standard. 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 standard.
The use of these simplified calculation methods does not imply that other calculation methods are excluded from
standardisation, nor does it hamper future developments. Clause 6 gives the criteria which have to be satisfied in
order that a method complies with this document.
1 Scope
This document specifies the required input data for simplified calculation methods for determining the maximum,
average and minimum daily values of the operative temperature of a room in the warm period:
a) to define the characteristics of a room in order to avoid overheating in summer at the design stage;
b) to define whether the installation of a cooling system is necessary or not.
Clause 6 gives the criteria to be met by a calculation method in order to satisfy this document.
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 latest edition of the referenced document (including any
amendments) applies.
EN 410, Glass in building – Determination of luminous and solar characteristics of glazing.
EN 673, Glass in building – Determination 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.
EN ISO 6946, Building components and building elements – Thermal resistance and thermal transmittance –
Calculation method (ISO 6946:1996).
EN ISO 7345:1995, Thermal insulation – Physical quantities and definitions (ISO 7345:1987).
EN ISO 10077-1, Thermal performance of windows, doors and shutters – Calculation of thermal transmittance –
Part 1: Simplified method (ISO 10077-1:2000).
EN ISO 13370, Thermal performance of buildings – Heat transfer via the ground – Calculation methods (ISO
13370:1998).
EN ISO 13786,Thermal performance of building components – Dynamic thermal characteristics – Calculation
methods (ISO 13786:1999).
EN ISO 13791:2004, Thermal performance of buildings – Calculation of internal temperatures of a room in summer
without mechanical cooling – General criteria and calculation procedures (ISO 13791:2004).

3 Terms, definitions, symbols and units
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 7345:1995 and the following apply.
3.1.1
internal environment
closed space delimited from the external environment or adjacent spaces by an envelope element
3.1.2
room element
...