SIST-TP CEN ISO/TR 52022-2:2017

Energy performance of buildings - Thermal, solar and daylight properties of building components and elements - Part 2: Explanation and justification (ISO/TR 52022-2:2017)

This new technical report refers to the cluster of standards EN ISO 10077-1, EN ISO 10077-2, EN ISO 12631, EN ISO 52022-X (based on the revision of EN 13363-1 and EN ISO 52022-X (based on the revision of EN 13363-2) on the Thermal performance of windows, doors and shutters – Thermal, solar and daylight properties of windows, frames and facades - Calculation methods. It contains information to support the correct understanding, use and national adaptation of these standards. This technical report does not contain any normative provision.

Energieeffizienz von Gebäuden - Wärmetechnische, solare und tageslichtbezogene Eigenschaften von Bauteilen und Bauelementen - Teil 2: Erklärung und Begründung (ISO/TR 52022-2:2017)

Dieser Technische Bericht bezieht sich auf die Normen ISO 10077 1, ISO 10077 2, ISO 12631, ISO 52022 1 und ISO 52022 3.
Er enthält Informationen für das korrekte Verständnis und die ordnungsgemäße Anwendung dieser Normen.
Dieser Technische Bericht enthält keine normativen Vorschriften.

Performance énergétique des bâtiments - Propriétés thermiques, solaires et lumineuses des composants et éléments du bâtiment - Partie 2: Explication et justification (ISO/TR 52022-2:2017)

L'ISO/TR 52022-2:2017 contient des informations permettant d'assurer la compréhension et l'utilisation correctes des normes ISO 10077‑1, ISO 10077‑2, ISO 12631, ISO 52022‑1 et ISO 52022‑3.
Le présent Rapport technique ne contient aucune disposition normative.

Energetska učinkovitost stavb - Lastnosti gradbenih komponent in elementov glede toplote, sončnega obsevanja in dnevne svetlobe - 2. del: Obrazložitev in utemeljitev (ISO/TR 52022-2:2017)

To novo tehnično poročilo se sklicuje na skupino standardov EN ISO 10077-1, EN ISO 10077-2, EN ISO 12631, EN ISO 52022-X (na podlagi revizije standardov EN 13363-1 in EN ISO 52022-X (na podlagi revizije standarda EN 13363-2)) za toplotno učinkovitost oken, vrat in polken – Lastnosti oken, okvirjev in fasad glede toplote, sončnega obsevanja ter dnevne svetlobe – Računske metode. Vsebuje informacije za podporo pravilnega razumevanja, uporabe in nacionalne prilagoditve teh standardov. To tehnično poročilo ne vsebuje nobenih normativnih določb.

General Information

• Status: Published
• Public Enquiry End Date: 09-Jan-2017
• Publication Date: 15-Aug-2017
• ICS: 27.015 - Energy efficiency. Energy conservation in general
• ICS: 91.120.10 - Thermal insulation of buildings
• Technical Committee: TOP - Thermal insulation
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Aug-2017
• Due Date: 06-Oct-2017
• Completion Date: 16-Aug-2017
• Directive: 2010/31/EU - Directive 2010/31/eu of the European Parliament and of the Council of 19 May 2010 on the energy performance of buildings (recast)
• Mandate: M/480 - Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of standards for a methodology calculating the integrated energy performance of buildings and promoting the energy efficiency of buildings, in accordance with the terms set in the recast of the Directive on the energy performance buildings (2010/31/EU)
• Ref Project: CEN ISO/TR 52022-2:2017 - Energy performance of buildings - Thermal, solar and daylight properties of building components and elements - Part 2: Explanation and justification (ISO/TR 52022-2:2017)

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CEN ISO/TR 52022-2:2017
01-september-2017
(QHUJHWVNDXþLQNRYLWRVWVWDYE/DVWQRVWLJUDGEHQLKNRPSRQHQWLQHOHPHQWRY
JOHGHWRSORWHVRQþQHJDREVHYDQMDLQGQHYQHVYHWOREHGHO2EUD]ORåLWHYLQ
XWHPHOMLWHY,6275
Energy performance of buildings - Thermal, solar and daylight properties of building
components and elements - Part 2: Explanation and justification (ISO/TR 52022-2:2017)
Energieeffizienz von Gebäuden - Wärmetechnische, solare und tageslichtbezogene
Eigenschaften von Bauteilen und Bauelementen - Teil 2: Erklärung und Begründung
(ISO/TR 52022-2:2017)
Performance énergétique des bâtiments - Propriétés thermiques, solaires et lumineuses
des composants et éléments du bâtiment - Partie 2: Explication et justification (ISO/TR
52022-2:2017)
Ta slovenski standard je istoveten z: CEN ISO/TR 52022-2:2017
ICS:
27.015 (QHUJLMVNDXþLQNRYLWRVW Energy efficiency. Energy
2KUDQMDQMHHQHUJLMHQD conservation in general
VSORãQR
91.120.10 Toplotna izolacija stavb Thermal insulation of
buildings
SIST-TP CEN ISO/TR 52022-2:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN ISO/TR 52022-2:2017

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SIST-TP CEN ISO/TR 52022-2:2017


CEN ISO/TR 52022-2
TECHNICAL REPORT

RAPPORT TECHNIQUE

July 2017
TECHNISCHER BERICHT
ICS 91.120.10
English Version

Energy performance of buildings - Thermal, solar and
daylight properties of building components and elements -
Part 2: Explanation and justification (ISO/TR 52022-
2:2017)
Performance énergétique des bâtiments - Propriétés Energieeffizienz von Gebäuden - Wärmetechnische,
thermiques, solaires et lumineuses des composants et solare und tageslichtbezogene Eigenschaften von
éléments du bâtiment - Partie 2: Explication et Bauteilen und Bauelementen - Teil 2: Erklärung und
justification (ISO/TR 52022-2:2017) Begründung (ISO/TR 52022-2:2017)


This Technical Report was approved by CEN on 24 February 2017. It has been drawn up by the Technical Committee CEN/TC 89.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN ISO/TR 52022-2:2017 E
worldwide for CEN national Members.

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CEN ISO/TR 52022-2:2017 (E)
Contents Page
European foreword . 3
2

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CEN ISO/TR 52022-2:2017 (E)
European foreword
This document (CEN ISO/TR 52022-2:2017) 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
This document is part of the set of standards on the energy performance of buildings (the set of EPB
standards) and has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association (Mandate M/480, see reference [EF1] below), and supports essential
requirements of EU Directive 2010/31/EC on the energy performance of buildings (EPBD, [EF2]).
In case this standard is used in the context of national or regional legal requirements, mandatory
choices may be given at national or regional level for such specific applications, in particular for the
application within the context of EU Directives transposed into national legal requirements.
Further target groups are users of the voluntary common European Union certification scheme for the
energy performance of non-residential buildings (EPBD art.11.9) and any other regional (e.g. Pan
European) parties wanting to motivate their assumptions by classifying the building energy
performance for a dedicated building stock.
References:
[EF1] Mandate M480, Mandate to CEN, CENELEC and ETSI for the elaboration and adoption of
standards for a methodology calculating the integrated energy performance of buildings and promoting
the energy efficiency of buildings, in accordance with the terms set in the recast of the Directive on the
energy performance of buildings (2010/31/EU) of 14th December 2010
[EF2] EPBD, Recast of the Directive on the energy performance of buildings (2010/31/EU) of 14th
December 2010
Endorsement notice
The text of ISO/TR 52022-2:2017 has been approved by CEN as CEN ISO/TR 52022-2:2017 without any
modification.

3

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SIST-TP CEN ISO/TR 52022-2:2017
TECHNICAL ISO/TR
REPORT 52022-2
First edition
2017-06
Energy performance of buildings —
Thermal, solar and daylight properties
of building components and
elements —
Part 2:
Explanation and justification
Performance énergétique des bâtiments — Propriétés thermiques,
solaires et lumineuses des composants et éléments du bâtiment —
Partie 2: Explication et justification
Reference number
ISO/TR 52022-2:2017(E)
©
ISO 2017

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ISO/TR 52022-2:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2017 – All rights reserved

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ISO/TR 52022-2:2017(E)

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and subscripts . 2
5 Brief description of the methods . 2
5.1 Outputs of the method. 2
5.2 General description of the methods . 2
6 ISO 10077-1 Thermal performance of windows, doors and shutters – Calculation of
thermal transmittance – Part 1: General . 2
6.1 General . 2
6.2 Thermal transmittance of the glazing . 3
6.3 Additional thermal resistance of windows with closed shutters . 3
7 ISO 10077-2 Thermal performance of windows, doors and shutters – Calculation of
thermal transmittance – Part 2: Numerical method for frames.3
7.1 General . 3
7.2 Calculation principle . 3
8 ISO 12631 Thermal performance of curtain walling – Calculation of
thermal transmittance . 4
8.1 General . 4
8.2 Calculation examples . 4
9 ISO 52022-1 Energy performance of buildings — Thermal, solar and daylight
properties of building components and elements — Part 1: Simplified calculation
method of the solar and daylight characteristics for solar protection devices
combined with glazing . 4
9.1 General . 4
9.2 Data for typical glazing and solar protection devices . 5
9.3 Solar transmittance of solar protection devices . 5
9.4 Calculation example. 5
10 ISO 52022-3 Energy performance of buildings — Thermal, solar and daylight
properties of building components and elements — Part 3: Detailed calculation
method of the solar and daylight characteristics for solar protection devices
combined with glazing . 6
10.1 General . 6
10.2 Equivalent solar and light optical characteristics for louvres or venetian blinds . 6
10.3 Calculation example. 6
Annex A (informative) ISO 10077-1: Thermal transmittance of double and triple glazing .7
Annex B (informative) ISO 10077-1: Additional thermal resistance for windows with
closed shutters . . 9
Annex C (informative) ISO 12631: Component method: Calculation example .12
Annex D (informative) ISO 12631: Single assessment method: Calculation example .17
Annex E (informative) ISO 52022-1: Data for typical glazing and solar protection devices .20
Annex F (informative) ISO 52022-1: Example of calculation of a solar protection device in
combination with glazing .21
Annex G (informative) Extended methodology for the determination of equivalent solar
and light optical characteristics for louvres or venetian blinds .23
© ISO 2017 – All rights reserved iii

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Annex H (informative) ISO 52022-3: Calculation example .45
Bibliography .47
iv © ISO 2017 – All rights reserved

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Foreword
ISO (the International Organization 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 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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO’s adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: w w w . i s o .org/ iso/ foreword .html.
ISO 52022-2 was prepared by the European Committee for Standardization (CEN) 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 cooperation
between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 52022 series can be found on the ISO website.
© ISO 2017 – All rights reserved v

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Introduction
The set of EPB standards, technical reports and supporting tools
In order to facilitate the necessary overall consistency and coherence, in terminology, approach,
input/output relations and formats, for the whole set of EPB-standards, the following documents and
tools are available:
a) a document with basic principles to be followed in drafting EPB-standards:
[1]
CEN/TS 16628:2014 ;
b) a document with detailed technical rules to be followed in drafting EPB-standards;
[2]
CEN/TS 16629:2014 .
The detailed technical rules are the basis for the following tools:
1) a common template for each EPB-standard, including specific drafting instructions for the
relevant clauses;
2) a common template for each technical report that accompanies an EPB standard or a cluster of
EPB standards, including specific drafting instructions for the relevant clauses;
3) a common template for the spreadsheet that accompanies each EPB (calculation) standard, to
demonstrate the correctness of the EPB calculation procedures.
Each EPB-standards follows the basic principles and the detailed technical rules and relates to the
[3]
overarching EPB-standard, ISO 52000-1 .
One of the main purposes of the revision of the EPB-standards is to enable that laws and regulations
directly refer to the EPB-standards and make compliance with them compulsory. This requires that
the set of EPB-standards consists of a systematic, clear, comprehensive and unambiguous set of energy
performance procedures. The number of options provided is kept as low as possible, taking into account
national and regional differences in climate, culture and building tradition, policy and legal frameworks
(subsidiarity principle). For each option, an informative default option is provided (Annex B).
Rationale behind the EPB technical reports
There is a risk that the purpose and limitations of the EPB standards will be misunderstood, unless
the background and context to their contents – and the thinking behind them - is explained in some
detail to readers of the standards. Consequently, various types of informative contents are recorded
and made available for users to properly understand, apply and nationally or regionally implement the
EPB standards.
If this explanation would have been attempted in the standards themselves, the result is likely to be
confusing and cumbersome, especially if the standards are implemented or referenced in national or
regional building codes.
Therefore each EPB standard is accompanied by an informative technical report, like this one, where
all informative content is collected to ensure a clear separation between normative and informative
[2]
contents (see CEN/TS 16629 ):
— to avoid flooding and confusing the actual normative part with informative content;
— to reduce the page count of the actual standard, and
— to facilitate understanding of the set of EPB standards.
[5]
This was also one of the main recommendations from the European CENSE project that that laid the
foundation for the preparation of the set of EPB standards.
vi © ISO 2017 – All rights reserved

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This technical report
This technical report accompanies the suite of EPB standards on thermal transmission properties
windows, doors and curtain wallings and the standards for solar and daylight characteristics for solar
[6] [7] [8]
protection devices combined with glazing. It relates to ISO 10077-1 , ISO 10077-2 , ISO 12631 ,
[9] [10]
ISO 52022-1 and ISO 52022-3 which form part of a set of standards related to the evaluation of
the energy performance of buildings (EPB).
The role and the positioning of the accompanied standard(s) in the set of EPB standards is defined in
the introductions to ISO 10077-1, ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3.
Accompanying spreadsheets
Concerning ISO 10077-1, ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3, spreadsheets were
produced for:
— ISO 10077-1;
— ISO 12631;
— ISO 52022-1.
No accompanying calculation spreadsheets were prepared on:
— ISO 10077-2: The calculation method of ISO 10077-2 cannot be implemented in a spreadsheet.
— ISO 52022-3: The calculation method of ISO 52022-3 cannot be implemented in a spreadsheet.
These spreadsheets are available at www .epb .center.
© ISO 2017 – All rights reserved vii

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SIST-TP CEN ISO/TR 52022-2:2017
TECHNICAL REPORT ISO/TR 52022-2:2017(E)
Energy performance of buildings — Thermal, solar
and daylight properties of building components and
elements —
Part 2:
Explanation and justification
1 Scope
This document contains information to support the correct understanding and use of ISO 10077-1,
ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3.
This technical report does not contain any normative provision.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 6946, Building components and building elements — Thermal resistance and thermal transmittance –
Calculation methods
ISO 7345, Thermal insulation — Physical quantities and definitions
ISO 10077-1, Thermal performance of windows, doors and shutters — Calculation of thermal
transmittance — Part 1: General
ISO 10077-2, Thermal performance of windows, doors and shutters — Calculation of thermal
transmittance — Part 2: Numerical method for frames
ISO 12631:2017, Thermal performance of curtain walling — Calculation of thermal transmittance
ISO 52022-1, Energy performance of buildings— Thermal, solar and daylight properties of building
components and elements Part 1: Simplified calculation method of the solar and daylight characteristics for
solar protection devices combined with glazing
ISO 52022-3, Energy performance of buildings— Thermal, solar and daylight properties of building
components and elements Part 3: Detailed calculation method of the solar and daylight characteristics for
solar protection devices combined with glazing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6946, ISO 7345, ISO 10077-1,
ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3 apply.
More information on some key EPB terms and definitions is given in ISO/TR 52000-2.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
© ISO 2017 – All rights reserved 1

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4 Symbols and subscripts
For the purposes of this document, the symbols and subscripts given in ISO 7345, ISO 6946, ISO 10077-1,
ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3 apply.
5 Brief description of the methods
5.1 Outputs of the method
The main outputs of these standards are:
— thermal transmittance of windows, doors, curtain walls, shutter boxes and frames;
— solar and daylight characteristics (solar energy transmittance, daylight transmittance) for solar
protecting devices combined with glazing.
5.2 General description of the methods
ISO 10077-1, ISO 10077-2, ISO 12631, ISO 52022-1 and ISO 52022-3 provide the methodology to obtain
the energy losses due to transmission and the energy gains due to solar radiation for windows, doors
and curtain walls.
The calculation of the thermal transmittance of windows, doors according to ISO 10077-1 and curtain
walls according to ISO 12631 is calculated as a function of the thermal transmittance of the components
and their geometrical characteristics, plus the thermal interactions between the components.
The calculation of the thermal transmittance of frame profiles, shutter boxes and the linear thermal
transmittance according to ISO 10077-2 is carried out using a two dimensional numerical method.
There are two separate standards for the calculation of the solar and daylight characteristics for solar
protection devices combined with glazing. ISO 52022-1 defines a simplified method based on the thermal
transmittance and total solar energy transmittance of the glazing and on the light transmittance and
reflectance of the solar protection device to estimate the total solar energy transmittance of a solar
protection device combined with glazing. The results generally tend to lie on the safe side for cooling
load estimations. The results are not intended to be used for calculating beneficial solar gains or
thermal comfort criteria. The calculations according to ISO 52022-1 can in principle be performed by a
pocket calculator.
For cases not covered by ISO 52022-3 more exact calculations based on the optical properties (in
general the spectral data) of glass and solar protection device can be carried out in accordance with
ISO 52022-3. The total solar energy transmittance, the total solar direct transmittance and the
total light transmittance is calculated as a function of the thermal resistance and spectral “optical”
properties (transmittance, reflectance) of the individual layers. To solve the system of equations defined
in ISO 52022-3 the use of an iterative procedure and therefore in general a software tool is necessary.
6 ISO 10077-1 Thermal performance of windows, doors and shutters –
Calculation of thermal transmittance – Part 1: General
6.1 General
ISO 10077-1 provides a calculation method to obtain the thermal transmittance of windows and
pedestrian doors consisting of glazed and/or or opaque panels fitted in a frame, with and without
shutters.
In general, the thermal transmittance or U-value of the window or door product or assembly is calculated
as a function of the thermal transmittance of the components and their geometrical characteristics,
plus the thermal interactions between the components.
2 © ISO 2017 – All rights reserved

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An alternative to calculation according to ISO 10077-1 is testing of the complete window or door
according to ISO 12567-1 or, for roof windows, according to ISO 12567-2.
The following subclauses provide information in addition to that given in ISO 10077-1.
6.2 Thermal transmittance of the glazing
If measured or calculated data are not available, the values in Annex A may be used.
6.3 Additional thermal resistance of windows with closed shutters
A shutter or blind on the outside of a window introduces an additional thermal resistance ΔR, resulting
from both the air layer enclosed between the shutter and the window, and the shutter itself. ΔR depends
on the thermal transmission properties of the shutter/blind and on its air permeability and is evaluated
according to ISO 10077-1.
Annex B of this document gives some typical values of shutter thermal resistance and the corresponding
values of ΔR, which can be used in the absence of values of R obtained from measurement or
sh
calculation.
7 ISO 10077-2 Thermal performance of windows, doors and shutters –
Calculation of thermal transmittance – Part 2: Numerical method for frames
7.1 General
ISO 10077-2 specifies a method and gives reference input data for the calculation of the thermal
transmittance of frame profiles and of the linear thermal transmittance of their junction with glazing or
opaque panels. The method can also be used to evaluate the thermal resistance of shutter profiles and
the thermal characteristics of roller shutter boxes and similar components (e.g., blinds). ISO 10077-2
also gives criteria for the validation of numerical methods used for the
...