prEN 410
(Main)Glass in building - Determination of luminous and solar characteristics of glazing
Glass in building - Determination of luminous and solar characteristics of glazing
This document specifies methods of determining the luminous and solar characteristics of glazing in buildings. These characteristics can serve as a basis for lighting, heating and cooling calculations of rooms and permit comparison between different types of glazing.
This document applies both to conventional glazing and to absorbing or reflecting solar-control glazing, used as vertical or horizontal glazed apertures. The appropriate formulae for single, double and triple glazing are given. A matrix method is provided as an alternative calculation method.
This document introduces a method to determine the luminous and solar properties of Building-Integrated Photovoltaic (BIPV) glazing.
This document is accordingly applicable to all transparent materials except those which show significant transmission in the wavelength region 5 µm to 50 µm of ambient temperature radiation, such as certain plastic materials.
Materials with light-scattering properties for incident radiation are dealt with as conventional transparent materials subject to certain conditions (see 5.2).
Angular light and solar properties of glass in building are excluded from this document. However, research work in this area is summarized in Bibliographic references [1], [2] and [3].
Guidance on the measurement of luminous and spectral properties of glass can be found in the Bibliography [4].
Vacuum Insulating Glass (VIG) is excluded from the scope of this document. For determination of the g value of VIG, please refer to ISO 19916-1.
Glas im Bauwesen - Bestimmung der lichttechnischen und strahlungsphysikalischen Kenngrößen von Verglasungen
Dieses Dokument legt Verfahren zur Bestimmung der lichttechnischen und strahlungsphysikalischen Kenngrößen von Verglasungen von Gebäuden fest. Diese Kenngrößen können als Grundlage für licht , heizungs- und klimatechnische Berechnungen dienen. Sie ermöglichen den Vergleich zwischen unterschiedlichen Verglasungen.
Dieses Dokument ist sowohl anwendbar auf übliche Verglasungen als auch auf absorbierende oder reflektierende Sonnenschutzgläser, eingesetzt in senkrechten oder waagerechten Lichtöffnungen. Die geeigneten Gleichungen für Einfach , Doppel- und Dreifachverglasungen sind angegeben. Als alternatives Berechnungsverfahren wird ein Matrixverfahren vorgestellt.
In diesem Dokument wird ein Verfahren zur Bestimmung der lichttechnischen und strahlungsphysikalischen Eigenschaften von gebäudeintegrierter Photovoltaikverglasung (BIPV Verglasung) vorgestellt.
Dieses Dokument ist für sämtliche lichtdurchlässige Materialien entsprechend anwendbar, ausgenommen solche, die eine nennenswerte Transmission im Wellenlängenbereich von 5 µm bis 50 µm von Strahlung bei Raumtemperatur aufweisen, wie z. B. gewisse Kunststoffe.
Materialien mit lichtstreuenden Eigenschaften für die auftreffende Strahlung werden grundsätzlich wie normale lichtdurchlässige Stoffe unter Beachtung bestimmter Bedingungen (siehe 5.2) behandelt.
Die Eigenschaften von schrägem Licht und die Strahlungseigenschaften von Glas in Gebäuden werden in diesem Dokument nicht erfasst. Forschungsarbeiten, die in diese Richtung gehen, werden jedoch zusammenfassend in [1], [2] und [3] dargestellt.
Literaturhinweis [4] enthält Leitlinien für die Messung lichttechnischer und spektraler Eigenschaften.
Vakuumisolierglas (VIG) liegt außerhalb des Anwendungsbereichs dieses Dokuments. Für die Bestimmung des g Wertes von VIG wird auf ISO 19916 1 verwiesen.
Verre dans la construction - Détermination des caractéristiques lumineuses et solaires des vitrages
Le présent document spécifie les méthodes de détermination des caractéristiques lumineuses et solaires des vitrages de bâtiment. Ces caractéristiques peuvent servir de base aux calculs relatifs à l'éclairement et au conditionnement thermique des locaux et permettre d'établir des comparaisons entre différents types de vitrage.
Le présent document s'applique aussi bien aux vitrages conventionnels qu'à ceux présentant des propriétés d'absorption et de réflexion de l'énergie solaire, et utilisés comme vitrages verticaux ou horizontaux. Des formules appropriées sont établies pour des vitrages simples, doubles ou triples. Une méthode matricielle est fournie comme méthode de calcul alternative.
Le présent document présente une méthode pour déterminer les propriétés lumineuses et solaires des vitrages photovoltaïques intégrés au bâtiment (BIPV).
Le présent document s'applique à tous les matériaux transparents, à l'exception de ceux qui présentent une transmission non négligeable dans le domaine spectral de 5 µm à 50 µm du rayonnement émis par les corps à température ambiante, telles certaines feuilles de matériaux plastiques.
Les matériaux présentant des propriétés de diffusion du rayonnement incident sont traités comme des matériaux transparents conventionnels sous certaines réserves (voir 5.2).
Les propriétés angulaires solaires et lumineuses du verre utilisé dans la construction sont exclues du présent document. Toutefois, les travaux de recherche dans ce domaine sont résumés dans les références bibliographiques [1], [2] et [3].
Des recommandations relatives au mesurage des propriétés lumineuses et spectrales du verre sont disponibles dans la Bibliographie [4].
Le vitrage isolant à lame de vide (VIG) est exclu du domaine d'application du présent document. Pour la détermination de la valeur g du VIG, se référer à l'ISO 19916-1.
Steklo v gradbeništvu - Določevanje svetlobnih in sončnih karakteristik stekla
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2025
Steklo v gradbeništvu - Določevanje svetlobnih in sončnih karakteristik stekla
Glass in building - Determination of luminous and solar characteristics of glazing
Glas im Bauwesen - Bestimmung der lichttechnischen und strahlungsphysikalischen
Kenngrößen von Verglasungen
Verre dans la construction - Détermination des caractéristiques lumineuses et solaires
des vitrages
Ta slovenski standard je istoveten z: prEN 410
ICS:
81.040.20 Steklo v gradbeništvu Glass in building
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2024
ICS 81.040.20 Will supersede EN 410:2011
English Version
Glass in building - Determination of luminous and solar
characteristics of glazing
Verre dans la construction - Détermination des Glas im Bauwesen - Bestimmung der lichttechnischen
caractéristiques lumineuses et solaires des vitrages und strahlungsphysikalischen Kenngrößen von
Verglasungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 129.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 410:2024 E
worldwide for CEN national Members.
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols . 9
5 Determination of characteristics . 11
5.1 General. 11
5.2 Light transmittance . 11
5.3 Light reflectance . 14
5.4 Total solar energy transmittance (solar factor) . 14
5.4.1 Calculation . 14
5.4.2 Division of incident solar radiant flux . 14
5.4.3 Solar direct transmittance . 16
5.4.4 Solar direct reflectance . 16
5.4.5 Solar direct absorptance . 16
5.4.6 Secondary heat transfer factor towards the inside . 16
5.5 UV-transmittance . 21
5.6 Colour rendering . 21
5.7 Shading coefficient . 23
6 Expression of results . 24
7 Test report . 24
Annex A (normative) Procedures for calculation of the spectral characteristics of glass plates
with a different thickness and/or colour . 32
A.1 Procedures for the calculation of the spectral transmittance and reflectance of an
uncoated glass plate with thickness y from its spectral transmittance measured for the
thickness x . 32
A.2 Procedures for the calculation of the spectral transmittance and reflectance of a coated
glass plate with thickness y from the spectral transmittance and reflectance of a plate of
a different glass with thickness x on which the same coating has been deposited . 33
Annex B (normative) Procedure for calculation of the spectral characteristics of laminated
glass . 36
B.1 Introduction . 36
B.2 Terminology . 36
B.3 Basic formulae . 37
B.4 Systems with two interfaces . 38
B.5 Systems with three interfaces . 42
B.6 Examples . 47
Annex C (normative) Procedure for calculation of the spectral characteristics of screen printed
glass . 54
Annex D (normative) Matrix method for non-scattering incoherent optical systems – total solar
energy transmittance for multi-pane glazing units . 55
D.1 The non-scattering incoherent optical system . 55
D.2 Matrix representation . 56
D.3 Modified Matrix Method . 57
D.4 Calculation of the total wavelength dependant absorptances . 58
D.5 Calculation of the total solar integrated absorptances . 60
D.6 Total solar energy transmittance, determination of the g value for multi-pane glazing
units . 61
D.7 Other Considerations . 63
D.8 Examples . 63
Annex E (informative) Modifications to the formulae to permit calculation and declaration of
the luminous and solar properties of BIPV glazing . 74
E.1 General . 74
E.2 Cases to be differentiated . 74
E.3 Test report . 80
Annex F (informative) Example of calculation of colour rendering index . 81
Bibliography . 84
European foreword
This document (prEN 410:2024) has been prepared by Technical Committee CEN/TC 129 “Glass in
building”, the secretariat of which is held by NBN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 410:2011.
In comparison with the previous edition, the following technical modifications have been made:
a) changes to the calculation of the internal heat transfer coefficient for consistency with EN 673:2024;
b) clarification provided that UV transmittance is determined only for the total range and not split into
UVA and UVB;
c) modification to normalized relative spectral distribution of global solar radiation based on 10 nm
wavelength intervals;
d) ambiguity relating to the area-weighting procedure for screen printed glass has been clarified;
e) introduction of a matrix method for non-scattering incoherent optical systems, including multiple
layers;
f) modifications to the formulae to permit calculation and declaration of the luminous and solar
properties of BIPV glazing.
Introduction
Whilst this document presents the formulae for the exact calculations of the spectral characteristics of
glazing, it does not consider the uncertainty of the measurements necessary to determine the spectral
parameters that are used in the calculations. It should be noted that, for simple glazing systems where
few measurements are required, the uncertainty of the results will be satisfactory if correct
measurements procedures have been followed. When the glazing systems become complex and a large
number of measurements are required to determine the spectral parameters, the uncertainty is
cumulative with the number of measurements and should be considered in the final results.
The term interface used in this document, is considered to be a surface characterized by its transmission
and reflections of light intensities. That is, the interaction with light is incoherent, all phase information
being lost. In the case of thin films (not described in this document), interfaces are characterized by
transmission and reflections of light amplitudes, i.e. the interaction with light is coherent and phase
information is available. Finally, for clarity, a coated interface can be described as having one or more
thin films, but the entire stack of thin films is characterized by its resulting transmission and reflection
of light intensities.
In Annex B, the procedure for the calculation of spectral characteristics of laminated glass makes specific
reference to coated glass. The same procedure can be adopted for filmed glass (e.g. adhesive backed
polymeric film applied to glass).
1 Scope
This document specifies methods of determining the luminous and solar characteristics of glazing in
buildings. These characteristics can serve as a basis for lighting, heating and cooling calculations of
rooms and permit comparison between different types of glazing.
This document applies both to conventional glazing and to a
...
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