1、BRITISH STANDARDBS EN 13363-2:2005Solar protection devices combined with glazing Calculation of total solar energy transmittance and light transmittance Part 2: Detailed calculation methodThe European Standard EN 13363-2:2005 has the status of a British StandardICS 17.180.20; 91.120.10g49g50g3g38g50
2、g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 13363-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Com
3、mittee on 30 June 2006 BSI 2006ISBN 0 580 48616 8National forewordThis British Standard is the official English language version of EN 13363-2:2005, including corrigendum April 2006. The UK participation in its preparation was entrusted to Technical Committee B/540, Energy performance of materials,
4、components and buildings, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BS
5、I Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for i
6、ts correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests i
7、nformed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 24, an inside back cover and a back cover.The BSI copyright notice displayed in this document ind
8、icates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13363-2April 2005ICS 17.180.20; 91.120.10English versionSolar protection devices combined with glazing Calculation oftotal solar energy transmittance an
9、d light transmittance Part 2:Detailed calculation methodDispositifs de protection solaire combins des vitrages Calcul du facteur de transmission solaire et lumineuse Partie 2: Mthode de calcul dtailleSonnenschutzeinrichtungen in Kombination mitVerglasungen Berechnung der Solarstrahlung und desLichtt
10、ransmissionsgrades Teil 2: DetailliertesBerechnungsverfahrenThis European Standard was approved by CEN on 24 February 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard witho
11、ut any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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
12、 by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Gree
13、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue
14、 de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13363-2:2005: EEN 13363-2:2005 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms, definitions, symbols and units 4 3.1 Terms
15、 and definitions .4 3.2 Symbols and units.5 4 Characteristic data.6 4.1 Solid layers.6 4.2 Gas spaces .6 5 Principles of calculation .6 5.1 General6 5.2 Solar radiation and light7 5.3 Heat transfer.9 5.4 Energy balance 13 6 Boundary conditions.13 6.1 Reference and summer conditions13 6.2 Report .14
16、Annex A (normative) Determination of equivalent solar and light optical characteristics for louvres or venetian blinds.16 A.1 Assumptions 16 A.2 Symbols 16 A.3 Direct radiation.17 A.4 Diffuse radiation.17 A.5 Thermal radiation.17 A.6 Global radiation17 A.7 Example 18 Annex B (normative) Stack effect
17、 19 B.1 General19 B.2 Pressure loss factors 20 Annex C (informative) Example22 C.1 Input data22 C.2 Results 22 Annex D (informative) Physical properties of gases .23 Bibliography 24 EN 13363-2:2005 (E) 3 Foreword This document (EN 13363-2:2005) has been prepared by Technical Committee CEN/TC 89 “The
18、rmal 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 October 2005, and conflicting national standards sh
19、all be withdrawn at the latest by October 2005. EN 13363 with the general title Solar protection devices combined with glazing - Calculation of solar and light transmittance consists of two parts: Part 1: Simplified method; Part 2: Detailed calculation method. This document includes a Bibliography.
20、According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Esto-nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
21、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 13363-2:2005 (E) 4 1 Scope This document specifies a detailed method, based on the spectral transmission data of the materials, comprising the solar protection d
22、evices and the glazing, to determine the total solar energy transmittance and other relevant solar-optical data of the combination. If spectral data are not available the methodology can be adapted to use in-tegrated data. The method is valid for all types of solar protection devices parallel to the
23、 glazing such as louvres, or venetian, or roller blinds. The blind may be located internally, externally, or enclosed between the panes of the glazing. Ventilation of the blind is allowed for in each of these positions in determining the solar energy absorbed by the glazing or blind components, for
24、vertical orientation of the glazing. The blind component materials may be transparent, translucent or opaque, combined with glazing components with known solar transmittance and reflectance and with known emissivity for thermal radiation. The method is based on a normal incidence of radiation and do
25、es not take into account an angular dependence of transmittance or reflectance of the materials. Diffuse irradiation or radiation diffused by solar protection devices is treated as if it were direct. Louvres or venetian blinds are treated as homogenous materials by equivalent solar optical character
26、istics, which may depend on the angle of the incidence radiation. For situations outside the scope of this document; ISO 15099 covers a wider range of situations. The document also gives certain normalised situations, additional assumptions and necessary boundary conditions. 2 Normative references T
27、he 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 luminou
28、s and solar characteristics of glazing EN 673, Glass in building Determination of thermal transmittance (U value) Calculation method EN ISO 7345:1995, Thermal insulation Physical quantities and definitions (ISO 7345:1987) EN ISO 9288:1996, Thermal insulation Heat transfer by radiation Physical quant
29、ities and definitions (ISO 9288:1989) 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, EN ISO 9288:1996 and the following apply. 3.1.1 solar radiation and light radiation in the whole solar spect
30、rum or any part of it, comprising ultra-violet, visible and near infra-red radiation in the wavelength range of 0,3 m to 2,5 m NOTE Sometimes called shortwave radiation, see EN ISO 9488. EN 13363-2:2005 (E) 5 3.1.2 thermal radiation radiation emitted by any surface at or near ambient temperature in
31、the far infrared in the wavelength range of 3 m to 100 m NOTE 1 The definition deviates from EN ISO 9288. NOTE 2 Sometimes called longwave radiation, see EN ISO 9488. 3.1.3 total solar energy transmittance total transmitted fraction of the incident solar radiation consisting of direct transmitted so
32、lar radiation and the part of the absorbed solar radiation transferred by convection and thermal radiation to the internal environment 3.1.4 light transmittance transmitted fraction of the incident solar radiation in the visible part of the solar spectrum, see EN 410 3.1.5 normalized radiant flow ra
33、te radiant flow rate divided by the incident radiant flow rate 3.2 Symbols and units The following list includes the principal symbols used. Other symbols are defined where they are used in the text. Symbol Physical quantity Unit ESincident solar radiation flow rate, solar irradiation W/m I normalis
34、ed radiant flow rate H height of a ventilated space m T thermodynamic temperature K U thermal transmittance W/(mK) g total solar energy transmittance (solar factor) h heat transfer coefficient, or thermal conductance of gas space W/(mK) q density of heat flow rate W/m s width of a space m z vertical
35、 coordinate m thermal emissivity absorptance esolar direct absorptance thermal conductivity W/(mK) wavelength m reflectance of the side facing the incident radiation reflectance of the side facing away from the incident radiation esolar direct reflectance v light reflectance Stefan-Boltzmann constan
36、t 5,6710-8W/(mK4) esolar direct transmittance EN 13363-2:2005 (E) 6 vlight transmittance Subscripts a absorbed c conductive/convective d diffuse e external environment g gas i internal environment j, k integer, number of layer or space r radiant th thermal radiation v ventilated B blind D direct 4 C
37、haracteristic data 4.1 Solid layers The glass panes and blinds are considered as solid layers. The relevant characteristics are: for solar radiation and light: the spectral transmittance and the spectral reflectances of both sides; for thermal radiation: the transmittance and the emissivities of bot
38、h sides. Usually, these values are determined directly by the most appropriate optical method1). For glazing, see the procedures recommended for glazing materials in EN 410. However, for louvres or venetian blinds, Annex A gives a method to calculate equivalent values based on similarly determined m
39、aterial properties. 4.2 Gas spaces The thermal properties of closed spaces filled with air or gas shall be calculated in accordance with EN 673. The spaces are described by their width and the physical properties of the gas (see Annex D, Table D.1). Ventilated air spaces are described by the width a
40、nd the height of the space and the physical properties of the air. 5 Principles of calculation 5.1 General The combination of glazing and solar protection devices consists of a series of solid layers separated by air or gas filled spaces. The solid layers are assumed to be homogeneous with a negligi
41、ble thermal resistance. The transport of solar radiation and heat is considered to be one-dimensional, except for ventilated spaces, where the two-dimensional convection is reduced to a one-dimensional formula. 1)See CIE Technical Report CIE 130-1998 “Practical Methods for the measurement of reflect
42、ance and transmittance“. EN 13363-2:2005 (E) 7 The layers and spaces are numbered by j from 1 to n, where space n represents the internal environment and space 0 the external environment. Within the physical model the number of layers is unlimited. The basic formulae for solar radiation and heat tra
43、nsfer are given to establish the energy balance of each layer. To solve the system of equations the use of an iterative procedure is recommended, due to the non-linear interaction of temperature and heat transport. Key Teexternal air temperature 1 external 7 internal Treexternal radiant temperature
44、2 layer 1 8 solar radiation veexternal wind velocity 3 space 1 9 direct solar and light transmittance Tiinternal air temperature 4 layer j 10 direct solar and light reflectance Triinternal radiant temperature 5 space j 11 thermal radiation and convection 6 layer n (direct and indirect) NOTE The inte
45、rnal and external environments are characterised by the air temperature and the radiant temperature; the external environment is additionally characterised by the wind velocity. Figure 1 Schematic presentation of a system consisting of layers and spaces 5.2 Solar radiation and light The solar and op
46、tical properties are independent of the intensity of the solar irradiation and temperature in the system2). It is assumed that the spaces are completely transparent, without any absorption. Each solid layer is characterised by the spectral transmittance and reflectance in the wavelength region betwe
47、en 0,3 m and 2,5 m. For each wavelength and each layer j the following equations are valid for the normalised radiant flow rates I and I (see Figure 2): )()()()()()()()()()(111jjjjjjjjjjIIIIII+=+=(1) where 2)There are exceptions for certain materials (photochromic, thermochromic). EN 13363-2:2005 (E
48、) 8 j() is the spectral transmittance of the side facing the incident radiation; j() is the spectral transmittance of the side facing away from the interior3); j() is the spectral reflectance of the side facing the incident radiation; j() is the spectral reflectance of the side facing away from the
49、incident radiation; Ij() is the spectral normalised radiant flow rate inwards; Ij() is the spectral normalised radiant flow rate outwards. Figure 2 Schematic presentation of the characteristic data of layer j and the spectral flow rates Equation (1) is solved with the boundary conditions: 0)(;1)(0= nII (2) If the spectral normalised radiant flow rates )(jI and )(jI are known for each j, the spectral data of the system result in: t
