BS EN 13363-1:2003+A1:2007 Solar protection devices combined with glazing. Calculation of solar and light transmittance. Simplified method
BS EN 13363-1 specifies 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 resulting g-values of the simplified method given here are approximate and their deviation from the exact values lie within the range between +0,10 and -0,02. 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 simplified method is based on the normal incidence of radiation and does not take into account either the angular dependence of transmittance and the reflectance or the differences of spectral distribution.
Contents of BS EN 13363-1:
Foreword
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
4 Characteristic data
4.1 Glazing
4.2 Solar protection devices
5 Total solar energy transmittance
5.1 External solar protection device
5.2 Internal solar protection device
5.3 Integrated solar protection device
6 Light transmittance
7 Solar direct transmittance
Annex A (informative) Data for typical glazing and solar protection devices
Annex B (informative) Example of calculation of a solar protection device in combination with glazing
