Standard Test Methods for Solar Energy Transmittance and Reflectance (Terrestrial) of Sheet Materials

Importancia y uso:

5.1 Solar-energy transmittance and reflectance are important factors in the heat admission through fenestration, most commonly through glass or plastics. (See Appendix X3.) These methods provide a means of measuring these factors under fixed conditions of incidence and viewing. While the data may be of assistance to designers in the selection and specification of glazing materials, the solar-energy transmittance and reflectance are not sufficient to define the rate of heat transfer without information on other important factors. The methods have been found practical for both transparent and translucent materials as well as for those with transmittances reduced by highly reflective coatings. Method B is particularly suitable for the measurement of transmittance of inhomogeneous, patterned, or corrugated materials since the transmittance is averaged over a large area.

Subcomité:

E44.20

Referida por:

G0214-23, D4851-07R19E01, E0903-20

Volúmen:

12.02

Número ICS:

81.040.20 (Glass in building), 81.040.30 (Glass products)

Palabras clave:

pyranometer; reflectance; solar energy; spectrophotometer; terrestrial reflectance; transmittance;