Solar transmittance is defined as the ratio of solar radiation perpendicularly incident on window glass that is transmitted through the glass and calculated according to a formula specified in JIS R 3106 Testing method on transmittance, reflectance and emittance of flat glasses and evaluation of solar heat gain coefficient.
The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around 4%, around 4% on the back, and 1% absorption. In addition, there are double reflections within the glass, which is in the order of 0.2%.
JIS regulates solar transmittance as an index of the transmission characteristics of sunlight, which includes visible to near-infrared light. In this example, several types of glass were measured using a UV-3600 UV-VIS-NIR spectrophotometer and their solar transmittance was calculated using solar transmittance software.
Solar transmittance measurement software* is used to calculate solar transmittance (or reflectance) values from transmittance (or reflectance) spectra according to the specified formula. * This software can only be used to calculate values for single panes of glass and cannot be used for multiple panes of glass.
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In this paper we analyse the spectral transmission of solar radiation of widely used materials using the transmittance parameter. The measurements were performed on clear …
Transmittance is the key factor to the quality of solar glass. At present visible light transmittance (380-780 nm) and solar direct transmittance (300-2500 nm) were used to evaluate the light …
Solar Factor or Total Solar Energy Transmittance or g-value (g%) is the total solar radiation transmitted by the glass. Shading Coefficient (sc) is Solar Factor divided by 0.87. It is a …
More info about Solar Glass – Optical Properties The efficiency of solar glass is evaluated using the following parameters: Optical transmission Transmission measurement for wave-lengths in …
The TI-system modelled consisted of a 6 mm outer glass pane, a 22 mm wide polymethylmethacrylate (PMMA) capillary cell section and an 8 mm inner glass pane. When …
The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around …
1 Introduction Thanks to the use of nanotechnology and the introduction of morphological changes of the glass surface used in the manufacture of solar glasses, D.A. Glass Company, were …
Transmittance is the key factor to the quality of solar glass. At present visible light transmittance (380-780 nm) and solar direct transmittance (300-2500 …
UV-3600i Plus UV-VIS Spectrophotometer Solar transmittance is defined as the ratio of solar radiation perpendicularly incident on window glass that is transmitted through the …
Solar transmittance is defined as the ratio of solar radiation perpendicularly incident on window glass that is transmitted through the glass and calculated according to a formula …
The transmittance of conventional uncoated solar glass at a vertical incidence of light is approximately 91%. The front reflects around 4%, around 4% on the back, and 1% …
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