Abstract
The transparent surface of low-temperature solar devices is insulated with glass or polyethylene. Ensuring more light penetration from such surfaces ensures efficient operation of the device, in other words, the device has a high efficiency. Selecting the device design to allow most of the sunlight falling on the transparent surface to enter the device, keeping the transparent surface clean, reducing the angle of incidence of the light to small values, and so on. In most cases, it depends on the parameters. In this article, we analyze the theoretical and practical solutions of work related to the selection and optimization of the angle of incidence of light on the transparent surface of the device to increase the incidence of sunlight during the day. Light absorption, rotation and absorotion of light into low- temperature solar cells. Mathematical analysis and formulas are given.
Highlights
As sunlight passes through the glass surface of the device, part of it passes, another part returns from the glass, and another part is absorbed by the glass material (Figure 1)
Where: E0 - the intensity of light incident on the glass surface, Eo't - the intensity of light passing through the glass surface, Eqayt - the intensity of light returning from the glass surface, Eyut - the intensity of light absorbed through the glass.The absorption of light in glass by the passage of sunlight through glass insulation of thickness δ can be determined according to Buger's-Lamber law
We determine the value of this coefficient for ordinary window glass, which is widely used in solar devices.It is known that when light passes through a transparent object, the coefficients of the light passing through the glass, returning from the glass and absorbed by the glass in relation to the incident light are as follows: The coefficient of reflected light: qayt Eqayt E0 αyut = Eyut
Summary
As sunlight passes through the glass surface of the device, part of it passes, another part returns from the glass, and another part is absorbed by the glass material (Figure 1). Where: E0 - the intensity of light incident on the glass surface, Eo't - the intensity of light passing through the glass surface, Eqayt - the intensity of light returning from the glass surface, Eyut - the intensity of light absorbed through the glass.The absorption of light in glass by the passage of sunlight through glass insulation of thickness δ can be determined according to Buger's-Lamber law. Where; k is the attenuation coefficient of the beam:The value of this coefficient depends on the chemical nature of the transparent object and the wavelength ( ) of the light incident on it
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