Rolled Solar Reflecting Plate Orientation for Better Light Condensing
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Solution Overview
Problem
Existing solar light reflecting plates in solar thermal power generation systems face a trade-off between improved diffuse reflectance and reduced regular reflectance, which affects light condensing properties and power generation efficiency.
Innovation Solution
A solar light reflecting plate with a rolled substrate and specific surface roughness (0.02 µm to 1.0 µm) is oriented at an angle of 80° to 100° relative to the heat collecting tube, incorporating a metal-containing reflective film and a protective film, to enhance light condensing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the surface roughness of the reflective film is reduced to improve regular reflectance, then regular reflectance is improved, but light condensing property is not necessarily secured
Solution Approach 1:
The invention optimizes the surface roughness parameter to a specific range (0.02-1.0 μm Ra) that balances regular reflectance with light condensing property, preventing the trade-off from occurring
Solution Approach 2:
The invention introduces directional orientation of the rolled substrate as a dynamic parameter, allowing the light condensing property to be controlled independently of surface roughness through angular adjustment (80°-100° relative to heat collecting tube)
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration achieves an excellent light condensing property, ensuring efficient solar light collection and heat transfer, as evidenced by a light condensing rate of 80% or more, thereby improving solar thermal power generation efficiency.
Implementation Method 1
a solar light reflecting plate that reflects and condenses solar light
Implementation Method 2
a heat collecting tube that receives the solar light condensed by the solar light reflecting plate and is heated by the condensed solar light
Data Source
Figure 1~2
Figure 3~5
Figure 6(A)~7(B)
AI summary
A solar light reflecting plate used for a light condensing and heat collecting device which includes a solar light reflecting plate that reflects and condenses solar light and a heat collecting tube that receives the solar light condensed by the solar light reflecting plate and is heated by the condensed solar light, in which the solar light reflecting plate includes at least a rolled substrate, in which a surface roughness of a solar light reflecting surface that is an outermost surface and that reflects solar light is within a range of 0.02 µm to 1.0 µm in terms of arithmetic mean roughness Ra, and in which the solar light reflecting plate is disposed so that an angle between a rolling direction of the substrate and a longitudinal direction of the heat collecting tube is within a range of 80° to 100°.