Rolled Solar Reflector Orientation for Better Light Condensing
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Solution Overview
Problem
Existing solar light reflecting plates for solar thermal power generation face challenges in achieving high regular reflectance and light condensing properties, with reduced surface roughness not necessarily ensuring improved power generation efficiency.
Innovation Solution
A solar light reflecting plate with a rolled substrate and surface roughness between 0.02 μm to 1.0 μm, disposed at an angle of 80° to 100° relative to the heat collecting tube, combined with a metal-containing reflective film and protective film, enhances light condensing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If surface roughness is reduced to improve regular reflectance, then regular reflectance is improved, but light condensing property is not necessarily improved
Solution Approach 1:
The invention optimizes the surface roughness parameter to a specific range (0.02-1.0 μm Ra) that simultaneously achieves high regular reflectance and excellent light condensing properties. This parameter optimization resolves the contradiction by finding the optimal value that satisfies both requirements
2Illumination intensity
If surface roughness is reduced to improve regular reflectance, then regular reflectance is improved, but power generation efficiency is not necessarily improved
Solution Approach 1:
By optimizing surface roughness to 0.02-1.0 μm Ra and controlling the angle between rolling direction and heat collecting tube (80°-100°), the invention achieves both high regular reflectance and improved power generation efficiency, resolving the contradiction between these two parameters
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, as evidenced by a light condensing rate of 80% or more, improving the efficiency of solar thermal power generation.
Implementation Method 1
a solar light reflecting plate which reflects and condenses solar light
Implementation Method 2
a solar light reflecting plate that condenses solar light
Implementation Method 3
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
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, wherein the solar light reflecting plate includes at least a rolled substrate, a surface roughness of a solar light reflecting surface that is an outermost surface and that reflects solar light is 0.02 μm to 1.0 μm in terms of arithmetic mean roughness Ra, and 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 80° to 100°.