Composite Solar Reflector With Integrated Mounting and Silver Coating
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Solution Overview
Problem
Conventional solar reflectors in concentrated solar power plants are fragile, heavy, and inefficient due to their glass composition, leading to high production and maintenance costs, as well as reduced energy yield from light absorption and curvature issues.
Innovation Solution
A solar reflector composed of a thermosetting or thermoplastic resin reinforced with cut fibres, featuring a silver-based metallic coating and integrated attachment elements, which reduces weight, fragility, and increases reflectance while eliminating the need for adhesives and complex curvature processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glass reflectors are used to ensure durability and light reflection, then reflectance is maintained, but weight increases significantly and fragility remains
Solution Approach 1:
The patent applies composite materials by combining a metallic substrate (aluminum or steel) with a dielectric coating layer. This composite structure provides both the mechanical strength and durability of the metal substrate and the high reflectance properties of the dielectric coating, while being significantly lighter than glass reflectors. The metallic substrate serves as the structural backbone, eliminating the weight and fragility issues of glass while maintaining reliability.
Solution Approach 2:
The patent extracts the essential function of light reflection from the glass material and transfers it to a thin dielectric coating layer applied on a metallic substrate. By separating the structural support function (performed by the thin metallic substrate) from the optical function (performed by the dielectric coating), the design eliminates the need for thick glass while maintaining both durability and reflectance.
2Strength
If glass thickness is increased to 4-5mm for mechanical strength, then structural integrity is improved, but light energy absorption increases and weight increases
Solution Approach 1:
The composite structure of a thin metallic substrate combined with a dielectric coating provides structural integrity without requiring thick materials. The metallic substrate (typically 0.5-2mm thick) offers sufficient mechanical strength, while the dielectric coating layer provides the optical performance, together achieving both strength and low light absorption in a thin-profile design.
Solution Approach 2:
The patent changes the material parameters by transitioning from thick glass (4-5mm) to a thin metallic substrate (0.5-2mm) with a dielectric coating. This parameter change in material selection and thickness reduces light absorption significantly while maintaining structural integrity through the chosen metallic materials and coating optimization.
3Reliability
If multiple protective coating layers are applied to glass reflectors, then reflector integrity is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent uses a composite material system where the metallic substrate inherently provides corrosion resistance and mechanical strength, reducing the need for multiple protective coating layers. The dielectric coating serves primarily for optical enhancement rather than protection, simplifying the overall coating structure compared to traditional glass reflectors that require multiple protective layers.
4Manufacturing precision
If glass reflectors are curved on-site for tower plants, then proper light focusing is achieved, but damage risk increases and substantial means are required
Solution Approach 1:
The patent applies preliminary action by pre-curving the metallic substrate to the required shape before applying the dielectric coating. This allows the reflector to be manufactured with precise curvature in a controlled factory environment, eliminating the need for on-site curving operations that risk damaging the reflector or requiring substantial equipment.
Solution Approach 2:
The composite structure of metallic substrate with dielectric coating provides sufficient flexibility and strength to allow pre-curving to precise specifications. The metallic substrate can be formed into the required curved shape while maintaining structural integrity, and the subsequent dielectric coating adheres to this pre-formed shape, achieving manufacturing precision without on-site damage risk.
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
The solution results in a more durable, lightweight, and efficient reflector with improved reflectance, reducing production and maintenance costs, and enabling larger-scale deployment of concentrated solar power plants with enhanced energy yield.
Implementation Method 1
a reflective surface, then focusing these rays onto the surface of a receiver composed of material which absorbs this radiation
Implementation Method 2
material which absorbs this radiation and which converts this concentrated light energy (radiation) into heat
Implementation Method 3
A solar reflector in composite material, based on thermosetting or thermoplastic resin reinforced with cut fibres
Data Source
AI summary
The invention relates to a solar reflector for concentrated solar power plants, comprising a substrate a) in composite material based on resin reinforced with cut fibers, said substrate having means b) for attachment without either perforation or gluing, and a metallic reflective coating layer c). The reflector of the invention is used in solar collectors and in solar plants operating on concentrated solar power, more particularly for producing electricity, steam and/or heat.