Transparent Electrodynamic Screen for Dust-Free Solar Panels
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Solution Overview
Problem
Solar photovoltaic and solar thermal systems face significant power losses due to dust deposition, especially in arid and desert regions, where existing cleaning methods are inefficient, require water, or have durability issues, and pose challenges in manufacturing and retrofitting with self-cleaning technologies.
Innovation Solution
The development of transparent electrodynamic screens (EDS) with rows of parallel electrodes embedded in a dielectric film, activated by phased voltage to electrostatically charge and remove dust without water or mechanical action, integrated into solar panels and concentrators for efficient and automatic dust removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If manual cleaning with water and detergents is used, then dust removal is achieved, but water consumption increases and cleaning efficiency is low
Solution Approach 1:
The patent replaces manual mechanical cleaning with an electrodynamic screen system that uses electric fields to remove dust particles automatically. The EDS applies electrostatic forces to levitate and remove dust without requiring water or manual intervention, thus eliminating water consumption while maintaining high cleaning efficiency through automated operation.
Solution Approach 2:
The electrodynamic screen enables solar panels to clean themselves automatically without external human intervention or water resources. The system self-regulates by detecting dust accumulation and activating the electric field to remove particles, making the cleaning process autonomous and independent of water supply.
2Object-affected harmful factors
If hydrophilic TiO2 coating is applied, then dust adhesion is reduced, but reflection loss increases and UV radiation is required
Solution Approach 1:
The patent replaces chemical surface modification (TiO2 coating) with a physical electrodynamic field-based cleaning system. Instead of relying on surface chemistry to prevent dust adhesion, the EDS uses electric fields to actively remove dust particles, avoiding the reflection losses associated with high-refractive-index coatings and eliminating the need for UV activation.
Solution Approach 2:
The system changes the approach from modifying surface chemical properties (hydrophilicity through TiO2) to applying external physical fields (electric fields). This parameter change allows dust removal without the energy losses and activation requirements inherent in photochemical approaches.
3Object-affected harmful factors
If hydrophobic surface treatment is applied, then dust adhesion is minimized, but durability decreases under outdoor conditions
Solution Approach 1:
The patent replaces surface treatment methods (hydrophobic coatings) with an active electrodynamic field system. Instead of relying on delicate surface chemistry that degrades under UV exposure, the EDS uses robust electric fields that are not subject to environmental degradation, ensuring long-term reliability while maintaining effective dust removal.
4Productivity
If electrodynamic screen is integrated on solar panels, then dust removal efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The electrodynamic screen is divided into multiple independent electrode segments that can be manufactured separately and then assembled onto solar panels. This segmentation allows for standardized production of electrode modules that can be easily integrated into existing solar panel frameworks, reducing overall manufacturing complexity despite the advanced functionality.
Solution Approach 2:
The electrodynamic screen system is designed to be universally applicable to different solar panel types and configurations. The electrode structures and power supply systems can serve multiple functions including dust removal, potential snow removal, and surface monitoring, which amortizes the manufacturing complexity across multiple uses and applications.
5Productivity
If EDS electrodes are placed on solar panel surface, then dust removal is effective, but solar radiation obscuration occurs
Solution Approach 1:
The electrodes are embedded within or mounted on extremely thin transparent dielectric films that are optimized for maximum light transmission. These thin films allow solar radiation to pass through to the photovoltaic cells while providing a substrate for the electrodynamic electrodes, thus maintaining high energy transmission while enabling effective dust removal functionality.
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
Achieves over 90% dust removal with minimal energy consumption, addressing the inefficiencies of existing methods and providing a scalable, durable, and cost-effective solution for both new and existing solar energy systems.
Implementation Method 1
When the electrodes are activated by phased voltage, the dust particles on the surface of the film become electrostatically charged and are removed by the alternating electric field.
Implementation Method 2
the dust particles on the surface of the film become electrostatically charged and are removed by the alternating electric field
Data Source
AI summary
A transparent electrodynamic screen (EDS) enables automatic removal of dust to protect and enhance performance of solar collectors and similar components. A pattern of transparent conductive electrodes are deposited over a glass or polymer outer surface of a solar collector, and embedded under a thin, transparent dielectric fluoropolymer film or silicon dioxide coating. When energized by three-phase voltages at frequencies in the range 5 to 20 Hz, the electrodes produce an oscillating electric field and a traveling electrodynamic wave that charges the particles on the surface and exerts coulomb and dielectrophoretic forces to lift the dust from the surface and transport it to an edge of the collector, thereby clearing the screen. The EDS can be incorporated in the collector in an integrated way during manufacture or retrofitted to existing conventional collectors.