UV Light Biofouling Removal System for Underwater Surfaces
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Solution Overview
Problem
Existing anti-biofouling methods for underwater surfaces, such as ship hulls, require frequent reapplication of chemicals and result in environmental concerns and reduced reliability, while existing solutions for removing biofouling once formed often necessitate removing the surface from the water, incurring high costs and downtime.
Innovation Solution
A system utilizing ultraviolet light sources and transmission media to distribute UV light over the surface, combined with a degradable layer that changes mechanical properties in response to UV exposure, facilitating the removal of biological material without chemicals, thereby reducing the need to remove the surface from the water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If chemical anti-biofouling systems are used, then biofouling prevention is achieved, but environmental harm increases and reliability decreases
Solution Approach 1:
The patent replaces chemical systems with a physical system using ultraviolet light sources to prevent biofouling. The UV light sources emit ultraviolet radiation that creates a biocidal effect without releasing chemicals into the environment, thereby eliminating environmental harm while maintaining biofouling prevention effectiveness.
Solution Approach 2:
The patent changes the fundamental parameter of anti-biofouling from chemical concentration to ultraviolet light intensity and wavelength. By using specific ultraviolet wavelengths (particularly UVC band at 200-280 nm), the system achieves biocidal effects through photon energy rather than chemical reactions, improving reliability by eliminating chemical degradation issues.
2Object-affected harmful factors
If chemical anti-biofouling systems are used, then biofouling prevention is achieved, but system reliability decreases due to ocean environment exposure
Solution Approach 1:
The patent replaces vulnerable chemical systems with robust ultraviolet light sources that are not affected by ocean pressure, temperature, or salinity. The solid-state UV LED sources or arc lamps are sealed in protective housings, making them highly reliable in harsh marine environments compared to chemical dispensing systems.
Solution Approach 2:
The ultraviolet light sources automatically maintain their anti-biofouling function without requiring external intervention for chemical replenishment or system adjustment. The system self-regulates through continuous or periodic UV emission, eliminating the reliability issues associated with chemical system maintenance in ocean environments.
3Object-generated harmful factors
If biofouling is allowed to form and then removed, then chemical use is reduced, but surface removal from water is required resulting in high cost and downtime
Solution Approach 1:
The patent applies ultraviolet light treatment continuously or periodically to prevent biofouling accumulation in the first place, rather than allowing fouling to form and then requiring surface removal. This preliminary preventive action keeps the surface clean during operation, eliminating downtime and avoiding the need for dry dock interventions.
Solution Approach 2:
The ultraviolet light sources operate continuously or on scheduled intervals to maintain constant anti-biofouling protection. This continuous useful action prevents biofouling formation throughout the operational lifecycle of the surface, eliminating periodic interruptions for cleaning and maintaining continuous operational efficiency.
4Object-affected harmful factors
If anti-biofouling coatings are reapplied frequently, then biofouling prevention is maintained, but operational cost and downtime increase
Solution Approach 1:
The patent replaces consumable anti-biofouling coatings with durable ultraviolet light sources that do not degrade or require reapplication. The UV sources have long operational lifetimes and maintain consistent performance, eliminating the productivity losses associated with frequent coating reapplication and dry dock visits.
Solution Approach 2:
The ultraviolet light sources automatically maintain their anti-biofouling function throughout their operational lifetime without requiring external intervention for reapplication or maintenance. This self-service capability eliminates operational downtime and maintains high productivity compared to systems requiring frequent coating renewal.
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
Effectively removes biofouling from underwater surfaces without chemical use, reducing the need for frequent surface removal and minimizing environmental impact, while maintaining surface integrity and operational efficiency.
Implementation Method 1
Ultraviolet (UV) radiation consists of electromagnetic radiation between visible violet light and x-rays
Implementation Method 2
Ultraviolet germicidal irradiation (UVGI) is a sterilization method that uses specific UVC wavelengths (about 260 nm, e.g., 253.7 nm) to break down and kill microorganisms
Implementation Method 3
These mechanisms prevent biofouling on surfaces through localized production of bleach, via an oxidation of chloride ions present in seawater
Data Source
AI summary
A system includes a UV light source and an optical medium coupled to receive UV light from the UV light source. The optical medium is configured to emit UV light proximate to a surface from which biofouling is to be removed once the biofouling has adhered to the protected surface. A method corresponds to the system.