Adaptive UV Anti-Biofouling System with Optical Sensor
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Solution Overview
Problem
Current anti-biofouling systems face limitations in energy efficiency and longevity due to the use of UV LEDs with limited wall plug efficiency and lifetime, and they often require constant UV radiation application without adapting to varying degrees or types of fouling, leading to inefficient biofouling prevention.
Innovation Solution
An adaptive anti-biofouling system that integrates a UV-emitting element with a radiation exit window and an optical sensor, allowing for dynamic control of UV radiation intensity and spectral distribution based on real-time fouling detection, using the same LEDs for both fouling prevention and sensing, and optionally incorporating multiple wavelengths to distinguish fouling types and adjust the output accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV radiation is applied continuously to prevent biofouling, then biofouling prevention effectiveness is improved, but energy consumption increases
Solution Approach 1:
The system uses periodic UV radiation pulses instead of continuous irradiation. The control unit activates the UV light source in periodic intervals based on fouling sensor feedback, maintaining anti-fouling effectiveness while significantly reducing energy consumption during periods when fouling levels are acceptable.
Solution Approach 2:
The system dynamically adjusts UV radiation intensity and duration based on real-time fouling conditions detected by sensors. The control unit modulates the UV light source output according to the severity of fouling, applying maximum intensity only when necessary and reducing or stopping irradiation when fouling levels are within acceptable thresholds.
2Reliability
If high intensity UV radiation is used to prevent biofouling, then biofouling prevention effectiveness is improved, but UV LED lifetime decreases
Solution Approach 1:
By implementing periodic UV radiation pulses rather than continuous operation, the system reduces the cumulative operating hours of the UV LEDs while maintaining effective anti-fouling coverage. This extends the operational lifetime of the UV light sources.
Solution Approach 2:
The system dynamically adjusts UV radiation intensity based on fouling sensor feedback, applying high intensity only when fouling is detected and using lower or zero intensity when surfaces are clean. This reduces the total energy exposure and operational stress on the UV LEDs, extending their lifetime.
3Reliability
If UV radiation intensity is increased to handle severe fouling, then biofouling removal effectiveness is improved, but energy consumption increases
Solution Approach 1:
The control unit dynamically adjusts UV radiation intensity in response to fouling sensor readings. When severe fouling is detected, the system increases intensity to effective levels; when fouling is minimal or absent, the system reduces or stops irradiation, optimizing energy consumption while maintaining removal effectiveness when needed.
Solution Approach 2:
The system uses optical sensors to continuously monitor fouling conditions and provides feedback to the control unit, which adjusts UV radiation intensity accordingly. This closed-loop control ensures energy is consumed only at levels necessary to address actual fouling conditions, avoiding waste from excessive irradiation.
4Reliability
If constant UV radiation is applied without adaptation, then biofouling prevention is maintained, but energy efficiency deteriorates
Solution Approach 1:
The system transitions from static constant UV radiation to dynamic adaptive irradiation. The control unit continuously monitors fouling conditions and adjusts UV light source activation and intensity in real-time, maintaining prevention effectiveness while eliminating energy waste from unnecessary continuous operation.
Solution Approach 2:
Optical sensors provide continuous feedback on surface fouling conditions to the control unit, which adjusts UV radiation application accordingly. This feedback mechanism ensures UV radiation is applied only when and where needed, dramatically improving energy efficiency while maintaining biofouling prevention.
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 approach reduces energy consumption, extends the system's lifetime, and optimizes biofouling prevention by dynamically adjusting UV radiation based on fouling conditions, enhancing the efficiency of biofouling reduction on submerged objects such as vessels and infrastructural elements.
Implementation Method 1
an optical sensor configured to sense radiation emanating from said downstream window side
Implementation Method 2
a light source configured to provide radiation, selected from one or more of UV, visible and IR
Implementation Method 3
said radiation exit window comprises an upstream window side and a downstream window side
Data Source
AI summary
The invention provides an anti-biofouling system (200) comprising an UV-emitting element (210), wherein the UV-emitting element (210) comprises a UV radiation exit window (230), wherein the UV-emitting element (210) at least partly encloses a light source (220) configured to provide UV radiation (221), wherein the UV radiation exit window (230) is configured to transmit at least part of the UV radiation (221) of the light source (220), wherein the UV radiation exit window (230) comprises an upstream window side (231) and a downstream window side (232), wherein the UV-emitting element (210) also at least partly encloses an optical sensor (310) configured to sense radiation (421) emanating from the downstream window side (232) and configured to provide a corresponding optical sensor signal, wherein the anti-biofouling system (200) is further configured to provide said UV radiation (221) in dependence of said optical sensor signal.