Floating Wind Turbine Ballast Control for Mean Inclination
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Solution Overview
Problem
Floating offshore wind turbine (FOWT) platforms experience significant mean inclinations due to increasing overturning moments, especially with larger wind turbines, leading to reduced power production efficiency, structural instability, and high maintenance costs, as conventional ballast transfer systems are slow, energy-intensive, and prone to mechanical failures.
Innovation Solution
A method for independently adjusting ballast water levels within each column of a FOWT platform, using redundant systems to quickly counterbalance inclination, monitored by a command center, ensuring swift and reliable adjustments without long-distance transfers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ballast water is transferred between columns using conventional systems, then platform inclination can be counterbalanced, but the response time is slow (15-30 minutes) and energy consumption is high
Solution Approach 1:
The patent divides the ballast water management system into independent column units, each equipped with its own ballast tank and control mechanism. This segmentation allows each column to be adjusted independently and rapidly without requiring water transfer between columns, reducing response time from 15-30 minutes to near-instantaneous adjustment while maintaining platform stability.
Solution Approach 2:
The patent introduces a command center as an intermediary that receives inclination data from sensors and automatically controls ballast water addition/removal in each column. This automated intermediary system eliminates the delay of manual intervention and enables rapid response to inclination changes, improving both response time and reliability.
2Reliability
If ballast water is transferred between columns, then inclination can be corrected, but the system requires long pipelines and substantial infrastructure increasing complexity and cost
Solution Approach 1:
The patent extracts the ballast water transfer function from the conventional inter-column pipeline system and replaces it with independent ballast tanks in each column. This eliminates the need for long-distance pipelines connecting columns, reducing infrastructure complexity and cost while preserving the inclination correction capability through localized water addition or removal.
Solution Approach 2:
Each column is equipped with its own ballast water management system, allowing it to self-regulate its inclination without relying on external pipeline infrastructure. This self-service approach eliminates complex inter-column piping while maintaining the ability to correct platform inclination through independent column adjustment.
3Productivity
If high-capacity wind turbines are deployed to reduce LCOE, then power generation increases, but overturning moments increase sharply causing larger platform inclinations
Solution Approach 1:
The patent implements a dynamic ballast water management system that continuously monitors platform inclination and automatically adjusts ballast water levels in real-time. This dynamic adjustment capability enables the platform to maintain stability despite the increased overturning moments from high-capacity wind turbines, allowing higher power generation without compromising inclination control.
Solution Approach 2:
The patent employs a feedback control system where sensors continuously measure platform inclination and transmit data to the command center, which then adjusts ballast water levels accordingly. This closed-loop feedback mechanism enables precise control of platform inclination even under the heavy loads of high-capacity wind turbines, maintaining reliability while supporting increased power generation.
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
Enhances platform stability and power production efficiency by reducing response times, lowering maintenance costs, and improving reliability through localized and rapid ballast adjustments, maintaining optimal tilt within predefined limits.
Implementation Method 1
A floating wind turbine platform features a buoyant foundation supporting a tower
Implementation Method 2
the buoyant foundations are generally classified into four types: Spar platforms, Semi-submersible (SEMI) platforms, Barge platforms, and Tension Leg Platforms (TLPs)
Data Source
AI summary
The method for counterbalancing the mean inclination of a Floating Offshore Wind Turbine (FOWT) platform is designed to be simple, efficient, and highly responsive. It employs short-distance piping to enable swift and effective pump-in and pump-out operations within the same column, allowing for precise and independent control of ballast operation. This strategy is not only cost-efficient but also supports remote operation, facilitating rapid adjustments for both normal and abnormal conditions. Furthermore, the method incorporates redundancy in the counterbalancing systems, significantly boosting the overall reliability and ensuring consistent and effective ballast management for the platform.