Reinforced Concrete Floating Platform for Offshore Wind
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Solution Overview
Problem
Existing floating platforms for offshore wind turbines face challenges such as high costs, corrosion issues, and increased CO2 emissions due to the use of steel, as well as technical difficulties in installation and reduced performance due to dynamic loads from wind, waves, and currents.
Innovation Solution
A floating platform made of reinforced concrete with a quasi-cylindrical shape arranged in a staggered manner, featuring openings connected to the sea for load symmetry and natural prestress, which reduces fractures and improves structural strength. The platform also includes a planar latticework for anchoring mooring lines, distributing loads evenly and reducing stress concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel is used for building floating platforms, then structural strength and corrosion resistance are improved, but CO2 emissions and material cost increase
Solution Approach 1:
The patent changes the material parameter from steel to reinforced concrete, fundamentally altering the composition to reduce CO2 emissions during construction while maintaining structural integrity through concrete's compressive strength properties
Solution Approach 2:
The patent uses composite reinforced concrete structure combining concrete with steel reinforcement bars and prestressing elements, creating a hybrid material system that leverages the compressive strength of concrete and tensile strength of steel to achieve both environmental and structural goals
2Productivity
If floating platforms are used in deep water areas, then wind power production is improved, but platform stability and installation complexity worsen
Solution Approach 1:
The patent employs ballast tanks that can be filled with water to adjust the platform's center of gravity and counterbalance the wind turbine's weight, improving stability in deep water conditions while maintaining the ability to generate wind power
Solution Approach 2:
The patent incorporates adjustable ballast systems and flexible mooring arrangements that allow the platform to dynamically adapt to changing sea conditions and wind loads, maintaining stability while operating in deep water environments for enhanced wind power production
3Object-generated harmful factors
If reinforced concrete is used instead of steel, then CO2 emissions and material cost are reduced, but structural behavior under bending and tension worsens
Solution Approach 1:
The patent uses composite reinforced concrete structure combining concrete with steel reinforcement bars and prestressing elements, creating a hybrid material system that leverages the compressive strength of concrete and tensile strength of steel to achieve both environmental and structural goals
Solution Approach 2:
The patent applies prestressing forces to the concrete structure, changing the stress distribution parameters to prevent tensile cracking and improve the concrete's performance under bending and tension loads while maintaining low CO2 emissions
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 reinforced concrete platform achieves better structural behavior, higher resistance to fractures, reduced framework requirements, and increased operational safety, while allowing for versatile operation at different drafts and adapting to various environmental conditions, thus reducing installation risks and costs.
Implementation Method 1
having openings in the middle of the structure which are directly connected to the sea. This allows the reinforced concrete assembly thereof to work under compression against a group of loads to which it is subjected
Data Source
AI summary
The present invention relates to a solution for a floating wind platform made of reinforced concrete for mass production, characterized by a geometric design providing a hydrostatic natural prestressing to the concrete, causing it to work under compression. The structural response of the platform for working in the most effective mode is improved, and the occurrence of fractures or cracks in the concrete is prevented, which reduces permeability and allows for reducing the rebar to be contained in the structure, also increasing operational safety. Furthermore, the invention has a system for anchoring the mooring lines to the structure in the form of a truss made of reinforced concrete which evenly distributes mooring stresses, minimizing prestressing in the high area of the platform, and increasing the area for distributing shear forces due to the change in section between the platform and the tower of the wind turbine. The geometric design furthermore confers the versatility of being able to adopt low draft SPAR, semi-submersible, barge, or buoy solutions, with the wind turbine being installed such that it is centered or off-center on the structure, thereby being adapted to different draft requirements or environmental and logistics conditions.