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Design Technology Development for Innovative LCOE Saving Substructures of 20MW+ Ultra Large Floating Offshore Wind Turbine System, Korea
Project Overview
- Employer Ministry of Trade, Industry and Energy
- Client Korea Institute of Energy Technology Evaluation and Planning
- Period 2023.04 ~ 2026.03
- Project Outline
- The national R&D project aims to develop innovative floating substructure design technologies for the floating offshore wind market, which is expected to expand in the coming years. As the lead organization of the R&D project, BANDI is responsible for the development of ultra-large hybrid float design technology, one of the five innovative R&D technologies.
- Features of R&D Technology
- Development of Ultra-Large Hybrid Floater Adopting CFDS(Concrete Filled Double Skin)
Improving Crashworthiness of Floating Substructures through Adopting High Ductility Steel- Improving Economic Efficiency through the Design Technology Development of Clumped Wire Hybrid Mooring System
- Improving Economic Efficiency through the Design Technology Development of Innovative Fast Mooring Installation
- Improving Economic Efficiency through the Design Technology Development of Shared Anchors Capable of Complexization
Existing floaters have been developed using only steel or concrete, and there is a need to address the fundamental problems of these materials. To solve these problems, BANDI would develop a hybrid float that combines concrete and steel.
Concrete-filled double-sheathing (CFDS) is a structure that efficiently takes the material advantages of steel (tension) and concrete (compression) and overcomes the disadvantages of each with an optimized combination. By applying the CFDS structure, it is possible to improve the watertightness by the external skin plate, and the resistance to tension and external impact, and manufacturing quality such as shortening the construction period and cost reduction.
By applying high ductility steel to the hybrid floater, it is developed to maintain the Risk Level 1 by improving crashworthiness. In addition, it enables a more structurally safe design by lowering the probability of floater damage due to ship collisions.
Mid- and low-depth mooring systems are not commonly built, so BANDI wants to develop an economical mooring system by applying low-cost steel wire rope, which can be supplied by domestic manufacturers, to the mooring line.
As conventional mooring line installation is time-consuming, BANDI develops an innovative mooring line installation design technology that permanently installs annular wires, enabling fast installation and dramatically reducing mooring line installation time to ensure economic viability.
Mooring costs account for 75% of the total installed cost of a floating offshore wind mooring system, making it a significant cost driver. By developing a shared anchor concept that is shared by multiple moorings, the cost of moorings can be dramatically reduced.
By establishing a foundation for commercialization through AIP certification, innovative R&D technologies will improve the technical capabilities of domestic engineers and achieve self-reliance of high-value-added technologies, enabling the domestic floating offshore wind sector to become a new growth engine through global competitiveness and expanded overseas expansion.
