Product Development
Making Innovation Work
7C believes that the ocean can provide us with all the green and sustainable resources we need.
7C is committed to convert knowledge into innovative offshore solutions to meet ocean development.
PyraWind: Floating Offshore Wind Solution
Proven semi-submersible technology
Low steel weight per MW installed
Scalable Brace-less Modular Structure
Support Mass Production
Excellent Stability Performance
Easy Transport and Installation
PyraWind Concept
The patented floating wind foundation concept PyraWind provides a scalable, integrated wind turbine solution that minimizes the LCOE of offshore wind applications.
The pyramid-shaped hull provides a stable, solid foundation for the large wind turbine under development. The platform includes 3 columns canted inward from the corner of the hull toward the central vertical axis. Horizontally disposed pontoons interconnect adjacent columns at the lower ends. The columns and pontoons form a closed, brace-less structure hull to support the turbine tower directly above the top of the column convergence point.
The convergence of canted columns providing strong support to the center tower has an advantage in keeping the tower's natural frequency within the desired range. This unique feature reduces the effective length of the tower and gives a higher stiffness to the tower. Therefore, it allows the use of a lightweight tower. The structure load transfer from the turbine tower to 3 columns is natural and effectively utilizes the whole structure capacity.
The overall structure weight is reduced due to more efficient structure configuration, and the platform is hydrostatically stable with wind turbines installed at the quayside. This design avoids the need for offshore integration of wind turbines and hulls at offshore sites.
Quayside Integration
Wet Tow to Installation Site
Wet Tow to Installation Site
- Shallow Water Port Accessible
- Assemble the wind turbines in one piece and perform grid connection test onshore
- Load the wind turbine onto the substructure hull via a heavy-duty conveyor or crane
Wet Tow to Installation Site
Wet Tow to Installation Site
Wet Tow to Installation Site
Decent stability during transportation
Install Mooring System
State-of-the-Art Analysis
State-of-the-Art Analysis
Hookup pre-laid mooring lines on site
State-of-the-Art Analysis
State-of-the-Art Analysis
State-of-the-Art Analysis
Structural, Global Performance, and Mooring Analysis