A Comparison of Platform Options for Deepwater Floating Offshore Vertical Axis Wind Turbines: An Initial Study
Publication Name: Sandia Report
Publication URL: https://www.osti.gov/servlets/purl/1150233/
This analysis utilizes a 5 – MW VAWT topside design envelope created by Sandia National Laborator ies to compare floating platform options fo r each turbine in the design space. The platform designs are based on two existing designs, the OC3 Hywind spar – buoy and Principal Power’s WindFloat semi – submersible. These designs are scaled using Froude – scaling relationships to determine an appropriately sized spar – buoy and semi – submersible design for each topside. Both the physical size of the required platform as well as mooring configurations are considered. Results are compared with a comparable 5 – MW HAWT in order to identify potential differences in the platform and mooring sizing between the VAWT and HAWT . The study shows that there is potential for cost savings due to reduced platform size requirements for the VAWT.