Abstract
Abstract This paper presents a conceptual design comparison between a 3-Column Tension Leg Platform (TLP) and a Semisubmersible (Semi) floating offshore wind turbine (FOWT) platform for the US west coast at a water depth of 1,100 m. The International Energy Agency (IEA) 15 MW horizontal-axis wind turbine (HAWT) is utilized to compare the floating platform design options. TLP demonstrates exceptional dynamic behavior with very low displacements and almost no vertical/rotational motions. Its lightweight structure weight and simple geometry lend themselves to simplifying fabrication/integration processes and competitive LCOE levels. This paper contains a quantitative comparison of TLP and Semisubmersible FOWT platforms in the following aspects: • Applicable Design Codes • Design environment load cases • Platform configurations • Hull weight and CG • Global performance • Tendon and mooring loads • TLP with a slanted tendon as a sensitivity case Additionally, it provides a qualitative comparison between the TLP and Semisubmersible FOWT platform from various perspectives, including platform configuration design, structure weight, center of gravity, fabrication, transportation, and installation (T&I) of floating substructure, station keeping, and the wind turbine installation.
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