MOTION COMPARISON OF 15 MW FLOATING OFFSHORE WIND TURBINE AMONG SEMI-SUBMERSIBLES, BARGE AND TENSION LEG PLATFORM
Other Title
15 兆瓦浮式風機在半潛式、駁船及張力腿三種平台上的運動性能比較
Journal
Journal of Taiwan Society of Naval Architects and Marine Engineers
Journal Volume
43
Journal Issue
4
Start Page
87
End Page
95
ISSN
10234535
Date Issued
2024-11
Author(s)
Abstract
Development of Floating Offshore Wind (FOW) farms requires identifying the most appropriate floater type for demo tests and commercial applications. Different types of floating concepts can be selected including semi-submersibles, barges, and Tension Leg Platforms (TLPs). Each type has its unique strengths and drawbacks. As-sessing their motion performance is essential for determining their feasibility. This research examines the motions of four floater designs: center-tower semi-submersible (inspired by VolturnUS), Side-tower semi-submersible (TaidaFloat), square barge with a moonpool (inspired by Ideol), and TLP (inspired by Float4Wind). The dimen-sions of each floater were calibrated to ensure some comparable characteristics. All models, designed to support a 15 MW wind turbine, underwent dynamic simulations using OrcaFlex under Design Load Cases 6.1, utilizing envi-ronmental data from offshore Hsinchu in the Taiwan Strait. Hydrostatic properties, hydrodynamic properties, and dynamic motion responses were assessed. The analysis shows that while the TLP has smallest motions in heave and pitch, it allows excessive surge movements, potentially limiting its viability. The barge exhibits poor heave per-formance due to its large waterplane area that increases heave stiffness. Its heave natural period is adversely within the first-order wave excitation zone so that it has largest motions. Semi-submersibles offer a more balanced motion response overall. Between the two semis, TaidaFloat stands out for its excellent heave performance, while Voltur-nUS offers superior yaw stability under varying environmental conditions. Based on these results, semi-submersibles may be considered as the more suitable option for deployment in waters such as the Taiwan Strait.
Subjects
barge
FOWT
hydrodynamic response
semi-submersibles
tension leg platform
Vessel motion
Publisher
Taiwan Society of Naval Architects and Marine Engineers
Type
journal article