Dynamic response and power performance of a novel wind-wave-tidal energy system with single-point mooring integration

Hongjian Zhang, Xiaodong Liu, Xinyu Cao, Ningchuan Zhang and Adrian Wing-Keung Law

Energy, 2025, vol. 325, issue C

Abstract: The growing global demand for renewable energy has driven the development of offshore hybrid energy systems. This study investigates the development of a novel floating wind-wave-tidal (WWT) hybrid energy system with various mooring configurations. Using a new aero-hydro-servo-elastic fully coupled numerical model, the platform motion responses, mooring line tensions, and power outputs under different environmental loads are systematically analyzed, as well as the yaw restoration capabilities under misaligned loading combinations. Notably, the single-point mooring (SPM) configuration is applied to the WWT system, and the performance is compared with the existing spread mooring method. Key findings reveal that a floating offshore wind turbine (FOWT) alone with the SPM configuration exhibits superior pitch stability compared with the spread mooring method, particularly at long wave periods with response amplitude reduced by 62.4 %–89.9 %. Integrating the wave and tidal energy devices fully in a semi-submersible FOWT system further significantly improves the platform stability and reduces structural loads compared with single FOWT, with a reduction of 67.6 %–69.8 % in maximum pitch and 17.9 %–30.7 % in tower base bending moment under rated conditions. The full WWT system also significantly improves the power output, with 78.2 %–78.8 % increase in total power generation under high loading conditions. Additionally, with SPM configuration, the full WWT system exhibits better yaw restoration than that of the FOWT under misaligned wind, wave, and current, achieving more stable restore equilibrium at the same time. Overall, the research findings provide critical insights into the design and optimization of deep-sea hybrid energy systems, and illustrate the significant advantages of SPM configuration in enhancing system stability and overall performance.

Keywords: Floating offshore wind turbine; Wave energy converter; Tidal turbine; Hybrid energy system; Single point mooring (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544225017566
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:325:y:2025:i:c:s0360544225017566

DOI: 10.1016/j.energy.2025.136114

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().