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Montserrat Sacie, Matilde Santos, Rafael López and Ravi Pandit
One of the most promising solutions that stands out to mitigate climate change is floating offshore wind turbines (FOWTs). Although they are very efficient in producing clean energy, the harsh environmental conditions they are subjected to, mainly strong...
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Yapo Wang, Lixian Zhang, Constantine Michailides, Ling Wan and Wei Shi
Due to the energy crisis and greenhouse effect, offshore renewable energy is attracting increasing attention worldwide. Various offshore renewable energy systems, such as floating offshore wind turbines (FOWTs), and wave energy converters (WECs), have be...
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Benedikt Ernst and Jörg R. Seume
The main contributing factors to unsteady loading of Offshore Wind Turbines (OWT) are wind shear, turbulence, and waves. In the present paper, the turbulence intensity and the wind shear exponent are investigated. Using data from the FINO 1 research plat...
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Felipe Alberto Villalobos Jara
Pág. Page 33 - 48
This paper describes the beginning and evolution of the now worldwide growing offshore wind energy industry. In particular, the current renewable energy policy in the UK is described. The characteristics of the environmental loads offshore, type of seabe...
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Mohammad Barooni and Deniz Velioglu Sogut
The design and optimization of floating offshore wind turbines (FOWTs) pose significant challenges, stemming from the complex interplay among aerodynamics, hydrodynamics, structural dynamics, and control systems. In this context, this study introduces an...
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Seydali Ferahtia, Azeddine Houari, Mohamed Machmoum, Mourad Ait-Ahmed and Abdelhakim Saim
Due to the present trend in the wind industry to operate in deep seas, floating offshore wind turbines (FOWTs) are an area of study that is expanding. FOWT platforms cause increased structural movement, which can reduce the turbine?s power production and...
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Stian H. Sørum, Nuno Fonseca, Michael Kent and Rui Pedro Faria
Fibre ropes offer beneficial properties for mooring of floating offshore wind turbines (FOWTs). However, the mooring line?s stiffness is both load-history and load-rate dependent. A quasi-static stiffness is observed for slow loading, with a higher stiff...
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Eugen Rusu and Florin Onea
The objective of this present work is to provide a more comprehensive picture of the wind conditions corresponding to some important European marine energy sites by considering both historical (1979?2020) and climatological data (2021?2100). As a first s...
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Mikel Serrano-Antoñanazas, Jesús-Enrique Sierra-Garcia, Matilde Santos and María Tomas-Rodríguez
Compared to onshore turbines, floating offshore wind turbines (FOWTs) take advantage of the increased availability of offshore wind while causing less environmental impact. However, the strong winds, waves, and currents to which they are subjected trigge...
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Xue Long, Lu Liu and Shunying Ji
Self-excited vibrations of offshore structures interacting with sea ice, characterized by low frequency and high amplitudes, pose significant hazards to offshore wind turbines (OWTs) in cold seas. This study employs the discrete element method (DEM) with...
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Souha Ajmi, Martial Boutet, Anne-Claire Bennis, Jean-Claude Dauvin and Jean-Philippe Pezy
Offshore Wind Farm (OWF) foundations are considered to have a potential impact on the larval dispersion of benthic species. This study focused on OWFs? impacts on larval dispersion, considering factors such as the foundation type, flow velocity, flow dir...
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Jian-Hong Wan, Rui Bai, Xue-You Li and Si-Wei Liu
Assessment of the natural frequency of the offshore wind turbine (OWT) system is a critical task in design to avoid resonance. The natural frequency of the monopile supported OWT may change during operation and needs to be calculated regularly. Conventio...
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Yongqing Lai, Wei Li, Ben He, Gen Xiong, Renqiang Xi and Piguang Wang
At present, monopile-supported offshore wind turbines (MOWTs) are widely used in offshore wind farms. The influence of blade flexibility on the dynamic behaviors of MOWTs excited by waves and earthquakes was investigated in this study. Numerical analysis...
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Shuang Liu, Yaozhen Han, Ronglin Ma, Mingdong Hou and Chao Kang
It is of great importance to simultaneously stabilize output power and suppress platform motion and fatigue loads in floating offshore wind turbine control systems. In this paper, a novel composite blade pitch control scheme considering actuator fault is...
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Haiying Sun, Hongxing Yang and Siyu Tao
In order to make full use of the potential of wind resources in a specific offshore area, this paper proposes a new method to simultaneously optimize the number, hub height and layout of a wind farm. The wind farm is subdivided by grids, and the intersec...
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He Li, Weiwen Peng, Cheng-Geng Huang and C. Guedes Soares
A detailed analysis is performed on a dataset of failure and maintenance records from various onshore wind farms located in different geographical areas for the safety, risk, reliability, availability, and maintainability characterization of wind turbine...
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Lei Xue, Jundong Wang, Liye Zhao, Zhiwen Wei, Mingqi Yu and Yu Xue
Wake effects commonly exist in offshore wind farms, which will cause a 10?20% reduction of whole power production as well as a 5?15% increase of fatigue loading on the wind turbine main structures. Obviously wake interaction between floating offshore win...
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Guilan Wang, Yi Gan, Conghuan Le, Ruiyang Yan and Xueyang Hu
Tripod bucket jacket foundation is an alternative foundation solution for deep-sea wind farms. This paper analyzes and compares the bearing characteristics of two tripod bucket jacket foundations with different height-diameter ratios, the tripod suction ...
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Puyang Zhang, Yunlong Xu, Jiandong Xiao, Conghuan Le and Hongyan Ding
The composite bucket foundation (CBF) consists of a concrete curved transition section, a concrete beam-slab system, and a suction caisson and is increasingly used as the foundation for offshore wind turbines. The curved transition section transmits the ...
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Tomas Lopez-Olocco, Leo M. González-Gutiérrez, Javier Calderon-Sanchez, Adolfo Marón Loureiro, Leandro Saavedra Ynocente, Ana Bezunartea Barrio and Nicolás Vivar Valdés
Recently, several experimental and numerical studies have underlined the advantages of adding clumped weights at discrete positions of mooring lines. To confirm the influence of these weights, an experimental study was performed for a 1:30 scale model of...
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