scholarly journals Investigation of Floating Transportation Equipment for the Offshore Wind Power

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
Fei Duan ◽  
Yuliang Liu
Keyword(s):  
Vibration Reduction ◽  
Offshore Wind ◽  
Hydrodynamic Characteristics ◽  
Basic Design ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Transportation Equipment ◽  
Wave Resonance ◽  
Transportation Process ◽  
Pressure Suction

This paper presents a floating transportation equipment (FTE) for the negative pressure suction bucket foundation (NPSBF) of offshore wind turbines, and the basic design and main transportation means are introduced. The hydrodynamic characteristics of integrated FTE-NPSBF structure are comprehensively studied. The ability of FTE as a transportation aid to provide stability for the NPSBF is verified, and the vibration reduction measures under the condition of wave resonance during the floating transportation process are given.

scholarly journals Foundations in Offshore Wind Farms: Evolution, Characteristics and Range of Use. Analysis of Main Dimensional Parameters in Monopile Foundations

2019 ◽  
Vol 7 (12) ◽  
pp. 441 ◽  
Author(s):  
Sergio Sánchez ◽  
José-Santos López-Gutiérrez ◽  
Vicente Negro ◽  
M. Dolores Esteban
Keyword(s):  
Renewable Energy Sources ◽  
Wind Farms ◽  
Offshore Wind ◽  
General View ◽  
Offshore Wind Farms ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Current State ◽  
The Future ◽  
Dimensional Parameters

Renewable energies are the future, and offshore wind is undoubtedly one of the renewable energy sources for the future. Foundations of offshore wind turbines are essential for its right development. There are several types: monopiles, gravity-based structures, jackets, tripods, floating support, etc., being the first ones that are most used up to now. This manuscript begins with a review of the offshore wind power installed around the world and the exposition of the different types of foundations in the industry. For that, a database has been created, and all the data are being processed to be exposed in clear graphic summarizing the current use of the different foundation types, considering mainly distance to the coast and water depth. Later, the paper includes an analysis of the evolution and parameters of the design of monopiles, including wind turbine and monopile characteristics. Some monomials are considered in this specific analysis and also the soil type. So, a general view of the current state of monopile foundations is achieved, based on a database with the offshore wind farms in operation.

Offshore Wind Turbines Operation and Maintenance in China: A Case Study of Donghai Bridge Offshore Wind Farm

2013 ◽  
Vol 448-453 ◽  
pp. 1871-1874
Author(s):  
Yuan Xie
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Wind Farm ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Operation And Maintenance ◽  
Steady Stage ◽  
Power Project

China has great potential in offshore wind energy and makes an ambitious target for offshore wind power development. Operation and Maintenance (O&M) of offshore wind turbines become more and more important for China wind industry. This study introduces the current offshore wind power projects in China. Donghai Bridge Offshore Demonstration Wind Farm (Donghai Bridge Project) is the first commercial offshore wind power project in China, which was connected to grid in June 2010. O&M of Donghai Bridge Project represent the state-of-the-art of China offshore O&M. During the past two and half years, O&M of Donghai Bridge Project has gone through three phases and stepped into a steady stage. Its believed that analysis of O&M of Donghai Bridge Project is very helpful for Chinas offshore wind power in the future.

scholarly journals Floating offshore wind turbines - technology and potential

2020 ◽  
Vol 43 ◽  
pp. 89-94
Author(s):  
Aurel Dan Maimon
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Production Efficiency ◽  
Short Review ◽  
Offshore Wind ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines ◽  
Visual Impact ◽  
The One

"The main purpose of this paper is to present a short review of the actual progress on the floating offshore wind turbines. Floating offshore wind turbines have several advantages: overcoming the depth constraint, floating offshore wind turbines can be installed further offshore and therefore on the one hand have little or no visual impact from the coast, and on the other hand to take advantage of more constant and stronger winds, thus increasing the production efficiency of electricity. They are assembled to port and then transported to site with an ordinary tug, which can also bring them ashore for heavy maintenance or final dismantling. Floating wind power is the future of offshore wind power."

Numerical Study on Aero-Hydrodynamics With Inter-Turbine Spacing Variation for Two Floating Offshore Wind Turbines

2019 ◽  
Author(s):  
Yang Huang ◽  
Decheng Wan
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Numerical Study ◽  
Offshore Wind ◽  
Hydrodynamic Characteristics ◽  
Offshore Wind Turbine ◽  
Analysis Tool ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines ◽  
Spacing Variation

Abstract To investigate the influence of the inter-turbine spacing on the performance of the floating offshore wind turbine (FOWT) in the floating wind farm, coupled aero-hydrodynamic simulations of two spar-type FOWT models with inter-turbine spacing variation under shear wind and regular wave conditions are performed in the present work. An unsteady actuator line model (UALM) is embedded into in-house code naoe-FOAM-SJTU to establish a fully coupled CFD analysis tool for numerical simulations of FOWTs. From the simulation results, the unsteady aerodynamic power and thrust are obtained, and the hydrodynamic responses including the six-degree-of-freedom motions and mooring tensions are available. Detailed flow visualizations of wake velocity profiles and vortex structures are also illustrated. The coupled performance of floating offshore wind turbines with inter-turbine spacing variation are analyzed, and the influences of inter-turbine spacing on aero-hydrodynamic characteristics of coupled wind-wave flow field are discussed. It is found that the power output of downstream wind turbine increases with inter-turbine spacing. Coupled aero-hydrodynamic characteristics of flow filed are significantly affected by inter-turbine spacing.

scholarly journals Analysis of the Economic and Environmental Effects by the Offshore Wind Power Construction: In case of Kitakyushu City, Japan

2015 ◽  
Vol 1 (2) ◽  
pp. 159
Author(s):  
Woojong Jung
Keyword(s):  
Renewable Energy ◽  
Environmental Impact ◽  
Wind Power ◽  
Wind Turbines ◽  
Local Economy ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Offshore Wind Power ◽  
Offshore Wind Turbines ◽  
Production Value

The purpose of this study is to analyze the economic spillover effects and environmental impact of building offshore wind turbines on a local economy in Japan. Japan is facing a great turning point in its energy policy in the wake of the Great East Japan Earthquake, further increasing the importance of renewable energy. The offshore wind turbines experiment in Kitakyushu City is anticipated to showcase the potential of offshore wind power in Japan for the future and dynamize the local economy. As such, in this study, an economic and environmental impact assessment by Input–Output (I-O) analysis was conducted for the construction of the offshore wind turbines. The results show that building one hundred 3MW offshore wind turbine units will increase the induced production value by approximately 205.2 billion yen, equivalent to roughly 2.7% of Kitakyushu City’s total production value. Additionally, it is anticipated to create approximately 14 500 jobs. In terms of environmental impact, the increase in production is estimated to increase CO2 emissions by nearly 340 000 tonnes (an increase of approximately 2.1%). Accordingly, the environmental impact of building offshore wind turbines in Kitakyushu City is smaller than the economic impact, meaning that a sustainable between the economy and the environment can be found by the diffusion of renewable energy.

Pitch Angle Control of Floating Offshore Wind Turbines by H∞ Control

2014 ◽  
Vol 134 (8) ◽  
pp. 1096-1103 ◽  
Author(s):  
Sho Tsujimoto ◽  
Ségolène Dessort ◽  
Naoyuki Hara ◽  
Keiji Konishi
Keyword(s):  
Wind Turbines ◽  
Pitch Angle ◽  
Offshore Wind ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines
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