scholarly journals Landmark Report Analyzes Current State of U.S. Offshore Wind Industry (Fact Sheet)

2011 ◽  
Author(s):  
Keyword(s):  
Offshore Wind ◽  
Fact Sheet ◽  
Current State ◽  
Offshore Wind Industry

scholarly journals Gravity-Based Foundations in the Offshore Wind Sector

2019 ◽  
Vol 7 (3) ◽  
pp. 64 ◽  
Author(s):  
M. Esteban ◽  
José-Santos López-Gutiérrez ◽  
Vicente Negro
Keyword(s):  
Water Depth ◽  
High Water ◽  
Offshore Wind ◽  
Is Research ◽  
Current State ◽  
Different Types ◽  
Large Water ◽  
Water Depths ◽  
Offshore Wind Industry

In recent years, the offshore wind industry has seen an important boost that is expected to continue in the coming years. In order for the offshore wind industry to achieve adequate development, it is essential to solve some existing uncertainties, some of which relate to foundations. These foundations are important for this type of project. As foundations represent approximately 35% of the total cost of an offshore wind project, it is essential that they receive special attention. There are different types of foundations that are used in the offshore wind industry. The most common types are steel monopiles, gravity-based structures (GBS), tripods, and jackets. However, there are some other types, such as suction caissons, tripiles, etc. For high water depths, the alternative to the previously mentioned foundations is the use of floating supports. Some offshore wind installations currently in operation have GBS-type foundations (also known as GBF: Gravity-based foundation). Although this typology has not been widely used until now, there is research that has highlighted its advantages over other types of foundation for both small and large water depth sites. There are no doubts over the importance of GBS. In fact, the offshore wind industry is trying to introduce improvements so as to turn GBF into a competitive foundation alternative, suitable for the widest ranges of water depth. The present article deals with GBS foundations. The article begins with the current state of the field, including not only the concepts of GBS constructed so far, but also other concepts that are in a less mature state of development. Furthermore, we also present a classification of this type of structure based on the GBS of offshore wind facilities that are currently in operation, as well as some reflections on future GBS alternatives.

National Offshore Wind Strategy: Facilitating the Development of the Offshore Wind Industry in the United States

2016 ◽  
Author(s):  
Patrick Gilman ◽  
Ben Maurer ◽  
Luke Feinberg ◽  
Alana Duerr ◽  
Lauren Peterson ◽  
...  
Keyword(s):  
United States ◽  
The United States ◽  
Offshore Wind ◽  
Offshore Wind Industry

Floating Wind Turbine Model Test to Verify a MoorDyn Modification for Nonlinear Elastic Materials

2021 ◽  
pp. 1-41
Author(s):  
William M West ◽  
Andrew J. Goupee ◽  
Christopher Allen ◽  
Anthony M. Viselli
Keyword(s):  
Test Data ◽  
Offshore Wind ◽  
Strain Response ◽  
Design Load ◽  
Jacket Structures ◽  
Scale Test ◽  
Numerical Tools ◽  
Nonlinear Elastic ◽  
Strain Responses ◽  
Offshore Wind Industry

Abstract As the Floating Offshore Wind industry matures it has become increasingly important for researchers to determine the next generation materials and processes that will allow platforms to be deployed in intermediate (50-85 m) water depths which challenge the efficiency of traditional catenary chain mooring systems and fixed-bottom jacket structures. One such technology, synthetic ropes, have in recent years come to the forefront of this effort. The challenge of designing synthetic rope moorings is the complex nonlinear tension-strain response inherent of some rope material choices. Currently, many numerical tools for modeling the dynamic behavior of FOWTs are limited to mooring materials that have a linear tension- strain response. In this paper an open source FOWT design and analysis program, OpenFAST, was modified to capture the more complex tension-strain responses of synthetic ropes. Simulations from the modified OpenFAST tool were then compared with 1:52-scale test data for a 6MW FOWT Semi- submersible platform in 55m of water subjected to representative design load cases. A strong correlation between the simulations and test data was observed.

scholarly journals Musculoskeletal pain among offshore wind industry workers: a cross-sectional study

2020 ◽  
Vol 93 (7) ◽  
pp. 899-909
Author(s):  
Marcial Velasco Garrido ◽  
Janika Mette ◽  
Stefanie Mache ◽  
Volker Harth ◽  
Alexandra M. Preisser
Keyword(s):  
Musculoskeletal Pain ◽  
Cross Sectional Study ◽  
Offshore Wind ◽  
Sectional Study ◽  
Cross Sectional ◽  
Offshore Wind Industry

scholarly journals Offshore Wind Farms On-Site Submarine Cable Testing and Diagnosis with Damped AC

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3703 ◽  
Author(s):  
Gulski ◽  
Jongen ◽  
Rakowska ◽  
Siodla
Keyword(s):  
Wind Farms ◽  
International Standards ◽  
Power Grids ◽  
Offshore Wind ◽  
Power Cables ◽  
Testing Technique ◽  
Offshore Wind Farms ◽  
Current State ◽  
Repair Costs ◽  
Testing Solution

: The current power cables IEC standards do not provide adequate recommendations for after-laying testing and diagnosis of offshore export and inter-array power cables. However the standards IEEE 400 and IEEE 400.4 recommend partial discharge monitored testing, e.g., by continuous or damped AC voltages (DAC). Based on the international experiences, as collected in more than 20 years at different power grids, this contribution focuses on the use of DAC for after-laying testing and diagnosis of submarine power cables both the export and inter-array cables. Higher risk of failure, long unavailability, higher repair costs, and maintenance costs imply that advanced quality control is becoming more important. The current state of the existing and drafting international standards are based on onshore experiences and not related to the actual serious problems experienced with failures on export up to 230 kV and inter-array cables up to 66 kV. The application of damped AC as a testing solution in this concern is specially discussed. The advantages of this testing technique, in combination with actual testing examples, show the findings on export and inter-array cables at offshore wind farms.

scholarly journals A Job Task Analysis for Technicians in the Offshore Wind Industry

Work ◽  
2019 ◽  
Vol 63 (4) ◽  
pp. 537-545 ◽  
Author(s):  
Gemma S. Milligan ◽  
Joseph P. O’Halloran ◽  
Michael J. Tipton
Keyword(s):  
Task Analysis ◽  
Offshore Wind ◽  
Offshore Wind Industry ◽  
Job Task

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 Foundation Design: Some Key Issues

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
M. Dolores Esteban ◽  
José-Santos López-Gutiérrez ◽  
Vicente Negro ◽  
Clara Matutano ◽  
Francisca M. García-Flores ◽  
...  
Keyword(s):  
Wave Theory ◽  
Offshore Wind ◽  
Wave Load ◽  
Foundation Design ◽  
Key Issues ◽  
Transition Piece ◽  
Structural Uncertainties ◽  
Near Future ◽  
Field Wave ◽  
Offshore Wind Industry

Despite the growth of the offshore wind industry, there are currently doubts relating to the design of wind facilities in the sea. This paper expounds current, already identified structural uncertainties: problems for soil characterization and transition piece (TP) design. This document also introduces new doubts or issues to be researched in the near future in this field (wave theory, scour process, wave load actions, scale difficulty, etc.), not as yet identified due to the scarce experience in the offshore wind industry. With this in mind, technical offshore wind standards related to foundation design have been reviewed.

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