ABS Releases Floating Offshore Wind Turbines Guide

MarineLink.com
Monday, April 08, 2013
Photo: ABS

ABS released the ABS Guide for Building and Classing Floating Offshore Wind Turbine Installations to provide the most comprehensive requirements to date.

Based on the results of case studies and existing technologies, the new guide provides criteria for the design, construction, installation and survey of permanently sited floating offshore wind turbines and includes specific guidelines for areas subject to cyclonic storms. The guide addresses the floating support structure, the stationkeeping system and onboard machinery, equipment and systems that are not part of the turbine rotor-nacelle assembly.

"What makes floating offshore wind turbines unique is the strong interaction among the wind turbine rotor, turbine control systems, floating hull structure and stationkeeping system," ABS Managing Principal Engineer, Offshore Technology Qing Yu explained. "We took this interaction into account, developing the criteria based on understanding the characteristic global responses of representative floating offshore wind turbine designs that included a tension leg platform, semisubmersible and spar."

The design environmental conditions and design load cases specified in the Guide were determined on the basis of International Electrotechnical Commission (IEC) 61400-3 standards in conjunction with a number of revisions and refinements to address the uniqueness of floating offshore wind turbines. The site-specific design is directly reflected in the definition of the design load cases, and the effects of tropical hurricane conditions were one of the main considerations in the calibration studies.

In addition to the design load cases, a set of survival load cases are defined for a further check of the robustness of the stationkeeping system. "It is important to bear in mind that drift-away of a single floating offshore wind turbine due to the failure of its stationkeeping system could cause severe damage to an offshore wind farm where dozens or even hundreds of floating turbines and subsea power cables can be installed in close proximity," Yu said.

The main content of the Guide includes:
•    Design environmental conditions and design load analysis
•    Criteria for designing floating support structures and stationkeeping systems
•    Requirements and recommended practices for global performance analysis
•    Design requirements for mooring systems and foundations
•    Design requirements for steel structures
•    Design requirements for concrete structures
•    Stability criteria
•    Requirements for machinery and systems
•    Survey and inspection requirements for construction, installation and in-service.

ABS offers the +A1 Offshore Wind Turbine Installation (Floating) class notation for floating offshore wind turbine support structures, stationkeeping systems, and onboard machinery and systems that comply with the requirements and conditions in the Guide.

"Extensive case studies using the latest simulation techniques, coupled with ABS' experience in certifying the design, construction and installation of the world's first full-scale semisubmersible floating wind turbine were the basis for the design criteria specified in the Guide," said ABS Vice President of Offshore Technology Bret Montaruli. "ABS has a wealth of information and resources available globally that will be integral as the industry realizes the value of this renewable energy source."

www.eagle.org

 

Maritime Reporter November 2013 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Classification Societies

Equinox Class Scrubber Systems Receive Certification

Algoma Central Corporation (“Algoma”), the largest Canadian shipowner and operator of domestic Great Lakes vessels announces that it has received all requisite

DNV GL Approvals for SAACKE Scrubbers

Classification increases planning certainty for exhaust gas scrubber operators.   The classification society DNV GL has certified the SAACKE exhaust gas scrubber

Class NK Eyes Singapore Renewable Energy Facility

ClassNK has launched a feasibility study for a new marine renewable energy testing facility to be built in Singapore.   The announcement was made at the 2014

Offshore Energy

U.S. Drillers Cut Rigs to Lowest since August

Energy companies have reduced the number of rigs drilling for oil in the United States to the lowest since August, shifting more rigs in favor of natural gas as crude prices dive,

Total CEO: EU Must Fight US Crude Export Law

First major public appearance of new Total head; he challenges European politicians to fight US ban. The new head of French energy major Total challenged Europe to fight Washington over the U.

Ensco plc Reports 3Q, 2014 Results

Ensco plc  today reported earnings per share from continuing operations of $1.93 in third quarter 2014, up 16% from $1.66 in third quarter 2013. Adjusted for a $0.

 
 
Maritime Standards Navigation Offshore Oil Pod Propulsion Port Authority Salvage Ship Electronics Shipbuilding / Vessel Construction Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1231 sec (8 req/sec)