Floating Offshore Wind Turbines: DNV KEMA Set Standards

SeaDiscovery.com
Tuesday, June 25, 2013
Johan Sandberg: Photo credit DNV KEMA

As demand for wind energy increases, offshore deployments are continuing to move into deeper waters.

DNV KEMA has released its new standard for floating offshore wind turbine structures that will help ensure safety and reliability in floating wind turbines, and give the nascent floating-turbine sector the confidence to continue its development to commercial maturity.

“A prerequisite for the industry to continue to grow and develop effectively is development of design standards…they are essential to ensure a consistent and appropriate level of safety in design, construction and operation of floating wind turbines. This will increase confidence in the technology and hopefully make more projects bankable.” – Johan Sandberg, head of renewable energy at DNV KEMA, Norway and project sponsor.

In response to the fast-expanding offshore wind market, DNV KEMA, the energy arm of DNV, has developed a new standard that will help accelerate the development of a new generation of floating offshore wind turbines by establishing design requirements for the floating structure and related systems. According to Johan Sandberg, head of renewable energy at DNV KEMA, Norway and project sponsor, the standard covers a broad range of issues, including safety philosophy and design principles; site conditions, loads and response; materials and corrosion protection; structural design; design of anchor foundations; floating stability; station keeping; control and mechanical systems; transport and installation; in-service inspection and cable design.

“As demand for wind energy increases, we predict offshore deployments will continue to move into deeper waters and, consequently, there’s a need to establish design standards that will help ensure safety, reliability, and confidence in future wind turbines,” he says. “To that end, the new standard, developed as a Joint Industry Project (JIP) with 10 participating companies, aims to spur progress in floating offshore wind through a framework for best practices and technical requirements, plus producing guidance for design, construction and in-service inspection.”

Sandberg notes that many densely populated coastal areas around the world are not suitable for traditional bottom-fixed offshore wind turbines. In other areas, the shallow water coast is already developed or challenging seabed conditions makes bottom-fixed offshore wind unsuitable. Also, local communities have been known to oppose projects due to negative visual impacts.

“Recent successful deployments of full-scale prototype configurations have demonstrated that floating wind turbines can be a viable alternative and the market is taking notice. Several companies and research institutes worldwide are already engaged in developing research programs, pilot projects and even planning for commercial development of floating wind farms,” he says.

For various reasons, countries like Japan and the U.S. have also made offshore wind energy one focus of their energy policy. According to Sandberg a tricky point in the development of offshore wind around the coastal belts of these countries, like the majority of coastal belts around the world, is that water depths can range from dozens to hundreds of metres. This situation demands new technology so in both Japan and the U.S., ideas are turning to floating structures for wind turbines.

“It is now time to take the next step: standardization. A new standard can increase the confidence in the industry and hopefully attract new investors to this new renewable energy technology,” says Sandberg. “The decades of expertise that DNV has amassed in the standardization of maritime offshore oil & gas, and onshore and offshore wind is invaluable for the development of standards for floating offshore wind structures.”

The new standard for floating wind structures, devised under DNV KEMA’s leadership through project manager Anne Lene Hopstad and technical specialist Knut Ronold supplements the developed DNV Guideline for Offshore Floating Wind Turbine Structures, and the existing standard DNV-OS-J101 Design of Offshore Wind Turbine Structures.

The 10 participants in the JIP study are Statoil, Nippon Steel & Sumitomo Metal Corporation, Sasebo Heavy Industries, STX Offshore & Shipbuilding, Navantia, Gamesa, Iberdrola, Alstom Wind, Glosten Associates and Principle Power.



 

Maritime Reporter September 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Statoil: New Oil in the Grane Area

Statoil has together with PL169 partners proved new oil resources in the D-structure in the vicinity of the Grane field in the North Sea.   Well 25/8-18 S, drilled by the rig Transocean Leader,

New Standard for LNG Cargo Containment Systems

Wilhelmsen Technical Solutions (WTS) said it has successfully completing the gas trial for the first LNG carrier built to a Boil Off Rate (BOR) of 0.08% per day.

Corvus Gains Support from WINN Initiative

Corvus Energy announced today the award of $1.3 million in repayable assistance from the Western Innovation (WINN) Initiative for its project to further develop the Corvus Energy Storage System.

Maritime Safety

USCG Reopens Port Allen Post Hurricane Ana

The Coast Guard Captain of the Port reopened Port Allen in Kauai Monday morning after surveying crews deemed it  safe for transit. The maritime public is advised

Mitsubishi Super Skiving System

Mitsubishi Heavy Industries, Ltd. (MHI) has completed development of the "Mitsubishi Super Skiving System" for machining internal gears with high speed and outstanding precision.

Key to Somalia's Recovery

Piracy, terrorism and criminal activities originating in Somalia can only be addressed by creating a climate of security, engagement and empowerment that will encourage home grown businesses,

Classification Societies

ClassNK's Guidelines for Exhaust Gas Cleaning Systems

Leading classification society ClassNK announced that it has released Guidelines for Exhaust Gas Cleaning Systems. These guidelines cover class safety requirements

Denmark Lobbies for IMO Top Job

Denmark and its maritime industry are lobbying to get the top position at the International Maritime Organization, a United Nations body that wields great influence

DNV GL Forms Americas LNG Solutions Group

To meet the rapidly growing demand for a wide variety of LNG related services, DNV GL has established a group of LNG experts in North America. In addition to deep LNG expertise,

Wind Power

Autonomous Technology for Offshore Wind Farm

ASV Ltd in association with Planet Ocean Ltd, have received funding from the GROW:OffshoreWind initiative to investigate how the use of Autonomous Surface Vehicles

A2SEA Signs for Dudgeon

Dudgeon Offshore Wind Limited has awarded the Charter for WTG transport and installation to A2SEA A/S. A2SEA shall provide the jack-up vessel Sea Installer

Drydocks World's to build BorWin3

Drydocks World signed an agreement today with Petrofac to build the BorWin3 high voltage direct current (HVDC) converter platform in the North Sea, named BorWin gamma.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Pipelines Pod Propulsion Salvage Ship Repair Shipbuilding / Vessel Construction
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: 0.1436 sec (7 req/sec)