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Dutch offshore foundations manufacturer Sif and Japan-based East Winds Asia (EWA) have developed a method to transport and store offshore wind foundations in Asian harbors which is said to eliminate the need for additional infrastructural investments.

The method includes the foundations being transported on a semi-submersible ship, and once it arrives in a harbor, the cargo is unloaded and foundations are brought into the harbor on barges.

https://www.offshorewind.biz/2018/03/16/sif-and-ewa-tackle-foundation-logistics-challenge-in-asia/

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Innovative Inspection of Offshore Foundations

Posted by Charles Decuir on February 28, 2018 12:20 PM EST
Charles Decuir photo

Using Interfering Sound Waves for Monopile Investigation

Offshore wind farm operators face a challenge when trying to establish the integrity of the monopile-transition piece interface which has been used in 80% of turbines constructed before 2012. A key focus is the layer of grout which bonds the two steel sections of the structure, the integrity of which could affect the turbine’s long-term stability. Uniper Technologies, working with a team from the British Geological Survey, has developed a system, the first of its kind, which uses interfering sound waves to investigate the monopile-transition piece underwater and highlight any areas of defective or missing grout. The system, which has been successfully trialled at sea, was a winner of the recent Subsea Inspection competition organised by the Carbon Trust’s Offshore Wind Accelerator. Importantly the technique can inspect the structure from a single surface and within the tight timescales required for offshore procedures. Inspection data is interpreted and shared in a transparent format.

https://www.windtech-international.com/editorial-features/innovative-inspection-of-offshore-foundations

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All 60 foundations have been installed in the seabed of the Baltic Sea ahead of schedule. The monopiles, which weigh around 1,200 tons, were tied up to 40 meters deep into the seabed. One success factor was the three-dimensional seismic investigation of the subsoil prior to installation.

https://www.windtech-international.com/projects-and-contracts/installation-of-the-foundations-of-arkona-offshore-wind-farm-completed-ahead-of-schedule

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The world’s first full scale floating wind turbine is being installed off the coast of north-east Scotland. The floating foundations will enable turbines to operate in deeper waters and will dramatically reduce the cost of installation.

 

In total five Siemens Gamesa 6MW turbines are being installed at the Peterhead wind farm, known broadly as Hywind, which will provide power to 20,000 homes.

Norwegian oil and gas giant Statoil has produced the turbines and hope that the floating foundations will enable turbines to be installed in many viable sites that are currently too deep for monopiles.

http://www.eurekamagazine.co.uk/design-engineering-news/floating-foundations-world-first-for-offshore-wind/157817/

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Blyth foundations take shape

Posted by Charles Decuir on January 16, 2017 10:20 AM EST
Charles Decuir photo

The construction of the gravity-base foundations for the 41.5MW Blyth offshore wind demonstration project in England is advancing in Newcastle.

The lower shafts have been placed and the roof panels are about to be mounted, BAM Infra said.

The Royal BAM unit is building the innovative foundations at the Neptune dry dock on the Tyne for EDF. They will feature a hybrid structure comprising a concrete lower section and a steel monopile.

http://renews.biz/105543/blyth-foundations-take-shape/

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Blyth foundations take shape

Posted by Charles Decuir on January 16, 2017 10:15 AM EST
Charles Decuir photo

The construction of the gravity-base foundations for the 41.5MW Blyth offshore wind demonstration project in England is advancing in Newcastle.

The lower shafts have been placed and the roof panels are about to be mounted, BAM Infra said.

The Royal BAM unit is building the innovative foundations at the Neptune dry dock on the Tyne for EDF. They will feature a hybrid structure comprising a concrete lower section and a steel monopile.

http://renews.biz/105543/blyth-foundations-take-shape/

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The use of sensors and condition monitoring (CM) technologies to collect continuous real time measurements on wind turbine foundations as a means of detecting the existence of damage, identifying the location of damage, assessing the type and severity of damage, and estimating the remaining useful life (RUL) has been significantly growing in recent years. Quite often, considerable errors are reported between the measured structural modal properties through inspection and the simulated results based on CM-base dataset due to various “uncertainties”. 

http://www.jobs.ac.uk/job/AVS288/engd-reliability-of-condition-monitoring-technologies-for-offshore-wind-foundations-under-uncertainty/

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