Subsea study published

Mon, 23 March 2015

A new report has been published by the European Marine Energy Centre (EMEC) and The Crown Estate on the performance of subsea cabling in high energy environments to support the development of commercial wave and tidal energy sites.

The aim of the Sub-sea Cable Lifecycle Study is to improve the industry’s understanding of how best to specify and manage subsea cables for wave and tidal energy projects, by investigating how the cables installed at the EMEC test sites in Orkney have been performing since installation in relation to installation methods, faults, and operational life of the cables.  

It provides a summary of the review to inform the marine renewable energy industry on factors affecting the integrity and performance of sub-sea cables but can also be put to use across other projects that will support the development of the nascent marine renewables industry

The study revealed that the sub-sea cables installed at the EMEC test sites appear to be in extremely good condition considering the environment in which they are deployed.  The report concludes that in sites with high tidal flow the greatest risk to sub-sea cables is the effect of cable strumming - vibration caused by the flow of water past the cable.

Key recommendations to developers include: carrying out calculations to assess the risk of strumming at an early stage; completing detailed site surveys and optimising the cable route to avoid key risks; and protecting the cables with armouring in high energy environments.

See the study online:

Source:  Rachael Doyle

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