Category Archives: Production

Subhub Gets Lift Off

QED Naval are pleased to annouce the acceptance of the Subhub – Kraken’s main hull fabrication including all outfit hotwork.

An important part of the acceptance was the main hull lift off the cradle and supporting structure onto the Subhub’s main leg structure to fully support her ample weight.

Factory Acceptance Tests (FATs) which pressurised each of the ballast tanks were completed successfully along with all the load testing of the lifting equipment including the main hull lifting lugs (68t load) and the modular solid ballast blocks (2 off) each weighing 20t.

All the welding plans and Non-Destructive Tests (NDTs) have been completed and approved.

QED Naval would like to take the opportunity to thank their prime contractors, Cimpina, in their support and commitment that they have provided to get the project to this point of completion.

QED Naval have now taken responsibility for all the outfitting of the Subhub and has completed all the internal outfit. Kraken is now awaiting painting which will be completed in early October.

QED Naval are currently commissioning and testing all the ballast and instrumentation systems prior to a planned launch in early 2018.

Subhub aft end showing the semi-duct that accelerates the flow into the turbines for increased power output and yield.
Subhub undergoing FATs pressure testing where each tank is pressurised to ensure water tightness and hydrostatic load capability.
The power of buoyancy! Amazing to think that this small compressor can lift almost 200 tons from the seabed in such a stable way over such large tidal and wave weather windows.

Cimpina Awarded Subhub Build Contract

Cimpina based in Northern Ireland in Belfast Docks have been awarded the build contract for the Subhub. They were among 6 different fabricators contending for the business.

Work commenced in November and the outer shell was taking shape before Christmas. Completion is expected in the first quarter of next year.

Keel Laying Team with Toasts of Scapa (Orkney Whiskey) and Champagne.
Keel laying ceremony with representatives from Cimpina * QED Naval toasting the commencement of build using of Scapa Whiskey (Orkney water of life).

The Community Subhub with a capacity of 200kW using Schottel tidal turbines will be launched and transported up to EMEC where long term testing will be conducted, as part of the FORESEA project, to demonstrate the Subhub’s capabilities with installation and retrieval. The performance of the Subhub and turbines will be monitored. Long term operations and maintenance strategy will be developed to validate the OPEX cost model and hence the LCOE for a Subhub related project.

External shell and bulkheads taking shape.
External shell and bulkheads taking shape.
Outer shell supported by the upstands.
Outer shell supported by the upstands.