QED Naval Launch Subhub Community Demonstrator Website

QED Naval have launched this new and exciting website to promote the Subhub Community Demonstrator (SH-CD) and to keep stakeholders and local communities informed with the latest developments in our test programme and provide a platform for everyone to provide feedback on our work.

The SH-CD is currently situated within Strangford Lough in Northern Ireland, working with local marine contractors Cuan Marine to test the performance of its ballast system. The trials have been very successful and have demonstrated the Subhub’s seamless installation and recovery process.

Local community groups such as Portaferry Past and Future have taken a keen interest. QED Naval have been working closely with local planning authorities DAERA to ensure the impact of trials are respectful to the test site’s ecology and beneficial in terms of economic output of local tidal energy supply.

We would welcome feedback on our project so please feel free to leave your comments using the link at the foot of this website.

We are currently raising funds for the next stage of the project which is to conduct long term submergence trials on the Subhub tidal platform to feed into an Operations and Maintenance strategy for the Subhub. We will also be monitoring the environmental impact of the Subhub on the seabed and the area around it.

The company plan to purchase a tidal turbine and fit it to the Subhub for performance trials to validate claims of up to 50% more energy yield from a tidal sites. This is clearly site dependent but it is expected to validate the company’s projection using their tidal modelling software called TWEET (Tidal and Wave Energy Evaluation Tools).

QED Naval have requested sample power data from a couple of local businesses in Portaferry so we can get a sense of the area’s energy requirements. The aim is to potentially help the community move towards the net zero CO2 targets being set by the government.

Subhub in its transit condition at the surface preparing to be installed on site.


Subhub Proves Low Cost Installation Method

QED Naval have proven the effectiveness of the Subhub’s ballast system during May with many installations and retrieval trials of the Subhub tidal platform over a range of conditions and water depths.

Managing Director, Jeremy Smith says, we are absolutely delighted with the performance of the Subhub and especially the ballast system which behaved as predicted. The stability of the Subhub was excellent throughout each stage of the process and level of control of descent in the dive condition is impressive, equally in surfacing.

Subhub makes installation and recovery of tidal turbines a quick, push button exercise. It can be described as a  self-installing platform which is also self-aligning to the flow. In a single, quick offshore operation an array of tidal turbines can be installed and operational within the hour. No other moorings are required which reduces the environmental impact on the seabed given the simplicity of the tripod, gravity based design.

The video below shows the installation and recovery process takes less than 15 minutes each way. The whole process is controlled from a simple, low cost, installation barge or support vessel using the Subsea Manifold which acts as a remote control unit for the Subhub.

Once installed, the Subhub is completely invisible with navigational clearance of at least 3m from which allows most leisure craft users to pass over the top of the device. More importantly it maintains the seascape and installation and retrieval process doesn’t appear to disturb the fish in the area or cause lasting impacts on the seabed.

Subhub addresses the issue of high LCOE costs of marine renewables directly. It enables low cost deployment and maintenance of tidal turbines with enhanced annual yield which significantly increases revenue, year on year, leading to large reductions in LCOE.

QED Naval are now looking to re-deploy its Subhub Community Demonstrator either within a community project within Strangford Lough or a new project on the West Coast of Scotland.