22 Sep 2021

Towards Zero Emission Hydrogen Fuel Cell Technology for USVs

22 Sep 2021  by   

SEA-KIT International, a leading designer and builder of USVs, has won funding to install an innovative PCB-based hydrogen fuel cell, engineered by project partner Bramble Energy, on its 12m USV Maxlimer and to demonstrate zero emission maritime operations.

SEA-KIT USV Maxlimer on recent capability demonstrations.

SEA-KIT secured the grant through the recent Clean Maritime Demonstration Competition (CMDC) – Strand 2. The project, funded by the Department for Transport (DfT) working with InnovateUK, will showcase a successful diesel to hydrogen conversion of SEA-KIT’s proven uncrewed surface vessel (USV) design and demonstrate a route to fulfilling the UK’s Clean Maritime Plan Strategy commitment of reducing greenhouse gas emissions from shipping by at least 50% by 2050.

Decarbonizing Technology for the Hydrographic Industry

“SEA-KIT USVs have a dual diesel-electric hybrid drive, with propulsion coming from an electric motor powered by battery banks that are charged by in situ diesel generators,” said Ben Simpson, SEA-KIT CEO. “This project will replace one of the diesel generators with new hydrogen fuel cell technology from Bramble Energy and demonstrate an offshore operation with zero carbon emissions.”

West Sussex-based Bramble Energy, a disruptor in the clean tech space, will design and manufacture a marinized, customized version of its printed circuit board fuel cell (PCBFC). The use of PCBs, as opposed to metallic or graphite end plates, makes the technology more suited to rugged, marine environments. Bramble Energy’s PCBFC system will sit inside an enclosure within the USV to prevent sea water ingress and corrosion.

Dr Vidal Bharath, COO of Bramble Energy, said: “Bramble Energy is committed to powering a net zero economy. This project provides the perfect opportunity to demonstrate our decarbonizing technology in a real-world, challenging environment across a new industry with an exciting commercial partner.”

SEA-KIT will retrofit its demonstration vessel USV Maxlimer with the hydrogen fuel system. Data gathered from bench testing and sea trials will be utilized for the design and build of similar USVs, as well as for larger uncrewed vessel builds in the near future.

Hydrogen Fuel Systems

USVs are already being deployed for a range of commercial tasks, including geophysical surveys, offshore inspections, surveillance and coastal asset monitoring. This collaboration between SEA-KIT and Bramble Energy aims to enable the emergence of hydrogen fuel systems as another viable option for the fast-growing USV market.

Innovate UK, the UK’s innovation agency, drives productivity and economic growth by supporting businesses to develop and realize the potential of new ideas. The CMDC projects represent the first major investment from DfT specifically aimed to drive innovation within the maritime industry.

Simon Edmonds, deputy executive chair and chief business officer for Innovate UK, said: “As the UK prepares to host COP26 in the maritime city of Glasgow, it is great that we can announce funding for these fantastic projects in the maritime sector that will help the UK meet its net zero goals. In this competition, we have seen a very high level of demand and the very best of British ideas from all over the country. It is clear that not only does the UK have a great maritime history, but also a bright and greener future too.”

With the application of a hydrogen fuel source in a USV, the UK is taking a leading position in zero emissions in uncrewed technology for sustainable maritime operations.

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