Lhyfe has inaugurated its offshore renewable green H2 production demonstrator in Saint-Nazaire. This is the first time in the world that renewable H2 will be produced at sea. The Sealhyfe platform, which seeks to pave the way for a new energy paradigm awaited worldwide, is starting an 18-month experimental period, at quay then off the coast of Le Croisic, on the offshore testing site (SEM-REV) operated by French engineering school Centrale Nantes.
Producing H2 at sea: A global challenge to be tackled
Around the world, the race for H2 is on and the development of offshore wind farms is booming. Lhyfe – which inaugurated the world’s first site to produce H2 from onshore wind turbines in September 2021 and which is currently preparing to deploy its solutions Europe-wide – is convinced of the central role offshore must play in the massification of renewable green H2 production.
Producing H2 using offshore wind turbines could allow all countries with a coastline to access renewable green H2, produced locally, beyond the horizon line, and in industrial quantities, to decarbonize transportation and industry. However, until now, no one has ever produced H2 at sea. It is to prove that it is now possible that Lhyfe is today taking on the great offshore challenge.
A series of major and unprecedented challenges
Through this pilot site, Lhyfe will produce the first kilograms of renewable green H2 at quay and then at sea, operating automatically, in the most extreme conditions. The company has voluntarily set the bar high by installing its production unit on a floating platform, connected to a floating wind turbine.
The Sealhyfe platform must therefore meet several major and unprecedented challenges, including:
A demonstrator developed with top experts
To achieve this technological feat, Lhyfe relied on the facilities of the offshore testing site, SEM-REV, operated by Centrale Nantes.
The electrolyzer was supplied and optimized for these exceptional operating conditions by Plug Power, one of the market leaders that is strongly engaged in the offshore route. Together, Plug and Lhyfe have developed the first electrolyzer capable of operating on a floating platform.
The project also benefited from the expertise of French offshore and marine renewable energy players:
A multi-phase trial
A first six-month trial phase is being started at quay, in the port of Saint-Nazaire, to obtain initial reference measurements and test all the systems (desalination and cooling systems, stack behavior, remote control, energy management, resistance to environmental conditions, etc.).
At the end of this first stage, Sealhyfe will spend a period of 12 months off the Atlantic coast. It will be installed less than a kilometer from the floating wind turbine, fixed to the ground by a system of anchors and connected to the site’s underwater hub using an umbilical designed and dedicated for this application (energy and data transfer).
At the end of this trial, Lhyfe will have a substantial volume of data, which should allow it to design mature offshore production systems, and to deploy robust and proven technologies on a large scale, in keeping with the EU’s objective to produce 10 MMtpy of renewable H2 by 2030.
Sealhyfe has the capacity to produce up to 400 kg of renewable green H2 a day, equivalent to 1MW of power. By 2030-2035, offshore could represent an additional installed capacity of around 3 GW for Lhyfe. Sealhyfe has had support from the French energy and environment agency ADEME and the Pays de la Loire Region.
Matthieu Guesné, Chairman and CEO and founder of Lhyfe said, “At Lhyfe, we have only one aim: to leave a more breathable planet for our children. Therefore, we once again wanted to take up a major technological challenge, to prove – by producing hydrogen at sea for the first time – that it is possible to do it as of today. By paving the way for the mass production of renewable hydrogen at sea, Sealhyfe is fully in line with the EU’s strategy to deploy an offshore hydrogen chain and wishes to help build the energy sovereignty of countries.”