Hydrogen electrolyser pilot planned at Germany's first offshore wind farm

Alpha Ventus deployment to research feasibility of H2 production at sea and test components

Alpha Ventus test field north of German North Sea island of Borkum.
Alpha Ventus test field north of German North Sea island of Borkum.Photo: DOTI

A trio of German partners is planning to deploy a 10MW electrolyser pilot at the nation's oldest offshore wind farm to test direct production of hydrogen at sea.

Project company NorthH2, the German Offshore Test Field and Infrastructure operating firm (DOTI) and the country’s Offshore Wind Foundation signed a declaration of intent to install the electrolyser at Alpha Ventus in the North Sea.

The 60MW Alpha Ventus array was opened in 2010, kick-starting Germany’s expansion of wind at sea that led to a cumulative capacity of 8.5GW at the end of last year.

The offshore electrolyser project aims to demonstrate the feasibility and efficiency of hydrogen production directly at sea and to test required components. The proton exchange membrane (PEM) electrolyser is slated to be placed on a wind turbine foundation, said a statement which gave few details of the plan or its timings.

“The 10MW offshore electrolysis demonstrator is a crucial step towards enabling the production of green hydrogen directly at sea,” NorthH2 managing director Andreas Wellbrock said.

“This will help us to significantly increase the efficiency and sustainability of hydrogen production while avoiding the challenges of grid connection issues.”

Ambitious plans to dedicate enough offshore wind power to enable 10GW of electrolysis capacity for the production of green hydrogen in 2035 under the AquaVentus scheme have been stagnant lately as the sector is “desperately” awaiting a first German tender for offshore wind-to-hydrogen areas in the North Sea. The tender plans are up in the air as Germany in February will hold snap elections with an uncertain outcome.

"The market ramp-up in the hydrogen sector is currently confronted with many different technical and economic challenges that need to be overcome,” Offshore Wind Foundation managing director Karina Würtz said.

“This is even more true for hydrogen production at sea. Here, one should first test with a cool head how the harsh conditions of the North Sea affect the technology components and maintenance requirements."

As soon as the planned AquaDuctus pipeline included in Germany’s hydrogen core network connects the North Sea with the pipeline network on land, the electrolyser demonstrator can be connected and the hydrogen can be fed in, the companies said.
NorthH2 is a project company separate from the NortH2 plan under which a consortium of companies several years ago had planned to produce green hydrogen from up to 10GW of Dutch offshore wind capacity.
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Published 26 November 2024, 14:51Updated 26 November 2024, 15:23
EuropeGermanyAquaVentusOffshore windTechnology