Wind turbines and photovoltaic systems at sea generate significantly more electricity and more regularly than their counterparts on land: The average rated output of onshore wind turbines is around 3.5 megawatts, that of offshore systems 5 megawatts. The SeagarH2 hydrogen lead project wants to use this potential by using renewable electricity directly at sea to produce hydrogen and hydrogen derivatives.
SeagarH2 wants to integrate the water electrolyser directly into its already developed Seagar wind/solar system - and thus provide innovative technologies to generate offshore green hydrogen. The direct coupling of Seagar wind/solar system and electrolyser is intended to minimize the costs of hydrogen production. Another advantage of hydrogen production in the sea: There are far larger potential areas available for generating wind/solar energy than on land.
Because of the numerous advantages of production at sea, SeagarH2 is also working on solutions to directly produce downstream products such as green methanol or green ammonia with green hydrogen - i.e. offshore Power-to-X. In order for this to succeed, SeagarH2 also intends to further advance forward-looking approaches such as water vapor electrolysis and seawater electrolysis. In addition, carbon dioxide and nitrogen, which are to be obtained from the air or seawater, are required as input materials for the Power-to-X products. In addition, answers to open questions about safety and possible environmental impacts are to be worked out. Likewise for life cycle analyzes and technology assessments.
SeagarH2 is currently researching the electrolyser that Seagar plans to integrate into its novel Seagar wind/solar system. This innovative, compact water electrolyser is said to work efficiently and quasi-autonomously despite the harsh conditions at sea. To this end, SeagarH2 is developing processes for water treatment and provision for electrolysis, but also for storing the hydrogen produced. Furthermore, SeagarH2 simulates the operation and calculates the costs of the electrolyser in the wind turbine. This allows the conditions for profitable operation of the system to be identified.