Dedicated large-scale floating offshore wind to hydrogen: Assessing design variables in proposed typologies
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Published Version
Date
2022-03-01
Authors
Ibrahim, Omar S.
Singlitico, Alessandro
Proskovics, Roberts
McDonagh, Shane
Desmond, Cian
Murphy, Jerry D.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Published Version
Abstract
To achieve the Net-Zero Emissions goal by 2050, a major upscale in green hydrogen needs to be achieved; this will also facilitate use of renewable electricity as a source of decarbonised fuel in hard-to-abate sectors such as industry and transport. Nearly 80% of the world's offshore wind resource is in waters deeper than 60 m, where bottom-fixed wind turbines are not feasible. This creates a significant opportunity to couple the high capacity factor floating offshore wind and green hydrogen. In this paper we consider dedicated large-scale floating offshore wind farms for hydrogen production with three coupling typologies; (i) centralised onshore electrolysis, (ii) decentralised offshore electrolysis, and (iii) centralised offshore electrolysis. The typology design is based on variables including for: electrolyser technology; floating wind platform; and energy transmission vector (electrical power or offshore hydrogen pipelines). Offshore hydrogen pipelines are assessed as economical for large and distant farms. The decentralised offshore typology, employing a semi-submersible platform could accommodate a proton exchange membrane electrolyser on deck; this would negate the need for an additional separate structure or hydrogen export compression and enhance dynamic operational ability. It is flexible; if one electrolyser (or turbine) fails, hydrogen production can easily continue on the other turbines. It also facilities flexibility in further expansion as it is very much a modular system. Alternatively, less complexity is associated with the centralised offshore typology, which may employ the electrolysis facility on a separate offshore platform and be associated with a farm of spar-buoy platforms in significant water depth locations.
Description
Keywords
Clean energy carrier , Power-to-X , Green hydrogen , Floating offshore wind , Floating wind to hydrogen , Offshore electrolysis , Offshore hydrogen pipelines , Hydrogen economy
Citation
Ibrahim, O. S., Singlitico, A., Proskovics, R., McDonagh, S., Desmond, C. and Murphy, J. D. (2022) 'Dedicated large-scale floating offshore wind to hydrogen: Assessing design variables in proposed typologies', Renewable and Sustainable Energy Reviews, 160, 112310 (16pp). doi: 10.1016/j.rser.2022.112310