Techno-economic analysis for floating offshore wind and offshore green hydrogen

Abstract

This paper describes a techno-economic model for exploiting the Celtic Sea wind resource through direct productionof hydrogen offshore. The model conceives a modular approach with eight 510 MW floating windfarms,each with an electrolyser system and export compressor mounted on a jacket. The model ensures an uninterruptedhydrogen supply to an industrial cluster (16.4 te.H2/h) by incorporating salt cavern hydrogen storage.During periods of no power generation, baseload power is provided from hydrogen fuel cells. The base-casemodel with a Discount Rate of 6% returned an Levelised Cost of Hydrogen (LCoH) of £7.25 per kg of hydrogen in2023. The LCoH shows strong sensitivity to Discount Rate and electrolyser system efficiency. Electrolyser systemsand wind turbine generator floating structures are relatively new technologies not yet deployed at the GWscale, and benefit significantly from learning rates, which have the potential to substantially lower the LCoH.

Publication Date

2025-02-17

Publication Title

International Journal of Hydrogen Energy

Volume

103

ISSN

0360-3199

Acceptance Date

2025-01-11

Deposit Date

2025-02-13

Embargo Period

2026-01-21

Funding

UKRI Reference 2590893.

Keywords

Compression, Floating offshore wind in the celtic sea, Levelised cost of hydrogen LCoH, Offshore green hydrogen production, Salt cavern geological storage, UK

First Page

538

Last Page

555

This document is currently not available here.

This item is under embargo until 21 January 2026

Share

COinS