Jiménez-Martín, GonzaloJudez, XabierAguado Alonso, MónicaGarbayo, Iñigo2025-06-162025-06-162024-12-22Jiménez-Martín, G., Judez, X., Aguado, M., Garbayo, I. (2024). Techno-economic assessment of MW-scale solid oxide electrolysis hydrogen production plant: integrating possibilities in Spain. International Journal of Hydrogen Energy, 142, 627-641. https://doi.org/10.1016/j.ijhydene.2024.12.239.0360-319910.1016/j.ijhydene.2024.12.239https://academica-e.unavarra.es/handle/2454/54229Solid oxide electrolysis (SOE) is regarded as the most efficient green hydrogen production technology. However, the cost competitiveness of this technology for large-scale hydrogen production is at stake due to the complexity of operating at high temperatures. This study aims to estimate the levelized cost of hydrogen (LCOH) of a MWscale SOE system and its possible integration in Spain. The heat exchanger network of a SOE system has been optimized by a pinch analysis and the techno-economic feasibility of the system has been assessed. Even if initial LCOH estimations of >6 €⋅kg− 1 are obtained with the electricity and stack costs as the major contributors, optimistic scenarios indicate that LCOH can be reduced below 4 €⋅kg− 1 , or even further by coupling the systems to heat-intensive industries such as Spanish cement or steel factories.application/pdfapplication/mswordeng© 2024 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY licenseHydrogenLCOHSOETechno-economic assessmentinfo:eu-repo/semantics/article2025-06-16info:eu-repo/semantics/openAccess