Browsing by Author "Pérez, Manuel"

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    An in-depth system-level assessment of green hydrogen production by coupling solid oxide electrolysis and solar thermal systems
    (2025) Arias, Ignacio; Castillejo Cuberos, Armando; Battisti, Felipe G.; Romero Ramos, J.A.; Pérez, Manuel; González Portillo, L.F.; Valenzuela, Loreto; Cardemil Iglesias, José Miguel; Escobar, Rodrigo
    This study presents a comprehensive techno-economic analysis of green hydrogen production utilizing a third-generation Concentrated Solar Power system integrated with Solid Oxide Electrolysis Cells, examining system configurations under variable climatic conditions in Chile and Spain. By employing dynamic simulation models that consider hourly and sub-hourly datasets, the research assesses the impact of solar irradiance variability on hydrogen production efficiency. The integration approach explores the efficacy of utilizing high-temperature solar power-derived heat for enhanced electrolysis operation, highlighting the critical influence of solar resource quality and data temporal resolution in system performance. Several scenarios involving different solar multiples, thermal energy storage capacities, and electrolyzer sizes were analyzed to identify their effects on the Levelized Cost of Hydrogen. The economic analysis reveals that this cost is notably sensitive to operational parameters and system configurations, suggesting that optimal integration and scaling of solar power and electrolysis technologies could significantly reduce hydrogen production costs. The findings underscore the need for targeted energy policies and investments in renewable technologies to support cost-effective hydrogen production, promoting future research focusing on advanced materials for electrolysis cells and improved system integration strategies. This work enhances the understanding of integrating advanced solar thermal and electrolysis technologies, providing a robust framework for advancing global sustainable energy solutions.
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    Assessing system-level synergies between photovoltaic and proton exchange membrane electrolyzers for solar-powered hydrogen production
    (2024) Arias Olivares, Ignacio Javier; G. Battisti, Felipe; Romero Ramos, J. A.; Pérez, Manuel; Valenzuela, Loreto; Cardemil Iglesias, José Miguel; Escobar Moragas, Rodrigo Alfonso
    This study delves into the techno-economic benefits of integrating Proton Exchange Membrane electrolyzers with photovoltaic systems for hydrogen production, with a keen focus on cost optimization strategies. A comprehensive analysis of several system scales and cost scenarios unveils the critical roles of Proton Exchange Membrane stack systems and the Balance of Plant components in influencing capital expenditures. Notably, the research identifies that incorporating the grid via a complementary Power Purchase Agreement, alongside clipped solar energy, innovatively redistributes cost elements. This approach significantly reduces the levelized cost of hydrogen, thereby enabling the feasibility of hydrogen production in regions characterized by low solar radiation at the cost of high grid electricity penetration. Sensitivity to energy costs, accentuated by different integration schemes, highlights the pivotal role of the stack cost and the Balance of Plant cost reductions in achieving economic viability for large-scale deployments. The study underscores the necessity of holistic cost optimization, revealing that strategic grid support coupled with solar energy enhances the techno-economic performance and broadens the scope for renewable hydrogen production in less favorable locales. These insights offer invaluable guidance to stakeholders, advocating for advanced integration strategies that promise both efficiency and financial sustainability in the burgeoning field of renewable hydrogen production systems.