Green hydrogen: the crucial performance of electrolysers fed by variable and intermittent renewable electricity

“…Furthermore, if the discontinuity is long enough, the electrolyser cools down, and warming-it up again incurs an energy cost that directly impacts system efficiency. These effects impact the balance of plant (BoP) [3]. The simulation study of the electrolyser and its performance within the BoP can not only clarify proper designs but also effectively reduce the time and costs associated with experimental testing.…”

Section: Introductionmentioning

confidence: 99%

Modelling thermal dynamics in intermittent operation of a PEMEL for green hydrogen production

de les Valls,

Capdevila,

Jaramillo

et al. 2024

J. Phys.: Conf. Ser.

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Green hydrogen plays a pivotal role in the imminent energy transition, addressing energy storage and electricity generation decarbonization. The European Commission’s hydrogen strategy underscores the goal to install at least 40 GW of green hydrogen electrolysers by 2023. Despite various electrolyser technologies, efficiency improvement and durability enhancement remain challenges, especially considering voltage intermittencies from renewable energy sources. This study emphasizes the impact of thermal gradients within electrolysers due to voltage interruptions, affecting membrane operation and causing premature wear. The study explores methods to minimize thermal gradients, revealing trade-offs between efficiency and durability. A lumped-parameter numerical model is developed and experimentally adjusted to simulate electrochemical and energy transport phenomena. Experimental and numerical results are compared, highlighting the need for a comprehensive thermal management code for effective electrolyser performance. The study addresses the importance of accurately modelling transient thermal responses for both proton exchange membrane electrolysis (PEMEL) and solid oxide electrolysis (SOEL) designs, providing insights for future advancements in thermal management strategies.

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“…On the other hand, electrochemical water splitting, when coupled with renewable energy (e.g. solar and wind), has been proposed to be a very promising approach to the production of 'green' hydrogen (H 2 ), which holds great potential for decarbonising the transport and power sectors as well as the 'hard-to-abate' industry [4]. In a water electrolyser, H 2 is produced at the cathode through the hydrogen evolution reaction (HER), and meanwhile oxygen (O 2 ) is generated at the anode via the oxygen evolution reaction (OER).…”

Section: Introductionmentioning

confidence: 99%

Multimetallic transition metal phosphide nanostructures for supercapacitors and electrochemical water splitting

2022

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Transition metal phosphides (TMPs) have recently emerged as an important class of functional materials and been demonstrated to be outstanding supercapacitor electrode materials and catalysts for electrochemical water splitting. While extensive investigations have been devoted to monometallic TMPs, multimetallic TMPs have lately proved to show enhanced electrochemical performance compared to their monometallic counterparts, thanks to the synergistic effect between different transition metal species. This topical review summarizes recent advance in the synthesis of new multimetallic TMP nanostructures, with particular focus on their applications in supercapacitors and electrochemical water splitting. Both experimental reports and theoretical understanding of the synergy between transition metal species are comprehensively reviewed, and perspectives of future research on TMP-based materials for these specific applications are outlined.

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Green hydrogen: the crucial performance of electrolysers fed by variable and intermittent renewable electricity

Cited by 30 publications

References 1 publication

Electrochemical hydrogen production: sustainable hydrogen economy

Electrochemical hydrogen production: sustainable hydrogen economy

Modelling thermal dynamics in intermittent operation of a PEMEL for green hydrogen production

Multimetallic transition metal phosphide nanostructures for supercapacitors and electrochemical water splitting

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