Modelling and analysis of the dynamic behaviour of a PEM electrolysis system under intermittent operating mode: a Bond Graph approach
Description
PEM Electrolysis is a technology which to enable to face two major challenges: (i) Fulfill the need of energy storage caused by the integration of intermittent energy sources on electricity networks; (ii) Cope with the growing need of carbon free hydrogen caused by the future market applications of hydrogen energy. These particular needs, regarding electrolysis technology development, involve an intermittent operating mode which impacts on the dynamic behavior of the system remain unknown. Modelling is a critical tool to understand these issues and provide a thorough analysis. State of the art of existing modelling works highlighted that only a few models take into account the dynamic of the whole system including Balance of Plant. Therefore a new dynamic and multiphysics model was developed under Bond Graph formalism. This graphical modelling formalism was selected especially thanks to its ability to represent any kind of power exchange in a unified way. The model enables to represent the whole system including balance of plant and associated control laws. It is validated on the dynamic behavior of an experimental device available in CEA. The model is then used in order to identify and understand the issues related to intermittent operation of a PEM electrolysis system. These issues are related to system efficiency, flexibility, reliability, safety and durability. Regarding these issues, some design changes are simulated and assessed. Finally, the Bond Graph model and its structural properties enable to perform diagnosis and monitor ability analyses of a PEM electrolysis system. (author)
Abstract (French)
L'electrolyse est une technologie qui permet de repondre a deux problematiques cruciales. D'une part, repondre au besoin en stockage d'energie liee a l'integration de sources intermittentes sur les reseaux electriques. D'autre part, repondre a la croissance de la demande en hydrogene, liee aux marches naissants de l'hydrogene energie. La nature des besoins lies au developpement de la technologie d'electrolyse implique des sollicitations intermittentes dont les impacts quant au fonctionnement du systeme sont encore meconnus. En ce sens, et face aux manques de la litterature quant a la modelisation a l'echelle systeme de la technologie d'electrolyse PEM, un nouveau modele est developpe. Pour cela, le formalisme de modelisation graphique Bond Graph est utilise, notamment pour sa capacite a representer tout type d'echange energetique de maniere unifiee. Le modele developpe permet de representer l'integralite d'un systeme d'electrolyse PEM, ses differents composants et lois de controle associees. Il est valide sur la base du comportement dynamique d'une installation semi-industrielle disponible au CEA. Ce modele est ensuite utilise pour identifier et comprendre les enjeux liees a une sollicitation intermittente d'un systeme d'electrolyse PEM d'un point de vue de l'efficacite du systeme, de sa flexibilite et de sa capacite de suivi de charge, de sa fiabilite, de sa surete ou encore de sa durabilite. Differentes modifications de conception sont simulees et evaluees a la lumiere de ces differents enjeux. Finalement, le modele Bond Graph est exploite d'un point de vue de ses proprietes structurelles afin d'analyser les conditions de surveillabilite d'un systeme d'electrolyse PEM
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Additional details
Additional titles
- Original title (French)
- Modelisation et analyse du comportement dynamique d'un systeme d'electrolyse PEM soumis a des sollicitations intermittentes: Approche Bond Graph
Publishing Information
- Imprint Pagination
- 263 p.
- Report number
- FRCEA-TH--14905
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 54015257
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S08: HYDROGEN;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- COMPUTERIZED SIMULATION; ELECTROLYSIS; HYDROGEN; MONITORING; POWER DEMAND; PROTON EXCHANGE MEMBRANE FUEL CELLS; RELIABILITY; STORAGE
- Descriptors DEC
- DEMAND; DIRECT ENERGY CONVERTERS; ELECTROCHEMICAL CELLS; ELEMENTS; FUEL CELLS; LYSIS; NONMETALS; SIMULATION; SOLID ELECTROLYTE FUEL CELLS
Optional Information
- Notes
- 202 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses