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Static and Dynamic Characterization and Modeling of an Intermediate Temperature Solid Oxide Fuel Cell Stack (IT-SOFC)

par Laurence Laffont - publié le , mis à jour le

Jonathan LESMAYOUX’s thesis defense, intitled "Caractérisation et modélisation en régimes statique et dynamique d’un stack pile à combustible à oxyde solide de température intermédiaire (IT-SOFC)" (Static and Dynamic Characterization and Modeling of an Intermediate Temperature Solid Oxide Fuel Cell Stack (IT-SOFC)) will be held on Tuesday, January 4th 2022.

Beacause of the current sanitary measures, only a video link may be used : https://inp-toulouse-fr.zoom.us/j/94805997475.
Mind turning off your camera and microphone.

Jury  :

Marie-Cécile PÉRA (Professor, FCLAB, Belfort), Rapporteur

Jonathan DESEURE (Senior Lecturer, LEPMI, Grenoble), Rapporteur

Julie MOUGIN (Head of Services, CEA, Grenoble), Reviewer

Olivier JOUBERT (Professor, IMN, Nantes), Reviewer

Sofyane ABBOU (Safran Power Units Ingeneer), Guest

Pascal LENORMAND (Senior Lecturer, CIRIMAT, Toulouse), Guest

Abstract

The work of this thesis is part of the SOFAERO project (High temperature fuel cells SOFC for aeronautical applications), led by the LAPLACE laboratory in partnership with Safran Power Units. This project focuses on the study of SO technology components and the evaluation of their potential in an aeronautical environment. During this thesis work, we focused on the operation of Intermediate Temperature Solid Oxide Fuel Cells (IT-SOFC - 650°C). The first part of the manuscript transcribes the culture we have acquired on SO components starting from the materials making up a cell to the integration of this technology into systems. The second part describes the test resources used and the first test campaigns carried out. In the third part, we propose a quasi-static model of the equivalent mean cell of an IT-SOFC stack, model adapted from the work carried out within the LAPLACE laboratory on Proton Exchange Membrane technologies (PEM) low temperature (LT) and more recently high temperature (HT). One of the strong assumptions for this modelling is that we considered a constant and homogeneous internal temperature within the stack when plotting the polarization curves. In a fourth part, we discuss this hypothesis by proposing a model taking into account, this time, the temperature variation during the plotting of the polarization curves. In this context, we present an original method that we have developed to estimate the internal temperature of the stack without using internal temperature measurements (non-existent within the component tested). This fourth part continues by presenting our first work on the dynamic modelling of an IT-SOFC stack, via the modelling of the impedance spectra measured jointly with the polarization curves.