Model-based Interpretation of the Performance and Degradation of Reformate Fueled Solid Oxide Fuel Cells

Model-based Interpretation of the Performance and Degradation of Reformate Fueled Solid Oxide Fuel Cells
Title Model-based Interpretation of the Performance and Degradation of Reformate Fueled Solid Oxide Fuel Cells PDF eBook
Author Alexander Kromp
Publisher KIT Scientific Publishing
Pages 146
Release 2014-05-12
Genre Technology & Engineering
ISBN 373150006X

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Solid oxide fuel cells offer great prospects for the sustainable, clean and safe conversion of various fuels into electrical energy. In this thesis, the performance-determining loss processes for the cell operation on reformate fuels are elucidated via electrochemical impedance spectroscopy. Model-based analyses reveal the electrochemical fuel oxidation mechanism, the coupling of fuel gas transport and reforming chemistry and the impact of fuel impurities on the degradation of each loss process.

Finite Element Method (FEM) Model and Performance Analysis of Solid Oxide Fuel Cells

Finite Element Method (FEM) Model and Performance Analysis of Solid Oxide Fuel Cells
Title Finite Element Method (FEM) Model and Performance Analysis of Solid Oxide Fuel Cells PDF eBook
Author Geisler, Helge Ingolf
Publisher KIT Scientific Publishing
Pages 292
Release 2019-07-10
Genre Technology & Engineering
ISBN 3731508958

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This work presents a numerical FEM framework, capable of predicting SOFC performance under technically relevant, planar stack contacting conditions. A high level of confidence in the model predictions is supplied by using exclusively experimentally determined material/kinetic parameters and by a comprehensive validation. The presented model aids SOFC stack development by pre-evaluating possible material choices and design combinations for cells/interconnectors without any experimental effort.

Microstructural Characterisation, Modelling and Simulation of Solid Oxide Fuel Cell Cathodes

Microstructural Characterisation, Modelling and Simulation of Solid Oxide Fuel Cell Cathodes
Title Microstructural Characterisation, Modelling and Simulation of Solid Oxide Fuel Cell Cathodes PDF eBook
Author Joos, Jochen
Publisher KIT Scientific Publishing
Pages 246
Release 2017-06-29
Genre Technology (General)
ISBN 3731506254

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This work deals with microstructural characterisation, modelling and simulation of SOFC electrodes with the goal of optimizing the electrode microstructures. Methods for a detailed electrode analysis based on focused ion beam (FIB) tomography are presented. A 3D FEM model able to perform simulations of LSCF cathodes based on 3D tomography data is shown. A model generating realistic, yet synthetic microstructures is presented that enables the optimization of microstructural characteristics.

Electrochemical Performance and Stability of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ for Oxygen Transport Membranes

Electrochemical Performance and Stability of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ for Oxygen Transport Membranes
Title Electrochemical Performance and Stability of Ba₀.₅Sr₀.₅Co₀.₈Fe₀.₂O₃₋δ for Oxygen Transport Membranes PDF eBook
Author Niedrig, Christian
Publisher KIT Scientific Publishing
Pages 206
Release 2015-12-23
Genre Technology (General)
ISBN 3731504375

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Mixed ionic-electronic conducting (MIEC) ceramics as oxygen transport membranes (OTMs) can provide high oxygen permeation rates at comparably low energy demands. For this purpose, Ba?.?Sr?.?Co?.?Fe?.?O??? (BSCF) shows the best performance under ideal operating conditions. Thermal and chemical stability investigations, electrical behavior ?(T,pO?,t), and oxygen exchange parameter extraction by means of electrical conductivity relaxation resulted in a far better understanding of the BSCF system.

Physically based Impedance Modelling of Lithium-Ion Cells

Physically based Impedance Modelling of Lithium-Ion Cells
Title Physically based Impedance Modelling of Lithium-Ion Cells PDF eBook
Author Illig, Joerg
Publisher KIT Scientific Publishing
Pages 231
Release 2014-09-19
Genre Technology & Engineering
ISBN 3731502461

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In this book, a new procedure to analyze lithium-ion cells is introduced. The cells are disassembled to analyze their components in experimental cell housings. Then, Electrochemical Impedance Spectroscopy, time domain measurements and the Distribution function of Relaxation Times are applied to obtain a deep understanding of the relevant loss processes. This procedure yields a notable surplus of information about the electrode contributions to the overall internal resistance of the cell.

Developing Critical Cultural Awareness in Modern Languages

Developing Critical Cultural Awareness in Modern Languages
Title Developing Critical Cultural Awareness in Modern Languages PDF eBook
Author Elinor Parks
Publisher Routledge
Pages 0
Release 2020-01-20
Genre Education
ISBN 9781000034165

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This volume explores the relationship between language and culture while considering its implications for the teaching of modern foreign languages in higher education. Drawing on a comparative empirical study conducted at universities both in the UK and US, this text problematises the impacts of a separation of language and content in German degree programmes. Illustrating the need for a curriculum which fosters the development of intercultural competence and criticality, Parks reconceptualises established models of criticality (Barnett) and intercultural communicative competence (Byram). The chapters in this volume discuss a range of important topics including; language graduates with deep translingual and transcultural competence, observed differences and similarities between British and American universities and faculty and student voices: developing intercultural competence and criticality. Aimed at scholars with research interests in intercultural communication, language education and applied linguistics, this volume provides a thorough discussion for the ways in which modern language programmes in higher education can be improved. Additionally, those carrying out research in the fields of language teaching and language policy in higher education will find Developing Critical Cultural Awareness in Modern Languages to be of great relevance.

Fuel Cell Fundamentals

Fuel Cell Fundamentals
Title Fuel Cell Fundamentals PDF eBook
Author Ryan O'Hayre
Publisher John Wiley & Sons
Pages 612
Release 2016-05-02
Genre Science
ISBN 1119113806

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A complete, up-to-date, introductory guide to fuel cell technology and application Fuel Cell Fundamentals provides a thorough introduction to the principles and practicalities behind fuel cell technology. Beginning with the underlying concepts, the discussion explores fuel cell thermodynamics, kinetics, transport, and modeling before moving into the application side with guidance on system types and design, performance, costs, and environmental impact. This new third edition has been updated with the latest technological advances and relevant calculations, and enhanced chapters on advanced fuel cell design and electrochemical and hydrogen energy systems. Worked problems, illustrations, and application examples throughout lend a real-world perspective, and end-of chapter review questions and mathematical problems reinforce the material learned. Fuel cells produce more electricity than batteries or combustion engines, with far fewer emissions. This book is the essential introduction to the technology that makes this possible, and the physical processes behind this cost-saving and environmentally friendly energy source. Understand the basic principles of fuel cell physics Compare the applications, performance, and costs of different systems Master the calculations associated with the latest fuel cell technology Learn the considerations involved in system selection and design As more and more nations turn to fuel cell commercialization amidst advancing technology and dropping deployment costs, global stationary fuel cell revenue is expected to grow from $1.4 billion to $40.0 billion by 2022. The sector is forecasted to explode, and there will be a tremendous demand for high-level qualified workers with advanced skills and knowledge of fuel cell technology. Fuel Cell Fundamentals is the essential first step toward joining the new energy revolution.