Analytical Modelling of Fuel Cells

Analytical Modelling of Fuel Cells
Author: Andrei A Kulikovsky
Publsiher: Elsevier
Total Pages: 312
Release: 2010-06-29
Genre: Technology & Engineering
ISBN: 0444535616

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In fuel cell research, the gap between fundamental electrochemical processes and the engineering of fuel cell systems is bridged by the physical modelling of fuel cells. This relatively new discipline aims to understand the basic transport and kinetic phenomena in a real cell and stack environment, paving the way for improved design and performance. The author brings his unique approach to the analytical modeling of fuel cells to this essential reference for energy technologists. Covers recent advances and analytical solutions to a range of problems faced by energy technologists, from catalyst layer performance to thermal stability Provides detailed graphs, charts and other tools (glossary, index) to maximize R&D output while minimizing costs and time spent on dead-end research Presents Kulikovsky’s signature approach (and the data to support it)—which uses "simplified" models based on idealized systems, basic geometries, and minimal assumptions—enabling qualitative understanding of the causes and effects of phenomena

Analytical Modelling of Fuel Cells

Analytical Modelling of Fuel Cells
Author: Andrei A Kulikovsky
Publsiher: Unknown
Total Pages: 382
Release: 2019-05-09
Genre: TECHNOLOGY & ENGINEERING
ISBN: 9780444642226

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Analytical Modelling of Fuel Cells, Second Edition, is devoted to the analytical models that help us understand the mechanisms of cell operation. The book contains equations for the rapid evaluation of various aspects of fuel cell performance, including cell potential, rate of electrochemical reactions, rate of transport processes in the cell, and temperature fields in the cell, etc. Furthermore, the book discusses how to develop simple physics-based analytical models. A new chapter is devoted to analytical models of PEM fuel cell impedance, a technique that exhibits explosive growth potential. Finally, the book contains Maple worksheets implementing some of the models discussed. Includes simple physics-based equations for the fuel cell polarization curve Provides analytical solutions for fuel cell impedance Includes simple equations for calculation of temperature shapes in fuel cells Introduces physical descriptions of the basic transport and kinetic phenomena in fuel cells of various types

Analytical Modelling of Fuel Cells

Analytical Modelling of Fuel Cells
Author: Andrei A. Kulikovsky
Publsiher: Elsevier
Total Pages: 382
Release: 2019-05-03
Genre: Technology & Engineering
ISBN: 9780444642905

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Analytical Modelling of Fuel Cells, Second Edition, is devoted to the analytical models that help us understand the mechanisms of cell operation. The book contains equations for the rapid evaluation of various aspects of fuel cell performance, including cell potential, rate of electrochemical reactions, rate of transport processes in the cell, and temperature fields in the cell, etc. Furthermore, the book discusses how to develop simple physics-based analytical models. A new chapter is devoted to analytical models of PEM fuel cell impedance, a technique that exhibits explosive growth potential. Finally, the book contains Maple worksheets implementing some of the models discussed. Includes simple physics-based equations for the fuel cell polarization curve Provides analytical solutions for fuel cell impedance Includes simple equations for calculation of temperature shapes in fuel cells Introduces physical descriptions of the basic transport and kinetic phenomena in fuel cells of various types

Fuel Cell Science and Engineering 2 Volume Set

Fuel Cell Science and Engineering  2 Volume Set
Author: Detlef Stolten,Bernd Emonts
Publsiher: John Wiley & Sons
Total Pages: 1268
Release: 2012-10-22
Genre: Science
ISBN: 9783527650262

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Fuel cells are expected to play a major role in the future power supply that will transform to renewable, decentralized and fluctuating primary energies. At the same time the share of electric power will continually increase at the expense of thermal and mechanical energy not just in transportation, but also in households. Hydrogen as a perfect fuel for fuel cells and an outstanding and efficient means of bulk storage for renewable energy will spearhead this development together with fuel cells. Moreover, small fuel cells hold great potential for portable devices such as gadgets and medical applications such as pacemakers. This handbook will explore specific fuel cells within and beyond the mainstream development and focuses on materials and production processes for both SOFC and lowtemperature fuel cells, analytics and diagnostics for fuel cells, modeling and simulation as well as balance of plant design and components. As fuel cells are getting increasingly sophisticated and industrially developed the issues of quality assurance and methodology of development are included in this handbook. The contributions to this book come from an international panel of experts from academia, industry, institutions and government. This handbook is oriented toward people looking for detailed information on specific fuel cell types, their materials, production processes, modeling and analytics. Overview information on the contrary on mainstream fuel cells and applications are provided in the book 'Hydrogen and Fuel Cells', published in 2010.

Proton Exchange Membrane Fuel Cells Modeling

Proton Exchange Membrane Fuel Cells Modeling
Author: Fengge Gao,Benjamin Blunier,Abdellatif Miraoui
Publsiher: John Wiley & Sons
Total Pages: 239
Release: 2013-02-07
Genre: Technology & Engineering
ISBN: 9781118566374

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The fuel cell is a potential candidate for energy storage andconversion in our future energy mix. It is able to directly convertthe chemical energy stored in fuel (e.g. hydrogen) intoelectricity, without undergoing different intermediary conversionsteps. In the field of mobile and stationary applications, it isconsidered to be one of the future energy solutions. Among the different fuel cell types, the proton exchange membrane(PEM) fuel cell has shown great potential in mobile applications,due to its low operating temperature, solid-state electrolyte andcompactness. This book presents a detailed state of art of PEM fuel cellmodeling, with very detailed physical phenomena equations indifferent physical domains. Examples and a fully coupledmulti-physical 1.2 kW PEMFC model are given help the reader betterunderstand how to use the equations.

Analytical Models for PEM Fuel Cell Impedance

Analytical Models for PEM Fuel Cell Impedance
Author: Andrei Kulikovsky
Publsiher: Unknown
Total Pages: 165
Release: 2017-06-10
Genre: Electronic Book
ISBN: 152147074X

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The book reports recently developed analytical physics-based models for impedance of a polymer electrolyte membrane fuel cell. Chapter 1 discusses the transient macro-homogeneous model for the cathode catalyst layer. This model forms a basis for all impedance models discussed in this book. Chapter 2 reports solvable analytical impedance models. These models are very fast; the respective numerical algorithms for fitting impedance spectra yield the result in just several minutes on a standard PC. However, the assumptions behind the model equations limit their validity by the cell current density of about a hundred mA cm^{-2}. Chapter 3 presents a more general numerical model valid for the cell currents up to 1 A cm2. However, the fitting algorithm based on this model is rather slow; typical variant takes from one to ten hours on a standard PC. A much faster algorithm can be constructed based on approximate analytical expression for the high--current cell impedance, which concludes this Chapter. The book could be useful to fuel cell developers, researchers and students in the field of fuel cell science. Maple worksheets with codes from this book for fitting experimental impedance spectra can be downloaded from https://github.com/akulikovsky/Fitting_Procs/issues/1

Anion Exchange Membrane Fuel Cells

Anion Exchange Membrane Fuel Cells
Author: Liang An,T.S. Zhao
Publsiher: Springer
Total Pages: 346
Release: 2018-03-21
Genre: Technology & Engineering
ISBN: 9783319713717

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This book provides a review of the latest advances in anion exchange membrane fuel cells. Starting with an introduction to the field, it then examines the chemistry and catalysis involved in this energy technology. It also includes an introduction to the mathematical modelling of these fuel cells before discussing the system design and performance of real-world systems. Anion exchange membrane fuel cells are an emerging energy technology that has the potential to overcome many of the obstacles of proton exchange membrane fuel cells in terms of the cost, stability, and durability of materials. The book is an essential reference resource for professionals, researchers, and policymakers around the globe working in academia, industry, and government.

Transient Numerical Modeling of Proton exchange membrane Fuel Cells

Transient Numerical Modeling of Proton exchange membrane Fuel Cells
Author: Aslan Kosakian
Publsiher: Unknown
Total Pages: 410
Release: 2021
Genre: Hydrogen as fuel
ISBN: OCLC:1314816009

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Hydrogen fuel cells convert the chemical energy of hydrogen directly into electricity, with the only byproducts being heat and water. The high cost of hydrogen fuel cells due to the expensive platinum catalyst is one of the limiting factors to their global commercialization. Improving fuel-cell performance while reducing the required amount of the catalyst can be achieved by optimizing the water balance in the cell that aims at striking a balance between electrolyte dry-out, which leads to high ohmic resistance, and liquid-water accumulation, which results in reactant starvation. Interpretation of the experimental measurements necessary for making design decisions is, however, often challenging due to the sub-millimeter scale of the fuel-cell components. Mathematical models have become a valuable instrument for gaining insight into the physical processes taking place in fuel cells. Because of the coupled electrochemical reactions, heat, mass, and charge transport that occur at multiple spatial and temporal scales, fuel-cell modeling is a complex task that is best addressed with the help of numerical simulations. As the common fuel-cell characterization experiments are dynamic in nature, their analysis requires transient models. In this thesis, an open-source transient numerical model of a hydrogen fuel cell is developed. The model is applied to interpret electrochemical impedance spectra of fuel cells, highlight the shortcomings of the analytical methods previously used for this purpose, and to better understand liquid-water dynamics in fuel cells. First, the transient model is used to analyze water-management signatures in fuel-cell impedance spectra under dry conditions. This work shows that the low-frequency inductive behavior observed experimentally in hydrogen fuel cells is influenced by the finite-rate water uptake by the electrolyte and water transport within the electrolyte, which impact the frequency and the size of the inductive loops in the spectra. An ohmic-resistance breakdown performed with the model shows that the high-frequency resistance extracted from the impedance spectra does not contain the protonic resistance of the carbon-supported catalyst layers (CLs) and, therefore, is not equivalent to the total ohmic resistance of the cell. Impedance spectroscopy is commonly used to measure the charge-transport properties of catalyst layers. Some of the analytical impedance expressions in the literature disagree in the equation that relates the conductivity and resistance of the uniform CLs. The numerical model developed in this thesis is used to inspect that disagreement and to examine the impact of the catalyst-layer nonuniformity on its impedance. Practical recommendations for the experimentalists as to which analytical model, and under what conditions, should be used to reliably characterize charge transport in CLs are provided. Finally, a novel transient two-phase fuel-cell model is developed that incorporates a pore-size-distribution sub-model to establish relationships between the microstructure of the porous fuel-cell components, their liquid- and gas-transport properties, and, ultimately, liquid-water flooding. Those relationships allow for the systematic analysis of the impact of the electrode design on the dynamic fuel-cell performance under the operating conditions that help keep the electrolyte hydrated but favor liquid-water production. For instance, the model captures how the liquid-water accumulation and drainage cycles translate into unstable fuel-cell performance. The developed transient fuel-cell model will serve as the foundation for more advanced studies in the future, such as the simulations of membrane and catalyst degradation, carbon corrosion, and cold start-up. The open-source design of the developed software makes it an attractive option for the fuel-cell modeling community.

Polymer Electrolyte Fuel Cells

Polymer Electrolyte Fuel Cells
Author: Michael Eikerling,Andrei Kulikovsky
Publsiher: CRC Press
Total Pages: 582
Release: 2014-09-23
Genre: Science
ISBN: 9781439854068

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The book provides a systematic and profound account of scientific challenges in fuel cell research. The introductory chapters bring readers up to date on the urgency and implications of the global energy challenge, the prospects of electrochemical energy conversion technologies, and the thermodynamic and electrochemical principles underlying the operation of polymer electrolyte fuel cells. The book then presents the scientific challenges in fuel cell research as a systematic account of distinct components, length scales, physicochemical processes, and scientific disciplines. The main part of the book focuses on theory and modeling. Theoretical tools and approaches, applied to fuel cell research, are presented in a self-contained manner. Chapters are arranged by different fuel cell materials and components, and sections advance through the hierarchy of scales, starting from molecular-level processes in proton-conducting media or electrocatalytic systems and ending with performance issues at the device level, including electrochemical performance, water management, durability, and analysis of failure mechanisms. Throughout, the book gives numerous examples of formidable scientific challenges as well as of tools to facilitate materials design and development of diagnostic methods. It reveals reserves for performance improvements and uncovers misapprehensions in scientific understanding that have misled or may continue to mislead technological development. An indispensable resource for scientifically minded and practically oriented researchers, this book helps industry leaders to appreciate the contributions of fundamental research, and leaders of fundamental research to appreciate the needs of industry.

Direct Alcohol Fuel Cells for Portable Applications

Direct Alcohol Fuel Cells for Portable Applications
Author: Alexandra M. F. R. Pinto,Vania Sofia Oliveira,Daniela Sofia Castro Falcao
Publsiher: Academic Press
Total Pages: 353
Release: 2018-09-08
Genre: Technology & Engineering
ISBN: 9780128118986

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Direct Alcohol Fuel Cells for Portable Applications: Fundamentals, Engineering and Advances presents the fundamental concepts, technological advances and challenges in developing, modeling and deploying fuel cells and fuel cell systems for portable devices, including micro and mini fuel cells. The authors review the fundamental science of direct alcohol fuel cells, covering, in detail, thermodynamics, electrode kinetics and electrocatalysis of charge-transfer reactions, mass and heat transfer phenomena, and basic modeling aspects. In addition, the book examines other fuels in DAFCs, such as formic acid, ethylene glycol and glycerol, along with technological aspects and applications, including case studies and cost analysis. Researchers, engineering professionals, fuel cell developers, policymakers and senior graduate students will find this a valuable resource. The book’s comprehensive coverage of fundamentals is especially useful for graduate students, advanced undergraduate students and those new to the field. Provides a comprehensive understanding of the fundamentals of DAFCs and their basic components, design and performance Presents current and complete information on the state-of-the-art of DAFC technology and its most relevant challenges for commercial deployment Includes practical application examples, problems and case studies Covers the use of other fuels, such as formic acid, ethylene glycol and glycerol

Solid Oxide Fuel Cells 12 SOFC XII

Solid Oxide Fuel Cells 12  SOFC XII
Author: S. C. Singhal,K. Eguchi
Publsiher: The Electrochemical Society
Total Pages: 3020
Release: 2011-04-25
Genre: Electronic Book
ISBN: 9781566778626

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This issue of ECS Transactions contains papers from the Twelfth International Symposium on Solid Oxide Fuel Cells (SOFC-XII),a continuing biennial series of symposia. The papers deal with materials for cell components and fabrication methods for components and complete cells. Also contained are papers on cell electrochemical performance and its modelling, stacks and systems, and prototype testing of SOFC demonstration units for different applications.

Water and Thermal Management of Proton Exchange Membrane Fuel Cells

Water and Thermal Management of Proton Exchange Membrane Fuel Cells
Author: Kui Jiao,Bowen Wang,Qing Du,Yun Wang,Guobin Zhang,Zirong Yang,Hao Deng,Xu Xie
Publsiher: Elsevier
Total Pages: 400
Release: 2021-06-05
Genre: Science
ISBN: 9780323911177

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Water and Thermal Management of Proton Exchange Membrane Fuel Cells introduces the main research methods and latest advances in the water and thermal management of PEMFCs. The book introduces the transport mechanism of each component, including modeling methods at different scales, along with practical exercises. Topics include PEMFC fundamentals, working principles and transport mechanisms, characterization tests and diagnostic analysis, the simulation of multiphase transport and electrode kinetics, cell-scale modeling, stack-scale modeling, and system-scale modeling. This volume offers a practical handbook for researchers, students and engineers in the fields of proton exchange membrane fuel cells. Proton exchange membrane fuel cells (PEMFCs) are high-efficiency and low-emission electrochemical energy conversion devices. Inside the PEMFC complex, physical and chemical processes take place, such as electrochemical reaction, multiphase flow and heat transfer. This book explores these topics, and more. Introduces the transport mechanism for each component of PEMFCs Presents modeling methods at different scales, including component, cell, stack and system scales Provides exercises in PEMFC modeling, along with examples of necessary codes Covers the latest advances in PEMFCs in a convenient and structured manner Offers a solution to researchers, students and engineers working on proton exchange membrane fuel cells

Polymer Electrolyte Fuel Cells

Polymer Electrolyte Fuel Cells
Author: Alejandro A. Franco
Publsiher: CRC Press
Total Pages: 616
Release: 2016-04-19
Genre: Science
ISBN: 9789814364409

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This book focuses on the recent research progress on the fundamental understanding of the materials degradation phenomena in PEFC, for automotive applications. On a multidisciplinary basis, through contributions of internationally recognized researchers in the field, this book provides a complete critical review on crucial scientific topics related to PEFC materials degradation, and ensures a strong balance between experimental and theoretical analysis and preparation techniques with several practical applications for both the research and the industrial communities.

Direct Methanol Fuel Cell Technology

Direct Methanol Fuel Cell Technology
Author: Kingshuk Dutta
Publsiher: Elsevier
Total Pages: 564
Release: 2020-02-25
Genre: Technology & Engineering
ISBN: 9780128191590

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Direct Methanol Fuel Cell Technology presents the overall progress witnessed in the field of DMFC over the past decade, highlighting the components, materials, functions, properties and features, designs and configurations, operations, modelling, applications, pros and cons, social, political and market penetration, economics and future directions. The book discusses every single aspect of DMFC device technology, the associated advantages and drawbacks of state-of-the-art materials and design, market opportunities and commercialization aspects, and possible future directions of research and development. This book, containing critical analyses and opinions from experts around the world, will garner considerable interest among actual users/scientists/experts. Analyzes developments of membrane electrolytes, electrodes, catalysts, catalyst supports, bipolar plates, gas diffusion layers and flow channels as critical components of direct methanol fuel cells Includes modeling of direct methanol fuel cells to understand their scaling up potentials Discusses commercial aspects of direct methanol fuel cells in terms of market penetration, end application, cost, viability, reliability, social and commercial perception, drawbacks and prospects

IEK 3 Report 2011 Climate Relevant Energy Research

IEK 3 Report 2011   Climate Relevant Energy Research
Author: Anonim
Publsiher: Forschungszentrum Jülich
Total Pages: 238
Release: 2012
Genre: Electronic Book
ISBN: 9783893368099

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