Dynamic Performance Modelling and Testing of a Polymer Electrolyte Membrane Fuel Cell
Author : Brett Holland
Publisher :
Page : 438 pages
File Size : 15,61 MB
Release : 2003
Category : Fuel cells
ISBN :
Proton Exchange Membrane Fuel Cells
Author : Alhussein Albarbar
Publisher : Springer
Page : 172 pages
File Size : 34,22 MB
Release : 2017-11-17
Category : Technology & Engineering
ISBN : 3319707272
Book Description
This book examines the characteristics of Proton Exchange Membrane (PEM) Fuel Cells with a focus on deriving realistic finite element models. The book also explains in detail how to set up measuring systems, data analysis, and PEM Fuel Cells’ static and dynamic characteristics. Covered in detail are design and operation principles such as polarization phenomenon, thermodynamic analysis, and overall voltage; failure modes and mechanisms such as permanent faults, membrane degradation, and water management; and modelling and numerical simulation including semi-empirical, one-dimensional, two-dimensional, and three-dimensional models. It is appropriate for graduate students, researchers, and engineers who work with the design and reliability of hydrogen fuel cells, in particular proton exchange membrane fuel cells.
Dynamic Modeling and Experimental Evaluation of a High Temperature Polymer Electrolyte Membrane Fuel Cell System
Author : Gia Luong Huu Nguyen
Publisher :
Page : 121 pages
File Size : 27,8 MB
Release : 2013
Category :
ISBN : 9781303306440
Book Description
Since 1990, the power generation market has shifted from large, centralized power plants to small, distributed engines to produce power near the point of consumption. The fuel cell is a prominent candidate for the small, distributed engines, despite the current barriers of reliability and cost. This research project evaluates the performance of a high temperature polymer electrolyte membrane fuel cell system. This thesis presents the dynamic model of a fuel cell system featuring a thermally integrated fuel processor, a fuel cell stack with cathode recirculation, and a heat recovery unit. Each component was calibrated with a steady-state model and then connected to form a system. Parallel with developing the dynamic model, engineers installed and operated three fuel cell prototypes. To verify the model, this study compared the results from the dynamic model to the experimental data in two scenarios: a power sweep from 1.7 to 3.5 kW, and a change in burner from 7.5 to 15 kW. After the verification, this study then used the model to investigate the control of ATR temperature. Through these analyses, the project's objectives are to: *Gain confidence the model accurately simulates the steady state and dynamic response of the integrated fuel cell system, and *Use the dynamic model to test the control of ATR temperature. This research found that the thermally integrated fuel processor together with the cathode recirculation could create a rise in the fuel processor temperature during rapid power increase. To stabilize the temperature, controlling the amount of air entering the cathode is necessary. This could necessitate the development of additional sensors and control methods for these integrated fuel cell systems in the future.
High temperature polymer electrolyte membrane fuel cells
Author : Christian Siegel
Publisher : Logos Verlag Berlin GmbH
Page : 182 pages
File Size : 34,8 MB
Release : 2015-03-20
Category : Science
ISBN : 3832539174
Book Description
A three-dimensional computational fluid dynamics model of a high temperature polymer electrolyte membrane fuel cell, employing a high temperature stable polybenzimidazole membrane electrode assembly doped with phosphoric acid, was developed and implemented using a commercially available finite element software. Three types of flow-fields were modeled and simulated. Selected simulation results at reference operating conditions were compared to the performance curves and to segmented solid-phase temperature and current density measurements. For the segmented measurements, an inhouse developed prototype cell was designed and manufactured. The segmented cell was successfully operated and the solid-phase temperature and the current density distribution were recorded, evaluated, and discussed. Sequentially scanned segmented electrochemical impedance spectroscopy measurements were performed to qualitatively support the observed trends. These measurements were used to identify and determine the causes of the inhomogeneous current density distributions. An equivalent circuit model was developed, the obtained spectra were analyzed, and the model parameters discussed. This work helps to provide a better understanding of the internal behaviour of a running high temperature polymer electrolyte membrane fuel cell and presents valuable data for modeling and simulation. For large fuel cells and complete fuel cell stacks in particular, well designed anode and cathode inlet and outlet sections are expected to aid in achieving flatter quantities distributions and in preventing hot spots over the membrane electrode assembly area, and to develop proper start-up, shut-down, and tempering concepts.
Modeling and Diagnostics of Polymer Electrolyte Fuel Cells
Author : Ugur Pasaogullari
Publisher : Springer Science & Business Media
Page : 412 pages
File Size : 28,5 MB
Release : 2010-07-23
Category : Science
ISBN : 0387980687
Book Description
This volume, presented by leading experts in the field, covers the latest advances in diagnostics and modeling of polymer electrolyte fuel cells, from understanding catalyst layer durability to start-up under freezing conditions.
Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology
Author : Christoph Hartnig
Publisher : Elsevier
Page : 437 pages
File Size : 12,80 MB
Release : 2012-03-19
Category : Technology & Engineering
ISBN : 0857095471
Book Description
Polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs) technology are promising forms of low-temperature electrochemical power conversion technologies that operate on hydrogen and methanol respectively. Featuring high electrical efficiency and low operational emissions, they have attracted intense worldwide commercialization research and development efforts. These R&D efforts include a major drive towards improving materials performance, fuel cell operation and durability. In situ characterization is essential to improving performance and extending operational lifetime through providing information necessary to understand how fuel cell materials perform under operational loads.This two volume set reviews the fundamentals, performance, and in situ characterization of PEMFCs and DMFCs. Volume 1 covers the fundamental science and engineering of these low temperature fuel cells, focusing on understanding and improving performance and operation. Part one reviews systems fundamentals, ranging from fuels and fuel processing, to the development of membrane and catalyst materials and technology, and gas diffusion media and flowfields, as well as life cycle aspects and modelling approaches. Part two details performance issues relevant to fuel cell operation and durability, such as catalyst ageing, materials degradation and durability testing, and goes on to review advanced transport simulation approaches, degradation modelling and experimental monitoring techniques.With its international team of expert contributors, Polymer electrolyte membrane and direct methanol fuel cell technology Volumes 1 & 2 is an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. Covers the fundamental science and engineering of polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs), focusing on understanding and improving performance and operation Reviews systems fundamentals, ranging from fuels and fuel processing, to the development of membrane and catalyst materials and technology, and gas diffusion media and flowfields, as well as life cycle aspects and modelling approaches Details performance issues relevant to fuel cell operation and durability, such as catalyst ageing, materials degradation and durability testing, and reviews advanced transport simulation approaches, degradation modelling and experimental monitoring techniques
Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology
Author : Christoph Hartnig
Publisher : Elsevier
Page : 522 pages
File Size : 45,32 MB
Release : 2012-02-20
Category : Technology & Engineering
ISBN : 085709548X
Book Description
Polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs) technology are promising forms of low-temperature electrochemical power conversion technologies that operate on hydrogen and methanol respectively. Featuring high electrical efficiency and low operational emissions, they have attracted intense worldwide commercialization research and development efforts. These R&D efforts include a major drive towards improving materials performance, fuel cell operation and durability. In situ characterization is essential to improving performance and extending operational lifetime through providing information necessary to understand how fuel cell materials perform under operational loads. Polymer Electrolyte Membrane and Direct Methanol Fuel Cell Technology, Volume 2 details in situ characterization, including experimental and innovative techniques, used to understand fuel cell operational issues and materials performance. Part I reviews enhanced techniques for characterization of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry. Part II reviews characterization techniques for water and fuel management, including neutron radiography and tomography, magnetic resonance imaging and Raman spectroscopy. Finally, Part III focuses on locally resolved characterization methods, from transient techniques and electrochemical microscopy, to laser-optical methods and synchrotron radiography. With its international team of expert contributors, Polymer electrolyte membrane and direct methanol fuel cell technology will be an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. Polymer electrolyte membrane and direct methanol fuel cell technology is an invaluable reference for low temperature fuel cell designers and manufacturers, as well as materials science and electrochemistry researchers and academics. Details in situ characterisation of polymer electrolyte membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs), including the experimental and innovative techniques used to understand fuel cell operational issues and materials performance Examines enhanced techniques for characterisation of catalyst activities and processes, such as X-ray absorption and scattering, advanced microscopy and electrochemical mass spectrometry Reviews characterisation techniques for water and fuel management, including neutron radiography and tomography, and comprehensively covers locally resolved characterisation methods, from transient techniques to laser-optical methods
PEM Fuel Cells
Author : Jasna Jankovic
Publisher : Walter de Gruyter GmbH & Co KG
Page : 508 pages
File Size : 25,35 MB
Release : 2023-05-22
Category : Technology & Engineering
ISBN : 3110622726
Book Description
This book is a comprehensive introduction to the rapidly developing field of modeling and characterization of PEM fuel cells. It focuses on i) fuel cell performance modeling and performance characterization applicable from single cells to stacks, ii) fundamental and advanced techniques for structural and compositional characterization of fuel cell components and iii) electrocatalyst design. Written by experts in this field, this book is an invaluable tool for graduate students and professionals.
High Temperature Polymer Electrolyte Membrane Fuel Cells
Author : Qingfeng Li
Publisher : Springer
Page : 561 pages
File Size : 21,40 MB
Release : 2015-10-15
Category : Technology & Engineering
ISBN : 3319170821
Book Description
This book is a comprehensive review of high-temperature polymer electrolyte membrane fuel cells (PEMFCs). PEMFCs are the preferred fuel cells for a variety of applications such as automobiles, cogeneration of heat and power units, emergency power and portable electronics. The first 5 chapters of the book describe rationalization and illustration of approaches to high temperature PEM systems. Chapters 6 - 13 are devoted to fabrication, optimization and characterization of phosphoric acid-doped polybenzimidazole membranes, the very first electrolyte system that has demonstrated the concept of and motivated extensive research activity in the field. The last 11 chapters summarize the state-of-the-art of technological development of high temperature-PEMFCs based on acid doped PBI membranes including catalysts, electrodes, MEAs, bipolar plates, modelling, stacking, diagnostics and applications.
Dynamic Modeling and Analysis of Proton Exchange Membrane Fuel Cells for Control Design
Author : Alexander John Headley
Publisher :
Page : 290 pages
File Size : 19,52 MB
Release : 2016
Category :
ISBN :
Book Description
This dissertation seeks to address a number of issues facing the advancement of Proton Exchange Membrane (PEM) fuel cell technology by improving control-oriented modeling strategies for these systems. Real-time control is a major ongoing challenge for PEM fuel cell technologies, particularly with regards to water and temperature dynamics. This can lead to a number of operational concerns, such as membrane flooding and dehydration, which can seriously diminish the efficiency, reliability, and long term health of the system. To combat these issues, comprehensive models that are capable of capturing the dynamics of the key operating conditions and can be processed in real time are needed. Also, given the inherently distributed nature of the system, such a model would ideally account for the changes in the conditions from cell-to-cell in the stack, which can be very significant. With this goal in mind, the main focus of this dissertation is the development and experimental validation of control-oriented modeling techniques for PEM fuel cell stacks. The first major work in this study was the verification of a relative humidity model in response to varying loads. Through this work, a multiple control volume (CV) approach was developed and experimentally validated to model the distribution of operating conditions more accurately while keeping the computational expense sufficiently low. To optimize the modeling efforts, further analysis of the temperature and vapor distribution was performed starting from first principles. This led to the creation of various techniques to optimally size CVs based on the parameters and operating conditions of the system in question. Finally, it was noted throughout the testing that the performance of the membrane electrolyte assemblies in the test stack declined significantly from their initial state. To compensate for this, a Kalman filter was implemented to quantify the membrane degradation. SEM analysis of membranes from the test stack confirmed the validity of this technique. This work can be used to significantly improve real-time models for PEM fuel cells for model-based control applications.
