Water Management In Pem Fuel Cell Gas Distributor Plates
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Water Management In Pem Fuel Cell Gas Distributor Plates
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Author : Masli Irwan Rosli
language : en
Publisher:
Release Date : 2011
Water Management In Pem Fuel Cell Gas Distributor Plates written by Masli Irwan Rosli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Water Management In Pem Fuel Cell Gass Distributor Plates
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Author : Masli Irwan Rosli
language : en
Publisher:
Release Date : 2011
Water Management In Pem Fuel Cell Gass Distributor Plates written by Masli Irwan Rosli and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Proton exchange membrane fuel cells are well known to be prormsmg alternative energy converters because of their advantages in power efficiency and low emission. One of the major components in a proton exchange membrane fuel cell is the gas flow-field channels where the reactant gases are distributed to the catalyst layers and the liquid water is accumulated. In this investigation, a fuel cell test station was designed and fabricated in order to perform experimental investigations on the proton exchange membrane fuel cell. Direct visualisation techniques have been applied in the experimental investigations in order to capture visuals of the liquid water behaviour in the gas flow-field channels. The visuals were captured by using a transparent proton exchange membrane fuel cell which has been specifically designed for this investigation. The power performance of the transparent proton exchange membrane fuel cell has been evaluated at the various cathode gas inlet relative humidity's and gas inlet flow rates. Both 2D and 3D proton exchange membrane fuel cell models have been developed in this investigation in order to simulate the power performance of the proton exchange membrane fuel cell and to predict water profiles in the gas flow- field channels. The operating conditions for the experimental investigations and the produced data, namely the power performance curves and the visuals of the liquid water distributions in the gas flow-field channels have been used in order to set up the models and also to validate the simulation results. Observations on the visualisation experimental investigations on the transparent proton exchange membrane fuel cell have revealed some very interesting liquid water behaviours, namely the cyclic formation of the liquid water and the positive effect of the water slug movements in the gas flow-field channels. The gas inlet relative humidity was observed to significantly affect to this liquid water behaviour. In addition, the cathode gas inlet relative humidity was observed to produce a larger effect compared to the anode gas inlet relative humidity o~ the power performance , of the proton exchange membrane fuel cell. The developed 2D model was tested and it was found to be capable of producing good results in the prediction of the power performance of the proton v exchange membrane fuel cell. However, the 3D model was found to perform better, u, in particular the relative humidity profiles over the whole region of the gas flow- field channels. This provides further information on the formation of the liquid water in the gas flow-field channels and this can be evaluated in the water management of the proton exchange membrane fuel cell.
Pem Fuel Cells
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Author : Frano Barbir
language : en
Publisher: Academic Press
Release Date : 2012-09-25
Pem Fuel Cells written by Frano Barbir and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-25 with Science categories.
Demand for fuel cell technology is growing rapidly. Fuel cells are being commercialized to provide power to buildings like hospitals and schools, to replace batteries in portable electronic devices, and as replacements for internal combustion engines in vehicles. PEM (Proton Exchange Membrane) fuel cells are lighter, smaller, and more efficient than other types of fuel cell. As a result, over 80% of fuel cells being produced today are PEM cells. This new edition of Dr. Barbir's groundbreaking book still lays the groundwork for engineers, technicians and students better than any other resource, covering fundamentals of design, electrochemistry, heat and mass transport, as well as providing the context of system design and applications. Yet it now also provides invaluable information on the latest advances in modeling, diagnostics, materials, and components, along with an updated chapter on the evolving applications areas wherein PEM cells are being deployed. Comprehensive guide covers all aspects of PEM fuel cells, from theory and fundamentals to practical applications Provides solutions to heat and water management problems engineers must face when designing and implementing PEM fuel cells in systems Hundreds of original illustrations, real-life engineering examples, and end-of-chapter problems help clarify, contextualize, and aid understanding
Pem Fuel Cell Diagnostic Tools
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Author : Haijiang Wang
language : en
Publisher: CRC Press
Release Date : 2011-08-25
Pem Fuel Cell Diagnostic Tools written by Haijiang Wang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-08-25 with Science categories.
PEM Fuel Cell Diagnostic Tools presents various tools for diagnosing PEM fuel cells and stacks, including in situ and ex situ diagnostic tools, electrochemical techniques, and physical/chemical methods. The text outlines the principles, experimental implementation, data processing, and application of each technique, along with its capabilities and weaknesses. The book covers many diagnostics employed in the characterization and determination of fuel cell performance. It discusses commonly used conventional tools, such as cyclic voltammetry, electrochemical impedance spectroscopy, scanning electron microscopy, and transmission electron microscopy. It also examines special tools developed specifically for PEM fuel cells, including transparent cells, cathode discharge, and current mapping, as well as recent advanced tools for diagnosis, such as magnetic resonance imaging and atomic force microscopy. For clarity, the book splits these diagnostic methodologies into two parts—in situ and ex situ. To better understand the tools, PEM fuel cell testing is also discussed. Each self-contained chapter provides cross-references to other chapters. Written by international scientists active in PEM fuel cell research, this volume incorporates state-of-the-art technical advances in PEM fuel cell diagnosis. The diagnostic tools presented help readers to understand the physical and chemical phenomena involved in PEM fuel cells.
Pem Fuel Cells
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Author : Gurbinder Kaur
language : en
Publisher: Elsevier
Release Date : 2021-11-16
Pem Fuel Cells written by Gurbinder Kaur and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-16 with Science categories.
PEM Fuel Cells: Fundamentals, Advanced Technologies, and Practical Application provides a comprehensive introduction to the principles of PEM fuel cell, their working condition and application, and the latest breakthroughs and challenges for fuel cell technology. Each chapter follows a systematic and consistent structure with clear illustrations and diagrams for easy understanding. The opening chapters address the basics of PEM technology; stacking and membrane electrode assembly for PEM, degradation mechanisms of electrocatalysts, platinum dissolution and redeposition, carbon-support corrosion, bipolar plates and carbon nanotubes for the PEM, and gas diffusion layers. Thermodynamics, operating conditions, and electrochemistry address fuel cell efficiency and the fundamental workings of the PEM. Instruments and techniques for testing and diagnosis are then presented alongside practical tests. Dedicated chapters explain how to use MATLAB and COMSOL to conduct simulation and modeling of catalysts, gas diffusion layers, assembly, and membrane. Degradation and failure modes are discussed in detail, providing strategies and protocols for mitigation. High-temperature PEMs are also examined, as are the fundamentals of EIS. Critically, the environmental impact and life cycle of the production and storage of hydrogen are addressed, as are the risk and durability issues of PEMFC technology. Dedicated chapters are presented on the economics and commercialization of PEMFCs, including discussion of installation costs, initial capital costs, and the regulatory frameworks; apart from this, there is a separate chapter on their application to the automotive industry. Finally, future challenges and applications are considered. PEM Fuel Cells: Fundamentals, Advanced Technologies, and Practical Application provides an in-depth and comprehensive reference on every aspect of PEM fuel cells fundamentals, ideal for researchers, graduates, and students. Presents the fundamentals of PEM fuel cell technology, electrolytes, membranes, modeling, conductivity, recent trends, and future applications Addresses commercialization, public policy, and the environmental impacts of PEMFC in dedicated chapters Presents state-of-the-art PEMFC research alongside the underlying concepts
Recent Advances In High Temperature Pem Fuel Cells
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Author : Sivakumar Pasupathi
language : en
Publisher: Academic Press
Release Date : 2016-09-13
Recent Advances In High Temperature Pem Fuel Cells written by Sivakumar Pasupathi and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-13 with Technology & Engineering categories.
Hydrogen and Fuel Cells Primers is a series focused on Energy applications. Its concise volumes present those coming into this broad and multidisciplinary field with the most recent advances in each of its particular topics. They bring together information that has thus far been scattered in many different sources under one single title, which makes them a useful reference for industry professionals, researchers and graduate students, especially those starting in a new topic of research. This volume, Recent Advances in High Temperature PEM Fuel Cells, provides an up-to-date progress of High Temperature Polymer Electrolyte Membrane Fuel Cells (HTPEMFCs), including three critical subjects for this type of fuel cells: Membrane Electrode Assembly (MEA) development, stack development and systems development. The MEA and stack development sections cover the recent advances in this area and highlight the areas in most need of improvement. The systems development section focuses on stationary systems, mainly Combined Heat and Power (CHP), based on HTPEMFCs. Finally the conclusions summarize the recent advances of HTPEMFCs in all these areas and provide some insights for future developments. Prof. Bruno G. Pollet, Series Editor Presents the most current knowledge in membrane electrode assembly, stack, and systems development for HTPEMFCs Highlights the areas that need improvement in electrode assembly and stack development Examines stationary high temperature PEMFC systems, including CHP
Pem Fuel Cell Durability Handbook Two Volume Set
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Author : Haijiang Wang
language : en
Publisher: CRC Press
Release Date : 2019-08-21
Pem Fuel Cell Durability Handbook Two Volume Set written by Haijiang Wang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-21 with Science categories.
While PEM fuel cells are highly efficient, environmentally friendly sources of power, their durability hinders the commercialization of this technology. With contributions from international scientists active in PEM fuel cell research, PEM Fuel Cell Durability Handbook, Two-Volume Set provides a comprehensive source of state-of-the-art research in
Polymer Electrolyte Fuel Cell Durability
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Author : Felix N. Büchi
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-02-08
Polymer Electrolyte Fuel Cell Durability written by Felix N. Büchi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-02-08 with Science categories.
This book covers a significant number of R&D projects, performed mostly after 2000, devoted to the understanding and prevention of performance degradation processes in polymer electrolyte fuel cells (PEFCs). The extent and severity of performance degradation processes in PEFCs were recognized rather gradually. Indeed, the recognition overlapped with a significant number of industrial dem- strations of fuel cell powered vehicles, which would suggest a degree of technology maturity beyond the resaolution of fundamental failure mechanisms. An intriguing question, therefore, is why has there been this apparent delay in addressing fun- mental performance stability requirements. The apparent answer is that testing of the power system under fully realistic operation conditions was one prerequisite for revealing the nature and extent of some key modes of PEFC stack failure. Such modes of failure were not exposed to a similar degree, or not at all, in earlier tests of PEFC stacks which were not performed under fully relevant conditions, parti- larly such tests which did not include multiple on–off and/or high power–low power cycles typical for transportation and mobile power applications of PEFCs. Long-term testing of PEFCs reported in the early 1990s by both Los Alamos National Laboratory and Ballard Power was performed under conditions of c- stant cell voltage, typically near the maximum power point of the PEFC.
Pem Fuel Cell Electrocatalysts And Catalyst Layers
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Author : Jiujun Zhang
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-08-26
Pem Fuel Cell Electrocatalysts And Catalyst Layers written by Jiujun Zhang and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-08-26 with Technology & Engineering categories.
Proton exchange membrane (PEM) fuel cells are promising clean energy converting devices with high efficiency and low to zero emissions. Such power sources can be used in transportation, stationary, portable and micro power applications. The key components of these fuel cells are catalysts and catalyst layers. “PEM Fuel Cell Electrocatalysts and Catalyst Layers” provides a comprehensive, in-depth survey of the field, presented by internationally renowned fuel cell scientists. The opening chapters introduce the fundamentals of electrochemical theory and fuel cell catalysis. Later chapters investigate the synthesis, characterization, and activity validation of PEM fuel cell catalysts. Further chapters describe in detail the integration of the electrocatalyst/catalyst layers into the fuel cell, and their performance validation. Researchers and engineers in the fuel cell industry will find this book a valuable resource, as will students of electrochemical engineering and catalyst synthesis.
Energy Efficient Technologies For The Dismounted Soldier
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 1998-01-30
Energy Efficient Technologies For The Dismounted Soldier written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-01-30 with Technology & Engineering categories.
This book documents electric power requirements for the dismounted soldier on future Army battlefields, describes advanced energy concepts, and provides an integrated assessment of technologies likely to affect limitations and needs in the future. It surveys technologies associated with both supply and demand including: energy sources and systems; low power electronics and design; communications, computers, displays, and sensors; and networks, protocols, and operations. Advanced concepts discussed are predicated on continued development by the Army of soldier systems similar to the Land Warrior system on which the committee bases its projections on energy use. Finally, the volume proposes twenty research objectives to achieve energy goals in the 2025 time frame.
