Experimental Functional Map of a Polymer Electrolyte Fuel Cell
Nova Science Publishers Inc (Verlag)
978-1-60456-560-7 (ISBN)
Fuel cell performance is determined by the complex interplay of mass transport, energy transfer and electrochemical processes. The convolution of these processes leads to spatial heterogeneity in the way that fuel cells perform, particularly due to reactant consumption, water management and the design of fluid-flow plates. It is therefore unlikely that any bulk measurement made on a fuel cell will represent performance at all parts of the cell. The ability to make spatially resolved measurements in a fuel cell provides one of the most useful ways in which to monitor and optimise performance. This book reviews the range of in situ techniques being used to study fuel cells and describes the use of novel experimental techniques that the authors have used to develop an experimental functional map of polymer electrolyte fuel cell (PEFC) performance. These techniques include the mapping of current density, electrochemical impedance, electrolyte conductivity, contact resistance and CO poisoning distribution within working PEFCs, as well as mapping the flow of reactant in gas channels using laser Doppler anemometry (LDA). The combination of these techniques, applied across a range of fuel cell operating conditions allows a unique picture of the internal workings of PEFCs to be obtained and has been used to validate both numerical and analytical models.
Preface; Introduction; Review of in Situ Methods of Analysing Fuel Cells; Electrical Techniques; Contact Resistance; Current Mapping; Localised Impedance Measurements; Non-electrical Techniques; Neutron Imaging; Spectroscopic Techniques; Species Distribution Mapping; Optical Techniques; Temperature Mapping; Experimental Methodology; Experimental Details; General Features; Contact Resistance Mapping; CO Distribution Measurements; Localised Impedance and Membrane Resistance Mapping; Channel Flow Mapping; The Experimental Functional Map; Contact Resistance Distribution; Current Distribution; Current Degradation due to Reactant Starvation along a Flow Channel; Current Distribution Transients; Effect of Flow-Plate Channel Width on Fuel Cell Performance; Localised Impedance Spectroscopy; Electrolyte Resistance Distribution; Carbon Monoxide Poisoning Distribution; Channel Flow Mapping; Laser Doppler Anemometry; LDA Results; Flow Parallel to the MEA Surface; Flow Normal to MEA Surface; Channel Flow Mapping Summary; Conclusion; Acknowledgements; References; Index.
Zusatzinfo | Illustrations, unspecified |
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Verlagsort | New York |
Sprache | englisch |
Maße | 230 x 155 mm |
Gewicht | 174 g |
Themenwelt | Technik ► Elektrotechnik / Energietechnik |
ISBN-10 | 1-60456-560-8 / 1604565608 |
ISBN-13 | 978-1-60456-560-7 / 9781604565607 |
Zustand | Neuware |
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