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Showing 1 to 20 of 62 for “"Proton Exchange Membrane Fuel Cell"”.
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Electrochemical impedance spectroscopy of proton exchange membrane fuel cell stacks
… Spectroscopy (EIS) is applied to a small, four cell Proton Exchange Membrane (PEM) fuel cell stack to examine the stack response as the load current changes. The measured stack response is compared to a simulated response generated by a stack model that has been developed using MATLAB. The …
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Electrochemical impedance spectroscopy options for proton exchange membrane fuel cell diagnostics
… (EIS) has been exploited as a rich source of Proton Exchange Membrane Fuel Cell (PEMFC) diagnostic information for many years. Several investigators have characterized different failure modes for PEMFCs using EIS and it now remains to determine how this information is to be obtained and used …
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A Microstructural Model for a Proton Exchange Membrane Fuel Cell Catalyst Layer
… a microstructural model of a catalyst layer in a proton exchange membrane (PEM) fuel cell. In this study, a stochastic model that uses individual carbon, platinum and ionomer particles as building blocks to construct a catalyst layer geometry, resulting in optimal porosity and material mass ratios …
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INTELLIGENT FAULT DETECTION AND ISOLATION FOR PROTON EXCHANGE MEMBRANE FUEL CELL SYSTEMS
… independent neural network is used to model the proton exchange membrane fuel cell nonlinear systems using a multi-input multi-output structure. This research proposed the use of radial basis function network and multilayer perceptron network to perform fault detection. After training, the neural …
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Experimental investigation of novel proton exchange membrane fuel cell and battery integrated system
In this thesis study, a PEM fuel cell and battery integrated system is developed. The performance assessments of the PEM fuel cell stack are performed through the polarization curve, energy efficiency, exergy efficiency, and open circuit voltage. Furthermore, the performance evaluation of the fuel …
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Water Management Diagnostics of a Proton Exchange Membrane Fuel Cell Using Magnetic Resonance Imaging
… water waves that do not exhaust from the fuel cell. These stuck waves increase the pressure drop within the fuel cell, as well as reducing its freeze resistance, catalyst stability, and stack stability.
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Development and validation of a computational model for a proton exchange membrane fuel cell
A steady-state computational model for a proton exchange membrane fuel cell (PEMFC) is presented. The model accounts for species transport, electrochemical kinetics, energy transport, current distribution, water uptake and release within the polymer portion of the catalyst layers, and liquid water …
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A Microscopic Continuum Model of a Proton Exchange Membrane Fuel Cell Electrode Catalyst Layer
… the cathode catalyst layer (active layer) of a proton exchange membrane fuel cell are developed and presented. This model incorporates O₂ species and ion transport while taking a discrete look at the platinum particles within the active layer. The original 2-dimensional axisymmetric Thin Film …
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Dynamic modeling and control of a proton exchange membrane fuel cell as a distributed generator
… concentrated on the modeling and control of a Proton Exchange Membrane (PEM) fuel cell in a deregulated electric power system. The PEM fuel cell is a Multiple Input Multiple Output (MIMO) system with various dynamic states. In most previous model studies, the stack temperature of a fuel cell …
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Dynamic modelling and emulation of a high temperature proton exchange membrane fuel cell (HT PEMFC)
Fuel cells (FC) are power sources that convert chemical energy into electrical and thermal energy in a clean and efficient manner. In the 21st century, fuel cells appear poised to meet the power demands of a variety of applications, ranging from portable electronics to utility power plants. …
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Dynamic Proton Exchange Membrane Fuel Cell System Synthesis/Design and Operation/Control Optimization under Uncertainty
Proton exchange membrane fuel cells (PEMFCs) are one of the leading candidates in alternative energy conversion devices for transportation, stationary, and portable power generation applications. PEMFC systems with their own fuel conversion unit typically consist of several subsystems: a fuel …
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Influence of electrode stress on proton exchange membrane fuel cell performance : experimental characterization and power optimization
… stress applied to the electrode area of a Proton Exchange Membrane (PEM) fuel cell is known to significantly affect power output. In practice, electrode stress arises during operation due to the clamping force that is necessary for sealing the cell. In traditional fuel cell designs, the …
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EFFECT OF MECHANICAL VIBRATION ON PLATINUM PARTICLE AGGLOMERATION AND GROWTH IN PROTON EXCHANGE MEMBRANE FUEL CELL CATALYST LAYER
… (Pt) particle agglomeration and growth in the membrane electrode assembly (MEA) of a proton exchange membrane fuel cell (PEM Fuel Cell). This study is of great importance, since many PEM fuel cells operate under a vibrating environment, such as the case of vehicular applications, and this may …
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Proton Exchange Membrane Fuel Cell Systems Based on Aromatic Hydrocarbon and Partially Fluorinated Disulfonated Poly(Arylene Ether) Copolymers
… describes the past and recent progress in proton exchange membranes (PEM) for fuel cells. In particular the synthesis and characterization of materials for advanced alternative PEM were studied with an emphasis on structure-property and structure-property-performance relationships. The …
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The effectivness of using a non-platinum material combination for the catalyst layer of a proton exchange membrane fuel cell
Submitted in the fulfilment of the requirements for the Master of Engineering, Durban University of Technology, Durban, South Africa, 2016.
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Renewable Electricity Generation via Solar-Powered Methanol Reforming: Hybrid Proton Exchange Membrane Fuel Cell Systems Based on Novel Non-Concentrating, Intermediate-Temperature Solar Collectors
… energy utilization with high efficiencies and excellent cost-effectiveness. The goal of this work was to design a non-concentrating collector capable of reaching temperatures above 250 °C, use this collector to power methanol steam reforming, and operate a proton exchange membrane (PEM) fuel cell …
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