Journal of Fuel Cell Science and Technology: Recent submissions
Now showing items 741-760 of 854
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In Situ Optical Diagnostics for Measurements of Water Vapor Partial Pressure in a PEM Fuel Cell
(The American Society of Mechanical Engineers (ASME), 2006)A fiber optic coupled diode laser sensor has been constructed for in situ measurements of water vapor partial pressure in active proton-exchange membrane (PEM) fuel cell systems. The bipolar ... -
To Achieve the Best Performance Through Optimization of Gas Delivery and Current Collection in Solid Oxide Fuel Cells
(The American Society of Mechanical Engineers (ASME), 2006)Aimed at improving the maximum available power density in a planar-type solid oxide fuel cell, an analytical model is proposed in this work to find the optimum size of a current collector ... -
Fuel Cell Hybrids, Their Thermodynamics and Sustainable Development
(The American Society of Mechanical Engineers (ASME), 2006)The increasing demand on primary energy and the increasing concern on climatic change demand immediately a sustainable development, but still there remain open questions regarding its technical ... -
The Thermodynamic Evaluation and Optimization of Fuel Cell Systems
(The American Society of Mechanical Engineers (ASME), 2006)Energy conversion today is subject to high thermodynamic losses. About 50% to 90% of the exergy of primary fuels is lost during conversion into power or heat. The fast increasing world energy ... -
Hydrogen Production From Methane by Using Oxygen Permeable Ceramics
(The American Society of Mechanical Engineers (ASME), 2006)Oxygen permeable ceramics based on mixed conductors are attracting much attention for use in partial oxidation of hydrocarbons as a novel technique for syngas and pure hydrogen production. This ... -
Entropy Based Design of Fuel Cells
(The American Society of Mechanical Engineers (ASME), 2006)This article aims to develop an entropy based method of systematically improving efficiency of fuel cells. Entropy production of both electrochemical and thermofluid irreversibilities is formulated ... -
Lattice Boltzmann Simulations of CO2 Bubble Dynamics at the Anode of a μDMFC
(The American Society of Mechanical Engineers (ASME), 2006)This paper presents the bubble transport phenomenon at the anode of a micro-direct methanol fuel cell (μDMFC) from a mesoscopic viewpoint. Carbon dioxide bubbles generated at the anode may block ... -
Dynamic Simulation of an Integrated Solid Oxide Fuel Cell System Including Current-Based Fuel Flow Control
(The American Society of Mechanical Engineers (ASME), 2006)A two-dimensional dynamic model was created for a Siemens Westinghouse type tubular solid oxide fuel cell (SOFC). This SOFC model was integrated with simulation modules for other system components ... -
Development of High Performance Micro DMFCS and a DMFC Stack
(The American Society of Mechanical Engineers (ASME), 2006)A silicon-based micro direct methanol fuel cell (μDMFC) for portable applications has been fabricated and its electrochemical characterization carried out. A membrane-electrode assembly (MEA) was ... -
A Thermodynamic Analysis of Electricity and Hydrogen Co-Production Using a Solid Oxide Fuel Cell
(The American Society of Mechanical Engineers (ASME), 2006)This paper presents the electricity and hydrogen co-production concept, a methodology for the study of SOFC hydrogen co-production, and simulation results that address the impact of reformer ... -
Preparation and Characterization of Pt/Superfine Mesocarbon Microbead Powers Electrocatalysts
(The American Society of Mechanical Engineers (ASME), 2006)Superfine mesocarbon microbead powders (SFMCMBs) as the new supports for platinum electrocatalysts were first investigated. The Pt∕SFMCMB electrocatalysts were prepared by an impregnation-reduction ... -
Dynamic Test and Real-time Control Platform of Anode Recirculation for PEM Fuel Cell Systems
(The American Society of Mechanical Engineers (ASME), 2006)Anode recirculation is essential to the pure-hydrogen proton exchange membrane fuel cell system. Keeping the pressure difference between the anode and the cathode is also important to the membrane ... -
Physical-Chemical and Thermodynamic Analyses of Ethanol Steam Reforming for Hydrogen Production
(The American Society of Mechanical Engineers (ASME), 2006)Steam reforming is the most usual method of hydrogen production due to its high production efficiency and technological maturity. The use of ethanol for this purpose is an interesting option ... -
Stresses in Proton Exchange Membranes Due to Hygro-Thermal Loading
(The American Society of Mechanical Engineers (ASME), 2006)Durability of the proton exchange membrane (PEM) is a major technical barrier to the commercial viability of polymer electrolyte membrane fuel cells (PEMFC) for stationary and transportation ... -
Heat Exchangers for Fuel Cell and Hybrid System Applications
(The American Society of Mechanical Engineers (ASME), 2006)The fuel cell system and fuel cell gas turbine hybrid system represent an emerging technology for power generation because of its higher energy conversion efficiency, extremely low environmental ... -
The Electrochemical Performance of Anode-Supported SOFCs with LSM-Type Cathodes Produced by Alternative Processing Routes
(The American Society of Mechanical Engineers (ASME), 2006)The electrochemical performance of La0.65Sr0.3MnO3-type (LSM) anode-supported single cells, produced by alternative production processes, has been investigated at intermediate temperatures. In particular, ... -
MEAs for Polymer Electrolyte Fuel Cell (PEFC) Working at Medium Temperature
(The American Society of Mechanical Engineers (ASME), 2006)Recently, the CNR-ITAE activity has been addressed to the components development (electrodes and membranes) able to work in medium temperature PEFCs (80–130°C). One of the main problems to ... -
Analysis, Modeling, and Validation for the Thermal Dynamics of a Polymer Electrolyte Membrane Fuel Cell System
(The American Society of Mechanical Engineers (ASME), 2006)A control-oriented mathematical model of a polymer electrolyte membrane (PEM) fuel cell stack is developed and experimentally verified. The model predicts the bulk fuel cell transient temperature ... -
Analysis of Chemically Reacting Transport Phenomena in an Anode Duct of Intermediate Temperature SOFCs
(The American Society of Mechanical Engineers (ASME), 2006)The internal reforming and electrochemical reactions appear in the porous anode layer, and may lead to inhomogeneous temperature and gas species distributions according to the reaction kinetics. ... -
Diffusion and Chemical Reaction in the Porous Structures of Solid Oxide Fuel Cells
(The American Society of Mechanical Engineers (ASME), 2006)The Rolls-Royce integrated-planar solid oxide fuel cell (IP-SOFC) consists of ceramic modules with electrochemical cells printed on the outer surfaces. The cathodes are supplied with oxygen from ...