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Aqui você encontrará apresentações realizadas nas Conferências de Usuários COMSOL de todo o mundo. As apresentações englobam pesquisas e produtos inovadores feitas por engenheiros e cientistas usando o COMSOL Multiphysics. Os tópicos abramgem uma grande gama de indústrias e aplicações, como elétrica, mecânica, escoamento e química. Use a função de busca "Quick Search" para encontrar apresentações na sua área de interesse.

A Comparative Study of the Basic Flow Field Designs for High Temperature Proton Exchange Membrane Fuel Cells - new

A. Lele[1], N. Lodha[1], R. Srivastava[1], A. Pandey[2], A. Paul[3]
[1]CSIR - National Chemical Laboratory, Pune, Maharashtra, India
[2]Reliance Industries Ltd., Reliance Technology Group, Navi Mumbai, Maharashtra, India
[3]CSIR - Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, India

A Proton Exchange Membrane Fuel Cell (PEMFC) comprises a membrane-electrode assembly sandwiched between two conducting ‘monopolar’ plates having engraved gas flow channels, also called the flow field. The purpose of the flow field is to provide sufficient residence time for the gases to undergo reactions at the two electrodes, effect a homogeneous distribution of reactant gases over the given ...

Mathematical Modeling of Direct Borohydride Fuel Cells and its Experimental Validation

A. K. R. Paul[1], K. S. Gandhi[2], and A. K. Shukla[3]
[1] Central Electrochemical Research Institute – Madras Unit, CSIR Complex, Taramani, Chennai, Tamil Nadu, India
[2] Department of Chemical Engineering, Indian Institute of Science, Bangalore , Karnataka, India
[3] Solid State & Structural Chemistry Unit, Indian Institute of Science, Bangalore , Karnataka, India

  Direct borohydride fuel cells (DBFCs) use sodium borohydride (NaBH4) as fuel and hydrogen peroxide (H2O2) as an oxidant. A mathematical model encompassing mass balance of ionic species in different regions of the DBFC is developed. Both the oxidation of sodium borohydride and reduction of hydrogen peroxide are assumed to obey Tafel kinetics. This is combined with boundary conditions ...

A Non-isothermal Modeling of a Polymer Electrolyte Membrane Fuel Cell

H. Shin[1]

[1]Department of Mechanical Engineering, University of Michigan – Ann Arbor, Michigan, USA

Polymer electrolyte membrane (PEM) fuel cells have attracted attention as an alternative power source in various applications such as vehicles, portable supplies, and stationary power systems. A non-isothermal PEM fuel model is developed and simulated by using COMSOL Multiphysics. Although PEM fuel cells have been expected to be extensively used as an alternative power source, there have been ...

Kinetic Investigation of a Mechanism for Generating Microstructures on Polycrystalline Substrates Using an Electroplating Process

T. Soares[1], H. Mozaffari[2], H. Reinecke[1]
[1]Universität Freiburg, Freiburg im Breisgau, BW, Germany
[2]Hochschule Furtwangen, Tuttlingen, BW, Germany

The purpose of this study is to understand the growth mechanism of copper (Cu) films on a Cu-Zn system substrate with a pre-defined pattern. The pattern was defined by conducting a selective etching process on a two-phase polycrystalline substrate. As a result of this process, there were etched regions correspondent to beta-phase crystals and quasi non-etched regions that belong to alpha-phase ...

Numerical Modelling of Electrophoresis Applied to Restoration of Archaeological Organic Materials

J. Caire[1], A. Bouh[1], and E. Guilminot[2]
[1]LEPMI, UMR 5631, INPG - CNRS, Saint Martin d’Hères, France
[2]EPCC, Arc'Antique, Nantes, France

Restoration of archaeological materials from oceans is a major activity of Arc’ Antique. Organic materials such as wood, tissues, leathers, papers and ceramics found in sea water are always impregnated with salts. Rinsing such archaeological objects with pure water to extract the salts takes too long, so electrophoresis was used to improve the salt extraction. The objective of this ...

Optimizing Fuel Cell Design with COMSOL Multiphysics

Chin-Hsien Cheng[1]
[1]Renewable Energy RD Center, Chung-Hsin Electric & Machinery, Taiwan

Proton exchange membrane fuel cells (PEMFCs) were investigated using COMSOL Multiphysics with the AC/DC Module and Chemical Engineering Module. Simulation may be used to increase the performance while decreasing the cost of the catalyst later (CL). Experimental validation of single and multi-layer CL was performed for varied PBI electrolyte content. The validated model was used to investigate the ...

Determining Degradation in Solid Oxide Fuel Cells Electrode Materials Using COMSOL Multiphyics® Software - new

G. Cui[1], Z. Chen[1], F. Tariq[1], V. Yufit[1], N. Brandon[1]
[1]Imperial College London, London, UK

Solid Oxide Fuel Cells (SOFCs) are one of the most attractive technologies for meeting our future energy demands. They promise the efficient conversion of chemical to electrical energy and are a growing area of both academic and industrial interests. Typical electrode-supported SOFCs consist of three key components, two porous functional electrode layers (anode and cathode) and one dense ...

Multiphysics Simulation of an Anode-supported Micro-tubular Solid Oxide Fuel Cell (SOFC)

G. Ganzer, W. Beckert, T. Pfeifer, and A. Michaelis
Fraunhofer IKTS
Dresden, Germany

The high thermal stability and fast start-up behavior make micro-tubular solid oxide fuel cells (SOFCs) a promising alternative for small-scale, mobile power devices in the range of some Watts. To understand the transport phenomena inside a single micro-tubular SOFC, a 2-D, axi-symmetric, non-isothermal model, performed in COMSOL Multiphysics® 4.2, has been developed. Due to long current path ...

Sensitivity Analysis for High Temperature Proton Exchange Membrane Fuel Cell - new

A. Lele[1], N. Lodha[1], R. Srivastava[1], U. Bipinlal[1], A. Pandey[2], A. Paul[3]
[1]CSIR - National Chemical Laboratory, Pune, Maharashtra, India
[2]Reliance Industries Ltd., Reliance Technology Group, Navi Mumbai, Maharashtra, India
[3]CSIR - Central Electrochemical Research Institute, Chennai, Tamil Nadu, India

A Proton Exchange Membrane Fuel Cell (PEMFC) is an electrochemical device, which converts a part of heat from the formation of water into electricity. Each cell has a Membrane-Electrode Assembly (MEA) which is placed between two electrically conducting plates having gas flow channels. An MEA is made of a solid proton-conducting electrolyte sandwiched between two electrodes (anode and cathode). ...

Finite Element Analysis of an Enzymatic Biofuel Cell: The Orientations of a chip inside a blood artery

C. Wang[1], Y. Parikh[1], Y. Song[1], and J. Yang[1]
[1]Mechanical & Materials Science Engineering, Florida International University, Miami, Florida, USA

Output performance of an implantable enzymatic biofuel cell (EBFC) with three- dimensional highly dense micro-electrode arrays has been simulated with a finite element analysis approach. The purpose of this research is to optimize the orientation of this EBFC chip inside a blood artery such that the mass transport of glucose around all the micro-electrodes can be improved and hence output ...