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Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Thermal Battery Cell Modeling in a Spirally-Wound Geometry

G.Liebig[1], L. Komsiyska[1], P. Bise[1], H. Seeba[1], P. Bohn[2], S. Vasic [1]
[1]NEXT ENERGY, Oldenburg, Niedersachsen, Germany
[2]AUDI AG, Ingolstadt, Bayern, Germany

The characterization of Li-ion batteries is a relevant topic due to the recent developments in Electric Vehicles (EV’s) and Hybrid Electric Vehicles (HEV’s) applications. In order to manage these devices, accurate models are required. At NEXT ENERGY a two dimensional cell-level thermal model was created based on the discharge characteristics of a cylindrical 18650 secondary Li-ion battery ...

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 ...

Clean Energy Technologies: Growing Need for Multiphysics Modeling

Iouri Balachov
Senior Scientist,
SRI International, Menlo Park, CA, USA

Iouri Balachov is a Senior Scientist at SRI International (Menlo Park, CA) where he is leading development of Direct Carbon Fuel Cell technology for clean and efficient power generation from coal, biomass, and a wide variety of carbon containing fuels. Prior to SRI he was an engineer at Westinghouse nuclear (Pittsburgh, PA), researcher at Penn State University (State College, PA), and researcher ...

Development of Tiny Fuel Cells for Micro-devices on the Basis of Simulation Results

S. Tominaka
International Center for Materials Nanoarchitectonics
National Institute for Materials Science
Japan

For the successful exploitation of microdevices such as microsensors, development of micro-power sources is strongly required. In this view, microbatteries and microfuel cells have been developed. Here the concept of on-chip fuel cells, which consist of all the components necessary for power generation integrated on a chip, is introduced. Then, in order to improve their performance, experimental ...

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 ...

Simulation of a Heated Tool System for Jet Electrochemical Machining

M. Hackert[1], G. Meichsner[2], and A. Schubert[1][2]

[1]Chair Micromanufacturing Technology, Faculty of Mechanical Engineering, Chemnitz University of Technology, Chemnitz, Germany
[2]Fraunhofer Institute for Machine Tools and Forming Technology, Chemnitz, Germany

Jet Electrochemical Machining (Jet-ECM) is an unconventional procedure using localized anodic dissolution for micromachining. An increasing of the electrolyte temperature will lead to an increase of the electrical conductivity of the electrolyte by about 30% and to a reduction of the dynamic viscosity of the electrolyte by about 25 %. Both will improve the process. Therefore a Jet-ECM tool system ...

Low Pt Cathodes for High Performance PEMFCs: Modeling and Experiments

F. Daouda[1], J. Hamelin[1], P. Benard[1], S. Kumar Natarajan [1]
[1]Insitut de recherche sur l'hydrogène, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada

We present a novel multi-layered electrode fabrication technique for polymer electrolyte membrane fuel cells (PEMFCs). This method consists of alternate layers of Pt deposition (0.05 mg/cm²) by sputtering on the painted multi-walled carbon-Nafion layer (CNL) with larger concentration of catalyst particles closer to the membrane. Parametric models were developed and validated by experimental ...

Simulation of Current Collector Corrosion Effects on the Efficiency of Molten Carbonate Fuel Cells

I. Sgura[1], F. Zarcone[2], and B. Bozzini[2]
[1]Dipartimento di Matematica, Università del Salento, Lecce, Italy
[2]Brindisi Fuel Cell Durability Laboratory, Facoltà di Ingegneria Industriale, Università del Salento, Brindisi, Italy

Corrosion and contact ohmic resistance of the stainless steel current collectors in molten carbonates is one of the greatest obstacles to widespread application of molten carbonate fuel cells (MCFC). We simulate the variation of material parameters values, accounting for the impact of corrosion of the metallic current collectors on the performance of the porous cathode. Furthermore, we couple a ...

Modeling of the Transport Phenomena in Lithium-Ion Battery Electrolytes

A. Nyman, M. Behm, and G. Lindbergh
Applied Electrochemistry, School of Chemical Science and Engineering, Royal Institute of Technology Stockholm, Sweden

Modeling of mass transport is an important step in evaluating lithium-ion battery electrolytes and understanding cell performance. For high-power applications, concentration gradients in the electrolyte lead to limiting currents, which limit the power-density of the battery. The model has been used for determining a complete set of transport and thermodynamic properties for LiPF6 dissolved in an ...

Numerical Simulation of Carbon Steel Corrosion Exposed to Flowing NaCl Solutions Through an Annular Duct

A. Soliz[1], K. Mayrhofer[1], L. Caceres[2]
[1]Department of Interface Chemistry & Surface Engineering, Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
[2]Department of Chemical Engineering, University of Antofagasta, Antofagasta, Chile

A three-dimensional mathematical model under stationary conditions have been established to understand the corrosion of carbon steel cylindrical samples immersed in flowing NaCl solution through an annular duct. The migration, diffusion and convection mass transfer mechanisms were solved using the Nernst–Planck equation coupled to the Navier-Stokes equation. A corrosion model based on the mixed ...

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