X. Guan, E. Gratz, U. Pal
Division of Materials Science and Engineering, Boston University, Brookline, MA, USA
Computational fluid dynamics (CFD) modeling is a useful tool to gain an insight into various high temperature metallurgical processes such as the magnesium refining and the magnesium solid oxide membrane (SOM) electrolysis. In both processes, argon gas was used to stir the molten salt (flux) in order to improve the transport of magnesium vapor out of the flux and achieve chemical homogeneity in ...
G. Madabattula, S. K. Gupta
Department of Chemical Engineering, Indian Institute of Science, Bangalore, Karnataka, India
Low cost high energy density batteries that can be charged and discharged rapidly are required in a number of applications. Tapping energy from renewal resources such as solar, wind and tide requires rapidly generated energy to be first stored and then used round the clock. Storing energy of a moving vehicle as it slows down and recovering it to accelerate the vehicle later can significantly ...
M. C. B. Kumar, D. B. Prabhu, R. Akila, A. Gupta, M. Alagappan
PSG College of Technology, Coimbatore, Tamil nadu, India
This paper discusses the simulation studies on a vibration based energy harvesting system to convert the undesirable mechanical vibration to useful green power. The design consists of a resonating proof mass and a spring system enclosed in housing and fixed on the source of vibration. A piezoelectric suspension acts as the transducer and generates a voltage that is used to charge the batteries of ...
P. Alotto, M. Guarnieri, and F. Moro
Dipartimento di Ingegneria Elettrica, Università di Padova, Padova, Italy
The proton exchange membrane is a key component in the currently widely studied Proton Exchange Membrane Fuel Cells. In this paper a fully coupled three-dimensional dynamic numerical model of the membrane including all the physically relevant phenomena, i.e. ion transport, hydration-dependent conductivity and thermal effects is presented. The highly non-linear model is discretized by means of the ...
Simulation and in-situ Investigation of the Water Transport in the Porous Layers of Hydrogen Operated PEM Fuel Cells
C. Ziegler, T. Heilmann, and J. Hermann
Fraunhofer Institut für Solare Energiesysteme, Freiburg
Water management is one of the most important issues of current research in the field of proton exchange membrane fuel cells (PEMFCs). Understanding the transport of liquid water in the fuel cell is necessary for the optimization of the design and the control of PEMFCs. This paper presents a mathematical model that describes the dynamic two-phase transport and the experimentally observed ...
Z. Shi, X. Wang, and Z. Zhang
Oakland University, Rochester, MI
Two different two-dimensional mathematical models of the one PEM fuel cell are modeled using COMSOL Multiphysics, each considering a different cross-section. The first Models considers the influence of fluid behavior in the channel, while the second considers the interdigitated flow pattern. Results, including the mass concentration, the polarization curve, potential distribution and velocity ...
G.H. Miley, and E.D. Byrd
 Department of NPRE, University of Illinois at Urbana-Champaign
 Department of ECE, University of Illinois at Urbana-Champaign
A model has been designed and constructed for the all-liquid, sodium borohydride/hydrogen peroxide fuel cell. The electrochemical behavior, momentum balance, and mass balance effects within the fuel cell are modeled using the Butler-Volmer equations, Darcy’s law, and Fick’s law, respectively within COMSOL Mutiphysics. The simulations performed with the model indicate that an optimal ...
S.P. Katukota, J. Chen, and R.F. Boehm
University of Nevada, Las Vegas
Proton Exchange Membrane (PEM) electrolysis is potentially a sustainable and cost-effective technology for generating hydrogen. The present work is aimed to develop a numerical model for the PEM electrolyzer cell.
A Complete Transport Model of Components through Zeolite Membranes in a Wicke-Kallenbach Permeation Cell
C.J. Kamp, I. Perdana, and D. Creaser
Chalmers University of Technology, Gothenburg, Sweden,
This study discusses the development of a complete model for multi-component mass transport through a zeolite membrane in a Wicke-Kallenbach permeation cell. A three dimensional permeation cell model was built in COMSOL Multiphysics. The general PDE mode was used to apply the Maxwell-Stefan equations for surface diffusion, the dominant transport mechanism in zeolite micropores, while the ...
C. Boffo, C. Cooper, G. Galasso, and A. Rowe
 FNAL, Batavia, IL 60510, U.S.A.
 Università degli Studi di Udine
Buffer chemical polishing is a cheap, simple and effective processing technique for single grain high gradient and polycrystalline lower gradient cavities. This paper describes the thermal-fluid finite element model adopted to simulate the process, the experimental flow visualization tests performed to verify the simulation and a novel device fabricated to solve the problem.