Abstract: “What optimal performance can a PEM fuel cell reach?” Finding answers to this enduring question is an essential step for continuous improvement in the fuel cell design method. In this lecture, a brief review of the inverse theory is firstly given, and then the status of the recent researches of the experimental methods and the modeling concerning the transport phenomena in the PEM fuel cell is addressed. Based on these physical models the effects of different types of flow field, geometrical and physical variables, and operational parameters are evaluated. Meanwhile, a three-dimensional computational fluid dynamics code, which is executed on a personal-computer cluster based on parallel computation algorithm and capable of simulating the transient, three-dimensional electrochemical and transport process taking place in the PEM fuel cells, has been developed. An optimization approach is constructed by combining the developed physical models with the inverse heat transfer theory plus a grid generator. The results obtained by the optimization approach help us identify these influential parameters, elucidate the basic physical mechanisms for the optimal design, and facilitate the iterative modification process starting from an initial conceptual design.

PLENARY LECTURE 2

A Model for Binding of Metals to Surfactant and Polyelectrolyte

Professor Yi-Chu Huang

Department of Environmental Science and Engineering
National Pingtung University of Science and Technology
1 Hsueh Fu Road, Nei-Pu Hsiang, Pingtung 91201
TAIWAN, R.O.C.

E-mail: ych@mail.npust.edu.tw

Abstract: The underlying principle of micellar-enhanced ultrafiltration (MEUF) and polyelectrolyte-enhanced ultrafiltration (PEUF) is to increase the size of target metal ions by fixing them to larger surfactant and polyelectrolytes so they can be retained by an ultrafiltration membrane. Continuous diafiltration experiments were performed to study the binding characteristics, such as binding isotherms, association constant (Ka) with corresponding binding sites (n), of surfactant (sodium dodecyl sulfate) and polyelectrolyte (poly (styrenesulfonic acid-co-maleic acid) sodium, PSSM) to four heavy metals (Cu, Zn, Cd, and Pb), individually and collectively. These parameters are useful in designing an efficient MEUF or PEUF system. The results showed that zinc exhibited the strongest binding to SDS when present individually, as well as collectively, at pH 6, whereas lead showed the strongest binding when present at pH 3 in the mixture.molar. The binding ratio, r, of PSSM to Cu2+ was the largest whether in individual or in collective metal solutions. There are two types of binding characteristics for SDS and PSSM to Cu2+, Zn2+, Cd2+ and Pb2+. The higher the r of SDS and PSSM to metals, the larger the n1 is. The Ka1 of four metals are apparently larger than Ka2 in metal mixture.

SPECIAL SESSION: Multi-Scale Modelling. Special Emphasis and Examples from Hydrate Phase Transition Modelling and Supercritical Outsalting

Chair: Bjørn Kvamme

Heterogeneous growth of hydrate on the CO₂/aqueous solution interface	Bjørn Kvamme, Trygve Buanes, Tatyana Kuznetsova	550-285
Mechanisms for kinetic hydrate inhibitors	Bjørn Kvamme, Remi Åsnes	550-287
Numerical Analysis of In-Situ Methane Hydrate Formation in Sandstone	J. Husebo, B. Kvamme, A. Graue	550-382
Multiscale modelling of supercritical outsalting	Tatyana Kuznetsova, Martin Hovland, Hίkon Rueslatten, Bjørn Kvamme, Hans Konrad Johnsen, Gunnar Fladmark	550-390
Experimental measurements and numerical modelling of interfacial tension in water-methane systems	Bjørn Kvamme, Tatyana Kuznetsova, Kurt A. G. Schmidt	550-381
Phase field modeling of the conversion from methane hydrate to carbon dioxide hydrate	György Tegze, László Gránásy, Bjørn Kvamme	550-293
A Mathematic Model for Removal of Heavy Metals from Wastestreams by Surfactant and Ultrafiltration	Yi-Chu Huang, Ting-nien Wu	550-251

Thursday, January 18, 2007

SESSION: Thermal Science and applications

Chair: Chin-Hsiang Cheng, Massimo Corcione

On propagation of discontinuity waves in thermo-piezoelectric bodies	Adriano Montanaro	550-211
Experimental characterization of the thermal behavior of intumescent paints	Maria Cappelli D'Orazio, Massimo Corcione, Lucia Fontana	550-359
Numerical and Experimental Investigation to the Melting Mechanism of Granular Powders for Vitrification by Induction Thermal Plasmas	M. M. Hossain, Y. Yao, Y. Oyamatsu, T. Watanabe, F. Funabiki, T. Yano	550-202
Mathematic Description of Biological Changes in the Cured Hides Soaking	Dagmar Janacova, Karel Kolomaznik, Pavel Mokrejs, Vladimir Vasek, Hana Charvatova	550-259
Three Dimensional Transport Model Using in Soaking Process	Karel Kolomaznik, Tomas Furst, Dagmar Janacova, Vladimir Vasek, Michaela Uhlirova	550-268
Fundamental Study on the Radical Ignition Technique Using Constant Volume Chamber (CVC)	Jongsang Park, Jeongkuk Yeom, Jongyul Ha, Sipom Kim, Geunjo Han, Sungsik Chung	550-256 p.p 67-72
Simulation of Effects of Nafion Loading in Catalyst Layer on Performance of Proton Exchange Membrane Fuel Cells	Chin-Hsiang Cheng, Hung-Hsiang Lin, Guang-Jer Lai	550-297
Model of non-balanced circulation systems	Zoltan Szantho, Gabor Nemeth	538-246

Friday, January 19, 2007

SESSION: Heat and mass transfer

Chair: Shyan-Fu Chou, Jonas Gylys

Magnetic field effects on coupled heat and mass transfer by mixed convection along a vertical surface embedded in a porous medium by integral methods	Ching-Yang Cheng	550-170
Natural convection from a horizontal cylinder of elliptic cross section in saturated porous media using a thermal non-equilibrium model	Ching-Yang Cheng	550-171
Steel quenching in liquid media under pressure	Nikolai Kobasko	550-450
Performance Improvement on Water-cooled Cold-plate	Shyan-Fu Chou, Heng-I Lin, and Yi-Ping Wang	550-394
Study of In-line Tube Bundle Cooling in Vertical Foam Flow	Jonas Gylys, Tadas Zdankus, Stasys Sinkunas, Vidmantas Giedraitis	550-242
Transient Heat Conduction for Micro Sphere	Hossein Pourmohamadian, Hassan Basirat Tabrizi	550-262