The utilization of evaporative cooling in the gas diffusion layers (GDLs) fuel cells or electrolyzers can effectively dissipate heat produced by high power density operation, thus leading to economically more competitive electrochemical cells. highly porous GDLs offer a large surface area, allowing cope with larger fluxes and evaporation rates. understanding best GDL structure cell operating co...

Stochastic 3D Modeling of the GDL Structure in PEMFCs Based on Thin Section Detection Ralf Thiedmann, Frank Fleischer, Christoph Hartnig, Werner Lehnert,* and Volker Schmidt Institute of Stochastics, Ulm University, 89069 Ulm, Germany Medical Data Services/Biostatistics, Boehringer Ingelheim Pharma GmbH and Company KG, 88397 Biberach, Germany Center for Solar Energy and Hydrogen Research Baden-...

HAJER BAAZAOUI ZGHAL, MARIE-AUDE AUFAURE , NESRINE BEN MUSTAPHA Riadi-GDL Laboratory, ENSI Campus Universitaire de la Manouba, Tunis, Tunisia {Hajer.baazaouizghal, nesrine.benmustapha}@riadi.rnu.tn Supelec, Computer Science Department, Plateau du Moulon, 91 192 Gif sur Yvette, France [email protected] Inria Paris-Rocquencourt, Axis project, Domaine de Voluceau, 78 153 Le Chesnay Ced...

In this paper, we propose an efficient and practical authenticated key exchange (AKE) protocol from ideal lattices, which is well-designed and has some similarity to the HMQV protocol. Using the hardness of the graded discrete logarithm (GDL) problem and graded decisional Diffie-Hellman (GCDH) problem, the proposed protocol is provably secure in the extended Canetti-Krawczyk model.

Milk protein concentrate powders (MPC) with improved rehydration properties are often manufactured using processing steps, such as acidification and high-pressure processing, and with addition of other ingredients, such as sodium chloride, during their production. These steps are known to increase the amount of serum caseins or modify the mineral equilibrium, hence improving solubility of the r...

We analyze the controllability and observability (C/O) of the liquid water distribution in the gas diffusion layer (GDL) of a polymer electrolyte membrane fuel cell (PEMFC) using a one-dimensional channel-to-channel unit fuel cell model. This modeling domain is sufficient to illustrate the control objectives and analysis techniques but requires further development for stack level modeling. A co...

The product water of polymer electrolyte fuel cells (PEFCs) has to pervade the gas diffusion layer (GDL) and can lead shortages educt pathways catalyst hence significant performance losses. Here we report on efforts made enable subsecond submicron operando X-ray tomographic microscopy (XTM) over a wide range cell operating temperatures. short XTM scan times allow quantify contributions capillar...

In this paper, a comparative study based on Finite Element Method has been established in order to investigate the effect of bipolar plate materials stress and temperature distribution proton exchange membrane fuel cell stack under functioning conditions. The analysis is conducted for three materials: Graphite BP, stamped uncoated stainless steel SS316L, Niobium coated SS316L. ICR (Interfacial ...

A new fabrication technique is employed to convert a metallic foil into a porous structure with an array of micron size pores. The motivation stems from the need to develop a more efficient and controllable gas diffusion medium for fuel cell applications. The influence of mask shape, mask width and etching time was investigated experimentally. A correlation to predict trench width with etching ...

This paper proposes two ways to instantiate general games specified in the game description language GDL to enhance exploration efficiencies of existing players. One uses Prolog’s inference mechanism to find supersets of reachable atoms and moves; the other one utilizes dependency graphs, a datastructure that can calculate the dependencies of the arguments of predicates by evaluating the variou...