Water transport through gas diffusion layer of proton exchange membrane fuels cells is investigated experimentally. A filtration cell is designed and the permeation threshold and the apparent water permeability of several carbon papers are investigated. Similar carbon paper with different thicknesses and different Teflon loadings are tested to study the effects of geometrical and surface proper...

1 ENSTA Paris-Tech, 32, Bd. Victor, 75739 Paris cedex 15 – France Tél. : 01 45 52 60 81 Fax : 01 45 52 83 27 [email protected] www.ensta.fr 2 ESYCOM, Université Paris-Est Marne-La-Vallée, 5 Bd Descartes, Champs-surMarne 77454 Marne La Vallée – France Tél. : 01 60 95 72 62 Fax : 01 60 95 72 14 [email protected] [email protected] www.esycom.univ-mlv.fr 3 CEA-Leti, 17, Avenue des Mart...

The open architecture of cathodes in Li–air batteries implies the need for porosity with adequate pore size distribution and surface energy optimization regard to electrolyte. interaction liquid cathode material, especially wetting properties, which depend on roughness porosity, electrolyte needs be understood properly avoid flooding assure high active areas. In this work, contact angle goniome...

We have written a reference manual to use JUDE (Jayant’s UVIT Data Explorer) data pipeline software for processing and reducing the Ultraviolet Imaging Telescope (UVIT) Level 1 into event lists images—Level 2 data. The is in GNU Language (GDL) released as an open-source which may be freely used modified. GDL was chosen because it interpreted language allowing interactive analysis of data; thus ...

1 ENSTA Paris-Tech, 32, Bd. Victor, 75739 Paris cedex 15 – France Tél. : 01 45 52 60 81 Fax : 01 45 52 83 27 [email protected] www.ensta.fr 2 ESYCOM, Université Paris-Est Marne-La-Vallée, 5 Bd Descartes, Champs-surMarne 77454 Marne La Vallée – France Tél. : 01 60 95 72 62 Fax : 01 60 95 72 14 [email protected] [email protected] www.esycom.univ-mlv.fr 3 CEA-Leti, 17, Avenue des Mart...

Abstract Anion exchange membrane fuel cells (AEMFCs) are in development as a low-cost alternative to proton (PEMFCs). AEMFCs produce water at the anode side and consume it cathode side, resulting no flooding like PEMFCs. However, brings complexity transportation behavior requires appropriate balance avoid drying out. In this study, two-dimensional two-phase multi-physics model has been develope...

Electrochemical pressure impedance spectroscopy (EPIS) was introduced in view to differentiating transport/transfer phenomena of gas and liquid occurring electrochemical cells. This work aimed at measuring EPIS a 100 cm2 membrane fuel cell upon predominant control from transport, conditions where the presence water is little significant. Operating with pure oxygen allowed observation convection...

Liquid water produced in a polymer electrolyte membrane fuel cell experiences a freeze/thaw cycle when the cell is switched off and on while operating at ambient temperatures below freezing. This freeze/thaw cycle permanently deforms the polymer electrolyte membrane fuel cell capillary structures and reduces both the cell life and its ability to generate electric power. The X-ray tomography fac...

We present a situation calculus-based account of multiplayers synchronous games in the style of general game playing. Such games can be represented as action theories of a special form, situation calculus synchronous game structures (SCSGSs), in which we have a single action tick whose effects depend on the combination of moves selected by the players. Then one can express properties of the gam...

In this semitutorial paper we discuss a general message passing algorithm, which we call the generalized distributive law (GDL). The GDL is a synthesis of the work of many authors in the information theory, digital communications, signal processing, statistics, and artificial intelligence communities. It includes as special cases the Baum–Welch algorithm, the fast Fourier transform (FFT) on any...