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1. WO2002023653 - FUEL CELL UNIT WITH IMPROVED REACTION GAS UTILISATION

Publication Number WO/2002/023653
Publication Date 21.03.2002
International Application No. PCT/DE2001/003319
International Filing Date 29.08.2001
Chapter 2 Demand Filed 27.03.2002
IPC
H01M 8/0258 2016.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0258characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/04089 2016.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
04Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
04082Arrangements for control of reactant parameters, e.g. pressure or concentration
04089of gaseous reactants
H01M 8/24 2016.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
24Grouping of fuel cells, e.g. stacking of fuel cells
H01M 8/0662 2016.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
06Combination of fuel cells with means for production of reactants or for treatment of residues
0662Treatment of gaseous reactants or gaseous residues, e.g. cleaning
CPC
H01M 8/0258
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0258characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
H01M 8/0265
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
02Details
0202Collectors; Separators, e.g. bipolar separators; Interconnectors
0258characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
0265the reactant or coolant channels having varying cross sections
H01M 8/04097
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
04Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
04082Arrangements for control of reactant parameters, e.g. pressure or concentration
04089of gaseous reactants
04097with recycling of the reactants
H01M 8/0662
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
06Combination of fuel cells with means for production of reactants or for treatment of residues
0662Treatment of gaseous reactants or gaseous residues, e.g. cleaning
H01M 8/2405
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
24Grouping of fuel cells, e.g. stacking of fuel cells
2405comprising spaced diffusion electrodes or electrode layers with interposed electrolyte layer or electrolyte compartment
H01M 8/241
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
8Fuel cells; Manufacture thereof
24Grouping of fuel cells, e.g. stacking of fuel cells
241with solid or matrix-supported electrolytes
Applicants
  • SIEMENS AKTIENGESELLSCHAFT [DE]/[DE] (AllExceptUS)
  • EMITEC GESELLSCHAFT FÜR EMISSIONSTECHNOLOGIE MBH [DE]/[DE] (AllExceptUS)
  • REIZIG, Meike [DE]/[DE] (UsOnly)
  • BRÜCK, Rolf [DE]/[DE] (UsOnly)
  • GROßE, Joachim [DE]/[DE] (UsOnly)
  • KONIECZNY, Jörg-Roman [DE]/[DE] (UsOnly)
Inventors
  • REIZIG, Meike
  • BRÜCK, Rolf
  • GROßE, Joachim
  • KONIECZNY, Jörg-Roman
Common Representative
  • SIEMENS AKTIENGESELLSCHAFT
Priority Data
100 45 098.912.09.2000DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) BRENNSTOFFZELLENANLAGE MIT VERBESSERTER REAKTIONSGASAUSNUTZUNG
(EN) FUEL CELL UNIT WITH IMPROVED REACTION GAS UTILISATION
(FR) INSTALLATION DE PILES A COMBUSTIBLE ASSURANT UNE MEILLEURE EXPLOITATION DU GAZ DE REACTION
Abstract
(DE)
Die Erfindung betrifft eine Brennstoffzellenanlage mit einem Brennstoffzellenstapel mit verbesserter Reaktionsgasausnutzung durch variablen Stoffübergangskoeffizienten innerhalb des Stapels. Die Reaktionsgasausnutzung wird durch Anpassung und Strukturierung der Verteilungskanäle des Prozessgasstroms optimiert, so dass die laminare Strömung der glatten Kanäle in eine turbulente Strömung gewandelt wird und daraus eine Erhöhung des Stoffübergangskoeffizienten $g(b) im hinteren Bereich des Stapels resultiert. Nach einer bevorzugten Ausgestaltung sind in den Verteilungskanälen der Polplatten Stolperkanten und Umlenkungen vorgesehen, durch die die Strömungshauptrichtung auf die aktive Zellfläche hingelenkt wird.
(EN)
The invention relates to a fuel cell unit with a fuel cell stack with improved reaction gas utilisation by means of variable mass transfer coefficients within the stack. The reaction gas utilisation is optimised by means of matching and shaping of the process gas stream distribution channels, such that the laminar flow in the smooth channels is turned into a turbulent flow and thus an increase in the mass transfer coefficient $g(b) in the back end of the stack occurs. According to a preferred embodiment, pole plates, tripping edges and deflectors are provided in the distribution channels, by means of which the main direction of flow may be diverted to the active cell surfaces.
(FR)
La présente invention concerne une installation de piles à combustible comprenant un empilement de piles à combustible et assurant une meilleure exploitation du gaz de réaction, au moyen de coefficients de transfert de masse variables à l'intérieur de cet empilement. L'exploitation du gaz de réaction est optimisée grâce à l'adaptation et à l'organisation des canaux de distribution du flux de gaz de processus, de façon que l'écoulement laminaire des canaux lisses soit transformé en un écoulement turbulent, ce qui résulte en une augmentation des coefficients de transfert de masse $g(b) dans la zone arrière de l'empilement. Dans un mode de réalisation préféré de la présente invention, des bords de butée et des systèmes de déviation sont pourvus dans les canaux de distribution des plaques polaires et permettent de dévier la direction principale d'écoulement sur la surface active des piles.
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