WO2012046248A1 - Conception de champ d'écoulement dans des piles à combustible - Google Patents

Conception de champ d'écoulement dans des piles à combustible Download PDF

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Publication number
WO2012046248A1
WO2012046248A1 PCT/IN2011/000693 IN2011000693W WO2012046248A1 WO 2012046248 A1 WO2012046248 A1 WO 2012046248A1 IN 2011000693 W IN2011000693 W IN 2011000693W WO 2012046248 A1 WO2012046248 A1 WO 2012046248A1
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WO
WIPO (PCT)
Prior art keywords
fuel
manifolds
group
manifold
flow
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PCT/IN2011/000693
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English (en)
Inventor
Prakash Chandra Ghosh
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Indian Institute Of Technology, Bombay
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Application filed by Indian Institute Of Technology, Bombay filed Critical Indian Institute Of Technology, Bombay
Publication of WO2012046248A1 publication Critical patent/WO2012046248A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
    • H01M8/0263—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant having meandering or serpentine paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
    • H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2483—Details of groupings of fuel cells characterised by internal manifolds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/2465—Details of groupings of fuel cells
    • H01M8/2484—Details of groupings of fuel cells characterised by external manifolds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • This invention relates to polymer electrolyte fuel cells, and more particularly but not exclusively to flow field and manifold for supplying fluids in fuel cells.
  • Fuel cells are electrochemical converters that convert chemical energy of fuel into electricity.
  • One of the types of fuel cells is Polymer Electrolyte Fuel Cell (PEFC) in which polymer membrane is used as electrolyte.
  • PEFC Polymer Electrolyte Fuel Cell
  • the PEFC includes a
  • the MEA comprises a polymer electrolyte with electrodes on both sides of the membrane. Further, on either sides of the MEA, porous and electronic conducting medium called Gas Diffusion Layer (GDL) are used.
  • GDL Gas Diffusion Layer
  • the GDL act as electron collectors and also provide the passage for the reactant gases to reach the electrodes.
  • the reactant gases are distributed on the electrode surfaces (anode and cathode) through the channels which are nonporous current collectors called flow field plates.
  • fuel cells are connected in series using bipolar plates which are used as inter connector between two adjacent cells.
  • the non porous current collectors of single cell are used as bipolar plate for stacking the cells.
  • the electrode reaction involved in the fuel cells operations is mainly exothermic, which require the removal of the produced heat.
  • coolant is used to maintain the operating temperature at constant level. In this purpose the coolant channels are incorporated on the bipolar plate as well.
  • a series of fuel cells are stacked between a pair of end plate immediately adjacent to the outermost bipolar plate or flow field plate.
  • the local performance inside the fuel cells is influenced by various parameters such as local temperature, water distribution, and partial pressure of the reactant gases. Additionally, for optimum performance, the reactant gases must be supplied on both sides of the electrode in appropriate proportions. The heterogeneous activities of the reactant gases on the electrodes of the fuel cells cause poor performance. Moreover, the heterogeneous activity is one of the important reasons for lessening the durability of fuel cells.
  • the reactant and coolant flow field design influences the performance of the fuel cell by controlling the temperature, pressure and water distribution inside the fuel cell.
  • the invention provides system for achieving desired flow pattern in a fuel cell.
  • the system includes a pair of fuel manifold configured to facilitate flow of fuel, wherein the pair of fuel manifolds comprises a first group of fuel manifolds and a second group of fuel manifolds. Further, a first set of channels defined on a bipolar plate and a second set of channels defined on the bipolar plate. The said first group of fuel manifolds is in fluid connection with the said first set of channels and the said second group of fuel manifolds is in fluid connection with the said second set of channels.
  • FIG. 1 illustrates an exploded view of a stack of fuel cells, in accordance with an embodiment
  • FIG. 2 illustrates a bipolar plate 108, in accordance with an embodiment
  • FIG. 3 illustrates the bipolar plate 108, in accordance with an embodiment
  • FIG. 4 illustrates valves that are configured with a pair of fuel manifolds 110a to 1 lOd to regulate flow of fuel through channels that are provided to accommodate flow of fuel, in accordance with an embodiment
  • FIG. 5 illustrates the flow of fuel in counter flow forward pattern, in accordance with an embodiment
  • FIG. 6 illustrates the flow of fuel in counter flow backward pattern, in accordance with an embodiment
  • FIG. 7 illustrates the flow of fuel in serpentine flow forward pattern, in accordance with an embodiment
  • FIG. 8 illustrates the flow of fuel in serpentine flow backward pattern, in accordance with an embodiment
  • FIG. 9 illustrates the flow of fuel in interdigitated flow pattern in forward direction, in accordance with an embodiment
  • FIG. 10 illustrates the flow of fuel in interdigitated flow pattern in forward direction, in accordance with an embodiment
  • FIG. 11 illustrates the flow of fuel in interdigitated flow pattern in backward direction, in accordance with an embodiment
  • FIG. 12 illustrates the flow of fuel in interdigitated flow pattern in backward direction, in accordance with an embodiment
  • FIG. 13 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment
  • FIG. 14 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment
  • FIG. 15 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment
  • FIG. 16 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment.
  • FIGS. 1 through 16 where similar reference characters denote corresponding features consistently throughout the figures, there are shown preferred embodiments.
  • FIG. 1 illustrates an exploded view of a stack of fuel cells, in accordance with an embodiment.
  • Each fuel cell includes a Membrane Electrode Assembly (MEA) 102.
  • MEA Membrane Electrode Assembly
  • gaskets 104 are provided on either side of the MEA 102.
  • bipolar plates 106 and 108 are provided on either side of the MEA 102.
  • the fuel cells are connected in series using bipolar plates, which are used as interconnector between two adjacent cells.
  • the MEA 102 includes a polymer electrolyte with electrodes on both sides of the membrane. On one side of the MEA 102 anode is provided and cathode is provided on the other side of the electrode.
  • GDL Gas Diffusion Layer
  • the GDL act as electron collector and also provide passage for reactant gases to reach the electrodes.
  • the reactant gases are distributed on the anode and cathode through channels provided on bipolar plates 108 and 106, respectively.
  • the reactant gases are supplied to the bipolar plates using respective fluid supply manifolds.
  • the stack of fuel cells has a pair of fluid supply manifolds 110a to HOd, 112a to 112d, and 114a to 114d.
  • pair of fuel manifold 110a to HOd facilitates flow of fuel, for example hydrogen
  • pair of coolant manifold 112a to 112d facilitates flow of coolant, for example, water
  • pair of fuel manifold 114a to 114d facilitates flow of oxidant, for example air.
  • the fuel manifolds 110a to HOd are connected to channels provided on bipolar plates that facilitate supply of fuel (hydrogen) to the anode.
  • the bipolar plates that are provided on the anode side will have channels provided on the side facing the anode for receiving fuel (hydrogen), and the side of the bipolar place facing away from the anode will have channels for receiving the coolant.
  • the bipolar plates that are provided on the cathode side will have channels provided on the side facing the cathode for receiving oxidant (air), and the side of the bipolar place facing away from the cathode will have channels for receiving the coolant.
  • respective manifolds will be fluidly connects to the channels.
  • FIG. 2 illustrates a bipolar plate 108, in accordance with an embodiment.
  • the bipolar plate illustrated in the figure is provided on the anode side of the MEA 102. Further, the side 204 of the bipolar plate 108 illustrated in the instant figure is the side facing the anode.
  • the surface of the bipolar plate 108 defines a first set of channels 202a and a second set of channels 202b to accommodate fuel supplied by a pair of fuel manifolds 110a to l lOd.
  • a first set of channels 202a is in fluid connection with a first group of fuel manifolds 110a and l lOd of the pair of fuel manifolds and a second set of channels 202b is in fluid connection (connection not illustrated) with a second group of fuel manifolds 110b and 110c of the pair of fuel manifolds.
  • FIG. 3 illustrates the bipolar plate 108, in accordance with an embodiment.
  • the bipolar plate 108 illustrated in the figure is provided on the anode side of the ME A 102. Further, the side 206 of the bipolar plate illustrated in the instant figure is the side facing away from the anode.
  • the surface of the bipolar plate defines channels to accommodate coolant supplied by coolant manifolds. The channel is in fluid connection with coolant manifolds 112b and 112c.
  • a bipolar plate 106 provided on the cathode side of the MEA 102 will have channels defined on its surface facing the cathode, wherein the channels accommodate oxidants supplied by a pair of oxidant manifolds 114a to 114d.
  • a first set of channels is in fluid connection with oxidant manifolds with a first group of oxidant manifolds 114a and 114d of the pair of oxidant manifolds
  • a second set of channels 202b is in fluid connection with a second group of oxidant manifolds 114b and 114c of the pair of oxidant manifolds.
  • the side of the bipolar plate facing away from the cathode has channel defined on its surface channels to accommodate coolant supplied by coolant manifolds. The channel is in fluid connection with coolant manifolds.
  • FIG. 4 illustrates valves that are configured with a pair of fuel manifolds 110a to l lOd to regulate flow of fuel through channels that are provided to accommodate flow of fuel.
  • the figure illustrates a pair of fuel manifolds, a first group of fuel manifold 110a and l lOd are fluidly connected through a first set of channels 202a provided on the bipolar plate 108, and a second group of fuel manifold 110b and 110c are . fluidly connected through a second set of channels 202b provided on the bipolar plate 108. Further, desired flow is achieved through the first 202a and second 202b set of channels by operating the valves that are configured with the fuel manifolds 112a to 112d.
  • valves are configured with fuel manifolds to achieve desired flow through the channels 202a and 202b provided on the bipolar plates 108 by opening some valves while other valves are kept closed.
  • fuel is supplied through a pair of fuel manifolds 110a to 1 lOd.
  • the pair of fuel manifolds 110a to 1 lOd includes a first group of fuel manifolds 110a and 1 lOd and a second group of fuel manifolds 110b and 110c.
  • the first group of fuel manifolds 110a and l lOd includes two manifolds that are in fluid connection through first set of fuel channels 202a defined on the surface 204 of the bipolar plates 108.
  • the two manifolds are provided at the ends of the first set of fuel channels 202a.
  • the second group of fuel manifolds 110b and 110c includes two manifolds that are in fluid connection through second set of fuel channels 202b defined on the surface 204 of the bipolar plates 108.
  • the two manifolds are provided at the ends of the second set of fuel channels 202b.
  • the valves configured with the pair of fuel manifolds can be operated to establish connection between any of fuel inlet 402 and fuel outlet 404 with the pair of manifolds.
  • valves are configured with the pair of fuel manifolds.
  • a first valve “B” is provided between the first manifold 110a of the first group of manifolds and the fuel inlet 402
  • a second valve “G” is provided between the first manifold 110a of the first group of manifolds and the fuel outlet 404
  • a third valve “E” is provided between the second manifold l lOd of the first group of manifolds and the fuel inlet 402
  • a fourth valve “C” is provided between the second manifold 1 lOd of the first group of manifolds and the fuel outlet 404
  • a fifth valve "H” is provided between the first manifold 110b of the second group of manifolds and the fuel inlet 402
  • a sixth valve “D” is provided between the first manifold 110b of the second group of manifolds and the fuel outlet 404
  • a seventh valve "A” is provided between the second 110c manifold of the second group of
  • Table 1 provides the status at which each of the eight valves has to be maintained to achieve a desired flow pattern.
  • a counter flow pattern in forward direction is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 5 illustrates the flow of fuel in counter flow forward pattern, in accordance with an embodiment.
  • the first valve B, fourth valve C, sixth valve D and seventh valve A are left open, while all other valves remain closed.
  • the first manifold 110a of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the inlet 402.
  • the second manifold l lOd of the first group of manifolds and the first manifold 110b of the second group of manifolds are connected to the outlet 404.
  • fuel flow in counter flow forward pattern is established.
  • the fuel from the fuel inlet 402 is supplied to the first manifold 110a of the first group of manifolds and second manifold 110c of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the first valve that is kept open and reaches the first set of channels 202a.
  • the fuel circulates through the first set of channels and reaches the end of the first set of channels to which the second manifold l lOd of the first group of manifolds is connected.
  • the fuel later passes through the fourth valve that is kept open and reaches the fuel outlet 404.
  • the fuel from the fuel inlet 402 passes through the seventh valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the first manifold 110b of the second group of manifolds is connected.
  • the fuel later passes through the sixth valve that is kept open and reaches the fuel outlet 404. It may be noted that by establishing the flow of fuel in a pattern as described above, the fuel flow in the first set and second set of channels 202b is in opposite direction.
  • a counter flow pattern in backward direction is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 6 illustrates the flow of fuel in counter flow backward pattern, in accordance with an embodiment.
  • the third valve E, eighth valve F, second valve G and fifth valve H are left open, while all other valves remain closed.
  • the first manifold 110b of the second group of manifolds and the second manifold HOd of the first group of manifolds are connected to the inlet 402.
  • the first manifold 110a of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the outlet 404.
  • fuel flow in counter flow forward pattern is established.
  • the fuel from the fuel inlet 402 is supplied to the first manifold 110b of the second group of manifolds and second manifold HOd of the first group of manifolds.
  • the fuel . from the fuel inlet 402 passes through the fifth valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the second manifold 110c of the second group of manifolds is connected.
  • the fuel later passes through the eighth valve that is kept open and reaches the fuel outlet 404.
  • the fuel from the fuel inlet 402 passes through the third valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202ato which the first manifold 110a of the first group of manifolds is connected.
  • the fuel later passes through the second manifold that is kept open and reaches the fuel outlet 404. It may be noted that by establishing the flow of fuel in a pattern as described above, the fuel flow in the first set and second set of channels 202b is in opposite direction.
  • a serpentine flow pattern in forward direction is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 7 illustrates the flow of fuel in serpentine flow forward pattern, in accordance with an embodiment.
  • the first valve B, fourth valve C, eighth valve F and fifth valve H are left open, while all other valves remain closed.
  • the first manifold 110a of the first group of manifolds and the first manifold 110b of the second group of manifolds are connected to the inlet 402.
  • the second manifold 1 lOd of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the outlet 404.
  • fuel flow in serpentine pattern in forward direction is established.
  • the fuel from the fuel inlet 402 is supplied to the first manifold 110a of the first group of manifolds and first manifold 110b of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the first valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the second manifold l lOd of the first group of manifolds is connected.
  • the fuel later passes through the fourth valve that is kept open and reaches the fuel outlet 404.
  • the fuel from the fuel inlet 402 passes through the fifth valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the second manifold 110c of the second group of manifolds is connected.
  • the fuel later passes through the fourth valve that is kept open and reaches the fuel outlet 404. It may be noted that by establishing the flow of fuel in a pattern as described above, the fuel flow in the first set and second set of channels 202b is in the same direction.
  • a serpentine flow pattern in backward direction is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 8 illustrates the flow of fuel in serpentine flow backward pattern, in accordance with an embodiment.
  • the seventh valve A, sixth valve D, third valve E and second valve G are left open, while all other valves remain closed.
  • the second manifold l lOd of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the inlet 402.
  • the first manifold 110a of the first group of manifolds and the first manifold 110b of the second group of manifolds are connected to the outlet 404.
  • fuel flow in serpentine pattern in backward direction is established.
  • the fuel from the fuel inlet 402 is supplied to the second manifold 1 lOd of the first group of manifolds and second manifold 110c of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the third valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the first manifold 110a of the first group of manifolds is connected.
  • the fuel later passes through the second valve that is kept open and reaches the fuel outlet 404.
  • the fuel from the fuel inlet 402 passes through the seventh valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the first manifold 110b of the second group of manifolds is connected.
  • the fuel later passes through the sixth valve that is kept open and reaches the fuel outlet 404. It may be noted that by establishing the flow of fuel in a pattern as described above, the fuel flow in the first set and second set of channels 202b is in the same direction.
  • an interdigitated flow pattern in forward direction (1) is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 9 illustrates the flow of fuel in interdigitated flow pattern in forward direction, in accordance with an embodiment.
  • the first valve "B” and eight valve “F ⁇ are left open, while all other valves remain closed.
  • the first manifold 110a of the first group of manifolds is connected to the inlet 402.
  • second manifold 110c of the second group of manifolds is connected to the outlet 404.
  • an interdigitated flow pattern in forward direction is an interdigitated flow pattern in forward direction
  • FIG. 10 illustrates the flow of fuel in interdigitated flow pattern in forward direction, in accordance with an embodiment.
  • first manifold 110b of the second group of manifolds is connected to the inlet 402.
  • second manifold HOd of the first group of manifolds is connected to the outlet 404.
  • an interdigitated flow pattern in backward direction (1) is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 11 illustrates the flow of fuel in interdigitated flow pattern in backward direction, in accordance with an embodiment.
  • the second valve "G” and seventh valve "A” are left open, while all other valves remain closed.
  • second manifold 110c of the second group of manifolds is connected to the inlet 402.
  • first manifold 110a of the first group of manifolds is connected to the outlet 404.
  • an interdigitated flow pattern in backward direction (2) is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 12 illustrates the flow of fuel in interdigitated flow pattern in backward direction, in accordance with an embodiment.
  • a third valve "E” and sixth valve “D” are left open, while all other valves remain closed.
  • second manifold l lOd of the first group of manifolds is connected to the inlet 402.
  • first manifold 110b of the second group of manifolds is connected to the outlet 404.
  • a dead end flow pattern is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 13 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment.
  • the seventh valve A and first valve B are left open, while all other valves remain closed.
  • the first manifold 110a of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the inlet 402. Further, none of the manifolds are connected to the outlet.
  • fuel flow in dead end pattern is established.
  • the fuel from the fuel inlet 402 is supplied to the first manifold 110a of the first group of manifolds and second manifold 110c of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the first valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the second manifold HOd of the first group of manifolds is connected.
  • the fuel from the fuel inlet 402 passes through the seventh valve that is kept open and reaches the second set of channels 202b.
  • a dead end flow pattern is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 14 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment.
  • the first valve B and fifth valve H are left open, while all other valves remain closed.
  • the first manifold 110a of the first group of manifolds and the first manifold 110b of the second group of manifolds are connected to the inlet 402. Further, none of the manifolds are connected to the outlet 404.
  • fuel flow in dead end pattern is established.
  • the fuel from the fuel inlet 402 is supplied to the first manifold 110a of the first group of manifolds and first manifold 110b of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the first valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the second manifold l lOd of the first group of manifolds is connected.
  • the fuel from the fuel inlet 402 passes through the fifth valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the second manifold 110c of the second group of manifolds is connected.
  • a dead end flow pattern is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 15 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment.
  • the seventh valve A and third valve E are left open, while all other valves remain closed.
  • the second manifold l lOd of the first group of manifolds and the second manifold 110c of the second group of manifolds are connected to the inlet 402. Further, none of the manifolds are connected to the outlet 404.
  • fuel flow in dead end pattern is established.
  • the fuel from the fuel inlet 402 is supplied to the second manifold 1 lOd of the first group of manifolds and second manifold 110c of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the third valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the first manifold 110a of the first group of manifolds is connected.
  • the fuel from the fuel inlet 402 passes through the seventh valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the first manifold 110b of the second group of manifolds is connected.
  • a dead end flow pattern is achieved by maintaining the status of the valves as indicated in Table 1.
  • FIG. 16 illustrates the flow of fuel in dead end flow pattern, in accordance with an embodiment.
  • the third valve E and fifth valve H are left open, while all other valves remain closed.
  • the second manifold l lOd of the first group of manifolds and the first manifold 110b of the second group of manifolds are connected to the inlet 402. Further, none of the manifolds are connected to the outlet 404.
  • the fuel from the fuel inlet 402 is supplied to the second manifold l lOd of the first group of manifolds and first manifold 110b of the second group of manifolds.
  • the fuel from the fuel inlet 402 passes through the third valve that is kept open and reaches the first set of channels.
  • the fuel circulates through the first set of channels 202a and reaches the end of the first set of channels 202a to which the first manifold 110a of the first group of manifolds is connected.
  • the fuel from the fuel inlet 402 passes through the fifth valve that is kept open and reaches the second set of channels 202b.
  • the fuel circulates through the second set of channels 202b and reaches the end of the second set of channels 202b to which the second manifold 110c of the second group of manifolds is connected.

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  • Fuel Cell (AREA)

Abstract

L'invention concerne un système destiné à réaliser un motif d'écoulement souhaité dans une pile à combustible. Ce système comprend une paire de collecteur de carburant conçue pour faciliter le débit de carburant, la paire de collecteurs de carburant comprenant un premier groupe et un second groupe de collecteurs de carburant. Il comprend, en outre, un premier ensemble de canaux défini sur une plaque bipolaire et un second ensemble de canaux défini sur la plaque bipolaire. Le premier groupe de collecteurs de carburant consiste en une connexion fluidique avec le premier ensemble de canaux et le second groupe de collecteurs de carburant consiste en une connexion fluidique avec le second ensemble de canaux.
PCT/IN2011/000693 2010-10-04 2011-10-04 Conception de champ d'écoulement dans des piles à combustible WO2012046248A1 (fr)

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IN2762/MUM/2010 2010-10-04
IN2762MU2010 2010-10-04

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WO2012046248A1 true WO2012046248A1 (fr) 2012-04-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103682395A (zh) * 2013-12-24 2014-03-26 大连融科储能技术发展有限公司 一种液流电池电堆及液流电池系统
GB2536706A (en) * 2015-03-27 2016-09-28 Daimler Ag Fuel cell system, vehicle and method for operating a fuel cell system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1265303A1 (fr) * 2000-03-07 2002-12-11 Matsushita Electric Industrial Co., Ltd. Pile a combustible a electrolyte polymere et son procede de fabrication
DE10229820A1 (de) * 2002-06-28 2004-02-05 Deutsches Zentrum für Luft- und Raumfahrt e.V. Gasverteilungsvorrichtung für eine elektrochemische Elektrode und Verfahren zur Reaktionsgasbeaufschlagung einer elektrochemischen Elektrode
US20040091760A1 (en) * 2002-07-04 2004-05-13 Shunsuke Mizutani Fuel cell
EP1439593A2 (fr) * 2003-01-20 2004-07-21 Matsushita Electric Industrial Co., Ltd. Pile à combustible ayant une pluralité de canaux étant controllable indépendamment pour des charges variables
US20050191541A1 (en) * 2004-02-04 2005-09-01 Vladimir Gurau Fuel cell system with flow field capable of removing liquid water from the high-pressure channels

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1265303A1 (fr) * 2000-03-07 2002-12-11 Matsushita Electric Industrial Co., Ltd. Pile a combustible a electrolyte polymere et son procede de fabrication
DE10229820A1 (de) * 2002-06-28 2004-02-05 Deutsches Zentrum für Luft- und Raumfahrt e.V. Gasverteilungsvorrichtung für eine elektrochemische Elektrode und Verfahren zur Reaktionsgasbeaufschlagung einer elektrochemischen Elektrode
US20040091760A1 (en) * 2002-07-04 2004-05-13 Shunsuke Mizutani Fuel cell
EP1439593A2 (fr) * 2003-01-20 2004-07-21 Matsushita Electric Industrial Co., Ltd. Pile à combustible ayant une pluralité de canaux étant controllable indépendamment pour des charges variables
US20050191541A1 (en) * 2004-02-04 2005-09-01 Vladimir Gurau Fuel cell system with flow field capable of removing liquid water from the high-pressure channels

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103682395A (zh) * 2013-12-24 2014-03-26 大连融科储能技术发展有限公司 一种液流电池电堆及液流电池系统
GB2536706A (en) * 2015-03-27 2016-09-28 Daimler Ag Fuel cell system, vehicle and method for operating a fuel cell system

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