Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
  • F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
• • 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
  • H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
  • F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
  • F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
  • F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
  • F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
  • F04F5/48—Control
  • F04F5/52—Control of evacuating pumps
• • 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
  • H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
• • 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

• the present invention relates to a fuel delivery device for delivering fuel for a fuel cell system, a fuel cell system and a method for operating a fuel delivery device for delivering fuel for a fuel cell system.
• the fuel for example hydrogen
• the fuel cell can usually be provided for an anode circuit of the fuel cell.
• the anode circuit is designed to supply the anode side of the fuel cell or the fuel cell stack with a first gas, which can then cause a reaction in the fuel cell.
• the hydrogen can also be circulated via an ejector pump and/or a recirculation fan.
• the ejector pump can cover an upper load range and the recirculation fan a lower load range.
• a combination of circular circulation and fresh feed may be possible, but the two conveying methods also influence each other, since they are usually operated in series with one another (connected).
• DE 112006003013 B4 describes a tank with a fitting and a valve, the valve being fixed in the fitting.
• the present invention provides a fuel delivery device for delivering a fuel for a fuel cell system according to claim 1, a fuel cell system according to claim 10, and a method for operating a fuel delivery device for delivering a fuel for a fuel cell system according to claim 11.
• the idea on which the present invention is based is to specify a fuel delivery device for delivering fuel for a fuel cell system, a fuel cell system and a method for operating a fuel delivery device for delivering fuel for a fuel cell system, with parallel operation of a circulation delivery of the fuel and a delivery of the fuel can be operated from one tank and mutual influencing of direct funding and circulation funding can be reduced by parallel operation.
• the fuel delivery device for delivering a fuel for a fuel cell system comprises a first delivery path for the fuel with a first delivery device; a second conveying path for the fuel with a second conveying device; an opening area in which the first conveying path and the second conveying path open into one another; and a common outlet opening for the fuel, which connects to the mouth area and through which the fuel can be delivered to a fuel cell.
• the fuel can be gaseous, for example, although it is also possible to pump a liquid fuel.
• the first conveying path and/or the second conveying path can each or both comprise a pipe or a hose which can end in an end piece which can comprise the mouth region and the outlet opening.
• the word “fuel” can be understood broadly as an agent or component of a substance for powering a fuel cell, such as an anode side of a fuel cell. However, it is also possible to align the same system with a cathode side of the fuel cell.
• the fuel cell can be an individual fuel cell or a fuel cell stack.
• the conveying action can include different methods, for example pumping or suction jet conveying.
• Two conveying paths running in parallel can be operated by the respective conveying devices and depending on the specification in different operating modes, for example depending on the performance of the fuel cell and the necessary conveyance of fresh and/or recirculated fuel, advantageously controlled in parallel and only brought together in the mouth area .
• the mouth area can be located directly in front of the exit opening.
• the first conveying path and/or the second conveying path and their components can each be formed as modules.
• the fuel delivery device can be used, for example, for all fuel cell systems with a hydrogen metering valve and recirculation or also for other types of fuel for fuel cell systems.
• the first delivery device comprises a metering valve and/or a suction jet pump.
• the fuel advantageously hydrogen
• the fuel can be supplied to the fuel cell in a high load and/or power range via the metering valve and the ejector pump, since a sufficiently high volume flow of the fuel can be achieved through the first delivery path with the ejector pump.
• the first delivery path can be connected to an external fuel tank.
• the first conveying path can thus convey the fuel from the external fuel tank to the fuel cell and thus to the fuel cell system.
• the second delivery device comprises a recirculation pump.
• the second delivery path can circulate the fuel from the fuel cell and back to it, advantageously in a low load and/or power range alone or in support of the first delivery path.
• the recirculation pump may include a recirculation fan.
• the second delivery path can be connected to a fuel cell as a circuit for the fuel. According to a preferred embodiment of the fuel delivery device, it is set up to deliver liquid or gaseous hydrogen as fuel.
• the pumps, lines, seals and valves on the conveying paths can be designed accordingly.
• the mouth area includes a reed valve with which the first delivery path and/or the second delivery path can be at least partially closed in the mouth area by a pressure applied in the corresponding other delivery path.
• the reed valve can include a flap which can at least partially or completely close an outlet of the first conveying path and/or the second conveying path in the mouth area and can interrupt the exit of the fuel from this conveying path.
• the reed valve comprises a spring with which the reed valve can be prestressed in a rest position, below which the first delivery path or the second delivery path is closed.
• the resting position can be chosen such that in the resting position no opposing force acts on the reed valve and the reed valve can be held by the spring in such a way that the reed valve either completely or only partially closes one of the conveying paths.
• the first delivery path is set up to be operated in an upper load range of the fuel cell system and the second delivery path is set up to be operated in a lower load range of the fuel cell system, the lower load range and the upper load range being completely different or an overlapping range of values have, wherein the first conveying path and / or the second conveying path are operable parallel to each other.
• the first conveying path can be operated in an upper load range and the second conveying path can be operated in a lower load range.
• the load ranges can be separated at 50% of the load (power operation) on the fuel cell, in other words below 50% can mean a lower load range and from/over 50% an upper load range.
• the two delivery units can be connected in series, in which case a transition between the load ranges (operation under the respective load range) can be smooth.
• the overlapping value range can exist when the fuel cell and the fuel delivery device are operated at part load.
• the fuel cell system comprises a fuel cell and a fuel delivery device according to the invention.
• a fuel delivery device for delivering a fuel and connecting the fuel delivery device to a fuel cell is provided; detecting a need to deliver the fuel from a fuel tank and/or from the fuel cell and then delivering the fuel to the fuel cell by means of the first delivery path with a first delivery device; and/or recognizing a need for conveying the fuel from the fuel cell in a circuit and then conveying the fuel in the circuit by means of the second conveying path with a second conveying device; and releasing the fuel via a common outlet opening for the fuel, which connects to the orifice area and through which the fuel is released to the fuel cell.
• the necessity can be detected via sensors or knowledge of the operating mode of the fuel cell, for example from a conclusion about the currently operated power range/load range of the fuel cell.
• the first conveying path can thus convey the fuel externally from a tank and/or from an inlet of a recirculation of the fuel cell itself.
• the method can advantageously also be characterized by the already mentioned features of the fuel delivery device and/or the fuel cell system and vice versa.
• FIG. 1 shows a schematic illustration of a fuel delivery device for delivering a fuel for a fuel cell system according to an exemplary embodiment of the present invention
• FIG. 2 shows a schematic illustration of a fuel delivery device for delivering a fuel for a fuel cell system according to a further exemplary embodiment of the present invention
• FIG. 3 shows a schematic illustration of a fuel delivery device for delivering a fuel for a fuel cell system according to a further exemplary embodiment of the present invention.
• Fig. 4 is a block diagram of method steps of a method for operating a fuel delivery device for delivering a fuel for a fuel cell system according to an embodiment of the present invention.
• FIG. 1 shows a schematic representation of a fuel delivery device for delivering a fuel for a fuel cell system according to an exemplary embodiment of the present invention.
• the fuel delivery device 10 for delivering a fuel for a fuel cell system comprises a first delivery path F1 for the fuel with a first delivery device FEI; a second delivery path F2 for the fuel with a second delivery device FE2; an opening area MB, in which the first conveying path F1 and the second conveying path F2 open into one another; and a common outlet opening AO for the fuel, which connects to the mouth area MB and through which the fuel can be delivered to a fuel cell.
• the first delivery device FEI can include a metering valve DV and/or an ejector pump SP.
• the first conveying path Fl can be connected to an external fuel tank.
• the second delivery device FE2 can include a recirculation pump RP and the second delivery path F2 can be connected to a fuel cell as a circuit for the fuel.
• the fuel delivery device 10 with its components can be designed to deliver liquid or gaseous hydrogen as fuel.
• the mouth area MB can include a reed valve FV, with which the first conveying path F1 and/or the second conveying path F2 can be at least partially closed in the mouth area MB by a pressure present in the corresponding other conveying path.
• the reed valve FV can include a spring F, with which the reed valve FV can be pretensioned in a rest position, under which the first delivery path F1 or the second delivery path F2 can be closed.
• the fuel delivery device 10 can be included in a fuel cell system with a fuel cell, for example in the form of an anode module of the fuel cell system.
• FIG. 1 shows a case in which only the second delivery path F2 is active and the fuel (arrow representation) is delivered by the recirculation pump RP, in particular in a circular circulation back to the fuel cell (anode).
• the reed valve FV is opened in such a way that the second conveying path F2 is completely open at the mouth area MB and the first conveying path F1 is completely closed.
• the first delivery device FEI can be switched off and not deliver any fuel from a tank.
• the reed valve can be in an upper stop and close the first delivery path Fl and can thus cause a pneumatic short circuit (delivered Prevent or at least reduce anode gas flows through the fuel cell (stack) and not backwards through the ejector pump (or through the first conveying path). In this case, the lowest load can therefore be applied to the fuel cell.
• the reed valve can be biased for this purpose or not, wherein a bias can apply a lower force than the pressure from the second conveying path and thus the reed valve can be pressed onto the opening of the first conveying path, or can be biased in such a way as to reach this position when the pressure from the first conveying path is removed.
• FIG. 2 shows a schematic representation of a fuel delivery device for delivering a fuel for a fuel cell system according to a further exemplary embodiment of the present invention.
• FIG. 2 shows the fuel delivery device 10 from FIG. 1, although the first delivery path F1 can also be active, with the fuel delivery device 10 and the fuel cell being able to be operated under partial load, i.e. under a load that can be less than full load and can therefore also be partially operated with the first conveying path.
• the metering valve DV can admit a specific quantity of fuel per unit of time into the first delivery path Fl and the ejector pump SP can generate this volume flow of the fuel, with the fuel being admitted externally from a fuel tank and/or also from the recirculation path of the fuel cell can, i.e. gas already in the system.
• the supply via the circulation path can take place via a hole to the first conveying path.
• 2 shows an inlet from the fuel cell, which opens into the second delivery path F2 and can also open into the first delivery path F1 through a hole in the area of the metering valve DV and/or the ejector pump. 1 can also be designed, but the hole can be closed there, for example by an actuator.
• Both paths can also be operated in parallel in the solution of FIG. 2 described here, i.e. the transition area between the upper and lower load range is fluid. Ultimately, it depends on the design of the components (modular system) and the operating strategy where the limit is drawn.
• the fuel cell can be operated under partial load, in other words less than under full load.
• the reed valve FV can then assume an intermediate position between the first and the second conveying path, for example determined by which of the volume flow from the first conveying path and from the second conveying path predominates and in which relation to one another. For example, if both flows are the same, the reed valve FV can be located exactly in the middle position between the outlet of the first conveying path F1 and the outlet of the second conveying path F2, for example at an angle bisector of the movement space of the reed valve FV. In this middle position, the reed valve can also be preloaded.
• the recirculation pump RP can be connected in parallel with the ejector pump SP.
• the pressure-side merging can take place in the opening area MB through the reed valve FV.
• the reed valve can be spring-loaded to define a clear rest position. Under partial load, the reed valve FV flutters in the position that results from the different mass flows. In partial load, when both delivery paths can be in use, the reed valve looks for a position that corresponds to the ratio of the two mass flows. The position and the flutter behavior can be adjusted by the spring.
• FIG. 3 shows a schematic illustration of a fuel delivery device for delivering a fuel for a fuel cell system according to a further exemplary embodiment of the present invention.
• the first delivery path can also use the fuel from the circulation (in addition to fresh fuel from the tank, in this case a feed line from the fuel cell can be connected to the metering valve DV and metered into the first delivery path through the metering valve DV and pumped out by the ejector pump SP in be driven into the first conveying path Fl).
• a feed line from the fuel cell can be connected to the metering valve DV and metered into the first delivery path through the metering valve DV and pumped out by the ejector pump SP in be driven into the first conveying path Fl).
• FIG. 4 shows a block diagram of method steps of a method for operating a fuel delivery device for delivering fuel for a fuel cell system according to an exemplary embodiment of the present invention.
• a fuel delivery device In the method for operating a fuel delivery device for delivering fuel for a fuel cell system, a fuel delivery device according to the invention is provided S1 and the fuel delivery device is connected to a fuel cell; a detection S2 of a need to deliver the fuel from a fuel tank and then delivering S3 the fuel from the fuel tank to the fuel cell by means of the first delivery path with a first delivery device; and/or a detection S4 of a need to convey the fuel from the fuel cell in a circuit and then conveying S5 the fuel in the circuit by means of the second conveying path with a second conveying device; and a discharge S6 of the fuel via a common outlet opening for the fuel, which connects to the mouth area and through which the fuel is discharged to the fuel cell.

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• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Sustainable Development (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Fluid Mechanics (AREA)
• Manufacturing & Machinery (AREA)
• General Chemical & Material Sciences (AREA)
• Electrochemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Chemical & Material Sciences (AREA)
• Sustainable Energy (AREA)
• Fuel Cell (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=78294015

Family Applications (1)

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• 2020
  • 2020-11-13 DE DE102020214316.1A patent/DE102020214316A1/de active Pending
• 2021
  • 2021-10-21 KR KR1020237019281A patent/KR20230104687A/ko unknown
  • 2021-10-21 EP EP21794584.9A patent/EP4244918A1/de not_active Withdrawn
  • 2021-10-21 WO PCT/EP2021/079194 patent/WO2022100978A1/de active Application Filing
  • 2021-10-21 CN CN202180076700.7A patent/CN116636054A/zh active Pending

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