WO2023061710A1 - Refroidissement par évaporation d'un refroidisseur à l'aide d'eau produite provenant d'au moins un système de pile à combustible - Google Patents

Refroidissement par évaporation d'un refroidisseur à l'aide d'eau produite provenant d'au moins un système de pile à combustible Download PDF

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Publication number
WO2023061710A1
WO2023061710A1 PCT/EP2022/076157 EP2022076157W WO2023061710A1 WO 2023061710 A1 WO2023061710 A1 WO 2023061710A1 EP 2022076157 W EP2022076157 W EP 2022076157W WO 2023061710 A1 WO2023061710 A1 WO 2023061710A1
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WO
WIPO (PCT)
Prior art keywords
fuel cell
cell system
cooler
product water
water
Prior art date
Application number
PCT/EP2022/076157
Other languages
German (de)
English (en)
Inventor
Jochen Braun
Original Assignee
Robert Bosch Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2023061710A1 publication Critical patent/WO2023061710A1/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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04029—Heat exchange using liquids
    • 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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04059—Evaporative processes for the cooling of a fuel cell
    • 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
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
    • H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
    • 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
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/0432—Temperature; Ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane

Definitions

  • the invention relates to a method for supporting a cooler of a fuel cell system in cooling the fuel cell system. Furthermore, the invention relates to a corresponding device and a corresponding system with a corresponding device.
  • Fuel cell systems are known in principle, also as energy suppliers in vehicles.
  • fuel cell systems i. i.e. R. uses oxygen from the ambient air as the oxidizing agent and hydrogen as the reducing agent or fuel in order to react to form water (or water vapor) in the fuel cell stack of the system and thus to supply electrical power by electrochemical conversion.
  • Another system-inherent property in fuel cell systems is the formation of product water (reaction product of hydrogen and oxygen from the ambient air).
  • Water management plays an important role in the operation of fuel cell systems, e.g. for humidifying membranes, for removing product water from the stack, etc.
  • the cooling system faces considerable challenges Challenges. High coolant temperatures and thus also high stack temperatures in turn cause higher degradation/aging of the fuel cell stack and thus a shorter service life.
  • the invention provides a method for supporting a cooler of a fuel cell system when cooling the fuel cell system with the features of the independent method claim. Furthermore, the invention provides a corresponding device with the features of the independent device claim and a corresponding system with the features of the independent system claim. Further advantages, features and details of the invention result from the dependent claims, the description and the drawings. Features and details that are described in connection with individual aspects of the invention naturally also apply in connection with the other aspects of the invention and vice versa, so that the disclosure of the individual aspects of the invention is or can always be referred to reciprocally.
  • the present invention provides: a method for supporting a cooler of a fuel cell system in cooling the fuel cell system, in particular for cooling the cooler, preferably for increasing the cooling capacity of the cooler, comprising: Providing (or obtaining) product water from the fuel cell system, e.g. by separating it from a cathode exhaust gas path and/or an anode path and preferably storing it in a water storage tank specially provided for this purpose, supplying the product water from the fuel cell system to the cooler, e.g line unit and e.g. B. at least one specially designed pump,
  • Wetting of the at least one cooler with the product water from the at least one fuel cell system in order to cool the at least one cooler by evaporating the product water, e.g. B. is designed for wetting a surface of the cooler and for this purpose, for example.
  • the at least one fuel cell system can preferably be used for mobile applications, e.g. B. be designed in vehicles.
  • the at least one fuel cell system within the meaning of the invention can serve as the main energy supplier for an electric motor of the vehicle.
  • the at least one fuel cell system according to the invention can be used as an energy supplier for an auxiliary drive and/or an auxiliary drive of a vehicle, for example a hybrid vehicle.
  • the at least one fuel cell system for stationary applications such. B. in generator systems, be designed.
  • the at least one fuel cell system can have at least one fuel cell stack (or stack for short) with a plurality of stacked fuel cells.
  • the at least one fuel cell system can have a cathode system for providing an oxygen-containing reactant to the at least one fuel cell stack.
  • Each cathode system can have a supply air line for providing supply air to the at least one fuel cell stack and an exhaust air line for removing exhaust air from the at least one fuel cell stack.
  • the at least one fuel cell system can have an anode system for providing a fuel-containing reactant to the at least one fuel cell stack.
  • the anode system can also have a purge and/or drain system for flushing an anode path and/or for removing product water from the anode path.
  • the purge and/or drain system can also have at least one combined purge and/or drain line (which can also be referred to as a purge and/or drain discharge line) or a separate purge line and drain line each.
  • the purge and drain system can be integrated (one valve and one line) or implemented separately (a purge valve with a purge line and a drain valve with a drain line).
  • the at least one fuel cell system can have a cooling system for controlling the temperature of the at least one fuel cell stack.
  • the cooling system can in turn have at least one or more coolers that can be cooled using the invention.
  • the invention recognizes that the cooling system of a fuel cell system faces challenges associated with limited heat dissipation to the environment. Only the temperature difference between the stack temperature or coolant temperature at the exit from the stack and the ambient temperature is available.
  • the operating strategy can specify a sufficiently high coolant temperature and thus also the stack temperature in order to dissipate the waste heat to the environment.
  • higher stack temperatures result in a significant increase in the degradation/aging of the stack. This in turn leads to a reduction in the service life of the stack and thus also of the overall system.
  • the stack temperature is limited by a permissible limit temperature. If the permissible limit temperature of the stack is reached, then the operating strategy is to carry out derating, ie a power reduction, in order to protect the components of the stack from overheating. However, the power reduction results in a power loss.
  • the inventive idea is that the performance of the cooler and the heat dissipation to the environment - at least temporarily and / or under certain conditions - is improved by wetting the cooler and the resulting evaporative cooling (use of the evaporation enthalpy of the product water).
  • a significant increase in the cooling capacity can be achieved by evaporating the product water.
  • the cooler can be supported as needed and flexibly.
  • the operating mode for evaporative cooling can be intermittent or constant for a specific time.
  • the invention significantly improves the heat dissipation to the environment, even with low temperature differences between the stack temperature or coolant temperature at the exit from the stack and the temperature of the environment.
  • the power reduction or derating can be reduced or even avoided with the aid of the invention.
  • the coolant system can be designed to be compact and operated effectively.
  • one method can provide that when product water is provided from the at least one fuel cell system, the product water from external sources is additionally or alternatively used, in particular by refilling a water storage tank and/or by collecting rainwater. In this way, the availability of the water for cooling the at least one cooler can be improved.
  • a water storage tank is used to provide product water from the at least one fuel cell system, it being possible in particular for the water storage tank to be provided for a plurality of fuel cell systems.
  • the provision of product water from the at least one fuel cell system can be temporally decoupled from the use of the product water for wetting the at least one cooler by means of the water storage tank.
  • the water storage tank can be used to provide a central point for the at least one fuel cell system or for a plurality of fuel cell systems, which can be used to separate water from media streams, to store water from the separated product water and to provide water to the respective cooling system.
  • the water storage tank can make it possible for the product water to be transferred between the individual fuel cell systems.
  • the water storage container can have at least one of the following elements: at least one line connection for one or each exhaust air line for discharging an exhaust air from a cathode system of the at least one fuel cell system, one, in particular exclusively one, line outlet for discharging media flows from the water storage container, and in particular exclusively one, preferably controllable and/or adjustable, shut-off device for draining product water from the water storage tank, and/or at least one line connection for one or each purge and/or drain line of an anode system of the at least one fuel cell system.
  • the water storage tank can be designed in the form of a central point for the at least one fuel cell system or for several fuel cell systems, which can serve to separate water from media flows, to store water from the separated product water and to provide water to the respective cooling system.
  • the shut-off device can advantageously enable a controllable and/or regulatable use of the product water.
  • the purge and/or drain fluid mixture of different fuel cell systems can be diluted with a combined cathode exhaust air.
  • At least one line unit is used to supply the product water from the at least one fuel cell system to the cooler.
  • the product water occurring in the system can be routed over spatial distances.
  • the installation space in the at least one fuel cell system can be designed and used in a flexible manner.
  • At least one pump is used to supply the product water from the at least one fuel cell system to the cooler.
  • the product water can be fed to the at least one cooler at a required pressure.
  • the at least one pump can be provided as part of a line unit and/or as part of a water storage tank.
  • an atomization unit is used to wet the at least one cooler with the product water from the at least one fuel cell system.
  • the at least one cooler can be wetted with a film of water in order to enable cooling of the cooler using evaporative cooling.
  • the atomizing unit can have at least one active or passive nozzle.
  • the atomization unit can preferably be designed in such a way that a surface of the cooler is evenly wetted with the product water.
  • the atomization unit can have at least one rail structure, which can be embodied in the form of a lattice, frame and/or ring.
  • the steps of the method are carried out at different times from one another.
  • the provision of product water and the wetting of the at least one cooler with the product water can be carried out at different times.
  • the processes for collecting product water can be placed at the operating points of the fuel cell system that are favorable for this purpose, for example during cooling
  • a method can provide for the method to be controlled, in particular triggered and/or started and/or ended, depending on a heat removal requirement at the at least one cooler, which requires additional cooling capacity due to evaporation of the product water.
  • the cooling of the at least one cooler can be switched on in a targeted manner by evaporating the product water if the actual cooling capacity of the cooler is not sufficient to sufficiently cool the fuel cell system.
  • This can be particularly advantageous in situations where heat dissipation to the environment is limited. i.e. in situations where there is not a sufficient temperature difference between the stack temperature or coolant temperature at the exit from the stack and the ambient temperature. In this way, reliable cooling of the fuel cell system can be ensured even under unfavorable conditions.
  • Operating parameters of the at least one fuel cell system and/or the at least one cooler in particular a stack temperature of the at least one fuel cell system and/or coolant temperature, preferably at an outlet from a stack of the at least one fuel cell system,
  • Ambient parameters in particular including: temperature, pressure, humidity, wind speed, Performance requirement for the at least one fuel cell system, in particular including: high-load operation, full-load operation, - operating parameters of a fan of the at least one cooler, in particular including: speed, operating mode, such as. B. sucking or pushing, rotor blade setting position,
  • Vehicle parameters in particular including: speed, acceleration, payload,
  • Route parameters in particular including: incline, traffic situation, route planning, navigation, prediction horizon, and/or
  • Water storage parameters in particular comprising: filling level, thermodynamic and/or chemical state of the product water.
  • the method can advantageously be carried out intermittently or continuously, and in particular adaptively.
  • the intermittent control mode can have at least one of the following types of control: time-controlled, temperature-controlled, parameter-controlled, and/or event-controlled.
  • Evaporative cooling can be provided, at least over a period of time.
  • Evaporative cooling can be provided intermittently to allow time for the evaporation process after product water has been applied to the at least one cooler (evaporation before further product water is applied) and/or in the event of a recurring performance requirement of the system.
  • the method can be time-controlled, temperature-controlled, parameter-controlled and/or event-controlled.
  • the use of the product water can be optimized so that not too much product water is provided and/or that no excess water is produced, preferably that only the surface of the cooler and only so much is wetted that the product water used can evaporate completely.
  • the method can have at least one of the following steps:
  • the present invention provides: a device for supporting at least one cooler of at least one fuel cell system when cooling the at least one fuel cell system, preferably for increasing the cooling capacity of the cooler, which is specially developed for carrying out a method as described above can run, having:
  • Water storage tank for providing product water from the at least one fuel cell system
  • Line unit for supplying the product water from the at least one fuel cell system to the cooler.
  • Atomization unit for wetting the at least one cooler with the product water from the at least one fuel cell system in order to cool the at least one cooler by evaporating the product water.
  • the present invention provides: a system comprising: at least one fuel cell system, at least one cooler for the at least one fuel cell system, and a device, in particular a common device, for supporting the at least one cooler when cooling the at least one fuel cell system, in particular for cooling the radiator, preferably to increase the cooling capacity of the radiator.
  • FIG. 1 shows a schematic side view and front view of a possible device for supporting at least one cooler of at least one fuel cell system when cooling the at least one fuel cell system
  • FIG. 2 shows a schematic front view of another possible device for supporting at least one cooler of at least one fuel cell system when cooling the at least one fuel cell system
  • FIG. 3 shows a schematic front view of another possible device for supporting at least one cooler of at least one fuel cell system when cooling the at least one fuel cell system
  • FIG. 4 shows a schematic side view of a possible device for supporting a high-temperature cooler and a low-temperature cooler of at least one fuel cell system when cooling the at least one fuel cell system
  • FIG. 5 shows a schematic side view of a possible device for supporting a high-temperature cooler, a medium-temperature cooler and a low-temperature cooler of at least one fuel cell system when cooling the at least one fuel cell system, and
  • FIG. 6 shows an exemplary sequence of a method for supporting at least one cooler of at least one fuel cell system when cooling the at least one fuel cell system.
  • FIGS. 1 to 5 serve to explain the idea according to the invention, according to which a method for supporting a cooler 101 of a fuel cell system 100 in cooling the fuel cell system 100 is provided.
  • the method serves to cool the cooler 101 or to increase the cooling capacity of the cooler 101.
  • the method can be carried out using one of the devices shown in FIGS.
  • Wetting the at least one cooler 101 with the product water from the at least one fuel cell system 100 in order to cool the at least one cooler 101 by evaporating the product water, e.g. B. is designed for wetting a surface of the cooler 101 and for this purpose, for example.
  • Several passive and / or active nozzles 15 can have.
  • the at least one fuel cell system 100 is shown only schematically in FIGS.
  • the at least one fuel cell system 100 can preferably be used for mobile applications, e.g. B. in vehicles. But also a use for stationary applications, e.g.
  • the at least one fuel cell system 100 can have a cooling system 20 for tempering the at least one fuel cell stack.
  • the cooling system 20 can in turn have at least one cooler 101 (see Figures 1 to 3) or a plurality of coolers 101 (see Figures 4 and 5), which can be cooled using the invention and thus the cooling system 20 when cooling the at least one fuel cell system 100 support.
  • the invention recognizes that the cooling systems 20 of fuel cell systems 100, which have operating temperatures comparable to the ambient temperatures, face major challenges since the heat dissipation to the environment is limited in such fuel cell systems 100. Only the temperature difference between the stack temperature or coolant temperature at the exit from the stack and the ambient temperature is available. If this temperature difference is low, the cooling systems 20 can only provide a limited cooling capacity.
  • a sufficiently high coolant temperature and thus also a correspondingly high stack temperature can be specified in order to dissipate the waste heat to the environment.
  • higher stack temperatures have the disadvantage that the stack is subject to significant degradation/aging, which considerably shortens the service life of the stack and thus also of the entire system.
  • the stack temperature must be limited by a permissible limit temperature.
  • a permissible limit temperature of the stack When the permissible limit temperature of the stack is reached, such fuel cell systems 100 have to be derated, i.e. the power is reduced, in order to protect the components of the fuel cell systems 100 from overheating. The power reduction results in an immediate loss of power.
  • the idea of the invention is to improve the performance of the cooler 101 and thus the heat dissipation to the environment - at least temporarily and/or under certain conditions - by wetting the cooler 101 with the product water from the at least one fuel cell system 100 and by evaporative cooling using the enthalpy of vaporization of the to increase product water.
  • a significant increase in the cooling capacity can be achieved by evaporating the product water.
  • the cooler 101 can be supported flexibly as required.
  • the operating mode for evaporative cooling can be intermittent or constant for a specific time.
  • the operating mode for evaporative cooling can also be adjusted adaptively to specific conditions.
  • the heat dissipation to the environment can be significantly improved, even with low temperature differences between the stack temperature or coolant temperature at the exit from the stack and the temperature of the environment.
  • the service life of the stack and thus also of the entire fuel cell system 100 can be extended considerably.
  • the power reduction or derating during operation of the fuel cell system 100 can be reduced or even avoided with the aid of the invention.
  • the coolant system 20 can be designed to be compact and operated effectively with the aid of the invention. Reliable provision of drive energy can be ensured with the aid of the invention even in vehicles with a high payload and with high performance requirements and possibly low speeds.
  • the product water can be obtained from a cathode exhaust air line and/or an anode path of the at least one fuel cell system 100.
  • the product water from external sources can be used additionally or alternatively, for example by refilling a water storage tank and/or by collecting rainwater.
  • a water storage container 11 can preferably be used in step 201 .
  • the water storage tank 11 allows the obtaining of product water in step 201 to be temporally decoupled from the use of the product water for wetting the at least one cooler 101 in step 203 .
  • the water storage tank 11 for the at least one fuel cell system 100 or for several Fuel cell systems 100 can be provided.
  • a central point for the at least one fuel cell system 100 or for a plurality of fuel cell systems 100 can advantageously be provided, which can serve to separate water from media flows, to store water from the separated product water and to provide water to the respective cooling system 20.
  • the water storage tank 11 can advantageously make it possible for the product water to be transferred between the individual fuel cell systems 100 .
  • the product water that occurs in one fuel cell system 100 can be used in another fuel cell system 100 .
  • the water storage tank 11 is not shown with all the details merely for reasons of simplicity.
  • the water storage tank 11 can have the following elements, for example: at least one line connection for one or each exhaust air line for discharging an exhaust air from a cathode system of the at least one fuel cell system 100, one, in particular exclusively one, line outlet for discharging media flows from the water storage tank 11, and in particular exclusively one, preferably controllable and/or regulatable, shut-off device for draining product water from the water storage tank 11, and/or at least one line connection for one or each purge line and/or drain line of an anode system of the at least one fuel cell system 100.
  • the non-illustrated shut-off device can advantageously enable a controllable and/or regulatable use of the product water.
  • the water storage container 11 can make it possible for the purge and/or drain fluid mixture of different fuel cell systems 100 to be diluted with a combined cathode exhaust air. In principle, however, it is also conceivable that steps 201 to 203 can be implemented without a water storage tank 11 .
  • FIGS. 1 to 5 indicate that in step 202 at least one line unit 12 can be used.
  • step 202 at least one pump 14 can be used.
  • the at least one pump 14 can be provided as part of the line unit 12 and/or as part of the water storage tank 11 .
  • FIGS. 1 to 5 show that in step 203 an atomization unit 13 can be used.
  • the atomizing unit 13 can have several active or passive nozzles 15 as required.
  • the atomization unit 13 can be designed to uniformly wet a surface O of the cooler 101 with the product water.
  • the atomization unit 13 can have at least one rail structure R, which can be embodied in the form of a grid (cf. FIGS. 1 and 2), in the form of a frame (cf. FIG. 3) and/or in the shape of a ring.
  • the method is controlled, in particular triggered and/or started and/or ended, depending on a heat removal request to the at least one cooler 101, which requires additional cooling capacity due to evaporation of the product water. Consequently, the cooling of the at least one cooler 101 can be switched on in a targeted manner by evaporating the product water if the at least one cooler 101 has to be supported. This is particularly advantageous in situations in which the heat dissipation to the environment is limited or in which there is not a sufficient temperature difference between the stack temperature or coolant temperature at the exit from the stack and the temperature of the environment. In this way, reliable cooling of the fuel cell system 100 can be ensured even under unfavorable conditions.
  • At least one of the following parameters can be taken into account to determine whether there is a heat removal requirement that requires additional cooling capacity through evaporation of the product water:
  • Operating parameters of the at least one fuel cell system 100 and/or the at least one cooler 101 in particular a stack temperature of the at least one fuel cell system 100 and/or coolant temperature, preferably at an outlet from a stack of the at least one fuel cell system 100,
  • Ambient parameters in particular including: temperature, pressure, humidity, wind speed,
  • Power demand on the at least one fuel cell system 100 in particular including: high-load operation, full-load operation,
  • Operating parameters of a fan of the at least one cooler 101 in particular including: speed, operating mode, such as. B. sucking or pushing, rotor blade setting position,
  • Vehicle parameters in particular including: speed, acceleration, payload,
  • Route parameters in particular including: incline, traffic situation, route planning, navigation, prediction horizon, and/or
  • Water storage parameters in particular comprising: filling level, thermodynamic and/or chemical state of the product water.
  • the method can be carried out intermittently or continuously, and in particular adaptively.
  • the intermittent control operation can be carried out, for example: time-controlled, temperature-controlled, parameter-controlled and/or event-controlled.
  • permanent evaporative cooling can be provided, at least over a period of time.
  • the evaporative cooling can be provided intermittently. The process can be time-controlled, temperature-controlled, parameter-controlled and/or event-controlled.
  • the flexible and preferably adaptive control of the process can optimize the use of the product water. In this way, it can be ensured that not too much product water is provided or that there is no excess water, so that only the surface of the at least one cooler 101 is wetted and only so much that the product water used can evaporate as completely as possible.
  • the method can have at least one of the following steps:
  • the invention provides: a device 10 for supporting at least one cooler 101 of at least one fuel cell system 100 in cooling the at least one fuel cell system 100, preferably for increasing the cooling capacity of the cooler 10, specifically for carrying out a method is developed, which can proceed as described above, comprising:
  • Water storage tank 11 for providing product water from the at least one fuel cell system 100
  • Line unit 12 for supplying the product water from the at least one fuel cell system 100 to the cooler 101.
  • Atomization unit 13 for wetting the at least one cooler 101 with the product water from the at least one fuel cell system 100 in order to cool the at least one cooler 101 by evaporation of the product water.
  • FIG. 1 shows a schematic side view and front view of a possible device 10.
  • An arrangement of the cooler 101 is shown in which a fan F has a suction effect, ie in the direction of the air flow L shown schematically with the arrows.
  • the spray-generating nozzles 15 (here for example nine) within the scope of the atomization unit 13 are supplied with product water at sufficient pressure via a lattice-shaped rail structure R in order to achieve sufficiently fine spray formation and thus the largest possible and most uniform wetting of the surface O of the at least one cooler 101.
  • a high-temperature cooler 101 or HT cooler 101 or high-temperature circuit cooler 101 can be used as the at least one cooler 101, to which the cooling circuit of the fuel cell system 100 is usually connected.
  • Figure 2 shows a schematic front view of a possible device 10 with a different arrangement of spray-generating nozzles 15 (here, for example, two) in comparison to Figure 1 in the atomization unit 13 and the water supply via a lattice-shaped rail structure R. It is also indicated that different Cooler 101 can be connected to the device 10.
  • Figure 3 shows a schematic front view of a possible device 10 with a different arrangement of the spray-generating nozzles 15 (here, for example four) in the context of the atomization unit 13 and the water supply via a frame-shaped rail structure R than in Figure 1.
  • the product water can also be used here for several coolers 101 with corresponding arrangements of nozzles 15 and corresponding rail structures R for supporting the cooler 101 can be used.
  • FIG. 4 shows a schematic side view of a possible device 10 with an additional low-temperature or LT cooler 101 compared to FIG.
  • the device 10 according to the invention is used here for the high-temperature cooler 101 . If the low-temperature cooler 101 is also to be relieved of water evaporation, nozzles 15 for spray formation can also be arranged in front of the low-temperature cooler 101 upstream of the air flow L.
  • FIG. 5 shows a schematic side view of a possible device 10 with an additional low-temperature or LT cooler compared to FIG 101 and medium-temperature or MT coolers.
  • the arrangement with three coolers 101 can cover three cooling circuits with three different temperature levels.
  • the idea according to the invention can be transferred accordingly.
  • the HT cooler 101 and the LT cooler 101 are supported directly and the MT cooler 101 indirectly by the device 10 according to the invention in order to increase the heat dissipation from the corresponding cooling circuit to the environment or ambient air L.
  • the positions LI, L2, L3 for the arrangement of nozzles 15 for spray formation come into consideration for a suction arrangement of the fan F. If the fan F is used in a pushing manner or the air flow L is reversed, then the positions L4, LI, L2 come into play for the arrangement of nozzles 15 for spray formation into consideration.
  • the present invention provides according to the second aspect: a system 110 having at least one fuel cell system 100, at least one cooler 101 for the at least one fuel cell system 100, and one, in particular a common, device 10 for supporting the at least one cooler 101 in cooling the at least one fuel cell system 100, in particular for cooling the cooler 10, preferably for increasing the cooling capacity of the cooler 10.

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Abstract

L'invention concerne un procédé pour assister au moins un refroidisseur (10) d'au moins un système de pile à combustible (100) lors du refroidissement du ou des systèmes de piles à combustible (100), comprenant les étapes consistant : à prendre de l'eau produite provenant du ou des systèmes de piles à combustible (100), à amener l'eau produite provenant du ou des systèmes de piles à combustible (100) jusqu'au refroidisseur (101), à mouiller le ou les refroidisseurs (101) avec l'eau produite provenant du ou des systèmes de piles à combustible (100) pour refroidir le ou les refroidisseurs (101) par évaporation de l'eau produite.
PCT/EP2022/076157 2021-10-14 2022-09-21 Refroidissement par évaporation d'un refroidisseur à l'aide d'eau produite provenant d'au moins un système de pile à combustible WO2023061710A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200044264A1 (en) * 2018-08-01 2020-02-06 Toyota Jidosha Kabushiki Kaisha Fuel cell system
DE102019210626A1 (de) * 2019-07-18 2021-01-21 Robert Bosch Gmbh Kühlsystem für einen Brennstoffzellen-Stack
WO2022171402A1 (fr) * 2021-02-15 2022-08-18 Man Truck & Bus Se Refroidissement par évaporation pour un véhicule à moteur avec entraînement de pile à combustible

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200044264A1 (en) * 2018-08-01 2020-02-06 Toyota Jidosha Kabushiki Kaisha Fuel cell system
DE102019210626A1 (de) * 2019-07-18 2021-01-21 Robert Bosch Gmbh Kühlsystem für einen Brennstoffzellen-Stack
WO2022171402A1 (fr) * 2021-02-15 2022-08-18 Man Truck & Bus Se Refroidissement par évaporation pour un véhicule à moteur avec entraînement de pile à combustible

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