CN115342863A - Performance test system and test method for fuel cell separation ejector - Google Patents

Performance test system and test method for fuel cell separation ejector Download PDF

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Publication number
CN115342863A
CN115342863A CN202211027460.4A CN202211027460A CN115342863A CN 115342863 A CN115342863 A CN 115342863A CN 202211027460 A CN202211027460 A CN 202211027460A CN 115342863 A CN115342863 A CN 115342863A
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communicated
fuel cell
test
valve
humidifier
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罗马吉
李建保
陈云
高晨
曾屹鼎
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • 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
    • 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
    • H01M8/04104—Regulation of differential pressures
    • 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
    • H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • H01M8/04126—Humidifying
    • 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
    • H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
    • H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
    • H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
    • 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
    • H01M8/04291—Arrangements for managing water in solid electrolyte fuel cell systems
    • 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
    • H01M8/04328—Temperature; Ambient temperature of anode reactants at the inlet or inside the 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
    • H01M8/0438—Pressure; Ambient pressure; Flow
    • H01M8/04388—Pressure; Ambient pressure; Flow of anode reactants at the inlet or inside the 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
    • H01M8/04492—Humidity; Ambient humidity; Water content
    • H01M8/045—Humidity; Ambient humidity; Water content of anode reactants at the inlet or inside the 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
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04955—Shut-off or shut-down of fuel cells
    • 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
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
    • 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

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fuel Cell (AREA)

Abstract

The invention discloses a performance test system and a test method of a fuel cell separation ejector, belonging to the technical field of fuel cells; it includes: the separation ejector still includes: the gas circulation pipeline comprises an input port, a front test unit, a simulation galvanic pile system, a rear test unit and an output port which are sequentially communicated from top to bottom; the input port is communicated with the diffusion chamber, and the output port is communicated with the air inlet; the simulated galvanic pile system comprises a humidifier for improving humidity and a fine adjustment valve for releasing hydrogen, and the humidifier and the fine adjustment valve are respectively communicated with a pipeline; the front test unit and the rear test unit can test the temperature, pressure, humidity and flow of the gas; and two ends of the water circulation pipeline are respectively communicated with the water outlet and the humidifier. The invention can test the performance of the separation ejector, simulate the actual environment of the galvanic pile more truly, and has simple test flow and accurate test result.

Description

Performance test system and test method for fuel cell separation ejector
Technical Field
The invention relates to the technical field of fuel cells, in particular to a performance test system and a test method of a fuel cell separation ejector.
Background
The ejector and the steam-water separator in the hydrogen circulation system of the fuel cell engine are used as important functional elements, and the ejector and the steam-water separator play an important role in improving the utilization rate of hydrogen and the efficiency of a fuel cell system. The injection and separation integrated design of the fuel cell integrating the two is capable of effectively saving space, realizing hydrogen injection circulation and water-vapor separation in a large power range, and greatly reducing the cost of key parts of the fuel cell, thereby remarkably reducing the cost of a fuel cell engine and overcoming the obstacle of high cost in the commercialization of the fuel cell.
The invention with the patent number of 202221928320X discloses an ejector capable of separating steam and water, which comprises the following components: the device comprises a shell, a steam-water separation assembly and an injection assembly, wherein the steam-water separation assembly and the injection assembly are arranged in the shell; the steam-water separation assembly comprises a first separation cavity, a second separation cavity and a reservoir, wherein the first separation cavity, the second separation cavity and the reservoir are communicated with each other, a flow baffle plate for separating liquid water is arranged in the first separation cavity, and a rotational flow blade fixedly connected with the shell is arranged in the second separation cavity and can drive airflow to rotate; the reservoir is respectively communicated with the lower parts of the first separation cavity and the second separation cavity so as to collect liquid water; one end of the first separation cavity is provided with an air inlet communicated with the outside, one end of the second separation cavity is provided with a communication port, the communication port is communicated with the injection assembly, and the injection assembly can guide secondary airflow from the communication port to the fuel cell.
In order to distinguish the ejector capable of separating the steam and the common ejector conveniently, the ejector capable of separating the steam and the common ejector is named as the separating ejector, an existing ejector testing system is difficult to test the separating ejector, the ejector testing system is not mutually adaptive, the condition parameters under various working conditions cannot be reduced better in the testing process, and the performance of the separating ejector cannot be evaluated accurately.
Disclosure of Invention
In view of the above, a performance testing system and a testing method for a fuel cell separation ejector are needed to solve the problem of lacking a performance testing system and a testing method for a separation ejector integrated with a steam-water separator and an ejector.
The invention provides a performance test system and a test method of a fuel cell separation ejector, wherein the performance test system comprises a separation ejector, the separation ejector comprises a spray inlet for inputting primary air flow, an air inlet for inputting secondary air flow, a water outlet for discharging steam and water, and a pressure expansion chamber, and the performance test system further comprises:
the gas circulation pipeline comprises an input port, a front test unit, a simulation galvanic pile system, a rear test unit and an output port which are sequentially communicated from top to bottom; the input port is communicated with the diffusion chamber, and the output port is communicated with the air inlet; the simulation electric pile system comprises a humidifier for improving the humidity of hydrogen in the simulation electric pile and a fine adjustment valve for releasing the hydrogen, and the humidifier and the fine adjustment valve are respectively communicated with a pipeline; the front test unit and the rear test unit can test the temperature, pressure, humidity and flow of the gas;
and the two ends of the water circulation pipeline are respectively communicated with the water outlet and the humidifier.
Furthermore, the simulation galvanic pile system further comprises a heater, a second pressure reducing valve, a three-way valve and a third mass flow meter which are sequentially communicated, two ends of the humidifier are respectively communicated with the front testing unit and the heater through pipelines, the fine tuning valve is communicated with the third mass flow meter, and a third channel of the three-way valve is communicated with the rear testing unit.
Furthermore, a first humidity sensor is arranged between the humidifier and the heater, a third temperature sensor is arranged between the heater and the second pressure reducing valve, and a third pressure sensor is arranged between the second pressure reducing valve and the three-way valve.
Further, the front test unit comprises a second pressure sensor, a second temperature sensor and a second mass flow meter which are communicated with each other through a pipeline.
Furthermore, the rear test unit comprises a humidity sensor, a fourth temperature sensor, a volume flow meter and a fourth pressure sensor which are mutually communicated through pipelines.
Furthermore, a manual valve for controlling the opening and closing of the gas circulation pipeline is arranged between the output port and the rear test unit.
Further, be equipped with storage water tank, water pump and level sensor on the water circulating line, the both ends of storage water tank pass through the pipeline respectively with the outlet with the humidifier intercommunication, the water pump set up in between storage water tank and the humidifier, level sensor set up in on the storage water tank.
Further, the mouth that spouts intercommunication has the air feed unit, the air feed unit is including the gas cylinder that loops through the pipeline intercommunication, first relief pressure valve, electromagnetism proportional valve and check valve, the check valve pass through the pipeline with the mouth that spouts intercommunication.
Further, the pipeline of the air supply unit is provided with a first temperature sensor, a first mass flow meter and a first pressure sensor.
A test method of a performance test system of a fuel cell separation ejector is characterized in that the opening and closing degrees of a first pressure reducing valve and a second pressure reducing valve are adopted to simulate the pressure change in a fuel cell stack, the opening size of a fine adjustment valve is adopted to simulate the gas consumption, and a heater is adopted to simulate the temperature change in the stack, so that the performance test of the separation ejector under different working conditions is realized; and then obtaining the working performance of the separation ejector through the temperature, pressure, humidity and flow under various working conditions.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention relates to a performance test system and a test method of a fuel cell separation ejector, which are provided with a gas circulation pipeline, wherein the gas circulation pipeline comprises an input port, a front test unit, a simulation electric pile system, a rear test unit and an output port which are sequentially communicated from head to tail; the input port is communicated with the diffusion chamber, and the output port is communicated with the air inlet. The front test unit and the rear test unit can test the temperature, pressure, humidity and flow of gas to obtain the working performance of the separation ejector. The simulated galvanic pile system comprises a humidifier for improving humidity and a trim valve for releasing hydrogen, wherein the humidifier can adjust moisture in the hydrogen according to a test working condition, and the moisture content of the hydrogen at the anode outlet of the galvanic pile is simulated. The trim valve can release hydrogen outwards, and can accurately control the gas consumption in the self-simulation galvanic pile. Therefore, the change of inlet and outlet gas in the galvanic pile through the galvanic pile is simulated more comprehensively and meticulously, so that the gas composition, proportion and humidity in the pipeline are closer to the real condition, and the test result is more accurate and effective.
(2) The invention discloses a performance test system and a performance test method of a fuel cell separation ejector, which are provided with a water circulation pipeline, wherein two ends of the water circulation pipeline are respectively communicated with a water outlet and a humidifier, and water discharged from the water outlet can be input into the humidifier so as to realize the cyclic utilization of water. The method not only effectively treats the steam and water generated by the separation ejector, but also does not need to provide water sources for the humidifier excessively.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a fuel cell separator ejector performance testing system according to the present invention;
FIG. 2 is a schematic diagram of a performance testing system and method for a fuel cell separator ejector according to the present invention;
in the figure, 1-gas cylinder, 2-first pressure reducing valve, 3-electromagnetic proportional valve, 4-first temperature sensor, 5-first mass flowmeter, 6-check valve, 7-first pressure sensor, 8-separation ejector, 9-second pressure sensor, 10-second temperature sensor, 11-second mass flowmeter, 12-humidifier, 13-first humidity sensor, 14-heater, 15-third temperature sensor, 16-second pressure reducing valve, 17-third pressure sensor, 18-three-way valve, 19-third mass flowmeter, 20-fine adjustment valve, 21-second humidity sensor, 22-fourth temperature sensor, 23-volume flowmeter, 24-fourth pressure sensor, 25-manual valve, 26-water storage tank, 27-liquid level sensor, 28-water pump, 29-analog electric pile system, 30-front test unit, 31-rear test unit and 32-gas supply unit.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The utility model provides a performance test system and test method of fuel cell separation ejector, relates to fuel cell technical field, and this test system adopts the simulation galvanic pile to test the separation ejector of specialization, can effectively avoid the use damage to the galvanic pile, and the galvanic pile is added in the later stage and is tested, can play the effect that reduces the test cost, protection testing arrangement. In addition, the system and the method can simulate the internal environment change of the galvanic pile more truly, so that the measurement result is more accurate.
Referring to fig. 1 and fig. 2, in the present embodiment, a performance testing system and a testing method for a fuel cell separation ejector include a separation ejector, where the separation ejector includes: the steam-water separation component and the injection component are arranged in the shell; the steam-water separation assembly comprises a first separation cavity, a second separation cavity and a reservoir, wherein the first separation cavity and the second separation cavity are communicated with each other; the reservoir is respectively communicated with the lower parts of the first separation cavity and the second separation cavity so as to collect liquid water; one end of the first separation cavity is provided with an air inlet communicated with the outside, one end of the second separation cavity is provided with a communication port communicated with the injection assembly, and the injection assembly can guide secondary airflow from the communication port to the fuel cell. The jet inlet is used for inputting primary air flow, the air inlet is used for inputting secondary air flow, the water outlet is used for discharging steam and water, and the diffusion chamber is directly butted with a simulation electric pile system of the fuel cell.
A performance test system of a fuel cell separation ejector further comprises a gas circulation pipeline and a water circulation pipeline, wherein the gas circulation pipeline comprises an input port, a front test unit 30, a simulation electric pile system 29, a rear test unit 31 and an output port which are sequentially communicated from top to bottom; the input port is communicated with the diffusion chamber, and the output port is communicated with the air inlet. The front test unit 30 and the rear test unit 31 can test the temperature, pressure, humidity and flow of the gas to obtain the working performance of the separation ejector 8. The simulated stack system 29 comprises a humidifier 12 for raising humidity and a trim valve 20 for releasing hydrogen, wherein the humidifier 12 can increase moisture in a pipeline to simulate the humidity change of reaction gas during the operation of a stack. The trim valve 20 can release hydrogen outwards, and the gas consumption in the self-simulation electric pile can be accurately controlled. Therefore, the change of the gas in the galvanic pile is simulated more comprehensively and carefully, and the test result is ensured to be more accurate and effective.
Both ends of the water circulation pipeline are respectively communicated with the water outlet and the humidifier 12, and water discharged from the water outlet can be input into the humidifier 12, so that the water can be recycled. The method not only effectively treats the steam and water generated by the separation ejector 8, but also does not need to provide excessive water source for the humidifier 12.
During use, the gas output from the diffusion chamber of the separating eductor 8 is first passed through the pretest unit 30, the pretest unit 30 recording the pressure, flow and temperature of the gas. The gas then enters the simulated stack system 29, the humidifier 12 in the simulated stack system 29 can simulate the stack humidity changes, and the trim valve 20 can simulate the gas consumption in the stack. Next, the gas enters the post-test unit 31, the post-test unit 31 is capable of testing the temperature, pressure, humidity and flow of the gas passing through the simulated stack system 29, and finally the gas is communicated with the gas inlet through the outlet and returns to the separation ejector 8. The soda water is discharged from the water discharge port and enters the humidifier 12, so that the reuse is achieved.
The simulation stack system 29 further includes a heater 14, a second pressure reducing valve 16, a three-way valve 18, and a third mass flow meter 19, which are sequentially connected, where the heater 14 is specifically a PTC heater, and the PTC heater can heat gas and simulate the heating of gas inside the stack. The pressure difference between two sides of the second pressure reducing valve 16 can be changed by adjusting the second pressure reducing valve 16, and the pressure drop of the fuel cell stack is simulated. The humidifier 12 is connected to the pre-test unit 30 and the heater 14 through pipes at two ends, the trim valve 20 is connected to a third mass flow meter 19, the third mass flow meter 19 can monitor the mass flow of the gas discharged from the trim valve 20, the trim valve 20 is a needle valve, and the needle valve is needle-shaped and moves in the moving direction of the fluid to change the flow cross-sectional area for cutting off or adjusting the flow. In a further embodiment, a first humidity sensor 13 is provided between the humidifier 12 and the heater 14, a third temperature sensor 15 is provided between the heater 14 and the second pressure reducing valve 16, and a third pressure sensor 17 is provided between the pressure reducing valve 16 and the three-way valve 18. The first humidity sensor 13 may monitor the operation of the humidifier 12 to detect a change in humidity of the gas, the third temperature sensor 15 may monitor the operation of the heater 14 to monitor the temperature of the gas in the pipe in real time, and the third pressure sensor 17 may measure the pressure of the gas before passing through the second pressure reducing valve 16.
The pre-test unit 30 includes a second pressure sensor 9, a second temperature sensor 10, and a second mass flow meter 11 that are communicated with each other through a pipe. The second pressure sensor 9 may measure the pressure of the gas before passing through the simulated stack system 29, the second temperature sensor 10 may measure the temperature of the gas before passing through the simulated stack system 29, and the second mass flow meter 11 may measure the mass flow rate of the gas before passing through the simulated stack system 29.
The post-test unit 31 includes a second humidity sensor 21, a fourth temperature sensor 22, a volume flow meter 23, and a fourth pressure sensor 24 that are communicated with each other through a pipe. The second humidity sensor 21 may measure the humidity of the gas after passing through the simulated stack system 29, the fourth temperature sensor 22 may measure the temperature of the gas after passing through the simulated stack system 29, the volume flow meter 23 may measure the volume flow rate of the gas after passing through the simulated stack system 29, and the fourth pressure sensor 24 may measure the pressure of the gas after passing through the simulated stack system 29.
A manual valve 25 for controlling the opening and closing of the gas circulation line is provided between the output port and the rear test unit 31. When the manual valve 25 and the trim valve 20 are closed, it is possible to detect whether there is a leak in the entire gas circulation line. Be equipped with storage water tank 26, level sensor 27 and water pump 28 on the hydrologic cycle pipeline, the both ends of storage water tank 26 are passed through the pipeline and are communicate with outlet and humidifier 12 respectively, level sensor 27 sets up on storage water tank 26, water pump 28 sets up on the pipeline between humidifier 12 and storage water tank 26, can suck the hydrops in the storage water tank 26 to humidifier 12 under the effect of water pump 28 in, level sensor 27 can monitor storage water tank 26, avoids storage water tank 26 to take place the overfilling.
The primary airflow inlet of the separation ejector 8 is communicated with an air supply unit 32, the air supply unit 32 comprises an air bottle 1, a first pressure reducing valve 2, an electromagnetic proportional valve 3 and a check valve 6 which are sequentially communicated through pipelines, and the check valve 6 is communicated with the primary airflow inlet through a pipeline. The electromagnetic proportional valve 3 can adjust the gas supply amount by controlling the opening degree, and the gas pressure of the primary gas flow inlet entering the separation ejector 8 can be changed by adjusting the first pressure reducing valve 2. In a further embodiment, the air supply unit 32 is provided with a first temperature sensor 4, a first mass flow meter 5, and a first pressure sensor 7 on a pipeline. The first temperature sensor 4 may measure the temperature in the pipe of the air supply unit 32, and the first mass flow meter 5 may measure the mass flow rate in the pipe of the air supply unit 32. The first pressure sensor 7 is provided between the first pressure reducing valve 2 and the separating ejector 8, and the first pressure sensor 7 can measure the pressure of the gas processed by the first pressure reducing valve 2. It should be noted that: the gas cylinder 1 is provided with a gas cylinder valve which plays the roles of preventing gas pressure from being too high and adjusting pressure and flow.
A test method of a performance test system of a fuel cell separation ejector is characterized in that the opening and closing degrees of a first pressure reducing valve 2 and a second pressure reducing valve 16 are adopted to simulate the pressure change inside a fuel cell stack, the pressure reducing valves can change the pressure on two sides of a valve body, and the pressure change of gas input into the stack through a separation ejector 8 is simulated. The fine adjustment valve 20 is adjusted, and the opening size of the fine adjustment valve 20 is controlled, so that gas is output to the outside, and hydrogen consumption in the electric pile is simulated. The heater 14 releases heat, heating the gas in the duct, to simulate gas heating inside the stack. And finally, measuring the temperature, pressure, humidity and flow under various working conditions to obtain the real working performance of the separation ejector 8.
The working process is as follows:
(1) And determining the target pressure of the first pressure sensor, the target hydrogen consumption of the electric pile and the target pressure drop according to the tested electric pile power point.
(2) During testing, the opening degree of the electromagnetic proportional valve 3 is firstly fixed, the first pressure reducing valve 2 is adjusted until the reading of the first pressure sensor 7 reaches the required target pressure, and the readings of the third pressure sensor 17, the fourth pressure sensor 24 and the second mass flow meter 11 are recorded.
(3) And calculating the actual hydrogen consumption and the pressure drop of the fuel cell stack under the working condition according to the data measured by the second mass flow meter 11 and the third pressure sensor 17, adjusting the opening degree of a needle valve of the fine adjustment valve 20 to enable the exhaust gas to be equal to the target hydrogen consumption of the stack, and adjusting the second reducing valve 16 to enable the difference value between the third pressure sensor 17 and the fourth pressure sensor 24 to be the target pressure drop of the fuel cell stack.
(4) According to the hydrogen flow requirements of the air inlets with different stack powers, the opening degree of the proportional valve is controlled to carry out tests under different stack powers, the humidity of the gas measured by the second humidity sensor 21 is recorded as Rh, the temperature measured by the fourth temperature sensor 22 is recorded as t4, the mass flow rates measured by the first mass flow meter 5 and the second mass flow meter 11 in unit time are respectively recorded as Q1 and Q2, and the volume flow rate measured by the volume flow meter 23 in unit time is recorded as Q3. The liquid level sensor 27 measures the change in liquid level of the storage tank 26 per unit time and is noted as ht. Separation efficiency α = S ht/(Rh Mt 4Q 3), where S is the bottom area of the storage tank 26 and Mt4 is the saturated humid air moisture content at t4 temperature. The injection coefficient omega = (Q2-Q1)/Q1. According to the method, two properties of the steam-water separation efficiency and the injection coefficient of the separation injector 8 can be calculated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the present invention.

Claims (10)

1. The utility model provides a fuel cell separates performance test system of ejector, includes the separation ejector, the separation ejector includes the jet inlet that is used for inputing primary air current, is used for inputing secondary air current the air inlet, is used for discharging the outlet and the diffusion chamber of soda, its characterized in that still includes:
the gas circulation pipeline comprises an input port, a front test unit, a simulation galvanic pile system, a rear test unit and an output port which are sequentially communicated from top to bottom; the input port is communicated with the diffusion chamber, and the output port is communicated with the air inlet; the simulation electric pile system comprises a humidifier for improving the humidity of hydrogen in the simulation electric pile and a fine adjustment valve for releasing the hydrogen, and the humidifier and the fine adjustment valve are respectively communicated with a pipeline; the front test unit and the rear test unit can test the temperature, pressure, humidity and flow of the gas;
and the two ends of the water circulation pipeline are respectively communicated with the water outlet and the humidifier.
2. The fuel cell separation ejector performance testing system of claim 1, further comprising a heater, a second pressure reducing valve, a three-way valve and a third mass flow meter which are sequentially communicated, wherein two ends of the humidifier are respectively communicated with the front testing unit and the heater through pipelines, the fine adjustment valve is communicated with the third mass flow meter, and a third channel of the three-way valve is communicated with the rear testing unit.
3. The system for testing the performance of the fuel cell separation ejector according to claim 2, wherein a first humidity sensor is arranged between the humidifier and the heater, a third temperature sensor is arranged between the heater and the second pressure reducing valve, and a third pressure sensor is arranged between the second pressure reducing valve and a three-way valve.
4. The fuel cell separation eductor performance testing system of claim 1 wherein the front test unit includes a second pressure sensor, a second temperature sensor, a second mass flow meter in communication with each other via a conduit.
5. The fuel cell separation ejector performance testing system of claim 1, wherein the post-test unit comprises a second humidity sensor, a fourth temperature sensor, a volumetric flow meter and a fourth pressure sensor which are communicated with each other through a pipeline.
6. The fuel cell separation ejector performance testing system of claim 1, wherein a manual valve for controlling the opening and closing of the gas circulation pipeline is arranged between the output port and the post-test unit.
7. The fuel cell separation ejector performance testing system of claim 1, wherein a water storage tank, a water pump and a liquid level sensor are arranged on the water circulation pipeline, two ends of the water storage tank are respectively communicated with the water outlet and the humidifier through pipelines, the water pump is arranged between the water storage tank and the humidifier, and the liquid level sensor is arranged on the water storage tank.
8. The fuel cell separation ejector performance testing system of claim 1, wherein the injection port is communicated with an air supply unit, the air supply unit comprises an air bottle, a first pressure reducing valve, an electromagnetic proportional valve and a check valve which are sequentially communicated through a pipeline, and the check valve is communicated with the injection port through a pipeline.
9. The fuel cell separation ejector performance testing system of claim 8, wherein a first temperature sensor, a first mass flow meter and a first pressure sensor are arranged on the pipeline of the gas supply unit.
10. The test method of the performance test system according to any one of claims 1 to 9, wherein the opening and closing degrees of the first pressure reducing valve and the second pressure reducing valve are used for simulating pressure change inside a fuel cell stack, the opening size of the fine adjustment valve is used for simulating gas consumption, and the heater is used for simulating temperature change inside the stack, so that the performance test of the separation ejector under different working conditions is realized; and then obtaining the working performance of the separation ejector through the temperature, pressure, humidity and flow under various working conditions.
CN202211027460.4A 2022-08-25 2022-08-25 Performance test system and test method for fuel cell separation ejector Pending CN115342863A (en)

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CN202211027460.4A CN115342863A (en) 2022-08-25 2022-08-25 Performance test system and test method for fuel cell separation ejector

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115597852A (en) * 2022-11-16 2023-01-13 深圳市氢蓝时代动力科技有限公司（Cn） Electromagnetic proportional valve testing device and method for fuel cell system
CN115824690A (en) * 2023-02-15 2023-03-21 山东省产品质量检验研究院 Fuel cell humidifier performance testing device and method
CN116914200A (en) * 2023-07-11 2023-10-20 武汉理工大学 Performance test system and test method for fuel cell engine separation ejector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115597852A (en) * 2022-11-16 2023-01-13 深圳市氢蓝时代动力科技有限公司（Cn） Electromagnetic proportional valve testing device and method for fuel cell system
CN115824690A (en) * 2023-02-15 2023-03-21 山东省产品质量检验研究院 Fuel cell humidifier performance testing device and method
CN115824690B (en) * 2023-02-15 2023-06-23 山东省产品质量检验研究院 Performance test device and method for fuel cell humidifier
CN116914200A (en) * 2023-07-11 2023-10-20 武汉理工大学 Performance test system and test method for fuel cell engine separation ejector

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