NL2031310B1 - Ejector test device for hydrogen fuel cell engine and test method - Google Patents

Ejector test device for hydrogen fuel cell engine and test method Download PDF

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Publication number
NL2031310B1
NL2031310B1 NL2031310A NL2031310A NL2031310B1 NL 2031310 B1 NL2031310 B1 NL 2031310B1 NL 2031310 A NL2031310 A NL 2031310A NL 2031310 A NL2031310 A NL 2031310A NL 2031310 B1 NL2031310 B1 NL 2031310B1
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ejector
hydrogen
gas
test
supply unit
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NL2031310A
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Dutch (nl)
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NL2031310A (en
Inventor
Wang Xiaobing
Zhao Xin
Ma Minghui
Yang Zirong
Wang Renguang
Chen Guang
Ji Xuefeng
Hao Dong
Wang Ruidi
Zhang Yanyi
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China Automotive Tech & Res Ct
Catarc New Energy Vehicle Test Center Tianjin Co Ltd
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    • 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
    • H01M8/04343—Temperature; Ambient temperature of anode exhausts
    • 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
    • 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
    • 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
    • H01M8/04305—Modeling, demonstration models of fuel cells, e.g. for training purposes
    • 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
    • H01M8/04402—Pressure; Ambient pressure; Flow of anode exhausts
    • 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
    • H01M8/04514—Humidity; Ambient humidity; Water content of anode exhausts
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04604—Power, energy, capacity or load
    • H01M8/04619—Power, energy, capacity or load of fuel cell stacks
    • 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
    • H01M8/04746—Pressure; Flow
    • H01M8/04753—Pressure; Flow of fuel cell 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
    • H01M8/04298—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
    • H01M8/04828—Humidity; Water content
    • H01M8/04835—Humidity; Water content of fuel cell 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
    • H01M8/04298—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
    • H01M8/04858—Electric variables
    • H01M8/04925—Power, energy, capacity or load
    • H01M8/0494—Power, energy, capacity or load of fuel cell stacks
    • 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
    • H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
    • 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

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Abstract

Provided, are an ejector test device for a hydrogen fuel cell engine and a test method. The test device includes a stack volume simulation unit, a main path gas supply unit, a hydrogen return path gas supply unit, a gas discharge unit, a control device, and 5 a. power supply device. The device can utilise a humidification device, to simulate a change in relative humidity of the hydrogen gas flowing through the stack, and further to test influence, from two phases of gas and liquid on ejection performance of the ejector, and can change flow of the main path gas supply unit and 10 a set value of a back pressure valve of the gas discharge unit, to simulate a capacity of the ejector to change according to a variable load working condition of the stack, and further to test ejection performance matching of the ejector.

Description

P1243 /NLpd
EJECTOR TEST DEVICE FOR HYDROGEN FUEL CELL ENGINE AND TEST METHOD
TECHNICAL FIELD
The present invention belongs to the field of hydrogen fuel cell tests, and particularly relates to an ejector test device for a hydrogen fuel cell engine and a test method.
BACKGROUND ART
In the operation process of the fuel cell system, water pro- duced at the cathode side are expected to reversely permeate to the anode side continuously, and the water management at the anode side plays a vital role in the fuel cell performance. As the core component of the fuel cell hydrogen supply system, the ejector circulates the supersaturated hydrogen gas from the stack outlet to the stack inlet, to humidify the dry hydrogen gas there, and thereby features the low cost and no parasitic power. The ejector recycles the hydrogen gas in the stack, thereby facilitating the water balance management and improving the hydrogen gas utilisa- tion rate.
In the practical application of the ejector in the fuel cell system, the main path inlet flow, the inlet pressure of the hydro- gen return port, and the relative humidity of the medium of the ejector are expected to be changed along with the change of the stack working condition. Therefore, it is impossible to truly re- flect the working performance of the ejector in the engine system by simply testing the working characteristics of the inlet flow and the hydrogen return port flow of the ejector. Generally, the system integrators and the main engine factories are required to perform the repeated verification tests on the actual fuel cell systems when selecting and matching the ejectors, thereby increas- ing the burdens on enterprises, and extending the system develop- ment cycles. During the ejector matching test in the actual fuel cell system, the inlet pressure fluctuation and the dry-wet cycle are highly possible to shorten the service life of the stack and degrade its performance. Therefore, it is of great significance for the hydrogen fuel cell industry to study the test device and the test method which can perform the ejector matching in a work- ing environment close to the real one.
SUMMARY
In view of the above, to solve the problems described above, the present invention provides an ejector test device for a hydro- gen fuel cell engine and a test method, which may simulate a real working environment of an ejector in an engine, to perform a work- ing characteristic test and an ejection performance matching test on the ejector safely and reliably.
To achieve the objective described above, the present inven- tion uses the technical solution as follows:
An ejector test device for a hydrogen fuel cell engine is characterized in that it includes a main path gas supply unit, a hydrogen return path gas supply unit, a stack volume simulation unit, a gas discharge unit, a control device, and a power supply device; the main path gas supply unit being provided with a gas out- let end connected to a main path gas inlet end of an ejector of an object under test, and used for providing hydrogen gas with an ad- justable pressure and flow for the ejector; the hydrogen return path gas supply unit being provided with a gas outlet end connected to a hydrogen return end of the ejector of the object under test, and used for providing hydrogen gas with an adjustable pressure and flow for the hydrogen return end of the ejector of the object under test, simulating, according to a stack actual working condition point, a stack outlet pressure, and uti- lising a humidification device to humidify the hydrogen gas sup- plied and simulate an actual working condition of the hydrogen re- turn end of the ejector; the stack volume simulation unit being provided with a gas inlet end connected to an exhaust end of the ejector of the object under test, and used for simulating a stack volume and buffering a pressure fluctuation; the gas discharge end being provided with a gas inlet end connected to a gas outlet end of the stack volume simulation unit;
and the control device and the power supply device being connect- ed, through wire bundles, to the main path gas supply unit, the hydrogen return path gas supply unit, the stack volume simulation unit, and the gas discharge unit.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the main path gas supply unit includes a main path electromagnetic valve, a flow controller, a flow meter, a pressure sensor, and a temperature sensor which are connected in sequence, an inlet end of the main path electromagnetic valve be- ing connected, through a pipeline, to a hydrogen gas source, and the flow meter being connected, through a pipeline, to the main path gas inlet end of the ejector of the object under test.
Further, the main path electromagnetic valve is used for switching on or off the gas path of the main path gas supply unit and cutting off a main path gas source during emergency, the flow controller is used for controlling outlet hydrogen gas flow or hy- drogen gas pressure of the main path gas supply unit, the flow me- ter is used for measuring circulating hydrogen gas flow of the main path gas supply unit, and the pressure sensor and the temper- ature sensor are used for measuring a pressure and a temperature of gas supplied to a main path, respectively.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the hydrogen return path gas supply unit includes a hydrogen return path electromagnetic valve, a pressure controller, a flow meter, a humidification device, a pressure sen- sor, and a temperature sensor which are connected in sequence, an inlet end of the hydrogen return path electromagnetic valve being connected, through a pipeline, to a hydrogen gas source, and the flow meter being connected, through a pipeline, to a hydrogen re- turn path gas inlet end of the ejector of the object under test.
Further, the hydrogen return path electromagnetic valve is used for controlling on-off of a gas path of the hydrogen return path gas supply unit and cutting off a hydrogen return path gas source during emergency, the pressure controller is used for con- trolling an outlet gas pressure of the hydrogen return path gas supply unit, the flow meter is used for measuring circulating hy-
drogen gas flow of the hydrogen return path gas supply unit, the humidification device is used for humidifying hydrogen return path hydrogen gas, and the pressure sensor and the temperature sensor are used for measuring a pressure and a temperature of gas sup- plied to a hydrogen return path, respectively.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the stack volume simulation unit includes a pressure sensor, a temperature sensor, and a stack volume simula- tor which are connected in sequence, an inlet end of the stack volume simulation unit being connected to an exhaust port of the ejector of the object under test, and an outlet end of the stack volume simulation unit being connected to an inlet end of the gas discharge unit.
Further, the pressure sensor and the temperature sensor are used for measuring a pressure and a temperature of the exhaust port of the ejector, respectively. The stack volume simulator is used for buffering influence, from a pressure fluctuation, on a test result.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the gas discharge unit includes an exhaust electromagnetic valve, a back pressure valve, and a flame retard- ant valve which are connected in sequence, an inlet end of the ex- haust electromagnetic valve being connected to a gas outlet end of the stack volume simulation unit.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the gas discharge unit further includes an emptying electromagnetic valve arranged in parallel with the ex- haust electromagnetic valve.
Further, the exhaust electromagnetic valve and the emptying electromagnetic valve are used for selecting a test channel of the ejector. The back pressure valve is used for adjusting a main path inlet hydrogen gas pressure of the ejector.
The ejector test device for a hydrogen fuel cell engine is characterized in that, the control device and the power supply de- vice are connected to the main path gas supply unit, the hydrogen return path gas supply unit, the stack volume simulation unit, and the gas discharge unit.
Further, the control device is used for controlling and ac- quiring a temperature, a pressure, and flow for an electrical ele- ment of the test device. The power supply device powers the elec- trical element of the test device. 5 A test method for the ejector test device for a hydrogen fuel cell engine is characterized in that it includes a method for testing a working characteristic of an ejector under an emptying condition. The method for testing a working characteristic in- cludes: {1) selecting, according to a main path flow range, a main path inlet end pressure range, and a hydrogen return end inlet pressure range of an ejector of an object under test, a test work- ing condition point; (2) utilising a control device to open a main path electro- magnetic valve of a main path gas supply unit, set target flow of a flow controller, and open an emptying electromagnetic valve of a gas discharge unit; (3) setting, according to the test working condition point of the ejector, an outlet pressure of a pressure controller and a set value of hydrogen gas relative humidity of a humidification device of a hydrogen return path gas supply unit; and (4) changing, according to the test working condition point, inlet flow of the ejector and an outlet pressure of the pressure controller of the hydrogen return path gas supply unit, and test- ing, under different flow and different hydrogen return port pres- sures, a change in ejector performance.
The test method for the ejector test device for a hydrogen fuel cell engine is characterized in that, it includes a method for testing ejection performance matching of an ejector under a condition simulating an actual operation working condition. The method for testing ejection performance matching includes: (1) selecting, according to a working scene of an ejector of an object under test, a test working condition point, to determine main path inlet flow, and a corresponding pressure of the ejector, and an inlet hydrogen gas pressure and relative humidity of a hy- drogen return path of the ejector; (2) utilising a control device to open a main path electro-
magnetic valve of a main path gas supply unit and an exhaust elec- tromagnetic valve of a gas discharge unit, set target flow of a flow controller of the main path gas supply unit, and adjust a back pressure valve to set an inlet pressure of the ejector; (3) opening a hydrogen return path electromagnetic valve of a hydrogen return path gas supply unit, and setting, according to the working condition point, an outlet pressure of a pressure con- troller and hydrogen gas relative humidity of a humidification de- vice of the hydrogen return path gas supply unit; {4) testing, under different working condition points, a change in working characteristic of the ejector; and (5) utilising the control device to acquire flow of a main path flow meter and flow of a hydrogen return path flow meter, and analysing data.
Compared with the prior art, the ejector matching test device for a hydrogen fuel cell engine and the test method of the present invention have the advantages as follows: (1) The device simplifies a complicated hydrogen gas supply system of the fuel cell engine, may simulate a real working envi- ronment of the ejector in a fuel cell engine system, and sets an inlet pressure of the main path and an inlet pressure of the hy- drogen return port of the ejector, to simulate a pressure drop generated when hydrogen gas flows through a stack in an actual op- eration process of the fuel cell engine. The device may utilise the humidification device to simulate a change in relative humidi- ty of the hydrogen gas flowing through the stack, and further to test influence, from two phases of gas and liquid, media of the hydrogen return path of the ejector, on the ejection performance of the ejector, and can change the flow of the main path gas sup- ply unit and a set value of the back pressure valve of the gas discharge unit, to simulate a capacity of the ejector to change according to a variable load working condition of the stack, and further to test ejection performance matching of the ejector. (2) The ejector test method for a hydrogen fuel cell engine of the present invention may test a basic working characteristic of the ejector rapidly safely, and reliably, and simulate the ac- tual operation working condition of the ejector, to perform an ejection performance matching development test on the ejector for the fuel cell engine.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings constituting a part of the present invention serve to provide a further understanding of the present invention, and schematic embodiments of the present invention and the description thereof are used to explain the present invention, and are not intended to unduly limit the present invention. In the accompanying drawings:
FIG. 1 is a structural schematic diagram of the test of a basic characteristic of an ejector which may be performed rapidly safely, and reliably, and the test of matching development between the ejector and a fuel cell engine system in embodiments of the present invention .
Reference numerals: l-main path gas supply unit; 11-main path electromagnetic valve; 12-flow controller; 13-flow meter; ld-pressure sensor; and l5-temperature sensor; 2-hydrogen return path gas supply unit; 21-hydrogen return path electromagnetic valve; 22-pressure controller; 23-flow meter; 24-humidification device; 25-pressure sensor; and 26-temperature sensor; 3-stack volume simulation unit; 31-pressure sensor; 32- temperature sensor; and 33-stack volume simulator; 4-gas discharge unit; 41-exhaust electromagnetic valve; 42- back pressure valve; 43-emptying electromagnetic valve; and 44- flame retardant valve; 5-control device; 6-power supply device; and
J-ejector.
DETAILED DESCRIPTION OF THE EMBODIMENTS
It should be noted that the embodiments of the present inven- tion and features of the embodiments may be combined with one an- other without conflict.
In the description of the present invention, it is to be un-
derstood that the terms “central”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, etc. indicate az- imuthal or positional relations based on those shown in the accom- panying drawings only for ease of description of the present in- vention and for simplicity of description, are not intended to in- dicate or imply that the referenced device or element must have a particular orientation and be constructed and operative in a par- ticular orientation, and thus may not be interpreted as a limita- tion on the present invention. Unless otherwise specified, “a plu- rality of” means two or more in the description of the present in- vention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified and defined, the terms “mounting”, “connecting”, and “connection” should be under- stood in a broad sense, for example, they may be a fixed connec- tion, a detachable connection, or an integrated connection; may be a mechanical connection, or an electrical connection; and may be a direct connection, an indirect connection via an intermediate me- dium, or communication inside two elements. For those of ordinary skill in the art, the specific meanings of the terms described above in the present invention may be understood according to spe- cific circumstances.
The present invention is described in detail below with ref- erence to the accompanying drawings and the embodiments.
As shown in FIG. 1, an ejector test device for a hydrogen fuel cell engine is characterized in that it includes a main path gas supply unit 1, a hydrogen return path gas supply unit 2, a stack volume simulation unit 3, a gas discharge unit 4, a control device 5, and a power supply device 6.
The main path gas supply unit 1 includes a main path electro- magnetic valve 11, a flow controller 12, a flow meter 13, a pres- sure sensor 14, and a temperature sensor 15 which are connected in sequence. An inlet end of the main path electromagnetic valve 11 is connected, through a pipeline, to a hydrogen gas source, and the flow meter 13 is connected, through a pipeline, to a main path gas inlet end of an ejector 7 of an object under test. The pres-
sure sensor 14 and the temperature sensor 15 are connected, through a sampling pipeline, to a pipeline between the flow meter 13 and a main path inlet end of the ejector 7 of the object under test.
The hydrogen return path gas supply unit 2 includes a hydro- gen return path electromagnetic valve 21, a pressure controller 22, a flow meter 23, a humidification device 24, a pressure sensor 25, and a temperature sensor 26 which are connected in sequence.
An inlet end of the hydrogen return path electromagnetic valve 21 is connected, through a pipeline, to a hydrogen gas source, and the flow meter 23 is connected, through a pipeline, to a hydrogen return path gas inlet end of the ejector 7 of the object under test. The pressure sensor 25 and the temperature sensor 26 are connected, through a sampling pipeline, to a pipeline between the flow meter 23 and the main path inlet end of the ejector 7 of the object under test. the stack volume simulation unit 3 includes a pressure sensor 31, a temperature sensor 32, and a stack volume simulator 33 which are connected in sequence. An inlet end of the stack volume simu- lation unit 3 is connected to an exhaust port of the ejector 7 of the object under test, and an outlet end of the stack volume simu- lation unit 3 is connected to an inlet end of the gas discharge unit 4.
The gas discharge unit 4 includes an exhaust electromagnetic valve 41, a back pressure valve 42, and a flame retardant valve 44 which are connected in sequence, an inlet end of the exhaust elec- tromagnetic valve 41 being connected to a gas outlet end of the stack volume simulation unit 3. The gas discharge unit 4 further includes an emptying electromagnetic valve 43 arranged in parallel with the exhaust electromagnetic valve 41.
The control device 5 is used for controlling and acquiring a temperature, a pressure, and flow for an electrical element of the test device. The power supply device 6 supplies power to the elec- trical element of the test device.
The ejector test device for a hydrogen fuel cell engine of the present invention works as follows: in a test, the control de- vice 5 is utilised to open the main path electromagnetic valve 11 and the hydrogen return path electromagnetic valve 21 at first.
The control device 5 is utilised to set an outlet pressure of the pressure controller 22 and hydrogen gas relative humidity of the humidification device 24. Depending on test requirements, the con- trol device 5 is utilised to open the exhaust electromagnetic valve 41 or the emptying electromagnetic valve 43. According to a test working condition, the control device 5 is utilised to set flow of the flow controller 12 and a back pressure of the back pressure valve 42, the main path hydrogen gas flow meter 13 is utillised to record main path flow of the ejector, and the hydro- gen return path flow meter 23 is utilised to record hydrogen re- turn path flow of the ejector. According to the test working con- dition, the flow of the flow controller 12, the back pressure of the back pressure valve 42, a pressure of the pressure controller 22, and the hydrogen gas relative humidity of the humidification device 24 may be changed, to perform a working characteristic test on the ejector and an ejection performance matching test on the ejector.
A test method using the ejector test device for a hydrogen fuel cell engine shown in FIG. 1 may realize: 1. a working charac- teristic test of an ejector under an emptying condition; and 2. an ejection performance matching test of an ejector under a condition simulating an actual operation working condition. 1. The working characteristic test under an emptying condi- tion of an exhaust port of an ejector includes: {1) Select, according to a main path flow range, a main path inlet end pressure range, and a hydrogen return end inlet pressure range of an ejector 7 of an object under test, a test working con- dition point. (2) Utilise a control device 5 to open a main path electro- magnetic valve 11 of a main path gas supply unit, set target flow of a flow controller 12, and open an emptying electromagnetic valve 43 of a gas discharge unit 4. (3) Open a hydrogen return path electromagnetic valve 21 of a hydrogen return path gas supply unit 2, and set, according to the test working condition point of the ejector 7, an outlet pressure of a pressure controller 22 and hydrogen gas relative humidity of a humidification device 24 of the hydrogen return path gas supply unit 2. (4) Change, according to the test working condition point, inlet flow of the ejector 7 and outlet pressure of the pressure controller 22 of the hydrogen return path gas supply unit 2, and test, under different flow and different hydrogen return port pressures, a change in ejector performance. 2. The ejection performance matching test of an ejector under a condition simulating an actual operation working condition in- cludes: (1) Select, according to a working scene of an ejector 7 of an object under test, a test working condition point, to determine main path inlet flow and a corresponding pressure of the ejector 7, and an inlet hydrogen gas pressure and relative humidity of a hydrogen return path of the ejector 7. (2) Utilise a control device 5 to open a main path electro- magnetic valve 11 of a main path gas supply unit 1 and an exhaust electromagnetic valve 41 of a gas discharge unit 4, set target flow of a flow controller 12 of the main path gas supply unit 1, and adjust a back pressure valve 42 to set an inlet pressure of the ejector 7. (3) Open a hydrogen return path electromagnetic valve of a hydrogen return path gas supply unit 2, and set, according to the working condition point, an outlet pressure of a pressure control- ler 22 and hydrogen gas relative humidity of a humidification de- vice 24 of the hydrogen return path gas supply unit 2. (4) Test, under different working condition points, a change in working characteristic of the ejector 7. {5) Utilise the control device 5 to acquire flow of a main path flow meter 13 and flow of a hydrogen return path flow meter 23, and analyse data.
What is described above is merely the preferred embodiments of the present invention, and not intended to limit the present invention. Any modifications, equivalent replacements, improve- ments, etc. made within the spirit and principle of the present invention should all fall within the scope of protection of the present invention.

Claims (10)

CONCLUSIESCONCLUSIONS 1. Ejectortestapparaat voor een waterstofbrandstofcelmotor, met het kenmerk, dat het een gastoevoereenheid voor het hoofdpad, een gastoevoereenheid voor het waterstofretourpad, een simulatie- eenheid voor het stackvolume, een gasontladingseenheid, een bestu- ringsapparaat en een voedingsapparaat omvat; waarbij de gastoevoereenheid voor het hoofdpad is voorzien van een gasuitlaatuit die is verbonden met een gasinlaat van het hoofdpad van een ejector van een te testen object, en wordt gebruikt voor het verschaffen van waterstofgas met een instelbare druk en stroom voor een hoofdpad van de ejector; waarbij de gastoevoereenheid voor de waterstofretourpad is voor- zien van een gasuitlaat die is aangesloten op een waterstofretour- einde van de ejector van het te testen object, en wordt gebruikt voor het toevoeren van waterstofgas met een instelbare druk en stroom voor het waterstofretoureinde van de ejector van het te testen object, waarbij het toegevoerde waterstofgas wordt bevoch- tigd door een bevochtigingsinrichting; waarbij de simulatie-eenheid voor het stackvolume is voorzien van een gasinlaat die is verbonden met een uitlaat van de ejector van het te testen object, en wordt gebruikt voor het simuleren van een stackvolume; en waarbij het besturingsapparaat en het voedingsapparaat via draad- bundels zijn aangesloten op de gastoevoereenheid van het hoofdpad, de gastoevoereenheid voor het waterstofretourpad, de simulatie- eenheid voor het stackvolume en de gasontladingseenheid.An ejector test apparatus for a hydrogen fuel cell engine, characterized in that it includes a main path gas supply unit, a hydrogen return path gas supply unit, a stack volume simulation unit, a gas discharge unit, a control device and a power supply device; wherein the main path gas supply unit has a gas outlet outlet connected to a gas inlet of the main path of an ejector of an object under test, and is used to provide hydrogen gas with an adjustable pressure and flow to a main path of the ejector; wherein the gas supply unit for the hydrogen return path includes a gas outlet connected to a hydrogen return end of the ejector of the object under test, and used to supply hydrogen gas at an adjustable pressure and flow to the hydrogen return end of the ejector of the object to be tested, wherein the hydrogen gas supplied is humidified by a humidification device; wherein the stack volume simulation unit includes a gas inlet connected to an outlet of the ejector of the object under test and used for simulating a stack volume; and wherein the control device and the power supply device are connected via wire bundles to the main path gas supply unit, the hydrogen return path gas supply unit, the stack volume simulation unit and the gas discharge unit. 2. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 1, met het kenmerk, dat de gastoevoereenheid voor het hoofdpad een elektromagnetische klep voor het hoofdpad, een stroomregelaar, een stroommeter, een druksensor en een tempera- tuursensor omvat die opeenvolgend zijn verbonden, waarbij een in- laateinde van de elektromagnetische klep van het hoofdpad via een pijpleiding is aangesloten op een waterstofgasbron, en de stroom- meter, via een pijpleiding, is aangesloten op het gasinlaateinde van het hoofdpad van de ejector van het te testen object.A hydrogen fuel cell engine ejector test device according to claim 1, characterized in that the main path gas supply unit includes a main path solenoid valve, a flow controller, a flow meter, a pressure sensor and a temperature sensor connected in sequence, wherein a inlet end of the solenoid valve of the main path is connected through a pipeline to a hydrogen gas source, and the flow meter, through a pipeline, is connected to the gas inlet end of the main path of the ejector of the object under test. 3. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 1, met het kenmerk, dat de gastoevoereenheid voor het waterstofretourpad een elektromagnetische klep voor het water- stofretourpad, een drukregelaar, een stroommeter, een bevochti- gingsinrichting, een druksensor, en een temperatuursensor omvat die opeenvolgend zijn verbonden, waarbij een inlaateinde van de elektromagnetische klep van het waterstofretourpad via een pijp- leiding is aangesloten op een waterstofgasbron, en de stroommeter via een pijpleiding is aangesloten op een gasinlaateinde van het waterstofretourpad van de ejector van het te testen object.A hydrogen fuel cell engine ejector test device according to claim 1, characterized in that the hydrogen return path gas supply unit includes a hydrogen return path solenoid valve, a pressure regulator, a flow meter, a humidification device, a pressure sensor, and a temperature sensor are connected sequentially, wherein an inlet end of the solenoid valve of the hydrogen return path is piped to a hydrogen gas source, and the flow meter is piped to a gas inlet end of the hydrogen return path of the ejector of the object under test. 4. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 1, met het kenmerk, dat de simulatie-eenheid voor het stackvolume een druksensor, een temperatuursensor en een simu- lator voor het stackvolume omvat die opeenvolgend zijn verbonden, waarbij een inlaatuiteinde van de simulatie-eenheid voor het stackvolume is aangesloten op een uitlaatpoort van de ejector van het te testen object, en een uitlaateinde van de simulatie-eenheid voor het stackvolume is aangesloten op een inlaateinde van de gas- ontladingseenheid.A hydrogen fuel cell engine ejector test device according to claim 1, characterized in that the stack volume simulation unit includes a pressure sensor, a temperature sensor and a stack volume simulator connected in sequence, wherein an inlet end of the simulation unit stack volume unit is connected to an outlet port of the ejector of the object under test, and an outlet end of the stack volume simulation unit is connected to an inlet end of the gas discharge unit. 5. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 1, met het kenmerk, dat de gasontladingseenheid een elektromagnetische klep voor de uitlaat, een tegendrukklep en een vlamvertragende klep omvat die opeenvolgend zijn verbonden, waar- bij een inlaateinde van de elektromagnetische klep voor de uitlaat is aangesloten op een gasuitlaateinde van de simulatie-eenheid voor het stackvolume.A hydrogen fuel cell engine ejector test device according to claim 1, characterized in that the gas discharge unit includes an exhaust solenoid valve, a back pressure valve and a flame retardant valve connected in sequence, with an inlet end of the exhaust solenoid valve is connected to a gas outlet end of the stack volume simulation unit. 6. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 5, met het kenmerk, dat de gasontladingseenheid verder een elektromagnetische ledigingsklep omvat die parallel aan de elektromagnetische klep voor de uitlaat is opgesteld.A hydrogen fuel cell engine ejector test device according to claim 5, characterized in that the gas discharge unit further comprises an electromagnetic purge valve arranged parallel to the exhaust solenoid valve. 7. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol-7. Ejector test device for a hydrogen fuel cell engine fully gens conclusie 1, met het kenmerk, dat het besturingsapparaat is verbonden met de gastoevoereenheid voor het hoofdpad, de gastoe- voereenheid voor het waterstofretourpad, de simulatie-eenheid voor het stackvolume en de gasontladingseenheid.according to claim 1, characterized in that the control device is connected to the main path gas supply unit, the hydrogen return path gas supply unit, the stack volume simulation unit and the gas discharge unit. 8. Ejectortestinrichting voor een waterstofbrandstofcelmotor vol- gens conclusie 1, met het kenmerk, dat het voedingsapparaat stroom levert aan de gastoevoereenheid voor het hoofdpad, de gas- toevoereenheid voor het waterstofretourpad, de simulatie-eenheid voor het stackvolume, de gasontladingseenheid, en het controleap- paraat.A hydrogen fuel cell engine ejector test device according to claim 1, characterized in that the power supply unit supplies power to the main path gas supply unit, the hydrogen return path gas supply unit, the stack volume simulation unit, the gas discharge unit, and the control unit - ready. 9. Testmethode voor de ejectortestinrichting voor een waterstof- brandstofcelmotor volgens conclusie 1, met het kenmerk, dat deze een methode omvat voor het testen van een werkkarakteristiek van een ejector onder een ledigende toestand, waarbij de methode om- vat: (1) het selecteren, in overeenstemming met een stroombereik voor een hoofdpad, een inlaatdrukbereik voor een hoofdpad en een in- laatdrukbereik voor een waterstofretoureinde van een ejector van een te testen object, van een testwerkconditiepunt; (2) het gebruiken van een besturingsapparaat om een elektromagnetische klep voor het hoofdpad van een gastoevoereen- heid voor het hoofdpad te openen, een doelstroom van een stroomre- gelaar in te stellen, en een elektromagnetische ledigende klep van een gasontladingseenheid te openen; (3) het instellen, in overeenstemming met het testwerkconditiepunt van de ejector, van een uitlaatdruk van een drukregelaar en een ingestelde waarde van de relatieve vochtigheid van waterstofgas van een bevochtigingsinrichting van een gastoevoereenheid van het waterstofretourpad; en (4) het veranderen, in overeenstemming met het testwerkconditie- punt, van de inlaatstroom van de ejector en een uitlaatdruk van de drukregelaar van de gastoevoereenheid voor het waterstofretourpad, en het testen, onder verschillende stromen en verschillende water- stofretourpoortdrukken, van een verandering in ejectorprestaties.A test method for the hydrogen fuel cell engine ejector test device according to claim 1, characterized in that it comprises a method for testing an operating characteristic of an ejector under an empty condition, the method comprising: (1) selecting , corresponding to a flow range for a main path, an inlet pressure range for a main path and an inlet pressure range for a hydrogen return end of an ejector of an object under test, of a test working condition point; (2) using a control device to open a main path solenoid valve of a main path gas supply unit, set a target current of a flow controller, and open a solenoid purge valve of a gas discharge unit; (3) setting, in accordance with the test working condition point of the ejector, an outlet pressure of a pressure regulator and a set value of the relative humidity of hydrogen gas of a humidifying device of a gas supply unit of the hydrogen return path; and (4) changing, in accordance with the test working condition point, the inlet flow of the ejector and an outlet pressure of the pressure regulator of the gas supply unit for the hydrogen return path, and testing, under different flows and different hydrogen return port pressures, a change in ejector performance. 10. Testmethode voor de ejectortestinrichting voor een waterstof- brandstofcelmotor volgens conclusie 1, met het kenmerk, dat deze een methode omvat voor het testen van de afstemming van de ejec- torprestatie van een ejector onder een toestand die een werkelijke bedrijfstoestand simuleert, waarbij de methode omvat: (1) het selecteren, volgens een werkscène van een ejector van een te testen object, van een testwerkconditiepunt, om de inlaatstroom van het hoofdpad te bepalen, en een overeenkomstige druk van de ejector, en een inlaatwaterstofgasdruk en relatieve vochtigheid van een waterstofretourpad van de ejector; {2} het gebruik maken van een besturingsapparaat om een elektromagnetische klep voor het hoofdpad van een gastoevoereen- heid voor het hoofdpad en een elektromagnetische klep voor de uit- laat van een gasontladingseenheid te openen, de doelstroom van een stroomregelaar van de gastoevoereenheid voor het hoofdpad in te stellen, en een tegendrukklep bij te regelen om een inlaatdruk van de ejector in te stellen; (3) het openen van een elektromagnetische klep van het waterstof- retourpad van een gastoevoereenheid voor het waterstofretourpad, en het instellen, in overeenstemming met het werkconditiepunt, van een uitlaatdruk van een drukregelaar en de relatieve vochtigheid van het waterstofgas van een bevochtigingsapparaat van de gastoe- voereenheid van het waterstofretourpad ; (4) het testen, onder verschillende werkomstandigheden, van een verandering in de werkkarakteristiek van de ejector; en (5) het gebruik maken van het besturingsapparaat om de stroom van een stroommeter voor het hoofdpad en stroom van een stroommeter voor het waterstofretourpad te verkrijgen, en het analyseren van gegevens.A test method for the hydrogen fuel cell engine ejector test device according to claim 1, characterized in that it comprises a method for testing the ejector performance tuning of an ejector under a condition simulating an actual operating condition, the method includes: (1) selecting, according to a working scene of an ejector of an object under test, a test working condition point, to determine the inlet flow of the main path, and a corresponding pressure of the ejector, and an inlet hydrogen gas pressure and relative humidity of a hydrogen return path of the ejector; {2} using a control device to open a main path solenoid valve of a main path gas supply unit and an exhaust solenoid valve of a gas discharge unit, the target flow of a flow regulator of the main path gas supply unit and adjust a back pressure valve to set an ejector inlet pressure; (3) opening an electromagnetic valve of the hydrogen return path of a gas supply unit for the hydrogen return path, and setting, in accordance with the working condition point, an outlet pressure of a pressure regulator and the relative humidity of the hydrogen gas of a humidifying device of the gas supply - feeding unit of the hydrogen return path; (4) testing, under different operating conditions, a change in the operating characteristic of the ejector; and (5) using the control device to obtain the flow from a main path flow meter and flow from a hydrogen return path flow meter, and analyzing data.
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