CN213779475U - Test system for ejector for fuel cell - Google Patents
Test system for ejector for fuel cell Download PDFInfo
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- CN213779475U CN213779475U CN202023123168.1U CN202023123168U CN213779475U CN 213779475 U CN213779475 U CN 213779475U CN 202023123168 U CN202023123168 U CN 202023123168U CN 213779475 U CN213779475 U CN 213779475U
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Abstract
The utility model provides a test system for ejector for fuel cell, include: the input end of the high-pressure hydrogen path is connected with a high-pressure hydrogen bottle, the output end of the high-pressure hydrogen path is connected with the high-pressure inlet end, and a first electric regulating valve and a first flowmeter are arranged on the high-pressure hydrogen path; the mixed gas circuit comprises a low-pressure nitrogen-hydrogen gas circuit, a steam gas circuit and a mixed heating tank, the low-pressure nitrogen-hydrogen gas circuit and the steam gas circuit are both connected with the mixed heating tank, the mixed heating tank is connected with the low-pressure inlet end of the ejector to be detected through a connecting pipe, and a second electric regulating valve is arranged on the low-pressure nitrogen-hydrogen gas circuit; the input end of the outlet gas circuit is connected with the outlet end of the ejector to be detected, and the output end of the outlet gas circuit is connected with the buffer tank. The utility model discloses can simulate each operating mode of fuel cell system completely, can control the pressure, the flow of high pressure entry respectively, the component of low pressure entry, temperature, humidity, pressure and the exit pressure of being surveyed the ejector to the performance of being surveyed the ejector under each operating mode of aassessment.
Description
Technical Field
The utility model relates to a test system's technical field especially relates to a test system's technical field that is used for ejector for fuel cell.
Background
The anode subsystem of the pem fuel cell system generally uses a hydrogen circulating pump or/and an ejector to deliver the gas at the outlet of the stack to the inlet of the stack, so as to recycle the unreacted hydrogen and humidify the hydrogen entering the stack. The ejector functions to transport fluid in the anode sub-system, and utilizes a proportional valve or high pressure hydrogen from a hydrogen jet to form a high velocity jet at the nozzle location and a low pressure region around the nozzle to draw gas from the stack outlet of the pem fuel cell system. The gas is subjected to energy exchange in a mixing pipeline and a diffusion pipeline of the ejector, so that low-pressure gas is converted into high-pressure gas, and circulation of hydrogen is realized.
In the development process of the ejector, the performance of the ejector needs to be evaluated so as to judge whether the developed ejector meets the requirements of a fuel cell system. Patent document CN 110838591 a discloses a testing system and a testing method for a fuel cell ejector, which cannot simulate the medium components (mixed gas of hydrogen, nitrogen and water vapor) at the outlet of a stack, and only can test a single medium; secondly, in this document, after the electric heater is installed in the humidifier, the relative humidity of the humidified gas decreases as the temperature of the humidified gas increases after heating, and the gas with 100% relative humidity cannot be generated. Patent document CN 209927167U discloses a fuel cell injector test system, which can only perform a single medium gas test, but cannot simulate a test of a mixed gas medium of hydrogen, nitrogen and water vapor.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a testing system for an injector for a fuel cell, which is used for solving the problem that the testing of the mixed gas medium of hydrogen, nitrogen and water vapor cannot be simulated in the prior art.
To achieve the above and other related objects, the present invention provides a testing system for an injector for a fuel cell, including:
the input end of the high-pressure hydrogen path is connected with the high-pressure hydrogen bottle, the output end of the high-pressure hydrogen path is connected with the high-pressure inlet end of the ejector to be detected, and a first electric regulating valve and a first flowmeter are arranged on the high-pressure hydrogen path;
the mixing gas circuit comprises a low-pressure nitrogen-hydrogen gas circuit, a steam gas circuit and a mixing heating tank, wherein the low-pressure nitrogen-hydrogen gas circuit and the steam gas circuit are both connected with the mixing heating tank, the mixing heating tank is connected with the low-pressure inlet end of the ejector to be detected through a connecting pipe, a second electric regulating valve is arranged on the low-pressure nitrogen-hydrogen gas circuit, a third electric regulating valve is arranged on the steam gas circuit, and a thermometer is arranged on the connecting pipe;
and the input end of the outlet gas circuit is connected with the outlet end of the ejector to be detected, and the output end of the outlet gas circuit is connected with the buffer tank.
Preferably, a manual regulating valve, a pressure detection assembly and a temperature sensor are further arranged on the high-pressure hydrogen pipeline.
Preferably, the pressure detection assembly comprises a first pressure gauge and a second pressure gauge, and the first pressure gauge and the second pressure gauge are respectively arranged on the front side and the rear side of the second electric regulating valve.
Preferably, a second flow meter is arranged on the low-pressure nitrogen-hydrogen gas pipeline between the second electric regulating valve and the mixing and heating tank.
Preferably, the steam gas path is provided with a third flow meter.
Preferably, a pressure gauge and a temperature sensor are arranged on the outlet gas path; a pressure release valve is arranged on the buffer tank.
Preferably, the input end of the low-pressure nitrogen-hydrogen gas path is connected with a gas supply bottle containing mixed gas of hydrogen and nitrogen.
As described above, the utility model discloses a test system for ejector for fuel cell has following beneficial effect:
the utility model discloses can simulate each operating mode of fuel cell system completely, can control the fluidic pressure, the flow of high pressure entry respectively, fluidic component, temperature, humidity, pressure of low pressure entry and the exit pressure of being surveyed the ejector to the performance of being surveyed the ejector under each operating mode of aassessment fuel cell system.
Drawings
Fig. 1 is a schematic diagram of a testing system for an injector for a fuel cell according to the present invention;
description of the element reference numerals
1 high-pressure hydrogen cylinder
2 first manual regulating valve
3 first flowmeter
4 first pressure gauge
5 first electric control valve
6 thermometer
7 second pressure gauge
8 ejector to be measured
9 fifth pressure gauge
10 temperature sensor
11 pressure relief valve
12 buffer tank
13 needle valve
14 air supply bottle
15 second manual regulating valve
16 third pressure gauge
17 second electric control valve
18 second flow meter
19 mixing and heating tank
20 moisture meter
21 temperature sensor
22 fourth pressure gauge
23 steam generator
24 third electric control valve
25 third flow meter
Detailed Description
The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.
Please refer to fig. 1. It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present specification are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, changes of the ratio relationship, or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
As shown in fig. 1, the utility model provides a test system for ejector for fuel cell includes:
the input end of the high-pressure hydrogen path is connected with the high-pressure hydrogen bottle 1, the output end of the high-pressure hydrogen path is connected with the high-pressure inlet end of the ejector 8 to be detected, and a first electric regulating valve 5 and a first flowmeter 3 are arranged on the high-pressure hydrogen path;
the mixed gas path comprises a low-pressure nitrogen-hydrogen gas path, a steam gas path and a mixed heating tank 19, the input end of the steam gas path is connected with a steam generator 23, the low-pressure nitrogen-hydrogen gas path and the steam gas path are both connected with the mixed heating tank 19, the mixed heating tank is connected with the low-pressure inlet end of the tested ejector 8 through a connecting pipe 19, a second electric regulating valve 17 is arranged on the low-pressure nitrogen-hydrogen gas path, a third electric regulating valve 24 is arranged on the steam gas path, and a thermometer 21 is arranged on the connecting pipe;
and the input end of the outlet gas circuit is connected with the outlet end of the tested ejector 8, and the output end of the outlet gas circuit is connected with the buffer tank 11.
The utility model discloses the principle:
the percentages of hydrogen, nitrogen and water vapor under various operations of the fuel cell system are simulated by providing a mixture of nitrogen and hydrogen using the high pressure hydrogen cylinder 1 (containing hydrogen), the low pressure nitrogen-hydrogen gas path and the steam generator 23; and the hydrogen flow rate and the pressure of the high pressure inlet of the ejector 8 to be measured are controlled by the first electric control valve 5, the flow rate of the mixture of nitrogen and hydrogen and the pressure of the low pressure inlet of the ejector 8 to be measured are controlled by the second electric control valve 17, and the steam flow rate is controlled by the third electric control valve 24, respectively.
In addition, the temperature of the low pressure entrance of the ejector 8 to be measured can be adjusted through the mixing and heating tank 19, so that nitrogen and water vapor are fully mixed in the mixing and heating tank 19, the nitrogen and water vapor reach the balance of temperature and humidity and then enter the low pressure entrance of the ejector 8 to be measured, heat insulation layers are arranged on the outside of the mixing and heating tank 19 and the connecting pipes, and the temperature of the low pressure entrance of the ejector 8 to be measured is kept stable.
And comparing the obtained pressure and flow of the high-pressure inlet of the tested ejector 8, the pressure and flow of the low-pressure inlet, and the pressure and temperature of the outlet end of the tested ejector 8 with the design value of the tested ejector 8 to evaluate whether the tested ejector 8 reaches the design target.
In this embodiment, the high-pressure hydrogen pipeline is further provided with a first manual regulating valve 2, a pressure detection assembly and a temperature sensor 6. By adjusting the first manual control valve 2, the first pressure gauge 4 can be brought to 20bar (g) when the first high-pressure gas cylinder 1 is opened.
In this embodiment, the pressure detection unit includes a first pressure gauge 4 and a second pressure gauge 7, and the first pressure gauge 4 and the second pressure gauge 7 are respectively provided on the front and rear sides of the second electrical control valve 17. When the opening degree of the first electric regulating valve 5 is regulated, the pressure value of the second pressure gauge 7 at the high-pressure inlet of the tested ejector 8 can reach a required pressure value (the design value of the tested ejector 8 is determined by the design side of the tested ejector 8). The first electric regulating valve 5 is adopted to regulate the hydrogen pressure of the high-pressure hydrogen path close to the high-pressure inlet of the ejector 8 to be measured, and the first flowmeter 3 is utilized to observe the hydrogen flow passing through the ejector 8 to be measured under the pressure.
In this embodiment, a second flowmeter 18 is arranged on the low-pressure nitrogen-hydrogen gas path between the second electric regulating valve 17 and the mixing and heating tank 19; the second manual regulating valve 15 and the third pressure gauge 16 are arranged between the input end of the low-pressure nitrogen-hydrogen gas path and the second electric regulating valve 17; by adjusting the second manual regulating valve 15 and observing the third pressure gauge 16, the pressure value is equal to about 5bar (g).
In this embodiment, the connecting pipe is further provided with a hygrometer 20 and a fourth pressure gauge 22, and the fourth pressure gauge 22 controls the opening of the second electrical control valve 17 through communication, so that the pressure of the fourth pressure gauge 22 reaches the set pressure. The humidity entering the low pressure inlet of the tested eductor 8 is controlled by a hygrometer 20.
In addition, the thermometer 21 of the low-pressure nitrogen-hydrogen gas path is used as follows: the gas is heated by the mixing and heating tank 19 with the temperature of the thermometer 21 set, and the temperature value and the switch of the heater are controlled in an interlocking manner, wherein the heating is turned on when the temperature of the thermometer 21 is lower than the set temperature by 1 ℃, and the heating is turned off when the temperature of the thermometer 21 is higher than the set temperature by 1 ℃.
In this embodiment, the steam gas path is provided with a third flow meter 25, and the flow rate of the third flow meter 25 can make the steam gas path reach the water vapor content in the gas at the outlet of the fuel cell stack under a certain working condition of the fuel cell system.
In this embodiment, a fifth pressure gauge 9 and a temperature sensor 10 are arranged on the outlet gas path; the buffer tank 12 is provided with a relief valve 11. A needle valve 13 is arranged at the outlet of the buffer tank 12, the outlet pressure of the tested ejector 8 is controlled through the needle valve 13, and meanwhile, the buffer tank 12 is arranged at the outlet of the tested ejector 8 to keep the outlet pressure of the tested ejector 8 stable; meanwhile, a pressure release valve 11 is arranged on the buffer tank 12, so that the outlet pressure of the tested ejector 8 is prevented from being too high during misoperation, and the safety of the system during testing is kept. When the opening degree of the needle valve 13 is adjusted, the pressure value of the fifth pressure gauge 9 is observed at the same time, and the pressure value is made to reach the pressure required by a certain working condition of the fuel cell system.
The input end of the low-pressure nitrogen-hydrogen gas circuit is connected with a gas supply bottle 14 containing mixed gas of hydrogen and nitrogen, and the purpose of directly simulating different percentages of hydrogen, nitrogen and water vapor is achieved through direct mixing.
In addition to the above embodiments, the specific application method of the present invention is as follows:
1. the opening degree of the needle valve 13 is adjusted to about a half opening degree.
2. And opening the steam generator 23, and adjusting the third electric regulating valve 24 to enable the flow of the third flow meter 25 to reach the steam flow in the outlet gas of the electric pile under a certain working condition of the fuel cell system.
3. The input of the low pressure nitrogen-hydrogen circuit is opened and the second manual regulating valve 15 is adjusted while observing the third pressure gauge 16, making this pressure equal to about 5bar (g).
4. The target pressure (the pressure value at the low-pressure inlet of the ejector under a certain working condition of the fuel cell system) of the fourth pressure gauge 22 is set, and the opening degree of the second electric control valve 17 is controlled in an interlocking manner by a program, so that the pressure of the fourth pressure gauge 22 reaches the set pressure.
5. The temperature of the thermometer 21 (the temperature value of the low-pressure inlet of the ejector under a certain working condition of the fuel cell system) is set, the gas is heated by the heater of the mixing and heating tank 19, the temperature value and the switch of the heater are controlled in an interlocking way, the heater is turned on when the temperature of the thermometer 21 is lower than the set temperature by 1 ℃, and the heater is turned off when the temperature of the thermometer 21 is higher than the set temperature by 1 ℃.
6. When the temperature of the thermometer 21 reaches the design value, the first high-pressure gas cylinder 1 is opened, and the first manual regulating valve 2 is regulated to make the pressure value of the first pressure gauge 4 reach 20bar (G).
7. The opening degree of the first electric regulating valve 5 is regulated, so that the pressure value of the second pressure gauge 7 at the high-pressure inlet of the tested ejector 8 reaches the pressure value required under the working condition (the value is the design value of the tested ejector 8 and is determined by the design side of the tested ejector 8).
8. The opening degree of the needle valve 13 is adjusted, and the pressure value of the fifth pressure gauge 9 is observed to reach the pressure required by a certain working condition of the fuel cell system.
9. Recording the flow value of the first flowmeter 3, the temperature value of the temperature sensor 6, the pressure value of the pressure sensor 7, the flow value of the second flowmeter 18 and the flow value of the third flowmeter 25, calculating the difference between the measured value and the designed value, judging whether the measured ejector 8 reaches the designed target, simultaneously calculating the actual ejector ratio of the measured ejector 8 and evaluating the performance of the ejector.
And changing the working condition parameters of the tested ejector, and repeating the steps to finish the simulation test of all the working conditions.
To sum up, the utility model discloses can simulate each operating mode of fuel cell system completely, can control high pressure entry fluidic pressure, flow respectively, fluidic component, temperature, humidity, pressure of low pressure entry and the exit pressure of being surveyed ejector 8 to the performance of being surveyed ejector 8 under each operating mode of aassessment fuel cell system.
Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A test system for an injector for a fuel cell, comprising:
the input end of the high-pressure hydrogen path is connected with a high-pressure hydrogen bottle, the output end of the high-pressure hydrogen path is connected with the high-pressure inlet end of the ejector to be detected, and a first electric regulating valve and a first flowmeter are arranged on the high-pressure hydrogen path;
the low-pressure nitrogen-hydrogen gas circuit and the steam gas circuit are connected with the mixing heating tank, the mixing heating tank is connected with the low-pressure inlet end of the ejector to be detected through a connecting pipe, a second electric regulating valve is arranged on the low-pressure nitrogen-hydrogen gas circuit, a third electric regulating valve is arranged on the steam gas circuit, and a thermometer is arranged on the connecting pipe;
and the input end of the outlet gas circuit is connected with the outlet end of the ejector to be detected, and the output end of the outlet gas circuit is connected with the buffer tank.
2. The test system for an injector for a fuel cell according to claim 1, wherein: still be equipped with first manual regulation valve, pressure measurement subassembly and temperature sensor on the high pressure hydrogen way.
3. The test system for an injector for a fuel cell according to claim 2, wherein: the pressure detection assembly comprises a first pressure gauge and a second pressure gauge, and the first pressure gauge and the second pressure gauge are respectively arranged on the front side and the rear side of the second electric regulating valve.
4. The test system for an injector for a fuel cell according to claim 1, wherein: and a second flowmeter is arranged on the low-pressure nitrogen-hydrogen gas path between the second electric regulating valve and the mixing and heating tank.
5. The test system for an injector for a fuel cell according to claim 1, wherein: and a third flow meter is arranged on the steam gas path.
6. The test system for an injector for a fuel cell according to claim 1, wherein: a pressure gauge and a temperature sensor are arranged on the outlet gas path; and a pressure release valve is arranged on the buffer tank.
7. The test system for an injector for a fuel cell according to claim 1, wherein: and the input end of the low-pressure nitrogen-hydrogen gas circuit is connected with a gas supply bottle containing hydrogen and nitrogen mixed gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023123168.1U CN213779475U (en) | 2020-12-22 | 2020-12-22 | Test system for ejector for fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023123168.1U CN213779475U (en) | 2020-12-22 | 2020-12-22 | Test system for ejector for fuel cell |
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| CN213779475U true CN213779475U (en) | 2021-07-23 |
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| CN202023123168.1U Active CN213779475U (en) | 2020-12-22 | 2020-12-22 | Test system for ejector for fuel cell |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354162A (en) * | 2021-12-29 | 2022-04-15 | 新源动力股份有限公司 | System and method for testing hydrogen system sub-component for fuel cell system |
| CN114899456A (en) * | 2022-06-13 | 2022-08-12 | 南通理工学院 | Pulse type ejector testing device and method for fuel cell |
| WO2024139678A1 (en) * | 2022-12-30 | 2024-07-04 | 中国石油天然气股份有限公司 | Steam flow control nozzle, design method therefor, and test system thereof |
-
2020
- 2020-12-22 CN CN202023123168.1U patent/CN213779475U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114354162A (en) * | 2021-12-29 | 2022-04-15 | 新源动力股份有限公司 | System and method for testing hydrogen system sub-component for fuel cell system |
| CN114899456A (en) * | 2022-06-13 | 2022-08-12 | 南通理工学院 | Pulse type ejector testing device and method for fuel cell |
| CN114899456B (en) * | 2022-06-13 | 2023-04-28 | 南通理工学院 | Pulse ejector testing device and method for fuel cell |
| WO2024139678A1 (en) * | 2022-12-30 | 2024-07-04 | 中国石油天然气股份有限公司 | Steam flow control nozzle, design method therefor, and test system thereof |
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