CN114914487B - Device and method for measuring air supply humidity of hydrogen fuel cell test bench - Google Patents
Device and method for measuring air supply humidity of hydrogen fuel cell test bench Download PDFInfo
- Publication number
- CN114914487B CN114914487B CN202210511833.9A CN202210511833A CN114914487B CN 114914487 B CN114914487 B CN 114914487B CN 202210511833 A CN202210511833 A CN 202210511833A CN 114914487 B CN114914487 B CN 114914487B
- Authority
- CN
- China
- Prior art keywords
- pressure
- hydrogen
- fuel cell
- air
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000001257 hydrogen Substances 0.000 title claims abstract description 135
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 135
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 134
- 239000000446 fuel Substances 0.000 title claims abstract description 78
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 15
- 239000007789 gas Substances 0.000 claims abstract description 62
- 230000000087 stabilizing effect Effects 0.000 claims description 28
- 230000006641 stabilisation Effects 0.000 claims description 21
- 238000011105 stabilization Methods 0.000 claims description 21
- 238000005259 measurement Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000005587 bubbling Effects 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 2
- 238000000691 measurement method Methods 0.000 abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 239000000523 sample Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The present disclosure discloses a hydrogen fuel cell test stand air supply humidity measuring device, comprising: the device comprises a mass flow controller, a humidifying module and a control module, wherein the output end of the mass flow controller is connected with the input end of the humidifying module, and the humidifying module is used for humidifying the mixed gas consisting of hydrogen and air which is output by the mass flow controller; the output end of the humidifying module is connected with the input end of the hydrogen fuel cell, and the humidified mixed gas enters the hydrogen fuel cell through the input end; the control module is used for controlling the humidifying module so that the relative humidity of the mixed gas to be fed into the hydrogen fuel cell reaches the preset relative humidity of the mixed gas. The utility model also discloses a measurement method of the air supply humidity of the hydrogen fuel cell test bench, which is used for collecting the pressure and the temperature of the outlet gas of the humidifying module and the mixed gas to be fed into the hydrogen fuel cell, and indirectly obtaining the real moisture content and the real relative humidity of the gas to be fed into the fuel cell through calculation.
Description
Technical Field
The disclosure belongs to the technical field of hydrogen fuel cell testing equipment, and particularly relates to a device and a method for measuring air supply humidity of a hydrogen fuel cell test bench.
Background
The hydrogen fuel cell is a power generation device which uses hydrogen and oxygen as reaction gases and converts chemical energy into electric energy through electrochemical reaction, has the advantages of high energy conversion efficiency, low-temperature operation, low noise pollution, zero emission and the like, and is regarded as one of the most promising green power generation systems. In the development process of the hydrogen fuel cell, in order to obtain indexes such as working performance and service life, performance, durability and the like of the hydrogen fuel cell are required to be tested by utilizing a hydrogen fuel cell test bench. The hydrogen fuel cell test bench provides hydrogen and air for the hydrogen fuel cell, and simultaneously controls the temperature of the cell, thereby meeting the requirements of research and development and performance test of the hydrogen fuel cell. In the supply of hydrogen and air, it is necessary to precisely control the temperature, humidity, pressure, and flow rate of the supplied gas.
The supply air humidity is a parameter that has a significant impact on the performance of the hydrogen fuel cell, and therefore accurate humidity control is particularly important for hydrogen fuel cell test benches. The humidity sensor is used for acquiring the air supply humidity in real time, the humidity sensor is arranged at an air supply inlet pipeline of the fuel cell to detect the air supply humidity and regulate and control the humidifying module to control the humidity, but under a high humidity environment, the probe of the humidity sensor is extremely easy to dew, the humidity measurement precision is affected, the service life of the probe is shorter, and the probe must be returned to a factory for replacement and measurement calibration after one or two years of normal use. For hydrogen fuel cell test benches that require long-term operation, the use of a humidity sensor to control the supply air humidity is clearly unsuitable. The existing hydrogen fuel cell testing equipment calculates the moisture content and the dew point temperature of the supplied air through the set air supply parameters, and controls the outlet temperature of the humidifying module to be equal to the dew point temperature, thereby controlling the humidity of the supplied air. The humidifying module can realize humidification, and the outlet gas is saturated wet gas. However, because the pressure difference exists between the saturated wet gas at the outlet of the humidifying module and the wet gas at the inlet of the hydrogen fuel cell, the moisture content of the saturated wet gas at the outlet of the humidifying module is lower than that of the wet gas at the inlet of the set cell, so that the humidity of the actual supplied gas is lower than a set value, and a deviation is brought to a test result.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore may contain information that does not form the prior art that is already known in the country to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for measuring the air supply humidity of a hydrogen fuel cell, which can solve the problem that the air supply humidity of a traditional hydrogen fuel cell test bench has deviation so as to influence the test result of the hydrogen fuel cell.
In order to achieve the above object, the present disclosure provides the following technical solutions:
a hydrogen fuel cell supply air humidity measurement device comprising: a mass flow controller, a humidifying module, a voltage stabilizing module and a control module, wherein,
The output end of the mass flow controller is connected with the input end of the humidifying module, and the humidifying module is used for humidifying the hydrogen or the air output by the mass flow controller;
the output end of the humidifying module is connected with the input end of the voltage stabilizing module, and humidified hydrogen or air enters the hydrogen fuel cell after being stabilized by the voltage stabilizing module;
the control module is used for controlling the humidifying module so that the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after being stabilized by the voltage stabilizing module reaches a preset relative humidity.
Preferably, the control module includes:
the collecting sub-module is used for collecting the pressure value and the temperature value of the humidified hydrogen or air and recording the pressure value and the temperature value as a first pressure value and a first temperature value; the pressure value and the temperature value of the hydrogen or air to be introduced into the hydrogen fuel cell after the pressure stabilization are collected and recorded as a second pressure value and a second temperature value;
The calculation sub-module is used for calculating the moisture content of the humidified hydrogen or air according to the first pressure value and the first temperature value, and calculating the relative humidity of the hydrogen or air to be introduced into the hydrogen fuel cell after pressure stabilization according to the moisture content, the second pressure value and the second temperature value;
and the control sub-module is used for comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after the pressure stabilization with the preset relative humidity, and controlling the humidifying module to adjust the moisture content of the hydrogen or air according to the comparison result.
Preferably, the collecting submodule comprises a temperature sensor and a pressure sensor.
Preferably, the computation submodule and the control submodule both adopt single-chip microcomputer chips.
Preferably, the humidification module includes any one of the following: bubbling humidifiers, spraying humidifiers, and membrane humidifiers.
Preferably, the apparatus further comprises a heat exchanger.
Preferably, the device further comprises a heating belt.
The disclosure also provides a method for measuring the humidity of the supplied gas of the hydrogen fuel cell test stand, comprising the following steps:
S100: setting the flow, pressure, temperature and relative humidity of hydrogen or air before humidification;
s200: collecting the pressure value and the temperature value of the humidified hydrogen or air, and recording the pressure value and the temperature value as a first pressure value and a first temperature value;
S300: sampling the first pressure value and the first temperature value to obtain sampling data, and processing the sampling data to obtain the true moisture content of the humidified hydrogen or air;
S400: collecting the pressure value and the temperature value of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization, recording the pressure value and the temperature value as a second pressure value and a second temperature value, and calculating the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization according to the actual moisture content obtained in the step S300 and the second pressure value and the second temperature value;
S500: and (3) comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after the pressure stabilization obtained in the step (400) with the relative humidity of the hydrogen or air set in the step (100), and returning to the step (200) to adjust the moisture content of the hydrogen or air according to the comparison result.
Compared with the prior art, the beneficial effects that this disclosure brought are:
(1) The method and the device measure the temperature and the pressure of the gas through the sensor, obtain accurate air supply moisture content and relative humidity, and compared with the traditional humidity control of the hydrogen fuel cell testing equipment, the air supply humidity control of the hydrogen fuel cell by utilizing the calculated relative humidity is more accurate;
(2) According to the pressure stabilizing device, the pressure stabilizing module is additionally arranged behind the humidifying module, so that fluctuation of gas pressure can be reduced, and measurement of the first pressure sensor is facilitated; meanwhile, the voltage stabilizing module can reduce liquid water drops possibly existing in the air supply, so that negative influences of the liquid water in the air supply on the test equipment and the hydrogen fuel cell are reduced.
Drawings
FIG. 1 is a schematic view of a hydrogen fuel cell test stand gas supply apparatus according to one embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a voltage regulation module according to another embodiment of the present disclosure;
FIG. 3 is a flow chart of a method for measuring humidity of a hydrogen fuel cell test stand supplied gas provided in another embodiment of the present disclosure;
the labels in the drawings are illustrated as follows:
1-a mass flow controller; 2-a humidifying module; 3-a voltage stabilizing module; 4-a first temperature sensor; a 5-heat exchanger; 6-heating the belt; 7-a second pressure sensor; 8-a second temperature sensor; a 9-hydrogen fuel cell; 10-a first pressure sensor; 11-a gas outlet end; 12-a water outlet; 13-a gas inlet end; 14-separator.
Detailed Description
Specific embodiments of the present disclosure will be described in detail below with reference to fig. 1 to 3. While specific embodiments of the disclosure are shown in the drawings, it should be understood that the disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. Those of skill in the art will understand that a person may refer to the same component by different names. The specification and claims do not identify differences in terms of components, but rather differences in terms of the functionality of the components. As used throughout the specification and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description hereinafter sets forth the preferred embodiments for carrying out the present disclosure, but is not intended to limit the scope of the disclosure in general, as the description proceeds. The scope of the present disclosure is defined by the appended claims.
For the purposes of promoting an understanding of the embodiments of the disclosure, reference will now be made to the embodiments illustrated in the drawings and specific examples, without the intention of being limiting the embodiments of the disclosure.
In one embodiment, as shown in fig. 1, the present disclosure provides a hydrogen fuel cell supply air humidity measurement device, comprising: a mass flow controller 1, a humidifying module 2, a pressure stabilizing module 3 and a control module, wherein,
The output end of the mass flow controller 1 is connected with the input end of the humidifying module 2, and the humidifying module 2 is used for humidifying the hydrogen or the air output by the mass flow controller 1;
The output end of the humidifying module 2 is connected with the input end of the voltage stabilizing module 3, and humidified hydrogen or air enters the hydrogen fuel cell 9 after being stabilized by the voltage stabilizing module;
The control module is used for controlling the humidifying module 2 so that the relative humidity of the hydrogen or air to be introduced into the hydrogen fuel cell 9 after being stabilized by the voltage stabilizing module reaches a preset relative humidity.
In another embodiment, the control module includes:
the collecting sub-module is used for collecting the pressure value and the temperature value of the humidified hydrogen or air and recording the pressure value and the temperature value as a first pressure value and a first temperature value; the pressure value and the temperature value of the hydrogen or air to be introduced into the hydrogen fuel cell after the pressure stabilization are collected and recorded as a second pressure value and a second temperature value;
The calculation sub-module is used for calculating the moisture content of the humidified hydrogen or air according to the first pressure value and the first temperature value, and calculating the relative humidity of the hydrogen or air to be introduced into the hydrogen fuel cell after pressure stabilization according to the moisture content, the second pressure value and the second temperature value;
and the control sub-module is used for comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after the pressure stabilization with the preset relative humidity, and controlling the humidifying module to adjust the moisture content of the hydrogen or air according to the comparison result.
In another embodiment, the apparatus further includes a voltage stabilizing module 3, and the voltage stabilizing module 3 includes: the gas-liquid separator comprises a cavity, wherein one side of the cavity is provided with a gas inlet end 13, the other side of the cavity is provided with a gas outlet end 11, and a water outlet 12 is arranged on the same side of the cavity as the gas outlet end 11.
In this embodiment, after the gas enters the cavity, the pressure fluctuation is relieved, so as to stabilize the pressure of the gas.
In another embodiment, the pressure stabilizing module further includes a partition 14 for separating liquid water droplets carried in the gas.
In this embodiment, by providing the separator, liquid water droplets in the gas can be isolated, so as to avoid damage to the hydrogen fuel cell caused by entering the liquid water droplets.
In another embodiment, the acquisition submodule includes a temperature sensor and a pressure sensor.
In the present embodiment, the temperature sensor includes a first temperature sensor 4 and a second temperature sensor 8; the pressure sensor comprises a first pressure sensor 10 and a second pressure sensor 7. The first temperature sensor is arranged at the gas outlet end of the pressure stabilizing module and is used for measuring the temperature value of the hydrogen or air after pressure stabilization; the first pressure sensor is arranged on the pressure stabilizing module and used for measuring the gas pressure value in the cavity of the pressure stabilizing module. The second pressure sensor and the second temperature sensor are arranged at the inlet of the hydrogen fuel cell and are used for measuring the pressure value and the temperature value of the gas to be introduced into the hydrogen fuel cell after pressure stabilization.
In another embodiment, the computation submodule and the control submodule both adopt a single-chip microcomputer chip.
All the singlechip chips with calculation function and control function can be used in the embodiment, and the embodiment does not aim to improve the singlechip chips.
In another embodiment, the humidification module includes any one of: bubbling humidifiers, spraying humidifiers, and membrane humidifiers.
In another embodiment, the apparatus further comprises a heat exchanger 5.
In this embodiment, the heat exchanger is provided for the purpose of controlling the temperature of the gas to be introduced into the hydrogen fuel cell so that the gas humidity is maintained in a relatively stable state.
In another embodiment, the device further comprises a heating belt 6.
In this embodiment, the heating band twines on gas transmission pipeline, mainly plays the heat retaining effect, prevents that gas from leading to humidity to reduce because of condensation, cooling in the pipeline.
In another embodiment, the present disclosure further provides a method for measuring the humidity of the supplied gas of a hydrogen fuel cell test stand, including the steps of:
S100: setting the flow, pressure, temperature and relative humidity of hydrogen or air before humidification;
In this step, the flow rate of hydrogen or air to be introduced into the hydrogen fuel cell is first set Pressure and forceTemperature (temperature)Relative humidity ofThen the dew point temperature of the hydrogen or air is calculated according to the parameters, namely
（1）
Wherein,Is the temperatureThe saturated vapor pressure of the water vapor;
And, in addition, the method comprises the steps of, And temperature(Temperature)With kelvin temperature) is as follows:
（2）
the control module executes a control strategy to enable the flow of the mass flow controller to reach a set value ; The dew point temperature of the gas controlled by the humidifying module reaches the calculated value of the formula (1); The temperature of the gas entering the hydrogen fuel cell reaches a set valueThe gas pressure reaches the set value。
S200: collecting the pressure value and the temperature value of the humidified hydrogen or air, and recording the pressure value and the temperature value as a first pressure value and a first temperature value;
in this step, the measured value of the first pressure sensor 10 is acquired And the measured value of the first temperature sensor 4Wherein the sampling time is(Sampling time)Depending on the sensor and system hardware, 300 ms may be selected).
S300: sampling the first pressure value and the first temperature value to obtain sampling data, and processing the sampling data to obtain the true moisture content of the humidified hydrogen or air;
in this step, extract Within a time period (time period)The pressure data and the temperature data which can be set to 30 s) are set by a user, and the data are subjected to noise reduction treatment (the existing noise reduction method is adopted); after the noise reduction treatment, arithmetic average is carried out to obtain the average pressure of saturated wet gas output by the voltage stabilizing module 3And average temperatureFurther calculating the true moisture content of the humidified hydrogen or airThe calculation formula is as follows:
（3）
wherein, Is the molar mass of water; the molar mass of the gas is hydrogen or air.
S400: collecting the pressure value and the temperature value of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization, recording the pressure value and the temperature value as a second pressure value and a second temperature value, and calculating the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization according to the actual moisture content obtained in the step S200 and the second pressure value and the second temperature value;
In this step, the moisture content obtained in step S300 Measured values obtained by measurement of the second pressure sensorAnd a measured value obtained by measurement of the second temperature sensorCalculating the relative humidity of the gas input into the hydrogen fuel cellI.e.
（4）
S500: and (3) comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after the pressure stabilization obtained in the step (400) with the relative humidity of the hydrogen or air set in the step (100), and returning to the step (200) to adjust the moisture content of the hydrogen or air according to the comparison result.
In this step, the calculation is performedAnd the set valueComparing ifGreater thanControlling the humidifying module to reduce the temperature of the outlet gas; if it isLess thanAnd controlling the humidifying module to increase the temperature of the outlet gas so as to realize accurate gas humidity supply of the fuel cell test bench.
The method of the present disclosure is further described below by way of a specific example.
Assuming the supply air is air, the dry gas flow rate into the fuel cell stack is 6000 NLPM, the gas temperature is 80 ℃, the inlet air pressure is 200kPa, and the inlet air relative humidity is 0.85. Further, there is a pressure between the outlet of the humidification module 2 and the hydrogen fuel cell 9, and the gas pressure at the outlet of the humidification module 2 is 220kPa assuming a gas pressure difference of 20kPa at the current supply gas flow rate.
Calculating dew point temperature using equations (1) and (2)76.0 ℃. According to the prior art, the humidity control of the supplied air is to control the temperature of the saturated wet gas at the outlet of the humidifying module 2 to be 76.0 ℃, and at this time, the actual moisture content of the supplied air can be calculated to be 0.1393kg/kg according to the formula (3). The gas is not condensed between the humidification module 2 and the hydrogen fuel cell 9, and the moisture content remains unchanged. According to the formula (4), the current real relative humidity of the intake air can be calculatedIs 0.771, is lower than the inlet air humidity set point of 0.85. The calculation result effectively illustrates the inaccuracy of the existing humidity measurement method.
With the humidity measurement method of the present disclosure, the first temperature sensor measurement value, the first pressure sensor measurement value, the second temperature sensor measurement value, and the second pressure sensor measurement value, which are measured in real time, calculate the real-time relative humidity of the supplied air by the measurement method shown in fig. 3By controlling the humidifying module, the air conditioner makesEqual to the set point of 0.85. At this time, the dew point temperature to be set is 78.2 ℃ and higher than the dew point temperature set in the prior art is 76.0 ℃, which satisfies the intake air humidity of the hydrogen fuel cell 9 being 0.85.
While the apparatus and method for measuring the air supply humidity of a hydrogen fuel cell test stand provided by the present disclosure have been described in detail with reference to specific embodiments, the description of the embodiments is only for aiding in understanding the method and core ideas of the present disclosure, and those skilled in the art will vary in terms of specific embodiments and application scope according to the ideas of the present disclosure. Accordingly, the present disclosure should not be construed as limiting the present disclosure.
Claims (6)
1. A hydrogen fuel cell test stand supply air humidity measurement device comprising: a mass flow controller, a humidifying module, a voltage stabilizing module and a control module, wherein,
The output end of the mass flow controller is connected with the input end of the humidifying module, and the humidifying module is used for humidifying the hydrogen or the air output by the mass flow controller;
The output end of the humidifying module is connected with the input end of the voltage stabilizing module, and humidified hydrogen or air enters the hydrogen fuel cell after being stabilized by the voltage stabilizing module; the control module is used for controlling the humidifying module so that the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after being stabilized by the voltage stabilizing module reaches a preset relative humidity;
The pressure stabilizing module comprises a cavity, wherein one side of the cavity is provided with a gas inlet end, the other side of the cavity is provided with a gas outlet end, and a water outlet is arranged on the same side as the gas outlet end; the pressure stabilizing module further comprises a partition plate for separating liquid water drops carried in the gas;
the control module includes:
the collecting sub-module is used for collecting the pressure value and the temperature value of the humidified hydrogen or air and recording the pressure value and the temperature value as a first pressure value and a first temperature value; the pressure value and the temperature value of the hydrogen or air to be introduced into the hydrogen fuel cell after the pressure stabilization are collected and recorded as a second pressure value and a second temperature value;
The calculation sub-module is used for calculating the moisture content of the humidified hydrogen or air according to the first pressure value and the first temperature value, and calculating the relative humidity of the hydrogen or air to be introduced into the hydrogen fuel cell after pressure stabilization according to the moisture content, the second pressure value and the second temperature value;
the control sub-module is used for comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization with the preset relative humidity, and controlling the humidifying module to adjust the moisture content of the hydrogen or air according to the comparison result;
The collecting submodule comprises a temperature sensor and a pressure sensor, the temperature sensor comprises a first temperature sensor and a second temperature sensor, the pressure sensor comprises a first pressure sensor and a second pressure sensor, the first temperature sensor is arranged at the gas outlet end of the pressure stabilizing module and is used for measuring the temperature value of hydrogen or air after pressure stabilization and recording the temperature value as a first temperature value; the first pressure sensor is arranged on the pressure stabilizing module and is used for measuring the pressure value of the gas in the cavity of the pressure stabilizing module and recording the pressure value as a first pressure value; the second pressure sensor and the second temperature sensor are arranged at the inlet of the hydrogen fuel cell and are used for measuring the pressure value and the temperature value of the gas to be fed into the hydrogen fuel cell and recording the pressure value and the temperature value as a second pressure value and a second temperature value.
2. The apparatus of claim 1, wherein the computation submodule and the control submodule each employ a single-chip microcomputer chip.
3. The apparatus of claim 1, wherein the humidification module comprises any one of: bubbling humidifiers, spraying humidifiers, and membrane humidifiers.
4. The apparatus of claim 1, wherein the apparatus further comprises a heat exchanger.
5. The device of claim 1, wherein the device further comprises a heating belt.
6. A method for measuring the humidity of the supplied gas of a hydrogen fuel cell test stand based on the device of claim 1, comprising the steps of:
S100: setting the flow, pressure, temperature and relative humidity of hydrogen or air before humidification;
s200: collecting the pressure value and the temperature value of the humidified hydrogen or air, and recording the pressure value and the temperature value as a first pressure value and a first temperature value;
S300: sampling the first pressure value and the first temperature value to obtain sampling data, and processing the sampling data to obtain the true moisture content of the humidified hydrogen or air;
S400: collecting the pressure value and the temperature value of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization, recording the pressure value and the temperature value as a second pressure value and a second temperature value, and calculating the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after pressure stabilization according to the actual moisture content obtained in the step S300 and the second pressure value and the second temperature value;
S500: and (3) comparing the relative humidity of the hydrogen or air to be fed into the hydrogen fuel cell after the pressure stabilization obtained in the step (400) with the relative humidity of the hydrogen or air set in the step (100), and returning to the step (200) to adjust the moisture content of the hydrogen or air according to the comparison result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210511833.9A CN114914487B (en) | 2022-05-10 | 2022-05-10 | Device and method for measuring air supply humidity of hydrogen fuel cell test bench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210511833.9A CN114914487B (en) | 2022-05-10 | 2022-05-10 | Device and method for measuring air supply humidity of hydrogen fuel cell test bench |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114914487A CN114914487A (en) | 2022-08-16 |
| CN114914487B true CN114914487B (en) | 2024-05-17 |
Family
ID=82767093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210511833.9A Active CN114914487B (en) | 2022-05-10 | 2022-05-10 | Device and method for measuring air supply humidity of hydrogen fuel cell test bench |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114914487B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007095446A (en) * | 2005-09-28 | 2007-04-12 | Yokogawa Electric Corp | Gas supply control device and gas supply control method |
| JP2008027674A (en) * | 2006-07-19 | 2008-02-07 | Nissan Motor Co Ltd | Humidifier for fuel cell |
| WO2008034253A1 (en) * | 2006-09-19 | 2008-03-27 | Hyteon Inc. | Control of relative humidity in fuel cell systems |
| JP2009129749A (en) * | 2007-11-26 | 2009-06-11 | Honda Motor Co Ltd | Control device of fuel cell system |
| KR20100132194A (en) * | 2009-06-09 | 2010-12-17 | 금오공과대학교 산학협력단 | Control of humidification and dew condensation in the unit cell pemfc |
| CN203895548U (en) * | 2013-12-11 | 2014-10-22 | 同济大学 | Humidifying system of high-power fuel cell |
| KR20150071739A (en) * | 2013-12-18 | 2015-06-29 | 현대자동차주식회사 | Humidity control system for fuel cell |
| CN104885277A (en) * | 2012-12-26 | 2015-09-02 | 丰田自动车株式会社 | Fuel cell system and method for restoring electric power generation performance of fuel cells in fuel cell system |
| CN108232250A (en) * | 2017-12-29 | 2018-06-29 | 萍乡北京理工大学高新技术研究院 | One proton exchanging film fuel battery air humidity control system and method |
| CN110649290A (en) * | 2019-08-28 | 2020-01-03 | 武汉中极氢能产业创新中心有限公司 | Testing device for fuel cell humidification system |
| CN111947952A (en) * | 2020-07-13 | 2020-11-17 | 山东大学 | Fuel cell humidifier test system and test method |
| CN113471481A (en) * | 2021-06-30 | 2021-10-01 | 潍柴动力股份有限公司 | Air inlet control device of fuel cell testing equipment |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101293961B1 (en) * | 2010-12-09 | 2013-08-07 | 기아자동차주식회사 | Cotroller for estimating relative humidity and condensed water |
| CN111640968B (en) * | 2020-06-19 | 2021-04-30 | 电子科技大学 | Bubbling and spraying combined humidifier and fuel cell humidification system used for same |
| CN112234230B (en) * | 2020-07-20 | 2023-06-27 | 武汉长海高新技术有限公司 | Temperature and humidity control system and method for fuel cell test gas |
| CN113555589A (en) * | 2021-08-26 | 2021-10-26 | 廊坊琦睿电池科技有限公司 | Device for simulating fuel cell stack working condition and automatic control method |
| CN216213581U (en) * | 2021-09-07 | 2022-04-05 | 潍柴巴拉德氢能科技有限公司 | Proton exchange membrane fuel cell stack humidifying device and engine |
-
2022
- 2022-05-10 CN CN202210511833.9A patent/CN114914487B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007095446A (en) * | 2005-09-28 | 2007-04-12 | Yokogawa Electric Corp | Gas supply control device and gas supply control method |
| JP2008027674A (en) * | 2006-07-19 | 2008-02-07 | Nissan Motor Co Ltd | Humidifier for fuel cell |
| WO2008034253A1 (en) * | 2006-09-19 | 2008-03-27 | Hyteon Inc. | Control of relative humidity in fuel cell systems |
| JP2009129749A (en) * | 2007-11-26 | 2009-06-11 | Honda Motor Co Ltd | Control device of fuel cell system |
| KR20100132194A (en) * | 2009-06-09 | 2010-12-17 | 금오공과대학교 산학협력단 | Control of humidification and dew condensation in the unit cell pemfc |
| CN104885277A (en) * | 2012-12-26 | 2015-09-02 | 丰田自动车株式会社 | Fuel cell system and method for restoring electric power generation performance of fuel cells in fuel cell system |
| CN203895548U (en) * | 2013-12-11 | 2014-10-22 | 同济大学 | Humidifying system of high-power fuel cell |
| KR20150071739A (en) * | 2013-12-18 | 2015-06-29 | 현대자동차주식회사 | Humidity control system for fuel cell |
| CN108232250A (en) * | 2017-12-29 | 2018-06-29 | 萍乡北京理工大学高新技术研究院 | One proton exchanging film fuel battery air humidity control system and method |
| CN110649290A (en) * | 2019-08-28 | 2020-01-03 | 武汉中极氢能产业创新中心有限公司 | Testing device for fuel cell humidification system |
| CN111947952A (en) * | 2020-07-13 | 2020-11-17 | 山东大学 | Fuel cell humidifier test system and test method |
| CN113471481A (en) * | 2021-06-30 | 2021-10-01 | 潍柴动力股份有限公司 | Air inlet control device of fuel cell testing equipment |
Non-Patent Citations (2)
| Title |
|---|
| "Effect of Relative Humidity and Temperature on the Mechanical Properties of PFSA Nafion™-cation-exchanged membranes for Electrochemical Applications";Wikus Kirsten 等;《Int. J. Electrochem. Sci.》;第第12卷卷;第2573 – 2582页 * |
| 热质交换相似理论在湿氢气湿度测量中的应用;蒋能照 等;制冷(第03期);第35-39页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114914487A (en) | 2022-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201237636Y (en) | Fuel cell test system | |
| CN107908209B (en) | Fuel cell test platform and temperature and humidity control system thereof | |
| CN104155611B (en) | Alternating-current impedance analytical method of electrochemical energy storage device and analytical method of working state of electrochemical energy storage device | |
| US8551664B2 (en) | Fuel cell humidifier diagnostic | |
| CN112234230B (en) | Temperature and humidity control system and method for fuel cell test gas | |
| CN107591548B (en) | Fuel cell humidifier test platform | |
| CN106410243B (en) | A kind of fuel cell experimental bench looped system and its working method | |
| CN106450385B (en) | A kind of fuel cell experimental bench safety control system and its working method | |
| US20050153180A1 (en) | Functional test and demonstration apparatus for fuel cell power system | |
| CN215578649U (en) | Fuel cell water balance test system | |
| CN106324355A (en) | AC impedance test system and method for electrochemical device | |
| CN112271311A (en) | Control system and method of fuel cell | |
| CN115577529B (en) | Modeling simulation method for humidifier of fuel cell system | |
| CN114171760A (en) | Fuel cell testing method combined with simulation model | |
| CN114361512A (en) | Fuel cell drainage and impurity removal control system and control method | |
| US9853312B2 (en) | Method for determining membrane protonic resistance of a fuel cell stack | |
| CN209783927U (en) | Fuel cell membrane humidifier test system | |
| CN114993717A (en) | Performance testing device for fuel cell membrane humidifier | |
| CN114914487B (en) | Device and method for measuring air supply humidity of hydrogen fuel cell test bench | |
| EP1555706A1 (en) | Functional test and demonstration apparatus for fuel cell power system | |
| CN101556212B (en) | Performance test system for fuel cell humidifier | |
| WO2008034253A1 (en) | Control of relative humidity in fuel cell systems | |
| CN100479249C (en) | Air supply system of fuel cell with measurable humidity and humidity measuring method | |
| CN114759225B (en) | Testing system and testing method for water-gas separator of fuel cell | |
| CN111709149A (en) | Proton exchange membrane fuel cell stack cold start capability evaluation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |