CN115117399A - Gas humidifying device for fuel cell test - Google Patents
Gas humidifying device for fuel cell test Download PDFInfo
- Publication number
- CN115117399A CN115117399A CN202210948044.1A CN202210948044A CN115117399A CN 115117399 A CN115117399 A CN 115117399A CN 202210948044 A CN202210948044 A CN 202210948044A CN 115117399 A CN115117399 A CN 115117399A
- Authority
- CN
- China
- Prior art keywords
- tank
- temperature
- water
- gas
- tank body
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 32
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 224
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000002347 injection Methods 0.000 claims abstract description 13
- 239000007924 injection Substances 0.000 claims abstract description 13
- 230000000630 rising effect Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 46
- 239000000498 cooling water Substances 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 135
- 238000010438 heat treatment Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
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
- H01M8/04492—Humidity; Ambient humidity; Water content
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
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 invention provides a gas humidifying device for fuel cell testing, belongs to the technical field of fuel cells, and solves the problems that in the prior art, the gas humidity is difficult to adjust rapidly according to the operation requirement of a galvanic pile, and the application range is limited. The device is suitable for all working points and comprises a gas humidifying tank, a first tank body filled with constant-temperature hot water, a second tank body filled with constant-temperature cold water, a first water pump, a second water pump and a controller. The gas humidifying tank is internally provided with a heater and a cooling plate, a water inlet is connected with the first tank body through a first water pump to form a rough adjusting temperature rising branch, and a water inlet II is connected with the second tank body through a second water pump to form a rough adjusting cooling branch. The control method comprises the following steps: determining a dew point temperature corresponding to the target humidity; acquiring the actual water temperature in the gas humidification tank at the current moment, and comparing the actual water temperature with the dew point temperature to start a corresponding coarse adjustment branch to inject water into the gas humidification tank; after the water injection is finished, the heater or the cooling plate is started to precisely adjust the water temperature, so that the air is introduced after the actual water temperature in the gas humidification tank reaches the dew point temperature.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a gas humidifying device for a fuel cell test.
Background
The fuel cell is an electrochemical power generation device, is not limited by Carnot cycle, has high energy conversion efficiency, no pollution and no noise, and becomes a new generation of ideal energy utilization mode. With the gradual maturity of fuel cell technology, the commercial application of the fuel cell has wide development prospect.
In the prior art, the structure and material of a fuel cell are generally optimized and verified by fuel cell testing equipment, specifically, the fuel cell is supplied with fuel gas, air and cooling water, the control of stack operation parameters including gas flow, temperature, humidity, pressure and the like is implemented, the real-time operation state of the stack is monitored, and data recording is completed.
Currently, in a fuel cell testing device, gases are generally humidified by a gas humidification tank, and humidity control is realized by controlling water temperature in the gas humidification tank. But the time is too long, so that the gas humidity cannot respond quickly according to the operation requirement of the galvanic pile. Some test equipment adopts dry and wet gas to mix and realizes gaseous quick humidification, but needs to increase the gas volume of dry gas with the more accurate flow control (flowmeter) of all the way in order to guarantee, has increased equipment cost to, need longer pipeline to guarantee the intensive mixing of dry and wet gas. The pipeline overlength can influence gaseous entering heap temperature and humidity, and the flow control scope of flowmeter can restrict the applicable interval of quick humidification.
Disclosure of Invention
In view of the foregoing analysis, the present invention provides a gas humidification apparatus for fuel cell testing, so as to solve the problems that it is difficult to rapidly adjust the gas humidity according to the operation requirement of the stack and the applicable range is limited in the prior art.
In one aspect, an embodiment of the present invention provides a gas humidification device for a fuel cell test, including a gas humidification tank, a first tank containing constant temperature hot water, a second tank containing constant temperature cold water, a first water pump, a second water pump, and a controller; wherein,
a heater and a cooling plate for accurately adjusting the temperature of liquid in the gas humidifying tank are arranged in the gas humidifying tank, a water inlet of the gas humidifying tank is connected with a water outlet of the first tank through a first water pump to form a rough adjusting temperature-increasing branch, and a water inlet of the gas humidifying tank is connected with a water outlet of the second tank through a second water pump to form a rough adjusting cooling branch;
the controller is used for determining the dew point temperature corresponding to the target humidity after starting; acquiring the actual water temperature in the gas humidification tank at the current moment, and starting the coarse-adjustment temperature rising branch or the coarse-adjustment temperature lowering branch to inject water into the gas humidification tank according to the comparison result of the actual water temperature and the dew point temperature; and after the water injection is finished, starting the heater or the cooling plate in the gas humidification tank to further finely adjust the water temperature, so that the actual water temperature in the gas humidification tank reaches the dew point temperature, and then ventilating the gas humidification tank.
The beneficial effects of the above technical scheme are as follows: the utility model provides a new dew point temperature quick adjustment's gas humidifying device, has increased two jar bodies, through the injection of cold water, hot water mixed mode, realizes the quick initial setting of temperature, and then realizes the quick adjustment of humidity. And then the temperature control function of the gas humidification tank is utilized to carry out fine adjustment on errors after water injection, and the implementation of the coarse adjustment and fine adjustment scheme ensures the precision of temperature control. The device is applicable to all operating points, can all realize the quick adjustment of gas humidity under arbitrary current density, arbitrary temperature, compares in the cost that increases the more accurate flow control scheme of the same kind obviously lower, and application scope is wider. And moreover, the gas pipeline of the gas humidification tank is not changed, and the test consistency in a rapid humidification mode and a non-rapid humidification mode is ensured.
Based on the further improvement of the device, the gas humidifying device also comprises a first electromagnetic valve and a second electromagnetic valve; wherein,
the first electromagnetic valve is arranged on a connecting pipeline between the gas humidification tank and the first water pump, and the control end of the first electromagnetic valve is connected with the output end of the controller;
the second electromagnetic valve is arranged on a connecting pipeline between the gas humidifying tank and the second water pump, and the control end of the second electromagnetic valve is also connected with the output end of the controller.
Furthermore, the gas humidifying device also comprises an electric control three-way valve; wherein,
the input end of the electric control three-way valve is connected with a water outlet of the gas humidifying tank, the first output end of the electric control three-way valve is connected with a water inlet of the first tank body, the second output end of the electric control three-way valve is connected with a water inlet of the second tank body, and the control end of the electric control three-way valve is connected with the output end of the controller.
Further, the controller is also used for monitoring whether the liquid level height in the gas humidification tank exceeds the limit in real time in the water injection process, if not, continuing to monitor, if so, driving the gas humidification tank to discharge water, and identifying that the water discharge temperature of the gas humidification tank is close to the water temperature in the first tank bodyT A Or the water temperature in the second tank bodyT B Then adjusting the opening of the electrically controlled three-way valve to recycle the water drained from the gas humidification tank to the matched first tank body or second tank body; and starting the temperature adjusting devices of the first tank body and the second tank body to keep the water temperature in the first tank body and the water temperature in the second tank body constant.
Further, the gas humidifying device also comprises a first heat exchanger and a first electric heater which are used as temperature adjusting equipment of the first tank body; wherein,
the first heat exchanger is respectively communicated with the liquid in the first tank body and the cathode tail exhaust body of the fuel cell stack, and the control end of the first heat exchanger is connected with the output end of the controller and is used for carrying out heat exchange on the liquid in the first tank body and the cathode tail exhaust body after starting;
the first tank body is also internally provided with a first electric heater which can heat the liquid in the tank, and the control end of the first electric heater is connected with the output end of the controller.
Further, the gas humidifying device also comprises a second heat exchanger which is used as temperature adjusting equipment of a second tank body; wherein,
the second heat exchanger is respectively communicated with the liquid in the second tank body and the equipment cooling water, and the control end of the second heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the second tank body and the equipment cooling water after starting.
Further, the gas humidifying device also comprises a third heat exchanger; the third heat exchanger, a heater and a cooling plate in the gas humidifying tank are used as temperature adjusting equipment of the gas humidifying tank; wherein,
the third heat exchanger is respectively communicated with the liquid in the gas humidifying tank and the equipment cooling water, and the control end of the third heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the gas humidifying tank and the equipment cooling water after starting.
Furthermore, the shells of the first tank body, the second tank body and the gas humidifying tank are provided with heat insulation layers and have heat insulation structures.
Further, the controller further comprises a data acquisition unit and a data processing and control unit which are connected in sequence; wherein,
the data acquisition unit further comprises:
a target humidity obtaining subunit, configured to receive a target humidity of the test gas;
the liquid level height sensor is arranged on the inner wall of the gas humidifying tank and used for acquiring the liquid level height in the gas humidifying tank;
the liquid temperature sensors are respectively arranged on the inner walls of the gas humidifying tank, the first tank body and the second tank body and are used for acquiring the actual water temperature in the gas humidifying tank, the water temperature in the first tank body and the water temperature in the second tank body;
and the flow sensor is arranged on the inner wall of the output end pipeline of the water pump and used for acquiring the water inlet flow corresponding to the current rotating speed of the water pump.
Further, the data processing and control unit executes the following program:
s1, determining a dew point temperature corresponding to a target humidityT 1 ；
S2, acquiring the actual water temperature in the gas humidification tank at the current moment through a liquid temperature sensor in the gas humidification tankT 0 ；
S3, mixing the actual water temperatureT 0 And dew point temperatureT 1 Comparing, if the actual temperature isT 0 Below dew point temperatureT 1 Step S4 is executed if the actual temperature is not equal to the predetermined temperatureT 0 Above dew point temperatureT 1 Step S5 is executed;
s4, starting a first water pump and starting a first electromagnetic valve to start a coarse-tuning heating branch to inject water into the gas humidification tank until coarse tuning is completed, closing the first water pump and the first electromagnetic valve, and executing the step S6; wherein, the opening time of the first electromagnetic valve in the coarse adjustment processt 1 Satisfy the requirement of
t 1 =[(T 1 -T 0 ）L 2 /(T A -T 0 )]/L 0
In the formula,L 2 the unit of the water quantity in the gas humidifying tank is L, which is obtained according to data acquired by the liquid level height sensor;L 0 the unit of the inflow water flow corresponding to the rotating speed of the water pump collected by the flow sensor is L.s -1 ；T A The water temperature in the first tank body is measured in units of temperature;
s5, starting a second water pump and starting a second electromagnetic valve to start a rough-adjusting cooling branch to inject water into the gas humidification tank until rough adjustment is completed, closing the second water pump and the second electromagnetic valve, and executing the step S6; wherein the opening time of the second electromagnetic valvet 2 Satisfy the requirements of
t 2 =[(T 0 -T 1 ）L 2 /(T 0 -T B )]/L 0
In the formula,T B the water temperature in the first tank body is measured in units of temperature;
s6, obtaining the actual water temperature in the gas humidifying tank again, comparing the actual water temperature with the dew point temperature again, starting a heater in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is still lower than the dew point temperature, and starting a cooling plate in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is higher than the dew point temperature, so that the actual water temperature in the gas humidifying tank reaches the dew point temperature corresponding to the target humidity;
s7, introducing the gas to be detected into the gas humidifying tank.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. through the waste heat of retrieving the tail row, maintain the temperature of first jar of body, reduced the energy consumption to water heating.
2. The water outlet at the bottom of the gas humidifying tank is additionally provided with a temperature sensor, the water discharging pipeline is additionally provided with a three-way valve which is respectively connected with the first tank body and the second tank body, the water for the gas humidifying tank is recycled, and the test cost is saved.
3. The device has no flow range limitation, and can realize the rapid humidification of the fuel cell stack under the full-power section parameter.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the disclosure, nor is it intended to be used to limit the scope of the disclosure.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
FIG. 1 is a schematic diagram showing the composition of a gas humidifying device according to embodiment 1;
fig. 2 shows a schematic connection diagram of the gas humidifying device of embodiment 2.
Reference numerals:
1-a gas humidifying tank; 2-a first tank; 3-a second tank; 4-a first water pump; 5-a first battery valve; 6-a second water pump; 7-a second solenoid valve; 8-an electrically controlled three-way valve; 9-fuel cell stack.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by 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.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.
Example 1
One embodiment of the invention discloses a gas humidifying device for a fuel cell test, which comprises a gas humidifying tank, a first tank body filled with constant-temperature hot water (the specific temperature can be set according to the test requirement and is generally 0-30 ℃), a second tank body filled with constant-temperature cold water (the specific temperature can be set according to the test requirement and is generally 50-90 ℃), a first water pump, a second water pump and a controller, as shown in fig. 1.
The gas humidifying tank is internally provided with a heater and a cooling plate for accurately adjusting the temperature of liquid in the tank, a water inlet of the gas humidifying tank is connected with a water outlet of the first tank through a first water pump to form a rough adjusting temperature-increasing branch, and a water inlet of the gas humidifying tank is connected with a water outlet of the second tank through a second water pump to form a rough adjusting cooling branch. The gas inlet of the gas humidifying tank is used for introducing gas to be measured, such as air or hydrogen.
The controller is used for determining the dew point temperature corresponding to the target humidity after starting; acquiring the actual water temperature in the gas humidification tank at the current moment, and starting the coarse-adjustment temperature rising branch or the coarse-adjustment temperature lowering branch to inject water into the gas humidification tank according to the comparison result of the actual water temperature and the dew point temperature; and after the water injection is finished, starting the heater or the cooling plate in the gas humidification tank to further finely adjust the water temperature, so that the actual water temperature in the gas humidification tank reaches the dew point temperature, and then ventilating the gas humidification tank.
Methods for determining the dew point temperature from the target humidity are known in the art, see for example patents CN202010632207.6, CN202111321746.9, etc. As will be appreciated by those skilled in the art.
When the actual water temperature is lower than the dew point temperature, the water temperature needs to be heated, the rough adjusting temperature rising branch is started to roughly adjust the water temperature of the hot water injected into the gas humidification tank, and then the heater or the cooling plate in the gas humidification tank is started to further finely adjust the water temperature. When the actual water temperature is higher than the dew point temperature, the water temperature needs to be reduced, the rough adjusting and cooling branch is started to perform rough adjustment on the water temperature of the cooling water in the gas humidification tank, and then the heater or the cooling plate in the gas humidification tank is started to further fine adjust the water temperature.
Compared with the prior art, this embodiment provides a new dew point temperature quick adjustment's gas humidifying device, has increased two jar bodies, through the pouring into of cold water, hot water mixed mode, realizes the quick initial setting of temperature, and then realizes the quick adjustment of humidity. And then the temperature control function of the gas humidification tank is utilized to perform fine adjustment of errors after water injection, and the implementation of a coarse adjustment and fine adjustment scheme ensures the precision of temperature control. The device is applicable to all operating points, can all realize the quick adjustment of gas humidity under arbitrary current density, arbitrary temperature, compares in the cost that increases the more accurate flow control scheme of the same kind obviously lower, and application scope is wider. And moreover, the gas pipeline of the gas humidifying tank is not changed, so that the testing consistency in a rapid humidifying mode and a non-rapid humidifying mode is ensured.
Example 2
The improvement is carried out on the basis of embodiment 1, and all pipeline interfaces are provided with sealing pieces to prevent leakage of gas and liquid.
Preferably, the second heat exchanger is a plate heat exchanger. The heat exchanger has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, convenience in installation and cleaning, wide application, long service life and the like. Under the condition of the same pressure loss, the heat transfer coefficient of the heat exchanger is 3-5 times higher than that of a tubular heat exchanger, the occupied area of the heat exchanger is one third of that of the tubular heat exchanger, and the heat recovery rate can reach more than 90%.
Preferably, the gas humidifying device further comprises a first electromagnetic valve and a second electromagnetic valve. The first electromagnetic valve is arranged on a connecting pipeline between the gas humidification tank and the first water pump, and the control end of the first electromagnetic valve is connected with the output end of the controller; the second electromagnetic valve is arranged on a connecting pipeline between the gas humidifying tank and the second water pump, and the control end of the second electromagnetic valve is also connected with the output end of the controller.
Preferably, the gas humidifying device further comprises an electrically controlled three-way valve. The input end of the electric control three-way valve is connected with a water outlet of the gas humidifying tank, the first output end of the electric control three-way valve is connected with a water inlet of the first tank body, the second output end of the electric control three-way valve is connected with a water inlet of the second tank body, and the control end of the electric control three-way valve is connected with the output end of the controller.
Preferably, the controller is further used for monitoring whether the liquid level height in the gas humidification tank exceeds the limit in real time in the water injection process, if not, continuing to monitor, if so, driving the gas humidification tank to drain water, and recognizing that the drain water temperature of the gas humidification tank is close to the water temperature in the first tank bodyT A Or the water temperature in the second tank bodyT B Further adjusting the opening of the electric control three-way valve to recycle the water drained from the gas humidification tank to the matched first tank body or second tank body; and starting the temperature adjusting devices of the first tank body and the second tank body to keep the water temperature in the first tank body and the water temperature in the second tank body constant.
Preferably, the gas humidifying device further comprises a first heat exchanger, a first electric heater and a temperature adjusting device as the first tank body.
The first heat exchanger is communicated with the liquid in the first tank body and the cathode tail exhaust body of the fuel cell stack respectively, and the control end of the first heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the first tank body and the cathode tail exhaust body after starting.
The first tank body is also internally provided with a first electric heater which can heat the liquid in the tank, and the control end of the heater is connected with the output end of the controller.
Preferably, the gas humidifying device further comprises a second heat exchanger as a temperature adjusting device of the second tank.
The second heat exchanger is communicated with the liquid in the second tank body and the equipment cooling water respectively, and the control end of the second heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the second tank body and the equipment cooling water after starting.
Preferably, the gas humidification apparatus further comprises a third heat exchanger. The third heat exchanger, the heater and the cooling plate in the gas humidifying tank are used as temperature regulating equipment of the gas humidifying tank.
The third heat exchanger is respectively communicated with the liquid in the gas humidifying tank and the equipment cooling water, and the control end of the third heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the gas humidifying tank and the equipment cooling water after being started.
Preferably, the shells of the first tank body, the second tank body and the gas humidifying tank are provided with heat insulation layers and have heat insulation structures.
Preferably, the controller further comprises a data acquisition unit and a data processing and control unit which are connected in sequence.
The data acquisition unit further comprises a target humidity acquisition subunit, a liquid level height sensor, a liquid temperature sensor and a flow sensor.
And the target humidity acquiring subunit is used for receiving the target humidity of the test gas.
And the liquid level height sensor is arranged on the inner wall of the gas humidification tank and used for acquiring the liquid level height in the gas humidification tank.
And the liquid temperature sensors are respectively arranged on the inner walls of the gas humidifying tank, the first tank body and the second tank body and are used for acquiring the actual water temperature in the gas humidifying tank, the water temperature in the first tank body and the water temperature in the second tank body.
And the flow sensor is arranged on the inner wall of the output end pipeline of the water pump and used for acquiring the water inlet flow corresponding to the current rotating speed of the water pump.
Preferably, the data processing and control unit executes the following program:
s1, determining a dew point temperature corresponding to a target humidityT 1 ；
S2, acquiring the actual water temperature in the gas humidification tank at the current moment through a liquid temperature sensor in the gas humidification tankT 0 ；
S3, mixing the actual water temperatureT 0 And dew point temperatureT 1 Comparing, if the actual temperature isT 0 Below dew point temperatureT 1 Step S4 is executed if the actual temperature is not equal to the predetermined temperatureT 0 Above dew point temperatureT 1 Step S5 is executed;
s4, starting a first water pump and opening a first electromagnetic valve to start a coarse-adjustment heating branch to inject water into the gas humidification tank until coarse adjustment is completed, and closing first waterA pump, a first solenoid valve, and executing step S6; wherein, the opening time of the first electromagnetic valve in the coarse adjustment processt 1 Satisfy the requirement of
t 1 =[(T 1 -T 0 ）L 2 /(T A -T 0 )]/L 0
In the formula,L 2 the unit of the water quantity in the gas humidifying tank is L, which is obtained according to data acquired by the liquid level height sensor;L 0 the unit of the inflow water flow corresponding to the rotating speed of the water pump collected by the flow sensor is L.s -1 ；T A The water temperature in the first tank body is measured in units of temperature;
s5, starting a second water pump and starting a second electromagnetic valve to start a rough-adjusting cooling branch to inject water into the gas humidification tank until rough adjustment is completed, closing the second water pump and the second electromagnetic valve, and executing the step S6; wherein the opening time of the second electromagnetic valvet 2 Satisfy the requirement of
t 2 =[(T 0 -T 1 ）L 2 /(T 0 -T B )]/L 0
In the formula,T B the water temperature in the first tank body is measured in units of temperature;
s6, obtaining the actual water temperature in the gas humidifying tank again, comparing the actual water temperature with the dew point temperature again, starting a heater in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is still lower than the dew point temperature, and starting a cooling plate in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is higher than the dew point temperature, so that the actual water temperature in the gas humidifying tank reaches the dew point temperature corresponding to the target humidity;
s7, introducing the gas to be detected into the gas humidifying tank.
During the implementation, the first jar of internal portion is furnished with the heater, in addition through carrying out the heat exchange with the negative pole tail row, maintains temperature 70 ℃, and the temperature can be set for, change according to user's demand, uses 70 ℃ as the example in this scheme. The second tank exchanges heat with equipment cooling water through plate exchange, and the water temperature is maintained at 20 ℃.
The first tank body and the second tank body are respectively connected with the gas humidifying tank.
A temperature sensor is added to a water outlet at the bottom of the gas humidification tank, and a three-way valve is added to a water discharge pipeline and is respectively connected with the first tank body and the second tank body.
The control method comprises the following steps: starting a corresponding electromagnetic valve and a water pump with constant rotating speed, injecting water into the gas humidification tank to roughly adjust the water temperature, and after the water injection is finished, finely adjusting the water temperature in the gas humidification tank through a heater or a cooling plate in the gas humidification tank to realize the rapid control of the rising or the lowering of the water temperature. The water injection process may cause the liquid level in the gas humidification tank to exceed the limit, so that the gas humidification tank automatically drains water, the actual water inlet amount cannot adjust the water temperature in the gas humidification tank to the target temperature value, and the temperature adjustment equipment of the gas humidification tank is needed to further control the temperature after water injection, so that the water temperature can quickly reach the target value. And according to the drainage temperature, if the drainage temperature is closer to 70 ℃, collecting the drained water to the first tank body through the control of a three-way valve, and if the water temperature is closer to 20 ℃, collecting the drained water to the second tank body. After collecting the drained water, the first tank and the second tank keep the water temperature and prepare for the next temperature adjustment.
Compared with embodiment 1, the gas humidifying device provided by the present embodiment has the following beneficial effects:
1. through the waste heat of retrieving the tail row, maintain the temperature of first jar of body, reduced the energy consumption to water heating.
2. The water outlet at the bottom of the gas humidifying tank is additionally provided with a temperature sensor, the water discharging pipeline is additionally provided with a three-way valve which is respectively connected with the first tank body and the second tank body, the water for the gas humidifying tank is recycled, and the test cost is saved.
3. The device has no flow range limitation, and can realize the rapid humidification of the fuel cell stack under the full-power section parameter.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, the practical application, or improvements made to the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (10)
1. A gas humidifying device for testing a fuel cell is characterized by comprising a gas humidifying tank, a first tank body filled with constant-temperature hot water, a second tank body filled with constant-temperature cold water, a first water pump, a second water pump and a controller; wherein,
a heater and a cooling plate for accurately adjusting the temperature of liquid in the gas humidifying tank are arranged in the gas humidifying tank, a water inlet of the gas humidifying tank is connected with a water outlet of the first tank through a first water pump to form a rough adjusting temperature-increasing branch, and a water inlet of the gas humidifying tank is connected with a water outlet of the second tank through a second water pump to form a rough adjusting cooling branch;
the controller is used for determining the dew point temperature corresponding to the target humidity after starting; acquiring the actual water temperature in the gas humidification tank at the current moment, and starting the coarse-adjustment temperature rising branch or the coarse-adjustment temperature lowering branch to inject water into the gas humidification tank according to the comparison result of the actual water temperature and the dew point temperature; and after the water injection is finished, starting the heater or the cooling plate in the gas humidification tank to further finely adjust the water temperature, so that the actual water temperature in the gas humidification tank reaches the dew point temperature, and then ventilating the gas humidification tank.
2. The gas humidification device for fuel cell testing of claim 1, further comprising a first solenoid valve, a second solenoid valve; wherein,
the first electromagnetic valve is arranged on a connecting pipeline between the gas humidification tank and the first water pump, and the control end of the first electromagnetic valve is connected with the output end of the controller;
the second electromagnetic valve is arranged on a connecting pipeline between the gas humidifying tank and the second water pump, and the control end of the second electromagnetic valve is also connected with the output end of the controller.
3. The gas humidification device for fuel cell testing of claim 1 or 2, further comprising an electrically controlled three-way valve; wherein,
the input end of the electric control three-way valve is connected with a water outlet of the gas humidifying tank, the first output end of the electric control three-way valve is connected with a water inlet of the first tank body, the second output end of the electric control three-way valve is connected with a water inlet of the second tank body, and the control end of the electric control three-way valve is connected with the output end of the controller.
4. The humidification apparatus for testing a fuel cell of claim 3, wherein the controller is further configured to monitor in real time during the water injection whether the liquid level in the humidification tank exceeds a limit, and if not, to continue monitoring, and if so, to drive the humidification tank to drain water, and to identify that the temperature of the water drained from the humidification tank is close to the temperature of the water in the first tankT A Or the water temperature in the second tank bodyT B Further adjusting the opening of the electric control three-way valve to recycle the water drained from the gas humidification tank to the matched first tank body or second tank body; and starting the temperature adjusting devices of the first tank body and the second tank body to keep the water temperature in the first tank body and the water temperature in the second tank body constant.
5. The gas humidification device for fuel cell testing of claim 4, further comprising a first heat exchanger, a first electric heater as a temperature regulation device of the first tank; wherein,
the first heat exchanger is respectively communicated with the liquid in the first tank body and the cathode tail exhaust body of the fuel cell stack, and the control end of the first heat exchanger is connected with the output end of the controller and is used for carrying out heat exchange on the liquid in the first tank body and the cathode tail exhaust body after starting;
the first tank body is also internally provided with a first electric heater which can heat the liquid in the tank, and the control end of the first electric heater is connected with the output end of the controller.
6. The gas humidification apparatus for a fuel cell test as claimed in claim 4 or 5, further comprising a second heat exchanger as a temperature adjustment device of the second tank; wherein,
the second heat exchanger is respectively communicated with the liquid in the second tank body and the equipment cooling water, and the control end of the second heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the second tank body and the equipment cooling water after starting.
7. The gas humidification device for fuel cell testing of any one of claims 1, 2, 4 and 5, further comprising a third heat exchanger; the third heat exchanger, a heater and a cooling plate in the gas humidifying tank are used as temperature adjusting equipment of the gas humidifying tank; wherein,
the third heat exchanger is respectively communicated with the liquid in the gas humidifying tank and the equipment cooling water, and the control end of the third heat exchanger is connected with the output end of the controller and used for carrying out heat exchange on the liquid in the gas humidifying tank and the equipment cooling water after starting.
8. The gas humidification device for fuel cell testing of claim 7, wherein the first tank, the second tank and the housing of the gas humidification tank are all provided with thermal insulation layers and have thermal insulation structures.
9. The gas humidifying device for the fuel cell test according to any one of claims 1, 2, 4, 5 and 8, wherein the controller further comprises a data acquisition unit, a data processing and control unit which are connected in sequence; wherein,
the data acquisition unit further comprises:
a target humidity acquiring subunit, configured to receive a target humidity of the test gas;
the liquid level height sensor is arranged on the inner wall of the gas humidifying tank and used for acquiring the liquid level height in the gas humidifying tank;
the liquid temperature sensors are respectively arranged on the inner walls of the gas humidifying tank, the first tank body and the second tank body and are used for acquiring the actual water temperature in the gas humidifying tank, the water temperature in the first tank body and the water temperature in the second tank body;
and the flow sensor is arranged on the inner wall of the pipeline at the output end of the water pump and used for acquiring the water inlet flow corresponding to the current rotating speed of the water pump.
10. The gas humidification device for fuel cell test as set forth in claim 9, wherein the data processing and control unit executes the following program:
s1, determining a dew point temperature corresponding to a target humidityT 1 ；
S2, acquiring the actual water temperature in the gas humidification tank at the current moment through a liquid temperature sensor in the gas humidification tankT 0 ；
S3, mixing the actual water temperatureT 0 And dew point temperatureT 1 Comparing, if the actual temperature isT 0 Below dew point temperatureT 1 Step S4 is executed if the actual temperature is not equal to the predetermined temperatureT 0 Above dew point temperatureT 1 Step S5 is executed;
s4, starting a first water pump and starting a first electromagnetic valve to start a rough-adjusting temperature-rising branch to inject water into the gas humidification tank until rough adjustment is completed, closing the first water pump and the first electromagnetic valve, and executing the step S6; wherein, the opening time of the first electromagnetic valve in the course of coarse adjustmentt 1 Satisfy the requirement of
t 1 =[(T 1 -T 0 ）L 2 /(T A -T 0 )]/L 0
In the formula,L 2 the unit of the water quantity in the gas humidifying tank is L, which is obtained according to data acquired by the liquid level height sensor;L 0 the unit of the inflow water flow corresponding to the rotating speed of the water pump collected by the flow sensor is L.s -1 ；T A The water temperature in the first tank body is measured in units of temperature;
s5, starting a second water pump and opening a second electromagnetic valve to start a coarse-tuning cooling branch to inject water into the gas humidification tank until coarse tuning is completed, closing the second water pump and the second electromagnetic valve, and executing the step S6; wherein the opening time of the second electromagnetic valvet 2 Satisfy the requirement of
t 2 =[(T 0 -T 1 ）L 2 /(T 0 -T B )]/L 0
In the formula,T B the water temperature in the first tank body is measured in units of temperature;
s6, obtaining the actual water temperature in the gas humidifying tank again, comparing the actual water temperature with the dew point temperature again, starting a heater in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is still lower than the dew point temperature, and starting a cooling plate in the gas humidifying tank to further finely adjust the water temperature if the actual water temperature is higher than the dew point temperature, so that the actual water temperature in the gas humidifying tank reaches the dew point temperature corresponding to the target humidity;
s7, introducing the gas to be detected into the gas humidifying tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948044.1A CN115117399A (en) | 2022-08-09 | 2022-08-09 | Gas humidifying device for fuel cell test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948044.1A CN115117399A (en) | 2022-08-09 | 2022-08-09 | Gas humidifying device for fuel cell test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115117399A true CN115117399A (en) | 2022-09-27 |
Family
ID=83336091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210948044.1A Pending CN115117399A (en) | 2022-08-09 | 2022-08-09 | Gas humidifying device for fuel cell test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115117399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116706158A (en) * | 2023-06-28 | 2023-09-05 | 北京亿华通科技股份有限公司 | Air side air inlet temperature and humidity combined control device of fuel cell |
-
2022
- 2022-08-09 CN CN202210948044.1A patent/CN115117399A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116706158A (en) * | 2023-06-28 | 2023-09-05 | 北京亿华通科技股份有限公司 | Air side air inlet temperature and humidity combined control device of fuel cell |
| CN116706158B (en) * | 2023-06-28 | 2023-12-22 | 北京亿华通科技股份有限公司 | Air side air inlet temperature and humidity combined control device of fuel cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102522582B (en) | Shutdown purging system and purging method for vehicle-mounted fuel cell power generation system | |
| CN109713334A (en) | Fuel cell pile testboard and its application method | |
| CN209675411U (en) | Fuel cell pile testboard | |
| CN113488684A (en) | Humidity regulation and control device and method for fuel cell | |
| CN209486263U (en) | Fuel battery test platform frame | |
| CN113839064B (en) | Vehicle-mounted fuel cell device and control method thereof | |
| CN114068997B (en) | High-efficiency energy-saving fuel cell stack test system | |
| CN107591548B (en) | Fuel cell humidifier test platform | |
| CN103050723A (en) | Cathode exhaust recirculating system for proton exchange membrane fuel cell | |
| CN105161741A (en) | Blowing system and blowing method for fuel cell | |
| CN113964344A (en) | Air inlet temperature control device of fuel cell and control method thereof | |
| CN203326037U (en) | Cathode exhaust gas recirculation system used for proton exchange membrane fuel cell (PEMFC) | |
| CN115117399A (en) | Gas humidifying device for fuel cell test | |
| CN113517457A (en) | Gas heating and humidifying system of fuel cell detection platform | |
| CN115020759B (en) | Anode water management control system and method for fuel cell | |
| CN112768725A (en) | Fuel cell unmanned aerial vehicle and temperature control method and device for hydrogen power equipment | |
| CN111916792A (en) | Single-working-condition multi-sample fuel cell stack testing system and control method thereof | |
| CN117096397A (en) | Fuel cell system with self-regulating and controlling function of in-pile air temperature | |
| CN215988867U (en) | Gas heating and humidifying system of fuel cell detection platform | |
| CN106229530B (en) | The Proton Exchange Membrane Fuel Cells row's hydrogen system that can quickly open at low temperature | |
| CN116907896A (en) | Performance test method and device for membrane humidifier | |
| CN115832358A (en) | Cathode closed air cooling type fuel cell test system | |
| CN116111136A (en) | High-temperature proton exchange membrane fuel cell test bench with fluid high-low temperature conversion module | |
| CN216488175U (en) | Simulator of fuel cell stack | |
| CN220367947U (en) | Off-line pre-humidifying device for fuel cell |
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 |