CN114659798A - Hydrogen consumption measuring device for hydrogen fuel cell automobile - Google Patents
Hydrogen consumption measuring device for hydrogen fuel cell automobile Download PDFInfo
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- CN114659798A CN114659798A CN202011549417.5A CN202011549417A CN114659798A CN 114659798 A CN114659798 A CN 114659798A CN 202011549417 A CN202011549417 A CN 202011549417A CN 114659798 A CN114659798 A CN 114659798A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 144
- 239000001257 hydrogen Substances 0.000 title claims abstract description 142
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 142
- 239000000446 fuel Substances 0.000 title claims abstract description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000010926 purge Methods 0.000 claims abstract description 30
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 18
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims description 35
- 238000000034 method Methods 0.000 description 20
- 238000012360 testing method Methods 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- 238000005259 measurement Methods 0.000 description 12
- 230000001276 controlling effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 150000002431 hydrogen Chemical class 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F22/00—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
- G01F22/02—Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for involving measurement of pressure
Abstract
The invention discloses a hydrogen consumption measuring device for a hydrogen fuel cell automobile, which relates to the technical field of fuel cell automobiles and comprises a main pipeline, a hydrogen inlet pipeline, a nitrogen inlet pipeline, a first emptying pipeline, a second emptying pipeline and a bypass pipeline, control pipeline system and controller, hydrogen lets in the pipeline and nitrogen gas lets in the pipeline and all is connected with same one end of main line, hydrogen lets in and has set gradually entry shutoff valve and first check valve on the pipeline, first evacuation pipeline has set gradually on the main line, wide range flowmeter, small-scale flowmeter, the zero valve, second evacuation pipeline and export shutoff valve, first evacuation valve and second check valve have set gradually on the first evacuation pipeline, second evacuation valve and third check valve have set gradually on the second evacuation pipeline, nitrogen gas lets in and is provided with purge valve and fourth check valve on the pipeline, the bypass valve connects in parallel in small-scale flowmeter one side. The device can be applicable to different working conditions of vehicle, has improved the measuring accuracy.
Description
Technical Field
The invention relates to the technical field of fuel cell automobiles, in particular to a hydrogen consumption measuring device for a hydrogen fuel cell automobile.
Background
The hydrogen fuel cell automobile uses hydrogen as energy, generates electric energy through the chemical reaction of the hydrogen and oxygen, and drives a motor to run so as to drive the automobile to run. Similar to the oil consumption of fuel vehicles, the hydrogen consumption of hydrogen fuel cell vehicles is a main index for evaluating the hydrogen consumption economy of vehicles, and the measurement of the hydrogen consumption is the first problem to be solved in the research of hydrogen fuel cell vehicles.
According to the GB/T35178-2017 fuel cell electric vehicle hydrogen consumption measuring method, the following three test methods are mainly used for measuring/calculating the actual consumption of the outdoor hydrogen supply in a laboratory by requiring that external hydrogen supply is used and a vehicle-mounted fuel supply pipeline is cut off in the test process: pressure-temperature method: the method for calculating the hydrogen consumption by measuring the gas pressure and temperature in the high-pressure hydrogen storage tank before and after the test uses a hydrogen storage tank with known internal volume and capable of detecting temperature and pressure (the temperature accuracy is +/-1K, and the pressure accuracy is +/-1%); mass analysis method: a method for calculating the hydrogen consumption by measuring the mass of the high-pressure hydrogen storage tank before and after the test, wherein the hydrogen storage tank for the test is suitable for measuring the mass (the accuracy is +/-0.5 g); flow method: method for measuring the volume or mass of hydrogen consumed by a vehicle (accuracy ± 1%) by means of a flow meter installed on the hydrogen supply line from an off-board fuel supply source to the vehicle.
The temperature pressure method has large real-time test data error due to unbalance of internal temperature and limitation of sensor arrangement in the test process. The mass analysis method has large equipment investment, can not record test process data in real time, can not analyze according to the real-time data, and can not provide feasible improvement measures according to the test real-time data. The flow method adopts a high-precision flowmeter, the error of a test numerical value is small, and the data of the test process can be recorded in real time, so that the mass method is recommended to test the hydrogen consumption.
In the conventional hydrogen consumption amount measuring apparatus, the hydrogen flow amount measuring section employs a single flow meter. When the measuring device works, no matter the hydrogen flow is large, the hydrogen flow is measured by using a single flowmeter. The hydrogen fuel cell electric vehicle has wide flow range of hydrogen actual consumption, and the current hydrogen consumption measuring device adopts a single mass flow meter. Each flow meter has an optimal measurement range within which the measurement error can settle to within 1% of the standard requirement, while measurements beyond the meter range can have large errors. Therefore, the flow of hydrogen cannot be accurately measured under different working conditions of the vehicle.
Disclosure of Invention
In order to solve the technical problems, the invention provides a hydrogen consumption measuring device for a hydrogen fuel cell automobile, which can be suitable for different working conditions of the automobile and improves the testing precision.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a hydrogen consumption measuring device of a hydrogen fuel cell automobile, which comprises a main pipeline, a hydrogen inlet pipeline, a nitrogen inlet pipeline, a first emptying pipeline, a second emptying pipeline, a bypass pipeline, a control pipeline system and a controller, wherein the hydrogen inlet pipeline and the nitrogen inlet pipeline are connected with the same end of the main pipeline, an inlet shutoff valve and a first one-way valve are sequentially arranged on the hydrogen inlet pipeline, the first emptying pipeline, a wide-range flow meter, a small-range flow meter, a zero-setting valve, the second emptying pipeline and an outlet shutoff valve are sequentially arranged on the main pipeline, two ends of the first emptying pipeline are respectively communicated with the main pipeline and the outside, a first emptying valve and a second one-way valve are sequentially arranged on the first emptying pipeline, two ends of the second emptying pipeline are respectively communicated with the main pipeline and the outside, the second emptying pipe is sequentially provided with a second emptying valve and a third one-way valve, the nitrogen gas inlet pipe is provided with a purging valve and a fourth one-way valve, two ends of the bypass pipe are connected with the main pipe, the bypass pipe is provided with a bypass valve, the bypass valve is connected to one side of the small-range flow meter in parallel, the inlet shutoff valve, the purging valve, the first emptying valve, the bypass valve, the zero-setting valve, the second emptying valve and the outlet shutoff valve are connected with the control pipe system, and the control pipe system, the large-range flow meter and the small-range flow meter are connected with the controller.
Preferably, an inlet pressure regulating valve is arranged on the main pipeline, the inlet pressure regulating valve is arranged between the hydrogen introducing pipeline and the first emptying pipeline, and the inlet pressure regulating valve is connected with the controller.
Preferably, an outlet pressure regulating valve is arranged on the main pipeline, the outlet pressure regulating valve is arranged between the zero valve and the second evacuation pipeline, and the outlet pressure regulating valve is connected with the controller.
Preferably, a first pressure sensor, a second pressure sensor and a third pressure sensor are arranged on the main pipeline, the first pressure sensor is arranged between the first evacuation pipeline and the wide-range flow meter, the second pressure sensor is arranged between the small-range flow meter and the zero setting valve, the third pressure sensor is arranged on one side, away from the second evacuation pipeline, of the outlet shutoff valve, and the first pressure sensor, the second pressure sensor and the third pressure sensor are all connected with the controller.
Preferably, the exhaust valve further comprises a safety pipeline, a safety valve is arranged on the safety pipeline, two ends of the safety pipeline are respectively connected with the main pipeline and the first exhaust pipeline, one end of the safety pipeline connected with the main pipeline is arranged between the first exhaust pipeline and the first pressure sensor, and one end of the safety pipeline connected with the first exhaust pipeline is arranged on one side, away from the first exhaust valve, of the second one-way valve.
Preferably, the control pipeline system comprises a compressed air inlet pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, a fourth branch pipeline, a fifth branch pipeline, a sixth branch pipeline and a seventh branch pipeline; two ends of the first branch pipeline are respectively connected with the compressed air inlet pipeline and the inlet shutoff valve, and a first electromagnetic valve is arranged on the first branch pipeline; two ends of the second branch pipeline are respectively connected with the compressed air inlet pipeline and the purge valve, and a second electromagnetic valve is arranged on the second branch pipeline; two ends of the third branch pipeline are respectively connected with the compressed air inlet pipeline and the first emptying valve, and a third electromagnetic valve is arranged on the third branch pipeline; two ends of the fourth branch pipeline are respectively connected with the compressed air inlet pipeline and the bypass valve, and a fourth electromagnetic valve is arranged on the fourth branch pipeline; two ends of the fifth branch pipeline are respectively connected with the compressed air inlet pipeline and the zero setting valve, and a fifth electromagnetic valve is arranged on the fifth branch pipeline; two ends of the sixth branch pipeline are respectively connected with the compressed air inlet pipeline and the second emptying valve, and a sixth electromagnetic valve is arranged on the sixth branch pipeline; two ends of the seventh branch pipeline are respectively connected with the compressed air inlet pipeline and the outlet shutoff valve, and a seventh electromagnetic valve is arranged on the seventh branch pipeline; the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve and the seventh solenoid valve are all connected with the controller.
Preferably, a compressed air pressure regulating valve and a fourth pressure sensor are sequentially arranged on the compressed air inlet pipeline, and both the compressed air pressure regulating valve and the fourth pressure sensor are connected with the controller.
Preferably, the range of the wide-range flowmeter is 1.0-8.0kg/h, and the range of the small-range flowmeter is 0-1.2 kg/h.
Compared with the prior art, the invention has the following technical effects:
the hydrogen consumption measuring device for the hydrogen fuel cell automobile comprises a main pipeline, a hydrogen introducing pipeline, a nitrogen introducing pipeline, a first emptying pipeline, a second emptying pipeline, a bypass pipeline, a control pipeline system and a controller, wherein a large-range flowmeter and a small-range flowmeter are arranged on the main pipeline, and a bypass valve is connected to one side of the small-range flowmeter in parallel. Before measuring the hydrogen consumption. Firstly, nitrogen replacement and hydrogen replacement are required to be carried out on the measuring device, the condition for measuring the hydrogen consumption is met after the gas replacement is finished, and furthermore, in order to ensure that the measurement of the flow meter is accurate, zero setting needs to be carried out on the flow meter before the hydrogen consumption is measured. The mass flowmeters with two different measuring ranges are adopted, when the hydrogen flow changes, the flowmeter in the corresponding measuring range is selected according to the flow, the hydrogen flow can be accurately measured, and the mass flowmeters can be suitable for different working conditions of vehicles.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention;
FIG. 2 is an error diagram of a large-scale flow meter in the hydrogen consumption measuring device of the hydrogen fuel cell vehicle provided by the invention;
FIG. 3 is an error diagram of a small-scale flow meter in the hydrogen consumption measuring device of the hydrogen fuel cell vehicle provided by the invention;
FIG. 4 is a schematic diagram of purging nitrogen gas filling performed by the hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention;
FIG. 5 is a schematic diagram of a hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention after a purge valve is closed;
FIG. 6 is a schematic diagram of a hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention for purging nitrogen;
FIG. 7 is a schematic diagram of hydrogen charging by the hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention;
FIG. 8 is a schematic diagram of a hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention after an inlet shutoff valve is closed;
fig. 9 is a schematic diagram of hydrogen evacuation performed by the hydrogen consumption measuring device for a hydrogen fuel cell vehicle according to the present invention.
Description of reference numerals: 100. hydrogen consumption measuring device of hydrogen fuel cell vehicle; 1. an inlet shutoff valve; 2. a first check valve; 3. an inlet pressure regulating valve; 4. a first purge valve; 5. a second check valve; 6. a safety valve; 7. a first pressure sensor; 8. a wide range flow meter; 9. a bypass valve; 10. a small-range flow meter; 11. a second pressure sensor; 12. a zero valve; 13. an outlet pressure regulating valve; 14. a third check valve; 15. a second purge valve; 16. an outlet shutoff valve; 17. a third pressure sensor; 18. a first solenoid valve; 19. a second solenoid valve; 20. a third electromagnetic valve; 21. a fourth solenoid valve; 22. a fifth solenoid valve; 23. a sixth electromagnetic valve; 24. a seventh electromagnetic valve; 25. a fourth pressure sensor; 26. a compressed air pressure regulating valve; 27. a purge valve; 28. a fourth check valve; 29. introducing hydrogen into a pipeline; 30. introducing nitrogen into a pipeline; 31. a main pipeline; 32. a first evacuation line; 33. a second evacuation line; 34. a bypass line; 35. a safety line; 36. compressed air is introduced into the pipeline; 37. a first branch line; 38. a second branch pipe; 39. a third branch pipe; 40. a fourth branch pipeline; 41. a fifth branch pipe; 42. a sixth branch pipeline; 43. and a seventh branch pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a hydrogen consumption measuring device for a hydrogen fuel cell automobile, which can be suitable for different working conditions of the automobile and improves the testing precision.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the present embodiment provides a hydrogen consumption measuring apparatus 100 for a hydrogen fuel cell vehicle, including a main pipeline 31, a hydrogen inlet pipeline 29, a nitrogen inlet pipeline 30, a first evacuation pipeline 32, a second evacuation pipeline 33, a bypass pipeline 34, a control pipeline system and a controller, where the hydrogen inlet pipeline 29 and the nitrogen inlet pipeline 30 are both connected to the same end of the main pipeline 31, an inlet shutoff valve 1 and a first one-way valve 2 are sequentially disposed on the hydrogen inlet pipeline 29, the inlet shutoff valve 1 is used to control whether hydrogen enters the measuring apparatus, and is in a normally closed state, that is, the inlet shutoff valve is kept in a closed state when hydrogen is not introduced, and is opened when hydrogen is used, the first one-way valve 2 is used to ensure that hydrogen entering the measuring apparatus pipeline flows unidirectionally, and no backflow occurs. The main pipeline 31 is sequentially provided with a first emptying pipeline 32, a large-range flow meter 8, a small-range flow meter 10, a zero setting valve 12, a second emptying pipeline 33 and an outlet shutoff valve 16, wherein the large-range flow meter 8 and the small-range flow meter 10 are used for measuring a hydrogen real-time flow value, and the zero setting valve 12 is used for zero setting of the flow meters and is in a normally open state; the outlet shutoff valve 16 is used to control whether hydrogen gas is discharged from the measuring device, and is normally closed, i.e., kept closed when the measuring device is not performing measuring operation, and opened when the measuring device is performing hydrogen gas consumption measuring operation. The both ends of first exhaust pipe way 32 communicate with main line 31 and external respectively, have set gradually first exhaust-valve 4 and second check valve 5 on the first exhaust-valve way 32, and first exhaust-valve 4 is normally open state, and through opening first exhaust-valve 4 and carry out the evacuation to the gas in the pipeline, second check valve 5 is used for guaranteeing the gaseous folk prescription of evacuation to flowing, can not take place the refluence. The both ends of second evacuation pipeline 33 communicate with main line 31 and external world respectively, have set gradually second blowoff valve 15 and third check valve 14 on the second evacuation pipeline 33, and second blowoff valve 15 is normally open state, and through opening second blowoff valve 15 and carry out the evacuation to the gas in the pipeline, third check valve 14 is used for guaranteeing that the gaseous folk prescription of evacuation flows, can not take place the refluence. The nitrogen gas inlet pipeline 30 is provided with a purging valve 27 and a fourth one-way valve 28, the purging valve 27 is used for controlling whether the nitrogen gas purges the measuring device, the nitrogen gas purging valve is in a normally closed state, namely, the nitrogen gas purging valve is kept in a closed state when the nitrogen gas is not introduced, the nitrogen gas purging valve is opened when the nitrogen gas is used, and the fourth one-way valve 28 is used for ensuring that the nitrogen gas entering the pipeline of the measuring device flows in a single direction and does not flow backwards. Both ends of the bypass pipeline 34 are connected with the main pipeline 31, a bypass valve 9 is arranged on the bypass pipeline 34, the bypass valve 9 is connected with one side of the small-range flowmeter 10 in parallel, and the bypass valve 9 is used for controlling whether hydrogen passes through the small-range flowmeter 10 or not and is in a normally open state. The inlet shutoff valve 1, the purge valve 27, the first evacuation valve 4, the bypass valve 9, the zero setting valve 12, the second evacuation valve 15 and the outlet shutoff valve 16 are all connected with a control pipeline system, and the control pipeline system, the wide-range flowmeter 8 and the small-range flowmeter 10 are all connected with a controller.
The main pipe 31 is provided with an inlet pressure regulating valve 3, the inlet pressure regulating valve 3 is arranged between the hydrogen gas introducing pipe 29 and the first emptying pipe 32, and the inlet pressure regulating valve 3 is connected with the controller. The inlet pressure regulating valve 3 can regulate the pressure at the inlet of the main pipeline 31 and reduce the influence of the pressure fluctuation of the hydrogen gas on the flowmeter.
The main pipeline 31 is provided with an outlet pressure regulating valve 13, the outlet pressure regulating valve 13 is arranged between the zero regulating valve 12 and the second emptying pipeline 33, and the outlet pressure regulating valve 13 is connected with a controller. The outlet pressure regulating valve 13 is used to regulate the pressure in the line after the small-range flow meter 10.
Be provided with first pressure sensor 7 on the main line 31, second pressure sensor 11 and third pressure sensor 17, first pressure sensor 7, second pressure sensor 11 and third pressure sensor 17 all are connected with the controller, first pressure sensor 7 sets up between first evacuation pipeline 32 and wide range flowmeter 8, first pressure sensor 7 is used for measuring the gas pressure before passing through wide range flowmeter 8, second pressure sensor 11 sets up between small-scale flowmeter 10 and zero setting valve 12, second pressure sensor 11 is used for measuring the gas pressure after passing through small-scale flowmeter 10, third pressure sensor 17 sets up in the one side that second evacuation pipeline 33 was kept away from to export shutoff valve 16, third pressure sensor 17 is used for measuring the gas pressure of pipeline export.
Still include the safety line 35 in this embodiment, be provided with the relief valve 6 on the safety line 35, the both ends of safety line 35 are connected with main line 31 and first exhaust line 32 respectively, and the one end that safety line 35 and main line 31 are connected sets up between first exhaust line 32 and first pressure sensor 7, and the one end that safety line 35 and first exhaust line 32 are connected sets up in the one side that first blowoff valve 4 was kept away from to second check valve 5. By arranging the safety valve 6, when the pipeline inlet pressure exceeds the maximum pressure which can be borne by the measuring device, or when the inlet pressure regulating valve 3 and the outlet pressure regulating valve 13 fail, the safety valve 6 is opened to perform pressure relief, so that the measuring device is protected from being damaged.
The inlet shutoff valve 1, the purge valve 27, the first evacuation valve 4, the bypass valve 9, the zero setting valve 12, the second evacuation valve 15 and the outlet shutoff valve 16 in this embodiment are all driven by compressed air. Specifically, the control pipeline system comprises a compressed air inlet pipeline 36, a first branch pipeline 37, a second branch pipeline 38, a third branch pipeline 39, a fourth branch pipeline 40, a fifth branch pipeline 41, a sixth branch pipeline 42 and a seventh branch pipeline 43; two ends of the first branch pipeline 37 are respectively connected with the compressed air inlet pipeline 36 and the inlet shutoff valve 1, a first electromagnetic valve 18 is arranged on the first branch pipeline 37, and the first electromagnetic valve 18 is used for controlling the opening and closing of the inlet shutoff valve 1; two ends of the second branch pipeline 38 are respectively connected with the compressed air inlet pipeline 36 and the purge valve 27, a second electromagnetic valve 19 is arranged on the second branch pipeline 38, and the second electromagnetic valve 19 is used for controlling the opening and closing of the purge valve 27; two ends of the third branch pipeline 39 are respectively connected with the compressed air inlet pipeline 36 and the first exhaust valve 4, a third electromagnetic valve 20 is arranged on the third branch pipeline 39, and the third electromagnetic valve 20 is used for controlling the opening and closing of the first exhaust valve 4; two ends of a fourth branch pipeline 40 are respectively connected with the compressed air inlet pipeline 36 and the bypass valve 9, a fourth electromagnetic valve 21 is arranged on the fourth branch pipeline 40, and the fourth electromagnetic valve 21 is used for controlling the opening and closing of the bypass valve 9; two ends of a fifth branch pipeline 41 are respectively connected with the compressed air inlet pipeline 36 and the zero setting valve 12, a fifth electromagnetic valve 22 is arranged on the fifth branch pipeline 41, and the fifth electromagnetic valve 22 is used for controlling the opening and closing of the zero setting valve 12; two ends of the sixth branch pipeline 42 are respectively connected with the compressed air introducing pipeline 36 and the second exhaust valve 15, a sixth electromagnetic valve 23 is arranged on the sixth branch pipeline 42, and the sixth electromagnetic valve 23 is used for controlling the second exhaust valve 15 to open and close; both ends of the seventh branch pipeline 43 are respectively connected with the compressed air inlet pipeline 36 and the outlet shutoff valve 16, a seventh electromagnetic valve 24 is arranged on the seventh branch pipeline 43, and the seventh electromagnetic valve 24 is used for controlling the opening and closing of the outlet shutoff valve 16. The first solenoid valve 18, the second solenoid valve 19, the third solenoid valve 20, the fourth solenoid valve 21, the fifth solenoid valve 22, the sixth solenoid valve 23 and the seventh solenoid valve 24 are all connected with the controller.
The compressed air inlet pipeline 36 is sequentially provided with a compressed air pressure regulating valve 26 and a fourth pressure sensor 25, the compressed air pressure regulating valve 26 and the fourth pressure sensor 25 are both connected with the controller, the compressed air pressure regulating valve 26 is used for regulating the pressure of the inlet of the compressed air inlet pipeline 36, and the fourth pressure sensor 25 is used for measuring the gas pressure of the inlet of the compressed air inlet pipeline 36.
In this embodiment, both the large-range flow meter 8 and the small-range flow meter 10 employ high-accuracy coriolis mass flow meters. The measuring range of the wide-range flowmeter 8 is 1.0-8.0kg/h, the error value of the wide-range flowmeter 8 is shown in figure 2, and when the flow rate is more than 1.0kg/h, the error is 0.5 percent, so that the wide-range flowmeter 8 has large error when measuring small flow rate. The range of the small-range flowmeter 10 is 0-1.2kg/h, the error value of the small-range flowmeter 10 is shown in figure 3, and when the flow is more than 0.2kg/h, the error is 0.5%; when the flow is 0.08kg/h, the error is 1%, and therefore when the flow is measured at a small flow, the error of the small-range flow meter 10 is obviously smaller than that of the large-range flow meter 8, and when the flow is measured at a small flow, the small-range flow meter 10 is selected, so that the measurement error can be reduced, and the measurement precision is improved.
The main flow principle of the hydrogen consumption measuring device 100 for the hydrogen fuel cell vehicle in the embodiment is as follows: before measuring the hydrogen consumption, the measuring device needs to be subjected to nitrogen replacement and hydrogen replacement, and the condition for measuring the hydrogen consumption is met after the gas replacement is completed.
When the test starts, firstly, nitrogen purging is carried out on the pipeline of the measuring device, gas in the pipeline is replaced, and other impurity gases except nitrogen are not doped in the pipeline. Initially, the inlet shutoff valve 1, the purge valve 27, and the outlet shutoff valve 16 are closed, and the first evacuation valve 4, the second evacuation valve 15, the bypass valve 9, and the zero-setting valve 12 are opened. The specific flow of nitrogen replacement is as follows:
1) closing the first and second evacuation valves 4, 15;
2) as shown in fig. 4, the purge valve 27 is opened to fill the measuring device line with nitrogen;
3) as shown in fig. 5, the purge valve 27 is closed;
4) as shown in fig. 6, the first evacuation valve 4 and the second evacuation valve 15 are opened to discharge the nitrogen gas in the pipeline;
5) repeating the steps 1) to 4) for 10 times.
The nitrogen substitution is followed by hydrogen substitution. Initially, the inlet shutoff valve 1, the purge valve 27, and the outlet shutoff valve 16 are closed, and the first evacuation valve 4, the second evacuation valve 15, the bypass valve 9, and the zero-setting valve 12 are opened. The specific process of hydrogen replacement is as follows:
1) closing the first and second evacuation valves 4, 15;
2) as shown in fig. 7, the inlet shutoff valve 1 is opened to fill the measuring device piping with hydrogen;
3) as shown in fig. 8, the inlet shutoff valve 1 is closed;
4) as shown in fig. 9, the first evacuation valve 4 and the second evacuation valve 15 are opened to discharge the hydrogen gas in the pipeline;
5) repeating the steps 1) to 4) for 10 times.
To ensure that the flow meter measures accurately, the flow meter needs to be zeroed before measuring the hydrogen consumption. Initially, the inlet shutoff valve 1, the purge valve 27, and the outlet shutoff valve 16 are closed, and the first evacuation valve 4, the second evacuation valve 15, the bypass valve 9, and the zero-setting valve 12 are opened. The large-range flowmeter 8 and the small-range flowmeter 10 are respectively zeroed in the hydrogen replacement process, and the specific process is as follows:
1) closing the first and second evacuation valves 4, 15;
2) opening an inlet shutoff valve 1 to fill the pipeline of the measuring device with hydrogen;
3) closing the inlet shutoff valve 1;
4) the zero valve 12 is closed and the software performs zero adjustment for the large range flow meter 8 and the small range flow meter 10, waiting for line pressure to stabilize.
5) And opening the zero setting valve 12, the first exhaust valve 4 and the second exhaust valve 15 to exhaust the hydrogen in the pipeline.
And then, measuring the consumption of hydrogen, wherein the initial state is that the inlet shutoff valve 1, the purge valve 27 and the outlet shutoff valve 16 are closed, the first emptying valve 4, the second emptying valve 15, the bypass valve 9 and the zero setting valve 12 are opened, the states of the valves are adjusted according to the measurement requirements, specifically, the first emptying valve 4 and the second emptying valve 15 are closed, the inlet shutoff valve 1 and the outlet shutoff valve 16 are opened, and hydrogen enters the measuring device through the inlet shutoff valve 1 and then reaches the large-range flow meter 8 through the first one-way valve 2 and the inlet pressure regulating valve 3. Different hydrogen flow rates can occur in the measurement process of the hydrogen consumption, and different flow meters are required to be selected for measurement.
The flow rate value of the wide range flow meter 8 is initially taken as a basis for calculating the hydrogen consumption amount. Then, according to the real-time flow of the hydrogen, a corresponding measuring method is automatically selected from the following two measuring methods:
under the condition that the bypass valve 9 is opened and the large-range flow meter 8 is used for calculating the hydrogen consumption, when the hydrogen flow of the large-range flow meter 8 is less than 1.0kg/h, the bypass valve 9 is closed, and the flow value of the small-range flow meter 10 is used as the basis for calculating the hydrogen consumption.
Under the condition that the bypass valve 9 is closed and the small-range flow meter 10 is used for calculating the hydrogen consumption, when the hydrogen flow of the small-range flow meter 10 is larger than 1.2kg/h, the bypass valve 9 is opened, and the flow value of the large-range flow meter 8 is used as the basis for calculating the hydrogen consumption.
The hydrogen flow is measured in real time by the large-range flowmeter 8 or the small-range flowmeter 10 to obtain the real-time consumption of hydrogen, and the real-time flow is integrated to obtain the integrated value of the hydrogen consumption.
The threshold values for switching the large-range flow meter 8 to the small-range flow meter 10 and switching the small-range flow meter 10 to the large-range flow meter 8 are set to different values, considering the case where the flow rate stabilizes near the threshold values for switching the large-range flow meter 8 and the small-range flow meter 10, causing the bypass valve 9 to be frequently opened and closed, resulting in unstable gas pressure and flow rate values that affect the meter measurement values. In the embodiment, the threshold value of the large-range flow meter 8 for switching the small-range flow meter 10 is 1.0kg/h, namely when the flow is less than 1.0kg/h, the large-range flow meter is switched to the small-range flow meter 10; the threshold value of the small-range flowmeter 10 for switching the large-range flowmeter 8 to be 1.2kg/h, namely when the flow rate is more than 1.2kg/h, the large-range flowmeter 8 is switched to.
It can be seen that, in this embodiment, the measurement device is subjected to nitrogen replacement and hydrogen replacement, and the condition for measuring the hydrogen consumption is met after the gas replacement is completed. The mass flowmeters with two different measuring ranges are adopted, when the hydrogen flow changes, the flowmeter in the corresponding measuring range is selected according to the flow, the hydrogen flow can be accurately measured, and the mass flowmeters can be suitable for different working conditions of vehicles.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A hydrogen fuel cell automobile hydrogen consumption measuring device is characterized by comprising a main pipeline, a hydrogen inlet pipeline, a nitrogen inlet pipeline, a first emptying pipeline, a second emptying pipeline, a bypass pipeline, a control pipeline system and a controller, wherein the hydrogen inlet pipeline and the nitrogen inlet pipeline are connected with the same end of the main pipeline, an inlet shutoff valve and a first one-way valve are sequentially arranged on the hydrogen inlet pipeline, the first emptying pipeline, a wide-range flowmeter, a small-range flowmeter, a zero-setting valve, the second emptying pipeline and an outlet shutoff valve are sequentially arranged on the main pipeline, two ends of the first emptying pipeline are respectively communicated with the main pipeline and the outside, a first emptying valve and a second one-way valve are sequentially arranged on the first emptying pipeline, two ends of the second emptying pipeline are respectively communicated with the main pipeline and the outside, the second emptying pipe is sequentially provided with a second emptying valve and a third one-way valve, the nitrogen gas inlet pipe is provided with a purging valve and a fourth one-way valve, two ends of the bypass pipe are connected with the main pipe, the bypass pipe is provided with a bypass valve, the bypass valve is connected to one side of the small-range flow meter in parallel, the inlet shutoff valve, the purging valve, the first emptying valve, the bypass valve, the zero-setting valve, the second emptying valve and the outlet shutoff valve are connected with the control pipe system, and the control pipe system, the large-range flow meter and the small-range flow meter are connected with the controller.
2. The hydrogen consumption measuring device for the hydrogen fuel cell vehicle as claimed in claim 1, wherein an inlet pressure regulating valve is provided on the main pipe, the inlet pressure regulating valve is provided between the hydrogen gas introducing pipe and the first exhaust pipe, and the inlet pressure regulating valve is connected to the controller.
3. The hydrogen consumption measuring device for hydrogen fuel cell vehicles according to claim 2, wherein an outlet pressure regulating valve is provided on the main line, the outlet pressure regulating valve is provided between the zero valve and the second evacuation line, and the outlet pressure regulating valve is connected to the controller.
4. The hydrogen consumption measuring device for the hydrogen fuel cell vehicle according to claim 3, wherein a first pressure sensor, a second pressure sensor and a third pressure sensor are provided on the main line, the first pressure sensor is provided between the first evacuation line and the wide range flow meter, the second pressure sensor is provided between the small range flow meter and the zero-setting valve, the third pressure sensor is provided on a side of the outlet shutoff valve away from the second evacuation line, and the first pressure sensor, the second pressure sensor and the third pressure sensor are all connected to the controller.
5. The hydrogen consumption measuring device for the hydrogen fuel cell vehicle as claimed in claim 4, further comprising a safety pipeline, wherein a safety valve is disposed on the safety pipeline, two ends of the safety pipeline are respectively connected to the main pipeline and the first emptying pipeline, one end of the safety pipeline connected to the main pipeline is disposed between the first emptying pipeline and the first pressure sensor, and one end of the safety pipeline connected to the first emptying pipeline is disposed on a side of the second one-way valve away from the first emptying valve.
6. The hydrogen consumption measuring device of the hydrogen fuel cell vehicle as claimed in claim 1, wherein the control pipeline system comprises a compressed air inlet pipeline, a first branch pipeline, a second branch pipeline, a third branch pipeline, a fourth branch pipeline, a fifth branch pipeline, a sixth branch pipeline and a seventh branch pipeline; two ends of the first branch pipeline are respectively connected with the compressed air inlet pipeline and the inlet shutoff valve, and a first electromagnetic valve is arranged on the first branch pipeline; two ends of the second branch pipeline are respectively connected with the compressed air inlet pipeline and the purge valve, and a second electromagnetic valve is arranged on the second branch pipeline; two ends of the third branch pipeline are respectively connected with the compressed air inlet pipeline and the first emptying valve, and a third electromagnetic valve is arranged on the third branch pipeline; two ends of the fourth branch pipeline are respectively connected with the compressed air inlet pipeline and the bypass valve, and a fourth electromagnetic valve is arranged on the fourth branch pipeline; two ends of the fifth branch pipeline are respectively connected with the compressed air inlet pipeline and the zero setting valve, and a fifth electromagnetic valve is arranged on the fifth branch pipeline; two ends of the sixth branch pipeline are respectively connected with the compressed air inlet pipeline and the second emptying valve, and a sixth electromagnetic valve is arranged on the sixth branch pipeline; two ends of the seventh branch pipeline are respectively connected with the compressed air inlet pipeline and the outlet shutoff valve, and a seventh electromagnetic valve is arranged on the seventh branch pipeline; the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve and the seventh solenoid valve are all connected with the controller.
7. The hydrogen consumption measuring device of the hydrogen fuel cell vehicle as claimed in claim 6, wherein a compressed air pressure regulating valve and a fourth pressure sensor are sequentially arranged on the compressed air inlet pipeline, and both the compressed air pressure regulating valve and the fourth pressure sensor are connected with the controller.
8. The hydrogen consumption measuring device of the hydrogen fuel cell vehicle as claimed in claim 1, wherein the wide-range flow meter has a range of 1.0 to 8.0kg/h, and the small-range flow meter has a range of 0 to 1.2 kg/h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011549417.5A CN114659798A (en) | 2020-12-24 | 2020-12-24 | Hydrogen consumption measuring device for hydrogen fuel cell automobile |
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| CN202011549417.5A CN114659798A (en) | 2020-12-24 | 2020-12-24 | Hydrogen consumption measuring device for hydrogen fuel cell automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116026624A (en) * | 2023-02-10 | 2023-04-28 | 四川晟蔚智能科技有限公司 | Single-pass water vapor decomposition efficiency testing system and testing method of water vapor decomposition device |
| AT525900B1 (en) * | 2022-06-13 | 2023-09-15 | Avl List Gmbh | Consumption measurement system for vehicles with a fuel cell unit or a drive powered by natural gas and method for measuring consumption on vehicles with a fuel cell unit or a drive powered by natural gas |
-
2020
- 2020-12-24 CN CN202011549417.5A patent/CN114659798A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT525900B1 (en) * | 2022-06-13 | 2023-09-15 | Avl List Gmbh | Consumption measurement system for vehicles with a fuel cell unit or a drive powered by natural gas and method for measuring consumption on vehicles with a fuel cell unit or a drive powered by natural gas |
| AT525900A4 (en) * | 2022-06-13 | 2023-09-15 | Avl List Gmbh | Consumption measurement system for vehicles with a fuel cell unit or a drive powered by natural gas and method for measuring consumption on vehicles with a fuel cell unit or a drive powered by natural gas |
| CN116026624A (en) * | 2023-02-10 | 2023-04-28 | 四川晟蔚智能科技有限公司 | Single-pass water vapor decomposition efficiency testing system and testing method of water vapor decomposition device |
| CN116026624B (en) * | 2023-02-10 | 2023-07-18 | 中核四川环保工程有限责任公司 | Single-pass water vapor decomposition efficiency testing system and testing method of water vapor decomposition device |
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