CN116335818A - Hydrogen engine nozzle flow measuring device and measuring method - Google Patents
Hydrogen engine nozzle flow measuring device and measuring method Download PDFInfo
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- CN116335818A CN116335818A CN202310000252.3A CN202310000252A CN116335818A CN 116335818 A CN116335818 A CN 116335818A CN 202310000252 A CN202310000252 A CN 202310000252A CN 116335818 A CN116335818 A CN 116335818A
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 151
- 239000001257 hydrogen Substances 0.000 title claims abstract description 142
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 147
- 238000005259 measurement Methods 0.000 claims abstract description 41
- 239000007789 gas Substances 0.000 claims abstract description 36
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 15
- 239000007924 injection Substances 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 14
- 238000012360 testing method Methods 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000007921 spray Substances 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 4
- 238000011161 development Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 150000002431 hydrogen Chemical class 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating or supervising devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0206—Non-hydrocarbon fuels, e.g. hydrogen, ammonia or carbon monoxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
- F02M21/0239—Pressure or flow regulators therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Abstract
The invention relates to a flow measuring device of a nozzle of a hydrogen engine, which comprises a hydrogen storage container, a valve arranged at the mouth part of the hydrogen storage container and a pressure stabilizing cavity connected with the valve through a pipeline; the hydrogen gas injection device is characterized by further comprising a hydrogen gas nozzle connected with the pressure stabilizing cavity through a pipeline, wherein the hydrogen gas nozzle is arranged at the upper end of a closed water tank, the upper end of the closed water tank is further provided with a water injection valve, a water drain valve, a gas release valve and a temperature and pressure acquisition unit, and the temperature and pressure acquisition unit and the hydrogen gas nozzle are electrically connected with a control system. And also relates to a method for measuring the flow of the nozzle of the hydrogen engine. The device has the advantages of simple structure, convenient installation, accurate measurement result, safe and efficient operation process, and can solve the problem of measuring the injection flow of the hydrogen nozzle of the hydrogen engine and provide flow data of the hydrogen nozzle for engine development.
Description
Technical Field
The invention relates to engine performance measurement, in particular to a device and a method for measuring flow of a nozzle of a hydrogen engine.
Background
CN 107100762a discloses a "hydrogen nozzle of a hydrogen fuel engine", which comprises a nozzle upper part, a nozzle lower nozzle section and a hydrogen supply pipeline, wherein the nozzle upper part is provided with a hydrogen collecting cavity, and the hydrogen supply pipeline of the nozzle is connected with the hydrogen collecting cavity. In the engine development process, CFD simulation of a combustion system is a key development mode, and an oil injection rate curve of an oil injector is required to be used as an important input parameter of a simulation model. However, since most fuel injector suppliers do not have this measurement capability, they cannot provide relevant measurement parameters, and there are few companies that can perform fuel injector flow measurements for gasoline engines.
With hydrogen engine development and application, measurement of hydrogen nozzle flow becomes a troublesome matter in the hydrogen engine development process. First, there are few manufacturers and organizations developing hydrogen engines at home and abroad, and no company developing hydrogen nozzle flow measuring devices. In addition, from the analysis of physical properties of hydrogen, hydrogen molecules are small, so that leakage and flammability are easy. The flow measurement of the hydrogen nozzle cannot be performed by means of a gasoline nozzle.
In the development process of the hydrogen internal combustion engine, flow data of the hydrogen nozzle plays an important role in the development of the hydrogen nozzle by a product department and the calculation of nozzle performance evaluation and in-cylinder combustion by a CFD department. In view of the importance of hydrogen nozzle flow data to engine development, there is a strong need to develop an advanced, efficient hydrogen nozzle flow measurement method and apparatus.
CN 206593861U discloses a universal natural gas engine nozzle flow measuring device, comprising a compressed air tank, a multifunctional pressure stabilizing cavity, an original gas nozzle, a transition piece, a pressure stabilizing power supply, a controller and a flowmeter. The multifunctional pressure stabilizing cavity comprises an upper cavity and a lower cavity which are detachably connected, wherein the upper cavity is provided with an upper pressure stabilizing cavity, a flowmeter interface, a transition piece upper interface and a gas nozzle upper interface; the lower cavity is provided with a lower pressure stabilizing cavity, an air inlet interface, a transition piece lower interface and a gas nozzle lower interface; the transition piece is internally provided with a placing groove, an air inlet pipeline and an air outlet pipeline. One end of the controller is connected with the stabilized voltage power supply, and the other end of the controller is sequentially and detachably electrically connected with the primary gas nozzle I and the primary gas nozzle II. The intelligent gas flow meter can drive the gas nozzle through the analog signal under the offline state of the engine, measures the flow of the gas nozzle by the flow meter, has strong universality and can be used for evaluating the flow states of various gas nozzles. The solution disclosed in this patent document is not a beneficial attempt in the art.
Disclosure of Invention
The invention aims to provide a flow measuring device for a hydrogen engine nozzle, which has the advantages of simple structure, convenience in installation, accurate measurement result, safe and efficient operation process, and can solve the problem of measuring the injection flow of the hydrogen engine nozzle and provide flow data of the hydrogen nozzle for developing an engine. The invention also provides a method for measuring the flow of the nozzle of the hydrogen engine.
From the physical property of hydrogen, hydrogen is extremely difficult to dissolve in water, and 1 liter of water can only dissolve 0.01819 liters of hydrogen, so that a water draining and collecting method can be adopted, and the volume of water can be obtained by dividing the mass of discharged water by the density of water, and is equal to the volume of hydrogen sprayed by a nozzle in unit time. The method is based on the physical property that hydrogen is difficult to dissolve in water, and adopts a drainage and gas collection method for measuring the hydrogen spraying flow of a hydrogen nozzle.
Drainage and gas collection method measurement principle: if a gas which is not easy to dissolve in the liquid and does not react with the liquid is reversely introduced into a gas collecting bottle filled with the liquid. The liquid in the container can be discharged, the container is filled with the gas, and the gas can be collected by discharging certain liquid by directly utilizing the gas collecting bottle according to the principle (by utilizing the principle of pressure).
The present invention was made on the basis of the principle and test of the above-described drainage and gas collection method.
The flow measuring device of the nozzle of the hydrogen engine comprises a hydrogen storage container, a valve arranged at the mouth part of the hydrogen storage container and a pressure stabilizing cavity connected with the valve through a pipeline; the device is characterized by further comprising a hydrogen nozzle connected with the pressure stabilizing cavity through a pipeline, wherein the hydrogen nozzle is arranged at the upper end of a closed water tank, the upper end of the closed water tank is further provided with a water filling valve, a water discharging valve, a gas discharging valve and a temperature and pressure acquisition unit, and the temperature and pressure acquisition unit is electrically connected with the control system.
Further, a pressure limiting valve is arranged in a connecting pipeline of the valve and the pressure stabilizing cavity; and a pressure regulating valve is arranged in a connecting pipeline of the pressure stabilizing cavity and the hydrogen nozzle.
Further, the closed water tank is U-shaped, and the left side is the A part and the right side is the B part.
Further, the hydrogen nozzle is installed at the middle part of the upper end of the A part of the closed water tank.
Further, the water injection valve is arranged at a position which is far left in the middle of the upper end of the B part of the closed water tank.
Further, the drain valve is installed at a position on the right side of the middle of the upper end of the B part of the closed water tank.
Further, the air release valve is arranged at the middle left part of the upper end of the A part of the closed water tank.
Further, the temperature and pressure acquisition unit is arranged at the right part of the middle of the upper end of the A part of the closed water tank.
Further, a hydrogen nozzle installed at the middle part of the upper end of the A part of the closed water tank is electrically connected with the control system.
The invention relates to a method for measuring the flow of a nozzle of a hydrogen engine, which is carried out on the device for measuring the flow of the nozzle of the hydrogen engine and comprises the following steps:
firstly, checking the air tightness of a measuring device; before the measurement is started, a water drain valve and a gas release valve are opened; then the water filling valve is opened, water is filled into the U-shaped closed water tank until water flows out from the water discharging valve and the air discharging valve; then, sequentially closing the water filling valve, the water discharging valve and the air discharging valve;
secondly, spraying hydrogen into the U-shaped closed water tank; firstly, opening a water drain valve, then opening a valve of a hydrogen storage container, and introducing high-pressure hydrogen into a pipeline; after the hydrogen is subjected to pressure limiting through a pressure limiting valve, the pressure is reduced to a pressure range which can be used by a hydrogen nozzle, and then the hydrogen enters a pressure stabilizing cavity; after the hydrogen with reduced pressure passes through the pressure stabilizing cavity, the pressure is further accurately regulated to the working pressure of the hydrogen nozzle through the pressure regulating valve, and then the hydrogen is conveyed to the hydrogen nozzle through a pipeline; after receiving the injection signal, the hydrogen nozzle starts to inject hydrogen into the U-shaped closed water tank; when a certain amount of hydrogen is flushed into the U-shaped closed water tank A, water flows out of the U-shaped closed water tank A;
thirdly, starting measurement; the water discharge valve (after a part of water flows out, the measurement can be formally started after the hydrogen filled in the U-shaped closed water tank A part is stabilized, in the measurement process, the spray nozzle needs to perform three-wheel spraying, the spraying times of each wheel are limited to 10 times, three beakers are respectively used for taking the water discharged in the three-wheel spraying process, weighing and recording data, the quality of the three-wheel water is divided after the three-wheel water is averaged, the quality of the water discharged in the one-wheel spraying process can be obtained, and the temperature and the pressure of the hydrogen in the test process are monitored through the temperature and pressure acquisition unit;
fourth step: collecting residual gas; after the measurement is finished, opening a gas release valve to release hydrogen generated in the measurement, and collecting the hydrogen through a container;
fifth step: data processing;
the mass Q (g) of the water discharged in the measurement:
the volume of this water was determined by the following formula, which was equal to the volume of hydrogen injected by a single hydrogen nozzle;
Q＝ρ*V
wherein:
q-is the mass of water in g;
ρ is the density of water in g/cm3;
v-is the volume of the discharged water, in cm3.
The invention has the beneficial effects that:
the flow measuring device of the nozzle of the hydrogen engine based on the principle and the test of the water and gas collecting method has the advantages of simple structure, convenient installation, accurate measuring result, safe and efficient operation process; the method solves the measurement problem of the jet flow of the hydrogen nozzle of the hydrogen engine, and provides flow data of the hydrogen nozzle for engine development.
Drawings
FIG. 1 is a schematic diagram of a drainage and gas collection measurement device;
fig. 2 is a schematic structural view of the present invention.
In the figure (technical features indicated by the marks):
in the figure (technical features indicated by the marks):
1-an iron stand, 2-an alcohol lamp, 3-a test tube, 4-potassium permanganate, 5-a test tube plug, 6-a test tube clamp, 7-an air duct, 8-an air collecting bottle and 9-a water tank;
20-hydrogen storage container, 21-valve, 22-pressure limiting valve, 23-pressure stabilizing cavity, 24-pressure regulating valve, 25-hydrogen nozzle, 26-closed water tank, 27-water filling valve, 28-water drain valve and 29-air release valve;
30-a control system, 31-a temperature and pressure acquisition unit.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
See the test apparatus of the drainage and air collection method shown in fig. 1: firstly, filling a proper amount of potassium permanganate 4 and other reactants at the bottom of a test tube 3, and then plugging the mouth of the test tube 3 by a test tube plug 5 with an air duct 7; then, fixing the test tube 3 on the iron stand 1 by using a test tube clamp 6, and inclining the tube orifice of the test tube 3 downwards by a certain angle to prevent water generated in the test process from flowing to the bottom of the test tube to cause the burst of the test tube; then one end of the air duct 7 is fixed on the test tube plug 5, the other end extends into the air collecting bottle 8 filled with water, and the air collecting bottle is reversely buckled in the water tank 9; finally, the alcohol lamp 2 is placed on the iron stand 1, the alcohol lamp 2 is ignited, the bottom of the test tube 3 is uniformly heated by using the outer flame of the alcohol lamp, oxygen is generated after chemical substances in the test tube react, and the oxygen enters the gas collecting bottle 8 through the gas guide tube 7. Because oxygen is insoluble in water, along with the continuous production of oxygen, water in the gas collection bottle 8 is continuously discharged, flows into the water tank 9, and when the gas collection bottle 8 is about to collect full oxygen, the alcohol lamp can be extinguished, so that a bottle of pure oxygen is obtained.
Referring to FIG. 2, a flow measuring device for a nozzle of a hydrogen engine comprises a hydrogen storage container 20, a valve 21 arranged at the mouth of the hydrogen storage container, and a pressure stabilizing cavity 23 connected with the valve 21 through a pipeline; the hydrogen gas injection device is characterized by further comprising a hydrogen gas nozzle 25 connected with the pressure stabilizing cavity 23 through a pipeline, wherein the hydrogen gas nozzle 25 is arranged at the upper end of a closed water tank 26, a water injection valve 27, a water drain valve 28, a gas release valve 29 and a temperature and pressure acquisition unit 31 are further arranged at the upper end of the closed water tank 26, and the temperature and pressure acquisition unit 31 is electrically connected with a control system 30.
A pressure limiting valve 22 is arranged in a connecting pipeline of the valve 21 and the pressure stabilizing cavity 23, and the pressure limiting valve has the function of intercepting high-pressure hydrogen in the hydrogen storage container so as to reduce the pressure of the gas in the whole pipeline; a pressure regulating valve 24 is provided in the connection line between the pressure stabilizing chamber 23 and the hydrogen nozzle 25. The pressure stabilizing cavity has the functions of buffering air flow and stabilizing pressure in the pipeline.
The closed water tank 26 is U-shaped, and the left side is A part and the right side is B part.
The hydrogen gas nozzle 25 is mounted at the middle of the upper end of the a part of the closed water tank 26.
The water filling valve 27 is installed at a position on the left side of the middle of the upper end of the B part of the closed water tank 26.
The drain valve 28 is installed at a position on the middle right side of the upper end of the B part of the closed water tank 26.
The air release valve 29 is installed at a position far to the left in the middle of the upper end of the A part of the closed water tank 26.
The temperature and pressure acquisition unit 31 is arranged at the right part of the middle of the upper end of the A part of the closed water tank 26.
The hydrogen gas nozzle 25 mounted at the middle of the upper end of the a part of the closed water tank 26 is electrically connected to the control system 30.
According to the physical property that hydrogen is insoluble in water, the invention adopts a water drainage and gas collection method to collect hydrogen. The device has the advantages of shallow and understandable principle, simple structure, easy processing and convenient installation, safe and efficient whole measurement process and strong operability. The test device mainly comprises a hydrogen storage container, a pressure stabilizing cavity, a pipeline, a valve, a hydrogen nozzle, a closed water tank, a temperature and pressure acquisition unit and a control system. The volume of the hydrogen sprayed from the hydrogen nozzle in unit time is embodied in the form of water of unit mass by a water drainage method through a valve, a pipeline and a control system, and the volume of the discharged water is equal to the volume of the hydrogen.
The invention relates to a method for measuring the flow of a nozzle of a hydrogen engine, which is carried out on the device for measuring the flow of the nozzle of the hydrogen engine and comprises the following steps:
firstly, checking the air tightness of a measuring device; before the measurement is started, the water drain valve 28 and the air release valve 29 are opened; then the water filling valve 27 is opened to fill water into the U-shaped closed water tank 26 until water flows out from the water drain valve 28 and the air release valve 29; then, the water filling valve 27, the water discharging valve 28, and the air discharging valve 29 are sequentially closed; in the whole process, the water leakage of the other joints except the water drain valve and the air release valve is guaranteed, so that the existence of residual air in the U-shaped closed water tank can be determined, the accurate measurement result is guaranteed, and the operation is safe; since hydrogen is easily burned with great risk, the air tightness check is a step that must be completed first.
Secondly, spraying hydrogen into the U-shaped closed water tank;
firstly, opening a water drain valve 28, then opening a valve 21 of the hydrogen storage container 20, and introducing high-pressure hydrogen into a pipeline; after the hydrogen is subjected to pressure limiting through the pressure limiting valve 3, the pressure is reduced to a pressure range which can be used by the hydrogen nozzle 25, and then the hydrogen enters the pressure stabilizing cavity 23; because the hydrogen pipeline is thinner, the fluctuation of high-pressure gas is serious due to the switching adjustment of the valve, and the pressure stabilizing cavity plays roles of buffering air flow and stabilizing the pressure in the pipeline. After passing through the pressure stabilizing cavity 23, the hydrogen after the pressure is reduced is further precisely regulated to the working pressure of the hydrogen nozzle 25 by the pressure regulating valve 24, and then is conveyed to the hydrogen nozzle 25 through a pipeline. After receiving the injection signal, the hydrogen nozzle 25 starts to inject hydrogen into the U-shaped closed water tank 26; when a certain amount of hydrogen is filled into the U-shaped closed water tank 26A, water flows out from the U-shaped closed water tank;
thirdly, starting measurement; after the water drain valve 28 flows out a part of water, the measurement can be formally started after the hydrogen filled in the U-shaped closed water tank 26A is stabilized; in the measuring process, the spray nozzle needs to spray three rounds, the spraying times of each round is limited to 10 times, three beakers are used for respectively taking water discharged in the three-round spraying process, and the water is weighed and data are recorded; after the quality of three rounds of water is averaged, dividing the three rounds of water by 10 to obtain the quality of water discharged in the process of one round of injection; the temperature and pressure of the hydrogen gas during the test are monitored by the temperature and pressure acquisition unit 31. The collected pressure and temperature parameters are collected, processed and stored by a data acquisition control system 30;
fourth step: collecting residual gas; after the measurement is completed, the air release valve 29 is opened to release the hydrogen generated in the measurement and collect the hydrogen through the container;
fifth step: data processing;
the mass Q (g) of the water discharged in the measurement is recorded with the following table:
the volume of this water was determined by the following formula, and this volume was equal to the volume of hydrogen gas injected by a single hydrogen nozzle.
Q＝ρ*V
Wherein:
q-is the mass of water in g;
ρ is the density of water in g/cm3;
v-is the volume of the discharged water, in cm3.
Claims (10)
1. The utility model provides a hydrogen engine nozzle flow measuring device, includes hydrogen storage container (20), establishes valve (21) at hydrogen storage container oral area, through steady voltage chamber (23) that pipeline and valve (21) are connected, characterized by: the hydrogen gas injection device is characterized by further comprising a hydrogen gas nozzle (25) connected with the pressure stabilizing cavity (23) through a pipeline, wherein the hydrogen gas nozzle (25) is arranged at the upper end of a closed water tank (26), the upper end of the closed water tank (26) is further provided with a water injection valve (27), a water drain valve (28), a gas release valve (29) and a temperature and pressure acquisition unit (31), and the temperature and pressure acquisition unit (31) is electrically connected with a control system (30).
2. The hydrogen engine nozzle flow measurement device according to claim 1, characterized in that: a pressure limiting valve (22) is arranged in a connecting pipeline of the valve (21) and the pressure stabilizing cavity (23); a pressure regulating valve (24) is arranged in a connecting pipeline of the pressure stabilizing cavity (23) and the hydrogen nozzle (25).
3. The hydrogen engine nozzle flow measurement device according to claim 1 or 2, characterized in that: the closed water tank (26) is U-shaped, and the left side is part A and the right side is part B.
4. A hydrogen engine nozzle flow measurement device according to claim 3, characterized in that: the hydrogen nozzle (25) is arranged at the middle part of the upper end of the A part of the closed water tank (26).
5. The hydrogen engine nozzle flow measurement device according to claim 4, characterized in that: the water injection valve (27) is arranged at the middle left part of the upper end of the B part of the closed water tank (26).
6. The hydrogen engine nozzle flow measurement device according to claim 5, characterized in that: the water drain valve (28) is arranged at the middle right part of the upper end of the B part of the closed water tank (26).
7. The hydrogen engine nozzle flow measurement device according to claim 6, characterized in that: the air release valve (29) is arranged at the middle left part of the upper end of the A part of the closed water tank (26).
8. The hydrogen engine nozzle flow measurement device according to claim 7, characterized in that: the temperature and pressure acquisition unit (31) is arranged at the right part of the middle of the upper end of the A part of the closed water tank (26).
9. The hydrogen engine nozzle flow measurement device of claim 8, wherein: a hydrogen nozzle (25) arranged at the middle part of the upper end of the A part of the closed water tank (26) is electrically connected with the control system (30).
10. A method for measuring the flow of a nozzle of a hydrogen engine is characterized by comprising the following steps: on a hydrogen engine nozzle flow measurement device as claimed in claim 9, comprising the steps of:
firstly, checking the air tightness of a measuring device; before the measurement is started, a water drain valve (28) and a gas release valve (29) are opened; then the water filling valve (27) is opened, and water is filled into the U-shaped closed water tank (26) until water flows out from the water discharging valve (28) and the air discharging valve (29); then, sequentially closing the water filling valve (27), the water discharging valve (28) and the air discharging valve (29);
secondly, spraying hydrogen into the U-shaped closed water tank; firstly, opening a water drain valve (28), then opening a valve (21) of a hydrogen storage container (20), and introducing high-pressure hydrogen into a pipeline; after the hydrogen is subjected to pressure limiting through a pressure limiting valve (3), the pressure is reduced to a pressure range which can be used by a hydrogen nozzle (25), and then the hydrogen enters a pressure stabilizing cavity (23); after passing through the pressure stabilizing cavity (23), the hydrogen after the pressure is reduced is further precisely regulated to the working pressure of the hydrogen nozzle (25) through the pressure regulating valve (24), and then is conveyed to the hydrogen nozzle (25) through a pipeline; after receiving the spraying signal, the hydrogen nozzle (25) starts to spray hydrogen into the U-shaped closed water tank (26); when a certain amount of hydrogen is flushed into the A part of the U-shaped closed water tank (26), water flows out from the A part;
thirdly, starting measurement; after a part of water flows out from the water drain valve (28), the measurement can be formally started after the hydrogen filled in the A part of the U-shaped closed water tank (26) is stabilized;
in the measuring process, the spray nozzle needs to spray three rounds, the spraying times of each round is limited to 10 times, three beakers are used for respectively taking water discharged in the three-round spraying process, and the water is weighed and data are recorded; after the quality of three rounds of water is averaged, dividing the three rounds of water by 10 to obtain the quality of water discharged in the process of one round of injection; the temperature and pressure of the hydrogen in the test process are monitored by a temperature and pressure acquisition unit (31), and the acquired pressure and temperature parameters are acquired, processed and stored by a data acquisition control system (30);
fourth step: collecting residual gas; after the measurement is finished, opening a release valve (29) to release hydrogen generated in the measurement, and collecting the hydrogen through a container;
fifth step: data processing;
the mass Q (g) of the water discharged in the measurement:
the volume of this water was determined by the following formula, which was equal to the volume of hydrogen injected by a single hydrogen nozzle;
Q=ρ*V
wherein:
q-is the mass of water in g;
ρ is the density of water in g/cm3;
v-is the volume of the discharged water, in cm3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000252.3A CN116335818A (en) | 2023-01-02 | 2023-01-02 | Hydrogen engine nozzle flow measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310000252.3A CN116335818A (en) | 2023-01-02 | 2023-01-02 | Hydrogen engine nozzle flow measuring device and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116335818A true CN116335818A (en) | 2023-06-27 |
Family
ID=86886499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310000252.3A Pending CN116335818A (en) | 2023-01-02 | 2023-01-02 | Hydrogen engine nozzle flow measuring device and measuring method |
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