CN114352582A - Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile - Google Patents
Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile Download PDFInfo
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- CN114352582A CN114352582A CN202210018715.4A CN202210018715A CN114352582A CN 114352582 A CN114352582 A CN 114352582A CN 202210018715 A CN202210018715 A CN 202210018715A CN 114352582 A CN114352582 A CN 114352582A
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- 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
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Abstract
The application discloses two ejector systems, two ejector module systems of hydrogen fuel cell, design method, new energy automobile, its design essential lies in, includes: the system comprises a fresh hydrogen spray pipe module, 2 electromagnetic valves and a double-ejector cavity unit; wherein, two ejector cavity units include: the injection device comprises a first injection cavity unit, a second injection cavity unit and an injector diffusion cavity; the first injection cavity unit and the second injection cavity unit are arranged in parallel up and down and are arranged horizontally; first draw and penetrate the cavity unit and include along its length direction in proper order: a first inlet flow chamber, a first mixing chamber; the second draws penetrates the cavity unit and includes along its length direction in proper order: a second inlet flow chamber, a second mixing chamber; the end parts of the first mixing cavity and the second mixing cavity are connected with an ejector diffusion cavity. By adopting the double-ejector system, the hydrogen fuel cell double-ejector module system, the design method and the new energy automobile, the use of the hydrogen fuel cell under all working conditions can be met.
Description
Technical Field
The application relates to the field of new energy automobiles, in particular to a double-ejector system, a hydrogen fuel cell double-ejector module system, a design method and a new energy automobile.
Background
Dual ejectors have been proposed for over 20 years, for example:
US2002022171a1, EP1668735B1 and the like each disclose a dual spray hydrogen eductor system having the basic configuration: 2 variable-joint single ejector systems (essentially, 2 independent single ejectors are used) are designed to meet the requirements of ejection coefficients under different working conditions.
Similar to the solutions described in the two previous documents, CN106784930A provides a dual-injection hydrogen ejector system of a fuel cell automobile power system, which includes a hydrogen injection ejector of a 1-10KW fuel cell system, a hydrogen injection ejector of a 10-60KW fuel cell system, a two-position three-way valve and a detection control system. The double-hydrogen-spraying ejector comprises two sets of hydrogen-spraying electromagnetic valves and primary and secondary ejectors with different sizes, and the power and the number of the electromagnetic valves of a 1-10KW fuel cell system are different from those of a 10-60KW fuel cell system; the double-jet hydrogen injection system is adopted, the aim that the fuel cell power system cannot perform backflow injection when being started instantly is fulfilled, the requirement of the injection system for large-power hydrogen return is met, and the double-jet hydrogen injection system has the advantages of being simple in structure, energy-saving, efficient and low in cost.
DE102019135909a1 also discloses a double-jet hydrogen ejector system, which is different from the aforementioned "parallel ejector", in that it is provided with only 2 nozzles and a single mixing chamber (the mixing chambers of the aforementioned documents US2002022171a1, EP1668735B1 and CN106784930A also use 2 chambers in parallel).
However, the above-described dual-injection ejector system still suffers from 3 problems, which still cannot be directly used on fuel cells:
firstly, how to realize different uses of large and small working conditions on a mechanical structure of the double-jet hydrogen injection system, namely how to organically combine the two variable single injectors together becomes 1 problem.
Secondly, the secondary flow of hydrogen cannot be directly drained: the secondary stream of hydrogen inevitably mixes with water (the fuel cell reactant) and nitrogen, and if directed, affects the life and power of the fuel cell.
Thirdly, the temperature of the injected mixed flow is greatly reduced, and at the moment, the injected mixed flow inevitably separates out moisture (gases with different temperatures have different saturated vapor pressures).
Among the three problems mentioned above:
for the first problem, no better scheme is provided in the prior art, and the first problem is solved by adopting 2 independent single ejectors.
To the second problem, prior art is solved through setting up independent component, causes equipment length very high, integrates the degree low, still can influence simultaneously and draw the penetrating effect.
For the third problem, no relevant documents are reported, namely, the current research does not realize that the injected mixed flow can separate out water, and further the influence on the service life and the power of the fuel cell can be caused.
Disclosure of Invention
An object of the application is to provide a two ejector system to the not enough of above-mentioned prior art.
It is another object of the present application to provide a hydrogen fuel cell dual eductor module system.
It is yet another object of the present application to provide a design method for a hydrogen fuel cell dual eductor module system.
Still another object of the present application is to provide a new energy automobile.
A dual eductor system comprising: the system comprises a fresh hydrogen spray pipe module, 2 electromagnetic valves and a double-ejector cavity unit;
wherein, two ejector cavity units include: the injection device comprises a first injection cavity unit, a second injection cavity unit and an injector diffusion cavity; the first injection cavity unit and the second injection cavity unit are arranged in parallel up and down and are arranged horizontally; first draw and penetrate the cavity unit and include along its length direction in proper order: a first inlet flow chamber, a first mixing chamber; the second draws penetrates the cavity unit and includes along its length direction in proper order: a second inlet flow chamber, a second mixing chamber; the end parts of the first mixing cavity and the second mixing cavity are connected with an ejector diffusion cavity;
wherein the fresh hydrogen lance module comprises: the system comprises a fresh hydrogen spray pipe module body, a first spray pipe, a second spray pipe, a fresh hydrogen vertical pipeline and 2 electromagnetic valve interfaces; the new hydrogen vertical pipeline is arranged inside the new hydrogen spray pipe module body, the first spray pipe and the second spray pipe are arranged on one side wall of the new hydrogen spray pipe module body in a protruding mode, and 2 electromagnetic valve interfaces are arranged on the other side wall of the new hydrogen spray pipe module body;
the first end of the first spray pipe is communicated with a vertically arranged new hydrogen vertical pipeline, and the second end of the first spray pipe is provided with a first nozzle;
the first end part of the second spray pipe is communicated with a vertically arranged new hydrogen vertical pipeline, and the second end part of the second spray pipe is provided with a second nozzle;
the electromagnetic valve interfaces are communicated with a vertically arranged new hydrogen vertical pipeline, and 2 electromagnetic valve interfaces respectively correspond to the first spray pipe and the second spray pipe in height;
the first lance is positioned in a first inlet chamber and the second lance is positioned in a second inlet chamber;
the 2 solenoid valves respectively control the valve core to block/release the first end part of the first spray pipe and block/release the first end part of the second spray pipe.
Furthermore, the new hydrogen vertical pipeline protrudes out of the upper end part of the new hydrogen spray pipe module, and an opening of the new hydrogen vertical pipeline protruding out of the new hydrogen spray pipe module is a new hydrogen inlet.
Further, 2 solenoid valves are installed on the left side of the new hydrogen nozzle module.
Furthermore, 2 solenoid valves, the new hydrogen spray pipe module and the double-ejector cavity unit are connected into a whole by adopting bolt and nut components.
A hydrogen fuel cell dual eductor module system comprising: the first shell module and the second cover body module; the first shell module and the second cover module are connected through a bolt-nut assembly;
wherein the first housing module includes: the foregoing dual eductor system;
wherein, first casing module and second lid module still are formed with: the device comprises a first injection airflow containing cavity, a second injection airflow containing cavity and a third injection airflow containing cavity; the mixed airflow first accommodating cavity, the mixed airflow second accommodating cavity and the mixed airflow third accommodating cavity;
the axial direction of the first spray pipe is defined as X direction, and the direction from the first spray pipe to the first mixing cavity is defined as X direction positive direction;
defining the axial direction of the new hydrogen vertical pipeline as Y direction, and defining the direction of the first injection cavity unit pointing to the second injection cavity unit as Y direction forward direction;
defining the direction of the first shell module pointing to the second cover module as Z-direction forward direction;
the X direction, the Y direction and the Z direction are mutually vertical;
the mixed airflow third accommodating cavity is arranged in the X-direction forward direction of the ejection airflow third accommodating cavity, and the mixed airflow third accommodating cavity and the ejection airflow third accommodating cavity are arranged in the Z-direction forward direction of the double-ejector cavity unit together;
the mixed airflow first accommodating cavity is arranged in the X-direction positive direction of the injection airflow first accommodating cavity, and the mixed airflow second accommodating cavity is arranged in the X-direction positive direction of the injection airflow second accommodating cavity;
the ejection airflow second accommodating cavity is arranged in the Z-direction forward direction of the ejection airflow first accommodating cavity, and a first filter is arranged between the ejection airflow first accommodating cavity and the ejection airflow second accommodating cavity;
the mixed airflow second accommodating cavity is arranged in the Z-direction forward direction of the mixed airflow first accommodating cavity, and a first filter is arranged between the mixed airflow first accommodating cavity and the mixed airflow second accommodating cavity;
the component formed by the ejection airflow first containing cavity, the ejection airflow second containing cavity, the mixed airflow first containing cavity and the mixed airflow second containing cavity is arranged in the Y-direction forward direction of the component formed by the mixed airflow third containing cavity, the ejection airflow third containing cavity and the double-ejector system;
the first containing cavity of the injection airflow is provided with a horizontal injection hydrogen flow inlet pipeline, the injection hydrogen flow inlet pipeline protrudes out of the left end part of the injection gas filtering unit, and an opening of the injection hydrogen flow inlet pipeline protruding out of the left end part of the injection gas filtering unit is an injection hydrogen flow inlet; the injection hydrogen flow inlet pipeline is communicated with an injection airflow first accommodating cavity, the injection airflow first accommodating cavity is communicated with an injection airflow second accommodating cavity, and the injection airflow second accommodating cavity is communicated with an injection airflow third accommodating cavity; the third containing cavity for the injection airflow is communicated with a first inlet flow cavity of the first injection cavity unit and a second inlet flow cavity of the second injection cavity unit respectively.
The mixed gas flow outlet pipeline protrudes out of the right end part of the mixed gas flow first accommodating cavity, and an opening of the mixed gas flow outlet pipeline protruding out of the right end part of the mixed gas flow first accommodating cavity is a mixed gas outlet;
the ejector diffusion cavity and the mixed airflow third containing cavity are communicated in the Z direction, the mixed airflow third containing cavity and the mixed airflow second containing cavity are communicated, and the mixed airflow second containing cavity and the mixed airflow first containing cavity are communicated.
Further, still include: a one-way valve; a one-way valve is arranged on a pipeline for communicating the third containing cavity for injecting airflow with the first introducing flow cavity of the first injection cavity unit; and a one-way valve is arranged on a pipeline for communicating the third containing cavity for injecting airflow with the second introducing flow cavity of the second injection cavity unit.
Further, a first filter is arranged between the first containing cavity for injecting airflow and the second containing cavity for injecting airflow; and a second filter is arranged between the mixed gas flow second accommodating cavity and the mixed gas flow first accommodating cavity.
Furthermore, a first pressure sensor is further installed at the end part of the first containing cavity for injecting the airflow so as to monitor the air pressure of the first containing cavity for injecting the airflow;
and a second pressure sensor is also arranged at the end part of the mixed gas flow first accommodating cavity so as to monitor the gas pressure of the mixed gas flow first accommodating cavity.
Furthermore, a nitrogen removal valve is further installed on the mixed airflow first accommodating cavity and/or the injection airflow first accommodating cavity.
The application has the advantages that:
(1) the application provides a double-ejector system, a hydrogen fuel cell double-ejector module system, a design method and a new energy automobile; the double-ejector scheme can be adapted to any working condition, can be matched with different fuel cell working conditions, and can meet the working condition of a 0-150kw fuel cell stack.
(2) The utility model provides a two ejector module systems of hydrogen fuel cell can satisfy the two ejector system structures of hydrogen fuel cell full operating mode, and it can be better replaces traditional hydrogen circulating pump, and the essential element has: the device comprises a first injection airflow containing cavity, a second injection airflow containing cavity and a third injection airflow containing cavity; the mixed airflow first accommodating cavity, the mixed airflow second accommodating cavity and the mixed airflow third accommodating cavity; a dual ejector system. The hydrogen fuel cell double-ejector module system greatly reduces the cost of the hydrogen fuel cell system, and improves the efficiency of the fuel cell because a hydrogen circulating pump is not used.
(3) The technical scheme of the application solves three problems in the background art: to address the first problem, the present application is directed to a dual eductor system comprising: the system comprises a fresh hydrogen spray pipe module, 2 electromagnetic valves and a double-ejector cavity unit; the method is characterized in that 3 modules are installed together through a bolt-nut assembly to form 1 double-ejector system, which is different from 2 independent single ejectors and is communicated with new hydrogen inlet and ejector inlet.
For the second problem and the third problem, the integrated design is adopted, and a first containing cavity for injecting airflow, a second containing cavity for injecting airflow and a third containing cavity for injecting airflow are adopted; the mixed gas flow is first to hold the chamber, the mixed gas flow second holds the chamber, the mixed gas flow third holds the chamber, then has cooperated first filter, second filter and denitrogenation valve, the influence of solution moisture and nitrogen gas that can be better.
(4) The application provides a design method: the sizes of the first filter and the second filter are that when the incident pressure of new hydrogen is 15bar, the flow rate of the injected flow passing through the first filter and the flow rate of the mixed flow passing through the second filter are 1.5 m/s-2.3 m/s.
Drawings
The present application will be described in further detail with reference to the following examples, which are not intended to limit the scope of the present application.
Fig. 1 is a three-dimensional, exploded schematic view of a hydrogen fuel cell dual eductor module system of example 1.
Fig. 2 is a schematic three-dimensional design of the first housing module, the new hydrogen lance module, and the solenoid valve of example 1.
Fig. 3 is a rear view of the first housing module of embodiment 1.
Fig. 4 is a side view of the first housing module of embodiment 1.
Fig. 5 is a sectional view a-a of fig. 4.
Fig. 6 is a B-B sectional view of fig. 3.
Fig. 7 is a cross-sectional view C-C of fig. 3.
Fig. 8 is a front view of the new hydrogen lance module 3.
Fig. 9 is an elevation view of a hydrogen fuel cell dual eductor module system without a second cover module.
Fig. 10 is a graph comparing the effect of filtration under different filters.
The reference numerals are explained below:
the device comprises a first shell module 1, a second cover body module 2, a new hydrogen spray pipe module 3 and an electromagnetic valve 4;
the double-ejector cavity unit 100, the first ejection airflow containing cavity 200, the second ejection airflow containing cavity 300 and the third ejection airflow containing cavity 400; a mixed airflow first accommodating chamber 500, a mixed airflow second accommodating chamber 600, and a mixed airflow third accommodating chamber 700;
the Z-direction communication port 104 of the first injection cavity unit 101, the second injection cavity unit 102, the ejector diffusion cavity 103 and the mixed airflow third accommodating cavity 700;
a Z-direction communication port 105 through which the third accommodation chamber 400 for ejection airflow communicates with the first introduction flow chamber of the first ejection chamber unit 101 and the second introduction flow chamber of the second ejection chamber unit 102;
the device comprises a first spray pipe 3-1, a second spray pipe 3-2 and a new hydrogen vertical pipeline 3-3;
a hydrogen gas flow inlet pipeline 201 and a first pressure sensor 202 are injected;
a mixed gas outflow line 501 and a second pressure sensor 502;
a first filter 801, a second filter 802;
a one-way valve 900.
Detailed Description
the first shell module 1 and the second cover module 2 are connected through a bolt-nut assembly;
wherein the first housing module 1 comprises: a dual eductor housing unit 100;
wherein, first casing module 1 and second lid module 2 are formed with: the first containing cavity 200 for injecting airflow, the second containing cavity 300 for injecting airflow and the third containing cavity 400 for injecting airflow; a mixed airflow first accommodating chamber 500, a mixed airflow second accommodating chamber 600, and a mixed airflow third accommodating chamber 700;
wherein, two ejector cavity units 100 include: the injection device comprises a first injection cavity unit 101, a second injection cavity unit 102 and an injector diffusion cavity 103; the first injection cavity unit 101 and the second injection cavity unit 102 are arranged in parallel up and down and are arranged horizontally;
the new hydrogen lance module 3 comprises: the device comprises a fresh hydrogen spray pipe module body, a first spray pipe 3-1, a second spray pipe 3-2, a fresh hydrogen vertical pipeline 3-3 and 2 electromagnetic valve interfaces;
the new hydrogen vertical pipeline 3-3 is arranged inside the new hydrogen spray pipe module body, the first spray pipe 3-1 and the second spray pipe 3-2 are arranged on one side wall of the new hydrogen spray pipe module body in a protruding mode, and 2 electromagnetic valve interfaces are arranged on the other side wall of the new hydrogen spray pipe module body;
the new hydrogen vertical pipeline 3-3 protrudes out of the upper end part of the new hydrogen spray pipe module 3, and an opening of the new hydrogen vertical pipeline 3-3 protruding out of the new hydrogen spray pipe module 3 is a new hydrogen inlet;
the first end part of the first spray pipe 3-1 is communicated with a new hydrogen vertical pipeline 3-3 which is vertically arranged, and the second end part of the first spray pipe is provided with a first nozzle;
the first end part of the second spray pipe 3-2 is communicated with a new hydrogen vertical pipeline 3-3 which is vertically arranged, and the second end part of the second spray pipe is provided with a second nozzle;
the electromagnetic valve interfaces are communicated with a new hydrogen vertical pipeline 3-3 which is vertically arranged, and 2 electromagnetic valve interfaces respectively correspond to the first spray pipe 3-1 and the second spray pipe 3-2 in height;
first draw and penetrate cavity unit 101 along X to the forward, include in proper order: a first inlet flow chamber, a first mixing chamber;
the second injection cavity unit 102 sequentially includes, along the X direction, in the forward direction: a second inlet flow chamber, a second mixing chamber;
the X-direction positive directions of the first mixing cavity and the second mixing cavity are both connected with the ejector diffusion cavity 103;
the first lance is positioned in a first inlet chamber and the second lance is positioned in a second inlet chamber;
the double-ejector cavity unit 100, the new hydrogen nozzle module 3 and the electromagnetic valve 4 jointly form a double-ejector system;
2 electromagnetic valves 4 are arranged on the left side of the new hydrogen spray pipe module 3;
2 electromagnetic valves 4, a new hydrogen nozzle module 3 and a double ejector cavity unit 100 are connected into a whole by adopting bolt and nut components;
the 2 solenoid valves 4 respectively control the valve core to block/loosen the first end of the first spray pipe and the first end of the second spray pipe (namely, the valve core of the solenoid valve penetrates through the new hydrogen spray pipe module body to block the first end of the first spray pipe and the first end of the second spray pipe, namely, the valve core of the solenoid valve is horizontally moved to control whether the first spray pipe and the second spray pipe spray new hydrogen), namely, the 2 solenoid valves 4 are used for controlling whether the first containing cavity 200 of the injection airflow and the second containing cavity 300 of the injection airflow are in an injection state.
The axial direction of the first spray pipe is defined as X direction, and the direction from the first spray pipe to the first mixing cavity is defined as X direction positive direction;
defining the axial direction of the new hydrogen vertical pipeline 3-3 as Y direction, and defining the direction of the first injection cavity unit 101 pointing to the second injection cavity unit 102 as Y direction forward direction;
defining the direction of the first shell module 1 pointing to the second cover module 2 as Z-direction forward direction;
the X direction, the Y direction and the Z direction are mutually vertical.
The mixed airflow third accommodating cavity 700 is arranged in the X-direction forward direction of the ejection airflow third accommodating cavity 400, and the mixed airflow third accommodating cavity 700 and the ejection airflow third accommodating cavity 400 are arranged in the Z-direction forward direction of the double-ejector cavity unit 100 together;
the mixed airflow first accommodating cavity 500 is arranged in the X-direction positive direction of the ejection airflow first accommodating cavity 200, and the mixed airflow second accommodating cavity 600 is arranged in the X-direction positive direction of the ejection airflow second accommodating cavity 300;
the injection airflow second accommodating cavity 300 is arranged in the Z-direction forward direction of the injection airflow first accommodating cavity 200, and a first filter 801 is arranged between the injection airflow first accommodating cavity 200 and the injection airflow second accommodating cavity 300;
the mixed gas flow second accommodating chamber 600 is arranged in the Z-direction forward direction of the mixed gas flow first accommodating chamber 500, and a second filter 802 is arranged between the mixed gas flow first accommodating chamber 500 and the mixed gas flow second accommodating chamber 600;
the component jointly formed by the first containing cavity 200 for the injection airflow, the second containing cavity 300 for the injection airflow, the first containing cavity 500 for the mixed airflow and the second containing cavity 600 for the mixed airflow is arranged in the Y-direction forward direction of the component jointly formed by the third containing cavity 700 for the mixed airflow, the third containing cavity 400 for the injection airflow and the double-injector cavity unit 100.
The first injection airflow containing cavity 200 is provided with a horizontal injection hydrogen flow inlet pipeline 201, the injection hydrogen flow inlet pipeline 201 protrudes out of the left end part of the injection airflow filtering unit 200, and an opening of the injection hydrogen flow inlet pipeline 201 protruding out of the left end part of the injection airflow filtering unit 200 is an injection hydrogen flow inlet; the injection hydrogen flow inlet pipeline 201 is communicated with an injection airflow first containing cavity 200, the injection airflow first containing cavity 200 is communicated with an injection airflow second containing cavity 300 (a first filter 801 is arranged between the injection airflow first containing cavity 200 and the injection airflow second containing cavity 300), and the injection airflow second containing cavity 300 is communicated with an injection airflow third containing cavity 400; the third containing cavity 400 for the injection airflow is respectively communicated with the first inlet flow cavity of the first injection cavity unit 101 and the second inlet flow cavity of the second injection cavity unit 102.
Further, still include: a one-way valve 900;
a check valve 900 is arranged on a pipeline (Z direction) for communicating the third injection airflow containing cavity 400 with the first introduction flow cavity of the first injection cavity unit 101;
a check valve 900 is arranged on a pipeline (Z direction) for communicating the third injection airflow accommodating cavity 400 with the second introduction flow cavity of the second injection cavity unit 102;
the check valve 900 is provided to prevent fresh hydrogen from entering the third accommodation chamber 400 for the injection airflow.
The mixed gas flow first accommodating cavity 500 is provided with a horizontal mixed gas outflow pipeline 501, the mixed gas outflow pipeline 501 protrudes out of the right end part of the mixed gas flow first accommodating cavity 500, and an opening of the mixed gas outflow pipeline 501 protruding out of the right end part of the mixed gas flow first accommodating cavity 500 is a mixed gas outflow port;
the ejector diffusion cavity 103 is communicated with a mixed airflow third accommodating cavity 700 (in the Z direction), the mixed airflow third accommodating cavity 700 is communicated with a mixed airflow second accommodating cavity 600, and the mixed airflow second accommodating cavity 600 is communicated with a mixed airflow first accommodating cavity 500 (a second filter 802 is arranged between the two).
Further, a first pressure sensor 202 is further installed at the end of the first accommodating cavity 200 for injecting airflow to monitor the air pressure of the first accommodating cavity 200 for injecting airflow.
Similarly, a second pressure sensor 502 is further installed at the end of the mixed gas flow first receiving chamber 500 to monitor the gas pressure of the mixed gas flow first receiving chamber 500.
Furthermore, the first nozzle of the first spray pipe and the second nozzle of the second spray pipe are different in size and respectively correspond to injection requirements under different working conditions.
Further, the first nozzle is applied to the condition under a small working condition (namely, small power); the second lance is used in the case of large operating conditions (i.e. high power) (the cross-sectional area of the first nozzle of the first lance is smaller than the cross-sectional area of the second nozzle of the second lance).
The working principle of the hydrogen fuel cell double-ejector module system is as follows:
when high-pressure hydrogen is sprayed into the double-ejector system from the fresh hydrogen vertical pipeline 3-3 of the fresh hydrogen spray pipe module 3, different nozzles are selected by adjusting the two electromagnetic valves 4 to meet different working conditions:
when small working conditions are met:
the first spray pipe is communicated, and the second spray pipe is closed by the electromagnetic valve; high-pressure hydrogen is sprayed into the first injection cavity unit 101 from the first spray pipe, at the moment, the guided hydrogen enters the first injection airflow containing cavity 200 from the injection hydrogen flow inlet pipeline 201, then passes through the first filter 801 (filtering moisture and nitrogen), then enters the second injection airflow containing cavity 300 along the Z-direction positive direction, then rises to enter the third containing cavity 400, finally enters the first injection cavity unit 101 through the one-way valve, after being mixed with the secondary guided hydrogen through the first mixing cavity of the first injection cavity unit 101, enters the injector diffusion cavity 103, then enters the mixed airflow third containing cavity 700 through the Z-direction communication port 104 of the injector diffusion cavity 103 and the mixed airflow third containing cavity 700, then the mixed airflow downwards enters the mixed airflow second containing cavity 600, and then reversely passes through the second filter 802 along the Z direction (water removal, nitrogen removal, water removal, and nitrogen removal), Nitrogen gas removal) into the mixed gas flow first accommodating chamber 500 and finally flows into the fuel cell stack from the mixed gas outflow pipe 501;
when large working conditions are met:
the second spray pipe is communicated, and the first spray pipe is closed by the electromagnetic valve; high-pressure hydrogen is sprayed into the second injection cavity unit 102 from the second nozzle, at this time, the guided hydrogen enters the first injection airflow containing cavity 200 from the injection hydrogen flow inlet pipeline 201, then passes through the first filter 801 (filtering moisture and nitrogen), then enters the second injection airflow containing cavity 300 along the Z-direction positive direction, then rises to enter the third containing cavity 400, finally enters the second injection cavity unit 102 through the one-way valve, after being mixed with the secondary guided hydrogen through the second mixing cavity of the second injection cavity unit 102, enters the injector diffusion cavity 103, then enters the mixed airflow third containing cavity 700 through the Z-direction communication port 104 of the injector diffusion cavity 103 and the mixed airflow third containing cavity 700, then the mixed airflow downwards enters the mixed airflow second containing cavity 600, and then reversely passes through the second filter 802 along the Z direction (water removal, nitrogen removal, water removal, and nitrogen removal), Nitrogen removed) into the mixed gas flow first receiving chamber 500 and finally flows from the mixed gas outflow line 501 to the fuel cell stack.
It should be noted that: the first nozzle and the second nozzle are different in size and correspond to the application of the small working condition and the large working condition of the fuel cell respectively.
It should be noted that: a nitrogen removal valve (for discharging nitrogen gas of the incoming flow and the mixed flow) is further installed on the mixed gas flow first accommodating chamber 500 and/or the injection gas flow first accommodating chamber 200.
The key design of example 1 is: the dehumidification design of the ejection air flow and the mixed air flow.
A first filter 801 is arranged between the first injection airflow containing cavity 200 and the second injection airflow containing cavity 300. The induced airflow enters the first accommodation chamber 200, turns 90 °, and passes through the first filter 801 to be dehumidified.
The source and the differentiation of the moisture are as follows:
after the fuel cell stack is combusted, the humidity of the injection airflow is necessarily 100%, and the temperature of the injection airflow is necessarily reduced when the injection airflow flows from the fuel cell stack to the injection hydrogen flow inlet pipeline 201, so that the moisture in the injection airflow is released. This moisture is of no benefit if it enters the fuel cell stack.
How to remove the moisture is a key design of the application.
The above design relies on:
1) the structure design is that the injection airflow enters the first containing cavity 200 of the injection airflow, then turns to 90 degrees and passes through the first filter 801 for dehumidification.
2) Relevant tests were performed for water removal effect.
The pressure of the incident fresh hydrogen is 15bar, the incident flux is 3.5g/s (g/s), and the incident temperature is 25 degrees;
the inlet of the hydrogen injection flow inlet pipeline 201 is set to be a circular pipe with the diameter of 20 mm;
the temperature of the bleed stream incident on the hydrogen gas inlet line 201 was recorded at 55-60 deg..
Respectively compare: the area of the first filter 801 is: 80X 80mm (test 1), 100X 120mm (test 2), 125X 150mm (test 3), 150X 150mm (test 4), 180X 180mm (test 4);
the results are shown in FIG. 10: and measuring the obtained moisture flowing out of the first containing cavity of the injection airflow in a certain time. When the area of the first filter 801 is too small, the filtering effect is not good, and a large amount of moisture passes directly through the first filter 801. If the area of the first filter 801 is too large, the effect also has a bottleneck period; also, space in the automobile is limited, and for parts, the smaller the volume the better. In view of the above results, it is preferable to use the first filter 801 having an area of 100X 120mm to 150X 150 mm.
In view of the above problem, the first filter 801 has an area related to the diameter of the circular pipe provided at the inlet of the hydrogen gas inlet line 201, and therefore, the recognition thereof needs to be further advanced.
The applicant studied the data of several sets of tests, and has more profound understanding that: the flow velocity of the injection flow/mixed flow passing through the first filter 801 is 1.5 m/s-2.3 m/s, so that a better dehumidification effect can be achieved. That is, in the experiment of fig. 10, the filtering effect was not limited to a certain region because the area of the filter was small; but because the filter area is large, the flow velocity of the air flow is reduced, and the filtering effect is changed.
The above-mentioned embodiments are merely preferred embodiments of the present application, which are not intended to limit the present application in any way, and it will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present application.
Claims (10)
1. A dual eductor system, comprising: the system comprises a fresh hydrogen spray pipe module, 2 electromagnetic valves and a double-ejector cavity unit;
wherein, two ejector cavity units include: the injection device comprises a first injection cavity unit, a second injection cavity unit and an injector diffusion cavity; the first injection cavity unit and the second injection cavity unit are arranged in parallel up and down and are arranged horizontally; first draw and penetrate the cavity unit and include along its length direction in proper order: a first inlet flow chamber, a first mixing chamber; the second draws penetrates the cavity unit and includes along its length direction in proper order: a second inlet flow chamber, a second mixing chamber; the end parts of the first mixing cavity and the second mixing cavity are connected with an ejector diffusion cavity;
wherein the fresh hydrogen lance module comprises: the system comprises a fresh hydrogen spray pipe module body, a first spray pipe, a second spray pipe, a fresh hydrogen vertical pipeline and 2 electromagnetic valve interfaces; the new hydrogen vertical pipeline is arranged inside the new hydrogen spray pipe module body, the first spray pipe and the second spray pipe are arranged on one side wall of the new hydrogen spray pipe module body in a protruding mode, and 2 electromagnetic valve interfaces are arranged on the other side wall of the new hydrogen spray pipe module body;
the first end of the first spray pipe is communicated with a vertically arranged new hydrogen vertical pipeline, and the second end of the first spray pipe is provided with a first nozzle;
the first end part of the second spray pipe is communicated with a vertically arranged new hydrogen vertical pipeline, and the second end part of the second spray pipe is provided with a second nozzle;
the electromagnetic valve interfaces are communicated with a vertically arranged new hydrogen vertical pipeline, and 2 electromagnetic valve interfaces respectively correspond to the first spray pipe and the second spray pipe in height;
the first lance is positioned in a first inlet chamber and the second lance is positioned in a second inlet chamber;
the 2 solenoid valves respectively control the valve core to block/release the first end part of the first spray pipe and block/release the first end part of the second spray pipe.
2. The dual eductor system of claim 1 wherein the fresh hydrogen vertical line protrudes from the upper end of the fresh hydrogen lance module and the opening of the fresh hydrogen vertical line protruding from the fresh hydrogen lance module is the fresh hydrogen inlet.
3. The dual eductor system of claim 1 wherein 2 solenoid valves, the new hydrogen lance module, and the dual eductor cavity unit are connected together by bolt and nut assemblies.
4. A hydrogen fuel cell dual eductor module system, comprising: the first shell module and the second cover body module; the first shell module and the second cover module are connected through a bolt-nut assembly;
wherein the first housing module includes: a dual eductor system of any one of claims 1 to 3;
wherein, first casing module and second lid module still are formed with: the device comprises a first injection airflow containing cavity, a second injection airflow containing cavity and a third injection airflow containing cavity; the mixed airflow first accommodating cavity, the mixed airflow second accommodating cavity and the mixed airflow third accommodating cavity;
the axial direction of the first spray pipe is defined as X direction, and the direction from the first spray pipe to the first mixing cavity is defined as X direction positive direction;
defining the axial direction of the new hydrogen vertical pipeline as Y direction, and defining the direction of the first injection cavity unit pointing to the second injection cavity unit as Y direction forward direction;
defining the direction of the first shell module pointing to the second cover module as Z-direction forward direction;
the X direction, the Y direction and the Z direction are mutually vertical;
the mixed airflow third accommodating cavity is arranged in the X-direction forward direction of the ejection airflow third accommodating cavity, and the mixed airflow third accommodating cavity and the ejection airflow third accommodating cavity are arranged in the Z-direction forward direction of the double-ejector cavity unit together;
the mixed airflow first accommodating cavity is arranged in the X-direction positive direction of the injection airflow first accommodating cavity, and the mixed airflow second accommodating cavity is arranged in the X-direction positive direction of the injection airflow second accommodating cavity;
the ejection airflow second accommodating cavity is arranged in the Z-direction forward direction of the ejection airflow first accommodating cavity, and a first filter is arranged between the ejection airflow first accommodating cavity and the ejection airflow second accommodating cavity;
the mixed airflow second accommodating cavity is arranged in the Z-direction forward direction of the mixed airflow first accommodating cavity, and a first filter is arranged between the mixed airflow first accommodating cavity and the mixed airflow second accommodating cavity;
the component formed by the ejection airflow first containing cavity, the ejection airflow second containing cavity, the mixed airflow first containing cavity and the mixed airflow second containing cavity is arranged in the Y-direction forward direction of the component formed by the mixed airflow third containing cavity, the ejection airflow third containing cavity and the double-ejector system;
the first containing cavity of the injection airflow is provided with a horizontal injection hydrogen flow inlet pipeline, the injection hydrogen flow inlet pipeline protrudes out of the left end part of the injection gas filtering unit, and an opening of the injection hydrogen flow inlet pipeline protruding out of the left end part of the injection gas filtering unit is an injection hydrogen flow inlet; the injection hydrogen flow inlet pipeline is communicated with an injection airflow first accommodating cavity, the injection airflow first accommodating cavity is communicated with an injection airflow second accommodating cavity, and the injection airflow second accommodating cavity is communicated with an injection airflow third accommodating cavity; the third containing cavity for the injection airflow is respectively communicated with a first inlet flow cavity of the first injection cavity unit and a second inlet flow cavity of the second injection cavity unit;
the mixed gas flow outlet pipeline protrudes out of the right end part of the mixed gas flow first accommodating cavity, and an opening of the mixed gas flow outlet pipeline protruding out of the right end part of the mixed gas flow first accommodating cavity is a mixed gas outlet;
the ejector diffusion cavity and the mixed airflow third containing cavity are communicated in the Z direction, the mixed airflow third containing cavity and the mixed airflow second containing cavity are communicated, and the mixed airflow second containing cavity and the mixed airflow first containing cavity are communicated.
5. The hydrogen fuel cell dual eductor module system of claim 4 further comprising: a one-way valve; a one-way valve is arranged on a pipeline for communicating the third containing cavity for injecting airflow with the first introducing flow cavity of the first injection cavity unit; and a one-way valve is arranged on a pipeline for communicating the third containing cavity for injecting airflow with the second introducing flow cavity of the second injection cavity unit.
6. The dual ejector module system of a hydrogen fuel cell according to claim 4, wherein a first filter is arranged between the first containing cavity for ejecting airflow and the second containing cavity for ejecting airflow; and a second filter is arranged between the mixed gas flow second accommodating cavity and the mixed gas flow first accommodating cavity.
7. The dual ejector module system of claim 4, wherein a first pressure sensor is further installed at the end of the first accommodation chamber for the ejector airflow to monitor the air pressure of the first accommodation chamber for the ejector airflow;
and a second pressure sensor is also arranged at the end part of the mixed gas flow first accommodating cavity so as to monitor the gas pressure of the mixed gas flow first accommodating cavity.
8. The dual ejector module system of claim 4, wherein a nitrogen removal valve is further installed on the mixed gas flow first accommodating cavity and/or the ejector gas flow first accommodating cavity.
9. A design method of a hydrogen fuel cell dual ejector module system is provided, wherein the hydrogen fuel cell dual ejector module system is the hydrogen fuel cell dual ejector module system according to claim 6;
the filter is characterized in that the sizes of the openings of the first filter and the second filter meet the following requirements: when the pressure of the new hydrogen incidence is 15bar, the flow rate of the injection flow passing through the first filter and the flow rate of the mixed flow passing through the second filter are 1.5 m/s-2.3 m/s.
10. A new energy automobile, characterized in that the new energy automobile uses a hydrogen fuel cell dual-ejector module system as claimed in any one of claims 4 to 8.
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|---|---|---|---|
| CN202210018715.4A CN114352582B (en) | 2022-01-09 | 2022-01-09 | Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile |
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|---|---|---|---|
| CN202210018715.4A CN114352582B (en) | 2022-01-09 | 2022-01-09 | Double-ejector system, hydrogen fuel cell double-ejector module system, design method and new energy automobile |
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| CN114352582B CN114352582B (en) | 2022-11-22 |
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| CN114352582B (en) | 2022-11-22 |
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