CN114171757A - Gas-liquid separator and fuel cell system - Google Patents
Gas-liquid separator and fuel cell system Download PDFInfo
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- CN114171757A CN114171757A CN202111444306.2A CN202111444306A CN114171757A CN 114171757 A CN114171757 A CN 114171757A CN 202111444306 A CN202111444306 A CN 202111444306A CN 114171757 A CN114171757 A CN 114171757A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04164—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal by condensers, gas-liquid separators or filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04776—Pressure; Flow at auxiliary devices, e.g. reformer, compressor, burner
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a gas-liquid separator and a fuel cell system, and belongs to the technical field of fuel cells. The gas-liquid separator comprises a shell, wherein the shell comprises a separation cavity, and a mixed gas inlet, an exhaust port and a water outlet which are respectively communicated with the separation cavity; the auxiliary flow passage is positioned above the water storage section, one end of the auxiliary flow passage is simultaneously connected with the first flow guide section and the separation cavity, and the other end of the auxiliary flow passage is simultaneously connected with the second flow guide section and the water outlet. Even if water accumulated in the water storage section is frozen in a low-temperature environment, the water outlet cannot be blocked, newly separated water can flow to the water outlet from the auxiliary flow channel, and the problem that the gas-liquid separator cannot work due to the fact that the gas-liquid separator is easily blocked in the low-temperature environment is solved.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a gas-liquid separator and a fuel cell system.
Background
After a fuel cell system is shut down, a certain amount of liquid water and high-temperature wet gas exist in a galvanic pile and a pipeline thereof, condensed water in the gas is separated out and gradually gathers in the pipeline to flow to the lowest point of the system along with the reduction of the temperature and the extension of the static time of the system, and the current mainstream scheme is to arrange a gas-liquid separator at the lowest point of the system so that the liquid water finally flows to the gas-liquid separator, and carry out gas-water separation on a gas-liquid mixture by using the gas-liquid separator, thereby improving the utilization rate of fuel gas.
In the existing fuel cell system, as shown in fig. 1, a water storage area 1 'of a gas-liquid separator is disposed below a separation chamber 2', a gas-liquid mixture enters the gas-liquid separator through a mixed gas inlet 5 ', a temperature sensor 3' and a pressure sensor 4 'are both horizontally disposed and are respectively used for monitoring the gas temperature and the gas pressure of the separation chamber 2', the separated gas is discharged through an exhaust port 6 ', the separated water is discharged through a water outlet 7', a drain solenoid valve 8 'for controlling the opening and closing of the water outlet 7' is disposed at the lowest position of the gas-liquid separator, the separated liquid water descends to the water storage area 1 'along the inner wall of the separator, and the water storage area 1' is a cavity structure extending in the vertical direction. Moreover, most of the pressure sensors 4' in the existing gas-liquid separator are arranged in a transverse mode, so that liquid water easily enters a sensor cavity or a spring diaphragm, and the detection accuracy of the sensors is reduced or the sensors are directly damaged. In addition, the separated liquid water and the separated gas are not obviously isolated, as shown in fig. 2, in the operation process of the gas-liquid separator, an air flow entrainment phenomenon exists, a large amount of liquid water is entrained into the gas again after separation, and the separation efficiency is reduced.
Disclosure of Invention
The invention aims to provide a gas-liquid separator and a fuel cell system, which can avoid the problem of blockage of the gas-liquid separator due to the fact that accumulated water in the gas-liquid separator is frozen in a low-temperature environment.
In order to realize the purpose, the following technical scheme is provided:
in one aspect, a gas-liquid separator is provided, which comprises a housing, the housing comprises a separation cavity and a mixed gas inlet, an exhaust port and a water outlet which are communicated with the separation cavity respectively, and the housing further comprises:
the water storage cavity is positioned below the separation cavity and comprises a water storage section, a first flow guide section and a second flow guide section, the water storage section is positioned below the water outlet, two ends of the first flow guide section are respectively connected with the separation cavity and the water storage section, and two ends of the second flow guide section are respectively connected with the water storage section and the water outlet;
and the auxiliary flow passage is positioned above the water storage section, one end of the auxiliary flow passage is simultaneously connected with the first flow guide section and the separation cavity, and the other end of the auxiliary flow passage is simultaneously connected with the second flow guide section and the water outlet.
As an alternative to the gas-liquid separator, the cross-sectional area of the first flow guide section gradually decreases along the water flow direction.
As an alternative of the gas-liquid separator, the cross-sectional area of the connection part of the first diversion section and the water storage section is equal to that of the water storage section.
As an alternative of the gas-liquid separator, the inner wall of one side, close to the first diversion section, of the first diversion section is obliquely arranged, and the inner wall of one side, far away from the second diversion section, of the first diversion section is vertically arranged.
As an alternative of the gas-liquid separator, the gas-liquid separator further comprises a partition plate arranged between the separation cavity and the water storage cavity, the partition plate is provided with a plurality of runner holes, and the separation cavity is communicated with the water storage cavity through the runner holes.
As an alternative to the gas-liquid separator, the water storage chamber is U-shaped.
As an alternative to the gas-liquid separator, the cross-sectional area of the auxiliary flow passage is smaller than the cross-sectional area of the water storage section.
As an alternative of the gas-liquid separator, a pressure detecting member for detecting the gas pressure in the separation chamber is further included, and a center line of the pressure detecting member is arranged in parallel with a center line of the separation chamber.
In another aspect, there is provided a fuel cell system including the gas-liquid separator as described in any one of the above.
As an alternative to the fuel cell system, the volume of the water storage section (152) of the water storage cavity (15) is V1Then, then
NMixingIs the maximum total molar amount of anode gas at shutdown of the fuel cell system;
pvs is the maximum saturated vapor pressure of the fuel cell system anode water vapor;
p is the maximum total gas pressure of the anode of the fuel cell system;
Mwater (W)Is the molar mass of water;
ρwater (W)Is the density of water.
As an alternative to a fuel cell system, the maximum total molar amount of anode gas at shutdown of the fuel cell system
P is the maximum total gas pressure of the anode of the fuel cell system;
v is the volume of the anode cavity of the fuel cell system;
r is a constant;
and T is the highest operation temperature of the fuel cell system stack.
As an alternative to fuel cell systems, the maximum saturated vapor pressure of anode water vapor of the fuel cell system
a. b, c, d, f and g are constants;
e is a natural base number;
and T is the highest operation temperature of the fuel cell system stack.
Compared with the prior art, the invention has the beneficial effects that:
the gas-liquid separator and the fuel cell system are equivalent to that a water storage cavity and an auxiliary runner are arranged between a separation cavity and a water outlet in parallel, a water storage section of the water storage cavity is arranged below the water outlet, and the auxiliary runner is arranged above the water storage section, so that even if a certain amount of water is accumulated in the water storage section and the part of water is frozen in a low-temperature environment, the water outlet cannot be blocked, newly separated water can also flow to the water outlet from the auxiliary runner, and the problem that the gas-liquid separator cannot work due to easy blockage in the low-temperature environment is solved.
Drawings
FIG. 1 is a schematic view of a gas-liquid separator according to the prior art;
FIG. 2 is a schematic diagram of a gas-liquid separator according to the prior art showing the phenomenon of entrainment of gas flow;
FIG. 3 is a schematic view showing the flow direction of the gas and water in the gas-liquid separator according to the embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a gas-liquid separator in the embodiment of the present invention;
FIG. 5 is a schematic structural view of a water storage chamber according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a partition board according to an embodiment of the present invention.
Reference numerals:
1', a water storage area; 2', a separation cavity; 3', a temperature sensor; 4', a pressure sensor; 5', a mixed gas inlet; 6', an exhaust port; 7', a water outlet; 8', a water discharge electromagnetic valve;
1. a housing; 11. a separation chamber; 12. a mixed gas inlet; 13. an exhaust port; 14. a water outlet; 15. a water storage cavity; 151. a first diversion section; 152. a water storage section; 153. a second diversion section; 16. an auxiliary flow passage; 2. a cyclone separator; 3. a partition plate; 31. a flow passage hole; 4. a pressure detecting member; 5. a temperature detection member; 6. a drain solenoid valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A hydrogen fuel cell system is widely used in vehicles as the most common fuel cell system. In the existing fuel cell system, a gas-liquid separator is adopted to perform gas-water separation on liquid water and wet gas discharged from an anode so as to improve the utilization rate of fuel gas. In the existing gas-liquid separator, the water storage area is a cavity structure connected between the separation cavity and the water outlet, and liquid water accumulated in the water storage area is easy to freeze under a low-temperature environment, so that the gas-liquid separator is blocked.
For a hydrogen fuel cell, the separation efficiency of a gas-liquid separator is crucial to the utilization rate of hydrogen, the existing gas-liquid separator has an air flow entrainment phenomenon in the operation process, a large amount of liquid water is entrained into the gas again after separation, and the separation efficiency is reduced.
As shown in fig. 3 to 6, in order to solve the above problems, the present embodiment provides a gas-liquid separator and a fuel cell system, the fuel cell system includes the gas-liquid separator, the gas-liquid separator separates the mixture of water and wet gas discharged from the anode of the fuel cell, and the separated fuel gas is returned to the fuel cell system for reuse. In the hydrogen fuel cell system, the gas-liquid separator is mainly used for gas-liquid separation of a mixture of gaseous water, water mist, liquid water and hydrogen gas, and the gas-liquid separator is a gas-water separator.
Specifically, the gas-liquid separator comprises a shell 1, the shell 1 comprises a separation cavity 11, and a mixed gas inlet 12, an exhaust port 13 and a water discharge port 14 which are respectively communicated with the separation cavity 11, and a cyclone separator 2 is arranged in the separation cavity 11. As shown in fig. 3, the bold solid arrows indicate the flow direction of the gas-water mixture, the arc-shaped solid arrows indicate the forced cyclone traces generated by the cyclone-type separator 2, the open arrows indicate the flow direction of the separated fuel gas, and the thin solid arrows indicate the flow direction of the separated water. The water mixture discharged from the anode of the fuel cell system enters the shell 1 through the mixed gas inlet 12, after being separated by the cyclone separator 2, the separated water descends along the inner wall of the separation cavity 11 and is finally discharged through the water discharge port 14, and the separated fuel gas is discharged through the gas discharge port 13 and is finally returned to the fuel cell system for reuse.
Further, the housing 1 further comprises a water storage cavity 15 and an auxiliary runner 16, the water storage cavity 15 is located below the separation cavity 11, the water storage cavity 15 comprises a first flow guide section 151, a water storage section 152 and a second flow guide section 153, the water storage section 152 is located below the water outlet 14, two ends of the first flow guide section 151 are respectively connected with the separation cavity 11 and the water storage section 152, and two ends of the second flow guide section 153 are respectively connected with the water storage section 152 and the water outlet 14; the auxiliary channel 16 is located above the water storage section 152, one end of the auxiliary channel 16 is connected to the first flow guiding section 151 and the separation chamber 11, and the other end is connected to the second flow guiding section 153 and the water outlet 14. The water storage cavity 15 and the auxiliary runner 16 are arranged between the separation cavity 11 and the water outlet 14 in parallel, the water storage section 152 of the water storage cavity 15 is arranged below the water outlet 14, and the auxiliary runner 16 is arranged above the water storage section 152, so that even if a certain amount of water is accumulated in the water storage section 152 and the part of water freezes in a low-temperature environment, the water outlet 14 cannot be blocked, the newly separated water can also flow to the water outlet 14 from the auxiliary runner 16, and the problem that the gas-liquid separator cannot work due to blocking easily in the low-temperature environment is solved.
In this embodiment, the water storage section 152 of the water storage cavity 15 is located at the lowest point of the gas-liquid separator, the separated water flows into the water storage cavity 15 under the action of gravity and is stored in the water storage section 152, and in a low-temperature environment, after anode purging, all water in the water storage cavity 15 can be discharged through the water outlet 14. Along with the temperature reduces gradually after the fuel cell system shuts down, the liquid water that the fuel cell system condensed out gathers the water storage chamber 15 again gradually, when the water that accumulates in the water storage chamber 15 freezes, supplementary runner 16 still unobstructed, can realize low temperature cold start drainage. After the fuel cell system is started, the temperature inside the gas-liquid separator gradually rises along with the increase of the starting time of the fuel cell system, and the frozen water gradually melts, so that the frozen water can be discharged out of the gas-liquid separator under the action of the purge gas flow. Preferably, the cross-sectional area of the auxiliary flow passage 16 is smaller than that of the water storage section 152, which facilitates the reduction of the volume of the gas-liquid separator while achieving the function of standby drainage.
Preferably, the first flow guide section 151, the second flow guide section 152 and the second flow guide section 153 are sequentially connected end to form the U-shaped water storage cavity 15, so that water in the water storage cavity 15 can be completely discharged under the action of the purge air flow.
Further, along the water flow direction, the cross sectional area of the first flow guide section 151 is gradually reduced, so that the first flow guide section 151 is in a structure with a large inlet and a small outlet along the purging air flow direction, the flow velocity of the purging air can be reduced, and liquid water is more easily collected to the water storage cavity 15 under the action of gravity. Furthermore, the cross sectional area of the connection part of the first flow guide section 151 and the water storage section 152 is equal to that of the water storage section 152, a contraction structure is formed, the flow rate of the purging gas can be improved, the purging coiling force can be improved by matching the structure of the U-shaped water storage cavity 15, and the liquid water is promoted to be completely discharged out of the gas-liquid separator.
Preferably, the inner wall of one side of the first flow guide section 151 close to the second flow guide section 153 is obliquely arranged, and the inner wall of one side of the first flow guide section 151 far away from the second flow guide section 153 is vertically arranged, so that the purging airflow can be guided, and the purging winding force is promoted. Specifically, in the water flow direction, the water inlet end of the auxiliary flow channel 16 is connected to the water inlet end of the first diversion section 151, the water inlet end of the auxiliary flow channel 16 is located on the inner wall of the first diversion section 151, which is obliquely arranged, so as to facilitate the separated water to enter the auxiliary flow channel 16, and the water outlet end of the auxiliary flow channel 16 is connected to the water outlet end of the second diversion section 153, preferably, the center line of the auxiliary flow channel 16 coincides with the center line of the water outlet 14, so as to facilitate the water in the auxiliary flow channel 16 to enter the water outlet 14.
The gas-liquid mixture entering the gas-liquid separator is separated by the forced cyclone generated by the cyclone separator 2 in the separation cavity 11, in order to avoid the separated liquid water from being sucked by the airflow again, the gas-liquid separator of the embodiment further comprises a partition plate 3 arranged between the separation cavity 11 and the water storage cavity 15, the partition plate 3 is provided with a plurality of runner holes 31, the separation cavity 11 is communicated with the water storage cavity 15 through the runner holes 31, and the separated water flows into the water storage cavity 15 through the runner holes 31. The baffle 3 is utilized to isolate the airflow, so that the entrainment effect can be greatly weakened, and the separation efficiency is improved. Illustratively, the flow passage holes 31 are preferably circular holes, which facilitates machining. Of course, the flow passage hole 31 may also be a rectangular hole, a triangular hole, or other shaped holes, and is not limited herein.
The gas-liquid separator further comprises a pressure detection member 4 for detecting the gas pressure in the separation chamber 11. The pressure detection member 4 is exemplarily a pressure sensor. In the prior art, most of pressure sensors of the gas-liquid separator are horizontally arranged, and liquid water in the separation cavity 11 easily enters the cavity of the sensor or a spring diaphragm, so that the detection precision of the sensor is reduced or the sensor is directly damaged. In order to solve the above problem, in the present embodiment, the center line of the pressure detection member 4 is disposed parallel to the center line of the separation chamber 11, and specifically, the pressure sensor is disposed vertically on the top of the housing 1.
The gas-liquid separator further comprises a temperature detection member 5 for detecting the temperature of the air in the separation chamber 11.
The gas-liquid separator also comprises a drainage electromagnetic valve 6, the drainage electromagnetic valve 6 is arranged at a drainage port 14, and the drainage electromagnetic valve 6 is controlled to be opened when drainage is needed; when the water is not required to be drained, the water drainage electromagnetic valve 6 is controlled to be closed.
It should be noted that the separated water can be stored in the water storage section 152 of the water storage cavity 15, and in order to ensure that the water storage section 152 of the water storage cavity 15 can accommodate the maximum amount of condensed water generated after the fuel cell system is shut down and not excessively increase the volume of the gas-liquid separator, in this embodiment, the volume of the water storage section 152 of the water storage cavity 15 is strictly calculated, and the calculation process is as follows:
firstly, assuming the highest temperature of the fuel cell system stack operation as T, calculating the maximum saturated vapor pressure Pvs of the anode vapor of the fuel cell system,
where a, b, c, d, f, and g are constants, illustratively, a-5800.2206, b-1.3914993, c-0.048640239, d-0.41764768, f-0.14452093, and g-6.5459673; e is a natural base number.
Further, assuming that the maximum total gas pressure of the anode of the fuel cell system is P and the volume of the anode cavity of the fuel cell system is V, the maximum total molar quantity N of the anode gas when the fuel cell system is shut down is calculated according to the ideal gas equationMixing，
Wherein R is a constant. It should be noted that the volume V of the anode cavity of the fuel cell system is the total volume including the anode cavity of the stack and the pipeline communicated with the anode cavity.
Then, the molar quantity N of water vapor in the anode gas at the time of shutdown of the fuel cell system was calculated according to the Dalton theoremWater (W)，
Then converting the volume V of the water vapor into liquid waterWater (W)，
Wherein M isWater (W)Is the molar mass of water; rhoWater (W)Is the density of water. Preferably, the volume V of the water storage section 152 of the water storage cavity 151＝VWater (W)So that the water storage section 152 of the water storage cavity 15 can not only accommodate the maximum amount of condensed water generated after the fuel cell system is shut down, but also not excessively increase the gas-liquid separationThe volume of the vessel.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. The utility model provides a vapour and liquid separator, includes casing (1), casing (1) including separation chamber (11) and respectively with gas mixture import (12), gas vent (13) and outlet (14) that separation chamber (11) communicate, its characterized in that, casing (1) still includes:
the water storage cavity (15) is positioned below the separation cavity (11), the water storage cavity (15) comprises a water storage section (152), a first flow guide section (151) and a second flow guide section (153), the water storage section (152) is positioned below the water outlet (14), two ends of the first flow guide section (151) are respectively connected with the separation cavity (11) and the water storage section (152), and two ends of the second flow guide section (153) are respectively connected with the water storage section (152) and the water outlet (14);
and the auxiliary flow channel (16) is positioned above the water storage section (152), one end of the auxiliary flow channel (16) is simultaneously connected with the first flow guide section (151) and the separation cavity (11), and the other end of the auxiliary flow channel is simultaneously connected with the second flow guide section (153) and the water outlet (14).
2. The gas-liquid separator according to claim 1, wherein the cross-sectional area of the first flow guiding section (151) decreases gradually along the water flow direction.
3. The gas-liquid separator of claim 2, wherein the cross-sectional area of the connection of the first flow guide section (151) and the water storage section (152) is equal to the cross-sectional area of the water storage section (152).
4. The gas-liquid separator according to claim 2, wherein the inner wall of the first guide section (151) on the side close to the second guide section (153) is inclined, and the inner wall of the first guide section (151) on the side far from the second guide section (153) is vertical.
5. The gas-liquid separator according to claim 1, further comprising a partition plate (3) disposed between the separation chamber (11) and the water storage chamber (15), wherein the partition plate (3) is provided with a plurality of passage holes (31), and the separation chamber (11) is communicated with the water storage chamber (15) through the passage holes (31).
6. The gas-liquid separator according to claim 1, wherein said water storage cavity (15) is U-shaped.
7. The gas-liquid separator of claim 1, wherein the cross-sectional area of the auxiliary runner (16) is smaller than the cross-sectional area of the water storage section (152).
8. The gas-liquid separator according to claim 1, further comprising a pressure detecting member (4) for detecting a gas pressure in the separation chamber (11), a center line of the pressure detecting member (4) being disposed in parallel with a center line of the separation chamber (11).
9. A fuel cell system characterized by comprising the gas-liquid separator according to any one of claims 1 to 8.
10. A fuel cell system according to claim 9, wherein the volume of the water storage section (152) of the water storage cavity (15) is V1Then, then
NMixingIs the maximum total molar amount of anode gas at shutdown of the fuel cell system;
pvs is the maximum saturated vapor pressure of the fuel cell system anode water vapor;
p is the maximum total gas pressure of the anode of the fuel cell system;
Mwater (W)Is the molar mass of water;
ρwater (W)Is the density of water.
11. The fuel cell system according to claim 10, wherein the total molar maximum amount of the anode gas at the time of shutdown of the fuel cell system
P is the maximum total gas pressure of the anode of the fuel cell system;
v is the volume of the anode cavity of the fuel cell system;
r is a constant;
and T is the highest operation temperature of the fuel cell system stack.
12. The fuel cell system of claim 10, wherein the maximum saturated vapor pressure of anode water vapor of the fuel cell system
a. b, c, d, f and g are constants;
e is a natural base number;
and T is the highest operation temperature of the fuel cell system stack.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114784327A (en) * | 2022-04-08 | 2022-07-22 | 中汽创智科技有限公司 | Gas-water separator, fuel cell water management system and method |
| CN115188995A (en) * | 2022-08-18 | 2022-10-14 | 武汉雄韬氢雄燃料电池科技有限公司 | Design method of water separator of fuel cell system |
| CN115954503A (en) * | 2023-03-14 | 2023-04-11 | 西安旭旌再生资源有限公司 | Hydrogen fuel cell water-gas separation system |
| CN116928136A (en) * | 2023-07-19 | 2023-10-24 | 江苏大学 | Gas-water separation device applied to hydrogen circulating pump |
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| CN116928136A (en) * | 2023-07-19 | 2023-10-24 | 江苏大学 | Gas-water separation device applied to hydrogen circulating pump |
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