CN110429301B - High-temperature air mixer and SOFC air inlet system - Google Patents
High-temperature air mixer and SOFC air inlet system Download PDFInfo
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- CN110429301B CN110429301B CN201910578077.XA CN201910578077A CN110429301B CN 110429301 B CN110429301 B CN 110429301B CN 201910578077 A CN201910578077 A CN 201910578077A CN 110429301 B CN110429301 B CN 110429301B
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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
- H01M8/04104—Regulation of differential pressures
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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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0438—Pressure; Ambient pressure; Flow
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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
- H01M8/04753—Pressure; Flow of fuel cell reactants
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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 present invention relates to a high temperature air mixer, comprising: one end of the main air inlet pipe is an air inlet end for air to enter, and the other end of the main air inlet pipe is an air outlet end connected with an air inlet main pipe of the SOFC air inlet system; the hollow convex ring circumferentially surrounds the outer wall of the main air inlet pipe and is in sealing connection with the outer wall of the main air inlet pipe; the side air inlet pipe is communicated with the inner cavity of the hollow convex ring and is used for introducing temperature-adjusting air; the gas mixing opening is formed in the side wall of the main gas inlet pipe covered by the hollow convex ring, the number of the gas mixing openings is multiple, and the area of the gas mixing openings is gradually increased along with the increase of the distance between the gas mixing openings and the side gas inlet pipe. The high-temperature air mixer enables the temperature of air entering each galvanic pile to be more uniform and consistent, and therefore the galvanic piles are guaranteed to have higher working efficiency. The invention also discloses an SOFC air inlet system adopting the high-temperature air mixer.
Description
Technical Field
The invention relates to the technical field of solid oxide fuel cells, in particular to a high-temperature air mixer and an SOFC air inlet system.
Background
A Solid Oxide Fuel Cell (SOFC) is one type of Fuel Cell, which can directly use hydrocarbons obtained by converting fossil energy and biomass energy as Fuel, and convert chemical energy of the Fuel into electrical energy through external or internal reforming reaction and electrochemical reaction in an electrode.
The SOFC is composed of a plurality of cell stacks, each cell stack is provided with a fuel gas inlet and an air inlet, at present, air and fuel gas are respectively conveyed into each cell stack through an air inlet system and a fuel inlet system, the air inlet system comprises an air inlet manifold and an air inlet manifold connected with the air inlet manifold, the air inlet manifold and the air inlet of the cell stack are arranged in a one-to-one correspondence mode, air firstly enters the air inlet manifold, and then enters each cell stack through the air inlet manifold.
The temperature of the air in the intake manifold may be higher or lower, and in order to adjust the air temperature to the reaction temperature required by the fuel cell, an intake branch pipe that communicates with the intake manifold and through which temperature-adjusted air flows is also typically provided.
The existing air inlet branch pipe is only simply and directly communicated with an air inlet main pipe, and temperature-adjusting air in the air inlet branch pipe and air in the air inlet main pipe cannot be uniformly mixed, so that the temperature of air entering a cell stack through an air inlet manifold is not uniform enough, and the working efficiency of each cell stack is influenced.
Disclosure of Invention
One of the objectives of the present invention is to provide a high temperature air mixer to make the temperature of the air entering into the stack more uniform, thereby ensuring the overall working efficiency of the SOFC stack.
The invention also aims to provide an SOFC air inlet system adopting the high-temperature air mixer.
In order to achieve the above object, the present invention provides a high temperature air mixer for use in an SOFC air intake system, comprising:
one end of the main air inlet pipe is an air inlet end for air to enter, and the other end of the main air inlet pipe is an air outlet end connected with an air inlet main pipe of the SOFC air inlet system;
the hollow convex ring circumferentially surrounds the outer wall of the main air inlet pipe and is connected with the outer wall of the main air inlet pipe in a sealing manner;
the side air inlet pipe is communicated with the inner cavity of the hollow convex ring and is used for introducing temperature-adjusting air;
the gas mixing port is arranged on the side wall of the main gas inlet pipe covered by the hollow convex ring, the number of the gas mixing ports is multiple, and the area of the gas mixing ports is gradually increased along with the increase of the distance between the gas mixing ports and the side gas inlet pipe.
Preferably, the axis of the side intake pipe is perpendicular to the axis of the main intake pipe, and a plane defined by the two is called a bisection plane, the bisection plane divides the side wall of the main intake pipe into a first side wall and a second side wall which are symmetrical, and the gas mixing port is symmetrically formed in the first side wall and the second side wall.
Preferably, the gas mixing ports are arranged in a row in the circumferential direction on the first side wall and the second side wall.
Preferably, the gas mixing port is rectangular.
Preferably, the gas mixing ports are arranged in a row on the first side wall and the second side wall, and the length of the gas mixing ports in the axial direction of the main inlet pipe is not less than 90% of the length of the hollow convex ring in the axial direction of the main inlet pipe.
Preferably, the lengths of the gas mixing ports in the axial direction of the main gas inlet pipe are equal on the first side wall and the second side wall.
Preferably, the gas mixing port closest to the side gas inlet pipe is called a top end mixing port, the radius of a main gas inlet pipe passing through the center of the top end mixing port is r, the included angle between the r and the median plane is alpha, and the alpha is more than or equal to 5 degrees and less than or equal to 15 degrees.
Preferably, the total area of the gas mixing openings formed in the first side wall is not less than 60% of the surface area of the first side wall.
The SOFC air inlet system disclosed by the invention comprises an air inlet main pipe, wherein the air inlet end of the air inlet main pipe is connected with the high-temperature air mixer disclosed in any one of the above.
In the high-temperature air mixer disclosed by the invention, an annular cavity is formed by arranging the hollow convex ring on the outer wall of the main air inlet pipe, the side air inlet pipe is communicated with the inner cavity of the hollow convex ring so as to convey temperature-adjusting air into the hollow convex ring, a gas mixing opening is formed in the side wall of the main air inlet pipe covered by the hollow convex ring, and the temperature-adjusting gas entering the hollow convex ring enters the main air inlet pipe through the gas mixing opening and is mixed with the air in the main air inlet pipe; the gas mixing port is provided in plurality on the side wall of the main intake pipe, and the area of the gas mixing port gradually increases with the increase of the distance from the side intake pipe.
Because the pressure of the air of adjusting the temperature of the position that is close to side intake pipe is big, the velocity of flow is fast, along with the gradual increase of side intake pipe distance, the pressure of air of adjusting the temperature reduces gradually, the velocity of flow descends gradually, based on this, along with the area gradual increase mode of the gaseous mixture mouth of increase with side intake pipe distance, can guarantee that the volume that the air of adjusting the temperature enters into main intake pipe at upstream position and low reaches position tends to unanimity, thereby guarantee that the air of adjusting the temperature can with the air homogeneous mixing in the main intake pipe, control the difference value of the highest temperature and the minimum temperature of air in ideal scope on the same cross section of main intake pipe, finally make the temperature of the air that enters into each pile more homogeneous unanimous, thereby guarantee that the pile has higher work efficiency.
The SOFC air inlet system disclosed by the invention adopts the high-temperature air mixer, so that the temperature of air entering each galvanic pile is more uniform, and the SOFC air inlet system can ensure that the galvanic piles have higher working efficiency.
Drawings
Fig. 1 is a schematic structural view of a high temperature air mixer disclosed in an embodiment of the present invention, which is cut by a plane parallel to an axis of a main intake pipe.
Wherein, 1 is the inlet end, 2 is the side inlet pipe, 3 is the end of giving vent to anger, 4 is the cavity bulge loop, 5 is main inlet pipe, 5.1 is the bottom mixing port, 5.2 is middle part mixing port, 5.3 is top mixing port.
Detailed Description
One of the cores of the invention is to provide a high-temperature air mixer to make the temperature of air entering the SOFC stack more uniform, thereby ensuring the overall working efficiency of the SOFC stack.
The invention also provides an SOFC air inlet system adopting the high-temperature air mixer.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the high temperature air mixer disclosed in this embodiment is used in an SOFC air intake system, and includes a main air intake pipe 5, a hollow convex ring 4, a side air intake pipe 2, and a gas mixing port, where one end of the main air intake pipe 5 is an air intake end 1 for air to enter, and the other end is an air outlet end 3, the air outlet end 3 is used to connect with an air intake main of the SOFC air intake system, the hollow convex ring 4 circumferentially surrounds an outer wall of the main air intake pipe 5, and the hollow convex ring 4 is hermetically connected with the outer wall of the main air intake pipe 5, a cavity is formed between the hollow convex ring 4 and the outer wall of the main air intake pipe 5, as shown in fig. 1, the side air intake pipe 2 is communicated with an inner cavity of the hollow convex ring 4, and the side air intake pipe 2 is used to introduce temperature-adjusting air, the gas mixing port is opened on a side wall of the main air intake pipe 5 covered by the hollow convex ring 4, as shown, and the area of the gas mixing opening close to the side gas inlet pipe 2 is smaller than the area of the gas mixing opening far from the side gas inlet pipe 2.
It should be noted that the high temperature air mixer specifically means that the temperature of the air after completion of mixing is about 600 ℃, but of course, the high temperature air mixer may be simply referred to as an air mixer, and normally, the suitable reaction temperature of the SOFC is about 600 ℃, the temperature of the air introduced into the main intake pipe 5 may be higher than the suitable reaction temperature of the SOFC or lower than the suitable reaction temperature of the SOFC, and the temperature of the air introduced into the intake manifold can be brought within the suitable reaction temperature range of the SOFC by mixing the temperature-adjusted air with the air in the main intake pipe 5.
In the high-temperature air mixer disclosed in the above embodiment, the hollow convex ring 4 is arranged on the outer wall of the main air inlet pipe 5 to form an annular cavity, the side air inlet pipe 2 is communicated with the inner cavity of the hollow convex ring 4 to achieve the purpose of conveying temperature-adjusting air into the hollow convex ring 4, a gas mixing opening is formed in the side wall of the main air inlet pipe 5 covered by the hollow convex ring 4, and the temperature-adjusting air entering the hollow convex ring 4 enters the main air inlet pipe 5 through the gas mixing opening and is mixed with the air in the main air inlet pipe 5; the gas mixing ports are provided in plurality on the side wall of the main intake pipe 5, and the area of the gas mixing ports gradually increases as the distance from the side intake pipe 2 increases.
Because the pressure of the temperature-adjusting air at the position close to the side air inlet pipe 2 is high and the flow speed is high, the pressure of the temperature-adjusting air is gradually reduced and the flow speed is gradually reduced along with the gradual increase of the distance from the side air inlet pipe 2, therefore, the area of the gas mixing opening close to the side gas inlet pipe 2 is smaller, the area of the gas mixing opening far from the side gas inlet pipe 2 is larger, the amount of the temperature-adjusting air entering the main air inlet pipe 5 at the upstream position (the position close to the side air inlet pipe) and the downstream position (the position far away from the side air inlet pipe) can be ensured to be consistent, thereby ensuring that the temperature-adjusting air can be uniformly mixed with the air in the main air inlet pipe 5, the difference value of the highest temperature and the lowest temperature of the air is controlled within an ideal range on the same cross section of the main air inlet pipe 5, and finally the temperature of the air entering each galvanic pile is more uniform and consistent, so that the galvanic pile is ensured to have higher working efficiency.
In one embodiment, the axis of the side intake pipe 2 perpendicularly intersects the axis of the main intake pipe 5, as shown in fig. 1, and the plane defined by the axis of the side intake pipe 2 and the axis of the main intake pipe 5 is referred to as a bisecting plane, which divides the side wall of the main intake pipe 5 into a first side wall and a second side wall that are symmetrical, and the gas mixing ports are symmetrically formed in the first side wall and the second side wall.
In the above embodiment, the fact that the gas mixing openings are symmetrically formed in the first side wall and the second side wall means that the gas mixing openings formed in the first side wall and the gas mixing openings formed in the second side wall are symmetrically distributed about the median plane.
The gas mixing openings may be regularly or irregularly arranged on the first side wall and the second side wall, and in this embodiment, the gas mixing openings are arranged in a row along the circumferential direction. It should be further noted that the specific shape of the gas mixing port is not limited, but from the aspects of cost and processing difficulty, it is recommended to design the gas mixing port as a rectangle in the present embodiment, as shown in fig. 1.
In another embodiment, the gas mixing ports are arranged in a row on the first side wall and the second side wall, and the length of the gas mixing ports in the axial direction of the main gas inlet pipe 5 is not less than 90% of the length of the hollow convex ring 4 in the axial direction of the main gas inlet pipe 5.
In order to further reduce the pressure loss of the temperature-regulated air when the temperature-regulated air enters the main air inlet pipe 5, the embodiment is further optimized, specifically, the air mixing port closest to the side air inlet pipe 2 is called a top end mixing port 5.3, the radius of the main air inlet pipe passing through the center (intersection point of rectangular diagonals) of the top end mixing port 5.3 is r, the included angle between r and the bisecting plane is alpha, and the angle is more than or equal to 5 degrees and less than or equal to 15 degrees. This kind of design makes the top mix mouthful 5.3 near the distance of side intake pipe 2, thereby effectively reduced the pressure drop effect that the lateral wall of main intake pipe 5 brought for the air that adjusts the temperature, consider the convenience of processing, can be 10 with alpha design, the area of increase gas mixing mouthful can effectively reduce the lateral wall of main intake pipe 5 and give the pressure drop that the air that adjusts the temperature caused, consequently the total area of the gas mixing mouth of seting up on the first lateral wall in this embodiment is not less than 60% of first lateral wall surface area, correspondingly, the total area of the gas mixing mouth of seting up on the second lateral wall is not less than 60% of second lateral wall surface area yet.
As shown in fig. 1, the first side wall or the second side wall is respectively provided with three gas mixing ports, which are respectively a top mixing port 5.3, a bottom mixing port 5.1 and a middle mixing port 5.2, of course, those skilled in the art may also provide other numbers of gas mixing ports on the first side wall or the second side wall as required, and the number of the gas mixing ports in the present invention is not particularly limited.
The high temperature air mixer may be made of 316 type stainless steel, although more excellent nichrome may be used as the production cost allows.
In addition, the invention also discloses an SOFC air inlet system, which comprises an air inlet main pipe and an air inlet manifold connected with the air inlet main pipe, wherein the air inlet end of the air inlet main pipe is connected with the high-temperature air mixer disclosed in any one of the above.
Due to the adoption of the high-temperature air mixer, the SOFC air recent system has the corresponding technical advantages of the high-temperature air mixer, and the detailed description is omitted herein.
The high temperature air mixer and the SOFC air inlet system provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. An air mixer for use in an SOFC air induction system, comprising:
the air inlet pipe comprises a main air inlet pipe (5), wherein one end of the main air inlet pipe (5) is an air inlet end (1) for air to enter, and the other end of the main air inlet pipe is an air outlet end (3) connected with an air inlet main pipe of the SOFC air inlet system;
the hollow convex ring (4) circumferentially surrounds the outer wall of the main air inlet pipe (5), and the hollow convex ring (4) is connected with the outer wall of the main air inlet pipe (5) in a sealing manner;
the side air inlet pipe (2), the side air inlet pipe (2) is communicated with the inner cavity of the hollow convex ring (4), and the side air inlet pipe (2) is used for introducing temperature-adjusting air;
the gas mixing port is formed in the side wall of a main gas inlet pipe (5) covered by the hollow convex ring (4), the number of the gas mixing ports is multiple, and the area of the gas mixing ports is gradually increased along with the increase of the distance between the gas mixing ports and the side gas inlet pipe (2).
2. An air mixer according to claim 1, wherein the axis of the side intake pipe (2) is perpendicular to the axis of the main intake pipe (5), and the plane defined by the two is called a bisecting plane, the bisecting plane divides the side wall of the main intake pipe (5) into a first side wall and a second side wall which are symmetrical, and the gas mixing opening is symmetrically arranged on the first side wall and the second side wall.
3. The air mixer of claim 2, wherein the gas mixing ports are circumferentially arranged in a row on both the first sidewall and the second sidewall.
4. The air mixer of claim 3, wherein the gas mixing port is rectangular.
5. An air mixer according to claim 4, wherein the gas mixing ports are arranged in a row on the first side wall and the second side wall, and the length of the gas mixing ports in the axial direction of the main inlet pipe (5) is not less than 90% of the length of the hollow convex ring (4) in the axial direction of the main inlet pipe (5).
6. An air mixer according to claim 5, wherein the lengths of the respective gas mixing openings in the axial direction of the main inlet pipe (5) are equal in the first and second side walls.
7. An air mixer according to claim 4, characterized in that the gas mixing port closest to the side inlet pipe (2) is called the top mixing port (5.3), the radius of the main inlet pipe passing through the center of the top mixing port (5.3) is r, the angle between r and the median plane is α, wherein α is 5 ° or more and 15 ° or less.
8. The air mixer according to any of claims 2-7, wherein the total area of the gas mixing openings formed in the first side wall is not less than 60% of the surface area of the first side wall.
9. An SOFC air inlet system comprising an air inlet manifold, wherein the air inlet end of the air inlet manifold is connected to an air mixer according to any one of claims 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578077.XA CN110429301B (en) | 2019-06-28 | 2019-06-28 | High-temperature air mixer and SOFC air inlet system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910578077.XA CN110429301B (en) | 2019-06-28 | 2019-06-28 | High-temperature air mixer and SOFC air inlet system |
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| CN110429301A CN110429301A (en) | 2019-11-08 |
| CN110429301B true CN110429301B (en) | 2021-04-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022084714A1 (en) * | 2020-10-20 | 2022-04-28 | Ceres Intellectual Property Company Limited | High-temperature air mixer and sofc air intake system |
| CN113820606B (en) * | 2021-10-19 | 2024-09-27 | 济南大学 | Solid oxide battery performance testing device |
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| US20090073799A1 (en) * | 2007-08-03 | 2009-03-19 | Remi Bourlart | Gaseous fluid mixing apparatus |
| US20160036078A1 (en) * | 2014-07-29 | 2016-02-04 | Robert Bosch Gmbh | Fuel cell device |
| CN106438115A (en) * | 2016-11-30 | 2017-02-22 | 东风商用车有限公司 | Natural gas mixer |
| CN107966297A (en) * | 2017-12-26 | 2018-04-27 | 中国航发四川燃气涡轮研究院 | A kind of inner cone injecting type not isothermal air inlet mixing device |
| WO2018080809A1 (en) * | 2016-10-25 | 2018-05-03 | Lg Fuel Cell Systems Inc. | Reformer with bypass for internal fuel cell reforming |
| CN208236518U (en) * | 2018-05-24 | 2018-12-14 | 湖南聚辉能源科技有限公司 | A kind of gas mixer of gas engine |
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2019
- 2019-06-28 CN CN201910578077.XA patent/CN110429301B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090073799A1 (en) * | 2007-08-03 | 2009-03-19 | Remi Bourlart | Gaseous fluid mixing apparatus |
| US20160036078A1 (en) * | 2014-07-29 | 2016-02-04 | Robert Bosch Gmbh | Fuel cell device |
| WO2018080809A1 (en) * | 2016-10-25 | 2018-05-03 | Lg Fuel Cell Systems Inc. | Reformer with bypass for internal fuel cell reforming |
| CN106438115A (en) * | 2016-11-30 | 2017-02-22 | 东风商用车有限公司 | Natural gas mixer |
| CN107966297A (en) * | 2017-12-26 | 2018-04-27 | 中国航发四川燃气涡轮研究院 | A kind of inner cone injecting type not isothermal air inlet mixing device |
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