CN115036525B - Fuel cell power generation module - Google Patents
Fuel cell power generation module Download PDFInfo
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- CN115036525B CN115036525B CN202110245213.0A CN202110245213A CN115036525B CN 115036525 B CN115036525 B CN 115036525B CN 202110245213 A CN202110245213 A CN 202110245213A CN 115036525 B CN115036525 B CN 115036525B
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- 239000000446 fuel Substances 0.000 title claims abstract description 54
- 238000007789 sealing Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 119
- 239000002737 fuel gas Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 description 7
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
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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
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2457—Grouping of fuel cells, e.g. stacking of fuel cells with both reactants being gaseous or vaporised
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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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/249—Grouping of fuel cells, e.g. stacking of fuel cells comprising two or more groupings of fuel cells, e.g. modular assemblies
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Combustion & Propulsion (AREA)
Abstract
The invention discloses a fuel cell power generation module, which comprises an electric pile heat box (100) and pile tower modules (200), wherein the pile tower modules are embedded in a box cavity of the electric pile heat box (100) and comprise a plurality of pile tower unit groups (300) which are arranged at intervals along the width direction (W) of the box body, and each pile tower unit group (300) comprises a plurality of pile tower units (310) which are arranged along the length direction (L) of the box body and are sequentially connected in series. The built-in pile tower module structure of electric pile hot box, pile tower unit group along box width direction interval arrangement, pile tower unit is along box length direction series arrangement, compact structure, and the power is easily expanded, and generating efficiency is high. The pile tower unit is tightly fixed in the electric pile hot box, and the process is simple and convenient for assembly. The fuel gas pipeline is internally arranged in the cathode gas chamber and exchanges heat with the cathode gas, so that the consistency of the temperature of the cathode gas and the anode gas is ensured, the influence of the temperature difference of the cathode gas and the anode gas on the fuel cell power generation module is reduced, and the stable operation of the fuel cell power generation module is ensured.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a fuel cell power generation module.
Background
In an air SOFC stack integrated power generation system module, cathode air and anode fuel gas react and directly convert chemical energy present in the burner and air into electrical energy. The power generation system module generally comprises a plurality of pile towers, the existing power generation module is in annular arrangement, a fuel reformer and an anode heat exchanger are arranged in an annular cavity, a cathode heat exchanger is also cylindrical and is arranged at the outermost side of the module, and the air flow direction is 'outside in and inside out'. The stack tower is longitudinally stacked to form a stack tower module, and for a small system or a fuel cell power generation module system with larger volume power density, the longitudinal stacking needs to weld or fix each stack tower of the stack tower module in other manners so as to ensure the installation stability of the stack tower module, and the greater the number of the stack tower longitudinal stacks, the higher the height of the stack tower. Therefore, the longitudinal stacking mode of the stacking towers not only causes difficult assembly, but also limits the stacking number of the stacking towers, so that the power of the power generation module is not easy to expand.
In addition, in the process of the fuel cell power generation module, the fuel gas and the air are combusted, the working temperature range is 600-800 ℃, so that a great amount of heat is also contained in the reaction tail gas, and how to reasonably recycle the tail gas heat is a concern. The common tail gas heat recovery method is to exchange heat between the inlet air and the tail gas through a heat exchanger, however, because the flow difference between the cathode and the anode is larger, the heat difference between the anode inlet air and the cathode inlet air is larger due to the simple heat exchange between the anode inlet air and the cathode inlet air, which is not beneficial to the stable operation of the fuel cell power generation module.
Disclosure of Invention
Aiming at the defects or shortcomings in the prior art, the invention provides a fuel cell power generation module which has the advantages of simple structure, simple and convenient assembly, easy power expansion, high power generation efficiency, consistent cathode and anode gas temperature and stable operation.
In order to achieve the above object, the present invention provides a fuel cell power generation module including:
A galvanic pile hot box; and
The tower stacking module is embedded in the box cavity of the electric pile hot box and comprises a plurality of tower stacking unit groups which are arranged at intervals along the width direction of the box body, and each tower stacking unit group comprises a plurality of tower stacking units which are arranged along the length direction of the box body and are sequentially connected in series;
wherein the tank chamber includes at least a first wide side chamber, a wide middle chamber, and a second wide side chamber formed by the stack unit components in the tank width direction.
In one embodiment, the electric pile hot box comprises a box top wall, a box bottom wall, a first box long-direction end wall and a second box long-direction end wall which are positioned at two ends of the box in the length direction, the pile tower module comprises a first pile tower unit group and a second pile tower unit group which are arranged at intervals along the width direction of the box, and the first pile tower unit group and the second pile tower unit group respectively extend from the box bottom wall to the box top wall and from the first box long-direction end wall to the second box long-direction end wall.
In one embodiment, the stack column unit group includes:
the tower stacking units are sequentially arranged at intervals along the length direction of the box body; and
A heat-insulating sealing layer filled between adjacent tower stacking units;
The pile tower unit comprises a pile tower unit body and a weight block, wherein the pile tower unit body is arranged on the bottom wall of the box body in a stacked mode, the weight block is used for pressing the pile tower unit body by gravity, and the weight block is propped between the top end of the pile tower unit body and the top wall of the box body.
In one embodiment, the pile tower unit is provided with an electricity taking lug.
In one embodiment, the fuel cell power generation module further comprises a cathode gas piping system comprising:
A cathode gas inlet pipe extending into the first and second wide side chambers, respectively; and
And a cathode gas outlet pipe extending outwards from the wide-direction middle chamber.
In one embodiment, the cathode gas piping system further comprises a first cathode heat exchanger and a second cathode heat exchanger, the cathode gas inlet piping comprising:
The cathode air inlet main pipeline is respectively connected to the air inlet end of the first cathode heat exchanger and the air inlet end of the second cathode heat exchanger;
A first cathode inlet sub-pipe extending from an air outlet end of the first cathode heat exchanger and connected to the first wide side chamber; and
And a second cathode inlet sub-pipe extending from an air outlet end of the second cathode heat exchanger and connected to the second wide-directional side chamber.
In one embodiment, the cathode gas outlet pipe comprises:
The first cathode air outlet main pipeline extends out of the wide-direction middle chamber and is respectively connected to the tail gas inlet end of the first cathode heat exchanger and the tail gas inlet end of the second cathode heat exchanger; and
And the second cathode air outlet main pipeline extends out from the tail gas outlet end of the first cathode heat exchanger and the tail gas outlet end of the second cathode heat exchanger.
In one embodiment, the fuel cell power generation module further comprises an anode gas piping system comprising:
an anode heat exchanger;
An anode gas inlet pipe extending from a gas outlet end of the anode heat exchanger and into the first and second wide side chambers; and
And an anode gas outlet pipeline which extends out of the wide-direction middle chamber and is connected to the tail gas inlet end of the anode heat exchanger.
In one embodiment, the anode gas inlet conduit and the anode gas outlet conduit each comprise:
A main pipe section extending from the anode heat exchanger and into the tank body of the electric pile heat tank; and
A branch pipe section extending from a pipeline of the main pipe section and being sequentially connected in parallel by-pass to each of the tower stacking units;
Wherein the main pipe section of the anode gas inlet pipe extends into the chamber bottoms of the first and second wide side chambers.
In one embodiment, within the tank cavity, the anode gas conduit system of the first stack unit group and the anode gas conduit system of the second stack unit group are symmetrically distributed along the widthwise intermediate chamber.
In the fuel cell power generation module, a built-in pile tower module structure of the electric pile hot box is adopted, pile tower unit groups are distributed at intervals along the width direction of the box body, pile tower units are distributed in series along the length direction of the box body, the structure is compact, the power is easy to expand, and the power generation efficiency is high. The pile tower unit is tightly fixed in the electric pile hot box, and the process is simple and convenient for assembly. The fuel gas pipeline is arranged in the cathode gas cavity and exchanges heat with cathode gas, so that the consistency of the temperature of cathode gas and anode gas is ensured, the influence of the temperature difference of the cathode gas and the anode gas on the fuel cell power generation module is reduced, and the stable operation of the fuel cell power generation module is ensured.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
Fig. 1 is a schematic top view of a fuel cell power generation module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the left-hand internal structure of the fuel cell power generation module of the present invention, showing the hot box of the electric pile, the pile tower unit, the anode gas inlet pipe and the anode gas outlet pipe; and
Fig. 3 is a partial schematic view of the fuel cell power generation module of fig. 1, showing a stack of tower units and a heat insulating seal layer between each of the tower units.
Reference numerals illustrate:
100. pile tower module of electric pile hot box 200
300. Pile tower unit group
110. Case top wall 120 case bottom wall
130. First housing long side wall 140 and second housing long side wall
310. Pile tower unit
3110. Pile tower unit body 3120 weight block
1. The first broad side chamber 2 is a broad middle chamber
3. Second broad side chamber 4 heat insulating sealing layer
5. First cathode heat exchanger of electricity taking support lug 6
7. Cathode air inlet main pipeline of second cathode heat exchanger 8
9. First cathode inlet manifold 10 and second cathode inlet manifold
11. First cathode gas outlet header 12 second cathode gas outlet header
13. Anode gas inlet pipe of anode heat exchanger 14
15. Anode gas outlet pipeline
W box width direction L box length direction
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions. The azimuth term "inside and outside" is a term describing the mutual positional relationship of each component with respect to the inner cavity of the case and the outside of the case. "front, rear" and "case height direction" are indicated by arrows referring to the drawings.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention provides a fuel cell power generation module with an all-new structural design. Referring to the embodiment of fig. 1 to 3, the present invention provides a fuel cell power generation module including: a galvanic pile hot box 100 and a pile tower module 200;
Specifically, the electric pile hot box 100; and
A stack tower module 200, see fig. 1, the stack tower module 200 being fitted into a tank chamber of the electric stack heat tank 100 and including a plurality of stack tower unit groups 300 arranged at intervals in a tank width direction W, each stack tower unit group 300 including a plurality of stack tower units 310 arranged in a tank length direction L and connected in series in order, see fig. 2;
Among them, referring to fig. 1 and 2, the tank chamber includes at least a first widthwise side chamber 1, a widthwise middle chamber 2, and a second widthwise side chamber 3, which are partitioned by the stack unit group 300 in the tank width direction W.
The invention provides a fuel cell power generation module, which aims to solve the problems of assembly expansion and heat utilization of a plurality of small-sized pile towers integrated small-sized solid oxide fuel cell power generation modules. In the fuel cell power generation module, since a plurality of electric pile towers are integrally arranged, simplification of the assembly process and utilization of heat should be sufficiently considered from the practical application point of view. Therefore, how to control the assembly mode and the structural layout of the fuel cell power generation module is a concern, and the fuel cell power generation module which is easy to assemble and expand and has uniform temperature is formed as much as possible.
In the present embodiment, a multi-stack tower fuel cell power generation module integrated at a 20KW level is proposed for a small solid oxide fuel cell power generation module. The tower stacking module 200 is embedded in the electric pile heat box 100, and the electric pile heat box 100 can be square, round or polygonal. In this embodiment, the electric pile heat box 100 adopts a square shape, and the pile tower module 200 can be highly integrated and compactly arranged in the electric pile heat box 100, so that the square structure can not only reduce the volume of the electric pile heat box 100, but also obtain the minimum outer surface area, reduce the heat dissipation area of the electric pile heat box 100, and reduce the heat loss.
In order to improve the expandable space of the fuel cell power generation module, a plurality of stack tower cell groups 300 may be provided in the electric pile heat box 100, and as shown in fig. 1 and 2, two stack tower cell groups 300 are employed in the present embodiment, but are not limited thereto. The two tower stacking unit groups 300 are mutually independent and are arranged at intervals, each tower stacking module 200 can be linearly arranged along the length direction L of the box body by a plurality of tower stacking units 310, the tower stacking modules 200 can be arranged in parallel with the wall surface of the electric pile heat box 100, and the utilization rate of the box body cavity of the electric pile heat box 100 is improved to the greatest extent.
In comparison, the existing pile power generation modules mostly adopt a cylindrical shape, for example, in US009190673B2, an autonomously produced air-open SOFC pile integrated power generation system module is disclosed. The modules are generally in a cylindrical arrangement, and the pile units are separated by insulating blocks. The system module integrates cylindrical cathode and anode heat exchangers, and has compact structure. For the natural gas system integrating reforming, starting, cathode heat exchange and other functions, the heat can be fully utilized. In the module, air and fuel gas enter the module from the centers of the top end and the low end of the module respectively, flow into a hot area of a galvanic pile after exchanging heat along heat exchanger channels arranged in the center and the outer ring of the module, flow through the hot area, and return to the heat exchanger channels through a gas collecting structure to be discharged. Because the pile itself adopts an air open design, no air pipeline exists in the hot zone. The air is from the outside of round flow direction is measured in round tube. The electric pile is longitudinally stacked to form an electric pile module, a circuit adopts an upper-lower serial connection mode, and the upper part and the lower part of a single electric pile unit are provided with electricity taking structures.
The cylindrical modules are arranged in an annular mode, the longitudinal stacking of the electric piles is combined, the circuits are connected in series up and down, and in order to ensure that the electric piles are firmly fixed, the electric piles are connected with each other in a welding mode, a bolt mode and the like, so that the installation difficulty and the production cost are increased, and the longitudinal stacking is required to be expanded in the height direction of the electric pile power generation module, so that the expansion space is limited, and the expansion difficulty is increased.
Therefore, in the present invention, the stack tower units 310 are connected in series along the length direction L of the box body, so that stacking along the height direction of the electric stack heat box 100 is not required, the expansion number of the stack tower units 310 is limited less, and the electric stack heat box is easy to assemble and convenient to expand power. The plurality of tower stacking units 310 do not need to be welded or otherwise fixed, and only need to be pressed and fixed in the electric pile heat box 100, so that the process is simple and the installation is easy.
Further, in order to reduce the temperature difference between the anode gas and the cathode gas and ensure stable operation of the fuel cell power generation module, a gas piping system portion of the fuel cell power generation module may be built in the electric pile heat box 100. The partition plate may be installed in the electric pile heat box 100 to divide the space into a plurality of gas pipe system installation spaces, or may be directly divided into a plurality of gas pipe systems by the pile tower module 200. In this embodiment, a complete sealing surface is formed between the outer periphery of each tower stacking unit group 300 and the inner peripheral wall of the electric pile heat box 100, and the box cavity can be separated into a plurality of chambers by the tower stacking module 200, so that the sealing and independence of the chambers are ensured, no additional sealing partition is needed, the integration level of the fuel cell power generation module is improved to the greatest extent, and the production cost is reduced.
Specifically, in one embodiment, as shown in fig. 2, the electric pile heat box 100 may include a box top wall 110, a box bottom wall 120, and first and second box long side walls 130 and 140 at both ends of the box length direction L. The stack tower module 200 may include first and second stack tower cell groups spaced apart along the box width direction W, the first and second stack tower cell groups extending from the box bottom wall 120 to the box top wall 110 and from the first box long end wall 130 to the second box long end wall 140, respectively, thereby dividing the box cavity into sealed and independent first and second wide side chambers 1,2, and 3. One chamber of the three chambers can be used as a containing chamber of the inlet gas pipeline system, and the other chamber of the three chambers can be used as a containing chamber of the inlet gas pipeline system. The heat dissipation of the gas is reduced in the chamber of the box, and the mutual heat transfer between the gases is facilitated, so that the temperatures of the cathode gas and the anode gas tend to be consistent, and the stable operation of the fuel cell power generation module is ensured.
More specifically, since the tower cells 310 are made of metal materials, and the actual working temperatures of the tower cells 310 in the actual reaction process are slightly different, in order to avoid the mutual influence between the tower cells 310, to realize the mutual independence of the tower cells 310 and the convenient installation of the tower cells 310, an insulating material may be disposed between the tower cells 310, and in this embodiment, as shown in fig. 3, the tower cell group 300 may include a plurality of tower cells 310 and a heat insulation sealing layer 4; specifically, the plurality of tower stacking units 310 are sequentially arranged at intervals along the length direction L of the box body; and a heat insulating sealing layer 4 filled between the adjacent tower cells 310; the heat-insulating and sealing layer 4 can have the properties of insulation, sealing and heat insulation at the same time, and ensure mutual independence between the tower stacks 310, wherein the materials of the heat-insulating and sealing layer 4 can be various, and are not particularly limited herein.
For the stack unit 310, in order to secure the tightness of the three chambers and the stability of the stack unit 310, in one embodiment, the stack unit 310 may include a stack unit body 3110 stacked on the case bottom wall 120 and a weight 3120 for gravity pressing the stack unit body 3110, the weight 3120 being pressed between the top end of the stack unit body 3110 and the case top wall 110. The stack tower unit body 3110 may be a laminated structure and formed by stacking a plurality of single electric stacks, and a weight 3120 may be disposed on the top of the stack tower unit body 3110, and the weight 3120 applies gravity to the stack tower unit body 3110, thereby not only playing a role in fixing the stack tower unit 310, but also achieving a sealing effect between the stack tower unit 310 and the electric stack heat box 100. And the assembling process of the pile tower unit body 3110 and the weight 3120 is simple, and the installation is convenient.
For a multi-stack fuel cell power generation module integrated at 20KW level, in one embodiment, the stack unit 310 has power take-off lugs 5 extending therefrom, where the power take-off lugs 5 may be located at the first two ends of each stack unit 300 or at other locations, for example, between the first and second stack unit 300. In this embodiment, as shown in fig. 1, each stack unit group may include 4 stack units 310, each stack unit 310 may be 2.5kw, the electricity taking lugs are located at two ends of the first position of the stack unit group 300, the adjacent stack units 310 are serially connected to output, and each stack unit group 300 may output 10kw of power.
In the invention, the system comprises two large pipeline systems of cathode air and anode fuel gas, and in the existing cylindrical pile power generation module, the flow of the cathode and anode of the synthesis gas is relatively large, the module volume is small, and the specific surface area is large, so that the matched cathode and anode heat exchanger is also cylindrical. The specific surface area of the outer annular heat exchanger is large, and the heat dissipation loss is large. The cylindrical heat exchanger adopts a corrugated plate structure, and is a traditional plate type heat exchanger. The heat exchange strength of the synthetic gas is high, the gas flow is high, and the back pressure control requirement is high. Therefore, the cylindrical traditional plate heat exchanger has larger heat exchange area, and certain temperature difference exists between anode gas and cathode gas, so that certain influence is generated on the fuel cell power generation module.
Correspondingly, the plate-fin heat exchanger with small volume, high heat exchange intensity and large circulation and heat exchange area is adopted as much as possible in the invention, and can be arranged at two sides of the electric pile heat box 100 and cling to the outer wall surface of the electric pile heat box 100, so that the integration level of the heat exchanger can be improved, the heat exchange performance is high, meanwhile, each pipeline of the anode and each pipeline of the cathode can be regularly arranged between the electric pile heat box 100 and the heat exchanger, the installation is simple and convenient, and the integration level is high.
More specifically, returning to the present embodiment, as shown in fig. 1, as an example, the fuel cell power generation module may include a cathode gas piping system and an anode gas piping system, and the cathode gas piping system may include: a cathode gas inlet pipe and a cathode gas outlet pipe, wherein the cathode gas inlet pipe extends into the first wide side chamber 1 and the second wide side chamber 3 respectively; and a cathode gas outlet pipe extending outwardly from the wide-direction intermediate chamber 2. The cathode inlet air is air, the air in the electric pile hot box 100 is open, the air is introduced into the first wide side chamber 1 and the second wide side chamber 3 and flows into the corresponding pile tower unit group 300, and the cathode tail gas is discharged along the wide middle chamber 2.
Meanwhile, the anode gas piping system may include: an anode heat exchanger 13, an anode gas inlet pipe 14 and an anode gas outlet pipe 15; wherein the anode heat exchanger 13; an anode gas inlet pipe 14 extending from the gas outlet end of the anode heat exchanger 13 and into the first and second wide side chambers 1 and 3; and an anode gas outlet pipe 15 extending from the wide-directional intermediate chamber 2 and connected to an exhaust gas inlet end of the anode heat exchanger 13. The anode gas is fuel gas, unlike air, the fuel gas in the electric pile hot box 100 is non-open, the anode gas inlet pipeline 14 is arranged in the first wide side chamber 1 and the second wide side chamber 3, and exchanges heat with cathode inlet gas before entering the pile tower unit group 310, so that the temperature consistency of cathode inlet gas and anode inlet gas is ensured. After flowing through the tower stack unit group 310, the anode tail gas flows into the anode gas outlet pipe 15, and the anode gas outlet pipe 15 is arranged in the wide middle chamber 2, wherein the anode gas outlet pipe 15 may be located at the bottom of the wide middle chamber 2 or may be located at other positions of the wide middle chamber 2, and is not limited herein specifically. And the cathode and anode tail gas is subjected to heat exchange, so that the temperature consistency of the cathode and anode tail gas is ensured. The influence of the cathode and anode gas temperature difference on the fuel cell power generation module is reduced, and the stable operation of the fuel cell power generation module is ensured. In addition, the cathode gas piping and the anode gas piping are partially disposed in the electric pile heat box 100, so that heat dissipation can be further prevented and heat utilization efficiency can be improved.
Since the cathode gas flow is large, in order to improve the heat utilization rate of the tail gas, further, the cathode gas pipeline system may include two heat exchangers of the first cathode heat exchanger 6 and the second cathode heat exchanger 7, specifically, pipeline arrangement of the two heat exchangers may be that the cathode gas inlet pipeline includes a cathode inlet main pipeline 8, and the cathode gas inlet pipeline is respectively connected to an air inlet end of the first cathode heat exchanger 6 and an air inlet end of the second cathode heat exchanger 7; a first cathode inlet sub-pipe 9 extending from the air outlet end of the first cathode heat exchanger 6 and connected to the first wide-side chamber 1; and a second cathode inlet sub-pipe 10 extending from the air outlet end of the second cathode heat exchanger 7 and connected to the second wide-side chamber 3. The cathode gas outlet pipe includes: a first cathode outlet header pipe 11 extending from the wide-direction intermediate chamber 2 and connected to the tail gas inlet end of the first cathode heat exchanger 6 and the tail gas inlet end of the second cathode heat exchanger 7, respectively; and a second cathode outlet header pipe 12 extending from the exhaust outlet end of the first cathode heat exchanger 6 and the exhaust outlet end of the second cathode heat exchanger 7. The first cathode heat exchanger 6 and the second cathode heat exchanger 7 are used for exchanging heat of the cathode gas at the same time, so that the heat exchange efficiency is improved.
As for the anode gas pipe, in the present embodiment, as shown in fig. 1, since it is non-open, the anode gas inlet pipe 14 and the anode gas outlet pipe 15 each include: a main pipe section extending from the anode fuel gas outlet end of the anode heat exchanger 13 and into the box body of the electric pile heat box 100, wherein the main pipe section of the anode gas inlet pipe 14 extends into the first wide side chamber 1 and the second wide side chamber 3, and the main pipe section of the anode gas outlet pipe 15 extends from the wide middle chamber 2 and is connected with the anode tail gas inlet end of the anode heat exchanger 13. And branch pipe sections extending from the pipelines of the main pipe sections and being sequentially connected by-pass to the respective tower stacking units 310 in parallel; wherein the main pipe section of the anode gas inlet pipe 14 extends into the chamber bottoms of the first and second broad side chambers 1, 3.
Further, in order to ensure uniformity of the reactions in the respective stack units 310, in the chamber, the anode gas piping of the first stack unit group and the anode gas piping of the second stack unit group are symmetrically distributed along the widthwise middle chamber 2, as shown in fig. 1, with the center line of the box widthwise direction W of the electric pile heat box 100 as the symmetry axis. The anode inlet and outlet pipelines in the first pile of tower unit groups and the second pile of tower unit groups are symmetrically distributed, and the distribution of anode inlet and outlet gases is ensured to be uniform.
In summary, in the fuel cell power generation module of the present invention, a plurality of, for example, 2.5 kw-level stack units 310 are employed to form stack unit groups 300 arranged at intervals along the case width direction W, and stack units 310 arranged in series along the case length direction L, whereby the structure Cheng Duida module 200 is compact. In the power expansion process, the electric pile heat box 100 does not need to be stacked along the height direction, the power is easy to expand, welding or other fixing is not needed among the pile tower units 310, the pile tower units are only needed to be pressed and fixed in the electric pile heat box 100, the process is simple, and the assembly is convenient.
The electric pile hot box 100 is partitioned into a plurality of chambers by the pile tower unit group 300. Air enters from the wide-facing side chambers and exits from the wide-facing middle chamber, forming an open cathode gas distribution pattern. The fuel gas pipeline is arranged in the cathode gas cavity and exchanges heat with cathode gas, so that the consistency of the temperature of cathode gas and anode gas is ensured, the influence of the temperature difference of the cathode gas and the anode gas on the fuel cell power generation module is reduced, and the stable operation of the fuel cell power generation module is ensured. And anode gas inlet and outlet pipelines in the first tower stack unit group and the second tower stack unit group are symmetrically distributed, so that uniform distribution of anode gas inlet and outlet is ensured. The cathode heat exchanger and the anode heat exchanger can be arranged at two sides of the electric pile heat box 100, and the number of the cathode heat exchangers can be two so as to adapt to the characteristic of large cathode gas flow and improve the heat utilization rate of tail gas.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. A fuel cell power generation module, characterized by comprising:
A galvanic pile hot box (100); and
A tower stacking module (200) embedded in a box cavity of the electric pile heat box (100) and comprising a plurality of tower stacking unit groups (300) which are arranged at intervals along the width direction (W) of the box, wherein each tower stacking unit group (300) comprises a plurality of tower stacking units (310) which are arranged along the length direction (L) of the box and are sequentially connected in series;
Wherein the box cavity at least comprises a first wide side chamber (1), a wide middle chamber (2) and a second wide side chamber (3) which are formed by separating the pile unit group (300) in the width direction (W) of the box body.
2. The fuel cell power generation module according to claim 1, wherein the electric stack heat tank (100) includes a tank top wall (110), a tank bottom wall (120), and first and second tank long-direction end walls (130, 140) at both ends in the tank length direction (L), the stack tower module (200) includes first and second stack tower cell groups arranged at intervals in the tank width direction (W), the first and second stack tower cell groups extending from the tank bottom wall (120) to the tank top wall (110) and from the first tank long-direction end wall (130) to the second tank long-direction end wall (140), respectively.
3. The fuel cell power generation module according to claim 2, wherein the stack tower unit group (300) includes:
the tower stacking units (310) are sequentially arranged at intervals along the length direction (L) of the box body; and
A heat insulating sealing layer (4) filled between adjacent tower stacking units (310);
Wherein the stack unit (310) includes a stack unit body (3110) stacked on the bottom wall (120) of the case, and a weight block (3120) for gravity pressing the stack unit body (3110), the weight block (3120) being pressed between the top end of the stack unit body (3110) and the top wall (110) of the case.
4. The fuel cell power generation module according to claim 2, wherein the stack unit (310) has electricity taking lugs (5) protruding therefrom.
5. The fuel cell power generation module according to any one of claims 2 to 4, further comprising a cathode gas piping system including:
A cathode gas inlet pipe extending into the first and second wide side chambers (1, 3) respectively; and
And a cathode gas outlet pipe which extends outwards from the wide-direction middle chamber (2).
6. The fuel cell power generation module according to claim 5, wherein the cathode gas piping system further comprises a first cathode heat exchanger (6) and a second cathode heat exchanger (7), the cathode gas inlet piping comprising:
a cathode air inlet main pipe (8) connected to the air inlet end of the first cathode heat exchanger (6) and the air inlet end of the second cathode heat exchanger (7), respectively;
A first cathode inlet sub-pipe (9) extending from an air outlet end of the first cathode heat exchanger (6) and connected to the first wide side chamber (1); and
A second cathode inlet sub-pipe (10) extending from the air outlet end of the second cathode heat exchanger (7) and connected to the second wide-side chamber (3).
7. The fuel cell power generation module of claim 6 wherein the cathode gas outlet conduit comprises:
A first cathode outlet header pipe (11) extending from the wide-direction intermediate chamber (2) and connected to the tail gas inlet end of the first cathode heat exchanger (6) and the tail gas inlet end of the second cathode heat exchanger (7), respectively; and
And a second cathode air outlet main pipeline (12) which extends out from the tail gas outlet end of the first cathode heat exchanger (6) and the tail gas outlet end of the second cathode heat exchanger (7).
8. The fuel cell power generation module according to claim 5, wherein, the fuel cell power generation module further includes an anode gas piping system including:
an anode heat exchanger (13);
An anode gas inlet pipe (14) extending from a gas outlet end of the anode heat exchanger (13) and into the first and second wide side chambers (1, 3); and
An anode gas outlet pipe (15) extends from the wide-direction middle chamber (2) and is connected to the tail gas inlet end of the anode heat exchanger (13).
9. The fuel cell power generation module according to claim 8, wherein the anode gas inlet pipe (14) and the anode gas outlet pipe (15) each include:
A main pipe section extending from the anode heat exchanger (13) and into the tank body of the electric pile heat tank (100); and
A branch pipe section extending from the pipe of the main pipe section and being sequentially connected in parallel by-pass to each of the tower stacking units (310);
Wherein the main pipe section of the anode gas inlet pipe (14) extends into the chamber bottoms of the first and second wide side chambers (1, 3).
10. The fuel cell power generation module according to claim 8, wherein within the tank chamber, the anode gas piping of the first stack unit group and the anode gas piping of the second stack unit group are symmetrically distributed along the widthwise intermediate chamber (2).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103311560A (en) * | 2012-03-16 | 2013-09-18 | 中国科学院宁波材料技术与工程研究所 | Solid oxide fuel cell power generating system and cell stack thereof |
| CN114069009A (en) * | 2020-08-03 | 2022-02-18 | 国家能源投资集团有限责任公司 | Pile power generation module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103311560A (en) * | 2012-03-16 | 2013-09-18 | 中国科学院宁波材料技术与工程研究所 | Solid oxide fuel cell power generating system and cell stack thereof |
| CN114069009A (en) * | 2020-08-03 | 2022-02-18 | 国家能源投资集团有限责任公司 | Pile power generation module |
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