CN117570764A - Heat exchanger for preheating air side of fuel cell and application thereof - Google Patents
Heat exchanger for preheating air side of fuel cell and application thereof Download PDFInfo
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- CN117570764A CN117570764A CN202311540212.4A CN202311540212A CN117570764A CN 117570764 A CN117570764 A CN 117570764A CN 202311540212 A CN202311540212 A CN 202311540212A CN 117570764 A CN117570764 A CN 117570764A
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- 239000000446 fuel Substances 0.000 title claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 227
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000010146 3D printing Methods 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000005192 partition Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 6
- 230000001965 increasing effect Effects 0.000 abstract description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000003546 flue gas Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000003466 welding Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
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- 238000009827 uniform distribution Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/16—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion
- F28F1/18—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being integral with the element, e.g. formed by extrusion the element being built-up from finned sections
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Fluid Mechanics (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a heat exchanger for preheating an air side of a fuel cell and application thereof, and belongs to the technical field of high-temperature flue gas heat exchange. The invention discloses a heat exchanger for preheating the air side of a fuel cell, which mainly comprises a heat exchanger hot core and a cold-hot fluid flow dividing device, wherein the heat exchanger hot core is respectively provided with a cold fin channel and a hot fin channel, cold-hot fluid flows through the corresponding cold-hot fluid flow dividing device and is uniformly distributed into the cold fin channel and the hot fin channel in the heat exchanger hot core to exchange heat, and after gas-gas heat exchange is completed under the action of the cold fin channel and the hot fin channel, the cold-hot fluid flows into a subsequent experimental device through a guide vane and an end enclosure in a converging way. The cold fluid diversion device and the hot fluid diversion device provided by the invention prevent the contact of the fluid pipeline from affecting the actual heat exchange performance. The heat exchange device is suitable for high-temperature gas heat exchange, and because the difference of the heat convection coefficients of two fluids is small, the heat convection area is effectively increased on the premise of ensuring small flow resistance by adopting the straight porous structure fins.
Description
Technical Field
The invention belongs to the technical field of high-temperature flue gas heat exchange, and particularly relates to a heat exchanger for preheating an air side of a fuel cell and application of the heat exchanger.
Background
The fuel cell is a novel power generation technology with high energy conversion rate. Unlike traditional thermal power generation, the fuel cell directly converts chemical energy stored in fuel into electric energy through electrochemical reaction, and the process not only effectively solves the problem of high energy loss caused by multiple energy conversion in the thermal power generation process, but also successfully realizes low-carbon and zero-sulfur oxide and nitrogen oxide emission. Fuel cells are known as the most likely new energy technology to replace traditional automotive power sources. In a fuel cell system, the design of the air supply system is related to the operation performance of the entire cell system. The heat exchanger is used as an important component of the air supply system, and the heat exchanger is used for realizing heat exchange between low-temperature air and high-temperature waste gas, so that the purposes of heating the air and efficiently utilizing the energy of the system are achieved. The working temperature of the hundred kilowatt fuel cell can reach 800-900 ℃ at most, and the too low air temperature can influence the electrochemical reaction rate and the reaction degree of the cell, thereby influencing the power generation efficiency of the cell; too high an air temperature may cause damage to the cell structure and cause an irreversible effect on the fuel cell system. The traditional manufacturing process of heat exchangers is milling, drilling and welding casting, and its limitations prevent the development of geometrically complex heat sinks that can utilize topology aspects to enhance thermal performance. In the welding process, the welding joint is not completely welded, and the welding joint is not subjected to flaw detection and explosion test, so that the welding joint can leak or generate fatigue fracture, and a large amount of inflammable and explosive fluid overflows to explode. In addition, the assembled processing heat exchanger can cause a series of problems such as flange leakage, uneven fluid flow, reduced heat exchange efficiency of the heat exchanger and the like due to bolt elongation and loosening of fastening parts caused by the increase of the operating temperature. Therefore, how to heat the low-temperature air to a proper temperature is one of the key problems of the current fuel cell system design, and designing a heat exchanger suitable for preheating the air of the hundred kilowatt fuel cell system becomes a necessity.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a heat exchanger for preheating the air side of a fuel cell and application thereof, which are used for solving the problems of the prior art that the heat exchanger is not compact in structure, has general heat exchange efficiency, and is uneven in fluid distribution.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
the invention discloses a heat exchanger for preheating the air side of a fuel cell, which comprises a cold fluid inlet and a flow dividing device, a hot fluid inlet and a flow dividing device, a heat core of the heat exchanger, a cold fluid outlet and a flow converging device, and a hot fluid outlet and a flow converging device; a cold fin channel and a hot fin channel are arranged in the heat core of the heat exchanger; the cold fin channels and the hot fin channels are arranged in a penetrating way;
cold and hot fluid respectively passes through the cold fluid inlet and the flow dividing device and the hot fluid inlet and the flow dividing device through pipelines to generate divided cold fluid and divided hot fluid;
the split cold fluid and the split hot fluid are communicated with the heat core of the heat exchanger through pipelines, and are respectively subjected to heat exchange through the cold fin channels and the hot fin channels, and are respectively discharged from the cold fluid outlet and the converging device and the hot fluid outlet and the converging device after heat exchange. Further, the heat exchanger heat core further comprises an upper cover plate and a lower cover plate; the cold fin channels and the hot fin channels are arranged between the upper cover plate and the lower cover plate in a penetrating way;
the cold fin channels and the hot fin channels are arranged alternately in such a way that two hot fin channels are interposed between every two cold fin channels.
Further, the cold fin channel is formed by sequentially arranging a plurality of cold fin channel units; the cold fin channel unit comprises a plurality of cold fluid ribs, a cold fluid channel and a cold fluid separator; cold fluid channels are formed among the plurality of cold fluid ribs; the cold fluid separator is used for separating different cold fin channels; the cold fluid fin has a flat porous structure.
Further, the heat fin channel is formed by sequentially arranging a plurality of heat fin channel units; the hot fin channel unit comprises a plurality of hot fluid ribs, a hot fluid channel and a hot fluid separator; a hot fluid channel is formed among the plurality of hot fluid fins; the thermal fluid separator is used for separating different heat fin channels; the thermal fluid rib has a flat porous structure.
Further, the cross-sectional shapes of the cold fluid channel and the hot fluid channel are rectangular.
Further, the cold fluid inlet and the flow dividing device comprise a plurality of cold fluid guide plates and cold fluid sealing heads; each cold fluid guide vane is connected with one cold fluid seal head; the cold fluid inlet and the diversion device are respectively connected with the cold fluid guide vane and the cold fluid seal head in sequence through pipelines to form a plurality of bundles of diverted cold fluid, and the bundles of diverted cold fluid are connected with the cold fin channels through pipelines.
Further, the hot fluid inlet and the flow dividing device comprise a plurality of hot fluid guide plates and cold fluid seal heads; each hot fluid guide vane is connected with one hot fluid seal head; the hot fluid inlet and the flow dividing device are respectively connected with the hot fluid guide plate and the hot fluid seal head in sequence through pipelines to form a plurality of bundles of divided hot fluids, and the bundles of divided hot fluids are connected with the hot fin channels through the pipelines.
Further, the direction of the cold fluid introduced through the cold fluid inlet and the flow dividing device is perpendicular to the direction of the hot fluid introduced through the hot fluid inlet and the flow dividing device;
when the fluid flows reversely, the cold fluid inlet and the flow dividing device and the cold fluid outlet and the converging device can be exchanged;
the heat exchanger is prepared by adopting a 3D printing additive manufacturing method, and the material is stainless steel.
Further, the heat exchanger for preheating the air side of the fuel cell comprises a cold fluid converging device and a hot fluid converging device; the split cold fluid and the split hot fluid are communicated with a heat core of the heat exchanger through pipelines, exchange heat through the cold fin channels and the hot fin channels respectively, and are discharged from a cold fluid outlet and a hot fluid outlet after being converged through a cold fluid converging device and a hot fluid converging device respectively after exchanging heat;
the cold fin channels and the hot fin channels employ dovetail seals.
The invention also discloses application of the heat exchanger for preheating the air side of the fuel cell, wherein the heat exchanger for preheating the air side of the fuel cell is used as a heat exchanger of a hundred kilowatt-level fuel cell system.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a heat exchanger for preheating the air side of a fuel cell, which mainly comprises a heat exchanger hot core and a cold-hot fluid flow dividing device, wherein the heat exchanger hot core is respectively provided with a cold fin channel and a hot fin channel, cold-hot fluid flows through the corresponding cold-hot fluid flow dividing device and is uniformly distributed into the cold fin channel and the hot fin channel in the heat exchanger hot core to exchange heat, and after the gas-gas heat exchange is completed under the action of the cold fin channel and the hot fin channel, the cold-hot fluid flows into a subsequent experimental device through a guide vane and an end socket in a converging way. The cold fluid diversion device and the hot fluid diversion device provided by the invention prevent the contact of the fluid pipeline from affecting the actual heat exchange performance.
Furthermore, the cold fluid flow dividing device and the hot fluid flow dividing device adopted by the invention can adopt the flow mode of the same-direction flow or the reverse flow, and the flow dividing pipe and the flow collecting pipe are arranged in the center of the flow dividing device, so that the uniform distribution of the fluid can be realized, the heat exchanger can obtain better heat exchange effect, and the heat transfer is enhanced.
Furthermore, the cover plates are arranged at the upper end and the lower end of the heat core of the heat exchanger, so that the heat core main body is effectively prevented from being contacted with the external environment, unnecessary heat exchange of the heat core is avoided, and the heat exchange effect is improved.
Furthermore, the fins of the invention adopt dovetail seals, which can effectively collect fluid and tightly connect the plate bundles with the process pipeline; the hot core fin combination formed by the cold fin channels and the hot fin channels takes the two cold fluid fin channels mixed with the two hot fluid fin channels as a basic unit, the fin combination structure is regularly symmetrical, the uniformity of fluid flow and temperature field distribution is facilitated, and the field synergistic effect is realized, so that the heat transfer effect is enhanced.
Furthermore, the invention adopts a 3D printing additive manufacturing technology, which is different from the welding mode adopted by the traditional heat exchanger processing, and the technology is a processing mode with higher precision, can integrally form the heat exchanger parts, effectively solves the sealing problem of the heat exchanger manufactured by welding processing at high temperature, and is a big bright point of the invention.
The invention also discloses application of the heat exchanger preheated by the air side of the fuel cell as a heat exchanger of a hundred kilowatt-level fuel cell system, and the heat exchanger is suitable for gas-gas heat exchange, and because the difference of the heat convection coefficients between two fluids is smaller, the heat exchanger adopts straight porous fins, thereby effectively increasing the heat convection area under the premise of having smaller flow resistance, and being suitable for heat exchange of the heat exchanger of the hundred kilowatt-level fuel cell system.
Drawings
FIG. 1 is an overall block diagram of a heat exchanger for preheating the air side of a fuel cell in accordance with the present invention;
FIG. 2 is a block diagram of a heat exchanger of the invention with the air side of the fuel cell preheated;
wherein: a-front view; b-top view; c-partial cross-sectional view;
FIG. 3 is a schematic view of the overall structure of the heat exchanger heat core of the present invention;
FIG. 4 is a schematic two-dimensional view of a heat fin channel according to the invention;
FIG. 5 is a schematic two-dimensional view of a heat fin channel unit of the present invention;
FIG. 6 is a schematic two-dimensional view of a cold fin channel of the present invention;
FIG. 7 is a schematic two-dimensional view of a cold fin channel unit of the present invention;
wherein: 1-a cold fluid inlet and a flow splitting device; 2-a hot fluid inlet and a flow splitting device; 3-cold fluid outlet and converging means; 4-a hot fluid outlet and a converging device; 5-a lower cover plate; 6-an upper cover plate; 7-a thermal fluid separator; 8-thermal fluid ribs; 9-a thermal fluid channel; 10-cold fluid separator; 11-a cold fluid channel; 12-cold fluid fins; 13-heat exchanger heat core.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The invention discloses a heat exchanger for preheating the air side of a fuel cell, which is a plate-fin heat exchanger and comprises a cold fluid inlet and a flow dividing device 1, a hot fluid inlet and a flow dividing device 2, a heat core 13 of the heat exchanger, a cold fluid outlet and flow converging device 3 and a hot fluid outlet and flow converging device 4; the heat exchanger heat core 13 is internally provided with a cold fin channel and a hot fin channel, and the upper part and the lower part are respectively provided with an upper cover plate 6 and a lower cover plate 5; cold and hot fluid respectively flows through the corresponding cold fluid diversion device and the hot fluid diversion device, and is evenly distributed into the heat core 3 of the heat exchanger for heat exchange; the upper cover plate 6 and the lower cover plate 5 (pseudo fin layers) are arranged on the upper side and the lower side of the heat core 13 of the heat exchanger, and cold and hot channel fin combinations formed by cold fin channels and hot fin channels in a penetrating mode are arranged between the upper cover plate 6 and the lower cover plate 5. Cold and hot fluid respectively flows through the cold fluid inlet and flow dividing device 1 and the hot fluid inlet and flow dividing device 2, respectively enters the cold fin channels and the hot fin channels, and after gas-gas heat exchange is completed under the fin action, the cold fluid enters the subsequent experimental device through the cold fluid outlet and flow converging device 3 and the hot fluid outlet and flow converging device 4 (comprising guide sheets and sealing heads).
The diversion device adopted by the invention is respectively provided with two different structures of a cold fluid diversion device and a hot fluid diversion device aiming at cold and hot fluids, so that the contact of fluid pipelines is prevented from influencing the actual heat exchange performance; the flow mode of the same-direction flow or reverse flow can be adopted, the split pipe and the collecting pipe are arranged at the center of the cold-hot split device, the uniform distribution of the fluid can be realized, the heat exchanger can obtain better heat exchange effect, and the heat transfer is enhanced.
Preferably, the upper cover plate 6 and the lower cover plate 5 are adopted to effectively prevent the heat core main body from contacting with the external environment, thereby avoiding unnecessary heat exchange of the heat core and improving the heat exchange effect.
Preferably, the fins are dovetail seals that effectively collect fluid and tightly connect the plate bundle to the process piping.
The heat exchanger for preheating the air side of the fuel cell is suitable for gas-gas heat exchange, and because the difference of the convection heat exchange coefficients between two fluids is small, the heat exchanger adopts straight porous fins, thereby effectively increasing the convection heat exchange area on the premise of having small flow resistance.
The heat core fin combination takes two cold fluid fin channels and two hot fluid fin channels as basic units, the fin combination structure is regularly symmetrical, the uniformity of fluid flow and temperature field distribution is facilitated, and the field synergistic effect is realized, so that the heat transfer effect is enhanced.
The heat exchanger adopts a 3D printing additive manufacturing technology, is different from the welding mode adopted by the traditional heat exchanger processing, is a processing mode with higher precision, can integrally form heat exchanger parts, and effectively solves the sealing problem of the heat exchanger manufactured by welding processing at high temperature.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1 and 2, the invention discloses a heat exchanger for preheating the air side of a fuel cell, which comprises a cold fluid inlet and flow dividing device 1, a hot fluid inlet and flow dividing device 2, a heat exchanger hot core 13, a cold fluid outlet and flow converging device 3 and a hot fluid outlet and flow converging device 4; a cold fin channel and a hot fin channel are arranged in the heat exchanger heat core 13; the cold fin channels and the hot fin channels are arranged in a penetrating way; as shown in FIG. 1, there are 10 hot fin channels and 5 cold fin channels, and in use, the hot fluid is in the form of direct forward inflow and outflow tubes and the cold fluid is in the form of lateral inflow and outflow tubes; the hot fluid flows in from the hot fluid inlet and the flow dividing device 2, is divided into 10 bundles of fluid through the guide vane and the end enclosure, enters the hot fin channels in the heat core 13 of the heat exchanger for heat exchange, and flows out from the hot fluid outlet and the flow converging device 4 through the flow guide vane and the end enclosure for converging; similarly, cold fluid flows in from the cold fluid inlet and the flow dividing device 1, is divided into 5 bundles of fluid through the guide vane and the end enclosure, enters the cold fin channels in the heat core 13 of the heat exchanger for heat exchange, is converged through the guide vane and the end enclosure, and flows out from the cold fluid outlet and the converging device 3; the cold fluid inlet and the flow dividing device 1 and the cold fluid outlet and the converging device 3 can be exchanged in the reverse flow.
The schematic structural diagram of the heat exchanger core component-heat exchanger heat core 13 of the whole heat exchanger is shown in fig. 3, and an upper cover plate 6 and a lower cover plate 5 are arranged at the upper end and the lower end of the heat core to prevent the heat exchange between the cold and hot fin channels and the outside; the split cold and hot fluid exchanges heat in the cold fin channel and the hot fin channel, the heat exchange area is increased under the fin effect, and the heat exchange effect of the heat exchanger is enhanced. The cross-sections of the cold fin channels and the hot fin channels are shown in fig. 4 and 6.
When a cold and hot fluid enters the cold and hot fin channels, the channel shape through which the fluid flows is different due to the different fluid fin configurations.
FIG. 5 is a schematic view of a heat fin channel unit comprising a number of heat fluid fins 8, heat fluid channels 9 and heat fluid separators 7; thermal fluid channels 9 are formed among the thermal fluid ribs 8; the thermal fluid barrier 7 serves to separate the different heat fin channels. The thermal fluid separator 7 is arranged in the heat exchanger and used for separating two adjacent different fins and preventing fluid from flowing into other fins; the thermal fluid rib 8 is used for increasing the heat exchange area and enhancing the fluid heat transfer, and meanwhile, the flat porous structure is adopted to accelerate the heat transfer efficiency and reduce the flow resistance; the hot fluid channel 9 is a channel shape through which the hot fluid flows, and its cross-sectional shape is rectangular.
FIG. 7 is a schematic view of a cold fin channel unit comprising several cold fluid fins 12, cold fluid channels 11 and cold fluid baffles 10; cold fluid channels 11 are formed among the plurality of cold fluid ribs 12; the cold fluid separator plate 10 serves to separate the different cold fin passages. The cold fluid separator 10 is used for separating two adjacent different fins and preventing fluid from flowing into other fins; the cold fluid fins 12 are used for increasing the heat exchange area and strengthening the heat transfer of the fluid, and meanwhile, the flat porous structure is adopted to accelerate the heat transfer efficiency and reduce the flow resistance; the cold fluid passage 11 is a passage shape through which cold fluid flows, and has a rectangular cross-sectional shape. Because the composition of the cold and hot fluids is different, the physical parameters are also different, so that the fin structures of different fluids of the heat exchanger are different in fin thickness and channel geometric dimension.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
1. The heat exchanger for preheating the air side of the fuel cell is characterized by comprising a cold fluid inlet and a flow dividing device (1), a hot fluid inlet and a flow dividing device (2), a heat exchanger hot core (13), a cold fluid outlet and converging device (3) and a hot fluid outlet and converging device (4); a cold fin channel and a hot fin channel are arranged in the heat exchanger hot core (13); the cold fin channels and the hot fin channels are arranged in a penetrating way;
cold and hot fluid respectively passes through the cold fluid inlet and distribution device (1) and the hot fluid inlet and distribution device (2) through pipelines to generate distributed cold fluid and distributed hot fluid;
the split cold fluid and the split hot fluid are communicated with a heat core (13) of the heat exchanger through pipelines, heat exchange is carried out through the cold fin channels and the hot fin channels respectively, and after the heat exchange is carried out, the cold fluid is discharged from the cold fluid outlet and converging device (3) and the hot fluid outlet and converging device (4) respectively.
2. A heat exchanger for preheating the air side of a fuel cell in accordance with claim 1, wherein the heat exchanger heat core (13) further comprises an upper cover
A plate (6) and a lower cover plate (5); the cold fin channels and the hot fin channels are arranged between the upper cover plate (6) and the lower cover plate (5) in a penetrating way;
the cold fin channels and the hot fin channels are arranged alternately in such a way that two hot fin channels are interposed between every two cold fin channels.
3. A heat exchanger for preheating the air side of a fuel cell according to claim 1, wherein the cold fin passage is composed of a plurality of cold fin passage units arranged in sequence; the cold fin channel unit comprises a plurality of cold fluid ribs (12), a cold fluid channel (11) and a cold fluid separator (10); cold fluid channels (11) are formed among the plurality of cold fluid ribs (12); the cold fluid separator (10) is used for separating different cold fin channels; the cold fluid fin (12) has a flat porous structure.
4. A fuel cell air side preheated heat exchanger as recited in claim 3, wherein the heat fin channel is comprised of a plurality of heat fin channel units arranged in sequence; the hot fin channel unit comprises a plurality of hot fluid ribs (8), a hot fluid channel (9) and a hot fluid partition plate (7); a hot fluid channel (9) is formed among the plurality of hot fluid ribs (8); the thermal fluid separator (7) is used for separating different heat fin channels; the thermal fluid rib (8) has a flat porous structure.
5. A heat exchanger for air side preheating of a fuel cell according to claim 4, wherein the cross-sectional shape of both the cold fluid channel (11) and the hot fluid channel (9) is rectangular.
6. A heat exchanger for preheating the air side of a fuel cell according to claim 5, wherein the cold fluid inlet and splitting means (1) comprises a number of cold fluid deflectors and cold fluid heads; each cold fluid guide vane is connected with one cold fluid seal head; the cold fluid inlet and the diversion device (1) are respectively connected with the cold fluid guide vane and the cold fluid seal head in sequence through pipelines to form a plurality of bundles of diverted cold fluids, and the cold fluids after the bundles of diverted cold fluids are connected with the cold fin channels through pipelines.
7. A heat exchanger for preheating the air side of a fuel cell according to claim 5, wherein the hot fluid inlet and splitting means (2) comprises a plurality of hot fluid deflectors and cold fluid heads; each hot fluid guide vane is connected with one hot fluid seal head; the hot fluid inlet and the flow dividing device (2) are respectively connected with the hot fluid guide plate and the hot fluid seal head in sequence through pipelines to form a plurality of bundles of divided hot fluids, and the bundles of divided hot fluids are connected with the hot fin channels through the pipelines.
8. A heat exchanger for preheating the air side of a fuel cell according to claim 1, wherein the direction of introduction of the cold fluid through the cold fluid inlet and the flow dividing means (1) is perpendicular to the direction of introduction of the hot fluid through the hot fluid inlet and the flow dividing means (2);
the cold fluid inlet and the flow dividing device (1) and the cold fluid outlet and the converging device (3) can be exchanged when the fluid flows reversely;
the heat exchanger is prepared by adopting a 3D printing additive manufacturing method, and the material is stainless steel.
9. A fuel cell air side preheated heat exchanger as recited in claim 1 wherein the cold and hot fin channels employ dovetail seals.
10. Use of a heat exchanger for preheating the air side of a fuel cell according to claim 1, wherein the heat exchanger for preheating the air side of a fuel cell is used as a heat exchanger for a hundred kw-level fuel cell system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311540212.4A CN117570764A (en) | 2023-11-17 | 2023-11-17 | Heat exchanger for preheating air side of fuel cell and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311540212.4A CN117570764A (en) | 2023-11-17 | 2023-11-17 | Heat exchanger for preheating air side of fuel cell and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117570764A true CN117570764A (en) | 2024-02-20 |
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ID=89863776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311540212.4A Pending CN117570764A (en) | 2023-11-17 | 2023-11-17 | Heat exchanger for preheating air side of fuel cell and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117570764A (en) |
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2023
- 2023-11-17 CN CN202311540212.4A patent/CN117570764A/en active Pending
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