CN111059929A - Novel micro-channel heat exchanger with fin structure - Google Patents
Novel micro-channel heat exchanger with fin structure Download PDFInfo
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- CN111059929A CN111059929A CN201911201087.8A CN201911201087A CN111059929A CN 111059929 A CN111059929 A CN 111059929A CN 201911201087 A CN201911201087 A CN 201911201087A CN 111059929 A CN111059929 A CN 111059929A
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- heat exchange
- cold
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- runner
- hot runner
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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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
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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
- F28F1/38—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 being staggered to form tortuous fluid passages
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a microchannel heat exchanger with a novel fin structure. The invention comprises a plurality of layers of hot runner heat exchange plates and cold runner heat exchange plates, wherein each layer of heat exchange plate is provided with an inlet and an outlet section respectively corresponding to cold and hot fluids and an intermediate heat exchange section, and the intermediate heat exchange section adopts a new separated fin structure. The heat exchanger is integrally formed by arranging heat exchange plates of cold and hot runners in a staggered manner, and cold and hot fluids reversely flow in the heat exchanger for heat exchange. The novel separated fin structure is formed by mixing and staggering fins in two shapes of a concave structure and a convex structure, compared with an airfoil structure and an S-shaped structure which are widely researched, the novel separated fin structure ensures that the sectional area of fluid flowing through the fins is not greatly changed by staggered arrangement of the two different fin structures, the change of the cross section of a flow channel is more gradual, the flow resistance of the fluid in the flowing process is reduced while the heat exchange capacity is ensured, and the energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of microchannel heat exchangers, in particular to a microchannel heat exchanger with a novel fin structure, which has a compact structure and a wide application range and can be used for a high-temperature and high-pressure system.
Background
The microchannel heat exchanger is a compact and efficient heat exchanger, is generally processed by etching, photoetching and the like, a plurality of metal plates are overlapped together through diffusion welding, the materials adopted by the whole structure of the microchannel heat exchanger are consistent, and the heat exchanger cannot deform and fail due to different thermal expansion coefficients of the materials, so that the microchannel heat exchanger can be used for high-temperature and high-pressure systems such as supercritical carbon dioxide Brayton cycle and the like. In the micro-channel heat exchanger, fluid flows in the grooves between the plates and exchanges heat through the wall surfaces of the plates, so that the micro-channel heat exchanger has high heat exchange capacity.
At present, the micro-channel heat exchanger structure is mainly divided into two types, one type is a continuous channel structure and comprises a linear channel and a broken line type channel, and the structure is that a linear or broken line type semicircular groove is processed on the surface of a plate for fluid to flow. The other type is a separated fin structure, such as an S-shaped fin structure and an airfoil fin structure, wherein raised S-shaped fins or airfoil fins are machined on the surface of a plate, and fluid flows among the fins. A large number of researches prove that the heat exchange performance and the flow characteristic of the separated fin structure are superior to those of a continuous channel structure.
The linear micro-channel heat exchanger in the continuous channel structure has a simple structure, and a very thick boundary layer can be formed in the flowing process, so that heat exchange is influenced, and the heat exchange efficiency is reduced. The broken line type channel disturbs the boundary layer to a certain extent due to the existence of the corner, but the violent collision of the fluid at the corner causes a great deal of energy loss. In the microchannel heat exchanger with the separated fin structure, disturbance to fluid is enhanced due to the existence of the fins, so that the heat exchange capability is enhanced, but the flow resistance of the S-shaped fin structure and the airfoil fin structure is still very large, so that very large stress can be generated at the top ends of the fins, and a lot of unnecessary energy loss is caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a microchannel heat exchanger with a novel fin structure.
Because the performance of the microchannel heat exchanger with the separated fin structure is better than that of a continuous channel, the key influencing the performance is the structure of the fins. In order to ensure that the stress borne by the fins and the flow resistance caused by the stress are reduced under the condition of high heat transfer efficiency, the invention provides a novel fin structure, which improves the stress borne by the fins on the basis of ensuring the heat exchange capacity, effectively reduces the flow resistance of the heat exchanger and improves the comprehensive performance of the micro-channel heat exchanger.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
a microchannel heat exchanger with a novel fin structure comprises a plurality of hot runner heat exchange plates and a plurality of cold runner heat exchange plates;
the hot runner heat exchange plates and the cold runner heat exchange plates are arranged in a staggered manner, and cold and hot fluids reversely flow in the hot runner heat exchange plates for heat exchange;
the four corners of the hot runner heat exchange plate and the cold runner heat exchange plate are provided with a hot runner inlet 1, a hot runner outlet 2, a cold runner inlet 3 and a cold runner outlet 4;
the hot runner heat exchange plate also comprises a hot runner inlet section 6, an intermediate heat exchange section and a hot runner outlet section 7; the hot runner inlet 1, the hot runner inlet section 6, the intermediate heat exchange section, the hot runner outlet section 7 and the hot runner outlet 2 are connected in sequence;
the cold runner heat exchange plate also comprises a cold runner inlet section 8, an intermediate heat exchange section and a cold runner outlet section 9; the cold runner inlet 3, the cold runner inlet section 8, the intermediate heat exchange section, the cold runner outlet section 9 and the cold runner outlet 4 are connected in sequence;
the intermediate heat exchange section adopts a separated fin structure; the intermediate heat exchange section comprises a plurality of convex structure fins 10 and concave structure fins 11; the plurality of convex structure fins 10 and the plurality of concave structure fins 11 are arranged in a staggered manner according to line intervals.
On the basis of the technical scheme, the hot runner inlet 1 and the cold runner outlet 4 are arranged at one ends of the hot runner heat exchange plate and the cold runner heat exchange plate, and the hot runner outlet 2 and the cold runner inlet 3 are arranged at the other ends of the hot runner heat exchange plate and the cold runner heat exchange plate.
On the basis of the technical scheme, the hot runner inlet 1 and the hot runner outlet 2, and the cold runner inlet 3 and the cold runner outlet 4 are arranged diagonally.
On the basis of the technical scheme, the hot runner inlet section 6, the hot runner outlet section 7, the cold runner inlet section 8 and the cold runner outlet section 9 are all of gradually-expanding and gradually-reducing structures.
On the basis of the technical scheme, the hot runner heat exchange plate and the cold runner heat exchange plate are processed by methods such as etching, photoetching and the like.
On the basis of the technical scheme, the hot runner heat exchange plate and the cold runner heat exchange plate are overlapped together through diffusion welding, and fluid exchanges heat with the bottom plate through the middle fin structure.
On the basis of the technical scheme, the convex structure fins 10 and the concave structure fins 11 are designed by adopting an arc line from the tail end of the wing to the maximum inscribed circle of the wing on the basis of an NACA airfoil structure.
The invention provides a microchannel heat exchanger with a novel fin structure, wherein the novel fin structure of the microchannel heat exchanger is designed, the novel fin structure is formed by mixing and staggering fins with two shapes of a concave structure and a convex structure, and compared with an airfoil structure and an S-shaped structure which are widely researched, the novel fin structure has the advantages that the cross section of fluid flowing through the fins is not greatly changed by staggering two different fin structures, the cross section of a flow channel is more smoothly changed, the flow resistance of the fluid in the flowing process is reduced while the heat exchange capacity is ensured, and the energy consumption is saved.
Drawings
The invention has the following drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a cold runner heat exchanger plate and a hot runner heat exchanger plate;
FIG. 3 is a schematic view of a fin structure.
Wherein, 1 is hot runner inlet, 2 is hot runner outlet, 3 is cold runner inlet, 4 is cold runner outlet, 5 is the heat transfer board, 6 is hot runner inlet section, 7 is hot runner outlet section, 8 is cold runner inlet section, 9 is cold runner outlet section, 10 is protruding structure fin, 11 is sunken structure fin.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the microchannel heat exchanger with the novel fin structure of the present invention includes a plurality of hot runner heat exchange plates and a plurality of cold runner heat exchange plates;
the hot runner heat exchange plates and the cold runner heat exchange plates are arranged in a staggered manner, and cold and hot fluids reversely flow in the hot runner heat exchange plates for heat exchange;
the four corners of the hot runner heat exchange plate and the cold runner heat exchange plate are provided with a hot runner inlet 1, a hot runner outlet 2, a cold runner inlet 3 and a cold runner outlet 4;
the hot runner heat exchange plate also comprises a hot runner inlet section 6, an intermediate heat exchange section and a hot runner outlet section 7; the hot runner inlet 1, the hot runner inlet section 6, the intermediate heat exchange section, the hot runner outlet section 7 and the hot runner outlet 2 are connected in sequence;
the cold runner heat exchange plate also comprises a cold runner inlet section 8, an intermediate heat exchange section and a cold runner outlet section 9; the cold runner inlet 3, the cold runner inlet section 8, the intermediate heat exchange section, the cold runner outlet section 9 and the cold runner outlet 4 are connected in sequence;
the intermediate heat exchange section adopts a separated fin structure; the intermediate heat exchange section comprises a plurality of convex structure fins 10 and concave structure fins 11; the plurality of convex structure fins 10 and the plurality of concave structure fins 11 are arranged in a staggered manner according to line intervals.
On the basis of the technical scheme, the hot runner inlet 1 and the cold runner outlet 4 are arranged at one ends of the hot runner heat exchange plate and the cold runner heat exchange plate, and the hot runner outlet 2 and the cold runner inlet 3 are arranged at the other ends of the hot runner heat exchange plate and the cold runner heat exchange plate.
On the basis of the technical scheme, the hot runner inlet 1 and the hot runner outlet 2, and the cold runner inlet 3 and the cold runner outlet 4 are arranged diagonally.
On the basis of the technical scheme, the hot runner inlet section 6, the hot runner outlet section 7, the cold runner inlet section 8 and the cold runner outlet section 9 are all of gradually-expanding and gradually-reducing structures.
On the basis of the technical scheme, the hot runner heat exchange plate and the cold runner heat exchange plate are processed by methods such as etching, photoetching and the like.
On the basis of the technical scheme, the hot runner heat exchange plate and the cold runner heat exchange plate are overlapped together through diffusion welding, and fluid exchanges heat with the bottom plate through the middle fin structure.
On the basis of the technical scheme, the convex structure fins 10 and the concave structure fins 11 are designed by adopting an arc line from the tail end of the wing to the maximum inscribed circle of the wing on the basis of an NACA airfoil structure.
Compared with the prior art, the novel fin structure is formed by mixing and staggering the fins in the shapes of the concave structure and the convex structure, so that the sectional area of fluid flowing through the fins is not greatly changed, the change of the cross section of a flow channel is more gradual, the flow resistance of the fluid in the flowing process is reduced while the heat exchange capacity is ensured, and the energy consumption is saved.
Compared with the wing-shaped structure and the S-shaped structure which are widely researched, the fin structure of the micro-channel heat exchanger has the advantages that the two different fin structures are arranged in a staggered mode, the cross-sectional area change of a flow channel is small, the resistance of flow can be greatly reduced while the heat exchange performance is kept, and the energy consumption is saved.
Those not described in detail in this specification are within the skill of the art.
Claims (7)
1. A microchannel heat exchanger with a novel fin structure is characterized by comprising a plurality of hot runner heat exchange plates and a plurality of cold runner heat exchange plates; the hot runner heat exchange plates and the cold runner heat exchange plates are arranged in a staggered manner;
the four corners of the hot runner heat exchange plate and the cold runner heat exchange plate are provided with a hot runner inlet (1), a hot runner outlet (2), a cold runner inlet (3) and a cold runner outlet (4);
the hot runner heat exchange plate also comprises a hot runner inlet section (6), an intermediate heat exchange section and a hot runner outlet section (7); the hot runner inlet (1), the hot runner inlet section (6), the intermediate heat exchange section, the hot runner outlet section (7) and the hot runner outlet (2) are connected in sequence;
the cold runner heat exchange plate also comprises a cold runner inlet section (8), an intermediate heat exchange section and a cold runner outlet section (9); the cold runner inlet (3), the cold runner inlet section (8), the intermediate heat exchange section, the cold runner outlet section (9) and the cold runner outlet (4) are connected in sequence;
the intermediate heat exchange section adopts a separated fin structure; the intermediate heat exchange section comprises a plurality of convex structure fins (10) and concave structure fins (11); the plurality of convex structure fins (10) and the plurality of concave structure fins (11) are arranged in a staggered mode according to line intervals.
2. The microchannel heat exchanger with the novel fin structure as claimed in claim 1, wherein the hot runner inlet (1) and the cold runner outlet (4) are arranged at one end of the hot runner heat exchange plate and the cold runner heat exchange plate, and the hot runner outlet (2) and the cold runner inlet (3) are arranged at the other end of the hot runner heat exchange plate and the cold runner heat exchange plate.
3. The microchannel heat exchanger with the novel fin structure as claimed in claim 2, wherein the hot runner inlet (1) and the hot runner outlet (2), and the cold runner inlet (3) and the cold runner outlet (4) are arranged diagonally.
4. The microchannel heat exchanger with the novel fin structure as claimed in claim 1, wherein the hot runner inlet section (6), the hot runner outlet section (7), the cold runner inlet section (8) and the cold runner outlet section (9) are all in a gradually expanding and gradually reducing structure.
5. The microchannel heat exchanger with novel fin structures as claimed in claim 1, wherein the hot runner heat exchange plate and the cold runner heat exchange plate are both formed by etching or photolithography.
6. The microchannel heat exchanger with novel fin structure as claimed in claim 1, wherein the hot runner heat exchange plate and the cold runner heat exchange plate are stacked together by diffusion welding.
7. The microchannel heat exchanger with novel fin structure as claimed in claim 1, wherein the fins (10) with convex structure and the fins (11) with concave structure are designed according to the arc from the tail end of the wing to the maximum inscribed circle of the wing based on the NACA airfoil structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201087.8A CN111059929A (en) | 2019-11-29 | 2019-11-29 | Novel micro-channel heat exchanger with fin structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911201087.8A CN111059929A (en) | 2019-11-29 | 2019-11-29 | Novel micro-channel heat exchanger with fin structure |
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| Publication Number | Publication Date |
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| CN111059929A true CN111059929A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911201087.8A Pending CN111059929A (en) | 2019-11-29 | 2019-11-29 | Novel micro-channel heat exchanger with fin structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114111393A (en) * | 2021-11-24 | 2022-03-01 | 中国石油大学(华东) | Heat exchange plate, core and printed circuit board heat exchanger based on supercritical working medium |
| CN114577041A (en) * | 2022-03-09 | 2022-06-03 | 内蒙古农业大学 | Micro-channel heat exchange panel and heat exchanger |
| CN115218710A (en) * | 2022-09-08 | 2022-10-21 | 中国核动力研究设计院 | Heat exchange component, heat exchange core and heat exchange device |
| CN116642353A (en) * | 2023-07-24 | 2023-08-25 | 中国核动力研究设计院 | Current collecting structure, heat exchange core and heat exchanger |
| CN117628946A (en) * | 2024-01-23 | 2024-03-01 | 中国核动力研究设计院 | Heat exchanger and heat exchange system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114111393A (en) * | 2021-11-24 | 2022-03-01 | 中国石油大学(华东) | Heat exchange plate, core and printed circuit board heat exchanger based on supercritical working medium |
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| CN114577041A (en) * | 2022-03-09 | 2022-06-03 | 内蒙古农业大学 | Micro-channel heat exchange panel and heat exchanger |
| CN114577041B (en) * | 2022-03-09 | 2024-03-22 | 内蒙古农业大学 | Microchannel heat exchange panel and heat exchanger |
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| CN116642353A (en) * | 2023-07-24 | 2023-08-25 | 中国核动力研究设计院 | Current collecting structure, heat exchange core and heat exchanger |
| CN116642353B (en) * | 2023-07-24 | 2023-10-24 | 中国核动力研究设计院 | Current collecting structure, heat exchange core and heat exchanger |
| CN117628946A (en) * | 2024-01-23 | 2024-03-01 | 中国核动力研究设计院 | Heat exchanger and heat exchange system |
| CN117628946B (en) * | 2024-01-23 | 2024-04-05 | 中国核动力研究设计院 | Heat exchanger and heat exchange system |
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