CN118258244A - Microchannel plate type particle heat exchanger - Google Patents
Microchannel plate type particle heat exchanger Download PDFInfo
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- CN118258244A CN118258244A CN202211690475.9A CN202211690475A CN118258244A CN 118258244 A CN118258244 A CN 118258244A CN 202211690475 A CN202211690475 A CN 202211690475A CN 118258244 A CN118258244 A CN 118258244A
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- heat exchange
- guide
- heat exchanger
- exchange plates
- plate type
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- 239000002245 particle Substances 0.000 title abstract description 51
- 239000012530 fluid Substances 0.000 claims abstract description 16
- 230000007423 decrease Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a microchannel plate type particle heat exchanger, comprising: a heat exchanger housing and a heat exchange core; the heat exchange core body comprises: the heat exchange plates are arranged in parallel at intervals along a first direction which horizontally extends, a plurality of fluid channels are formed in the heat exchange plates, a plurality of guide strips are arranged at gaps between two adjacent heat exchange plates, and the guide strips between the two adjacent heat exchange plates are arranged at intervals along a second direction which horizontally extends and is perpendicular to the first direction so as to form a plurality of guide channels between the two heat exchange plates; the difference between the diameters of the outlet and the inlet of the guide channel between two adjacent heat exchange plates is inversely proportional to the distance between the middle parts of the heat exchange plates corresponding to the distance between the guide channels. According to the microchannel plate type particle heat exchanger provided by the invention, the guide strips arranged between the heat exchange plates enable the flow velocity and the heat exchange effect of particles at each position between the two heat exchange plates to be consistent, so that the temperature of the particles in the heat exchanger shell is more balanced and stable.
Description
Technical Field
The invention belongs to the technical field of heat exchangers, and particularly relates to a microchannel plate type particle heat exchanger.
Background
The microchannel plate type particle heat exchanger has compact structure and strong pressure resistance, and can be used for heat exchange between particle media and high-pressure fluid media such as supercritical carbon dioxide. In the existing microchannel plate type particle heat exchanger, a particle side channel adopts a structure form of a flat cavity, and particle media flow from top to bottom in the flat cavity under the action of gravity self-driving. However, in actual operation, the temperature of the particles in the equipment cavity is found to be unstable, so that all operation parameters of the whole system are unstable.
Disclosure of Invention
The invention provides a microchannel plate type particle heat exchanger which solves the technical problems, and specifically adopts the following technical scheme:
a microchannel plate type particulate heat exchanger comprising:
A heat exchanger housing formed with an inlet port and an outlet port;
the heat exchange core body is arranged in the heat exchanger shell;
the heat exchange core comprises:
The heat exchange plates are arranged at intervals in parallel along a first direction extending horizontally, a plurality of fluid channels are formed in the heat exchange plates, a plurality of guide strips are arranged at gaps between two adjacent heat exchange plates, and the guide strips between the two adjacent heat exchange plates extend along a second direction perpendicular to the first direction at intervals so as to form a plurality of guide channels between the two heat exchange plates;
The difference between the diameters of the outlet and the inlet of the guide channel between two adjacent heat exchange plates is inversely proportional to the distance between the middle parts of the heat exchange plates corresponding to the distance between the guide channels.
Further, the apertures of the inlets of the plurality of guide channels between two adjacent heat exchange plates are the same and the apertures of the outlets of the plurality of guide channels gradually decrease in a direction away from the middle of the corresponding heat exchange plate.
Further, the guide strips of the plurality of guide strips between two adjacent heat exchange plates, which are positioned in the middle of the heat exchange plates, are vertically arranged, and the inclination angles of the guide strips positioned on two sides of the vertically arranged guide strips in the middle of the heat exchange plates in the direction away from the middle of the corresponding heat exchange plates are gradually increased.
Further, the guide strips on two sides of the guide strip which are vertically arranged in the middle of the heat exchange plate are symmetrically distributed relative to the guide strip which is vertically arranged in the middle.
Further, the guide bars on both sides farthest from the vertically arranged guide bars in the middle of the heat exchange plate are also vertically arranged.
Further, in the first direction, the apertures of the inlets of the guide channels of different levels gradually decrease in a direction away from the middle of the heat exchange core.
Further, at least one of the two sides of the guide bar forming the guide channel is recessed inward.
Further, the guide strip is a metal strip.
Further, a plurality of fluid channels in the heat exchange plate are arranged in parallel at intervals.
Further, a number of the fluid channels within the heat exchanger plate extend along the second direction.
The microchannel plate type particle heat exchanger has the advantages that the guide strips arranged between the heat exchange plates enable the flow velocity and the heat exchange effect of particles at each position between the two heat exchange plates to be consistent, so that the temperature of the particles in the heat exchanger shell is more balanced and stable.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the application, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art microchannel plate type particulate heat exchanger;
FIG. 2 is a schematic view of a microchannel plate type particulate heat exchanger of the present invention;
FIG. 3 is a schematic illustration of a heat exchange core of a microchannel plate type particulate heat exchanger of the present invention;
FIG. 4 is a cross-sectional view of the heat exchange core of FIG. 3;
FIG. 5 is a schematic view of a guide strip of a microchannel plate type particulate heat exchanger of the present invention;
FIG. 6 is a schematic view of another view of a guide bar of a microchannel plate type particulate heat exchanger of the present invention;
The heat exchanger includes a heat exchanger housing 10, an inlet 11, an outlet 12, a heat exchange core 20, a heat exchange plate 21, a fluid passage 211, a guide bar 22, a guide passage 23, an outlet 231, and an inlet 232.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present application and should not be construed as limiting the application.
In the description of the present application, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Fig. 1 is a schematic structural diagram of a conventional microchannel plate type particle heat exchanger, and the particle side channels adopt a structural form of a flat cavity. Through research, it is found that in the microchannel plate type particle heat exchanger, in actual operation, particles can flow unevenly in a cavity of the device, so that an interface of the particles in the drawing shows a concave shape. The uneven flow is mainly caused by the fact that the directions of the upper and lower feed inlets and the direction of gravity flow of particles are consistent, so that the particles inevitably flow faster on the vertical line where the feed inlets and the discharge outlets are located. This flow non-uniformity in turn will cause non-uniformity in heat transfer, resulting in non-uniformity in the temperature of the heat exchanger outlet particles. And because the particle medium has poor heat conduction capability, unlike the fluid medium, the particle medium can be easily mixed with temperature, so that the particle temperature of the rear end of the heat exchanger and the whole system is unstable, and all operation parameters of the whole system are influenced to be unstable.
The present application proposes an improved microchannel plate type particle heat exchanger, as shown in fig. 2, comprising: a heat exchanger housing 10 and a heat exchange core 20. The heat exchange core 20 is disposed within the heat exchanger housing 10.
Specifically, the heat exchanger case 10 is formed with an inlet port 11 at an upper end and an outlet port 12 at a lower end. Preferably, the portions of the heat exchanger housing 10 adjacent to the inlet port 11 and the outlet port 12 are tapered.
As shown in fig. 3, the difference from the aforementioned conventional microchannel plate type particle heat exchanger is that in the embodiment of the present application, the heat exchange core 20 includes a plurality of heat exchange plates 21, and the plurality of heat exchange plates 21 are arranged in parallel at intervals along a first direction (X direction) extending horizontally. In the embodiment of the present application, the heat exchange plate 21 has a rectangular shape. The heat exchanger plate 21 has a number of fluid channels 211 formed therein for the passage of a fluid medium therethrough. A plurality of guide bars 22 are provided at the gaps between the adjacent two heat exchange plates 21, and the plurality of guide bars 22 between the adjacent two heat exchange plates 21 are arranged at intervals in a second direction (Y direction) horizontally extending and perpendicular to the first direction and form a plurality of guide channels 23 between the two heat exchange plates 21. The guide passage 23 has an inlet 232 at an upper end and an outlet 231 at a lower end. The particles pass through the guide channel 23 from top to bottom under the influence of gravity.
In an embodiment of the application, several fluid channels 211 in the heat exchanger plate 21 are arranged in parallel and spaced apart. Specifically, several fluid channels 211 within the heat exchanger plate 21 extend in the second direction. In the heat exchange operation, the fluid medium transversely flows in the fluid channels 211 of the heat exchange plate 21, and the densely packed particles flow from top to bottom in the guide channels 23 by gravity self-driving, so that the cold and hot media form cross flow heat exchange.
In the embodiment of the present application, the difference in caliber of the outlet 231 and the inlet 232 of the guide passage 23 between the adjacent two heat exchange plates 21 is inversely proportional to the distance of the middle portion of the heat exchange plate 21 corresponding to the distance of the guide passage 23. Here, the middle of the heat exchange plate 21 refers to the middle position of the heat exchange plate 21 in the second direction, and the difference in caliber of the outlet 231 and the inlet 232 of the guide passage 23 is a value indicating the caliber of the outlet 231 minus the caliber of the inlet 232.
Preferably, the apertures of the inlets 232 of the plurality of guide channels 23 between adjacent two heat exchange plates 21 are the same and the apertures of the outlets 231 of the plurality of guide channels 23 are gradually reduced in a direction away from the middle of the corresponding heat exchange plate 21.
As shown in fig. 4, as a specific embodiment, the guide bars 22 of the plurality of guide bars 22 between the adjacent two heat exchange plates 21, which are located at the middle of the heat exchange plate 21, are vertically disposed, and the inclination angles of the guide bars 22 located at both sides of the vertically disposed guide bars 22 at the middle of the heat exchange plate 21 in a direction away from the middle of the corresponding heat exchange plate 21 are gradually increased. In this way, the diameters of the inlets 232 of the plurality of guide channels 23 between the adjacent two heat exchange plates 21 are the same, and the diameters of the outlets 231 of the plurality of guide channels 23 gradually decrease in a direction away from the middle of the corresponding heat exchange plate 21. And the difference in caliber between the outlet 231 and the inlet 232 of the guide channel 23 between the adjacent two heat exchange plates 21 gradually decreases from a positive value to a negative value in a direction away from the middle of the heat exchange plate 21.
It will be appreciated that the above-described arrangement of the guide strips 22 is such that the inlet openings 232 of the guide channels 23 between adjacent two heat exchanger plates 21 are of the same caliber, and therefore the amount of particles entering each guide channel 23 tends to be uniform. Whereas, due to the inclination arrangement, the aperture of the outlet 231 of the guide channel 23 will exhibit a widest in the middle and gradually decreasing trend towards both sides. The resulting effects are: after the particles are equally distributed into the respective guide channels 23, the particles in the middle will undergo a widening of the flow path and a slowing down of the flow path during the falling, while the particles on both sides will undergo a narrowing of the flow path and a speeding up of the flow path. The change can balance the phenomena of high speed in the central area and low speed in the edge area of the particle flow of the microchannel plate type particle heat exchanger in the prior art. So that the flow velocity and the heat exchange effect of the particles at each position between the two heat exchange plates 21 tend to be uniform. Finally, in the second direction, the particle outlet temperature is made uniform.
In particular, the narrowest distance between the guide strips 22 is not less than 10 times the particle size of the particles to avoid the possibility of clogging of the particles. In the embodiment of the present application, the guide bar 22 is a metal bar. The metal guide strips increase the heat exchange area and strengthen the turbulence of the particles.
In the embodiment of the present application, the guide bars 22 located at both sides of the vertically disposed guide bar 22 in the middle of the heat exchange plate 21 are symmetrically distributed with respect to the vertically disposed guide bar 22 in the middle. In this way, the temperature uniformity of the particles at the outlet 231 is further ensured.
In the embodiment of the present application, the guide bars 22 on both sides farthest from the vertically disposed guide bars 22 in the middle of the heat exchange plate 21 are also vertically disposed.
It will be appreciated that, assuming that the guide bars 22 on both sides are disposed obliquely, a part of the space formed between the adjacent two heat exchange plates 21 is necessarily not utilized. The vertical arrangement of the guide bars 22 on both sides thus maximizes the space between the heat exchanger plates 21 of the microchannel plate type particle heat exchanger of the present application.
In the embodiment of the present application, the apertures of the inlets 232 of the guide channels 23 of different levels gradually decrease in the first direction in a direction away from the middle of the heat exchange core 20. It will be appreciated that the heat exchange core 20 of the present application is composed of a plurality of parallel heat exchange plates 21, and the heat exchange plates 21 located at the intermediate position are closer to the middle of the heat exchange core 20. I.e. the degree of packing of the guide bars 22 arranged between the heat exchanger plates 21 at different positions of the heat exchanger core 20 is not uniform.
Referring specifically to fig. 3, the number of guide bars 22 between the heat exchange plates 21 located at the central position of the heat exchange core 20 is smaller than the number of guide bars 22 between the heat exchange plates 21 located at the edge position of the heat exchange core 20. The guide strips 22 between the heat exchange plates 21 at the center of the heat exchange core 20 are most sparse, the guide channels 23 are the largest in size, and the inlets M of the guide channels 23 are the largest in caliber. The guide strips 22 between the heat exchanger plates 21 at the edges of the heat exchanger core 20 are most dense, the guide channels 23 are the smallest in size, and the inlet N of the guide channels 23 is the smallest in caliber. The resulting effects are: on the one hand, the smaller the guide channel 23 size, the faster the flow rate. On the other hand, the denser the guide strips 22, the more pronounced the fin enhances the heat exchange. Therefore, when the particle flow enters the heat exchanger, the physical phenomena of fast speed in the central area and slow speed in the edge area are balanced by the arrangement mode of the guide strips 22, so that the flow velocity and the heat exchange effect between the plates at each position of the particle heat exchange core 20 tend to be consistent, and finally the temperature of the particle outlet is uniform in the first direction.
As shown in fig. 5, the guide bar 22 of the present application may be a simple straight edge in fig. 5 (a) in the height direction. Or the corrugated curve-shaped side edge in the figure 5 (b) can enhance the disturbance effect of downward flow of particles and enhance the heat exchange effect.
As shown in fig. 6, both sides of the guide bar 22 forming the guide channel 23 may be in a planar form as shown in fig. 6 (a). Or may be an inwardly concave curved surface as shown in fig. 6 (b) and 6 (c). Preferably, at least one of the two sides of the guide strip 22 forming the guide channel 23 is recessed inwards, i.e. the side of the transverse cross section facing the guide channel 23 is in the form of an inwardly recessed curve or polygonal fold line, thereby increasing the caliber of the guide channel 23 and at the same time also increasing the contact area of the guide strip 22 with the particle flow.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be appreciated by persons skilled in the art that the above embodiments are not intended to limit the invention in any way, and that all technical solutions obtained by means of equivalent substitutions or equivalent transformations fall within the scope of the invention.
Claims (10)
1. A microchannel plate type particulate heat exchanger comprising:
A heat exchanger housing formed with an inlet port and an outlet port;
the heat exchange core body is arranged in the heat exchanger shell;
the heat exchange core comprises:
The heat exchange plates are arranged at intervals in parallel along a first direction extending horizontally, a plurality of fluid channels are formed in the heat exchange plates, a plurality of guide strips are arranged at gaps between two adjacent heat exchange plates, and the guide strips between the two adjacent heat exchange plates extend along a second direction perpendicular to the first direction at intervals so as to form a plurality of guide channels between the two heat exchange plates;
The difference between the diameters of the outlet and the inlet of the guide channel between two adjacent heat exchange plates is inversely proportional to the distance between the middle parts of the heat exchange plates corresponding to the distance between the guide channels.
2. The microchannel plate type particulate heat exchanger of claim 1, wherein,
The calibers of the inlets of the plurality of guide channels between two adjacent heat exchange plates are the same, and the calibers of the outlets of the plurality of guide channels gradually decrease in a direction away from the middle part of the corresponding heat exchange plate.
3. The microchannel plate type particulate heat exchanger of claim 2, wherein,
The guide strips of the guide strips between two adjacent heat exchange plates, which are positioned in the middle of the heat exchange plates, are vertically arranged, and the inclination angles of the guide strips on two sides of the guide strips, which are vertically arranged in the middle of the heat exchange plates, in the direction away from the middle of the corresponding heat exchange plates are gradually increased.
4. A microchannel plate type particulate heat exchanger as claimed in claim 3 wherein,
The guide strips positioned on two sides of the guide strip which are vertically arranged in the middle of the heat exchange plate are symmetrically distributed relative to the guide strip which is vertically arranged in the middle.
5. The microchannel plate type particulate heat exchanger of claim 3, wherein,
The guide strips on the two sides farthest from the guide strips vertically arranged in the middle of the heat exchange plate are also vertically arranged.
6. The microchannel plate type particulate heat exchanger of any one of claims 2 to 5, wherein,
In the first direction, the apertures of the inlets of the guide channels of different levels gradually decrease in a direction away from the middle of the heat exchange core.
7. The microchannel plate type particulate heat exchanger of claim 1, wherein,
At least one of two sides of the guide bar forming the guide channel is recessed inward.
8. The microchannel plate type particulate heat exchanger of claim 1, wherein,
The guide strip is a metal strip.
9. The microchannel plate type particulate heat exchanger of claim 1, wherein,
The fluid channels in the heat exchange plate are arranged in parallel at intervals.
10. The microchannel plate type particulate heat exchanger of claim 9, wherein,
A number of the fluid channels in the heat exchanger plate extend in the second direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211690475.9A CN118258244A (en) | 2022-12-27 | 2022-12-27 | Microchannel plate type particle heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211690475.9A CN118258244A (en) | 2022-12-27 | 2022-12-27 | Microchannel plate type particle heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118258244A true CN118258244A (en) | 2024-06-28 |
Family
ID=91606280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211690475.9A Pending CN118258244A (en) | 2022-12-27 | 2022-12-27 | Microchannel plate type particle heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118258244A (en) |
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2022
- 2022-12-27 CN CN202211690475.9A patent/CN118258244A/en active Pending
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| Date | Code | Title | Description |
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| PB01 | Publication |