CN114234704B - Wing-shaped structure, heat exchange plate, heat exchanger and heat exchange method - Google Patents
Wing-shaped structure, heat exchange plate, heat exchanger and heat exchange method Download PDFInfo
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- CN114234704B CN114234704B CN202111529626.8A CN202111529626A CN114234704B CN 114234704 B CN114234704 B CN 114234704B CN 202111529626 A CN202111529626 A CN 202111529626A CN 114234704 B CN114234704 B CN 114234704B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000012530 fluid Substances 0.000 claims abstract description 54
- 229910000619 316 stainless steel Inorganic materials 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 239000010936 titanium Substances 0.000 claims description 8
- 229910052719 titanium Inorganic materials 0.000 claims description 8
- 239000010963 304 stainless steel Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910000601 superalloy Inorganic materials 0.000 claims description 4
- 238000005530 etching Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract description 18
- 230000008021 deposition Effects 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 24
- 239000007787 solid Substances 0.000 description 16
- 230000008859 change Effects 0.000 description 15
- 239000002245 particle Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 239000013078 crystal Substances 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 5
- 230000006911 nucleation Effects 0.000 description 5
- 238000010899 nucleation Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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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
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
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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
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
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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
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides an airfoil structure, a heat exchange plate, a heat exchanger and a heat exchange method, and belongs to the technical field of heat exchangers. The wing-shaped structure comprises a shell, at least one flow passage is axially arranged in the shell, each flow passage comprises a plurality of communicated accommodating cavities, the accommodating cavities are divided into a plurality of sub accommodating cavities with different inner diameters, and the sub accommodating cavities with different inner diameters are communicated through miniature discrete channels. The heat exchange plate comprises a base plate and a plurality of wing-shaped structures, wherein the wing-shaped structures are fixedly arranged on the base plate. The heat exchanger comprises the heat exchange plate. The heat exchange method comprises the steps that working fluid enters a sub-accommodating cavity from a miniature discrete channel of an airfoil structure; working fluid in the sub-accommodating cavity enters the next sub-accommodating cavity again through the micro discrete channel and is circularly reciprocated; until the working fluid leaves the airfoil after passing through the last sub-receiving chamber in the flow path. It has the characteristics of high heat transfer efficiency and can reduce the deposition of scale substances.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to an airfoil structure, a heat exchange plate, a heat exchanger and a heat exchange method.
Background
The heat exchanger is one of important equipment in the fields of petrochemical industry, energy power and the like. Currently, most of the heat is converted by heat exchangers. Therefore, the performance of the heat exchanger directly influences the comprehensive energy consumption in various fields. In recent years, with the development of the heat of supercritical CO 2 power generation system, a printed circuit board type heat exchanger is also widely focused as an important component of the system. The printed circuit board type heat exchanger has the characteristics of compact structure, high heat exchange efficiency, high temperature and high pressure bearing capacity and the like. However, the printed circuit board type heat exchanger in the prior art has limited heat transfer capacity improving space, is easy to scale and blocks the flow channel.
Disclosure of Invention
In view of the above, the present invention provides an airfoil structure, a heat exchange plate, a heat exchanger and a heat exchange method, which have the characteristics of high heat transfer efficiency, and also can reduce deposition of scale substances, so that the airfoil structure, the heat exchange plate, the heat exchanger and the heat exchange method are more practical.
In order to achieve the first object, the technical scheme of the airfoil structure provided by the invention is as follows:
the wing structure provided by the invention comprises a shell, at least one flow passage is axially arranged in the shell,
Each flow passage comprises a plurality of communicated accommodating cavities,
The accommodating cavity is divided into a plurality of sub accommodating cavities with different inner diameters,
The plurality of sub-accommodating cavities with different inner diameters are communicated through miniature discrete channels;
wherein,
The equivalent diameter of the accommodating cavity is at least 2 times of that of the micro discrete channel;
the flow direction leading edge of the wing-shaped structure is a miniature discrete channel, and the flow direction trailing edge of the wing-shaped structure is a sub-accommodating cavity.
The airfoil structure provided by the invention can be further realized by adopting the following technical measures.
Preferably, the flow passage includes 1 row and more than 1 column in the height direction in the axial direction of the housing.
As a preferred alternative to this,
The radial width Lw of the airfoil structure has a value ranging from 0.2mm to 2mm,
The length Lc of the airfoil structure has a value in the range of 1mm to 10mm,
The value range of the inner diameter of the micro discrete channel is 0.05mm-1mm.
Preferably, the material of the housing is one selected from 316 stainless steel, 304 stainless steel, 316L stainless steel, pure titanium TA1, pure titanium TC4, nickel-based superalloy, and aluminum alloy.
In order to achieve the second object, the technical scheme of the heat exchange plate provided by the invention is as follows:
The heat exchange plate provided by the invention comprises a base plate and the wing-shaped structure provided by the invention, wherein the wing-shaped structure is fixedly arranged on the base plate.
The airfoil structure provided by the invention can be further realized by adopting the following technical measures.
Preferably, the airfoil structures are arranged in parallel or in a staggered arrangement on the base plate,
The value range of the flow direction interval Lp of the wing-shaped structure is 0.4mm-20mm,
The normal distance Lv of the airfoil structure has a value ranging from 0.4mm to 20mm.
Preferably, the airfoil structure and the base plate are integrally formed, or the airfoil structure and the base plate are respectively formed and then fixedly connected into a whole.
Preferably, the method of integral molding is etching the substrate and airfoil structure on the metal plate.
In order to achieve the third object, the technical scheme of the heat exchanger provided by the invention is as follows:
The heat exchanger provided by the invention comprises the sealing head, the inlet and outlet pipelines and the heat exchange plate provided by the invention, wherein the inlet and outlet pipelines are respectively connected with the sealing head and the inlet of the heat exchange plate.
In order to achieve the fourth object, the technical scheme of the heat exchange method provided by the invention is as follows:
the heat exchange method provided by the invention is realized based on the heat exchanger provided by the invention, and comprises the following steps,
Working fluid enters the sub-accommodating cavity from the micro discrete channel at the front edge of the airfoil structure;
Working fluid in the sub-accommodating cavity enters the next sub-accommodating cavity again through the micro discrete channel and is circularly reciprocated;
Until the working fluid leaves the trailing edge of the airfoil structure after passing through the last sub-receiving chamber in the flow path.
Based on the wing-shaped structure, the heat exchange plate, the heat exchanger and the heat exchange method provided by the invention, working fluid enters the micro discrete channel from the front edge of the wing-shaped structure, and the area is reduced, so that the speed of the fluid in the micro discrete channel is increased sharply, the pressure is reduced sharply as a cost, then the fluid enters the sub-accommodating cavity, the flow speed is reduced gradually, and meanwhile, the pressure rises back, so that a local ultrasonic cavitation effect is formed in the micro discrete channel and the sub-accommodating cavity. In the process, cavitation collapse causes the change of physical and chemical properties of the fluid medium, inhibits nucleation and growth of scale forming particles in the fluid at the solid wall, and reduces the number of the scale forming particles adhered to the solid wall. Moreover, the ultrasonic cavitation can improve the activity of the scale forming substances, change the scale crystal state, change the volume into one ten thousandth to one hundred percent before the ultrasonic cavitation, destroy the conditions of scale substance generation and solid wall deposition, and achieve the purpose of scale removal. In addition, in the ultrasonic cavitation process, rapid collapse of cavitation bubbles is involved, and high-speed fluid flow is initiated along with rapid release of accumulated energy, so that the flow strength of the fluid is greatly improved, and the effect of enhancing heat exchange is generated.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic perspective view of a heat exchange plate with an airfoil structure according to an embodiment of the present invention and in the prior art;
FIG. 2 is a schematic view of a flow velocity distribution of a prior art heat exchange plate with airfoil configuration;
FIG. 3 is a schematic flow rate analysis diagram of a prior art heat exchanger plate with airfoil configuration;
FIG. 4 is a cross-sectional view of an airfoil structure in a height direction according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of an airfoil structure in a width direction according to an embodiment of the present invention;
FIG. 6 is a top view of a heat exchanger plate with airfoil configuration according to an embodiment of the present invention;
Reference numerals illustrate:
1-mixing zone, 2-low speed zone, 3-stagnation zone, 4-high speed zone, 5-boundary zone, lc-airfoil length, lw-airfoil width, lv-airfoil normal spacing, lp-airfoil flow direction spacing, 6-substrate, 7-airfoil, 8-housing, 9-sub-accommodation cavity, 10-micro discrete channel, 11-accommodation cavity, 12 a-first flow channel, 12 b-second flow channel, 12 c-third flow channel.
Detailed Description
In view of the above, the present invention provides an airfoil structure, a heat exchange plate, a heat exchanger and a heat exchange method, which have the characteristics of high heat transfer efficiency, and also can reduce deposition of scale substances, so that the airfoil structure, the heat exchange plate, the heat exchanger and the heat exchange method are more practical.
The inventor has made great efforts, and found that, in the prior art, referring to fig. 1, 2 and 3, during the operation of the heat exchanger with the airfoil structure 7, although the inlet is provided with a filter, the fluid inevitably contains part of impurities, and after long-term operation, the fluid can scale in the airfoil channels, resulting in channel blockage or reduced heat exchange effect. In addition, from the aspect of flow velocity distribution of the airfoil passage structure, as shown in fig. 3, the flow velocity is relatively fast at the maximum width of the airfoil structure 7, i.e. the high-speed region 4 is formed at the position, and the heat exchange effect is best. The fluid impinges on the leading edge of the airfoil structure 7 where a stagnation zone 3 is formed, the flow velocity is low and the heat exchange effect is therefore also poor. At the trailing edge of the airfoil structure 7, the fluid mixing zone 1 is less efficient in mixing, and therefore, there is also a low velocity zone 2, and the heat transfer is very poor. Meanwhile, as the wing-shaped structure 7 is of a solid structure, the internal heat transfer is in a heat conduction mode, so that the thermal resistance is large, and the heat transfer effect is poor.
In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description refers to an airfoil structure, a heat exchange plate, a heat exchanger and a heat exchange method according to the present invention, and specific embodiments, structures, features and effects thereof. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
The term "and/or" is herein merely an association relation describing an associated object, meaning that three relations may exist, e.g. a and/or B, specifically understood as: the composition may contain both a and B, and may contain a alone or B alone, and any of the above three cases may be provided.
Airfoil structural embodiments
Referring to fig. 1, fig. 4, fig. 5, and fig. 6, an airfoil structure 7 according to an embodiment of the present invention includes a casing 8, and at least one flow passage is axially provided in the casing 8. Each flow passage comprises a plurality of communicated accommodating cavities 11, the accommodating cavities 11 are divided into a plurality of sub-accommodating cavities 9 with different inner diameters, and the sub-accommodating cavities 9 with different inner diameters are communicated through miniature discrete channels 10. Wherein the equivalent diameter of the accommodating cavity 11 is at least 2 times of the equivalent diameter of the micro discrete channel 10; the flow direction leading edge of the wing-shaped structure 6 is a miniature discrete channel 10, and the flow direction trailing edge of the wing-shaped structure 11 is a sub-accommodating cavity 9.
Based on the airfoil structure 7 provided by the invention, working fluid enters the micro discrete channel 10 from the front edge of the airfoil structure 7, and the area is reduced, so that the speed of the fluid in the micro discrete channel 10 is increased sharply, the pressure is reduced sharply at the expense, then the fluid enters the sub-accommodating cavity 9, the flow speed is reduced gradually, and meanwhile, the pressure is raised back, so that a local ultrasonic cavitation effect is formed in the micro discrete channel 10 and the sub-accommodating cavity 9. In the process, cavitation collapse causes the change of physical and chemical properties of the fluid medium, inhibits nucleation and growth of scale forming particles in the fluid at the solid wall, and reduces the number of the scale forming particles adhered to the solid wall. Moreover, the ultrasonic cavitation can improve the activity of the scale forming substances, change the scale crystal state, change the volume into one ten thousandth to one hundred percent before the ultrasonic cavitation, destroy the conditions of scale substance generation and solid wall deposition, and achieve the purpose of scale removal. In addition, in the ultrasonic cavitation process, rapid collapse of cavitation bubbles is involved, and high-speed fluid flow is initiated along with rapid release of accumulated energy, so that the flow strength of the fluid is greatly improved, and further the effect of enhancing heat exchange is generated.
Wherein the flow passage includes 1 row and a plurality of columns in the height direction in the axial direction of the housing (see fig. 5, in this embodiment, the plurality of columns of flow passages includes a first flow passage 12a, a second flow passage 12b, and a third flow passage 12 c). In this case, the working fluid can be separated at the airfoil structure 7 to pass through a plurality of flow passages, which can further enhance the heat exchange effect and reduce the possibility of scaling.
Wherein, the radial width Lw of the airfoil structure 7 has a value range of 0.2mm-2mm, the length Lc of the airfoil structure 7 has a value range of 1mm-10mm, and the inner diameter of the micro discrete channel 10 has a value range of 0.05mm-1mm. In this case, the flow rate variation generated between the micro discrete channels 10 and the sub-receiving chamber 9 can be made more prominent, thereby making the ultrasonic cavitation effect of the working fluid more excellent.
Wherein, the material of the shell 8 is one selected from 316 stainless steel, 304 stainless steel, 316L stainless steel, pure titanium TA1, pure titanium TC4, nickel-based superalloy and aluminum alloy. In this case, since these materials have corrosion resistance effects, they can be used for various working fluids.
Heat exchange plate embodiment
The heat exchange plate provided by the embodiment of the invention comprises a base plate 6 and the wing-shaped structure 7 provided by the invention, wherein the wing-shaped structure 7 is fixedly arranged on the base plate 6. In the embodiment, the heat exchange plate is a metal plate with the thickness of 1 mm-5 mm, and the material is one of 316 stainless steel, 304 stainless steel, 316L stainless steel, pure titanium TA1, pure titanium TC4, nickel-based superalloy and aluminum alloy.
Based on the heat exchange plate provided by the invention, working fluid enters the micro discrete channel 10 from the front edge of the airfoil structure 7, and the area is reduced, so that the speed of the fluid in the micro discrete channel 10 is increased sharply, the pressure is reduced sharply at the expense, then the fluid enters the sub-accommodating cavity 9, the flow speed is reduced gradually, and meanwhile, the pressure is raised back, so that a local ultrasonic cavitation effect is formed between the micro discrete channel 10 and the sub-accommodating cavity 9. In the process, cavitation collapse causes the change of physical and chemical properties of the fluid medium, inhibits nucleation and growth of scale forming particles in the fluid at the solid wall, and reduces the number of the scale forming particles adhered to the solid wall. Moreover, the ultrasonic cavitation can improve the activity of the scale forming substances, change the scale crystal state, change the volume into one ten thousandth to one hundred percent before the ultrasonic cavitation, destroy the conditions of scale substance generation and solid wall deposition, and achieve the purpose of scale removal. In addition, in the ultrasonic cavitation process, rapid collapse of cavitation bubbles is involved, and high-speed fluid flow is initiated along with rapid release of accumulated energy, so that the flow strength of the fluid is greatly improved, and further the effect of enhancing heat exchange is generated.
The wing-shaped structures 7 are arranged in parallel or in a staggered mode on the base plate 6, the value range of the flow direction distance Lp of the wing-shaped structures 7 is 0.4-20 mm, and the value range of the normal direction distance Lv of the wing-shaped structures 7 is 0.4-20 mm. In this case, the flow channels formed between the airfoil structures 7 on the base plate 6 are more advantageous for the flow of the working fluid.
The airfoil structure 7 and the base plate 6 are integrally formed, or the airfoil structure 7 and the base plate 6 are respectively formed and then fixedly connected into a whole. In the present embodiment, the specific connection method between the airfoil structure 7 and the substrate 6 may be various, as long as the airfoil structure 7 can be fixedly disposed on the substrate 6, for example, the airfoil structure 7 may be welded to the substrate 6, or may be implemented by CAD or CAM cutting.
The integrated forming method is that the base plate 6 and the wing-shaped structure 7 are formed on the metal plate by etching, in this case, no connecting joint exists between the base plate 6 and the wing-shaped structure 7, and stress concentration at the connecting position of the base plate 6 and the wing-shaped structure 7 can be reduced, so that the service life of the heat exchange plate provided by the implementation of the invention is prolonged.
Heat exchanger embodiments
The heat exchanger provided by the embodiment of the invention comprises the heat exchange plate provided by the invention.
According to the heat exchanger provided by the embodiment of the invention, working fluid enters the micro discrete channels 10 from the front edge of the airfoil structure 7, and the area is reduced, so that the speed of the fluid in the micro discrete channels 10 is increased sharply, the pressure is reduced sharply at the expense, the flow rate is reduced gradually, and meanwhile, the pressure is raised, so that a local ultrasonic cavitation effect is formed in the micro discrete channels 10 and the sub-accommodating cavities 9. In the process, cavitation collapse causes the change of physical and chemical properties of the fluid medium, inhibits nucleation and growth of scale forming particles in the fluid at the solid wall, and reduces the number of the scale forming particles adhered to the solid wall. Moreover, the ultrasonic cavitation can improve the activity of the scale forming substances, change the scale crystal state, change the volume into one ten thousandth to one hundred percent before the ultrasonic cavitation, destroy the conditions of scale substance generation and solid wall deposition, and achieve the purpose of scale removal. In addition, in the ultrasonic cavitation process, rapid collapse of cavitation bubbles is involved, and high-speed fluid flow is initiated along with rapid release of accumulated energy, so that the flow strength of the fluid is greatly improved, and further the effect of enhancing heat exchange is generated.
The heat exchange plate is welded into a core body in a vacuum diffusion welding mode, and then an end socket and an inlet and outlet pipeline are machined in an argon arc welding mode at an inlet and an outlet of the core body, so that the heat exchanger is machined.
Heat exchange method embodiment
The heat exchange method provided by the embodiment of the invention is realized based on the heat exchanger provided by the invention, and comprises the following steps,
Working fluid enters the sub-accommodation cavities 9 from the front-edge micro discrete channels 10 of the airfoil structure 7;
The working fluid in the sub-accommodating cavity 9 enters the next sub-accommodating cavity 9 again through the micro discrete channel 10 and is circularly reciprocated;
Until the working fluid leaves the trailing edge of the aerofoil structure 9 after passing through the last sub-receiving chamber 9 in the flow path.
According to the heat exchange method provided by the invention, working fluid enters the micro discrete channel 10 from the front edge of the airfoil structure 7, and the area is reduced, so that the speed of the fluid in the micro discrete channel 10 is increased sharply, the pressure is reduced sharply at the expense, then the fluid enters the sub-accommodating cavity 9, the flow speed is reduced gradually, and meanwhile, the pressure is raised back, so that a local ultrasonic cavitation effect is formed between the micro discrete channel 10 and the sub-accommodating cavity 9. In the process, cavitation collapse causes the change of physical and chemical properties of the fluid medium, inhibits nucleation and growth of scale forming particles in the fluid at the solid wall, and reduces the number of the scale forming particles adhered to the solid wall. Moreover, the ultrasonic cavitation can improve the activity of the scale forming substances, change the scale crystal state, change the volume into one ten thousandth to one hundred percent before the ultrasonic cavitation, destroy the conditions of scale substance generation and solid wall deposition, and achieve the purpose of scale removal. In addition, in the ultrasonic cavitation process, rapid collapse of cavitation bubbles is involved, and high-speed fluid flow is initiated along with rapid release of accumulated energy, so that the flow strength of the fluid is greatly improved, and further the effect of enhancing heat exchange is generated.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. An airfoil structure is characterized by comprising a shell, wherein at least one flow passage is axially arranged in the shell,
Each flow passage comprises a plurality of communicated accommodating cavities,
The accommodating cavity is divided into a plurality of sub accommodating cavities with different inner diameters,
The plurality of sub-accommodating cavities with different inner diameters are communicated through miniature discrete channels;
wherein,
The equivalent diameter of the accommodating cavity is at least 2 times of the equivalent diameter of the micro discrete channel;
The flow direction leading edge of the airfoil structure is the miniature discrete channel, and the flow direction trailing edge of the airfoil structure is the sub-accommodating cavity;
The radial width Lw of the airfoil structure has a value ranging from 0.2mm to 2mm,
The length Lc of the airfoil structure has a value in the range of 1mm to 10mm,
The value range of the inner diameter of the miniature discrete channel is 0.05mm-1mm.
2. The airfoil structure of claim 1, wherein the flow passage comprises 1 row and more columns in a height direction in an axial direction of the housing.
3. The airfoil structure of claim 1, wherein the shell is made of one of 316 stainless steel, 304 stainless steel, 316L stainless steel, pure titanium TA1, pure titanium TC4, nickel-based superalloy, and aluminum alloy.
4. A heat exchanger plate comprising a base plate and a plurality of airfoil structures according to any one of claims 1-3, said airfoil structures being fixedly arranged on said base plate.
5. The heat exchange plate of claim 4 wherein the airfoil structures are arranged in parallel or offset arrangement on the base plate,
The value range of the flow direction interval Lp of the wing-shaped structure is 0.4mm-20mm,
The normal distance Lv of the wing-shaped structure has a value range of 0.4mm-20mm.
6. A heat exchange plate according to claim 4 wherein the airfoil structure is integrally formed with the base plate or the airfoil structure and base plate are separately formed and fixedly connected as a unit.
7. A heat exchange plate according to claim 6, wherein the integral moulding is by etching the base plate and the airfoil structure into a metal plate.
8. A heat exchanger comprising a head, an inlet and outlet pipe and a heat exchanger plate according to any one of claims 4 to 7, wherein the inlet and outlet pipe is connected to the head and the inlet of the heat exchanger plate, respectively.
9. A heat exchange method, characterized in that it is realized based on the heat exchanger according to claim 8, comprising the steps of,
Working fluid enters the sub-accommodating cavity from the micro discrete channels at the front edge of the airfoil structure;
Working fluid in the sub-accommodating cavity enters the next sub-accommodating cavity again through the micro discrete channel and is circularly reciprocated;
until the working fluid leaves the trailing edge of the airfoil structure after passing through the last sub-accommodation cavity in the flow path.
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| CN202111529626.8A CN114234704B (en) | 2021-12-14 | 2021-12-14 | Wing-shaped structure, heat exchange plate, heat exchanger and heat exchange method |
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| CN202111529626.8A CN114234704B (en) | 2021-12-14 | 2021-12-14 | Wing-shaped structure, heat exchange plate, heat exchanger and heat exchange method |
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| CN114234704A CN114234704A (en) | 2022-03-25 |
| CN114234704B true CN114234704B (en) | 2024-05-17 |
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| CN105547019A (en) * | 2015-12-15 | 2016-05-04 | 西安交通大学 | High temperature and high pressure plate heat exchanger for fins distributed unevenly |
| CN109990640A (en) * | 2019-03-12 | 2019-07-09 | 西安交通大学 | A kind of heat exchanger plates of open flume type streamline rib type structure |
| CN212458065U (en) * | 2019-12-02 | 2021-02-02 | 西安热工研究院有限公司 | Variable-section airfoil-shaped efficient heat exchange channel for supercritical carbon dioxide PCHE |
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| WO2021046314A1 (en) * | 2019-09-05 | 2021-03-11 | Carrier Corporation | Vortex-enhanced heat exchanger |
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| CN103954162A (en) * | 2014-05-16 | 2014-07-30 | 中国科学院工程热物理研究所 | Low resistance hydraulic cavitation structure with microchannel heat exchange enhancing function |
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| CN105547019A (en) * | 2015-12-15 | 2016-05-04 | 西安交通大学 | High temperature and high pressure plate heat exchanger for fins distributed unevenly |
| CN109990640A (en) * | 2019-03-12 | 2019-07-09 | 西安交通大学 | A kind of heat exchanger plates of open flume type streamline rib type structure |
| CN212458065U (en) * | 2019-12-02 | 2021-02-02 | 西安热工研究院有限公司 | Variable-section airfoil-shaped efficient heat exchange channel for supercritical carbon dioxide PCHE |
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