CN111981873B - Hot melt type gas-liquid double-phase heat exchanger - Google Patents
Hot melt type gas-liquid double-phase heat exchanger Download PDFInfo
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- CN111981873B CN111981873B CN202010387759.5A CN202010387759A CN111981873B CN 111981873 B CN111981873 B CN 111981873B CN 202010387759 A CN202010387759 A CN 202010387759A CN 111981873 B CN111981873 B CN 111981873B
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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
- F28D7/02—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 helically coiled
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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
- 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
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a hot melt type gas-liquid two-phase heat exchanger which comprises a core body, a sealing wall, a drainage assembly and a baffling assembly, wherein the core body comprises a first core body and a second core body, a plurality of gas flow channels and liquid flow channels are respectively arranged in the first core body and the second core body, and the gas flow channels and the liquid flow channels are of 3D spiral channel structures. The drainage assembly leads liquid into the liquid flow channel of the first core body and leads out the liquid in the liquid flow channel of the second core body; the baffle assembly diverts liquid in the liquid flow passage in the first core back into the liquid flow passage in the second core. Compared with the prior art, the heat exchanger remarkably improves the heat exchange efficiency on the basis of one-step forming, can greatly reduce the utilization rate of materials, can adjust the gas-liquid ratio according to requirements, extremely improves the heat exchange efficiency, reduces the loss of the materials and solves the technical bottleneck problem that the heat exchange capacity of the existing heat exchanger is difficult to improve.
Description
Technical Field
The invention relates to the field of heat exchangers, in particular to a hot melt type gas-liquid two-phase heat exchanger.
Background
The gas-liquid heat exchanger is widely used in industrial production processes and has the functions of preheating and heating gas or liquid, recovering residual heat of the liquid or the gas and the like, and the gas-liquid heat exchanger comprises a double-pipe type, a shell-and-tube type, a plate-and-frame type and other structures.
At present, although the types of heat exchangers commonly used in the market are various, most of the heat exchangers have similar structures. Due to the requirement of industrial production, most parts need to be produced separately, and a manufacturing mode of reducing material manufacturing needs to be adopted, so that the complex problems of sealing difficulty, production difficulty and the like of the parts of the equipment need to be considered.
In the existing gas-liquid heat exchange, the design that gas-liquid flow channels are mutually independent is mostly adopted, namely two sets of independent fluid structure systems are adopted, although a designer can increase the gas-liquid contact area in modes of a wave plate and the like, the heat transfer area is always smaller than the material surface area, the materials cannot be fully utilized, and the essential problems of waste of a large amount of materials, the bottleneck of heat exchange efficiency and the like which cannot be broken through are caused.
CN102012175B discloses a novel gas-liquid heat exchange device, which comprises a main heat exchange plate and a plurality of auxiliary heat exchange fins; the method is characterized in that: the main heat exchange plate is provided with a liquid inlet and a liquid outlet, the inside of the main heat exchange plate is provided with a liquid inlet main channel and a liquid outlet main channel which are respectively connected with the liquid inlet and the liquid outlet, the auxiliary heat exchange fins are vertically arranged on the main heat exchange plate in parallel at intervals, each auxiliary heat exchange fin is internally provided with a liquid inlet sub channel and a liquid outlet sub channel which are respectively connected with the liquid inlet main channel and the liquid outlet main channel, and simultaneously, a plurality of vertical sub channels which are communicated with the liquid inlet sub channel and the liquid outlet sub channels are also arranged in each auxiliary heat exchange fin. However, the surface area of the material in the gas-liquid heat exchanger is far larger than the heat exchange area, so that the utilization rate of the heat exchange material in the heat exchanger is difficult to improve, and the heat exchange capacity cannot be further improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the hot melt type gas-liquid two-phase heat exchanger, which utilizes the advantages of good periodicity, high material utilization rate and convenience in additive manufacturing of a 3D spiral flow channel, so that the heat exchanger can remarkably improve the heat exchange efficiency on the basis of one-step molding, greatly reduce the material utilization rate, adjust the gas-liquid ratio according to requirements, neglect the manufacturing sealing problem of products, and extremely improve the heat exchange efficiency and reduce the material loss.
The purpose of the invention can be realized by the following technical scheme:
the hot melt type gas-liquid two-phase heat exchanger comprises a core body, a sealing wall, a drainage assembly and a baffling assembly, wherein the hot melt type gas-liquid two-phase heat exchanger specifically comprises the following components:
the core body comprises a first core body and a second core body, wherein a plurality of gas flow channels and liquid flow channels are respectively arranged in the first core body and the second core body, and the gas flow channels and the liquid flow channels are of 3D spiral channel structures; the extending length directions of the 3D spiral channels corresponding to the gas channel and the liquid channel are mutually vertical to form a dividing wall type heat exchange structure;
after the liquid to be heated flows through the liquid channel of the first core body, the liquid to be heated can flow into the liquid flow channel of the second core body through the external guide part, so that the liquid to be heated forms a U-shaped return flow direction;
the gas to be exchanged sequentially flows through the second core and the first core through the gas flow passage to complete gas-liquid heat exchange.
The sealing wall is coated on the periphery of the core body, and is provided with a through hole matched with the inlet and the outlet of the gas flow passage;
the drainage assembly is arranged at the top of the core body, introduces liquid into the liquid flow channel of the first core body and leads out the liquid in the liquid flow channel of the second core body;
the baffling component is arranged at the bottom of the core body and used for enabling liquid in the liquid flow channel in the first core body to flow back into the liquid flow channel of the second core body.
Furthermore, a partition plate is arranged between the first core body and the second core body. The partition plate plays a role in dividing
Further, the baffle assembly includes an arc-shaped lower shell plate. Because of the design of the concave arc, a concave cavity is formed between the arc lower shell plate and the core body, the flow resistance is reduced to the maximum extent, and meanwhile, the liquid flowing downwards in the liquid flow channel of the first core body is enabled to turn back upwards.
Further, the drainage assembly comprises an arc-shaped upper shell plate, a liquid inlet pipe and a liquid outlet pipe. Liquid to be heat-exchanged enters a cavity formed by the arc-shaped upper shell plate and the first core through the liquid inlet pipe, then the liquid to be heat-exchanged enters a liquid flow channel in the first core through the cavity, and returns to the liquid flow channel in the second core after passing through the baffling component. And then the liquid flows out of the liquid flow channel, enters a cavity formed by the arc-shaped upper shell plate and the second core body, and is finally output to the outside through a liquid outlet pipe.
Further, the gas flow channel and the liquid flow channel are both in periodic 3D spiral channel structures, and the corresponding screw pitches of each period of the gas flow channel and the liquid flow channel are the same.
Furthermore, the liquid flow channels spirally extend in the vertical direction in the first core body and the second core body, so that the liquid flow channels are arranged in an array form on the horizontal section;
the gas channels extend spirally in the horizontal direction in the first core body and the second core body, so that the gas channels are arranged in an array form on the vertical section.
Furthermore, the gas in any gas flow channel exchanges heat with the liquid in all the liquid flow channels on the same vertical layer surface.
Furthermore, the gas flow channel and the liquid flow channel are staggered on the plane and staggered in space on the configuration of dividing wall type heat exchange.
Furthermore, the orthogonal cross-sectional area of the gas flow channel is 1-4 times of the orthogonal cross-sectional area of the liquid flow channel.
Further preferably, the orthogonal cross-sectional area of the gas flow channel is 3 times the orthogonal cross-sectional area of the liquid flow channel.
Further, the hot melt type gas-liquid two-phase heat exchanger is prepared by adding materials to heat-conducting metal or non-metal materials.
Compared with the prior art, the invention has the following advantages:
firstly, the application range is wide: because this heat exchanger can carry out the selection of material according to the gas-liquid characteristic, adopts metal, non-metallic material, behind the outside heat exchanger casing of adaptation, all can be suitable for in the environmental requirement of difference.
Secondly, the sealing performance is excellent: because the heat exchanger adopts the additive manufacturing process and is integrally manufactured, any welding points or connecting parts are not needed, the structural body can be integrally printed, and the connection between the core body and the structural wall can be ensured to be closed.
Thirdly, the heat exchange efficiency is high: because the structure of the heat exchanger adopts the hot melt type special structure body, the gas-liquid flow passages respectively adopt the holes of the structure body, the heat exchange is carried out on the structure wall, the heat transfer area is approximately equal to the surface area of the material, and the utilization rate of the material is improved to be nearly 100 percent. Meanwhile, the porous structure is characterized in that the gas-liquid flow is lengthened and the heat exchange area in unit volume is increased in the same volume.
Fourthly, the structure is excellent: the adopted hot melt type structural body has good structural advantages, the surface tension is approximate to zero, the self-made support can be achieved, the resistance to liquid is reduced, and meanwhile, the printing difficulty is greatly reduced.
Drawings
Fig. 1 is a schematic structural view of a hot melt type gas-liquid two-phase heat exchanger according to the present invention.
FIG. 2 is a schematic view showing the arrangement position of the partition plate according to the present invention;
FIG. 3 is a schematic perspective view of a core structure model according to an embodiment of the present invention;
FIG. 4 is a schematic plan view of a core structure model according to an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a particular embodiment of the core structure of the present invention;
fig. 6 is a diagram illustrating a heat exchange principle of the core structure of the present invention.
In the figure: 1. the core body, 2, the sealed wall, 3, the drainage subassembly, 4, the baffling subassembly, 5, baffle.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
The hot melt type gas-liquid two-phase heat exchanger comprises a core body 1, a sealing wall 2, a drainage component 3 and a baffling component 4, and is shown in figure 1.
The core body 1 comprises a first core body and a second core body, wherein a plurality of gas flow channels and liquid flow channels are respectively arranged in the first core body and the second core body, and the gas flow channels and the liquid flow channels are both of 3D spiral channel structures; the extending length directions of the 3D spiral channels corresponding to the gas flow channel and the liquid flow channel are mutually vertical to form a dividing wall type heat exchange structure. After flowing through the liquid channel of the first core, the liquid to be heated can flow into the liquid channel of the second core through the external guide part, so that the liquid to be heated forms a U-shaped return flow direction, and the gas to be heated sequentially flows through the second core and the first core through the gas channel to complete gas-liquid heat exchange. A partition plate 5 is arranged between the first core body and the second core body. The partition 5 serves to separate the first core from the second core, see fig. 2.
The sealing wall 2 is coated around the core body 1, and is provided with a through hole matched with the inlet and the outlet of the gas flow passage.
The drainage component 3 is arranged on the top of the core body 1, and is used for introducing liquid into the liquid flow channel of the first core body and extracting the liquid in the liquid flow channel of the second core body. The drainage assembly 3 comprises an arc-shaped upper shell plate, a liquid inlet pipe and a liquid outlet pipe. Liquid to be heat-exchanged enters a cavity formed by the arc-shaped upper shell plate and the first core through the liquid inlet pipe, then the liquid to be heat-exchanged enters a liquid flow channel in the first core through the cavity, and returns to the liquid flow channel in the second core after passing through the baffling component 4. And then the liquid flows out of the liquid flow channel, enters a cavity formed by the arc-shaped upper shell plate and the second core body, and is finally output to the outside through a liquid outlet pipe.
The baffling component 4 is arranged at the bottom of the core body 1 and used for enabling the liquid in the liquid flow channel in the first core body to flow back into the liquid flow channel of the second core body. The baffle assembly 4 comprises an arc-shaped lower shell plate. Because of the design of the concave arc, a concave cavity is formed between the arc lower shell plate and the core body 1, the flow resistance is reduced to the maximum, and meanwhile, the liquid flowing downwards in the liquid flow channel of the first core body is folded upwards.
The gas flow channel and the liquid flow channel are both in periodic 3D spiral channel structures, and the corresponding screw pitches of each period of the gas flow channel and the liquid flow channel are the same. The liquid flow channels spirally extend in the vertical direction in the first core body and the second core body, so that the liquid flow channels are arranged in an array form on the horizontal section; the gas channels extend spirally in the horizontal direction in both the first core and the second core, so as to form an array arrangement on the vertical section. And the gas in any one gas flow channel exchanges heat with the liquid in all the liquid flow channels on the same vertical layer surface. The gas flow channel and the liquid flow channel are staggered on the plane and staggered in space on the configuration of dividing wall type heat exchange.
The orthogonal cross-sectional area of the gas flow channel is 1-4 times of the orthogonal cross-sectional area of the liquid flow channel, and preferably 3 times in specific implementation. The first core and the second core are both made of a heat conductive metal or non-metal material. The first core body and the second core body are both formed by additive manufacturing.
In the present embodiment, the specific core structure is constructed by a thermosoid function structure, that is, the core internal configuration realized by the thermosoid function is an example in the present invention. Wherein the term "thermo soid function knotThe generating expression in the structure' implementation case is (FIG. 3 and FIG. 4), wherein XL,YL,ZLThe whole adjustment of the whole heat exchange structure can be realized by depending on the variable parameter b, and the combination of gas-liquid volume ratios in different unit bodies is realized.
the thermosoid function surface can be generated in Mathematica software by the following statements:
B＝.；b＝1；
XL＝x-b cos[(x/2)]2
YL＝y-b cos[(x/2)]2
ZL＝z-b cos[(x/2)]2
PL＝ContourPlot3D[cos[XL]sin[YL]+cos[YL]sin[ZL]+cos[ZL]sin[XL]＝0
{x，Pi，Pi}，{y，Pi，Pi}，{z，Pi，Pi}
the heat exchange unit body formed by the function formula in the embodiment (see fig. 3) forms two mutually independent flow channels (namely a gas channel and a liquid channel), and the volume of the two channels of the unit body is measured by software, and the volume of the gas phase channel is as follows: liquid passage volume ratio 3: 1, combining the dense distribution of the structure of the thermosoid function in the space, and adding an expression Q ═ h delta T multiplied by S according to the convective heat transfer of the fluid, (h is the heat transfer coefficient (W/K.m)2) Q is heat transfer quantity, and the method for improving the heat transfer quantity is to primarily improve the gas-wall contact area, so that the gas-liquid ratio distribution form effectively improves the gas-wall contact area in unit volume, and greatly improves the heat exchange efficiency.
In the traditional wave heat exchanger, the design and the surface area of the water channel grid have no effect on the heat exchange per se. According to analysis, the heat exchanger plays roles of improving the heat exchange coefficient h by waterway turbulence, evenly dividing cooling water flow and supporting the pipe wall, but does not effectively improve the heat exchange surface area.
The thermal solid function structure in the embodiment is used for analysis, the wall surfaces of the core body structure in the embodiment can be used as heat exchange generating surfaces, so that the material utilization rate is nearly 100%, the gas-wall contact area is greatly increased, the heat exchange efficiency is increased, and the bottleneck that the heat exchange capacity of the existing heat exchanger is difficult to increase is overcome.
The specific physical structure section in this embodiment is shown in fig. 5, wherein the core structure itself forms the following features depending on the high symmetry and periodicity of the sine and cosine function combination: the gas phase channels are arranged in rows and columns according to a distribution rule similar to a sine function to form independent gas phase channels; the liquid flow channels are arranged in the residual space in the same arrangement rule. The two form independent and complete row-column combination, the adjacent relation is presented on the plane, the mutual staggered relation is presented on the space, and the two can not alternate with each other (see figure 4).
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (3)
1. A hot-melt type gas-liquid two-phase heat exchanger characterized by comprising:
the core body (1) comprises a first core body and a second core body, wherein a plurality of gas flow channels and liquid flow channels are respectively arranged in the first core body and the second core body, and the gas flow channels and the liquid flow channels are both of 3D spiral channel structures; the extending length directions of the 3D spiral channels corresponding to the gas channel and the liquid channel are mutually vertical to form a dividing wall type heat exchange structure;
the sealing wall (2) is coated on the periphery of the core body (1) and is provided with a through hole matched with the inlet and the outlet of the gas flow channel;
the drainage assembly (3) is arranged at the top of the core body (1), introduces liquid into the liquid flow channel of the first core body and leads out the liquid in the liquid flow channel of the second core body;
the baffling component (4) is arranged at the bottom of the core body (1) and is used for turning back the liquid in the liquid flow channel in the first core body and flowing the liquid into the liquid flow channel of the second core body;
a clapboard (5) is arranged between the first core body and the second core body;
the baffle assembly (4) comprises an arc-shaped lower shell plate;
the drainage assembly (3) comprises an arc-shaped upper shell plate, a liquid inlet pipe and a liquid outlet pipe;
the gas flow channel and the liquid flow channel are both in periodic 3D spiral channel structures, and the corresponding screw pitches of each period of the gas flow channel and the liquid flow channel are the same;
the liquid flow channels extend spirally in the vertical direction in the first core body and the second core body, so that the liquid flow channels are arranged in an array form on the horizontal section;
the gas channels extend spirally in the horizontal direction in the first core body and the second core body, so that the gas channels are arranged in an array form on the vertical section;
the gas in any gas flow channel exchanges heat with the liquid in all the liquid flow channels on the same vertical layer surface;
the gas flow channel and the liquid flow channel are staggered on the plane and staggered in space on the configuration of dividing wall type heat exchange.
2. The hot melt type gas-liquid two-phase heat exchanger according to claim 1, wherein an orthogonal cross-sectional area of the gas flow passage is 1 to 4 times an orthogonal cross-sectional area of the liquid flow passage.
3. The hot-melt-type gas-liquid dual-phase heat exchanger according to claim 1, wherein the hot-melt-type gas-liquid dual-phase heat exchanger is made of a heat-conducting metal or non-metal material through additive manufacturing.
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| CN202010387759.5A CN111981873B (en) | 2020-05-09 | 2020-05-09 | Hot melt type gas-liquid double-phase heat exchanger |
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| CN111981873B true CN111981873B (en) | 2021-10-08 |
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| CN102564168A (en) * | 2012-01-16 | 2012-07-11 | 华中科技大学 | Longitudinal flow shell-and-tube heat exchanger |
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| CN107990759A (en) * | 2018-01-18 | 2018-05-04 | 上海森松压力容器有限公司 | A kind of modularization heat exchange monomer and the heat exchanger using modularization heat exchange monomer |
| CN109282670A (en) * | 2017-07-19 | 2019-01-29 | 通用电气公司 | The heat exchanger of increasing material manufacturing |
| CN109496261A (en) * | 2016-06-09 | 2019-03-19 | 流体处理有限责任公司 | 3D spiral heat exchanger |
| CN110546450A (en) * | 2017-02-28 | 2019-12-06 | 通用电气公司 | Additive manufactured heat exchanger |
| CN110671961A (en) * | 2019-11-06 | 2020-01-10 | 江苏科技大学 | Multi-dimensional flow guide synergistic fin plate bundle based on additive manufacturing and heat exchanger thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9976815B1 (en) * | 2014-02-20 | 2018-05-22 | Hrl Laboratories, Llc | Heat exchangers made from additively manufactured sacrificial templates |
| US11747094B2 (en) * | 2017-05-12 | 2023-09-05 | The Boeing Company | Hollow lattice thermal energy storage heat exchanger |
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2020
- 2020-05-09 CN CN202010387759.5A patent/CN111981873B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564168A (en) * | 2012-01-16 | 2012-07-11 | 华中科技大学 | Longitudinal flow shell-and-tube heat exchanger |
| EP2775244A1 (en) * | 2013-03-05 | 2014-09-10 | The Boeing Company | Micro-lattice cross-flow heat exchangers for aircraft |
| CN109496261A (en) * | 2016-06-09 | 2019-03-19 | 流体处理有限责任公司 | 3D spiral heat exchanger |
| CN110546450A (en) * | 2017-02-28 | 2019-12-06 | 通用电气公司 | Additive manufactured heat exchanger |
| CN109282670A (en) * | 2017-07-19 | 2019-01-29 | 通用电气公司 | The heat exchanger of increasing material manufacturing |
| CN107990759A (en) * | 2018-01-18 | 2018-05-04 | 上海森松压力容器有限公司 | A kind of modularization heat exchange monomer and the heat exchanger using modularization heat exchange monomer |
| CN110671961A (en) * | 2019-11-06 | 2020-01-10 | 江苏科技大学 | Multi-dimensional flow guide synergistic fin plate bundle based on additive manufacturing and heat exchanger thereof |
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| CN111981873A (en) | 2020-11-24 |
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