CN107941057A - Heat exchanger with bionical fractal structure - Google Patents
Heat exchanger with bionical fractal structure Download PDFInfo
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- CN107941057A CN107941057A CN201711046682.XA CN201711046682A CN107941057A CN 107941057 A CN107941057 A CN 107941057A CN 201711046682 A CN201711046682 A CN 201711046682A CN 107941057 A CN107941057 A CN 107941057A
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- bypass duct
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- heat exchanger
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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
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
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- Engineering & Computer Science (AREA)
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
A kind of heat exchanger with bionical fractal structure of technical field of heat exchange equipment, copies human vas structure to etch a plurality of parallel port on substrate, several point of shape unit is in series with every passage.Each divides shape unit to be symmetrical diamond shape multistage fractal structure, including zero level bypass duct, level-one bypass duct, two level bypass duct and three-level bypass duct.Each grade of fractal structure is the next stage bypass duct for being divided into two minor diameters by the upper level bypass duct of a major diameter, is then pooled again in major diameter bypass duct, and the diameter and length of upper level bypass duct and next stage bypass duct meet fractal principle.Dividing at one-to-two bifurcation of the shape unit per level-one, using acute angle as bifurcation angle, to reduce flow resistance of the fluid in passage.Whole bionical point of needle recuperator further includes deck portion, by welding by cover board together with substrate mounting, forms runner cavity.
Description
Technical field
The present invention relates to a kind of technology of field of heat exchange equipment, is specifically a kind of heat exchange with bionical fractal structure
Device.
Background technology
In electronic radiation field, widely used heat exchanger to carry out radiating and cooling to electronic chip.Divide needle recuperator
Mentality of designing is that major diameter passage is divided into the secondary channel of multiple minor diameters with certain Branch Angle in each stage.It is existing
Divide needle recuperator to divide needle recuperator for right angle, its secondary channel is rectangular in shape with higher level's passage, as shown in Figure 1, every grade of passage
For one-to-two form, secondary channel is rectangular in shape with higher level's passage.Since refrigerant fluid during right-angled bend by that can run into
Larger flow resistance, thus in existing point of needle recuperator fluid pressure drop it is larger.
The content of the invention
The present invention for fluid-pressure drop in existing point of needle recuperator it is big the problem of, propose a kind of with bionical fractal structure
Heat exchanger, by using for reference human vas network structure, i.e. artery is divided into some using acute angle bifurcation structure in every arterial channel
Capillary merges into vein again, by copying efficient caloic transmittance process of the blood in whole human body, and blood flow mistake
The advantages of drag losses of journey is small, will not cause excessive burden to heart, existing point of needle recuperator of the invention high heat-sinking capability,
The pressure drop of fluid can be effectively reduced again.
The present invention is achieved by the following technical solutions：
The present invention includes：Import main line on substrate, outlet main line are arranged at, and a plurality of is arranged in parallel therebetween logical
Road, wherein：Connect on each passage several point of shape unit；This point of shape unit includes：The main line and difference of diamond structure
The bye-pass for two quadrilateral structures being arranged in main line.
The length and diameter of the bypass ducts at different levels of point shape unit meet fractal principle, wherein：Zero level branch
The diameter D of road pipe0, length L0With the diameter D of level-one bypass duct1, length L1Meet：L1=L0γ and D1=D0β, level-one bypass duct
Diameter D1, length L1With the diameter D of two level bypass duct2, length L2Meet：L2=L1γ and D2=D1β；Two level bypass duct it is straight
Footpath D2, length L2With the diameter D of three-level bypass duct3, length L3Meet：L3=L2γ and D3=D2β；γ represents fractal length ratio, β
Expression divides shape diameter ratio.
Branch Angle in the diamond structure is preferably acute angle to reduce flow resistance of the fluid in passage.
Cover board is further provided with the substrate of the heat exchanger, the cover board and substrate are planar rectangular structure, are used
Metal uses laser ablation fluid passage as material on substrate, is fitted together substrate and cover board by welding, and forms stream
Road cavity.
Technique effect
Compared with prior art, the present invention uses for reference human vas structure in fractal structure, using acute angle as at different levels
Bifurcation angle, significantly reduces heat exchanger entirety pressure drop；The present invention is added by the way of point shape unit of connecting on parallel port
The number of minor diameter pipeline in heat exchanger, improves the coefficient of heat transfer in every minor diameter pipeline, is entirely changed so as to improve
The exchange capability of heat of hot device.
Brief description of the drawings
Fig. 1 divides at existing right angle the structure diagram of needle recuperator；
Fig. 2 human vas network element structures schematic diagrames；
Fig. 3 schematic structural views of the invention；
Fig. 4 bionical point of shape unit symmetrical structure schematic diagram of the present invention；
Fig. 5 bionical point of needle recuperator three-dimensional overall structure diagram of the present invention；
Bionical point of needle recuperator of Fig. 6 present invention and existing point of needle recuperator performance comparison figure；
In figure：1 heat exchanger substrate, 2 imports supervisor, 3 import separating tubes, 4 zero level bypass ducts, 5 level-one bypass ducts, 6 two levels
Bypass duct, 7 three-level bypass ducts, 8 outlet collector tubes, 9 outlet headers, 10 heat exchanger cover boards.
Embodiment
As shown in Fig. 2, the present embodiment has used for reference the Geometric Fractal structure of human vas network, one kind is devised such as Fig. 3 institutes
The bionical point of needle recuperator shown, including：Heat exchanger substrate 1 and heat exchanger cover board 10, the passage on substrate include intake header 2,
Import separating tube 3, zero level bypass duct 4, level-one bypass duct 5, two level bypass duct 6, three-level bypass duct 7, outlet collector tube 8 and outlet
Manifold 9, wherein：Intake header 2 is connected with import separating tube 3, and import separating tube 3 is by fluid by being divided into 2-20 zero level branch all the way
Road pipe 4, the present embodiment use 8 zero level bypass ducts.
Further, the bionical fractal structure unit of 3-20 series connection is included in each zero level bypass duct, the present embodiment is adopted
With the bionical unit of 4 series connection, this divides shape unit to be bilateral symmetry, can be made of per side structure some grades of bypass ducts
(shown in Fig. 4), including zero level bypass duct 4, level-one bypass duct 5, the level Four fractal structure of two level bypass duct 6 and three-level bypass duct 7.
Further, bionical point of shape unit is by zero level bypass duct 4, it is changed into one-to-two form at node, is divided into two
A level-one bypass duct 5, two level-one bypass ducts 5 are further continued for being divided into four two level bypass ducts 6 downwards, and four two level bypass ducts 6 are again
Two level-one bypass ducts 5 are merged into, two level-one bypass ducts 5 are remerged as a zero level bypass duct 4.
Further, any acute angle between the structure is at point shape node of every level-one using 0 °~90 °, which is used as, divides shape
Angle, the present embodiment use 75 °.The length of bypass ducts at different levels and the size of diameter meet fractal principle, zero level bypass duct
Diameter D0, length L0With the diameter D of level-one bypass duct1, length L1Meet：D1=D0β and L1=L0γ, the diameter of level-one bypass duct
D1, length L1With the diameter D of two level bypass duct2, length L2Meet：D2=D1β and L2=L1γ；The diameter D of two level bypass duct2, it is long
Spend L2With the diameter D of three-level bypass duct3, length L3Meet：L3=L2γ and D3=D2β；γ represents fractal length ratio, and β represents to divide
Shape diameter ratio.In the present embodiment, D0、L0, γ and β take 2mm, 20mm, 0.794 and 0.5 respectively.
Further, each zero level branch 4 is connected with outlet collector tube 8, and outlet collector tube 8 is connected with outlet header 9 again.
Further, which is flat type, and heat exchanger substrate 1 and heat exchanger cover board 10 are surrounding
There is the rectangular configuration of fillet, size is identical (shown in Fig. 5).
Further.Heat exchanger uses metal as material, by welding 10 groups of heat exchanger substrate 1 and heat exchanger cover board
It is fitted together, so as to form closed cavity.
Further, needle recuperator (see Fig. 1) and the present invention are divided using the CFD software existing right angle identical to apparent size
The bionical point of needle recuperator (see Fig. 3) proposed carries out performance simulation.Wherein, existing right angle divides needle recuperator to include six fraction shapes altogether
Structure, zero level pipe diameter 2mm, length 20mm, the diameter ratio of pipelines at different levels is 0.794, and length ratio is 0.5, divides shape angle
180°；Bionical point of needle recuperator proposed by the present invention is 4 × 8 array structure, altogether including 32 points of shape units, each unit bag
3 grades of fractal structures are included, zero level pipe diameter 2mm, length 20mm, the diameter ratio of pipelines at different levels is 0.794, and length ratio is 0.5,
Divide 75 ° of shape angle.
Further, calculate and use the incompressible model of three-dimensional steady state laminar flow；Entrance boundary condition is speed entrance, outlet
Boundary condition is pressure export, and wall is to determine wall temperature border.
Further, simulation operating mode includes inlet flow rate, inlet water temperature and wall surface temperature.Wherein, inlet flow rate scope is
0.5-1.5m/s；Inlet water temperature is 300K；Wall surface temperature is 333K.
Further, in the case where heat exchange amount is identical, when heat exchange amount is increased to 1400W from 800W, the present invention proposes
Bionical point of needle recuperator divide needle recuperator to compare with existing right angle, pressure drop reduce by 24.8% to 34.6%；It is identical in pressure drop
In the case of, when pressure drop is increased to 1800Pa from 450Pa, bionical point of needle recuperator proposed by the present invention and existing right angle point shape are changed
Hot device is compared, and heat exchange amount improves 11.8% to 15.4%.(see Fig. 6) is proposed by the present invention imitative according to above analog result
Needle recuperator estranged divides needle recuperator to reach the pressure drop of smaller and the heat exchange amount of higher than existing right angle.
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode carry out local directed complete set to it, protection scope of the present invention is subject to claims and not by above-mentioned specific implementation institute
Limit, each implementation in the range of it is by the constraint of the present invention.
Claims (5)
1. a kind of heat exchanger with bionical fractal structure, it is characterised in that the import main line that is arranged on substrate, go out dry
Road, and a plurality of passage being arranged in parallel therebetween, several point of shape unit of connecting on each passage；This point of shape unit includes：
The bye-pass of the main line of diamond structure and two quadrilateral structures being respectively arranged in main line, wherein bypass duct at different levels
Length and diameter meet the diameter D of fractal principle, i.e. zero level bypass duct0, length L0With the diameter of level-one bypass duct
D1, length L1Meet：L1=L0γ and D1=D0β, the diameter D of level-one bypass duct1, length L1With the diameter D of two level bypass duct2, it is long
Spend L2Meet：L2=L1γ and D2=D1β；The diameter D of two level bypass duct2, length L2With the diameter D of three-level bypass duct3, length L3
Meet：L3=L2γ and D3=D2β；γ represents fractal length ratio, and β represents to divide shape diameter ratio.
2. the heat exchanger according to claim 1 with bionical fractal structure, it is characterized in that, in the diamond structure
Branch Angle is acute angle to reduce flow resistance of the fluid in passage.
3. the heat exchanger according to claim 1 or 2 with bionical fractal structure, it is characterized in that, the quadrangle knot
Structure is diamond shape.
4. the heat exchanger according to claim 1 with bionical fractal structure, it is characterized in that, the substrate of the heat exchanger
On be further provided with cover board, the cover board and substrate are planar rectangular structure.
5. the heat exchanger according to claim 4 with bionical fractal structure, it is characterized in that, using sharp on the substrate
Photoengraving fluid passage, is fitted together substrate and cover board by welding, and forms runner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046682.XA CN107941057A (en) | 2017-10-31 | 2017-10-31 | Heat exchanger with bionical fractal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711046682.XA CN107941057A (en) | 2017-10-31 | 2017-10-31 | Heat exchanger with bionical fractal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107941057A true CN107941057A (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711046682.XA Pending CN107941057A (en) | 2017-10-31 | 2017-10-31 | Heat exchanger with bionical fractal structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579575A (en) * | 2018-11-16 | 2019-04-05 | 大连海事大学 | Divide shape channel printed circuit sheet heat exchanger |
| CN109801887A (en) * | 2019-03-19 | 2019-05-24 | 江苏唯益换热器有限公司 | Fractal micro-channel heat exchanger |
| CN110174017A (en) * | 2019-04-30 | 2019-08-27 | 东南大学 | A kind of phase-change energy storage device and recycle heat utilize system |
| CN110218095A (en) * | 2019-04-02 | 2019-09-10 | 武汉理工大学 | A kind of preparation method of the high effective heat-storage unit based on grade hole ceramics |
| CN114162308A (en) * | 2021-12-28 | 2022-03-11 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Structure for cooling wing leading edge shell |
| CN114824568A (en) * | 2022-05-17 | 2022-07-29 | 江苏大学 | Bionic runner structure liquid cooling plate for lithium ion battery pack |
| CN115603598A (en) * | 2022-10-21 | 2023-01-13 | 重庆中车时代电气技术有限公司（Cn） | Liquid cooling rectifier module press-fitting assembly and liquid cooling rectifier module |
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| JPS5929992A (en) * | 1982-08-13 | 1984-02-17 | Hitachi Ltd | Stacked type heat exchanger |
| CN1244913A (en) * | 1997-01-27 | 2000-02-16 | 本田技研工业株式会社 | Heat exchanger |
| CN2699434Y (en) * | 2004-03-12 | 2005-05-11 | 南京理工大学 | Micro pipe network heat exchanger imitating mammal's respiratory system |
-
2017
- 2017-10-31 CN CN201711046682.XA patent/CN107941057A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5929992A (en) * | 1982-08-13 | 1984-02-17 | Hitachi Ltd | Stacked type heat exchanger |
| CN1244913A (en) * | 1997-01-27 | 2000-02-16 | 本田技研工业株式会社 | Heat exchanger |
| CN2699434Y (en) * | 2004-03-12 | 2005-05-11 | 南京理工大学 | Micro pipe network heat exchanger imitating mammal's respiratory system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109579575B (en) * | 2018-11-16 | 2023-09-19 | 大连海事大学 | Fractal Channel Printed Circuit Board Heat Exchanger |
| CN109579575A (en) * | 2018-11-16 | 2019-04-05 | 大连海事大学 | Divide shape channel printed circuit sheet heat exchanger |
| CN109801887A (en) * | 2019-03-19 | 2019-05-24 | 江苏唯益换热器有限公司 | Fractal micro-channel heat exchanger |
| CN109801887B (en) * | 2019-03-19 | 2023-10-31 | 江苏唯益换热器有限公司 | Fractal micro-channel heat exchanger |
| CN110218095A (en) * | 2019-04-02 | 2019-09-10 | 武汉理工大学 | A kind of preparation method of the high effective heat-storage unit based on grade hole ceramics |
| CN110218095B (en) * | 2019-04-02 | 2021-11-16 | 武汉理工大学 | Preparation method of efficient heat storage unit based on hierarchical pore ceramic |
| CN110174017B (en) * | 2019-04-30 | 2021-03-19 | 东南大学 | Phase change energy storage device and heat cyclic utilization system |
| CN110174017A (en) * | 2019-04-30 | 2019-08-27 | 东南大学 | A kind of phase-change energy storage device and recycle heat utilize system |
| CN114162308A (en) * | 2021-12-28 | 2022-03-11 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Structure for cooling wing leading edge shell |
| CN114162308B (en) * | 2021-12-28 | 2024-02-02 | 沈阳飞机设计研究所扬州协同创新研究院有限公司 | Structure for cooling wing leading edge shell |
| CN114824568A (en) * | 2022-05-17 | 2022-07-29 | 江苏大学 | Bionic runner structure liquid cooling plate for lithium ion battery pack |
| CN115603598A (en) * | 2022-10-21 | 2023-01-13 | 重庆中车时代电气技术有限公司（Cn） | Liquid cooling rectifier module press-fitting assembly and liquid cooling rectifier module |
| CN115603598B (en) * | 2022-10-21 | 2024-03-15 | 重庆中车时代电气技术有限公司 | Liquid cooling rectifier module pressure equipment subassembly and liquid cooling rectifier module |
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Application publication date: 20180420 |
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