CN110595240A - Large-scale ring type pulsating heat pipe - Google Patents
Large-scale ring type pulsating heat pipe Download PDFInfo
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- CN110595240A CN110595240A CN201910837106.XA CN201910837106A CN110595240A CN 110595240 A CN110595240 A CN 110595240A CN 201910837106 A CN201910837106 A CN 201910837106A CN 110595240 A CN110595240 A CN 110595240A
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
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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
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
- F28F13/182—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing especially adapted for evaporator or condenser surfaces
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention belongs to the field of passive heat transfer, and relates to a large-scale ring type pulsating heat pipe, which comprises an inner pipe 1, an outer pipe 2, a metal wire 3, a copper ring 4, a sealing ring 5, a gas-liquid channel 6 and a U-shaped elbow channel 7; the inner tube 1 and the outer tube 2 are coaxially arranged, a metal wire 3 with the diameter slightly smaller than the thickness of an annular gap penetrates through the annular gap formed between the inner tube 1 and the outer tube 2, the metal wire 3 is tightly attached to the inner tube 1 and the outer tube 2 by adopting a mechanical method, a copper ring 4 and a sealing ring 5 are respectively sleeved on two sides of the inner tube 1 in sequence, and then the two sides are welded and sealed into a whole; a liquid filling pipe is welded on the copper ring 4 on one side. The large-scale annular pulsating heat pipe has the advantages of high space utilization rate, high heat flow density, good heat transfer efficiency and heat transfer limit, stable operation, flexible installation and arrangement, excellent antigravity operation characteristic, easy realization of large-scale of a single pulsating heat pipe and centralized arrangement of a plurality of heat pipes, compact structure, small volume, light weight and low cost, and is suitable for industrial mass production.
Description
Technical Field
The invention relates to a ring-type pulsating heat pipe which can be used for nuclear energy, solar energy and geothermal energy utilization, waste heat recovery, aerospace, high-power electronic equipment cooling and the like and relates to large-scale, high-heat-flow and high-power energy exchange occasions, belonging to the technical field of passive heat transfer.
Background
With the progress of science and technology, the heat design technology for heat dissipation in high heat flow environment becomesAn important factor limiting the technological development. The advent of the "big data" era has led to the need for data centers that concentrate more electronic devices in a limited space to process increasing amounts of information data, with the heat flux density resulting from their heat generation also increasing dramatically. In addition, the heat flux density of the nuclear reactor cooling technology and the laser cooling technology which are required in the recent period will reach 300W/cm2～500W/cm2A thermal design means with high heat transfer efficiency and good reliability is needed to meet the challenge of high heat flux density. In the aerospace field, generally, the external temperature fluctuation of a spacecraft is-150 ℃ to 150 ℃, and the normal working temperature range of instruments and equipment in the spacecraft is-15 ℃ to 50 ℃, so that a reliable thermal design means is required.
In order to solve the above problems, the conventional active cooling method using heat dissipation fins and forced air convection cannot utilize latent heat for heat exchange, and thus the heat dissipation capability of the active cooling method is close to the limit, and the active cooling method cannot meet the heat dissipation requirements of the current and future products. The heat pipe cooling is a main mode of high-power heat dissipation due to the simple structure, stable operation and good heat transfer effect. The loop heat pipe can realize energy transfer in a longer distance and can overcome the influence of gravity, so that the loop heat pipe has wide application in the field of aerospace, and the gravity heat pipe can realize energy transfer in high power and is limited by the influence of gravity, so that the loop heat pipe is sensitive to the installation angle. The pulsating heat pipe is used as a novel energy transfer tool, and can realize high-speed oscillation of working media in the pipe under the working condition, so that higher heat transfer equivalent weight is realized, and meanwhile, the dependence degree of the pulsating heat pipe on gravity is reduced due to the fact that the effect of capillary force in the pipe is greater than that of gravity. When the number of the elbows of the pulsating heat pipe is more, the normal operation under microgravity or zero gravity can be realized, but the structure of the heat pipe is looser and a larger space is needed for arranging the pulsating heat pipe. At present, the general structure and power of the pulsating heat pipe are small, the large-scale application of the pulsating heat pipe needs high-power heat transfer and long-distance transmission, more channels and bends are required to be formed in a limited space by the pulsating heat pipe, and the difficulty in improving the existing pulsating heat pipe to achieve the purpose is high. The thermal stress generated by the uneven temperature distribution among the channels of the pulsating heat pipe makes the long-term stable operation difficult and also makes the large-scale industrial production difficult to realize.
The large-scale ring-type pulsating heat pipe provided by the invention has a compact structure, can form more elbows in a limited space, is beneficial to microgravity or gravity-free operation of the pulsating heat pipe, is beneficial to meeting the appearance requirement of the pulsating heat pipe in a large-scale heat transfer scene, and can meet the requirement of a single pulsating heat pipe on the maximum power of kilowatt level, thereby meeting the requirements of large-scale application on the structure and performance.
Disclosure of Invention
In order to overcome a series of defects in the prior art, the present invention provides a large-scale ring-type pulsating heat pipe to solve the problems in the background art.
The invention discloses a large-scale ring type pulsating heat pipe which comprises an inner pipe 1, an outer pipe 2, a metal wire 3, a copper ring 4, a sealing ring 5, a gas-liquid channel 6 and a U-shaped elbow channel 7;
the inner pipe 1 and the outer pipe 2 are coaxially arranged, a metal wire 3 with the diameter slightly smaller than the thickness of an annular gap penetrates through the annular gap formed between the inner pipe 1 and the outer pipe 2, the metal wire 3 is tightly attached to the inner pipe 1 and the outer pipe 2 by adopting a mechanical method, a copper ring 4 and a sealing ring 5 are respectively sleeved on two sides of the inner pipe 1 in sequence, and then the two sides are welded and sealed into a whole;
the inner diameter and the outer diameter of the copper ring 4 are consistent with those of the outer pipe 2, a liquid filling pipe is welded on the copper ring 4 on one side, and the liquid filling pipe is used for vacuumizing and filling liquid of the ring-type pulsating heat pipe;
the outer diameter of the sealing ring 5 is the same as that of the outer pipe 2, the inner diameter of the sealing ring is the same as that of the inner pipe 1, a square through hole is drilled in the end face of the sealing ring 5 for the metal wire 3 to penetrate out, and the position of the through hole corresponds to that of the metal wire 3 in the axial direction.
Preferably, after the ring-type pulsating heat pipe is flattened from three dimensions to two dimensions along the circumferential direction, the inner wires 3 are distributed as follows: one end of each metal wire 3 exceeds the inner pipe 1 spread out to be a plane until penetrating into the through hole in the sealing ring 5, the other end of each metal wire 3 keeps a distance of 4-6mm from the end face of the inner pipe 1, and a U-shaped elbow channel 7 is constructed at one end of the pulsating heat pipe by any continuous 3 metal wires 3, the inner pipe 1, the outer pipe 2, the copper ring 4 and the sealing ring 5.
Preferably, the metal wire 3 forms a sharp angle area with the wall surfaces of the inner tube 1 and the outer tube 2, and provides a larger liquid backflow capillary driving force in a limited space to maintain the thickness of the wall surface liquid film.
Preferably, the metal wires 3 are uniformly distributed along the circumferential direction or non-uniformly distributed in a specified manner in the annular gap between the inner tube 1 and the outer tube, and the equivalent diameter D of the channel formed by the adjacent metal wires 3 and the annular gap satisfies the following formula, and according to the dimensions of the inner tube 1 and the outer tube 2 of the outer tube and the metal wires 3 provided above, the equivalent diameter of the channel is about 1mm, which satisfies the formula requirement:
wherein g is the gravity acceleration, D represents the channel equivalent diameter, sigma, rhog，ρlThe surface tension coefficient of the selected working medium and the gas-liquid phase density thereof are respectively.
Preferably, the U-bend is implemented as follows: selecting one side of the large-scale ring type pulsating heat pipe, cutting off one metal wire 3 along the end face of the outer pipe 2 by using a water gap clamp 98 at a reserved gap between the copper ring 4 and the outer pipe 2, and then cutting off one metal wire 3 every other metal wire 3, so that the cut-off metal wires 3 and the uncut metal wires 3 are distributed at intervals. And treating the metal wires 3 on the other side of the large-scale ring type pulsating heat pipe in the same way, so that one side of each copper wire 3 is sheared, and the other side of each copper wire 3 is not sheared.
Preferably, the working medium of the large-scale annular pulsating heat pipe is deionized water, acetone, methanol, ethanol, nano fluid or a multi-element mixed solution, and the liquid filling rate is 30-80%. .
Preferably, the large-scale ring-type pulsating heat pipe is divided into a heating section 9, a heat insulation section 10 and a condensation section 11;
the surface of the internal channel of the heating section 9 is subjected to hydrophilic/super-hydrophilic modification treatment to improve the evaporation heat transfer coefficient;
the surface of the internal channel of the condensation section 11 is subjected to hydrophobic/super-hydrophobic modification treatment to improve the condensation heat transfer effect.
Preferably, the outer diameter of the inner tube 1 is 18mm, the wall thickness is 1mm, the length is 1300mm, the outer diameter of the outer tube 2 is 22mm, the wall thickness is 0.8mm, the length is 1200mm, and the diameter of the metal wire 3 is 1mm, and the total number is 26.
Preferably, the material of the inner tube 1 and the metal wire 3 is a metal having a certain ductility, and the material of the outer tube 2 may be a metal or a nonmetal.
Preferably, the material of the inner tube 1 and the metal wire 3 is one of copper and titanium, and the material of the outer tube 2 is one of stainless steel, aluminum, copper and glass.
The large-scale ring type pulsating heat pipe has the following beneficial effects:
(1) the space utilization rate is high, the structural form expands the large-scale application scene of the pulsating heat pipe, and the maximum power of a single pulsating heat pipe can reach kilowatt level, so that the large-scale application is met in the aspects of structure and performance. A large-scale pulsating heat pipe heat exchanger can be formed by flexibly arranging a plurality of pulsating heat pipes, and the energy transfer with larger power is realized.
(2) The smaller hydraulic diameter of the channel provides larger capillary force, so that the influence of gravity on an air plug and a liquid plug formed in the channel is smaller, and the channel has good antigravity and microgravity operation characteristics and can be suitable for various complex heat exchange conditions.
(3) All inside passageways are evenly distributed in space, and the temperature uniformity of circumferential position is good, has reduced the harm of the thermal stress of the inhomogeneous production of being heated to the heat pipe material, avoids arousing the heat transfer inefficacy, ensures that the long-time steady operation of pulsation heat pipe can be realized.
(4) The metal wire and the wall surfaces of the inner pipe and the outer pipe form a sharp angle area, a larger capillary pressure difference is generated in the axial direction, and a larger capillary driving force is provided to maintain the thickness of a liquid film on the wall surface, so that the energy exchange with the outside is enhanced, the heat transfer efficiency and the heat transfer limit are improved, and the heat transfer with higher heat flow density and higher power is realized.
(5) The heat pipe heat dissipation device has the characteristics of high space utilization rate, high heat flow density, high heat transfer efficiency, high heat transfer limit, stable operation, flexible installation and the like, has excellent antigravity operation characteristic, is suitable for heat dissipation at various angles, and is easy to realize the large-scale of a single heat pipe and the centralized arrangement of a plurality of heat pipes. And the structure is compact, the volume is small, the weight is light, the cost is low, and the method is suitable for mass industrial production.
Drawings
FIG. 1 is an overall schematic diagram of a loop pulsating heat pipe.
FIG. 2 is a schematic diagram of the distribution of internal copper wires when the ring-type pulsating heat pipe is flattened from three-dimensional to two-dimensional along the circumferential direction.
FIG. 3 is a cross-sectional view of a portion of a channel of a ring-type pulsating heat pipe.
Fig. 4 is a schematic diagram of a process of trimming copper wires to construct a U-shaped elbow channel.
The reference numbers in the figures are:
description of reference numerals:
1-inner tube, 2-outer tube, 3-metal wire, 4-copper ring, 5-sealing ring, 6-gas-liquid circulation channel, 7-U-shaped elbow channel, 8-water gap clamp, 9-heating section, 10-heat insulation section, 11-condensation section, and W-center distance.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments and the directional terms described below with reference to the drawings are exemplary and intended to be used in the explanation of the invention, and should not be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In one broad embodiment of the invention, as shown in fig. 1, a large-scale ring-type pulsating heat pipe comprises an inner pipe 1, an outer pipe 2, a metal wire 3, a copper ring 4, a sealing ring 5, a gas-liquid channel 6 and a U-bend channel 7. The inner pipe 1 and the outer pipe 2 are coaxially arranged, a metal wire 3 with the diameter slightly smaller than the thickness of an annular gap penetrates through the annular gap formed between the inner pipe 1 and the outer pipe 2, the metal wire 3 is tightly attached to the inner pipe 1 and the outer pipe 2 by adopting a mechanical method, such as means of diffusion welding, pipe expansion and the like, a copper ring 4 and a sealing ring 5 are respectively sleeved on two sides of the inner pipe 1 in sequence, and then the two sides are welded and sealed into a whole.
The outer diameter of inner tube 1 is 18mm, and the wall thickness is 1mm, and length is 1300mm, outer tube 2 external diameter is 22mm, and the wall thickness is 0.8mm, and length is 1200mm, 3 diameters of wire are 1mm, totally 26, the material of inner tube 1, wire 3 is the metal that has certain ductility, for example metal such as copper, titanium, and the material of outer tube 2 can be the metal, for example be metal such as stainless steel, aluminium, copper, also can be nonmetal, for example glass, is favorable to visual research. The integral material of the annular pulsating heat pipe is required to ensure that the shell material is compatible with the working medium selected by the pulsating heat pipe. The inner diameter and the outer diameter of the copper ring 4 are consistent with those of the outer pipe 2 and are 3-4 mm high, a liquid filling pipe is welded on the copper ring 4 on one side in a perforated mode, and the liquid filling pipe is used for vacuumizing and liquid injection of the ring type pulsating heat pipe. The outer diameter of the sealing ring 5 is the same as that of the outer pipe 2, the inner diameter of the sealing ring is the same as that of the inner pipe 1, a square through hole with the width of 1.1mm is drilled in the end face of the sealing ring 5 and is used for the metal wire 3 to penetrate out, and the position of the through hole corresponds to that of the metal wire 3 in the axial direction.
After the ring-type pulsating heat pipe is flattened into a two-dimensional plane from three dimensions along the circumferential direction, the distribution of the internal metal wires 3 is schematically shown in fig. 2, one end of each metal wire 3 exceeds the inner pipe 1 which is spread into the plane until penetrating into a through hole (not shown in fig. 2) in the sealing ring 5, the other end of each metal wire 3 keeps a distance of 4-6mm from the end surface of the inner pipe 1, and a U-shaped elbow channel (7) can be constructed at one end of the pulsating heat pipe by any continuous 3 metal wires (3), the inner pipe (1), the outer pipe (2), the copper ring (4) and the sealing ring (5).
As shown in fig. 3, the metal wire 3 forms a sharp corner region with the wall surfaces of the inner tube 1 and the outer tube 2, and provides a large liquid reflux capillary driving force in a limited space, so that liquid reflux is promoted, the thickness of a liquid film on the wall surface is maintained, energy exchange with the outside is enhanced, heat transfer efficiency and heat transfer limit are improved, and heat transfer with higher heat flux density and higher power is realized. The metal wires 3 can be uniformly distributed along the circumferential direction, and also can be non-uniformly distributed in an annular gap between the inner tube 1 and the outer tube according to a specified mode, the equivalent diameter D of a channel formed by the adjacent metal wires 3 and the annular gap can meet the following formula limitation, and according to the sizes of the inner tube 1, the outer tube 2 and the metal wires 3 provided above, the equivalent diameter of the channel is about 1mm, and the formula requirement is met:
wherein g is the gravitational acceleration, D represents the equivalent diameter, σ, ρg，ρlThe surface tension coefficient of the selected working medium and the gas-liquid phase density thereof are respectively.
As shown in fig. 4, the U-bend is implemented as follows: and (3) selecting one side of the large-scale ring type pulsating heat pipe, cutting off one metal wire 3 at a gap reserved between the copper ring 4 and the outer pipe 2 by using a water-jet pliers 8 along the end surface of the outer pipe 2, and then cutting off one metal wire 3 every other metal wire 3, so that the cut metal wires 3 and the uncut copper wires 3 are distributed at intervals. And treating the metal wires 3 on the other side of the large-scale ring type pulsating heat pipe in the same way, so that one side of each copper wire 3 is sheared, and the other side of each copper wire 3 is not sheared.
The working medium of the large-scale annular pulsating heat pipe is preferably high (dP/dT)satThe working medium with low value, low viscosity, low latent heat and large specific heat can be deionized water, acetone, methanol, ethanol, nano fluid or multi-component mixed solution. In the embodiment, deionized water is used as the working medium, and the filling rate is 40-80%.
The large-scale ring type pulsating heat pipe is divided into a heating section 9, a heat insulation section 10 and a condensation section 11.
The surface of the internal channel of the heating section 9 can be subjected to super-hydrophilic modification treatment by adopting a redox method, an electrochemical method, a vapor deposition method or a self-assembly method, so that the spreading area of the thin liquid film can be increased, the thickness of the thin liquid film is reduced, and the evaporation heat transfer coefficient is improved.
The inner channel of the condensation section 11 can be subjected to super-hydrophobic modification treatment by an etching method, a vapor deposition method, a self-assembly method, an oxidation method or a chemical corrosion method, so that the pulling force of the wall surface to the liquid plug can be obviously reduced, the frictional resistance between the wall surface of the channel and the gas-liquid plug is reduced, and the condensation heat transfer effect is improved.
The working principle of the large-scale annular pulsating heat pipe is as follows:
after the interior of the heat pipe is vacuumized and the working medium is injected, the diameter of the formed working medium circulation channel is small, and air plugs and liquid plugs are randomly distributed in the channel under the action of surface tension. When heat is input into the heating section 9, along with the expansion of the existing gas plug and the generation of nucleation bubbles, the pressure of the heating section 9 is increased to push the gas-liquid plug to flow to the condensing section 11, and meanwhile, due to the imbalance of the pressure of adjacent channels, the gas-liquid plug flows back to the heating section 9 through the U-shaped elbow to complete a cycle.
Finally, it should be pointed out that: the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A large-scale ring type pulsating heat pipe is characterized by comprising an inner pipe (1), an outer pipe (2), a metal wire (3), a copper ring (4), a sealing ring (5), a gas-liquid channel (6) and a U-shaped elbow channel (7);
the inner pipe (1) and the outer pipe (2) are coaxially arranged, a metal wire (3) with the diameter being slightly smaller than the thickness of the annular gap penetrates through the annular gap formed between the inner pipe (1) and the outer pipe (2), the metal wire (3) is tightly attached to the inner pipe (1) and the outer pipe (2) by a mechanical method, a copper ring (4) and a sealing ring (5) are respectively sleeved on two sides of the inner pipe (1) in sequence, and then the two sides are welded and sealed into a whole;
the inner diameter and the outer diameter of the copper ring (4) are consistent with those of the outer pipe (2), a liquid filling pipe is welded on the copper ring (4) on one side in a hole mode, and the liquid filling pipe is used for vacuumizing and filling liquid of the ring-type pulsating heat pipe;
the outer diameter of the sealing ring (5) is the same as that of the outer pipe (2), the inner diameter of the sealing ring is the same as that of the inner pipe (1), a square through hole is drilled in the end face of the sealing ring (5) and used for the metal wire (3) to penetrate out, and the position of the through hole corresponds to that of the metal wire (3) in the axial direction.
2. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein the inner wires (3) are distributed as follows after the ring-type pulsating heat pipe is flattened from three-dimensional to two-dimensional along the circumferential direction: one end of each metal wire (3) exceeds the inner pipe (1) spread out to be a plane until penetrating into the through hole in the sealing ring (5), the other end of each metal wire keeps a distance of 4-6mm from the end face of the inner pipe (1), and a U-shaped elbow channel (7) is constructed at one end of the pulsating heat pipe by any 3 continuous metal wires (3), the inner pipe (1), the outer pipe (2), the copper ring (4) and the sealing ring (5).
3. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein the metal wire (3) forms a sharp angle region with the wall surface of the inner pipe (1) and the outer pipe (2) to provide a larger capillary driving force for liquid backflow in a limited space and maintain the thickness of the liquid film on the wall surface.
4. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein said metal wires (3) are uniformly distributed along the circumferential direction or non-uniformly distributed in a specified manner in the annular gap between the inner pipe (1) and the outer pipe (2), and the equivalent diameter D of the channel formed by the adjacent metal wires (3) and the annular gap satisfies the following formula:
wherein g is gravity acceleration and D represents channel equivalent diameter，σ，ρgRhol is the surface tension coefficient of the selected working medium and its gas and liquid density.
5. The large-scale ring type pulsating heat pipe as claimed in claim 1 or 2, wherein said U-bend is implemented as follows: selecting one side of the large-scale ring type pulsating heat pipe, cutting off one metal wire (3) at a reserved gap between a copper ring (4) and an outer pipe (2) by using a water gap clamp (8) along the end surface of the outer pipe (2), and cutting off one metal wire (3) every other metal wire (3) to ensure that the cut metal wires (3) and the uncut metal wires (3) are distributed at intervals; and treating the metal wires (3) on the other side of the large-scale ring type pulsating heat pipe in the same way, so that one side of each copper wire (3) is sheared, and the other side of each copper wire (3) is not sheared.
6. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein the working medium of the large-scale ring-type pulsating heat pipe is deionized water, acetone, methanol, ethanol, nanofluid or a multi-component mixed solution, and the liquid filling rate is 30% -80%.
7. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein said large-scale ring-type pulsating heat pipe is divided into a heating section (9), a heat insulation section (10), and a condensing section (11);
the surface of the internal channel of the heating section (9) is subjected to hydrophilic/super-hydrophilic modification treatment to improve the evaporation heat transfer coefficient;
and the surface of the internal channel of the condensation section (11) is subjected to hydrophobic/super-hydrophobic modification treatment to improve the condensation heat transfer effect.
8. The large-scale ring type pulsating heat pipe as claimed in claim 1, wherein said inner pipe (1) has an outer diameter of 18mm, a wall thickness of 1mm and a length of 1300mm, said outer pipe (2) has an outer diameter of 22mm, a wall thickness of 0.8mm and a length of 1200mm, and said metal wires (3) have a diameter of 1mm for a total of 26.
9. The large-scale ring-type pulsating heat pipe as claimed in claim 1, wherein the inner pipe (1) and the metal wire (3) are made of metal with certain ductility, and the outer pipe (2) is made of metal or nonmetal.
10. The large-scale ring-type pulsating heat pipe as claimed in claim 9, wherein the material of said inner pipe (1) and said metal wire (3) is one of copper and titanium, and the material of said outer pipe (2) is one of stainless steel, aluminum, copper and glass.
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| CN201910837106.XA CN110595240A (en) | 2019-09-02 | 2019-09-02 | Large-scale ring type pulsating heat pipe |
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| CN201910837106.XA CN110595240A (en) | 2019-09-02 | 2019-09-02 | Large-scale ring type pulsating heat pipe |
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| CN101545735A (en) * | 2009-04-30 | 2009-09-30 | 上海交通大学 | Micro-channel flat plate heat pipe with metal wire structure |
| TWM411097U (en) * | 2011-04-20 | 2011-09-01 | Thermasol Technology Co Ltd | In the Ring-shaped loop with heat sink |
| CN202630760U (en) * | 2012-05-14 | 2012-12-26 | 南昌大学 | LED (Light Emitting Diode) heating panel type pulse heat pipe |
| CN105973044A (en) * | 2016-07-25 | 2016-09-28 | 上海交通大学 | Gravity assisted heat pipe device and preparation method |
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2019
- 2019-09-02 CN CN201910837106.XA patent/CN110595240A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101266112A (en) * | 2008-04-01 | 2008-09-17 | 哈尔滨工业大学 | SOG structure micro heat pipe and its manufacture method |
| CN101424491A (en) * | 2008-12-15 | 2009-05-06 | 华北电力大学 | Pulsating heat pipe with stable one-way circulation flow |
| CN101545735A (en) * | 2009-04-30 | 2009-09-30 | 上海交通大学 | Micro-channel flat plate heat pipe with metal wire structure |
| TWM411097U (en) * | 2011-04-20 | 2011-09-01 | Thermasol Technology Co Ltd | In the Ring-shaped loop with heat sink |
| CN202630760U (en) * | 2012-05-14 | 2012-12-26 | 南昌大学 | LED (Light Emitting Diode) heating panel type pulse heat pipe |
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Application publication date: 20191220 |