CN112050673A - Pulsating heat pipe with peer-to-peer flow dividing structure - Google Patents
Pulsating heat pipe with peer-to-peer flow dividing structure Download PDFInfo
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- CN112050673A CN112050673A CN202010931964.3A CN202010931964A CN112050673A CN 112050673 A CN112050673 A CN 112050673A CN 202010931964 A CN202010931964 A CN 202010931964A CN 112050673 A CN112050673 A CN 112050673A
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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
- F28D15/0266—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 separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
Abstract
The invention relates to a pulsating heat pipe with an equivalent shunting structure, belonging to the field of heat pipe enhanced heat transfer. The pulsating heat pipe comprises an evaporation section pipe and a condensation section pipe in the closed loop pulsating heat pipe, one or more equal shunt branch pipes are arranged between the evaporation section pipe and the condensation section pipe in the closed loop pulsating heat pipe, two ends of each equal shunt branch pipe are respectively communicated with the evaporation section pipe and the condensation section pipe through equal shunt three-way joints, and a vacuumizing liquid injection port is arranged on the condensation section pipe. Due to the existence of the equal-flow-dividing structure, the working medium can be promoted and maintained to form controllable one-way circulating flow in the pulsating heat pipe, the flow state staggering problems of local pulsation, stagnation, reverse backflow and the like in the pulsating heat pipe are inhibited, the starting time of the pulsating heat pipe is shortened, the heat exchange capability of the pulsating heat pipe is enhanced, and the equal-flow-dividing structure has wide practicability.
Description
Technical Field
The invention relates to a pulsating heat pipe with an equivalent shunting structure, belonging to the field of heat pipe enhanced heat transfer.
Background
With the demand of society on the enhanced heat transfer technology, various types of heat pipes are rapidly developed, and heat transfer elements for realizing heat transfer by means of phase change of working liquid in the heat pipes have the advantages of high heat conductivity, excellent isothermal property, wide environmental adaptability and the like, and comprise gravity heat pipes, rotary heat pipes, loop heat pipes, pulsating heat pipes and the like.
The pulsating heat pipe developed based on the loop thermosiphon utilizes the phase change to generate bubbles to drive the working medium to flow, and is increasingly concerned about due to the simple structure, no need of a liquid absorption core, unique heat dissipation performance and good space adaptability, so that the pulsating heat pipe is considered to be an enhanced heat transfer technology with great development prospect. But the internal mechanism is very complex, a multidisciplinary and multiparameter vapor-liquid two-phase flow system is involved, and both experimental and theoretical researches are still in a primary stage. The flow in the pulsating heat pipe belongs to vapor-liquid two-phase flow in a micro channel, the pressure, the temperature and the speed of working media in the pulsating heat pipe are pulsating in the operation process, and a plurality of thermal unbalance phenomena exist, so the operation characteristic of the pulsating heat pipe has great randomness and complexity. Viewed from the flowing direction, the flow of the working medium in the pulsating heat pipe can be divided into pulsating flow and circulating flow. The unidirectional circulation flow of the working medium in the pipe can improve the transmission of the working medium from the evaporation section to the condensation section, strengthen the heat transfer and improve the heat transfer performance of the pulsating heat pipe.
However, in actual operation, the internal working medium of the heat pipe oscillates randomly in the early stage of starting, and in most cases, the internal working medium oscillates in a reciprocating oscillating motion in the original position, so that the heat conduction of the traditional pulsating heat pipe is relatively slow in the early stage, and even if the heat pipe is heated to a certain degree, the internal working medium is not beneficial to establishing rapid unidirectional circulation, although a preliminary stable unidirectional circulation flow can be formed, the unidirectional flow is difficult to maintain, and usually, the unidirectional flow can be interlaced with flow states such as local pulsation, stagnation, reverse backflow and the like, and the operation phenomenon is very complex. Therefore, the operation stability and heat transfer controllability of the pulsating heat pipe need to be improved. Therefore, how to solve the problem becomes one of the important factors for improving the heat exchange effect of the pulsating heat pipe.
Although some scholars adopt a one-way valve (check valve) and the like to control the one-way circulation flow of the working medium in the heat pipe, because of the existence of moving parts, a series of uncertain factors such as abrasion and corrosion affect the effective operation of the heat pipe. In addition, although the unidirectional circulation flow of the working medium can be controlled by using the one-way valve, the resistance caused by the one-way valve still needs to be overcome when the working medium flows in the forward direction, so that the speed of gas-liquid pulsation is reduced, and the advantages of the pulsating heat pipe are also restrained, therefore, a special idea that the operation is reliable, no abrasion is caused, and the advantages of the pulsating heat pipe can be fully exerted is urgently needed.
In conclusion, for the pulsating heat pipe, how to efficiently and reliably realize stable one-way circulation flow has great significance for improving the heat exchange capability of the pulsating heat pipe.
Disclosure of Invention
The technical problem is as follows: the invention aims to overcome the defects in the prior art and provides the pulsating heat pipe with the equal-split flow structure, which has the advantages of simple structure, low cost, high reliability, good air tightness, small air resistance, no need of additional power, easiness in realizing miniaturization and capability of obviously shortening the starting time.
The technical scheme is as follows: the invention discloses a pulsating heat pipe with an equal-diversion structure, which comprises an evaporation section pipe and a condensation section pipe in one or more closed loop pulsating heat pipes, wherein one or more equal-diversion branch pipes are respectively arranged between the evaporation section pipe and the condensation section pipe in the one or more closed loop pulsating heat pipes, two ends of each equal-diversion branch pipe are respectively communicated with the evaporation section pipe and the condensation section pipe through an equal-diversion three-way joint, and a vacuumizing liquid injection port is arranged on the condensation section pipe.
The equal shunting three-way joint comprises a pant-type three-way joint, a T-type three-way joint, a claw-type three-way joint, a W-type three-way joint or a Y-type equal shunting three-way joint.
The middle part of the main flow port of the equal diversion three-way joint is provided with a partition plate which divides the main flow port into flow channels symmetrically communicated with 2 diversion ports.
The structure of the equivalent shunt branch pipe is S-shaped, C-shaped, U-shaped, annular, corrugated, arc-shaped or linear.
The equivalent diameter d of the inner pipe diameters of the evaporation section pipe, the condensation section pipe and the equivalent flow-dividing three-way joint needs to satisfy the following formula:
in the formula: g is the gravity acceleration, rho is the density of the working medium in the pulsating heat pipe, sigma represents the surface tension of the working medium, and subscripts l and v respectively represent the liquid phase and the gas phase of the working medium.
Has the advantages that: by adopting the technical scheme, the invention can promote and maintain the working medium to form controllable one-way circulating flow in the pulsating heat pipe by utilizing the equivalent shunting structure, inhibit the flow state interleaving problems of local pulsation, stagnation, reverse backflow and the like in the pulsating heat pipe, and have great application value for shortening the starting time of the pulsating heat pipe and enhancing the heat exchange capability of the pulsating heat pipe. The device can restrain the working medium from moving reversely, and has the advantages of flexibility, simple structure, low construction cost, high reliability, good air tightness, small air resistance, promotion of unidirectional circulation flow of the working medium, no need of external power, easy realization of miniaturization and obvious shortening of starting time. The running stability and the heat transfer controllability of the pulsating heat pipe are effectively improved, and the pulsating heat pipe has great application value for the pulsating heat pipe needing to promote unidirectional circulation flow. Compared with the prior art, the method has the following advantages:
1) the equivalent shunt structure can be arranged at any position of the heat pipe according to the requirement, the cross section of the branch can also take any shape, the branch pipe can be arranged in the heat pipe for multiple times and can also be twisted into any shape, and the basic principle of the equivalent shunt structure can be met only by a connection mode, so that the equivalent shunt structure is extremely flexible;
2) the equal-split structure can be formed by only one pipeline and 2 three-way joints, so that the structure is very simple, the construction cost is lower, but a plurality of branch pipes can be additionally arranged, the effect is enhanced, and the unidirectional circulating flow of the working medium is further promoted;
3) the equivalent flow dividing structure of the invention does not have moving parts like a one-way valve (check valve), so that the mechanical wear is avoided, and the reliability is higher;
4) the equivalent shunt structure can be integrally formed by using the same material as the heat pipe or by welding, gluing and the like, and can also be integrally formed, so that the air tightness is better;
5) the invention promotes the internal working medium to form controllable one-way circulation flow by adding the equal shunting structure in the pulsating heat pipe, and can obviously shorten the starting time of the pulsating heat pipe. Meanwhile, due to the existence of the pulsating heat pipe, when the problems of local pulsation, stagnation, reverse backflow and the like occur in the pulsating heat pipe, the problems can be eliminated quickly, and the previous unidirectional circulation flow is maintained.
6) The equivalent flow dividing structure of the invention is different from the existing partial heat pipe, a drive pump is additionally arranged to promote the unidirectional circulation flow of the working medium, and the structure is changed to realize the purpose, so that external power is not needed;
7) the pulsating heat pipe does not need to be additionally provided with moving equipment to promote the unidirectional circulation flow of the pulsating heat pipe, and only promotes the unidirectional circulation flow of the pulsating heat pipe through the change of the structure, so the miniaturization is very easy to realize.
Drawings
Fig. 1 is a schematic diagram of a conventional closed-loop pulsating heat pipe structure.
FIG. 2 is a schematic diagram of a pulsating heat pipe configuration of a pair of equal split flow configurations in accordance with an embodiment of the present invention.
FIG. 3 is a schematic diagram of a pulsating heat pipe configuration of a two-pair equal split flow configuration in accordance with an embodiment of the present invention.
FIG. 4 is a schematic diagram of a pulsating heat pipe structure of a three-pair flow splitting structure according to an embodiment of the present invention.
FIG. 5 is a schematic diagram of a pulsating heat pipe configuration of a four-peer-to-peer flow splitting configuration in accordance with an embodiment of the present invention.
FIG. 6 is a schematic diagram of a pulsating heat pipe structure of an example five-pair split-flow structure of the present invention.
FIG. 7(a) is a schematic view of a conventional tee structure.
FIG. 7(b) is a schematic diagram of the tee structure of the present invention.
In the figure: 1-evaporation section tube; 2-condensation section pipe; 3-equal shunting branch pipe; 4-an equal shunt three-way joint; 5-vacuumizing a liquid injection port; 6-a shunt port; 7-a separator; 8-main flow port.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
the invention relates to a pulsating heat pipe with an equal-split structure, which mainly comprises an evaporation section pipe 1 and a condensation section pipe 2 in one or more closed loop pulsating heat pipes, wherein one or more equal-split branch pipes 3 are respectively arranged between the evaporation section pipe 1 and the condensation section pipe 2 in the one or more closed loop pulsating heat pipes, two ends of each equal-split branch pipe 3 are respectively communicated with the evaporation section pipe 1 and the condensation section pipe 2 through an equal-split tee joint 4, and a vacuumizing liquid injection port 5 is arranged on the condensation section pipe 2.
The equal shunting three-way joint 4 comprises a pant-type three-way joint, a T-type three-way joint, a claw-type three-way joint, a W-type three-way joint or a Y-type equal shunting three-way joint.
The middle part of a main flow port 8 of the equal diversion three-way joint 4 is provided with a partition plate 7, and the main flow port 8 is divided into flow channels which are symmetrically communicated with 2 diversion ports 6.
The structure of the equal shunt branch pipe 3 is S-shaped, C-shaped, U-shaped, annular, corrugated, arc-shaped or linear.
The equivalent diameter d of the inner pipe diameters of the evaporation section pipe 1, the condensation section pipe 2 and the equivalent flow-dividing three-way joint 4 needs to satisfy the following formula:
in the formula: g is the gravity acceleration, rho is the density of the working medium in the pulsating heat pipe, sigma represents the surface tension of the working medium, and subscripts l and v respectively represent the liquid phase and the gas phase of the working medium.
As shown in figure 1, the existing closed loop pulsating heat pipe is provided, the working medium of the heat pipe is deionized water, the flow of the working medium in the pulsating heat pipe is divided into pulsating flow and circulating flow, and the working medium flows in the pipe in a one-way circulating manner, so that the working medium transmission from an evaporation section to a condensation section can be improved, the heat transfer is enhanced, and the heat transfer performance of the pulsating heat pipe is improved. However, the acting forces generated by the gasification of the working medium in the pipeline when the working medium passes through the heating evaporation section pipe 1 are opposite in direction, the acting forces generated by the liquefaction of the working medium in the pipeline when the working medium passes through the cooling evaporation section pipe 2 are opposite, and a gas plug and a liquid plug are formed in the closed loop pulsating heat pipeline, so that the pressure, the temperature and the speed of the internal working medium in the operation process of gas-liquid two-phase flow are all pulsating, a plurality of thermal unbalance phenomena exist, the operation characteristic has great randomness and complexity, and the unidirectional circulation flow of the working medium in the pipeline cannot be ensured.
The material of the equal diversion tee joint 4 is red copper, and the inner pipe diameters of the inlets of 1 main flow port 8 and 2 diversion ports 6 are both 2 mm. Fig. 7(a) shows a conventional symmetrical Y-shaped equivalent shunt three-way joint 4, and fig. 7(b) shows a partition 7 additionally installed inside the conventional symmetrical Y-shaped equivalent shunt three-way joint 4, so as to divide the conventional symmetrical equivalent shunt three-way joint into 2 symmetrical flow channels from a main flow inlet. The baffle 7 is positioned on a vertical plane of a plane with the centroids of the main flow port 8 and the centroids of the 2 branch flow ports 6, the vertical plane passes through the centroid of the main flow port 8, and the thickness of the baffle is 0.2 mm. The equal-diversion tee joint 4 and the partition 7 are integrally formed. Based on the structure of the equal-flow-dividing three-way joint 4, the working medium coming from the main flow port 8 can be divided into approximately equal working mediums which respectively flow into the 2 flow-dividing ports 6, and the working mediums from the 2 flow-dividing ports 6 can not interfere with each other and flow out in approximately equal flow directions from the main flow port 8. The material of the equal-level shunt branch pipe 3 is red copper, the inner pipe diameter is 2mm, and the equal-level shunt branch pipe 3 and the equal-level shunt three-way joint 4 are formed by welding. The two ends of the equal diversion branch pipe 3 are respectively connected with 1 of 2 diversion ports 6 of 2 equal diversion tee joints 4. Therefore, based on the equal-flow-dividing three-way joint 4, when the working medium flows in from the main flow port 8 of one equal-flow-dividing three-way joint 4 and the main flow port 8 of the other equal-flow-dividing three-way joint 4 at the same time, two nearly equal parts of the two working mediums from the main flow port 8 can be respectively divided and respectively flow into the flow-dividing port 6 and the equal-flow-dividing branch pipe 3, and the two working mediums flowing into the equal-flow-dividing branch pipe 3 can impact each other.
Example 2 is basically the same as example 1, and the same points are omitted, as shown in fig. 3. The difference, the structure of the main body of an equal diversion branch pipe 3 arranged between the evaporation section pipe 1 and the condensation section pipe 2 is in a straight line shape, the two ends are bent pipes, and the bent pipes at the two ends are respectively communicated with the evaporation section pipe 1 and the condensation section pipe 2 through an equal diversion three-way joint 4.
Example 3 is basically the same as example 1, and the same points are omitted as shown in fig. 4. The difference, the structure of the main body of a peer-to-peer shunt branch pipe 3 arranged between the evaporation section pipe 1 and the condensation section pipe 2 is in a straight line shape, the two ends are in a C shape, and the bent pipes at the two ends are respectively communicated with the evaporation section pipe 1 and the condensation section pipe 2 through the peer-to-peer shunt three-way joint 4.
Example 4 is basically the same as example 1, and the same points are omitted, as shown in fig. 5. The difference, three S-shaped equal-distribution branch pipes 3 are arranged between the evaporation section pipe 1 and the condensation section pipe 2, the three equal-distribution branch pipes 3 are arranged between the evaporation section pipe 1 and the condensation section pipe 2 at intervals, and two ends of the three equal-distribution branch pipes 3 are respectively communicated with the evaporation section pipe 1 and the condensation section pipe 2 through equal-distribution three-way joints 4.
Example 5, as shown in fig. 6, is basically the same as example 4 except that: the closed loop pulsating heat pipeline is composed of a plurality of groups of evaporation section pipes 1 and condensation section pipes 2, 5 groups of the evaporation section pipes 1 and the condensation section pipes 2 are shown in the figure, the evaporation section pipes 1 and the condensation section pipes 2 in the 5 groups of the evaporation section pipes are all in elbow shapes, three S-shaped equal-flow-distribution branch pipes 3 are arranged between the evaporation section pipes 1 and the condensation section pipes 2 in each group of the elbow shapes, and two ends of the three equal-flow-distribution branch pipes 3 are respectively communicated with the evaporation section pipes 1 and the condensation section pipes 2 through equal-flow-distribution tee joints 4.
5 groups of evaporation section pipes 1 and 5 groups of condensation section pipes 2: two ends of the 5 groups of evaporation section pipes 1 are respectively connected with a main flow port 8 and a branch flow port 6 of the same equivalent flow-dividing three-way joint 4 in the same group, and the 5 groups of condensation section pipes 2 are sequentially connected with the main flow port 8 and the branch flow port 6 of each group of equivalent flow-dividing three-way joints 4 to form a closed loop.
The working principle and process are described by taking fig. 1 and fig. 2 as an example:
when the left side of a traditional single-loop pulsating heat pipe is heated as shown in figure 1, part of liquid-phase working medium of an evaporation section pipe 1 in the single-loop pulsating heat pipe is heated to be subjected to phase change and changed into bubbles, and the bubbles are partially collapsed, but most of the bubbles can further grow, expand and merge to form a large bubble. At the moment, the bubbles (air plugs) can push the liquid plugs at the two sides, the pushed liquid plugs can further push the air plugs in contact with the bubbles, and finally, part of the air plugs are pushed to the condensation section pipe 2 to be converted into liquid state again, so that the circulation is repeated, the gas and the liquid are alternately converted, and the pulsating heat pipe realizes the heat transfer. However, due to the disorder of gas-liquid plug distribution inside the pulsating heat pipe and the symmetry of force action when the working medium liquid is converted into gas state and the gas state is converted into liquid state, as shown by the arrow with a dotted line in fig. 1, the working medium in the pulsating heat pipe is disordered at the initial stage of heating, and only when the working medium is heated for a certain time and degree, the working medium can flow in a forward direction or a reverse direction. Therefore, for the traditional pulsating heat pipe, the flow direction of the working medium during normal work cannot be judged without the help of other tools, and the movement disorder of the working medium during phase change cannot be eliminated in time, so that the unidirectional circulation flow of the working medium cannot be realized in time, and the heat exchange efficiency of the pulsating heat pipe is reduced.
According to the pulsating heat pipe disclosed by the invention, as shown in figure 2, the left side of the pulsating heat pipe is heated, and the heating has a larger influence on the starting performance of the pulsating heat pipe than the cooling in a normal condition, so that when the pulsating heat pipe disclosed by the invention is cooled and heated, a working medium in the evaporation section pipe 1 flows more intensely, part of the working medium is subjected to phase change gasification, and a gas-liquid plug is pushed to flow towards two equal-flow-dividing tee joints 4 at the connecting positions of the evaporation section pipe 1 and the equal-flow-dividing branch pipes 3 respectively. The lower equivalent shunt three-way joint 4 in the figure is connected with the evaporation section pipe 1 through the main flow port 8, according to the structure of the equivalent shunt three-way joint 4, a gas-liquid plug rushing to the equivalent shunt three-way joint can be divided into two working mediums with approximately equal momentum to enter the equivalent shunt branch pipe 3 and the pulsating heat pipe condensation section pipe 2 respectively, the upper equivalent shunt three-way joint 4 in the figure is connected with the evaporation section pipe 1 through the shunt port 6, so that only a small part of the working medium with smaller relative momentum enters the equivalent shunt branch pipe 3, and the majority of the working medium with larger relative momentum enters the pulsating heat pipe condensation section pipe 2. At this time, in the equal diversion branch pipe 3, the momentum of the working medium from the lower equal diversion three-way joint 4 is larger than the momentum of the working medium from the upper equal diversion three-way joint 4. In the pulsating heat pipe condenser section pipe 2 of the invention, the momentum of the working medium from the upper side equal-flow-dividing three-way joint 4 is larger than the momentum of the working medium from the lower side equal-flow-dividing three-way joint 4, so that the flowing condition shown in figure 2 is formed. Next, in the equal-diversion branch pipe 3, the working medium from the lower-side equal-diversion three-way joint 4 pushes the working medium from the upper-side equal-diversion three-way joint 4, and finally the working medium from the lower-side equal-diversion three-way joint 4 completely occupies the equal-diversion branch pipe 3 and flows out from the main flow port 8 of the upper-side equal-diversion three-way joint 4. In the condensing section pipe 2, the working medium from the upper side equal-diversion three-way joint 4 pushes the working medium from the lower side equal-diversion three-way joint 4, and finally the working medium from the upper side equal-diversion three-way joint 4 can completely occupy the condensing section pipe 2. At this time, the pulsating heat pipe begins to exhibit a partial unidirectional circulation flow phenomenon. At this time, at the upper side equal diversion tee joint 4, the flow directions of the working mediums from the evaporation section pipe 1 and the equal diversion branch pipe 3 are consistent, so momentum parts of the working mediums are overlapped and flow towards the lower side equal diversion tee joint 4 along the condensation section pipe 2, at the lower side equal diversion tee joint 4, the flow direction of the working medium from the condensation section pipe 2 is opposite to the flow direction of the working medium from the evaporation section pipe 1, and the working medium from the evaporation section pipe 1 can be divided into two approximately equal parts. Therefore, at the lower side equal-flow-dividing three-way joint 4, the flowing direction of the working medium from the condensing section pipe 2 is opposite to that of the working medium from the evaporating section pipe 1, and the momentum of the working medium from the condensing section pipe 2 is far greater than that of the working medium from the evaporating section pipe 1, so that the working medium from the condensing section pipe 2 can push the working medium from the evaporating section pipe 1 to flow back, and the unidirectional flow of the working medium in the pulsating heat pipe is thoroughly formed.
Claims (5)
1. A pulsating heat pipe with an equal flow-dividing structure comprises an evaporation section pipe (1) and a condensation section pipe (2) in one or more closed-loop pulsating heat pipes, and is characterized in that: one or more equal shunt branch pipes (3) are respectively arranged between an evaporation section pipe (1) and a condensation section pipe (2) in the one or more closed loop pulsating heat pipes, two ends of each equal shunt branch pipe (3) are respectively communicated with the evaporation section pipe (1) and the condensation section pipe (2) through an equal shunt three-way joint (4), and a vacuumizing liquid injection port (5) is arranged on the condensation section pipe (2).
2. A pulsating heat pipe having an equivalent flow splitting structure as defined in claim 1, wherein: the equal shunting three-way joint (4) comprises a pants-type three-way joint, a T-type three-way joint, a claw-type three-way joint, a W-type three-way joint or a Y-type equal shunting three-way joint.
3. A pulsating heat pipe having an equivalent flow splitting structure as defined in claim 1 or 2, wherein: the middle part of a main flow port (8) of the equal-flow-dividing three-way joint (4) is provided with a partition plate (7) which divides the main flow port (8) into flow channels symmetrically communicated with 2 flow-dividing ports (6).
4. A pulsating heat pipe having an equivalent flow splitting structure as defined in claim 1 or 4, wherein: the structure of the equal shunt branch pipe (3) is S-shaped, C-shaped, U-shaped, annular, corrugated, arc-shaped or linear.
5. A pulsating heat pipe having an equivalent flow splitting structure as defined in claim 1, wherein: the equivalent diameter d of the inner pipe diameters of the evaporation section pipe (1), the condensation section pipe (2) and the equivalent flow-dividing three-way joint (4) needs to satisfy the following formula:
in the formula: g is the gravity acceleration, rho is the density of the working medium in the pulsating heat pipe, sigma represents the surface tension of the working medium, and subscripts l and v respectively represent the liquid phase and the gas phase of the working medium.
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| CN202010931964.3A CN112050673B (en) | 2020-09-08 | 2020-09-08 | Pulsating heat pipe with peer-to-peer flow dividing structure |
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| CN202010931964.3A CN112050673B (en) | 2020-09-08 | 2020-09-08 | Pulsating heat pipe with peer-to-peer flow dividing structure |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332881A (en) * | 1994-06-09 | 1995-12-22 | Akutoronikusu Kk | Loop type zigzag capillary heat pipe |
| CN1393678A (en) * | 2001-06-22 | 2003-01-29 | 李嘉豪 | Heat exchange assembly for looped heat pipe |
| US20040037045A1 (en) * | 2002-08-14 | 2004-02-26 | Phillips Alfred L. | Thermal bus for electronics systems |
| CN105571366A (en) * | 2015-12-25 | 2016-05-11 | 南昌大学 | Pulsating heat pipe with tilt-angle communicating pipe structure |
| CN108267037A (en) * | 2018-03-08 | 2018-07-10 | 广州华钻电子科技有限公司 | A kind of loop soaking plate of multiple-limb condensation heat pipe |
| CN110081750A (en) * | 2019-05-17 | 2019-08-02 | 中国科学技术大学 | A kind of pulsating heat pipe with nozzle arrangements |
-
2020
- 2020-09-08 CN CN202010931964.3A patent/CN112050673B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07332881A (en) * | 1994-06-09 | 1995-12-22 | Akutoronikusu Kk | Loop type zigzag capillary heat pipe |
| CN1393678A (en) * | 2001-06-22 | 2003-01-29 | 李嘉豪 | Heat exchange assembly for looped heat pipe |
| US20040037045A1 (en) * | 2002-08-14 | 2004-02-26 | Phillips Alfred L. | Thermal bus for electronics systems |
| CN105571366A (en) * | 2015-12-25 | 2016-05-11 | 南昌大学 | Pulsating heat pipe with tilt-angle communicating pipe structure |
| CN108267037A (en) * | 2018-03-08 | 2018-07-10 | 广州华钻电子科技有限公司 | A kind of loop soaking plate of multiple-limb condensation heat pipe |
| CN110081750A (en) * | 2019-05-17 | 2019-08-02 | 中国科学技术大学 | A kind of pulsating heat pipe with nozzle arrangements |
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| CN112050673B (en) | 2021-09-24 |
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