CN109631630B - Heat pipe with variable vertical pipe diameter - Google Patents
Heat pipe with variable vertical pipe diameter Download PDFInfo
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- CN109631630B CN109631630B CN201810195987.5A CN201810195987A CN109631630B CN 109631630 B CN109631630 B CN 109631630B CN 201810195987 A CN201810195987 A CN 201810195987A CN 109631630 B CN109631630 B CN 109631630B
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- 238000001704 evaporation Methods 0.000 claims abstract description 25
- 230000008020 evaporation Effects 0.000 claims abstract description 25
- 239000003546 flue gas Substances 0.000 claims abstract description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000009833 condensation Methods 0.000 claims abstract description 9
- 230000005494 condensation Effects 0.000 claims abstract description 9
- 238000009826 distribution Methods 0.000 claims description 16
- 239000000779 smoke Substances 0.000 claims description 10
- 238000000746 purification Methods 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 24
- 239000002918 waste heat Substances 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 description 16
- 238000010438 heat treatment Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 241000826860 Trapezium Species 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
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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
- F28D15/0233—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 the conduits having a particular shape, e.g. non-circular cross-section, annular
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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
- F28D15/025—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 having non-capillary condensate return means
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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
- F28F2210/00—Heat exchange conduits
- F28F2210/10—Particular layout, e.g. for uniform temperature distribution
Abstract
The invention provides a heat pipe with regularly changed pipe diameters of vertical pipes, which comprises a vertical part, a horizontal part and vertical pipes, wherein the bottom end of the vertical part is communicated with the horizontal part, the horizontal part extends from the bottom end of the vertical part to the direction far away from the vertical part, the lower part of the horizontal part is communicated with a plurality of vertical pipes, the vertical pipes are evaporation ends of the heat pipe, the vertical parts are condensation ends of the heat pipe, and the vertical pipes and the horizontal parts are arranged in a flue gas channel; the vertical pipe be a plurality of, along the flow direction of flue gas, the pipe diameter of vertical pipe is littleer and smaller. The invention provides a novel heat pipe structure, and the structure of the evaporation end of the heat pipe is improved, so that the heat pipe structure can further meet the requirement of heat absorption according to different pipe diameters of vertical pipes at different positions, and the waste heat absorption capacity is improved.
Description
Technical Field
The invention relates to a heat pipe technology, in particular to a heat pipe with a novel structure.
Background
The heat pipe technology is a heat transfer element called a heat pipe invented by George Grover (George Grover) of national laboratory of Los Alamos (Los Alamos) in 1963, fully utilizes the heat conduction principle and the rapid heat transfer property of a phase change medium, quickly transfers the heat of a heating object to the outside of a heat source through the heat pipe, and the heat conduction capability of the heat transfer element exceeds the heat conduction capability of any known metal.
The heat pipe technology is widely applied to the industries of aerospace, military industry and the like, and since the heat pipe technology is introduced into the radiator manufacturing industry, the design idea of the traditional radiator is changed for people, the single heat radiation mode that a high-air-volume motor is used for obtaining a better heat radiation effect is avoided, the heat pipe technology is adopted for enabling the radiator to obtain a satisfactory heat exchange effect, and a new place in the heat radiation industry is opened up. At present, heat pipes are widely applied to various heat exchange devices, including the field of electric power, such as waste heat utilization of power plants.
In the prior art, the shape of the heat pipe influences the heat absorption area of the evaporation end, so that the heat absorption range of the evaporation end is smaller, and a plurality of heat pipes are sometimes required to be arranged in a heat source to meet the heat absorption requirement; when multiple evaporation ends exist, the evaporation ends can absorb heat unevenly because the positions of the evaporation ends at the heat source are different.
Aiming at the problems, the invention improves on the basis of the prior invention, provides a new heat pipe structure, fully utilizes a heat source, reduces energy consumption and improves smoke exhaust effect.
Disclosure of Invention
In order to solve the problems, the invention is improved on the basis of the previous invention, and provides a new heat pipe structure to realize the full utilization of waste heat.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a heat pipe with variable distribution density of vertical pipes comprises a vertical part, a horizontal part and vertical pipes, wherein the bottom end of the vertical part is communicated with the horizontal part, the horizontal part extends from the bottom end of the vertical part to the direction far away from the vertical part, the lower part of the horizontal part is communicated with a plurality of vertical pipes, the vertical pipes are evaporation ends of the heat pipe, the vertical parts are condensation ends of the heat pipe, and the vertical pipes and the horizontal parts are arranged in a smoke channel; the flue gas purification device is characterized in that the number of the vertical pipes is multiple, and the pipe diameters of the vertical pipes are smaller and smaller along the flow direction of flue gas.
Preferably, the diameter of the vertical pipe is gradually increased along the flowing direction of the flue gas in a smaller and smaller range.
Preferably, the vertical portion is provided in the air passage.
Preferably, the heat pipe is arranged in a round pipe, the round pipe is divided into an upper part and a lower part, the upper part is an air channel, and the lower part is a smoke channel.
Preferably, the length of the horizontal part along the flowing direction of the flue gas is L, and the pipe diameter of the vertical pipe at the tail part of the heat pipe along the flowing direction of the flue gas is DTailThen, the rule of the diameter D of the vertical pipe at the position l away from the tail of the heat pipe is as follows: d2＝b*（DTail）2+c*（DTail）2*（l/L）aWherein a, b and c are coefficients, and the following requirements are met:
1.085<a<1.125,0.985<b+c<1.015，0.485<b<0.645。
preferably, a gradually decreases as L/L increases.
Preferably, 1.093< a <1.106, b + c =1, 0.548< b < 0.573. Preferably, the vertical portion is provided in the air passage.
Preferably, the heat pipe is arranged in a round pipe, the round pipe is divided into an upper part and a lower part, the upper part is an air channel, and the lower part is a smoke channel.
Preferably, the horizontal part is of a flat tube structure, the vertical tube is of a circular tube structure, and the horizontal part is of a square structure; the vertical tubes are arranged in a plurality of rows, wherein two adjacent rows are arranged in a staggered manner; the circle centers of the vertical pipes and the circle centers of the two adjacent vertical pipes in the adjacent row form an isosceles triangle, and the circle centers of the vertical pipes are located at the points of the vertex angles of the isosceles triangle.
As preferred, the external diameter of vertical pipe is d, and the distance between the adjacent vertical pipe centre of a circle of same row is L, and the centre of a circle of vertical pipe and two vertical pipe centre of a circle that are close to of adjacent row constitute isosceles triangle's apex angle and be A, then satisfy following requirement:
Sin（A）=a*( d/L)2-b (d/L) + c, wherein a, b, c are parameters, satisfying the following requirements:
1.03<a<1.09,1.73<b<1.74；0.895<c<0.906,0.1<d/L<0.7。
preferably, a =1.07, b =1.735, and c = 0.901.
Preferably, 0.3< d/L < 0.5.
Preferably, a is larger, b is smaller, and c is larger as d/L is smaller.
Compared with the prior art, the invention has the following advantages:
1) the invention provides a novel heat pipe structure, and the structure of the evaporation end of the heat pipe is improved, so that the heat pipe structure can further meet the requirement of heat absorption according to different pipe diameters of vertical pipes at different positions, and the waste heat absorption capacity is improved.
2) The invention improves the structure of the evaporation end of the heat pipe in waste heat utilization, extends the evaporation end of the heat pipe to a farther direction, and increases the heat absorption area of the evaporation end of the heat pipe under the condition of not changing the volume of the condensation end of the heat pipe, thereby expanding the heat absorption range of the heat pipe and absorbing the heat at the farthest end of a heat source. Compared with the evaporation end and the condensation end of the heat pipe in the prior art, the size of the heat pipe is kept consistent. Meanwhile, the volume and the occupied area of the heat exchanger are reduced, so that the structure is compact.
3) A large amount of numerical simulation and experimental researches are carried out, the optimal structure of the distribution structure of the heat pipes in waste heat utilization is carried out, the optimal relational expression of the heat pipe distribution is obtained through the researches, the distribution of the heat pipes is further improved, the optimal heat absorption is achieved, and the cost is reduced.
4) According to the invention, the communicating pipe is arranged at the adjacent evaporation ends, so that under the condition that the pressures of the vertical pipes are different due to different heating, the fluid in the evaporation end with large pressure can quickly flow to the evaporation end with small pressure, thereby keeping the overall pressure balance and avoiding local overheating or overcooling.
Drawings
FIG. 1 is a schematic view of a first embodiment of a heat pipe structure of the present invention disposed in a flue.
Fig. 2 is a schematic view of a second embodiment of the heat pipe structure of the present invention arranged in a flue.
FIG. 3 is a schematic view of a heat pipe structure according to the present invention.
Fig. 4 is a schematic view of fig. 3 as viewed from the bottom.
Fig. 5 is a schematic view of a partial structure of a heat pipe provided with a communication pipe according to the present invention.
Fig. 6 is a schematic view of a third embodiment of the heat pipe structure in the flue of the present invention.
Fig. 7 is an enlarged fragmentary illustration of fig. 4.
In the figure: 10-heat pipe, 101-vertical part, 102-horizontal part, 103-vertical pipe, 104-round pipe, 105-air channel, 106-flue gas pipeline, 107-communicating pipe.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In this document, "/" denotes division and "×", "denotes multiplication, referring to formulas, if not specifically stated.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
As shown in fig. 1 to 6, a heat pipe 10 disposed in a flue and utilizing a flue residual heat device includes a vertical portion 101, a horizontal portion 102, and a vertical pipe 103, wherein a bottom end of the vertical portion 101 communicates with the horizontal portion 102, the horizontal portion 102 extends from the bottom end of the vertical portion 101 to a direction away from the vertical portion 101, the horizontal portion 102 communicates with a plurality of vertical pipes 103, wherein the vertical pipe 103 is an evaporation end of the heat pipe, and the vertical portion 101 is a condensation end of the heat pipe. The vertical part is at least partly arranged in the air passage, the vertical pipe and the horizontal part are arranged in the flue gas duct 106
In the operation of the heat pipe, the heat is absorbed from the smoke through the vertical pipe 103, then the fluid in the vertical pipe 103 is evaporated and enters the vertical part through the horizontal part, then the heat is released to the air in the vertical part, and the fluid is condensed and enters the vertical pipe 103 again under the action of gravity.
The invention improves the structure of the heat pipe through arranging the evaporation end of the heat pipe, extends the evaporation end of the heat pipe to a farther direction, and increases the heat absorption area of the evaporation end of the heat pipe under the condition of not changing the volume of the condensation end of the heat pipe, thereby expanding the heat absorption range of the heat pipe and absorbing the heat at the farthest end of a heat source. Compared with the heat pipe in the prior art, the heat exchange efficiency can be improved by more than 45 percent by keeping the evaporation end and the condensation end of the heat pipe in consistent sizes. Meanwhile, the volume and the occupied area of the condensation end are reduced, so that the structure is compact.
Preferably, the number of the vertical pipes is multiple, and the pipe diameter of the vertical pipe is smaller along the flowing direction of the flue gas. In numerical simulation and experiments, the heating capacity of the vertical pipe is smaller and smaller along the flowing direction of the flue gas, and the temperatures of the vertical pipes at different positions are different, so that local heating is not uniform. Because the temperature of the flue gas is continuously reduced along with the continuous heat exchange of the flue gas, the heat exchange capacity is also reduced, and therefore, the heat absorption capacity of the vertical pipe is continuously reduced along the flow direction of the flue gas by arranging the vertical pipes at different positions of the flue gas channel, so that the temperature of the whole heat pipe is basically the same, the whole heat exchange efficiency is improved, materials are saved, the local damage caused by uneven temperature is avoided, and the service life of the heat pipe is prolonged.
Preferably, the diameter of the vertical pipe is gradually increased along the flowing direction of the flue gas in a smaller and smaller range. As for the change of the pipe diameter of the vertical pipe, the invention carries out a large number of numerical simulations and experiments, thereby obtaining the change rule of the pipe diameter of the vertical pipe. Through the change rule, materials can be saved, and meanwhile, the heat exchange efficiency can be improved by about 8%.
Preferably, the distribution density and length of all the vertical tubes 103 are the same.
Along the smoke flowing direction, the length of the horizontal part is L, and along the smoke flowing direction, the pipe diameter of the vertical pipe at the tail part of the heat pipe is DTailThen, the rule of the diameter D of the vertical pipe at the position l away from the tail of the heat pipe is as follows:
D2＝b*（Dtail）2+c*（DTail）2*（l/L）aWherein a, b and c are coefficients, and the following requirements are met:
1.085<a<1.125,0.985<b+c<1.015，0.485<b<0.645。
preferably, a gradually decreases as L/L increases.
Preferably, 1.093< a <1.106, b + c =1, 0.548< b < 0.573;
the optimized formula is obtained through a large number of experiments and numerical simulation, the distribution density of the vertical pipes of the heat pipe can reach optimized distribution, the heat distribution can be uniform on the whole, the heat exchange effect is good, and meanwhile materials can be saved.
Preferably, the vertical portion 101 is provided in the air passage. By heating the air channel, the heated air is directly used for combustion.
Preferably, as shown in fig. 1, the heat pipe 10 is disposed in a round pipe 104, which is divided into an upper part and a lower part, wherein the upper part is an air passage 105, and the lower part is a flue gas passage 106. Through the arrangement, the heat pipe and the heat exchange fluid can be completely arranged in the circular pipe, so that the external space can be fully utilized, and the purpose of compact structure is achieved.
Preferably, as shown in FIG. 1, the cross-sectional area of the upper portion is 50 to 80%, more preferably 60 to 70%, of the cross-sectional area of the lower portion. Through the area distribution, the heat absorption and the heat dissipation of the heat pipe can achieve the purpose of uniform coordination.
Preferably, as shown in fig. 1, two heat pipes are arranged in the circular pipe, and the vertical portions 101 of the heat pipes 10 are arranged closely.
Preferably, the distance between the opposite faces of the vertical portion 101 is 20 to 40%, preferably 30%, of the width of the vertical portion of the heat pipe (the distance of the vertical portion of the heat pipe in the left-right direction in fig. 3 is the width).
FIG. 2 illustrates an embodiment of a second distribution of heat pipes in a stack. As shown in fig. 2, the air channel has a trapezoidal structure. The upper bottom of the trapezoid structure is positioned at the upper part of the vertical part 101, and the lower bottom is the upper wall surface of the smoke channel. The heat exchange efficiency can be further improved by arranging the novel trapezoidal structure shown in fig. 2. Because the vertical part of heat pipe upwards, the continuous participation heat transfer of vertical part of heat pipe, therefore vertical part lower part temperature is the highest, through setting up trapezium structure, can make lower part air flow many, upper portion air flow is few, reaches the purpose of even heat transfer. And through setting up trapezium structure, can make external structure compact, outside space can realize make full use of. For example, the position of the waist of the ladder structure may be provided with other components, such as pipes.
Preferably, the upper base of the trapezoid structure is 40-60%, more preferably 50% of the lower base.
Preferably, the trapezoid is an isosceles trapezoid.
Further preferably, the angle formed by the lower base of said trapezoid and the waist is 29-67 °, preferably 40-50 °.
Through foretell configuration optimization, can realize the even and the improvement of heat exchange efficiency of heat transfer in the at utmost.
FIG. 6 illustrates an embodiment of a third distribution of heat pipes in the stack. As shown in fig. 6, the air channel has a rectangular structure. The upper bottom of the rectangular structure is located at the upper part of the vertical part 101, and the lower bottom is a part of the upper wall surface of the smoke channel. By arranging the novel rectangular structure shown in fig. 6, the external structure can be further made compact, and the external space can be fully utilized. For example, other components, such as pipes, may be provided at locations outside the rectangular structure.
Preferably, the long side of the rectangular structure is parallel to the vertical portion.
Preferably, the long side of the rectangular structure is 1.5 to 3 times, preferably 2 times, the short side.
Preferably, the short side of the rectangular structure is 0.6-0.8 times, preferably 0.72 times the radius of the flue gas channel 106. Through foretell configuration optimization, can realize the improvement of heat exchange efficiency to the at utmost.
In addition, the plurality of vertical pipes 103 are arranged as the evaporation ends of the heat pipes, so that each vertical pipe 103 is used as an independent heat absorption pipe to absorb heat, and the heat absorption area of the evaporation end of the whole heat pipe is increased.
Preferably, the horizontal portion 102 has a flat tube structure, and the vertical tube 103 has a circular tube structure. By providing the horizontal portion as a flat tube structure, the distribution of the vertical tubes 103 can be increased, further improving the heat absorption.
It is further preferred that the horizontal portion 102 has a square configuration.
Preferably, as shown in fig. 4, the vertical tubes 103 are arranged in a plurality of rows, wherein two adjacent rows are arranged in a staggered manner. By the staggered arrangement, the heat absorption capacity of the heat pipe can be further improved.
Preferably, the vertical tubes 103 are located on an extension of a center line of circle center connecting line segments of adjacent vertical tubes 103 of adjacent rows. Namely, the circle centers of the vertical tubes 103 and the circle centers of two adjacent vertical tubes 103 in the adjacent row form an isosceles triangle, and the circle centers of the vertical tubes are located at the points of the vertex angles of the isosceles triangle.
Preferably, as shown in fig. 5, a communication pipe 107 is provided between at least two adjacent vertical pipes 103. In the research, it is found that in the process of absorbing heat in the vertical section, different absorption heat amounts of the heat absorbing pipes at different positions can occur, so that the pressure or temperature between the vertical pipes 103 is different, and thus, a part of the vertical pipes 103 are heated too high, which results in shortened service life, and once a problem occurs in one vertical pipe 103, the problem that the whole heat pipe cannot be used may occur. According to the invention, through a great deal of research, the communicating pipe 107 is arranged between the adjacent vertical pipes, so that under the condition that the vertical pipes are heated differently to cause different pressures, the fluid in the vertical pipe 103 with high pressure can rapidly flow to the vertical pipe 103 with low pressure, thereby keeping the overall pressure balance and avoiding local overheating or overcooling.
Preferably, a plurality of communication pipes 107 are provided between the adjacent vertical pipes 103 from the lower portion of the vertical pipe 103 to the upper portion of the vertical pipe 103. Through setting up a plurality of communicating pipes, can make the continuous balanced pressure of fluid in the heat absorption evaporation process, guarantee the pressure balance in the whole vertical intraductal.
Preferably, the distance between the adjacent communication pipes 107 is continuously decreased from the lower portion of the vertical pipe 103 to the upper portion of the vertical pipe 103. The purpose is to arrange more communicating pipes, because the fluid is continuously heated along with the upward flow of the fluid, and the heating in different heat collecting pipes is more and more uneven along with the continuous heating of the fluid, so that the pressure balance can be achieved as soon as possible in the flowing process of the fluid through the arrangement.
Preferably, the distance between the adjacent communication pipes is decreased more and more from the lower portion of the vertical pipe 103 to the upper portion of the vertical pipe 103. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.
Preferably, the diameter of communication pipe 107 is increased from the lower portion of vertical pipe 103 to the upper portion of vertical pipe 103. The purpose is to ensure a larger communication area, because the fluid is continuously heated along with the upward flow of the fluid, and the heating in different heat collecting pipes is more and more uneven along with the continuous heating of the fluid, so that the pressure balance can be ensured to be achieved as soon as possible in the flowing process of the fluid through the arrangement.
Preferably, the diameter of communication pipe 107 is increased more and more from the lower portion of vertical pipe 103 to the upper portion of vertical pipe 103. Experiments show that the arrangement can ensure that the pressure balance is achieved more optimally and more quickly in the fluid flowing process. This is also the best way of communicating by extensively studying the law of change of the pressure distribution.
Through numerical simulation and experiment, it is found that the distance between the vertical pipes 103, including the distance between the same row and the distance between the adjacent rows can not be too small, the undersize can lead to the heat pipe to distribute too much, lead to the heat absorption capacity of every heat pipe not enough, too big can lead to the heat pipe to distribute too little, lead to the heat pipe overheated, consequently this application through a large amount of numerical simulation and experiments, summarize the distribution of the optimization that the vertical pipe 103 of heat pipe distributes, make the heat pipe neither can the heat absorption capacity not enough, can not the heat absorption capacity too big again.
As shown in fig. 7, the outer diameter of the vertical pipe 103 is d, the distance between the centers of the adjacent vertical pipes 103 in the same row is L, the center of the vertical pipe 103 and the centers of two adjacent vertical pipes 103 in the adjacent row form an isosceles triangle, the vertex angle is a, and the following requirements are met:
Sin（A）=a*( d/L)2-b (d/L) + c, wherein a, b, c are parameters, satisfying the following requirements:
1.03<a<1.09,1.73<b<1.74；0.895<c<0.906,0.1<d/L<0.7。
preferably, a =1.07, b =1.735, and c = 0.901.
Preferably, a is larger, b is smaller, and c is larger as d/L is smaller.
Preferably, 15 ° < a <80 °.
Further preferably, 20 ° < a <40 °.
Further preferably, 0.3< d/L < 0.5.
The empirical formula is obtained through a large number of numerical simulations and experiments, the optimized heat pipe structure can be realized through the structure obtained through the relational expression, and the error is basically within 3% through experimental verification.
The heat absorption capacity of the heat pipe is 900-1100W, and more preferably 1000W;
the temperature of the flue gas is 90-110 ℃, and more preferably 100 ℃.
The horizontal portion of the heat pipe shown in fig. 3 is preferably square with a side length of 400 mm and 600 mm, and more preferably 500 mm.
The outer diameter d of the vertical tube 103 is 9 to 12 mm, and more preferably 11 mm.
Preferably, as shown in fig. 4, the system comprises two heat pipes, and the horizontal parts 102 of the two heat pipes extend towards opposite directions respectively.
Although the present invention has been described with reference to the preferred embodiments, it is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A heat pipe with variable distribution density of vertical pipes comprises a vertical part, a horizontal part and vertical pipes, wherein the bottom end of the vertical part is communicated with the horizontal part, the horizontal part extends from the bottom end of the vertical part to the direction far away from the vertical part, the lower part of the horizontal part is communicated with a plurality of vertical pipes, the vertical pipes are evaporation ends of the heat pipe, the vertical parts are condensation ends of the heat pipe, and the vertical pipes and the horizontal parts are arranged in a smoke channel; the flue gas purification device is characterized in that a plurality of vertical pipes are arranged, and the pipe diameters of the vertical pipes are smaller and smaller along the flow direction of flue gas;
along the flowing direction of the flue gas, the pipe diameter of the vertical pipe is gradually increased in a smaller and smaller range; along the flue gas flow direction, the horizontal partIs L, along the flow direction of the flue gas, the pipe diameter of the vertical pipe at the tail part of the heat pipe is DTailThen, the rule of the diameter D of the vertical pipe at the position l away from the tail of the heat pipe is as follows: d2＝b*（DTail）2+c*（DTail）2*（l/L）aWherein a, b and c are coefficients, and the following requirements are met:
1.085<a<1.125,0.985<b+c<1.015，0.485<b<0.645。
2. a heat pipe as claimed in claim 1 wherein said vertical portion is disposed in an air channel.
3. A heat pipe as claimed in claim 1 wherein a is progressively reduced as L/L increases.
4. A heat pipe as claimed in claim 1 wherein 1.093< a <1.106, b + c =1, 0.548< b < 0.573.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195987.5A CN109631630B (en) | 2018-03-09 | 2018-03-09 | Heat pipe with variable vertical pipe diameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810195987.5A CN109631630B (en) | 2018-03-09 | 2018-03-09 | Heat pipe with variable vertical pipe diameter |
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| Publication Number | Publication Date |
|---|---|
| CN109631630A CN109631630A (en) | 2019-04-16 |
| CN109631630B true CN109631630B (en) | 2020-06-05 |
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| CN201810195987.5A Expired - Fee Related CN109631630B (en) | 2018-03-09 | 2018-03-09 | Heat pipe with variable vertical pipe diameter |
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| CN102859309A (en) * | 2009-12-24 | 2013-01-02 | 通用压缩股份有限公司 | Methods and devices for optimizing heat transfer within a compression and/or expansion device |
| CN106595358A (en) * | 2016-08-20 | 2017-04-26 | 杨丙 | Immersed heat exchange tube assembly with changed heating power |
| CN107462095A (en) * | 2017-08-31 | 2017-12-12 | 南昌大学 | A kind of thermal siphon of variable heat conduction |
| CN207863940U (en) * | 2018-01-30 | 2018-09-14 | 程煦 | A kind of shale gas exploitation system using hot pipe technique |
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2018
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| CN1348540A (en) * | 1999-02-26 | 2002-05-08 | 坦普拉技术公司 | Preparation of heat sink materials |
| CN102859309A (en) * | 2009-12-24 | 2013-01-02 | 通用压缩股份有限公司 | Methods and devices for optimizing heat transfer within a compression and/or expansion device |
| CN106595358A (en) * | 2016-08-20 | 2017-04-26 | 杨丙 | Immersed heat exchange tube assembly with changed heating power |
| CN107462095A (en) * | 2017-08-31 | 2017-12-12 | 南昌大学 | A kind of thermal siphon of variable heat conduction |
| CN207863940U (en) * | 2018-01-30 | 2018-09-14 | 程煦 | A kind of shale gas exploitation system using hot pipe technique |
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