CN109916206B - Loop heat pipe - Google Patents
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- CN109916206B CN109916206B CN201810601187.9A CN201810601187A CN109916206B CN 109916206 B CN109916206 B CN 109916206B CN 201810601187 A CN201810601187 A CN 201810601187A CN 109916206 B CN109916206 B CN 109916206B
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Abstract
The invention provides a loop heat pipe which comprises an evaporation collecting pipe, a condensation collecting pipe, a rising pipe and a return pipe, wherein a separation device is arranged in the rising pipe, the separation device is of a sheet structure, and the sheet structure is arranged on the cross section of the rising pipe; the partition device is composed of a square and a regular octagon structure, the side length of the square is equal to that of the regular octagon, four sides of the square are respectively sides of four different regular octagons, and four mutually spaced sides of the regular octagon are respectively sides of four different squares. The invention provides a loop heat pipe with a novel separation structure, which can strengthen heat transfer when vapor-liquid two-phase flow exists in an ascending pipe, and simultaneously weaken the vibration of the ascending pipe and reduce the noise level.
Description
Technical Field
The invention belongs to the field of heat pipes, and particularly relates to a loop heat pipe.
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, the heat pipe is widely applied to various heat exchange devices, including the field of nuclear power, such as the utilization of waste heat of nuclear power.
On the one hand, the heat pipe is in the evaporation process, inevitable can carry liquid to in the riser, simultaneously because the exothermic condensation of condensation end to there is liquid in making the condensation end, liquid inevitable entering riser, thereby make the fluid in the riser be vapour-liquid mixture, the heat pipe can be because the noncondensable gas of ageing production simultaneously in the operation process, noncondensable gas generally rises to the condensation end on heat pipe upper portion, the existence of noncondensable gas leads to the interior pressure increase of heat pipe condensation end, pressure makes liquid flow to in the riser. Greatly influencing the heat exchange efficiency.
On the other hand, in the section from the outlet of the ascending pipe to the condensation header, because the space of the section is suddenly enlarged, the change of the space can cause the gas to rapidly flow out and gather upwards, so the change of the space can cause the gathered vapor phase (vapor mass) to enter the condensation header from the position of the ascending pipe, the vapor mass moves rapidly upwards from the position of the connecting pipe due to the poor liquid tightness of the vapor (vapor), and the liquid at the original space position of the vapor mass pushed away from the wall surface by the vapor mass can also rapidly rebound and impact the wall surface to form an impact phenomenon. The more discontinuous the gas (vapor) liquid phase, the larger the mass of gas is gathered and the greater the impact energy. The impact phenomenon can cause larger noise vibration and mechanical impact, and damage to equipment.
The inventor also devised various heat pipe devices, such as a multi-pipe type, which solve the above problems, but such devices have found that in operation, because the pipes are tightly combined together, the space a formed between the three pipes is relatively small, because the space a is formed by the convex arcs of the three pipes, most of the area of the space a is narrow, the fluid is difficult to enter and pass through, the fluid is short-circuited, the heat exchange of the fluid is affected, and the good flow stabilizing effect cannot be achieved. And also, since a plurality of tubes of the above-described structure are combined together, the manufacturing is difficult. For example, the 2017102671998 structure solves the fluid short circuit phenomenon, but has a problem that the flow area is greatly reduced, resulting in an increase in flow resistance. As another example, the annular partition device 2017102949490 has an annular structure, which results in uneven circumferential partition of the annular space of the partition device as a whole, and because of the annular structure, the four included angles of the annular space are acute angles smaller than 90 degrees, which may cause a problem of short circuit of fluid flow at acute angles smaller than 90 degrees.
Aiming at the problems, the invention is improved on the basis of the prior invention, and provides a new heat pipe, thereby solving the problem of uneven steady flow heat exchange under the condition of heat exchange of the heat pipe. So that the gas and the liquid are fully mixed, and the heat exchange effect is improved
Disclosure of Invention
The present invention provides a new heat pipe to solve the above-mentioned technical problems.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a loop heat pipe comprises an evaporation collecting pipe, a condensation collecting pipe, an ascending pipe and a return pipe, wherein the ascending pipe is communicated with the evaporation collecting pipe and the condensation collecting pipe, the evaporation collecting pipe is positioned at the lower part, the condensation collecting pipe is positioned at the upper part, fluid is subjected to heat absorption and evaporation in the evaporation collecting pipe, enters the condensation collecting pipe through the ascending pipe, is subjected to heat exchange in the condensation collecting pipe and then is condensed, and the condensed fluid returns to the evaporation collecting pipe through the return pipe; the device is characterized in that a separation device is arranged in the ascending pipe, the separation device is of a sheet structure, and the sheet structure is arranged on the cross section of the ascending pipe; the partition device is composed of square through holes and regular octagonal through holes, the side length of each square through hole is equal to that of each regular octagonal through hole, four sides of each square through hole are sides of four different regular octagonal through holes respectively, and four mutually spaced sides of each regular octagonal through hole are sides of four different square through holes respectively.
Preferably, the cross-section of the riser pipe is square.
Preferably, the diameter of the riser pipe increases continuously in the direction of fluid flow.
Preferably, the pipe diameter of the riser pipe increases more and more continuously along the direction of fluid flow.
Preferably, a plurality of spacers are arranged in the riser, the spacers are at a distance H from the inlet of the riser, and the spacers are at a distance S, S ═ F between adjacent spacers1(H) The following requirements are met:
S’<0,S”>0。
preferably, a plurality of spacers are arranged in the riser, the distance from the inlet of the riser is H, the side length of the square through hole is C, and C is equal to F2(H) The following requirements are met:
C’<0,C”>0。
preferably, a plurality of spacers are arranged in the riser pipe at a distance H from the riser pipe inlet, the riser pipe has a diameter D, D ═ F3(H) The following requirements are met:
D’>0,D”>0。
preferably, the inner wall of the ascending pipe of the partition device is provided with a gap, and the outer end of the partition device is arranged in the gap.
Preferably, the ascending pipe is formed by welding a multi-section structure, and a separation device is arranged at the joint of the multi-section structure.
Preferably, the distance between the adjacent separating devices is S1, the side length of the square through hole is L1, the riser pipe is of a square section, and the side length of the square section of the riser pipe is L2, so that the following requirements are met:
S1/L2＝a*(L1/L2)2+b*(L1/L2)-c
wherein a, b, c are parameters, wherein 39.8< a <40.1,9.19< b <9.21, 0.43< c < 0.44;
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
more preferably, a is 39.87, b is 9.20, and c is 0.432
Further preferably, a and b become larger and smaller as L1/L2 increases.
Preferably, as L2 increases, L1 also increases. However, as L2 increases, L1 increases by a lesser and lesser magnitude.
Preferably, S1 decreases as L2 increases. But as L2 increases, S1 decreases by a lesser and lesser magnitude.
Preferably, the evaporation portion includes a plurality of rising pipes, and the plurality of rising pipes are parallel.
Preferably, the distance between adjacent separators is S1, the side length of the square is L1, the riser pipe has a square section, the side length of the riser pipe is L2, and the distance between the centers of the adjacent riser pipes is S2, so that the following requirements are met:
the distance between adjacent separating devices is S1, the side length of the square is L1, the riser pipe is a square section, the side length of the riser pipe is L2, and the distance between the centers of the adjacent riser pipes is S2, so that the following requirements are met:
S2/L2＝d*(S1/L2)2+e-f*(S1/L2)3-h*(S1/L2)；
wherein d, e, f, h are parameters,
0.280<d<0.285,1.342<e<1.350,0.060<f<0.065,0.169<h<0.171；
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
16<S2<76mm。
preferably, d, e are larger and f, h are smaller as S1/L2 is increased.
Preferably, S2 increases with increasing L2, but S2 increases with increasing L2 to a lesser and lesser extent.
Compared with the prior art, the invention has the following advantages:
1) the invention provides a novel separation device with a novel structure combining a square through hole and a regular octagon through hole, wherein the included angles formed by the edges of the formed square hole and the regular octagon hole are larger than or equal to 90 degrees through the square and the regular octagon, so that fluid can fully flow through each position of each hole, and the short circuit of fluid flow is avoided or reduced. The invention separates the two-phase fluid into liquid phase and gas phase by the separating device with a novel structure, divides the liquid phase into small liquid groups, divides the gas phase into small bubbles, inhibits the backflow of the liquid phase, promotes the smooth flowing of the gas phase, plays a role in stabilizing the flow, has the effects of vibration reduction and noise reduction, and improves the heat exchange effect. Compared with the separation device in the prior art, the flow stabilizing effect is further improved, the heat transfer is enhanced, and the manufacture is simple.
2) According to the invention, through reasonable layout, the square and regular octagonal through holes are uniformly distributed, so that the fluid on the whole cross street is uniformly divided, and the problem of nonuniform division of the annular structure along the circumferential direction in the prior art is avoided.
3) The invention ensures that the large holes and the small holes are uniformly distributed on the whole cross section by uniformly distributing the square holes and the regular octagonal holes at intervals, and ensures that the separation effect is better by changing the positions of the large holes and the small holes of the adjacent separation devices.
4) According to the invention, the separating device is of a sheet structure, so that the separating device is simple in structure and low in cost.
5) According to the invention, the optimal relation size of the parameters is researched by setting the regular changes of the parameters such as the distance between the adjacent separating devices, the side length of the holes of the separating devices, the pipe diameter of the ascending pipe, the pipe spacing and the like in the height direction of the ascending pipe, so that the flow stabilizing effect is further achieved, the noise is reduced, and the heat exchange effect is improved.
6) According to the invention, through carrying out extensive research on the heat exchange rule caused by the change of each parameter of the annular separation device, the optimal relational expression of the vibration and noise reduction effects is realized under the condition of meeting the flow resistance.
Drawings
FIG. 1 is a schematic view of a heat pipe configuration of the present invention;
FIG. 2 is a schematic cross-sectional view of a partitioning device of the present invention;
FIG. 3 is a schematic view of another cross-sectional configuration of the partitioning device of the present invention;
FIG. 4 is a schematic view of the arrangement of the spacers of the present invention within the riser;
FIG. 5 is a schematic cross-sectional view of the disposition of the spacers of the present invention within the riser.
In the figure: 1. evaporation header, 2 condensation header, 3 riser, 4, separating device, 41 square through hole, 42 regular octagon through hole, 43 sides, 5, return 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.
A heat pipe as shown in fig. 1 comprises an evaporation header 1, a condensation header 2, a rising pipe 3 and a return pipe 5, wherein the rising pipe 3 is communicated with the evaporation header 1 and the condensation header 2, the evaporation header 1 is positioned at the lower part, the condensation header 2 is positioned at the upper part, the fluid is evaporated in the evaporation header 1 by heat absorption, enters the condensation header 2 through the rising pipe 3, is condensed after heat exchange in the condensation header 2, and the condensed fluid returns to the evaporation header 1 through the return pipe 5.
A partition 4 is arranged in the riser, said partition 4 being constructed as shown in figures 2 and 3. Said spacer 4 is a sheet-like structure arranged on the cross section of the rising pipe 3; the spacers 4 are made of square and regular octagonal structures, thereby forming square through holes 41 and regular octagonal through holes 42. The side length of the square through-hole 41 is equal to the side length of the regular octagonal through-hole 42 as shown in fig. 1, the four sides 43 of the square through-hole are the sides 43 of four different regular octagonal through-holes, respectively, and the four mutually spaced sides 43 of the regular eight deformed through-hole are the sides 43 of four different square through-holes, respectively.
The invention adopts a separating device with a novel structure, and has the following advantages:
1) the invention provides a novel separation device with a novel structure combining a square through hole and a regular octagon through hole, wherein the included angles formed by the edges of the formed square hole and the regular octagon hole are larger than or equal to 90 degrees through the square and the regular octagon, so that fluid can fully flow through each position of each hole, and the short circuit of fluid flow is avoided or reduced. The invention separates the two-phase fluid into liquid phase and gas phase by the separating device with a novel structure, divides the liquid phase into small liquid groups, divides the gas phase into small bubbles, inhibits the backflow of the liquid phase, promotes the smooth flowing of the gas phase, plays a role in stabilizing the flow, has the effects of vibration reduction and noise reduction, and improves the heat exchange effect. Compared with the separation device in the prior art, the flow stabilizing effect is further improved, the heat transfer is enhanced, and the manufacture is simple.
2) According to the invention, through reasonable layout, the square and regular octagonal through holes are uniformly distributed, so that the fluid on the whole cross street is uniformly divided, and the problem of nonuniform division of the annular structure along the circumferential direction in the prior art is avoided.
3) According to the invention, the square holes and the regular octagonal through holes are uniformly distributed at intervals, so that the large holes and the small holes are uniformly distributed on the whole cross section, and the separation effect is better through the position change of the large holes and the small holes of the adjacent separation devices.
4) According to the invention, the separating device is of a sheet structure, so that the separating device is simple in structure and low in cost.
By arranging the annular separating device, the invention equivalently increases the internal heat exchange area in the heat exchange tube, strengthens the heat exchange and improves the heat exchange effect.
The invention divides the gas phase and the liquid phase at all cross section positions of all heat exchange tubes, thereby realizing the contact area between the division of a gas-liquid interface and a gas phase boundary layer and a cooling wall surface on the whole heat exchange tube section and enhancing the disturbance, greatly reducing the noise and the vibration and strengthening the heat transfer.
Preferably, the condensing header 2 is internally provided with heat exchange tubes, and the fluid in the heat exchange tubes exchanges heat with the steam in the condensing header 2.
Preferably, the rising pipes 3 and the evaporation header 1 are heat absorbing portions.
Preferably, the spacers are of two types, as shown in FIGS. 2 and 3, the first type being a square central spacer, the square being located in the centre of the riser or condenser tube, as shown in FIG. 3. The second is a regular octagonal central divider, with the regular octagon being centered in the riser or condenser tubes, as shown in FIG. 2. Preferably, the two types of spacers are arranged next to each other, i.e. the type of spacers arranged next to each other is different. I.e. adjacent to the square centre spacer is a regular octagonal centre spacer and adjacent to the regular octagonal centre spacer is a square centre spacer. According to the invention, the square holes and the regular octagon holes are uniformly distributed at intervals, so that the large holes and the small holes are uniformly distributed on the whole cross section, and through the position change of the large holes and the small holes of the adjacent separation devices, the fluid passing through the large holes next passes through the small holes, and the fluid passing through the small holes next passes through the large holes to be further separated, so that the mixing of vapor and liquid is promoted, and the separation and heat exchange effects are better.
Preferably, said riser 3 has a square cross-section.
Preferably, the pipe diameter of the rising pipe 3 is continuously increased in the direction of fluid flow. The main reasons are as follows: 1) by increasing the pipe diameter of the ascending pipe, the flowing resistance can be reduced, so that the vapor evaporated in the ascending pipe continuously moves towards the direction of increasing the pipe diameter, and the circulating flow of the loop heat pipe is further promoted. 2) Because the liquid is continuously evaporated in the ascending pipe along with the continuous flowing of the fluid, the volume of the steam is larger and larger, and the pressure is also larger and larger, the change of the volume and the pressure of the steam which are continuously increased is met by increasing the pipe diameter, and the pressure is uniformly distributed on the whole. 3) By increasing the pipe diameter of the ascending pipe, the impact phenomenon caused by the increase of the volume of the steam outlet can be reduced.
Preferably, the pipe diameter of the rising pipe 3 is continuously increased with an increasing magnitude along the direction of fluid flow. The amplitude change of the pipe diameter is a result obtained by a large number of experiments and numerical simulation by the applicant, and through the arrangement, the circulating flow of the loop heat pipe can be further promoted, the pressure is integrally uniform, and the impact phenomenon is reduced.
Preferably, a plurality of spacers are provided in the riser, the spacing between the spacers decreasing from the inlet of the riser 3 to the outlet of the riser 3. The distance from the inlet of the ascending pipe is H, the distance between adjacent separating devices is S, and S is F1(H) I.e. S is a function of the height H as a variable, S' is the first derivative of S, satisfying the following requirements:
S’<0；
the main reason is that the gas in the ascending pipe carries liquid in the ascending process, the ascending pipe is continuously heated in the ascending process, so that more and more gas in gas-liquid two-phase flow is caused, the gas phase in the gas-liquid two-phase flow is increased, the heat exchange capacity in the ascending pipe is relatively weakened along with the increase of the gas phase, and the vibration and the noise are also continuously increased along with the increase of the gas phase. The distance between adjacent spacers that needs to be provided is shorter and shorter.
In addition, the section from the outlet of the ascending pipe to the upper collecting pipe or the condensing collecting pipe is suddenly enlarged in space, the change of the space can cause the gas to rapidly flow out and collect upwards, so the change of the space can cause the collected vapor phase (vapor mass) to enter the condensing collecting pipe from the position of the ascending pipe, the vapor mass moves rapidly upwards from the position of the connecting pipe due to the difference of the liquid density of the vapor (vapor), and the liquid of the original space position of the vapor mass pushed away from the wall surface by the vapor mass can also rapidly rebound and impact the wall surface to form an impact phenomenon. The more discontinuous the gas (vapor) liquid phase, the larger the gas mass accumulation and the larger the water hammer energy. The impact phenomenon can cause larger noise vibration and mechanical impact, and damage to equipment. Therefore, in order to avoid the phenomenon, the distance between adjacent separation devices is set to be shorter and shorter, so that the gas phase and the liquid phase are continuously separated in the fluid conveying process, and vibration and noise are reduced to the maximum extent.
Through the experiment discovery, through foretell setting, both can reduce vibrations and noise to the at utmost, can improve the heat transfer effect simultaneously.
It is further preferred that the distance between adjacent spacers is increasing in decreasing magnitude from the inlet of the rising pipe 3 to the outlet of the rising pipe 3. I.e. S "is the second derivative of S, the following requirements are met:
S”>0；
through the experiment, the vibration and the noise of about 7% can be further reduced, and the heat exchange effect of about 8% is improved.
Preferably, a plurality of partitions are provided in the riser, the sides of the squares decreasing from the inlet of the riser 3 to the outlet of the riser 3. The distance from the inlet of the ascending pipe is H, the side length of the square is C, and C is F2(H) And C' is the first derivative of C, and meets the following requirements:
C’<0；
it is further preferred that the side length of the square increases with decreasing amplitude from the inlet of the rising pipe 3 to the outlet of the rising pipe 3. C' is the second derivative of C, and meets the following requirements:
C”>0。
see the previous spacer spacing variation for specific reasons.
Preferably, the distance between adjacent spacers remains constant.
Preferably, the inner wall of the ascending pipe is provided with a gap, and the outer end of the separation device is arranged in the gap.
Preferably, the ascending pipe is formed by welding a multi-section structure, and a separation device is arranged at the joint of the multi-section structure.
Through analysis and experiments, the spacing between the separating devices cannot be too large, the damping and noise reduction effect is poor if the spacing is too large, meanwhile, the spacing cannot be too small, the resistance is too large if the spacing is too small, and similarly, the side length of a square cannot be too large or too small, the damping and noise reduction effect is poor or the resistance is too large, so that the damping and noise reduction can be optimized under the condition that the normal flow resistance (the total pressure bearing is less than 2.5Mpa or the on-way resistance of a single ascending pipe is less than or equal to 5Pa/M) is preferentially met through a large number of experiments, and the optimal relation of each parameter is arranged.
Preferably, the distance between the adjacent separating devices is S1, the side length of the square through hole is L1, the riser pipe is of a square section, and the side length of the square section of the riser pipe is L2, so that the following requirements are met:
S1/L2＝a*(L1/L2)2+b*(L1/L2)-c
wherein a, b, c are parameters, wherein 39.8< a <40.1,9.19< b <9.21, 0.43< c < 0.44;
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
more preferably, a is 39.87, b is 9.20, c is 0.432
Further preferably, a, b are larger and c is smaller as L1/L2 is increased.
Preferably, the side length L1 of the square through hole is an average value of the inner side length and the outer side length of the square through hole, and the side length L2 of the square cross section of the ascending tube is an average value of the inner side length and the outer side length of the ascending tube.
Preferably, the outer length of the square through hole is equal to the inner length of the square section of the riser.
Preferably, as L2 increases, L1 also increases. However, as L2 increases, L1 increases by a lesser and lesser magnitude. The change of the rule is obtained through a large amount of numerical simulation and experiments, and the heat exchange effect and the noise are further improved and reduced through the change of the rule.
Preferably, S1 decreases as L2 increases. But as L2 increases, S1 decreases by a lesser and lesser magnitude. The change of the rule is obtained through a large amount of numerical simulation and experiments, and the heat exchange effect and the noise are further improved and reduced through the change of the rule.
Learn through analysis and experiment that the interval of tedge also satisfies certain requirement, for example can not too big or undersize, no matter too big or undersize can lead to the heat transfer effect not good, because set up separator in this application tedge moreover, consequently separator also has certain requirement to the tedge interval. Therefore, through a large number of experiments, under the condition that the normal flow resistance (the total pressure bearing is less than 2.5MPa, or the on-way resistance of a single ascending pipe is less than or equal to 5Pa/M) is preferentially met, the damping and noise reduction are optimized, and the optimal relation of each parameter is arranged.
The distance between adjacent separating devices is S1, the side length of the square is L1, the riser pipe is a square section, the side length of the riser pipe is L2, and the distance between the centers of the adjacent riser pipes is S2, so that the following requirements are met:
S2/L2＝d*(S1/L2)2+e-f*(S1/L2)3-h*(S1/L2)；
wherein d, e, f, h are parameters,
0.280<d<0.285,1.342<e<1.350,0.060<f<0.065,0.169<h<0.171；
9<L2<58mm；
1.9<L1<3.4mm；
15<S1<31mm。
16<S2<76mm。
the spacing between the centers of adjacent risers at S2 is the distance between the centerlines of the risers.
More preferably, d is 0.282, e is 1.347, f is 0.062, and h is 0.170;
preferably, d, e are larger and f, h are smaller as S1/L2 is increased.
Preferably, S2 increases with increasing L2, but S2 increases with increasing L2 to a lesser and lesser extent. The change of the rule is obtained through a large amount of numerical simulation and experiments, and the heat exchange effect can be further improved through the change of the rule.
Preferably, the length L of the ascending pipe is between 2000 and 2500 mm. More preferably, 2200-.
By optimizing the optimal geometric dimension of the formula, the optimal effect of shock absorption and noise reduction can be achieved under the condition of meeting the normal flow resistance.
For other parameters, such as the wall thickness of the pipe and the wall thickness of the shell, the parameters are set according to normal standards.
Preferably, the fluid within the heat pipe is water.
Preferably, the pipe diameter of the evaporation header 1 is smaller than that of the condensation header 2.
The evaporation header has an internal diameter of R1 and the condensation header has an internal diameter of R2, preferably 0.45< R1/R2< 0.88.
Through the arrangement, heat transfer can be further enhanced, and the heat exchange efficiency can be improved by more than 7%.
Preferably, the pipe diameter of the ascending pipe is larger than that of the return pipe. The resistance of the return pipe is mainly increased, and the resistance of the ascending pipe is reduced, so that the steam flows from the evaporation part more easily, and the loop heat pipe forms circulation better.
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 loop heat pipe comprises an evaporation collecting pipe, a condensation collecting pipe, an ascending pipe and a return pipe, wherein the ascending pipe is communicated with the evaporation collecting pipe and the condensation collecting pipe, the evaporation collecting pipe is positioned at the lower part, the condensation collecting pipe is positioned at the upper part, fluid is absorbed and evaporated in the evaporation collecting pipe, enters the condensation collecting pipe through the ascending pipe, is condensed after heat exchange in the condensation collecting pipe, and the condensed fluid returns to the evaporation collecting pipe through the return pipe; the device is characterized in that a separation device is arranged in the ascending pipe, the separation device is of a sheet structure, and the sheet structure is arranged on the cross section of the ascending pipe; the partition device is composed of square through holes and regular octagonal through holes, the side length of each square through hole is equal to that of each regular octagonal through hole, four sides of each square through hole are sides of four different regular octagonal through holes respectively, and four mutually spaced sides of each regular octagonal through hole are sides of four different square through holes respectively.
2. The loop heat pipe of claim 1 wherein said riser tube is square in cross-section.
3. A heat pipe as claimed in claim 1 wherein said riser inner wall is provided with a gap and said outer end of said partition means is disposed within said gap.
4. The heat pipe of claim 1 wherein the riser tube is formed by welding a plurality of segments, the segments being joined by a spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601187.9A CN109916206B (en) | 2018-06-12 | 2018-06-12 | Loop heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810601187.9A CN109916206B (en) | 2018-06-12 | 2018-06-12 | Loop heat pipe |
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| Publication Number | Publication Date |
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| CN109916206A CN109916206A (en) | 2019-06-21 |
| CN109916206B true CN109916206B (en) | 2020-05-26 |
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| CN201810601187.9A Expired - Fee Related CN109916206B (en) | 2018-06-12 | 2018-06-12 | Loop heat pipe |
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| JP2012202586A (en) * | 2011-03-24 | 2012-10-22 | Nippon Telegr & Teleph Corp <Ntt> | Stack for thermoacoustic device and manufacturing method of stack for thermoacoustic device |
| CN105605945B (en) * | 2015-12-30 | 2017-07-28 | 于仁麟 | A kind of different triangle through hole heat exchanger of base length |
| CN107044789B (en) * | 2017-04-21 | 2019-02-15 | 青岛金玉大商贸有限公司 | A kind of porous constant-current stabilizer heat pipe |
| CN107131783B (en) * | 2017-04-21 | 2018-11-16 | 青岛金玉大商贸有限公司 | A kind of porous constant-current stabilizer loop circuit heat pipe |
| CN107167009B (en) * | 2017-04-28 | 2019-03-08 | 山东大学 | The annular and separation device loop circuit heat pipe of hydraulic diameter variation |
| CN107062960B (en) * | 2017-04-28 | 2018-11-16 | 山东大学 | A kind of loop circuit heat pipe of annular and separation device short transverse variation |
| CN107167010B (en) * | 2017-04-28 | 2019-03-08 | 山东大学 | A kind of loop circuit heat pipe |
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