US20180010860A1 - Multi-pipe three-dimensional plusating heat pipe - Google Patents

Multi-pipe three-dimensional plusating heat pipe Download PDF

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Publication number
US20180010860A1
US20180010860A1 US15/269,034 US201615269034A US2018010860A1 US 20180010860 A1 US20180010860 A1 US 20180010860A1 US 201615269034 A US201615269034 A US 201615269034A US 2018010860 A1 US2018010860 A1 US 2018010860A1
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Prior art keywords
pipe
heat pipe
pulsating heat
dimensional
dimensional pulsating
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US15/269,034
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English (en)
Inventor
Chih-Yung Tseng
Kai-Shing Yang
Shih-Kuo Wu
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Industrial Technology Research Institute ITRI
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Industrial Technology Research Institute ITRI
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Assigned to INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE reassignment INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TSENG, CHIH-YUNG, WU, SHIH-KUO, YANG, KAI-SHING
Publication of US20180010860A1 publication Critical patent/US20180010860A1/en
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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
    • 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
    • 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
    • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • 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
    • F28D15/0283—Means for filling or sealing heat pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/10—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by imparting a pulsating motion to the flow, e.g. by sonic vibration
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0472—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being helically or spirally coiled
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form

Definitions

  • Taiwan (International) Application Serial Number 105121605 filed on Jul. 7, 2016, the disclosure of which is hereby incorporated by reference herein in its entirety.
  • the present disclosure relates to a heat pipe for heat dissipation, and more particularly to a multi-pipe three-dimensional pulsating heat pipe that is structured by a 3D (three-dimensional) stacking arrangement.
  • the heat pipe is well known to have excellent thermal characterization, and thus is widely applied to heat-dissipate electronic elements, particularly personal computers and notebook computers.
  • a heat-dissipation need for a plane heat source it is as usual to implement a plurality of heat pipes to meet the heat-dissipation need.
  • the design for applying multiple heat pipes at the same time would cause manufacturing and assembling difficulty in heat-dissipation modules.
  • the planar heat pipe or the vapor chamber would be more appropriate than the conventional heat pipe.
  • a conventional pulsating heat pipe is generally a heat-dissipation member consisted of several bent pipes.
  • a two-phase flow pulsation phenomenon in the heat pipe is produced by an in-pipe pressure difference caused by the heated work fluid of the heat pipe. Such a phenomenon can push the work fluid to flow back to the evaporation end of the heat pipe without a capillary structure.
  • air bubbles and the fluid segments in heat pipe can be easily and automatically driven to form an in-pipe circulation, such that heat at or outside one specific portion of the heat pipe can be conveyed distantly to be dissipated through another portion of the same heat pipe.
  • the pulsation technique in heat piping is much more appropriate to be applied to a product with mass heat transfer amount and an extended transfer range.
  • the pulsating heat pipe does have a structural limitation in the radius of curvature for the bent pipes, by which the manufacturing difficulty is increased. As a tiny radius of curvature is met, the pipe is vulnerable to be over deformed or evenly fractured. Thus, the application of this pulsation technique is still limited.
  • the production of the bent pipes requires additional specific tooling for the bending task, and thus an increase of cost in manufacturing the heat pipe with bent piping would be inevitable.
  • the object of the present disclosure to provide a multi-pipe three-dimensional pulsating heat pipe that the performance can be enhanced, the manufacturing can be convenient, and the production cost can be reduced.
  • the multi-pipe three-dimensional pulsating heat pipe includes at least two pipes and at least two chambers.
  • Each of the at least two pipes is formed into repeated three-dimensional annular loops, and at least one side of the annular loops is defined as a cooling area.
  • the at least two chambers connect respectively and spatially to two opposing ends of each of the at least two pipes so as to form the multi-pipe three-dimensional pulsating heat pipe.
  • the multi-pipe three-dimensional pulsating heat pipe of this disclosure at least two opposing ends of the pipes are installed with individual chambers for bifurcating and refilling the work fluid, and also the annular loops produced according to the 3D stacking pattern would prevent the multi-pipe three-dimensional pulsating heat pipe from the influence of bending and curving upon the pipes.
  • the cooling area to be formed at one side of the annular loops at least according to the tight stacking no invalid area would be produced to degrade the heat transfer.
  • a close face-to-face heat transfer pattern can be established to significantly enhance the heat flux.
  • FIG. 1 is a schematic perspective view of a first embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure
  • FIG. 2 shows a portion of the annular loops at a side of the multi-pipe three-dimensional pulsating heat pipe of FIG. 1 ;
  • FIG. 3 is a schematic left-hand-side view of FIG. 1 ;
  • FIG. 4 is a schematic view of a second embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure
  • FIG. 5 is a schematic view of a third embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 6 is a schematic view of a fourth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 7 is a schematic view of a fifth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 8 is a schematic view of a sixth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 9 is a schematic view of a seventh embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 10 is a schematic view of an eighth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure.
  • FIG. 1 is a schematic perspective view of a first embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure
  • FIG. 2 shows a portion of the annular loops at a side of the multi-pipe three-dimensional pulsating heat pipe of FIG. 1 .
  • an orthogonal X-Y-Z coordinate system is defined, in which the first axis is the axis X extending in an X-axial direction, the second axis is the axis Y extending in a Y-axial direction, and the third axis is the axis Z extending in a Z-axial direction.
  • the multi-pipe three-dimensional pulsating heat pipe 100 includes at least two pipes and at least two chambers 120 .
  • the multi-pipe three-dimensional pulsating heat pipe 100 includes a first pipe 112 , a second pipe 114 , a third pipe 116 , and two chambers 120 .
  • the first pipe 112 , the second pipe 114 and the third pipe 116 are parallel arranged into a tri-pipe assembly, and this tri-pipe assembly is structured to be repeated annular loops as shown in FIG. 1 .
  • the annular loops integrally include an outer-frame portion 110 and a central empty portion 130 , in which the outer-frame portion 110 is consisted of a first side A 1 , a second side A 2 , a third side A 3 and a fourth side A 4 .
  • the first side A 1 and the second side A 2 are located to form two opposing horizontal sides of the outer-frame portion 110 in the Y-axial direction, while the third side A 3 and the fourth side A 4 are located to form two opposing vertical sides of the outer-frame portion 110 in the X-axial direction.
  • the annular loops are formed to be a 3D rectangular frame structure.
  • the first pipe 112 , the second pipe 114 and the third pipe 116 are firstly parallel integrated into the tri-pipe assembly. Then, the tri-pipe assembly is bent continuously along a rectangular pattern several times in a collapse or stacking manner so as to form the 3D rectangular frame structure of FIG. 1 having the outer-frame portion 110 (formed by the circling pipes) and the central empty portion 130 (encircled by the circling pipes).
  • the first side A 1 of the outer-frame portion 110 is located on a lower X-Z plane
  • the second side A 2 of the outer-frame portion 110 is located on an upper X-Z plane opposing to the first side A 3 by crossing the central empty portion 130
  • the third side A 3 of the outer-frame portion 110 is located on a Y-Z plane
  • the fourth side A 4 of the outer-frame portion 110 is located on another Y-Z plane opposing to the third side A 3 by crossing the central empty portion 130 .
  • the annular loops are then formed into the 3D rectangular frame structure according to the 3D stacking pattern and, particularly in FIG. 1 , into a symmetric structure.
  • the 3D annular loops can be formed into an asymmetric structure or another symmetric structure, specifically according to different practical needs.
  • the two chambers 120 are the structured to two opposing ends of tri-pipe assembly consisted of the first pipe 112 , the second pipe 114 and the third pipe 116 in parallel. By having these two chambers 120 , the first pipe 112 , the second pipe 114 , the third pipe 116 , and the two chambers 120 can then be formed to have a connected interior space for the multi-pipe three-dimensional pulsating heat pipe 100 in this disclosure. While in application, this connected interior space can accommodate the work fluid.
  • At least one side of the aforesaid annular loops of the multi-pipe three-dimensional pulsating heat pipe 100 is adopted to form a cooling area.
  • the first pipe 112 , the second pipe 114 and the third pipe 116 located at the first side A 1 of the annular loops is tightly integrated to form the cooling area.
  • a planar cooling zone can then be formed for a particular heat transfer purpose.
  • the aforesaid pipes can be, but not limited to, metallic pipes.
  • the pipes can be non-metallic pipes.
  • all the aforesaid pipes can have, but not limited to, the same diameter or the same cross-sectional area. However, in some other embodiments, the pipes can have different diameters or different cross-sectional areas.
  • FIG. 3 a schematic left-hand-side view of FIG. 1 is shown. It shall be noted that, in order to have a concise description, some elements in FIG. 1 are now omitted in FIG. 3 . For details of these omitted elements, please refer back to FIG. 1 and related description.
  • the multi-pipe three-dimensional pulsating heat pipe 100 can construct an evaporation zone 140 and a condensation zone 150 to opposing sides of the heat pipe 100 , respectively.
  • the evaporation zone 140 of the multi-pipe three-dimensional pulsating heat pipe 100 is located at the first side A 1
  • the condensation zone 150 of the multi-pipe three-dimensional pulsating heat pipe 100 is located at the second side A 2 .
  • the condensation zone of the multi-pipe three-dimensional pulsating heat pipe can be located at the first side A 1
  • the evaporation zone of the multi-pipe three-dimensional pulsating heat pipe is located at the second side A 2 .
  • the present disclosure does not limit the chambers 120 to be located in the condensation zone. Actually, in accordance with the present disclosure, the chambers 120 can be located at other places of the multi-pipe three-dimensional pulsating heat pipe 100 .
  • the heating source (not shown in the figure) is located at one side of the outer-frame portion 110 .
  • the heating source is located at the first side A 1 of the outer-frame portion 110 (namely the evaporation zone 140 ), and heat-dissipation fins can be mounted to the second side A 2 of the outer-frame portion 110 (namely the condensation zone) for heat dissipation.
  • the evaporation zone 140 to receive foreign heat energy is typically assigned to, but not limited to, the first side A 1 .
  • the multi-pipe three-dimensional pulsating heat pipe 100 further includes an anchorage member 160 located in the central empty portion 130 .
  • the anchorage member 160 can be a circuit structure, a mechanism, a heat-dissipation member, or any the like.
  • the repeating annular-loop structure including three parallel pipes and two chambers 120 located respectively to opposing ends of the pipes for bifurcating and also filling the work fluid, can perform annularly circulation and introduce the 3D stacking pattern for producing a tight stacking structure to lessen the effect of bending (that produces small radius of curvature to the pipe) upon the multi-pipe three-dimensional pulsating heat pipe 100 .
  • the work fluid water, methanol, acetone, or any pure liquid or solution the like
  • the work fluid inside the heat pipe 100 is flowed in a cross-flowing manner so as to produce unbalanced flowing, by which the difficulty for the work fluid to flow horizontally in the pulsating heat pipe can be resolved.
  • the heat pipe 100 of this disclosure can be operated in a negative 90-degree state (i.e. with the evaporation zone to be positioned above the condensation zone) so as to help the work fluid to flow back to the evaporation zone without substantial helps from the gravity. Further, heating of the work fluid can be operated no matter if the heat pipe 100 is posed at a horizontal or a negative-angling state.
  • the heat flux between the heat pipe 100 and the heat source can be significantly increased.
  • the multi-pipe three-dimensional pulsating heat pipe 100 of this disclosure is a symmetric structure, thus, while in manufacturing, the tri-pipe assembly is based on a specific annular pattern to extend continuously and to repeat according to the 3D stacking pattern, such that the annular loops as shown in FIG. 1 for the multi-pipe three-dimensional pulsating heat pipe 100 can be produced.
  • no further bending tool or jig as required in the conventional design is needed, such that the manufacturing can be efficiency and the production cost can be reduced.
  • FIG. 4 a schematic view of a second embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 200 of FIG. 4 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this second embodiment of FIG. 4 would be focused on the differences between this second embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the annular loop for each pipe is shaped to be a triangle, and the whole annular loops include an outer-frame portion 210 and a central empty portion 230 , in which the outer-frame portion 210 is consisted of a first side B 1 , a second side B 2 and a third side B 3 .
  • the first side B 1 of the annular loops is defined as a cooling area.
  • the annular loops of this second embodiment are formed to be a 3D triangular structure.
  • the first side B 1 defines an evaporation zone 240
  • both the second side B 2 and the third side B 3 define individual condensation zones 252 , 254 , respectively.
  • FIG. 5 a schematic view of a third embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is shown.
  • the multi-pipe three-dimensional pulsating heat pipe 300 of FIG. 5 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this third embodiment of FIG. 5 would be focused on the differences between this third embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the annular loop for each pipe is shaped to be a trapezoid, and the whole annular loops include an outer-frame portion 310 and a central empty portion 330 , in which the outer-frame portion 310 is consisted of a first side C 1 , a second side C 2 , a third side C 3 and a fourth side C 4 , and the first side C 1 .
  • the second side C 2 are the vertical-directional opposing sides of the outer-frame portion 310 , and a length of the second side C 2 is larger than that of the first side C 1 .
  • the third side C 3 and the fourth side C 4 are the horizontal-directional opposing sides of the outer-frame portion 310 .
  • the first side C 1 of the annular loops is defined as a cooling area. Similar to the aforesaid 3D stacking pattern, the annular loops of this third embodiment are formed to be a 3D trapezoidal structure.
  • the first side C 1 defines an evaporation zone 340
  • the second side C 2 defines a condensation zone 350 .
  • the 3D stacking pattern of this disclosure is not limited to form a 3D rectangular structure as shown in FIG. 3 .
  • the 3D triangular structure ( FIG. 4 ) and the 3D trapezoidal structure ( FIG. 5 ) are also exemplary embodiments for the 3D stacking pattern of the present disclosure.
  • the shape of the annular loops is determined mainly according to practical demands.
  • FIG. 6 a schematic view of a fourth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 400 of FIG. 6 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this fourth embodiment of FIG. 6 would be focused on the differences between this fourth embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the third side A 3 of the annular loops is defined as a cooling area.
  • a lower portion of the third side A 3 of the multi-pipe three-dimensional pulsating heat pipe 400 defines an evaporation zone 440 .
  • the fourth side A 4 of the multi-pipe three-dimensional pulsating heat pipe 400 defines a condensation zone 450 .
  • the heating source of FIG. 6 is located at the lateral side and has the evaporation zone 440 to be located lower than the condensation zone 450 .
  • FIG. 7 a schematic view of a fifth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 500 of FIG. 7 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this fifth embodiment of FIG. 7 would be focused on the differences between this fifth embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the second side A 2 of the annular loops is defined as a cooling area.
  • a middle portion of the second side A 2 of the multi-pipe three-dimensional pulsating heat pipe 500 defines an evaporation zone 540 .
  • the first side A 1 of the multi-pipe three-dimensional pulsating heat pipe 500 defines a condensation zone 550 .
  • the embodiment of FIG. 7 demonstrates an application of heating in an anti-gravity manner. Namely, in this embodiment, the evaporation zone 540 is located above the condensation zone 550 , i.e. operated in a negative 90-degree state. Even without the gravity to flow the work fluid back to the evaporation zone, the heat pipe 500 of this embodiment can still work.
  • FIG. 8 a schematic view of a sixth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 600 of FIG. 8 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this sixth embodiment of FIG. 8 would be focused on the differences between this sixth embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the second side A 2 of the annular loops is defined as a cooling area.
  • An upper portion of the third side A 3 of the multi-pipe three-dimensional pulsating heat pipe 600 defines an evaporation zone 640 .
  • a lower portion of the fourth side A 4 of the multi-pipe three-dimensional pulsating heat pipe 600 defines a condensation zone 650 .
  • the application of heating in an anti-gravity manner is also utilized in this embodiment. Namely, the evaporation zone 640 is located above the condensation zone 650 .
  • the evaporation zone is not necessary to position at the bottom side of the heat pipe, and, alternatively per practical demands, the lateral-side heating, the anti-gravity heating or a combination of the aforesaid heating is also a possible option.
  • FIG. 9 a schematic view of a seventh embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 700 of FIG. 9 is structurally similar to that 100 of FIG. 1 through FIG. 3 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this seventh embodiment of FIG. 9 would be focused on the differences between this seventh embodiment and the first embodiment of FIG. 1 through FIG. 3 .
  • the multi-pipe three-dimensional pulsating heat pipe 700 is structured to be a dual-layer heat-transferring module.
  • the annular loops include two outer-frame portions 110 and 770 .
  • the larger-size outer-frame portion 110 located outside thereof sleeves the smaller-size outer-frame portion 770 , preferably by a predetermined spacing.
  • a central empty portion 730 of the annular loops is located inside the smaller-size outer-frame portion 770 .
  • the evaporation zone 740 of the multi-pipe three-dimensional pulsating heat pipe 700 is located at a lower portion thereof between a bottom side of the larger-size outer-frame portion 110 and a bottom side of the smaller-size outer-frame portion 770 .
  • the condensation zone 750 is defined at the second side A 2 of the multi-pipe three-dimensional pulsating heat pipe 700 .
  • the heating source within the evaporation zone 740 can have both sides to dissipate heat to the lower larger-size outer-frame portion 110 and the upper smaller-size outer-frame portion 740 .
  • FIG. 10 a schematic view of an eighth embodiment of the multi-pipe three-dimensional pulsating heat pipe in accordance with this disclosure is illustrated.
  • the multi-pipe three-dimensional pulsating heat pipe 800 of FIG. 10 is structurally similar to that 700 of FIG. 9 .
  • the same elements in between would assigned the same numbers, and details thereabout would be omitted herein.
  • Following description upon this eighth embodiment of FIG. 10 would be focused on the differences between this eighth embodiment and the seventh embodiment of FIG. 9
  • the multi-pipe three-dimensional pulsating heat pipe 800 also has a dual-layer heat-transferring module.
  • the annular loops include two outer-frame portions 110 and 870 .
  • the larger-size outer-frame portion 110 located outside thereof sleeves the smaller-size outer-frame portion 870 , preferably by a predetermined spacing.
  • a central empty portion 830 of the annular loops is located inside the smaller-size outer-frame portion 870 .
  • the evaporation zone 840 of the multi-pipe three-dimensional pulsating heat pipe 800 is located at a first side A 1
  • the condensation zone 850 is defined at a second side A 2 of the multi-pipe three-dimensional pulsating heat pipe 800 .
  • the larger-size outer-frame portion 110 can contain a first work fluid
  • the smaller-size outer-frame portion 870 can contain a second work fluid.
  • the first work fluid is different to the second work fluid.
  • these two work fluids have different work temperature. For example, if the work fluid is the water, then the heat pipe would initiate the evaporation of the work fluid (in a comparative high-temperature region) while the work pressure is 0.3 atmosphere and the temperature reaches 69° C. Also, at this time, driving forces inside the heat pipe is sufficient to circulate the work fluid.
  • this embodiment of the multi-pipe three-dimensional pulsating heat pipe 800 formed as a dual-layer heat-transferring module, can provide two annular loops (the larger-size outer-frame portion aa 0 and the smaller-size outer-frame portion 870 ) to handle the comparative high-temperature region and the comparative low-temperature region, respectively.
  • the heat flux of the conventional pulsating heat pipe is 4 W/cm 2
  • the heat flux of the multi-pipe three-dimensional pulsating heat pipe of this disclosure is 33.3 W/cm 2 .
  • the heat flux of the instant multi-pipe three-dimensional pulsating heat pipe is 8 times of that of the conventional pulsating heat pipe.
  • the heat flux can be significantly enhanced.
  • the conventional pulsating heat pipe includes a plurality of pipes, and each of these pipes is bent to form an individual ophidian loop.
  • each of the individual ophidian loops is circularly formed to be an independent and sealed system.
  • spacing between pipes is inevitable.
  • the spacing between neighboring pipes would generate plenty of invalid areas for heat transfer.
  • the multi-pipe three-dimensional pulsating heat pipe of this disclosure introduces the 3D stacking pattern to waive the effect of curvatures upon the piping, so that a tight stacking structure can be produced to have the cooling area formed at one lateral side, at least, of the annular loops not to generate an invalid area.
  • a close face-to-face heat transfer pattern can be established to significantly enhance the heat flux.
  • the multi-pipe three-dimensional pulsating heat pipe of this disclosure at least two opposing ends of the pipes are installed with individual chambers for bifurcating and refilling the work fluid, and also the annular loops produced according to the 3D stacking pattern would prevent the multi-pipe three-dimensional pulsating heat pipe from the influence of bending and curving upon the pipes.
  • the cooling area to be formed at one side of the annular loops at least according to the tight stacking no invalid area would be produced to degrade the heat transfer.
  • a close face-to-face heat transfer pattern can be established to significantly enhance the heat flux.
  • the work fluid water, methanol, acetone, or any pure liquid or solution the like
  • the work fluid water, methanol, acetone, or any pure liquid or solution the like
  • gas/liquid segments of the work fluid would be produced and arbitrarily distributed inside the pipes.
  • opposing ends of the liquid segment may sustain different forcing, through which the gas segment would push the neighboring liquid segment to move and so as to generate the pulsation and circulation of the gas/liquid segments.
  • the work fluid can flow in a cross-flowing manner so as to produce unbalanced flowing, by which the difficulty for the work fluid to flow horizontally in the pulsating heat pipe can be resolved.
  • the heat pipe of this disclosure can be operated in a negative 90-degree state (i.e. with the evaporation zone to be positioned above the condensation zone) so as to help the work fluid to flow back to the evaporation zone without substantial helps from the gravity. Further, heating of the work fluid can be operated no matter whether the heat pipe is posed at a horizontal or a negative-angling state.
  • the multi-pipe three-dimensional pulsating heat pipe of this disclosure is a symmetric structure, thus, while in manufacturing, the tri-pipe assembly is based on a specific annular pattern to extend continuously and to repeat according to the 3D stacking pattern, such that the annular loops for the multi-pipe three-dimensional pulsating heat pipe of this disclosure can be produced. During the manufacturing, no further bending tool or jig as required in the conventional design is needed, such that the manufacturing can be efficiency and the production cost can be reduced.
  • the outer-frame portion can serve as supportive frame, while the central empty portion can accommodate an anchorage member such as a circuit structure, a mechanism, a heat-dissipation member, or any the like.
  • an anchorage member such as a circuit structure, a mechanism, a heat-dissipation member, or any the like.
  • the size or dimension of the annular loops can be relevantly adjusted.
  • the multi-pipe three-dimensional pulsating heat pipe in accordance with the present disclosure can serve both a heat pipe and a supportive frame.
  • the multi-pipe three-dimensional pulsating heat pipe in accordance with the present disclosure can also be used to dissipate a CPU, a COB (Chip on board) LED, a server, a data center, an industrial recycling of exhaust heat or any other high-power density field the like.
  • a modularization design can be adopted to the annular loops, so that the multi-pipe three-dimensional pulsating heat pipe can suit for various sizes of the objects to be heat-dissipated.
  • the aforesaid dual-layer heat-transferring module can be applied to have both sides of the heating source to be heat-dissipated simultaneously within the evaporation zone of the multi-pipe three-dimensional pulsating heat pipe of this disclosure, such that better heat transfer performance can be achieved.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US15/269,034 2016-07-07 2016-09-19 Multi-pipe three-dimensional plusating heat pipe Abandoned US20180010860A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW105121605 2016-07-07
TW105121605A TW201802425A (zh) 2016-07-07 2016-07-07 多管式立體脈衝式熱管

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US20180010860A1 true US20180010860A1 (en) 2018-01-11

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CN (1) CN107588671A (zh)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11359874B2 (en) * 2020-10-19 2022-06-14 Industrial Technology Research Institute Three dimensional pulsating heat pipe

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CN109084605A (zh) * 2018-08-01 2018-12-25 中国科学技术大学 一种加热段非弯头结构的脉动热管
TWI685638B (zh) 2018-09-14 2020-02-21 財團法人工業技術研究院 立體脈衝式熱管、立體脈衝式熱管組和散熱模組

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CN2636418Y (zh) * 2003-06-16 2004-08-25 中国科学院广州能源研究所 一种脉冲热管式电子元器件散热冷却器
WO2011130313A1 (en) * 2010-04-12 2011-10-20 The Curators Of The University Of Missouri Multiple thermal circuit heat spreader
US9132645B2 (en) * 2012-11-29 2015-09-15 Palo Alto Research Center Incorporated Pulsating heat pipe spreader for ink jet printer
CN103900408A (zh) * 2012-12-27 2014-07-02 陈庆山 一种用于温差发电装置的脉动热管散热器
CN205209308U (zh) * 2015-10-13 2016-05-04 华南理工大学 一种单向循环流动的脉动热管传热系统

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11359874B2 (en) * 2020-10-19 2022-06-14 Industrial Technology Research Institute Three dimensional pulsating heat pipe

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