EP1544563B1 - Verbessertes Wärmerohr mit Rinnen mit kleinem Scheitelpunkt - Google Patents

Verbessertes Wärmerohr mit Rinnen mit kleinem Scheitelpunkt Download PDF

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Publication number
EP1544563B1
EP1544563B1 EP04027134A EP04027134A EP1544563B1 EP 1544563 B1 EP1544563 B1 EP 1544563B1 EP 04027134 A EP04027134 A EP 04027134A EP 04027134 A EP04027134 A EP 04027134A EP 1544563 B1 EP1544563 B1 EP 1544563B1
Authority
EP
European Patent Office
Prior art keywords
groove
heat pipe
fins
width
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP04027134A
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English (en)
French (fr)
Other versions
EP1544563A1 (de
Inventor
Donald L. Bennett
Liangyou Tang
Edward G. Rottman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Outokumpu Oyj
Original Assignee
Outokumpu Oyj
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Publication date
Application filed by Outokumpu Oyj filed Critical Outokumpu Oyj
Publication of EP1544563A1 publication Critical patent/EP1544563A1/de
Application granted granted Critical
Publication of EP1544563B1 publication Critical patent/EP1544563B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
    • F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure

Definitions

  • the present invention relates to internally enhanced tubes for improved heat transfer and specifically to a heat transfer tube with inner grooves having a groove top opening that is smaller than the largest opening in the groove.
  • Heat pipes are typically used in heat exchangers for air conditioning and refrigeration and for thermal management of electronics devices such as computer CPU's.
  • a heat pipe is a tube, which is sealed at both ends and provided with a limited quantity of refrigerant.
  • One end of the tube is exposed to a heat source, where the liquid inside the tube is heated so that the liquid is evaporated.
  • the vapor flows to the opposite end of the tube, which is exposed to a heat sink.
  • the vapor releases its heat to the heat sink and condenses back to liquid form.
  • the liquid will then flow back to the end where the heat source is located to be evaporated.
  • a wick structure In order to draw liquid from the heat sink end back to the heat source end, a wick structure is required, which has a capillary effect.
  • the capillary effect functions as a pump to move liquid from the heat sink end to the heat source end.
  • the inner groove structure In current heat pipes, the inner groove structure has been used as the wick of a heat pipe.
  • the current inner groove structures expose the liquid flow to the vapor flow in the center of the heat pipe and in the opposite flow direction to the liquid flow. The vapor flow entrains liquid droplets and carries these droplets away from the liquid stream. This entrainment of the liquid droplets into the vapor flow has a detrimental effect on the performance of the heat pipe.
  • the present invention meets the above-described need by providing an internally enhanced tube as claimed in claim 1.
  • the present invention reduces the entrainment effect described above by shielding the liquid flow from the vapor flow. Due to the narrower groove opening at the top, the vapor flow in the center of the tube is partially separated from the liquid flow inside the groove. Accordingly, the liquid droplets are more difficult to be carried away by the vapor flow traveling in the opposite direction. Due to this shielding effect, the entrainment effect is reduced so that more liquid can reach the heat source end of the heat pipe and therefore the total heat transfer can be increased.
  • the groove geometry is defined by a plurality of trapezoidal-shaped fins.
  • the groove geometry is defined by a plurality of T-shaped fins.
  • the groove geometry is defined by a plurality of mushroom-shaped fins.
  • the groove opening is smaller than the groove bottom.
  • the groove cross-sectional area is equal to or larger than the cross-sectional area of the fins that form the grooves.
  • the height of the grooves is larger than the width of the grooves.
  • a section 10 of heat pipe 13 is shown.
  • the pipe 13 may be constructed of copper, copper alloy, or other heat conductive materials.
  • the pipe 13 is shown in a partial view that does not show the overall profile of the pipe.
  • the enhancement of the present invention may be provided for pipe having many cross-sectional shapes including, but not limited to, round, oval, square, rectangular, etc.
  • the longitudinal axis of the pipe 13 is oriented normal to the page.
  • the heat pipe 13 has an outer wall 16 and an internally enhanced inner wall 19.
  • the heat pipe 13 has a wall thickness 22 measured from the bottom surface 24 of the groove 25 to the outer wall 16.
  • the groove 25 has an opening 29 at the top with respect to the orientation of Fig. 1.
  • grooves 25 are formed by trapezoidal shaped fins 26 that result in grooves 25 having a bottom surface 24 and opposed angled walls 31 and 34.
  • the walls 31 and 34 angle inward toward each other.
  • the width 39 at the bottom of the groove 25 is larger than the width 42 of opening 29 at the top of groove 25.
  • the cross-sectional area of the groove 25 is equal to or larger than the cross-sectional area of the fins 26 that form the grooves 25.
  • the height 70 of the grooves 25 is equal to or larger than the width 39 of the grooves 25.
  • the heat pipe 13 of the present invention also has the following properties.
  • the groove height 70 is between 0.05 mm to 5 mm.
  • the groove opening 29 is 0.05 mm to 5 mm in length, and the groove pitch is 0.10 to 5 mm.
  • the ratio of groove cross-sectional area to groove height is 0.02 mm to 1 mm.
  • the ratio of groove cross-sectional area to groove wall length is 0.01 mm to 1 mm.
  • the ratio of groove opening to the largest width of the groove is 0.01 to 0.99.
  • an alternate embodiment for a heat pipe 99 of the present invention includes a set of grooves 100 formed between T-shaped fins 103.
  • the heat pipe 99 has an outer surface 106.
  • the longitudinal axis of the pipe is oriented normal to the page with respect to Fig. 2.
  • the pipe 99 has a wall thickness 109 measured between the bottom surface 112 of the groove 100 and the outer surface 106.
  • the groove 100 is formed in part by opposed walls 115, 118.
  • the outer end 113 of the T-shaped fins 103 defines an opening 121.
  • the opening 121 has a width 124.
  • the width 124 is smaller than the width 127 along the bottom surface 112.
  • the cross-sectional area of the groove 100 is equal to or larger than the cross-sectional area of the fins 103.
  • the height 150 of the groove 100 is larger than the width 127.
  • Heat pipe 200 has a plurality of fins 203 having a mushroom-shaped profile.
  • a plurality of grooves 201 is formed between the fins 203.
  • Heat pipe 200 has an outer surface 206.
  • the longitudinal axis of the pipe is oriented normal to the page with respect to Fig. 2.
  • the pipe 200 has a wall thickness 209 measured between the bottom surface 212 of the groove 201 and the outer surface 206.
  • the groove 201 is formed in part by opposed walls 215, 218.
  • the ends 213 of adjacent fins 203 define an opening 221.
  • the opening 221 has a width 224 that is smaller than the width 227 along bottom surface 212.
  • the cross-sectional area of the groove 201 is equal to or larger than the cross-sectional area of the fins 203.
  • the height 250 of the groove 201 is larger than the width 127.
  • Heat pipe 300 has a plurality of fins 303 forming grooves 306 between adjacent fins 303. As shown, the bottom of groove 306 is round. Other shapes for the bottom wall may also be suitable including flat and other non-round shapes.
  • the longitudinal axis of the pipe is oriented perpendicular to the page.
  • the opening 309 at the top of the groove 306 is smaller than the largest width 312 of the groove 306.
  • the largest width 312 is located in a midportion of groove 306.
  • angled fins 400 provide triangular shaped grooves 403.
  • the top of the grooves 403 have an opening 406 with a width 409 that is smaller than the largest width of the grooves 403.
  • the largest width for the groove 403 is located at the bottom wall 412.
  • Y-shaped fins 500 provide grooves 503 located therebetween.
  • the width of the opening 506 at the top of the groove 503 is smaller than the widest opening 512 of the groove 503.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geometry (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Curtains And Furnishings For Windows Or Doors (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (16)

  1. Wärmerohr, aufweisend ein rohrförmiges Element (13, 99, 200, 300) mit einer inneren Oberfläche (19), die einen Innendurchmesser definiert und sich entlang einer Längsachse erstreckt, wobei eine Mehrzahl an Rippen (26, 103, 203, 303, 400, 500) vorgesehen ist, wobei jede Rippe Seitenwände sowie eine obere Wand aufweist,
    - wobei die Rippen (26, 103, 203, 303, 400, 500) auf der inneren Oberfläche (19) des rohrförmigen Elements angeordnet sind, um so eine Nut (25, 100, 201, 306, 403, 503) zwischen benachbarten Rippen zu definieren,
    - wobei die Nut (25, 100, 201, 306, 403, 503) oben eine Öffnung (29, 121, 221, 309, 406, 506) hat, sowie einen Nutboden (24, 112, 212, 412) entlang der Innenfläche (19) des rohrförmigen Elements,
    - und die Nut (25, 100, 201, 306, 403, 503) Seiten (31, 34; 115, 118; 215, 218) hat, die durch die Seitenwände der Rippen (26, 103, 203, 303, 400, 500) definiert sind, wobei die Breite (39, 127, 227, 312) der Nut (25, 100, 201, 306, 403, 503) an ihrem breitesten Bereich größer ist als die Breite (42, 124, 224) der Nutöffnung (29, 121, 221, 309, 406, 506),
    dadurch gekennzeichnet, dass die Höhe der Nut größer ist als die Breite der Nut.
  2. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass der Querschnittsbereich der Nut (25, 100, 201, 306, 403, 503) größer ist als der Querschnittsbereich der Rippen (26, 103, 203, 303, 400, 500).
  3. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Rippen (26) eine Trapezform haben.
  4. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Rippen (103) T-förmig sind.
  5. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Rippen (203) eine Pilzform haben.
  6. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Rippen (500) Y-förmig sind.
  7. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Rippen (400) zueinander winklig angeordnet sind, um so eine dreiecksförmige Nut (403) zu bilden.
  8. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass der Nutboden gekrümmt ist.
  9. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass der Nutboden rund ist.
  10. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Nuthöhe 0,05 mm bis 5 mm beträgt.
  11. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Breite der Nutöffnung 0,05 mm bis 5 mm beträgt.
  12. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Nuttiefe 0,10 mm bis 5 mm beträgt.
  13. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass das Verhältnis des Querschnittsbereichs der Nut zur Nuthöhe 0,02 bis 1 beträgt.
  14. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass das Verhältnis des Querschnittsbereichs der Nut zur Länge der Nutwand 0,01 bis 1 beträgt.
  15. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass das Verhältnis der Nutöffnung zur größten Breite der Nut 0,01 bis 0,99 ist.
  16. Wärmerohr nach Anspruch 1,
    dadurch gekennzeichnet, dass die Breite der Nut am Nutboden größer ist als die Breite der Nutöffnung.
EP04027134A 2003-12-16 2004-11-15 Verbessertes Wärmerohr mit Rinnen mit kleinem Scheitelpunkt Not-in-force EP1544563B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US737083 2003-12-16
US10/737,083 US20050126757A1 (en) 2003-12-16 2003-12-16 Internally enhanced tube with smaller groove top

Publications (2)

Publication Number Publication Date
EP1544563A1 EP1544563A1 (de) 2005-06-22
EP1544563B1 true EP1544563B1 (de) 2007-08-08

Family

ID=34523140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04027134A Not-in-force EP1544563B1 (de) 2003-12-16 2004-11-15 Verbessertes Wärmerohr mit Rinnen mit kleinem Scheitelpunkt

Country Status (7)

Country Link
US (1) US20050126757A1 (de)
EP (1) EP1544563B1 (de)
JP (1) JP2005180907A (de)
CN (1) CN1629594A (de)
AT (1) ATE369535T1 (de)
DE (1) DE602004008020D1 (de)
TW (1) TW200528676A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216615A2 (de) 2009-02-04 2010-08-11 Wieland-Werke AG Wärmeübertragerrohr und Verfahren zu dessen Herstellung

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CN100529642C (zh) * 2006-10-13 2009-08-19 富准精密工业(深圳)有限公司 热管及其制造方法
DE102007038909B4 (de) 2007-08-17 2021-07-15 Osram Gmbh Wärmeleitrohr und Anordnung mit Wärmeleitrohr
US9163883B2 (en) 2009-03-06 2015-10-20 Kevlin Thermal Technologies, Inc. Flexible thermal ground plane and manufacturing the same
US20100294467A1 (en) * 2009-05-22 2010-11-25 General Electric Company High performance heat transfer device, methods of manufacture thereof and articles comprising the same
US20100294475A1 (en) * 2009-05-22 2010-11-25 General Electric Company High performance heat transfer device, methods of manufacture thereof and articles comprising the same
JP5552888B2 (ja) * 2009-10-30 2014-07-16 セイコーエプソン株式会社 偏光素子、偏光素子の製造方法、液晶装置および電子機器
CN101776409B (zh) * 2010-02-01 2011-07-20 黄晓峰 一种塑料热管的加工方法
EP2420588A1 (de) * 2010-08-16 2012-02-22 Applied Materials, Inc. Wärmeverwaltung von Beschichtungsverfahren
WO2013046482A1 (ja) * 2011-09-26 2013-04-04 三菱電機株式会社 熱交換器及びその熱交換器を用いた冷凍サイクル装置
CN102538530A (zh) * 2012-01-12 2012-07-04 昆山德泰新材料科技有限公司 沟槽式热导管
US9618275B1 (en) * 2012-05-03 2017-04-11 Advanced Cooling Technologies, Inc. Hybrid heat pipe
EP3194113B1 (de) 2014-09-17 2022-06-08 The Regents Of The University Of Colorado, A Body Corporate, A Colorado Non-Profit Wärmegrundebene auf basis von mikrosäulen
US11598594B2 (en) 2014-09-17 2023-03-07 The Regents Of The University Of Colorado Micropillar-enabled thermal ground plane
US11988453B2 (en) 2014-09-17 2024-05-21 Kelvin Thermal Technologies, Inc. Thermal management planes
CN104792206A (zh) * 2015-04-24 2015-07-22 江劲松 具有异形槽道的板式热管
KR20180022420A (ko) * 2016-08-24 2018-03-06 현대자동차주식회사 열교환튜브
WO2018089432A1 (en) * 2016-11-08 2018-05-17 Kelvin Thermal Technologies, Inc. Method and device for spreading high heat fluxes in thermal ground planes
US10584923B2 (en) * 2017-12-07 2020-03-10 General Electric Company Systems and methods for heat exchanger tubes having internal flow features
US20190353431A1 (en) * 2018-05-18 2019-11-21 Microsoft Technology Licensing, Llc Two-phase thermodynamic system having compensational wick geometry to enhance fluid flow
CN109213298A (zh) * 2018-10-10 2019-01-15 郑州云海信息技术有限公司 一种用于服务器的虹吸管散热器
JP7517672B2 (ja) * 2019-12-20 2024-07-17 国立大学法人東海国立大学機構 装置、熱交換器、および蒸発器
JP7458243B2 (ja) * 2020-06-04 2024-03-29 古河電気工業株式会社 熱輸送デバイス
US20230292466A1 (en) 2020-06-19 2023-09-14 Kelvin Thermal Technologies, Inc. Folding Thermal Ground Plane
US20210136956A1 (en) * 2020-12-18 2021-05-06 Intel Corporation Heat pipe for improved thermal performance at cold plate interface

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2216615A2 (de) 2009-02-04 2010-08-11 Wieland-Werke AG Wärmeübertragerrohr und Verfahren zu dessen Herstellung
DE102009007446A1 (de) 2009-02-04 2010-08-12 Wieland-Werke Ag Wärmeübertragerrohr und Verfahren zu dessen Herstellung
DE102009007446B4 (de) * 2009-02-04 2012-03-29 Wieland-Werke Ag Wärmeübertragerrohr und Verfahren zu dessen Herstellung
EP2216615A3 (de) * 2009-02-04 2013-12-04 Wieland-Werke AG Wärmeübertragerrohr und Verfahren zu dessen Herstellung
US8899308B2 (en) 2009-02-04 2014-12-02 Wieland-Werke Ag Heat exchanger tube and method for producing it

Also Published As

Publication number Publication date
TW200528676A (en) 2005-09-01
US20050126757A1 (en) 2005-06-16
JP2005180907A (ja) 2005-07-07
ATE369535T1 (de) 2007-08-15
CN1629594A (zh) 2005-06-22
DE602004008020D1 (de) 2007-09-20
EP1544563A1 (de) 2005-06-22

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