WO2006059622A1 - 磁性対流熱循環ポンプ - Google Patents

磁性対流熱循環ポンプ Download PDF

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Publication number
WO2006059622A1
WO2006059622A1 PCT/JP2005/021956 JP2005021956W WO2006059622A1 WO 2006059622 A1 WO2006059622 A1 WO 2006059622A1 JP 2005021956 W JP2005021956 W JP 2005021956W WO 2006059622 A1 WO2006059622 A1 WO 2006059622A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
heat
circulation
pump
fluid
Prior art date
Application number
PCT/JP2005/021956
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Shinichi Nakasuga
Hironori Sahara
Kenji Higashi
Original Assignee
Da Vinci Co., Ltd.
The University Of Tokyo
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Da Vinci Co., Ltd., The University Of Tokyo filed Critical Da Vinci Co., Ltd.
Priority to JP2006547961A priority Critical patent/JP4507207B2/ja
Priority to EP05811624A priority patent/EP1832828B1/de
Priority to US11/792,100 priority patent/US20080264068A1/en
Priority to AT05811624T priority patent/ATE523747T1/de
Publication of WO2006059622A1 publication Critical patent/WO2006059622A1/ja

Links

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
    • F28F23/00—Features relating to the use of intermediate heat-exchange materials, e.g. selection of compositions
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/08—Fluid driving means, e.g. pumps, fans

Definitions

  • the present invention relates to an element that transfers thermal energy, and more particularly, to a magnetic convection heat circulation pump that utilizes the magnetic flux density of a magnetic field and the temperature characteristics of a saturated magnetic field of a magnetic material.
  • heat transfer elements using magnetic convection due to the temperature dependence of the saturation magnetization of a magnetic fluid in a magnetic field have been devised for a long time.
  • the non-uniform distribution of the magnetic substance in the dispersion medium and the large remanent magnetism due to the coating accuracy of the surfactant that coats the magnetic substance and the like have hindered magnetic convection and hindered commercialization.
  • the present invention takes a large temperature gradient of the magnetic fluid in the magnetic field by using the magnetic flux density of the magnetic field and the temperature characteristics of the saturation magnetization of the magnetic material without using an electric drive source, and saturates.
  • An object of the present invention is to provide a magnetic convection heat circulation pump capable of efficiently converting to power by causing a difference in magnetic value.
  • magnetic force acts directly by arranging a magnet so as to form a part of a circulation flow path or a circulation flow path that passes through a heat receiving portion.
  • the magnet Provided is a magnetic convection heat circulation pump that takes advantage of the temperature dependence of the saturation magnetization of a magnetic fluid in the magnetic field produced by the temperature gradient caused by the heat input from the heat receiving section, causing continuous magnetic convection of the magnetic fluid.
  • the magnetic convection heat circulation pump of the present invention has a structure that is very structured in that the heat input of the heat receiving portion serves as an operating source, and magnetic fluid causes magnetic convection by the magnetic field to circulate between the heat receiving portion and the heat radiating portion.
  • the operation is continued as long as there is a temperature difference between the heat receiving part and the heat radiating part, and if the temperature difference further widens, the circulation speed increases and a large amount of heat can be easily carried.
  • FIG. 1 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged in a circulation flow path.
  • FIG. 2 is a schematic view illustrating the arrangement of magnets.
  • FIG. 3 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged in a circulation channel.
  • FIG. 4 is a schematic diagram when magnets are arranged in a square shape.
  • FIG. 5 is a schematic diagram when a magnet and a magnetic body are arranged in a U-shape.
  • FIG. 6 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged in a circulation channel.
  • FIG. 7 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged in a circulation channel.
  • FIG. 8 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged on a part of the inner wall surface of the circulation channel.
  • FIG. 9 is a schematic diagram showing a magnetic convection heat circulation pump when a magnet is arranged on a part of the inner wall surface of the circulation channel.
  • FIG. 10 is a perspective view partially seen through a magnetic convection heat circulation pump with a thin pump section.
  • FIG. 11 is a schematic diagram showing the arrangement of magnets when fixed to a yoke.
  • nickel plating or the like is formed in the magnetic field flow path of the magnetic fluid or a part of the inner wall surface of the flow path.
  • a surface-treated magnet is disposed, and a part or all of the inner wall surface of the magnet or the circulation channel is coated with a surfactant of the same type as that of the surfactant coated with the magnetic substance of the magnetic fluid.
  • a magnetic field acts directly on the magnetic fluid, and the flow path resistance is also reduced.
  • the magnetic material an alloy of manganese, zinc, and iron oxide with high saturation magnetism temperature dependence is adopted, and the average particle size of the alloy is about 10 nm, preferably 6 nm, and more preferably.
  • the heat receiving section and the magnetic pump are formed of materials having different thermal conductivities, and a configuration is adopted in which the magnetic field flow paths are mutually shared.
  • a circulation channel (3) that circulates between the heat receiving unit (1) and the heat dissipation unit (2) is arranged, and the magnet N pole is disposed in the circulation channel (3) in parallel with the extending direction.
  • An example in which (4) and S pole (5) are arranged is shown below.
  • the circulation channel (3) is filled with magnetic fluid, and if there is heat input to the heat receiving part (1), the temperature of the magnetic fluid in the heat receiving part (1) rises, and the heat receiving part (1) and the heat radiating part A temperature gradient occurs between the magnetic fluid held in (2) and the magnetic fluid on the heat receiving part (1) side where the magnetic reluctance is reduced is pushed out by the magnetic fluid on the heat radiating part (2) side, An example of magnetic convection causing heat transfer
  • the ferrofluid of the present invention can be used as long as it has a magnetic particle as a magnetic material and is dispersed in an appropriate dispersion medium.
  • the magnetic particles are preferably used as a powder having an average particle size of less than 30 nm, more preferably 1 nm to lOnm.
  • the magnetic substance used in the present invention is particularly preferably an alloy of a divalent transition metal and iron oxide, which is preferably an alloy having a high temperature dependency.
  • the magnetic material is preferably coated (coated) with a surfactant.
  • the surfactant used for coating is preferably a surfactant having an ionic characteristic such as a cationic surfactant or an anionic surfactant. Due to the repulsive force of these surfactants, the magnetic material was uniformly distributed in the dispersion medium. As a result, the residual magnetization can be reduced and the flow path resistance can be greatly reduced.
  • a part of or all of the surface that contacts the magnetic fluid of the circulation channel or the magnet disposed in the circulation channel has the same kind as the ionic characteristics of the surfactant obtained by coating the magnetic material.
  • the temperature dependence of the saturation magnetism of the magnetic material is the same as or younger than lZ2ZnlZ2MnFeO
  • a magnetic ionic liquid can also be used as the magnetic fluid of the present invention.
  • the magnetic ionic liquid is preferably a combination of the typical magnetic anion salt salt of iron and ferric ion and the cation 1-butyl 3-methylimidazole.
  • FIGS. 2 to 4 show the arrangement of the magnets of Examples 1 to 3.
  • Figure 2 shows an example in which a strong magnetic field magnet (4) (5) is placed on the heat-receiving side and a weak magnetic field magnet 2 (4b) (5b) is placed on the heat dissipation side to create a magnetic field gradient.
  • Fig. 3 shows an example in which magnets are arranged in the circulation channel so as to face each other.
  • FIG. 4 shows an example in which the magnets in the circulation channel (3) are arranged in a square shape so that the magnets are narrower on the heat receiving part (1) side. In this way, by creating a strong magnetic field on the heat-receiving part side, the magnetic material having a low temperature and a strong magnetic repulsive force can easily move to a strong magnetic field.
  • FIG. 5 shows an example of a magnet in which a ferromagnetic circuit (10) force, for example, iron or the like is formed into a U-shape and magnets are arranged on opposite surfaces to constitute a magnetic circuit.
  • a ferromagnetic circuit (10) force for example, iron or the like
  • the leakage flux is very
  • FIG. 6 shows a configuration of a magnetic heat pump that forms a plurality of circulation paths and efficiently circulates with a smaller amount of magnetic fluid than the configuration shown in FIG.
  • the magnetic field channel (6) is formed along the magnetic field lines of the magnets (4) and (5) arranged in the heat receiving part (1) in the circulation channel of the first channel (7).
  • it may be arranged in the path of the second channel (8) and the third channel (9), and the magnetic field channel along the magnetic flux on both sides of the magnet (4) (5). (6) may be formed.
  • Example 2 will be described with reference to FIG.
  • the heat receiving part (1) and the heat radiating part (2) are connected by a circulation channel (3). If the heat receiving part (1) and the heat radiating part (2) are made of a flexible material such as a flexible pipe or a resin pipe as the constituent material of the circulation flow path (3), the heat receiving part (1) and the heat radiating part (2) are not limited to a straight arrangement, but are optional. It becomes possible to arrange
  • the magnetic convection heat circulation pump has a configuration in which ring-shaped magnets (4a) and (5a) are arranged in the pipe (12) connecting the heat receiving part (1) and the heat radiating part (2). If such a configuration is adopted, the heat receiving part (1) and the heat radiating part (2) need only be one common part, and the joining part (11) can be easily detached without leakage due to magnetic joining. This is also easy to use when filling magnetic fluid.
  • the method of fixing the magnets arranged in each of the above-described embodiments is not particularly limited.
  • the magnet is fixed so as to be movable by fitting into a guide groove or the like, or fixed and fixed by adhesion or the like. It may be a method to do so.
  • materials with high thermal conductivity such as copper, aluminum, and graphite, as materials for the heat receiving portion (1) and the heat radiating portion (2). More preferably.
  • Example 4 will be described below with reference to Figs.
  • the part constituted by the magnetic field flow path (6) and the magnet (13) is called a magnetic pump (14).
  • a magnetic pump 14
  • FIG. 9 in order to prevent the backflow of the magnetic fluid, the width of the end of the magnetic flow path (6) on the heat receiving part (1) side is gradually reduced, and the magnetic flow path (6 Different heat transfer to share)
  • a magnetic convection heat circulation pump is shown in which a heat receiving part (1) made of a material with conductivity and a magnetic pump (14) are thermally connected.
  • a magnet (13) is installed and formed integrally.
  • the magnetic field flow path (6) and the circulation flow path (3) of the heat receiving part (1) dissipate heat through the connection circulation flow path (3) made of fluorine-based resin, such as PFA.
  • a part of the magnetic field channel (6) is directly input with heat.
  • heat is indirectly transmitted to the magnetic pump (14) and is made of a material having a smaller thermal conductivity than the heat receiving part. Therefore, compared to the heat receiving part (1).
  • the amount of heat transferred is small, resulting in a large temperature gradient in the magnetic field flow path (6), and the magnetic fluid with a high temperature and a low saturation magnetic field value has a high saturation magnetic field value with a low temperature.
  • Circulation is started by being pushed by the magnetic fluid.
  • the magnetic fluid that is not heat input into the magnetic pump (14) flows from the heat radiating section (2) due to the generated pressure, and the temperature difference further increases. As a result, the circulation speed is increased and more heat can be transferred.
  • the magnetizing direction of the magnet (13) is not particularly shown, but it may be either the width direction or the longitudinal direction.
  • the place where the temperature difference occurs is moved to a place where the magnetic field from the heat radiating part (2) of the magnetic pump (14) is strong when the heat input is large.
  • the magnet moves to the vicinity of the center of the magnet (13) having a weak magnetic field, so that a configuration that keeps the temperature of the heating element constant can be realized even if a magnet (13) suitable for the application is used.
  • a part or all of the surface of the circulation flow path in contact with the magnetic fluid may be oil repellent and repellent made by Asahi Glass Co., Ltd., for example. Coat with an oil-repellent coating material such as Cytop, the product name that has aqueous properties, or the same kind of surfactant as the ionic characteristics of magnetic fluid, that is, magnetic fluid is coated with a force thione-based surfactant. In this case, it is preferable to coat with the same cationic surfactant.
  • the magnetic field flow path (6) is shared by the heat receiving section (1) and the magnetic pump (14).
  • the heat receiving part (1) and the magnetic pump (14) have good thermal conductivity! If it is possible to connect them thermally with metal, etc., the magnetic flow path (6) can be shared. good.
  • FIG. 10 shows a configuration in the case where the heat receiving portion (1) and the magnetic pump (14) are made of a material having the same thermal conductivity.
  • FIG. 11 shows an example in which a magnetic circuit is configured.
  • the magnet (13) is arranged so that the north and south poles face each other, and is fixed by a yoke (15).
  • the magnetic field flow path (6) is located between the faces where the N and S poles face each other. The obstruction is obstructed and the pump performance is improved. Furthermore, it is possible to significantly reduce the leakage flux from the magnetic heat pump.
  • the magnetic heat pump of the present invention has a large heat transfer capability per unit area, and can be freely arranged by connecting the heat receiving section and the heat radiating section with a flexible resin pipe. Furthermore, the configuration of the pump unit can be made very small. For this reason, electronic devices are becoming more compact and the power consumption density of electronic components increases. Therefore, it is necessary to transfer heat from a small space to a place where it comes into contact with the outside air to dissipate heat. It can be used for heat transfer and heat dissipation of optical elements such as parts and laser diodes.
  • the magnetic heat pump of the present invention since the magnetic heat pump of the present invention does not use electricity, the heat prevention measures for unmanned facilities, the use of solar heat indoors in cold regions, It can be applied to various uses such as heat transfer during reuse.
  • the magnetic fluid used in the magnetic heat pump of the present invention has low volatility, so that heat transfer is possible even under harsh conditions such as in space, such as in space stations. It can also be used as solar heat recovery means or heat transfer means in an artificial satellite.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Central Heating Systems (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
PCT/JP2005/021956 2004-12-03 2005-11-30 磁性対流熱循環ポンプ WO2006059622A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2006547961A JP4507207B2 (ja) 2004-12-03 2005-11-30 磁性対流熱循環ポンプ
EP05811624A EP1832828B1 (de) 2004-12-03 2005-11-30 Wärmezirkulationspumpe mit magnetischer konvektion
US11/792,100 US20080264068A1 (en) 2004-12-03 2005-11-30 Magnetic Convection Heat Circulation Pump
AT05811624T ATE523747T1 (de) 2004-12-03 2005-11-30 Wärmezirkulationspumpe mit magnetischer konvektion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004-350757 2004-12-03
JP2004350757 2004-12-03

Publications (1)

Publication Number Publication Date
WO2006059622A1 true WO2006059622A1 (ja) 2006-06-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/021956 WO2006059622A1 (ja) 2004-12-03 2005-11-30 磁性対流熱循環ポンプ

Country Status (5)

Country Link
US (1) US20080264068A1 (de)
EP (1) EP1832828B1 (de)
JP (1) JP4507207B2 (de)
AT (1) ATE523747T1 (de)
WO (1) WO2006059622A1 (de)

Cited By (2)

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TWI576557B (zh) * 2014-03-18 2017-04-01 財團法人金屬工業研究發展中心 可變式熱交換器及其製造方法
WO2020208888A1 (ja) * 2019-04-12 2020-10-15 パナソニックＩｐマネジメント株式会社 磁性流体駆動装置および熱輸送システム

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ITBO20050481A1 (it) 2005-07-19 2007-01-20 Silicon Biosystems S R L Metodo ed apparato per la manipolazione e/o l'individuazione di particelle
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ITBO20050646A1 (it) 2005-10-26 2007-04-27 Silicon Biosystem S R L Metodo ed apparato per la caratterizzazione ed il conteggio di particelle
ITTO20060226A1 (it) 2006-03-27 2007-09-28 Silicon Biosystem S P A Metodo ed apparato per il processamento e o l'analisi e o la selezione di particelle, in particolare particelle biologiche
ITTO20070771A1 (it) 2007-10-29 2009-04-30 Silicon Biosystems Spa Metodo e apparato per la identificazione e manipolazione di particelle
IT1391619B1 (it) 2008-11-04 2012-01-11 Silicon Biosystems Spa Metodo per l'individuazione, selezione e analisi di cellule tumorali
US10895575B2 (en) 2008-11-04 2021-01-19 Menarini Silicon Biosystems S.P.A. Method for identification, selection and analysis of tumour cells
DE102008058799B4 (de) * 2008-11-24 2012-04-26 Siemens Aktiengesellschaft Verfahren zum Betrieb eines mehrstufigen Verdichters
US9192943B2 (en) 2009-03-17 2015-11-24 Silicon Biosystems S.P.A. Microfluidic device for isolation of cells
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CN102128436B (zh) * 2011-02-07 2012-07-04 林智勇 磁流体led散热装置
CN102128437B (zh) * 2011-02-07 2012-10-03 林智勇 Led磁流体散热装置
US8503494B2 (en) 2011-04-05 2013-08-06 Microsoft Corporation Thermal management system
ITTO20110990A1 (it) 2011-10-28 2013-04-29 Silicon Biosystems Spa Metodo ed apparato per l'analisi ottica di particelle a basse temperature
ITBO20110766A1 (it) 2011-12-28 2013-06-29 Silicon Biosystems Spa Dispositivi, apparato, kit e metodo per il trattamento di un campione biologico
US20190214173A1 (en) * 2016-08-04 2019-07-11 Nanyang Technological University An apparatus for transferring heat from a heat source to a heat sink
JP6517768B2 (ja) * 2016-10-07 2019-05-22 トヨタ自動車株式会社 磁性流体駆動装置及び磁性流体駆動方法
JP7205970B2 (ja) * 2018-12-27 2023-01-17 川崎重工業株式会社 熱輸送システム及び輸送機

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Publication number Priority date Publication date Assignee Title
TWI576557B (zh) * 2014-03-18 2017-04-01 財團法人金屬工業研究發展中心 可變式熱交換器及其製造方法
WO2020208888A1 (ja) * 2019-04-12 2020-10-15 パナソニックＩｐマネジメント株式会社 磁性流体駆動装置および熱輸送システム

Also Published As

Publication number Publication date
JPWO2006059622A1 (ja) 2008-06-05
EP1832828B1 (de) 2011-09-07
EP1832828A4 (de) 2010-08-04
JP4507207B2 (ja) 2010-07-21
US20080264068A1 (en) 2008-10-30
ATE523747T1 (de) 2011-09-15
EP1832828A1 (de) 2007-09-12

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