SE543441C2 - Heat transfer device - Google Patents

Heat transfer device

Info

Publication number
SE543441C2
SE543441C2 SE1950371A SE1950371A SE543441C2 SE 543441 C2 SE543441 C2 SE 543441C2 SE 1950371 A SE1950371 A SE 1950371A SE 1950371 A SE1950371 A SE 1950371A SE 543441 C2 SE543441 C2 SE 543441C2
Authority
SE
Sweden
Prior art keywords
heat transfer
transfer device
conducting fibers
sheet
thermally conducting
Prior art date
Application number
SE1950371A
Other languages
Swedish (sv)
Other versions
SE1950371A1 (en
Inventor
Jesper Eman
Original Assignee
Centropy Ab
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 Centropy Ab filed Critical Centropy Ab
Priority to SE1950371A priority Critical patent/SE543441C2/en
Priority to PCT/SE2020/050206 priority patent/WO2020197462A1/en
Publication of SE1950371A1 publication Critical patent/SE1950371A1/en
Publication of SE543441C2 publication Critical patent/SE543441C2/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/26—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length in several steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/44—Compression means for making articles of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/465—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating by melting a solid material, e.g. sheets, powders of fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • 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
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/122—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of wires
    • 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
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/086—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning having one or more openings therein forming tubular heat-exchange passages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367—Cooling facilitated by shape of device
    • H01L23/3677—Wire-like or pin-like cooling fins or heat sinks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/34—Feeding the material to the mould or the compression means
    • B29C2043/3483—Feeding the material to the mould or the compression means using band or film carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0027—Cutting off
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • B29C43/28—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0872—Prepregs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement
    • B29K2307/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2507/00—Use of elements other than metals as filler
    • B29K2507/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/18—Heat-exchangers or parts thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/06—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes composite, e.g. polymers with fillers or fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/08—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes pressed; stamped; deep-drawn
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures

Abstract

A heat transfer device (100) comprising at least one body (300, 301, 302, 303, 304, 305) and thermally conducting fibers (2) extending through the at least one body (300, 301, 302, 303, 304, 305) and extending out from the at least one body (300, 301, 302, 303, 304, 305) from at least one surface (300a, 300b, 301a, 301b, 302a, 302b, 303a, 303b, 304a, 304b, 305a, 305b) of the at least one body (300, 301, 302, 303, 304, 305), wherein the thermally conducting fibers (2) have a length of at least 1 mm, wherein the thermally conducting fibers have a conductivity of at least 50 W/mK, wherein the thermally conducting fibers have a diameter of at least 4 micrometers.

Description

HEAT TRANSFER DEVICE Technical field id="p-1"
[0001] The present invention relates generally to a heat transfer device, a heattransfer system and a methods of preparing the same.
Background art id="p-2"
[0002] lt is known to use heat conducting carbon fibers in heat sinks. Such heatsinks typically employs a single body formed of heat conductive metal providing ahigh thermal conductivity. id="p-3"
[0003] A drawback of known solutions is that the metal content of the wallincreases cost of production, and the current manufacturing methods involvescasting or molding around the fibers which is an inefficient method that increasesthe thickness of the wall during production and further limits the available length ofthe fibers and/or requires further manufacturing steps to expose carbon fiber ends.Another drawback of is that the short length of the fibers reduces the efficiencyand thus the transferred heat power.
Summary of invention id="p-4"
[0004] An object of the present invention is to alleviate some of thedisadvantages of the prior art and to provide a heat transfer device, and a heattransfer system which increases heat transfer efficiency. A further object of thepresent invention is to provide a heat transfer device and system which enables ahigh degree of freedom in forming the heat transfer device and system dependingon the indented use. A further object of the present invention is to providemethods of preparing the heat transfer device or system. A further object of thepresent invention is to provide methods of preparing the heat transfer device orsystem that is more efficient than current methods. id="p-5"
[0005] According to invention, a heat transfer device is provided comprising at least one body and thermally conducting fibers extending through the at least one body and extending out from the at least one body from atleast one surface of the at least one body, wherein the thermally conducting fibershave a length of at least 1 mm, wherein the thermally conducting fibers have aconductivity of at least 50 W/mK, wherein the thermally conducting fibers have adiameter of at least 4 micrometers. id="p-6"
[0006] According to one embodiment, the at least one body comprises at least30 wt% non-metallic material(s), preferably at least 70 wt % non-metallicmaterial(s), more preferably at least 90 wt% non-metallic material(s), mostpreferably 100 wt% non-metallic material(s). id="p-7"
[0007] According to one embodiment, the thermally conducting fibers have aconductivity of W/mK, preferably more preferably 800-1000 W/m K. id="p-8"
[0008] According to one embodiment, the thermally conducting fibers extendfrom at least two surfaces of the at least one body. id="p-9"
[0009] According to one embodiment, the thermally conducting fibers comprisesfree ends. id="p-10"
[0010] According to one embodiment, the thermally conducting fibers preferablyhave a diameter of 4-15 micrometers, more preferably 7-10 micrometers. id="p-11"
[0011] According to one embodiment, the at least one body comprises resinand/or thermoplastic materials. id="p-12"
[0012] According to one embodiment, the thermally conducting fibers are carbonfibers. id="p-13"
[0013] According to one embodiment, the at least two surfaces of the at leastone body are opposing surfaces. id="p-14"
[0014] According to one embodiment, the heat transfer device comprises aplurality of bodies, wherein the thermally conducting fibers extend through theplurality of bodies. id="p-15"
[0015] According to one embodiment, the thermally conducting fibers extendingout from each of the plurality of bodies from a top and bottom surface respectively. id="p-16"
[0016] According to one embodiment, the plurality of bodies are positioned substantially equidistant from each other. id="p-17"
[0017] According to one embodiment, the heat transfer device is in the form of a sheet. id="p-18"
[0018] According to one embodiment a heat transfer system is provided,comprising a plurality of heat transfer devices according to any embodiment[0005]-[00017] stacked to each other wherein the at least one body or plurality ofbodies of adjacent heat transfer devices are bonded to each other. id="p-19"
[0019] According to one embodiment, at least a subset of consecutive bodies ofthe plurality of bodies of the two outer heat transfer devices are interconnected by a sealing element extending along a lengthwise direction of the bodies. id="p-20"
[0020] According to one embodiment, the heat transfer system is a heat exchanger. id="p-21"
[0021] Use of the heat transfer device or heat transfer system according to anyembodiment [0005]-[0020], in electronic systems, mechanical systems, computerimplemented systems, chemical systems and/or vehicle systems (including space vehicles). id="p-22"
[0022] According to one embodiment a method of preparing a heat transfer device is provided, comprising the steps of: a. Positioning of thermally conducting fibers directed in mainly onedirection in form of a sheet, wherein the thermally conducting fibers are preferably positioned substantially in parallel to each other, b. Positioning of at least one strip of body material in substantiallyperpendicular direction to said thermally conducting fibers on at least one sidesaid sheet, wherein said body material comprises material or materials which result in said body of the heat transfer device, c. Positioning of said sheet and said at least one strip of body material in a press device, d. Pressing said sheet and said at least one strip against each other by the aid of the press device, e. Administering heat to said sheet and said at least one strip before orinside the press device, wherein the heat turns said strip into a substantiallyviscous material which is forced into said sheet and thereby creating a body forming a seal between two sides of said sheet, andf. Pulling out the resulting heat transfer device out from the press device,[0023] According to one embodiment, the method further comprises:g. And wherein steps a-f are optionally iterated at least once. id="p-24"
[0024] According to one embodiment, a plurality of strips of body material ispositioned on said sheet, and wherein the strips are positioned preferably substantially equidistant from each other. id="p-25"
[0025] According to one embodiment, the thermally conducting fibers are being pulled from a number of large rolls with bundled fibers. id="p-26"
[0026] According to one embodiment, a new part of the sheet having bodymaterial positioned on the sheet is positioned into the press device at the sametime as the resulting heat transfer device is pulled out from the press device.
“MMAccording to one embodiment, a method of preparing a heat transfer system comprising a plurality of heat transfer devices according to än _. _. $ i. a, q. .i __,Sw Q: 5121191; i? any embodiment [0005]-[0017], t ~ = ' " ' [OO22]-[OO,;§ m' i»\\_. š-Efia vvn- ~\~*\.~\ .» ~ ' m-\.: ~\..-\- L: m: ::.=\ hksx. \..~.= 3.: provided, comprising the steps:-Stacking a plurality of heat transfer devices to each other, -Bonding bodies of adjacent heat transfer devices to each other. ^ ' _______________________________ __According to one embodiment, the, method further comprising: -interconnecting at least a subset of consecutive bodies of the two outerheat transfer devices in the stack of heat transfer devices by a sealing element.
Brief describtion of drawinqs gwwThe invention is now described, by way of example, with reference to the accompanying drawings, in which: _______________________________ __Fig. 1 shows a side view of a heat transfer device according to one embodiment of the invention. gmwFig. 2 shows a side view of a heat transfer device according to one embodiment of the invention. gwwFig. 3 shows a side view of a heat transfer device according to one embodiment of the invention. ___________________________ __Fig. 4 shows a side view of a heat transfer device according to one embodiment of the invention.
WWWFig. 5 shows a device for carrying out a method of preparing a heat transfer device according to the invention. gmgFig. 6a-6b shows a device for carrying out a method ofpreparing a heat transfer device along section A-A of Fig. 5. _______________________________ __Fig. 7 shows a method of preparing a heat transfer device according to one embodiment of the invention.
LE ________________________________ “Fig. 8a-8c shows a method of preparing a heat transfersystem, and a heat transfer system according to one embodiment of the invention.
WWWFig. 9a-9b shows a method of preparing a heat transfersystem and a heat transfer system according to one embodiment of the invention.
Fig. 10a-10b shows a perspective view of a heat transfer ~~“\ ............................... ._ system according to one embodiment of the invention. gmgFig. 11a-11d shows a fluid duct comprising a heat transfersystem according to one embodiment of the invention.
Description of embodiments N the following, a detailed description of the invention willbe given. ln the drawing figures, like reference numerals designate identical orcorresponding elements throughout the several figures. lt will be appreciated thatthese figures are for illustration only and are not in any way restricting the scope of the invention. general, a heat transfer device such as a heatexchanger or heat sink comprises a cold side and warm side and a wall toseparate the cold side from the warm side. The heat transfer device is configuredto transfer heat from the warm side to the cold side. On either or both sides of thewall, there may be a fluid medium. ln some cases, heat is transferred from a nonfluid medium such as e.g. mechanical devices. A heat transfer coefficient (HTC)between the fluid and the wall depends on fluid velocity, density etc. Walls shouldbe made thin yet provide sufficient structural integrity. The walls should have a high thermal conductivity. '“ 1 shows a side view of a heat transfer device 100,comprising one body 300 and thermally conducting fibers 2 extending through theat least one body 300 and extending out from the at least one body 300 from onesurface 300a of the at least one body by the portion 2a. According to oneembodiment the thermally conducting fibers 2 and the at least one body forms awall. According to one embodiment, the body 300 comprises a at least one strip30a, 30b of body material as can be further seen in Fig. 5. According to oneembodiment, the strips 30a, 30b are pre-preg strips. According to oneembodiment, the body 300 comprises a first 30a and second 30b strip of bodymaterial. According to one embodiment, the strips 30a, 30b of body materialcomprises material configured to, and with a viscosity that it is sufficient to,impregnate the dry thermally conducting fibers and then become sufficiently stiff tomake handling of the heat transfer device 100, or a basic building block thereof,possible. According to one embodiment, suitable material for the body 300comprises thermosetting resins such as e.g. epoxy, polyester, vinylester,thermoplastic materials. According to one embodiment, the strips 30a, 30b areresin rich strips. According to one embodiment, the body 300 provides a fluid tightseal in a heat transfer device between surfaces 300a, 300b of the body 300.According to one embodiment the strips 30a, 30b may further comprise fibers,particles, metal or other filler material for improving the manufacturing material.According to one embodiment the strips 30a, 30b may consist of such material.According to one embodiment, the at least one body 300 comprises at least 30wt% non-metallic material(s), preferably at least 70 wt % non-metallic material(s),more preferably at least 90 wt% non-metallic material(s), most preferably 100 wt%non-metallic material(s). The benefit of using non-metallic material or materials inthe body 300 above a certain degree is e.g. a lower cost of production. Reducingthe cost of production is beneficial in that it enables large volume production.Using the below described thermally conducting fibers 2 with the parametersdescribed below comprising, their thermal conductivity, the relatively large lengthof the fibers, their small diameter enables the use of a thin, yet to a high degree,metal free, i.e. non-metal body 300. According to one embodiment, side 4 forms a cold side 4, and side 5 forms a warm side 5.
“MMAccording to one embodiment, the thermally conducting fibers 2 have a length of at least 1 mm. According to one embodiment, the lengthis between 1mm and 50 mm. According to one embodiment, the length is between1mm and 500 mm. According to one embodiment, the length of the fibers can beany length based on the intended use. According to one embodiment the ratio ofthe length of the fibers extending out from at least one body from at least onesurface and the length of the fibers extending through the at least one body is at least 1:1. According to one embodiment, the thermally conducting fibers 2 have a conductivity of at least W/mK. According to one embodiment, the thermally conducting fibers have a conductivity of at least morepreferably 800-1000 W/mK.
“WWAccording to one embodiment, the thermally conducting fibers have a small diameter for creating a large surface area. According to oneembodiment, the thermally conducting fibers 2 have a diameter of at least 4micrometers. According to one embodiment, the thermally conducting fibers 2preferably have a diameter of 4-15 micrometers, more preferably 7-10 micrometers. _______________________________ __According to one embodiment, the heat transfer device100 is in the form of a sheet 20. According to one embodiment, the sheet formcomprises a substantially flat form. According to one embodiment, the sheet formcomprises a substantially flat form as seen in one plane. According to oneembodiment, the sheet form comprises a substantially flat form with a relativelylarger extension in two surface directions than in the height direction, hereinreferred to as the sheet surface 20a. According to one embodiment, the sheet 20may take any suitable form in the plane, such as e.g. rectangular, circular etc.depending on the intended use. using longer, as well as a smaller diameter of the thermally conducting fibers 2, the total surface area of the wall may substantiallybe increased. A large surface area increases the efficiency of transferring heat ofthe heat transfer system device. Since the thermally conducting fibers 2 extend through the body and forms the wall, and not by being attached to the body a goodthermal conductivity provided since there are no contact problems between thefibers and the body in the wall. \ ________________________________ __According to one embodiment, the thermally conductingfibers are carbon fibers. According to other embodiments the thermally conductingfibers are at least one of the following: graphite, copper, aluminium, silver, gold,silicon, boron, or any other thermally conducting material in the form of fibers. . u. . gmmAccording to one embodiment, the number of thethermally conducting fibers per square centimeter, such as e.g. seen in the plane as shown in section B-B in Fig. 6b, is in the range of 1-104-1-106fibers per squarecentimeter. According to one embodiment, the thermally conducting fibers 2 are a plurality of thermally conducting fibers 2. >_ _____ _______________________________ __Fig. 2 shows a side view of a heat transfer device 100,wherein the thermally conducting fibers 2 extending out from the at least one body300 from two surfaces 300a, 300b of the at least one body 300 e.g. by the portions2a, 2b respectively. According to this embodiment, the different surfaces 300a,300b, such as the at least two surfaces 300a, 300b, of the at least one body 300 isopposing surfaces 300a, 300b. According to the embodiment, the thermallyconducting fibers 2 have free ends 2c. As such the fibers are configured for beingfree, i.e. have free ends, in the sense that these ends are not connected to anystructure to or from which heat is transferred. According to one embodiment, side4 forms a cold side 4, and side 5 forms a warm side 5. _______________________________ __Fig. 3 shows a side view of a heat transfer device 100comprising two bodies 300, 301, wherein the thermally conducting fibers 2 extendthrough the at least two bodies 300, 301. According to one embodiment, side 4 forms a cold side 4, and side 5 forms a warm side 5. ' 4 shows a side view of a heat transfer device 100 comprising six bodies 300, 301, 302, 303, 304, 305, similar to the body 300 as described above, wherein the thermally conducting fibers 2 extend through the six lO bodies 300, 301, 302, 303, 304, 305. According to one embodiment, the heattransfer device 100 comprising a plurality of bodies 300, 301 N, which may beany suitable number N based on the intended use or application. According to oneembodiment, the heat transfer device 100 comprises an even number of pluralityof bodies 300, 301, 302, 303, 304, 305,..., 2N, wherein the thermally conductingfibers 2 extend through the even number of plurality of bodies 300, 301, 302, 303,304, 305, 2N. According to one embodiment, the thermally conducting fibers 2extending out from each of the plurality of bodies 300, 301, 302, 303, 304, 305from a top and bottom surface 300a, 300b, 301a, 301 b, 302a, 302b, 303a, 303b,304a, 304b, 305a, 305b respectively. to one em bodiment, the bodies 300, 301, 302,303, 304, 305 are positioned substantially equidistant from each other. Accordingto one embodiment, any two consecutive bodies 300, 301 are arranged at asimilar distance from each other as any other two consecutive bodies 301, 302.According to one embodiment the any two consecutive bodies 300, 301 arearranged at a different distance from each other as any other two consecutivebodies 301, 302. g _______________________________ __Fig. 5 shows a device 1000 for carrying out a method ofpreparing a heat transfer device 100 according to one embodiment of theinvention, comprising a press device 500. According to one embodiment, the pressdevice 500 comprises a heating device 550 further comprising at least one heatingdevice element 551, 552 for heating at least one of the surfaces of the pressdevice 500. The press device 500 is configured to generate a pressure F to thefibers 2 and strips 30a, 30b of body material and to force the viscous body materialinto the dry fibers 2. The pressure F can be varied and selected depending onmaterials used for fibers 2 and/or body 300/strips 30a, 30b, thicknesses,temperatures, and other process parameters. The press device 500 may be anypressure generating device, for instance an hydraulic press, comprising asufficiently sized flat contact surfaces 510, 520 to fit the desired width of the sheetof fibers 2, and its dimensions and parameters may be selected to optimize theproduction process and volume. According to one embodiment, the contact ll surface 510 is movable in relation to the contact surface 520. After passing thepress device 500, the heat transfer device 100 formed may be cut in any desiredlength. ______________________________________ “Fig. 6a shows a device 1000 for carrying out a method ofpreparing a heat transfer device 100, as well as a sheet 20 and said at least onestrip 30a, 30b being pressed against each other by the aid of the press device500, along section A-A of Fig. 5. Fig. 6b shows a heat transfer device 100, prepared by the device 1000 along section B-B of Fig. 5.
Fig. 7 shows a method of preparing a heat transfer device 100 comprising the steps of: a. Positioning of thermally conducting fibers 2 directed in mainly onedirection in form of a sheet 20, wherein the thermally conducting fibers 2 arepreferably positioned substantially in parallel to each other, b. Positioning of at least one strip 30a, 30b, 31a, 31 b of body materialin substantially perpendicular direction to said thermally conducting fibers 2 on atleast one side said sheet 20, wherein said body material comprises material ormaterials which result in said body 300 of the heat transfer device 100, c. Positioning of said sheet and said at least one strip 30a, 30b ofbody material in a press device 500, d. Pressing said sheet 20 and said at least one strip 30a, 30b againsteach other by the aid of the press device 500, e. Administering heat to said sheet 20 and said at least one strip 30a,30b before or inside the press device 500, wherein the heat turns said strip 30a,30b into a substantially viscous material which is forced into said sheet 20 andthereby creating a body 300 forming a seal between two sides 4, 5 of said sheet20,and f. Pulling out the resulting heat transfer device 100 out from the pressdevice 500, 12 . .. . “MMAccording to one embodiment, the method further comprises the step: g. And wherein steps a-f are optionally iterated at least once. gwwAccording to one embodiment, the heat transfer device iscut in a desired length, with a desired number of bodies. According to oneembodiment the cut is carried out across the fibers 2. According to oneembodiment, the cut is carried out along the bodies.
.¿ A\§ få: i ....................................... ._ _ g According to one embodiment of the method of preparingthe heat transfer device, at least a plurality of strips of body material is positionedon said sheet 20, and wherein the strips 30a, 30b and 31a, 31 b of body materialare positioned at a distance from each other on the sheet 20. According to oneembodiment, the strips of body material comprises upper strips 30a, 31 apositioned on one (upper) side of the fibers 2 and lower strips 31a, 31 b positionedat a corresponding position, respectively, on the other (lower) side of the fibers 2. “wwwAccording to one embodiment, the strips 30a, 30b and t* -wk V \\ ->§\:-*\:v\ 31a, 31 b of body material are positioned substantially equidistant from each other.
By positioning the strips either substantially equidistant from each other, or, eachstrip being placed at a predefined distance from another strip enables themanufacturing of similar heat transfer devices 100. Such heat transfer devicesmay be stacked together and used for forming a heat transfer system as shall befurther described in Fig. 8a-8c, 9a-9b. wçw _ ________________________________ __According to one embodiment of the method of preparing the heat transfer device 100, the thermally conducting fibers 2 are being pulledfrom a number of large rolls 200 with bundled fibers 2. n-“i _______________________________ __According to one embodiment of the method of preparing the heat transfer device 100, a new part of the sheet 20 having body materialpositioned on the sheet 200 is positioned into the press device 500 at the sametime as the resulting heat transfer device 100 is pulled out from the press device500. 13 v N _.\ .\\ H>§Å:~*ï:5“\. _ gmwAccording to one embodiment, the amount of fibers 2 are adjusted for optimizing the flow of fluid during use vs the pressure loss, depending on the intended use. ________________________________ __According to one embodiment, the above described method of preparing the heat transfer device 100 enables the possibility tomanufacture continuously in an automated and highly efficient process. _ _______________________________ __Fig. 8a shows a method of stacking a plurality of heat transfer devices 100, according to Fig. 3 into a heat transfer system 1 as seen inFig. 8b by applying a pressure F on the sheet surface 20a. According to oneembodiment heat is provided in the process of stacking the heat transfer devices100. Thus, the heat transfer devices 100, in Fig. 8a are shown to extend in a depthdirection by the dotted lines. By the dotted lines, the length or depth of the sheets20 or the heat transfer devices 100, may be selected to any length depending theintended use. Thus, the heat transfer system 1 of Fig. 8b comprises a plurality ofheat transfer devices 100 stacked to each other wherein the bodies 300, 301, 302,303, 304, 305 of adjacent heat transfer devices 100, respectively, are bonded toeach other by applying a pressure F and, optionally, heat, and optionally anadhesive. According to one embodiment, this process is carried out in a pressdevice 500 as described above. According to one embodiment, the heat transfersystem 1 comprises two outer heat transfer devices 100, in the stack of heattransfer devices 100, wherein succeeding, or consecutive bodies of each of theouter heat transfer devices 100, 150 are interconnected by a sealing element 400extending along a lengthwise direction of the bodies 300; 301. This forms achannel 5 sealed from the outside by the body material and the sealing element400. The heat transfer system 1 formed in Fig. 8b comprises a side 4, such as e.g.a cold side 4, and a side 5, such as a warm side 5 being formed by the channel 5. gwmFig 8c shows an alternative embodiment, as compared to that of Fig. 8b, wherein at least some fibers, or part of fibers, have been removedon the warm side 5 to reduce pressure loss, and/or increase fluid velocity and/orincrease fluid flow, which e.g. improves heat transfer coefficient between the fluid 14 and body material. According to one embodiment at least some fibers, or part offibers, may alternatively be removed on the cold side 4. According to oneembodiment, channels 50 are formed in the warm side 5 extending length wisealong the length of the heat transfer system 1. According to one embodiment, suchheat transfer system 1 as described in Fig. 8b, 8c may be used for a gas-liquidheat transfer system, wherein cold gas flows on the cold side 4, and hot liquidflows on the warm side 5. The embodiment of Fig. 8b may be used for anintercooler, e.g. in a gas-gas heat transfer system 1. The embodiment of Fig. 8cmay be used for radiators. Such heat transfer system 1 may e.g. be used forradiators. 9a, shows a method of stacking a plurality of heattransfer devices 100 according to Fig. 4 into a heat transfer system 1 as seen inFig. 9b by applying a pressure F on the sheet surface 20a. Thus, compared to themethod described herein is similar to the method described in Fig. 8a, however theheat transfer devices 100 comprise a plurality of bodies such as e.g. six bodies300, 301, 302, 303, 304, 305. According to one embodiment, at least a subset ofconsecutive or succeeding bodies of the plurality of bodies 300, 301, 302, 303,304, 305 of the two outer heat transfer devices 100 are interconnected by asealing element 400 extending along a lengthwise direction of the bodies 300;301302, 303, 304, 305. According to one embodiment, at least a subset of thebodies of the two outer heat transfer devices 100, form pair of bodies 300, 301;302, 303; 304, 305; wherein each of the pair of bodies 300, 301; 302, 303; 304,305 of two outer heat transfer system devices 100, in the stack of heat transferdevices 100, are interconnected by a sealing element 400 extending along alengthwise direction of the bodies 300; 301302, 303, 304, 305. According to oneembodiment, the pair of bodies are formed of succeeding or consecutive bodies.According to one embodiment, an entire sheet 4000 (not shown) of the sealingelement 400 covers the entire surface portion 20a of the heat transfer device 100.According to one embodiment, the heat transfer devices 100 comprise an evennumber of plurality of bodies, wherein the even number of plurality of bodies 300,301 form pair of bodies 300; 301, wherein each of the pair of bodies 300; 301, oftwo outer heat transfer system devices 100, in the stack of heat transfer devices 100, are interconnected by a sealing element 400 extending along a Iengthwisedirection of the bodies 300; 301). The heat transfer system 1 formed in Fig. 9b andresulting from the method of Fig. 9a, comprises a side 4, such as e.g. a cold side4, and a side 5, such as a warm side 5 being formed by the channel 5. As seen inFig. 9b according to one embodiment, the heat transfer system 1 forms a pluralityof cold sides 4 and warm sides 5. Any number of bodies 300 may be used in aheat transfer system 1 according to the described embodiment. _____________________________________ __Following a similar procedure as in Fig. 8a, 9a, by using aheat transfer device 100 according to Fig. 1 results in a heat transfer system 1, ascan be seen in Fig. 10a, further disclosing a cold side 4, and a warm side 5.According to one embodiment, the heat transfer system 1 may e.g. be used forCPU heat sinks, e.g. in a fluid-contact heat transfer system 1. Fig. 1 disclosesfibers 2 extending from one surface 300a of the at least one body, i.e. the coldside 4. The opposite warm side 5 may be directly adjoined by the CPU, whereinthe CPU contacts a cross-section of the fibers 2. Such structure is preferable inapplications where heat is transferred from a warm object instead of between twofluids, e.g. from a CPU to ambient air. According to one embodiment the application may also be used where space is very limited.
\ »MNThe heat transfer system 1 according to Fig. 10a mayalternatively be formed by using the heat transfer device of Fig. 2 and applying acut at the middle of the body 300 and along the length of the body 300. _______________________________ __Yet another embodiment, can be seen in Fig. 10b,wherein a similar procedure is as in Fig. 8a, 9a, 10a is applied, by using a heattransfer device of Fig. 3 and applying a cut at the middle of the bodies 300, 301and along the length of the body 300, 301. Herein, fibers are held in place by anupper and lower body, ensuring that they do not fold when a cooling fluid is forcedthrough the fibers. Thus, according to one embodiment, the body provide structural integrity to the heat transfer system 1. mmgFig. 11a shows a fluid duct 600 for directing a cooling fluid through fibers 2 of a cold side 4 of a heat transfer device 1. According to one ló embodiment, the heat transfer device 1 is a heat transfer device 1 according toFig. 10a. Cooling fluid flows through or enters the elongated duct at a portion 610,flows via a connecting portion 620 configured to comprise the heat transfer device1 and further comprises a duct opening 630 for enabling the cooling fluid to exitthe fluid duct 600 after heat has been transferred to the cold side 4 from the warmside 5 via the fibers 2, e.g via a CPU bearing against the end of the fibers 2 on thewarm side 5. According to one embodiment, the connecting portion 620 has awedge shape, such as e.g. a pyramidal shape of an increased cross -section areain the cooling fluid flow direction towards the duct opening 630, with the basecomprising the heat transfer device 1. According to one embodiment, thepyramidal shape enables a high fluid velocity through the fluid duct 600, throughthe narrower portion 610 and further through the heat transfer device, whichincreases the heat transfer coefficient, but still enables the fitting of the heattransfer device 1, which requires a certain, larger space to comprise a sufficientnumber of fibers 2 and surface area to provide a sufficient heat transfer efficiency.Fig. 11b shows an exploded side view of the fluid duct 600 according to Fig. 11a.Fig. 11c shows a side view, such as a front view, of the fluid duct 600 according toFig.11a and 11b and the duct opening 630. Fig 11d shows a side view, such as arear view, of the fluid duct 600 according to Fig.11a-11c, lacking the duct opening630.
According to one embodiment, the sealing element 400is formed by the same material as the body material or materials. According to oneembodiment, the sealing element 400 material is selected among the materials described herein for the body material. .w “r g \ _______________________________ __A preferred embodiment of a heat transfer device 100 orheat transfer system 1, use of a heat transfer device 100 or heat transfer system1, a method of preparing a heat transfer device 1 or heat transfer system 100according to the invention has been described. However, the person skilled in theart realizes that this can be varied within the scope of the appended claims withoutdeparting from the inventive idea. 17 »MMAccording to one embodiment, the heat transfer system isa heat exchanger. According to one embodiment, heat transfer devices andsystems described are used in electronic systems, mechanical systems, computerimplemented systems, chemical systems and/or vehicle systems (including spacevehicles). According to one embodiment, heat transfer devices and systemsdescribed are configured to be used in electronic systems, mechanical systems,computer implemented systems, chemical systems and/or vehicle systems(including space vehicles).
»MMNAII the described alternative embodiments above or partsof an embodiment can be freely combined without departing from the inventiveidea as long as the combination is not contradictory.

Claims (23)

1. A heat transfer device (100) comprising at least one body (300, 301,302, 303, 304, 305) and thermally conducting fibers (2) extending through the atleast one body (300, 301, 302, 303, 304, 305) and extending out from the at leastone body (300, 301, 302, 303, 304, 305) from at least one surface (300a, 300b,301a, 301b, 302a, 302b, 303a, 303b, 304a, 304b, 305a, 305b) of the at least onebody (300, 301, 302, 303, 304, 305), conducting fibers (2) have a length of at least 1 mm, wherein the thermally :. v. _.,\.._~'. .t ;.m the thermally conducting fibers jg-ïfgghave a conductivity of at least 50 W/mK, wherein thethermally conducting fibers ;;:_§§;=__have a diameter of at least 4 micrometers, whereinthe thermally conducting fibers (2) are positioned and directed in mainly onedirection in the form of a sheet (20), wherein the thermally conducting fibers (2)are preferably positioned substantially in parallel to each other, wherein the _ ~“ 'gggwfibers (2) are directed along a surface direction of a sheetsurface (20a) of the sheet (20).
2. The heat transfer device (100) according to claim 1, wherein the at leastone body (300, 301, 302, 303, 304, 305) comprises at least 30 wt% non-metallicmaterial(s), preferably at least 70 wt % non-metallic material(s), more preferably atleast 90 wt% non-metallic material(s), most preferably 100 wt% non-metallicmaterial(s).
3. The heat transfer device (100) according any of the preceding claims,wherein the thermally conducting fibers (2) have a conductivity of 50-1000 W/mK,preferably 300-1000, more preferably 800-1000 W/mK.
4. The heat transfer device (100) according to any of the preceding claims,wherein the thermally conducting fibers (2) extend from at least two surfaces(300a, 300b) of the at least one body (300).
5. The heat transfer device (100) according to any of the preceding claims,wherein the thermally conducting fibers (2) comprises free ends (2c).
6. The heat transfer device (100) according to any of the preceding claims,wherein the thermally conducting fibers (2) preferably have a diameter of 4-15 micrometers, more preferably 7-10 micrometers.
7. The heat transfer device (100) according to any one of the precedingclaims, wherein the at least one body (300, 301, 302, 303, 304, 305) comprisesresin and/or thermopiastic materials.
8. The heat transfer device (100) according to any of the preceding claims, wherein the thermally conducting fibers (2) are carbon fibers.
9. The heat transfer device (100) according to any of the preceding claims4-8, wherein the at least two surfaces (300a, 300b) of the at least one body (300,301, 302, 303, 304, 305) are opposing surfaces (300a, 300b).
10. The heat transfer device (100) according to any of the preceding claims,wherein the heat transfer device (100) comprises a plurality of bodies (300, 301,302, 303, 304, 305), wherein the thermally conducting fibers (2) extend throughthe plurality of bodies (300,
11. The heat transfer device (100), according to claim 10, wherein thethermally conducting fibers (2) are extending out from each of the plurality ofbodies (300, 301, 302, 303, 304, 305) from a top and bottom surface (300a, 300b,301a, 301 b, 302a, 302b, 303a, 303b, 304a, 304b, 305a, 305b) respectively.
12. The heat transfer device (100), according to any of the preceding claims10-11, wherein the plurality of bodies (300, 301, 302, 303, 304, 305) arepositioned substantially equidistant from each other.
13. The heat transfer device (100) according to any of the preceding claims,wherein the heat transfer device (100) is in the form of a sheet (20).
14. Heat transfer system (1) ___à;3¿.-j__comprising a plurality of heattransfer devices (100) according to any of the preceding claims 1-13, stacked toeach other wherein the at least one body or plurality of bodies (300, 301, 302, 303,304, 305) of adjacent heat transfer devices (100) are bonded to each other.
15. The heat transfer system (1) according to claim 14, wherein at least asubset of consecutive bodies of the plurality bodies (300, 301, 302, 303, 304, 305)of two outer heat transfer devices (100), in the stack of heat transfer devices (100)are interconnected by a sealing element (400) extending along a lengthwisedirection of the bodies (300; 301, 302, 303, 304, 305).
16. Heat transfer system (1) according to any one of the previous precedingclaims 14-15, wherein the heat transfer system (1) is a heat exchanger.
17. Use of the heat transfer device (100) or heat transfer system (1)according to any one of the preceding claims in electronic systems, mechanicalsystems, computer implemented systems, chemical systems and/or vehiclesystems (including space vehicles).
18. Method of preparing a heat transfer device (100) according to any one of the preceding claims 1-1 comprising the steps of: a. Positioning of thermally conducting fibers (2) directed in mainly onedirection in form of a sheet (20), wherein the thermally conducting fibers (2) are preferably positioned substantially in parallel to each other, b. Positioning of at least one strip (30a, 30b, 31a, 31 b) of bodymaterial in substantially perpendicular direction to said thermally conducting fibers(2) on at least one side said sheet (20), wherein said body material comprisesmaterial or materials which result in said body (300) of the heat transfer device(100), c. Positioning of said sheet and said at least one strip (30a, 30b) ofbody material in a press device (500), d. Pressing said sheet 20 and said at least one strip (30a, 30b)against each other by the aid of the press device (500), e. Administering heat to said sheet (20) and said at least one strip(30a, 30b) before or inside the press device (500), wherein the heat turns saidstrip (30a, 30b) into a substantially viscous material which is forced into said sheet (20) and thereby creating a body (300) forming a seal between two sides (4, 5) ofsaid sheet (20), and f. Pulling out the resulting heat transfer device (100) out from the press device (500),
19. Method according to claim 18, wherein a plurality of strips (30a, 31a;30b, 31 b) of body material is positioned on said sheet (20), and wherein the strips(30b, 31 b), are positioned preferably substantially equidistant from each other.
20. Method according to any of the preceding c|aims 18-19, wherein thethermally conducting fibers are being pulled from a number of large rolls (200) withbund|ed fibers (2).
21. Method according to any of the preceding claims__18-20, wherein a newpart of the sheet (20) having body material positioned on the sheet (20) ispositioned into the press device (500) at the same time as the resulting heattransfer device (100) is pulled out from the press device (500). gmmMethod of preparing a heat transfer system (1), comprising a plurality of heat transfer devices (100) according to any of the preceding c|aims 1-13, or comprising a plurality of heat transfer devices (100) prepared by the method according to c|aims comprising the steps:- Stacking a plurality of heat transfer devices (100) to each other, - Bonding bodies (300, 301, 302, 303, 304, 305) of adjacent heattransfer devices (100) to each other. _.\ .w Method according to claim further comprising: -interconnecting at least a subset of consecutive bodies (300, 301, 302, 303, 304,305) of the two outer heat transfer devices 100 in the stack of heat transferdevices 100 by a sealing element (400).
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