EP3143357A1 - Dispositif d'échange de chaleur et son utilisation - Google Patents

Dispositif d'échange de chaleur et son utilisation

Info

Publication number
EP3143357A1
EP3143357A1 EP15717147.1A EP15717147A EP3143357A1 EP 3143357 A1 EP3143357 A1 EP 3143357A1 EP 15717147 A EP15717147 A EP 15717147A EP 3143357 A1 EP3143357 A1 EP 3143357A1
Authority
EP
European Patent Office
Prior art keywords
heat transfer
transfer device
heat
textile structure
channel
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.)
Granted
Application number
EP15717147.1A
Other languages
German (de)
English (en)
Other versions
EP3143357B1 (fr
Inventor
Lena Schnabel
Eric Laurenz
Hannes Fugmann
Steffen Kaina
Thomas Studnitzky
Friedrich A. ROELL
Kurt HATTLER
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.)
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
Publication of EP3143357A1 publication Critical patent/EP3143357A1/fr
Application granted granted Critical
Publication of EP3143357B1 publication Critical patent/EP3143357B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • 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
    • 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
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Definitions

  • the invention relates to a heat transfer device with channels for heat-absorbing media and channels for heat-emitting media, wherein at least one of the channels has a textile structure with compressed and non-compacted areas. While the densified regions are located in the transition regions between the heat transfer enhancement channels at or over the channel wall, the non-densified regions are located in the flow regions of the channels.
  • This structure allows a large heat transfer to the heat transfer surface with good heat conduction from the heat transfer surface to the interface.
  • the invention also relates to heat exchangers with such heat transfer devices.
  • the surface enlargement is of central importance in the phenomenon of heat transfer.
  • the following objectives are in the foreground:
  • Another possibility for the production of large specific surfaces and a cohesive contacting to the separation surface are metallic short fiber structures. These are poured onto one another, pressed together and then soldered or sintered. By varying the fiber length and diameter, a variation of density and porosity can be achieved. They achieve volume-specific surfaces of 8,000-10,000 m 2 / m 3 and volume-specific interfaces between the two media in the range of 100 m 2 / m 3 . For use in flowing media, however, the undefined orientation and arrangement of the fibers is disadvantageous.
  • the combination of fabric mats and pipes also provides a way to increase surfaces.
  • Heat exchanger structure defined.
  • the invention is characterized in that the tube is integrated in a weave structure.
  • a heat transfer element in which the heat transfer is achieved by standing vertically in the flow, mutually equally spaced ribs.
  • Suitable dimensions are the 4 mm 2 rod cross-section and the 0.3 rod / rod length ratio.
  • woven and knitted fabrics are mentioned as a preferred material and described both for the wall and for the production of the bar structure.
  • the rods are conceivable, for example, in the form of loops.
  • WO 2012/141793 A1 describes a general hierarchically structured surface enlargement for heat exchangers with flat plates.
  • the surface enlargement forms channels in the flow direction of the
  • Heat exchangers made of slices cut from a block of layered fabric. The surfaces of these discs are sealed by coating methods, so that a media separation without additional separating elements (Platen, films) is achieved.
  • the technical problem underlying the present invention stands in the non-optimal adaptation of available surface enlargements to the respective question and installation situation.
  • the requirement for high heat transfer performance with small driving temperature differences and small pressure losses with low material usage in a small space is not sufficiently met with the known from the prior art solutions. This is accompanied by an increased consumption of material and energy to overcome the pressure losses.
  • a heat transfer device which has at least one channel for a heat-absorbing medium and at least one channel for a heat-emitting medium. At least one of these channels has a textile structure at least in certain regions, the textile structure having densely compressed regions at regular intervals, the compacted regions of the textile structure being in the transition region between at least one channel for a heat-absorbing medium and at least one channel for a heat-emitting medium Medium for establishing a thermal contact between these channels are arranged. Furthermore, non-compressed regions of the textile structure are arranged in the flow region of at least one channel.
  • channel also means those regions which are channel-shaped, but due to the filling with a solid, e.g. PCM, no more channel or, as in lecturnitzschreiben, are open to the environment.
  • a solid e.g. PCM
  • the textile structures used according to the invention enable very large heat transfer surfaces. These are aligned so that at the same time a large heat transfer to the heat transfer surface and a good Heat conduction is achieved from the heat transfer surface to the interface. When flowed through heat transfer devices, the flow is disturbed only as far as possible, as it serves to improve the heat transfer.
  • the heat transfer device according to the invention has the advantage that, with simultaneous use of material and volume of construction, less energy has to be expended for the same heat transfer. With the same use of energy and construction volume less material must be used for the heat transfer device according to the invention and with the same use of energy and material, the volume can be reduced.
  • a preferred embodiment provides that the channels for the heat-absorbing media from the channels for the heat-emitting media through a partition, in particular a sheet, a film, a membrane or the outer surface of a tube or hose, are separated.
  • the densified areas in the transition region of the channels with the partition at least partially cohesively connected, in particular by gluing, soldering, welding, sintering or casting.
  • a further embodiment according to the invention provides that the textile structure has a coating impermeable to the media at the densified areas.
  • a further embodiment of the invention relates to a heat transfer device for the separation of adjacent channels in at least one channel integrated for the media impermeable, expandable hose or tube and / or at least one channel a medium impermeable, shrinkable tube or tube is arranged through
  • Expanding and / or shrinking allow contacting with the textile structure.
  • the textile structure arranged in at least one channel can preferably be flowed through by a fluid in a heat-transferring manner, at least in regions.
  • the textile structure can be at least partially in a latently heat-storing, sorptive or catalytic be embedded stationary medium.
  • a further preferred embodiment provides that the textile structures of mutually adjacent channels have different wire lengths and / or spacings of the wires in the interface plane.
  • the non-compressed regions can preferably be varied so that the flow resistance in the channel over the wire lengths, wire diameter and / or distances of the wires is adjustable.
  • This can be used, in particular, to produce obliquely flowed structures with intermediate secondary channels.
  • the flow velocity is reduced by the textile structure through which the oblique structures flow.
  • yarn or wire diameters large heat transfers are achieved even at low flow velocities.
  • the obliquely flowed area may include generally compacted and non-compacted textile structures and possibly separate heat transfer media flowing in the plane of this area.
  • Such an arrangement of the fabric structures is particularly possible if the structures are flat, d. H. be made with a low flow depth.
  • a folding of these planar structures into the desired shape can take place in a second production process.
  • the generation of a secondary, structure-free channel by corresponding folding of the structure is not limited to textile structures. This can be achieved by other through-flow heat transfer structures, in particular lamellas,
  • the textile structure is preferably made of wires, technical fibers or yarns thereof with a preferred diameter of 10 ⁇ to 2 ⁇ , more preferably from 80 ⁇ to 300 ⁇ .
  • the wires, technical fibers or yarns thereof preferably have in the flow direction a distance of 20 ⁇ to 20 mm, preferably from 40 ⁇ to 10 mm and more preferably from 100 ⁇ to 4 mm.
  • the wires, engineering fibers or yarns thereof are preferably selected from the group consisting of
  • Carbonaceous materials in particular carbon fibers, activated carbon fibers,
  • Polymer materials in particular polypropylene (PP), polyethylene (PE), polyamide (PA), polyether ketones (PEK), polyesters (PET) and
  • the textile structure preferably has an intrinsic rigidity which allows a self-supporting construction of the heat exchanger.
  • the textile structure preferably consists of a weaving, knitting or knitting structure or combinations thereof.
  • the fabric structure used was galvanically coated with a solder and by melting the solder, the inherent stability of the structure and the cohesive connection at the nodes of the wires with each other and the interface is implemented.
  • a preferred embodiment provides that in the heat transfer device lighting elements, in particular optical fibers or LEDs having elements are integrated, preferably in the form of incorporated wires, fibers or yarns.
  • At least one heating wire in particular made of copper, copper-nickel alloys, nickel-chromium alloys, Konstantan, manganin, nickel-iron alloys or Kanthai is integrated.
  • a heat exchanger is likewise provided which comprises a heat transfer device according to the invention, as described above. ben, contains.
  • the heat exchanger is preferably a plate heat exchanger, a shell-and-tube heat exchanger, a tube bundle fin heat exchanger, a flat tube fin heat exchanger or a coaxial heat exchanger.
  • the heat transfer devices according to the invention are used in particular in heat transfer to / from air or other gaseous media (eg recoolers, flue gas heat exchangers, convectors, ventilation devices, oil coolers, etc.), in heat transfer to / from water or other liquid media, in phase change applications ( Evaporation, condensation, solid / liquid) and in combination with sorption materials or catalytic coatings.
  • air or other gaseous media eg recoolers, flue gas heat exchangers, convectors, ventilation devices, oil coolers, etc.
  • phase change applications Evaporation, condensation, solid / liquid
  • FIG. 1 shows the textile structure according to the invention with reference to two embodiments (FIGS. 1a and 1b) in the flat as well as in the folded state.
  • FIG. 2 shows a first flat embodiment (FIG. 2 a) and a second tubular embodiment (FIG. 2 b) of the heat transfer device according to the invention.
  • FIG. 3 shows a variant of a heat transfer device according to the invention with a combination of different textile structures (FIG. 3a) and in combination with a collector (FIG. 3b).
  • FIG. 4 shows a variant of the textile structure with different wire spacings (FIG. 4a) and wire lengths (FIG. 4b) in the area through which it has flowed through.
  • FIG. 5 shows a variant according to the invention of a coaxial heat exchanger using the elements previously shown (FIG. 4b).
  • Fig. 6 shows another embodiment of a textile structure according to the invention.
  • Fig. 7 shows a further embodiment of the textile according to the invention Structure shown.
  • Fig. 8 shows inventive examples of structural surfaces.
  • Fig. 1 on the left side (Fig la), a flat web of wires is shown having non-densified areas (1) and tighter wire areas (2). Folding this structure creates a spacer structure that forms a flow channel and two cover surfaces. Two examples of such spacer structure are shown in Fig. La in the middle part and the lower part. While in the middle part of the figure the wires of the non-compacted area are arranged obliquely, in the lower part of FIG. 1a the wires are arranged parallel to each other and perpendicular to the formed wall surface.
  • Fig. Lb a comparable embodiment is shown, but in which the narrower-made areas (2) over the areas with long wire distances (1) turn out larger.
  • the folding leads to tapered secondary channels.
  • the non-compacted regions of the textile structure situated between the secondary channels are thus flowed through at a lower normal speed than the inflow velocity, so that a lower pressure loss is achieved.
  • the wall surfaces formed can be joined by means of one of the above-mentioned joining methods with a partition wall or coated directly impermeable.
  • the folded structure outlined above has been formed on the wall surfaces with a parting surface (3) which is referred to as a
  • Sheet metal or foil was made, contacted via solder joints (4). On the other side of the partition, the same textile structure is rotated by 90 °, so that this element can be used for example in a cross-flow plate heat exchanger.
  • the densified areas of the textile structure (2) form a tubular shape which is applied from the outside to a partition wall formed by tubes.
  • the non-compacted regions (1) thus form the surface-enlarging structure in the region between the tubes.
  • This structure can for example be flowed through heat transferring perpendicular to pipes and wires.
  • the dimensioning of the flow structures can be flexibly adapted to the corresponding media or flow conditions separated by separating surfaces (7). For example, it is conceivable that the dimensions of the wire spacings and heights for on the various
  • Pages of the heat exchanger are different.
  • FIG. 5 shows a coaxial heat exchanger with peripheral outer sheath 6, wherein the individual segments of the tube cross-section are filled with the textile structure according to the invention.
  • the non-compacted areas 1 and the partition 2, where the densified areas are located can be seen.
  • the segments are alternated with the one or the other medium flows through so that one medium flows in and the other medium from the image plane.
  • Manufacturing technology also allows the generation of flow structures that are produced in one production step (see FIG. 6), whereby the non-compressed wires (1) can be arranged obliquely to one another.
  • the connection to the top surface (5) can be achieved for example by knitting process. Due to the oblique position of the wires is an increased intrinsic stability of
  • FIG. 7 shows an arrangement of the textile structures is shown as a heat exchanger.
  • the area of the textile structure is exemplified by the structure shown in FIG. 2 (b).
  • One of the heat-transferring media first flows through the inflow region of the heat exchanger (10), then through the structure-free secondary channel region (11) to the textile structure (12). This is flowed through by the medium at lower speeds than in the inflow, since the area to be flowed through the folding of the structures was greatly increased.
  • the medium then flows through the outflowing structure-free channels (13) into the outflow region (14).
  • Fig. 8 various embodiments of the structural surfaces are shown.
  • An evenly distributed, low velocity through the structure can be made possible, for example, by these various configurations (tapered (Fig. 8a), hyperbolic tapering (Fig. 8b), sinusoidal tapering (Fig. 8c).)
  • An equally distributed velocity through the structure is advantageous. to optimally utilize all areas of the structure for heat transfer Depending on the arrangement, fewer and more densified areas in the structure may vary along the fabric structure ( Figures 7, (12)) and further promote uniformity of distribution.
  • FIG. 8d shows an exemplary embodiment with a plurality of folded structures connected in series.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un dispositif d'échange de chaleur comportant des canaux pour des milieux absorbant de la chaleur et des canaux pour des milieux dégageant de la chaleur, au moins un des canaux présentant une structure textile pourvue de zones comprimées et de zones non comprimées. Tandis que les zones comprimées sont disposées dans les zones de passage entre les canaux pour améliorer le passage de chaleur sur la paroi de canal ou au moyen de celle-ci, les zones non comprimées sont disposées dans les zones d'écoulement des canaux. Cette construction permet un passage de chaleur important sur la surface d'échange de chaleur tout en conservant une bonne conduction thermique de la surface d'échange de chaleur vers la surface de séparation. L'invention concerne également des échangeurs de chaleur comportant de tels dispositifs d'échange de chaleur.
EP15717147.1A 2014-05-12 2015-04-13 Dispositif d'échange de chaleur et son utilisation Active EP3143357B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014208955.7A DE102014208955A1 (de) 2014-05-12 2014-05-12 Wärmeübertragungsvorrichtung und deren Verwendung
PCT/EP2015/057962 WO2015172954A1 (fr) 2014-05-12 2015-04-13 Dispositif d'échange de chaleur et son utilisation

Publications (2)

Publication Number Publication Date
EP3143357A1 true EP3143357A1 (fr) 2017-03-22
EP3143357B1 EP3143357B1 (fr) 2020-05-06

Family

ID=52988047

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15717147.1A Active EP3143357B1 (fr) 2014-05-12 2015-04-13 Dispositif d'échange de chaleur et son utilisation

Country Status (4)

Country Link
US (1) US10605543B2 (fr)
EP (1) EP3143357B1 (fr)
DE (1) DE102014208955A1 (fr)
WO (1) WO2015172954A1 (fr)

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DE102017216630B4 (de) * 2017-09-20 2023-04-27 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zur Herstellung eines Wärmeübertragers
NL2019792B1 (en) * 2017-10-24 2019-04-29 Micro Turbine Tech B V Heat exchanger comprising a stack of cells and method of manufacturing such a heat exchanger
DE102018203548A1 (de) 2018-03-08 2019-09-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Wärmeübertrager und Verfahren zu dessen Herstellung
US11391523B2 (en) * 2018-03-23 2022-07-19 Raytheon Technologies Corporation Asymmetric application of cooling features for a cast plate heat exchanger
FR3085744B1 (fr) 2018-09-06 2020-11-27 Esiee Paris Chambre De Commerce Et Dindustrie De Region Paris Ile De France Echangeur thermique flexible comprenant un assemblage de sondes thermiques flexibles
DE102018220858A1 (de) * 2018-12-03 2020-06-04 Eberspächer Catem Gmbh & Co. Kg Elektrische Heizvorrichtung
PL242269B1 (pl) * 2020-02-24 2023-02-06 Krzysztof Bruzi Urządzenie wentylacyjne
DE102021209504A1 (de) * 2021-08-30 2023-03-02 Robert Bosch Gesellschaft mit beschränkter Haftung Kühlrippenanordnung eines fluiddurchströmbaren Kühlers zum Kühlen einer Leistungselektronik
PL247120B1 (pl) * 2023-05-24 2025-05-19 Politechnika Lodzka Rekuperator dzianinowy

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Also Published As

Publication number Publication date
US10605543B2 (en) 2020-03-31
WO2015172954A1 (fr) 2015-11-19
DE102014208955A1 (de) 2015-11-12
EP3143357B1 (fr) 2020-05-06
US20170089647A1 (en) 2017-03-30

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