WO2018091364A1 - Échangeur de chaleur et procédé de fabrication correspondant - Google Patents

Échangeur de chaleur et procédé de fabrication correspondant Download PDF

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Publication number
WO2018091364A1
WO2018091364A1 PCT/EP2017/078874 EP2017078874W WO2018091364A1 WO 2018091364 A1 WO2018091364 A1 WO 2018091364A1 EP 2017078874 W EP2017078874 W EP 2017078874W WO 2018091364 A1 WO2018091364 A1 WO 2018091364A1
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
heat exchanger
pipe wall
heat
threads
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.)
Ceased
Application number
PCT/EP2017/078874
Other languages
German (de)
English (en)
Inventor
Joachim Baumeister
Jörg Weise
Lena Schnabel
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
Priority to EP17797924.2A priority Critical patent/EP3542117A1/fr
Publication of WO2018091364A1 publication Critical patent/WO2018091364A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • 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

Definitions

  • the invention relates to a heat exchanger having at least one pipe with a pipe wall which separates an interior from an exterior space, wherein the interior space is adapted to be flowed through by a first heat transfer fluid and the exterior space is adapted to be flowed through by a second heat transfer fluid, wherein heat from one heat transfer fluid to the other heat transfer fluid is transferable, and the pipe wall is at least partially provided with structures for enlarging the surface.
  • the invention relates to a method for producing a heat exchanger, in which at least one tube is provided with a tube wall which separates an interior from an outside space, and subsequent application of structures for enlarging the surface on at least a partial surface of the tube wall.
  • Heat ⁇ exchanger of the type mentioned can be used for example in air conditioning machines, ie heat pumps or refrigerators. Likewise, such heat exchangers can be used for the dehumidification of devices or reaction vessels.
  • the invention is therefore based on the object to provide a heat exchanger and a method for its production, which compared to known heat exchangers, a higher performance in terms of transferable amount of heat per unit area and time unit and / or facilitated production.
  • a heat exchanger with at least one pipe with at least one pipe wall is proposed.
  • the pipe wall separates an interior from an exterior space.
  • the tube may in some embodiments of the invention have a round or polygonal or elliptical cross-section. In the case of elliptical or polygonal cross sections, the width can be substantially greater than the height. In this case, the tube may be part of a plate heat ⁇ exchanger.
  • the pipe wall can be a metal or an alloy
  • the material of the pipe wall may contain aluminum, copper or steel. In other embodiments of the invention, the pipe wall may be made of a plastic. This can be known per se filling and Contain additives to lower the thermal resistance of the pipe wall.
  • the inner space on the one hand and the outer space on the other hand are each arranged to be flowed through by a first heat transfer fluid or a second heat transfer fluid.
  • the heat exchanger according to the invention may be provided, for example, to transfer heat from a liquid to a gaseous medium.
  • the heat exchanger may be configured to transfer heat from a gaseous to another gaseous heat transfer fluid.
  • the heat exchanger may be a condenser, an evaporator or a sorber. These may be adapted to condense a gaseous fluid on the outside of the tube wall and the heat of condensation by means of the in the
  • the fluid circulating in the interior can supply heat to evaporate a liquid located on the surface of the heat exchanger.
  • Such equipped heat exchanger may be part of an air conditioner or a heat storage.
  • the heat exchanger according to the invention is provided at least on one side with structures for enlarging the surface. Preferably, but not necessarily, they are
  • this may be the outside or the outside facing side of the pipe wall.
  • the following description is essentially limited to describing heat exchangers in which the outside of the tube wall is provided with structures for enlarging the surface, the invention should not be restricted to these embodiments . Rather, the said structures may also be arranged in the interior or on both sides of the pipe wall.
  • the structures for enlarging the surface contain a fabric which contains warp threads and weft threads.
  • Tissue is characterized by the fact that even materials of greater strength can be woven because no stitching is required and thus no tight bending radii occur.
  • a fabric has the advantage that either the warp threads or the weft threads in the
  • Substantially orthogonal may be arranged on the surface of the tube wall, so that heat can be transported efficiently along the corresponding threads.
  • the purpose orthogonal yarns can be used to heat horizontal, ie parallel to the tube wall to divide ⁇ ver. According to the invention, no further thread is knotted into the fabric thus formed.
  • braided structures has no meshes, which in devoured and thus not without damage removable ⁇ bar.
  • the fabric can be joined in a conventional manner to the pipe wall, for example, by soldering, gluing or welding or cast in the prototyping the pipe wall.
  • the connection is particularly flexible by soldering and / or gluing, as this can be provided in a particularly simple manner and partial surfaces of the pipe wall with the structure depending on the planned application of the heat exchanger and the attachment does not require high temperatures, which damage the pipe or could lead a tube bundle.
  • the warp and / or weft yarns may include or consist of wires having a diameter of from about 0.15 mm to about 0.40 mm. Such wires can be due to their
  • the warp threads and / or the weft threads may be a metal or a metal thread
  • Contain alloy and contain or consist of, for example, aluminum, copper or stainless steel.
  • the warp threads and / or the weft threads may consist at least partially of or contain a polymer or a biopolymer, for example starch.
  • a tissue can be provided which has comparatively high stability and is easy to handle.
  • To the attachment of the fabric on the tube wall of the heat exchanger can be easily removed warp and / or weft threads of polymer, for example, by thermal melting or oxidation.
  • Strands of starchy material can be dissolved in a solvent, such as water, and thereby removed from the tissue.
  • a solvent such as water
  • At least a portion of the filaments to be removed may consist of a polymer or contain a polymer which is removed from the tissue by a thermal process.
  • at least a portion of the threads to be removed may be starch or contain starch or another biopolymer and be removed from the tissue by a solvent, especially water.
  • the warp and / or weft threads may be removed over a width of about 4 mm to about 20 mm. Even with thin threads, which can provide a large surface area, it remains an area sufficient stability, so that the need for heat from ⁇ exchange yarns unsupported fluid bent over by the flowing heat or damaged.
  • the fabric may be rolled up and the roll thus formed joined to one end of the pipe wall.
  • the fabric can be cut into strips of a predetermined length and a width of about 10 mm to about 50 mm and subsequently rolled up.
  • the formed role to be mounted on the pipe wall. Before or optionally also afterwards, the warp or weft threads running parallel to the surface can be combed out or otherwise removed. Thus, one remains Heat transfer structure with low flow resistance, in which the amount of material used is substantially concentrated in the direction of heat transfer, ie along the normal vector.
  • the role thus formed does not necessarily have a circular contact surface with the pipe wall. Rather, the tissue can also be in polygonal
  • Forms are rolled up so as to place a plurality of rolls side by side on a pipe wall, without leaving gaps, which are not covered by the fiction, ⁇ structures for surface enlargement.
  • a plurality of layers of the fabric or at least one layer of the fabric may be provided with at least one bore and attached to at least one tube.
  • the bore can be produced for example by punching with a punch, so that warp and weft threads are removed in the bore.
  • the hole can be formed by a mandrel which compresses the warp and weft threads ⁇ in the bore and pushed together, so that the contact face on the pipe wall has a greater material density than peripheral portions of the tissue.
  • the fabric at the contact surface or contact line ⁇ along the bore may additionally soldered, glued, welded, or otherwise joined cohesively. This increases on the one hand the mechanical
  • Stability and on the other hand can increase the amount of heat transferable.
  • the fitting on the pipe wall side of the fabric may be infiltrated with a metal ⁇ melt.
  • a metal ⁇ melt This results in close to the pipe wall, a compact, mechanically very stable structure, which has a large contact surface to underlying pipe ⁇ wall and has good thermal conductivity and, if desired, heat storage capacity.
  • the distal end of the tissue remains unwetted and molten by the molten metal Accordingly, the required porosity to
  • the warp and / or weft yarns may be treated with a sorbent
  • This can be a work tool
  • Such a equipped heat exchanger can be part of an air conditioner or a
  • the contact surface between the tube wall and the orthogonal extending warp and / or weft threads may be formed by a portion of the respective threads, which with the remaining length of the warp and / or weft threads an angle of about 20 ° about 90 °.
  • the fabric may be flooded into at least a subsection or subvolume with a polymer. This feature has the effect that during infiltration with molten metal, these portions then remain free of metal. Subsequently, the polymer can be removed from the tissue again to allow the flow through with a heat transfer fluid during operation of the heat exchanger.
  • FIG. 1 shows a tube wall having a structure for enlarging the surface in a first embodiment.
  • FIG. 2 shows a tube wall with a structure for
  • FIG. 3 shows a tube with a structure for enlarging the surface according to a third embodiment.
  • FIG. 4 shows a tube wall with a structure for
  • FIG. 5 shows photographs of the fourth embodiment of the invention.
  • FIG. 1 shows a cross section through a pipe wall 100.
  • the pipe wall separates an outer space 110 from an inner space of a pipe, which is not shown in FIG.
  • the pipe wall can be flat or curved. Accordingly, the tube may have a rectangular or otherwise polygonal cross-section or a round or elliptical cross-section.
  • a structure 2 is arranged to increase the surface.
  • the structure 2 may be directed to be ⁇ , transported and heat from the pipe wall 100 to provide a larger surface area to transfer this heat flowing on an outer chamber 110 heat carrier fluid.
  • the structure 2 contains a fabric 20.
  • the fabric 20 is in turn composed of warp threads 21 and weft threads 22.
  • the fabric 20 is on the surface of the Pipe wall 100 attached that the warp threads 21 are approximately parallel to the normal vector of the surface formed by the pipe wall 100.
  • the warp yarns 21 may also be disposed at a different angle on the pipe wall 100 and include an angle of, for example, about 10 ° to about 60 ° or between about 20 ° and about 45 ° with the normal vector.
  • the weft threads 22 extend in the illustrated embodiment approximately parallel to the surface of the tube wall 100.
  • the weft threads are removed at the distal end, i. This results in a lower flow resistance of the heat transfer fluid, so that the structure according to the invention despite the removal of the weft threads 22nd
  • the removal of the weft threads 22 can take place, for example, by combing out of the fabric 20.
  • the removal of the weft threads can take place before the attachment of the fabric 20 on the tube wall 100.
  • the fabric 20 may first be secured to the pipe wall 100, wherein the fabric 20 is still a
  • the weft threads 22 to be removed may also consist of another material, in particular non-metallic material, so that they can be removed thermally or chemically by dissolution in a solvent or melting out or burnout.
  • FIG. 2 shows a single layer 4 of a fabric 20.
  • the fabric 20 is again formed by warp threads 21 and weft threads 22.
  • the bore 40 was made by punching out a hole ⁇ , so that warp and weft ⁇ threads are interrupted at the location of the bore 40.
  • the bore 40 can also be created by a mandrel which displaces warp and weft threads so that the material accumulates at the boundary of the bore 40.
  • a tube 10 is received with a pipe wall 100.
  • the fabric layer 4 can be easily attached to the tube 10.
  • the fabric layer 4 can be subsequently joined to the pipe wall, for example by welding, soldering or gluing.
  • FIG. 3 shows a tube 10 with a tube wall 100, which separates an inner space 105 from the outer space 110.
  • a first heat transfer fluid which may be liquid or gaseous.
  • the outer space 110 is traversed by a second heat carrier fluid, which may also be liquid or gas ⁇ shaped.
  • the heat transfer fluid in the outer space 110 may be sorbed, condensed, or vaporized.
  • warp threads 21 and / or the weft threads 22 may be coated with a sorbent 25.
  • Sorbent may be or contain a zeolite.
  • the structure 2 for enlarging the surface is formed by a fabric 20, which in turn is formed from warp threads 21 and weft threads 22.
  • Weft threads 22 are partially removed at the distal end of the warp threads 21, as explained in connection with FIG. From Figure 3 it can be seen that the contact surface between the tube wall 100 and the warp threads 21 is formed by a portion 23, which forms an angle of about 20 ° to about 90 ° with the remaining length of the warp threads.
  • the attachment of the warp threads on the tube wall 100 thus takes place in that the weft threads 22 are partially removed even in the lower, the tube wall 100 facing portion of the fabric 20. Subsequently, the protruding warp threads can be bent.
  • the bent portion 23 forms a comparatively large
  • FIG. 4 A fourth embodiment of the invention will be explained in more detail with reference to FIGS. 4 and 5.
  • the fabric 20 is cut into elongated strips to form the structures 2 and into a roll 3
  • the resulting role has an approximately cylindrical outer shape.
  • the roller may also have a polygonal, in particular square or rectangular plan. In this way, a plurality of rollers 3 can be arranged next to one another on the surface of the tube wall 100, without leaving uncovered areas therebetween, which would reduce the heat transferable power.
  • the roller 3 is connected with its bottom 31 with the tube wall 100, as described above.
  • the connection can thus, for example, by soldering, gluing or welding and in particular with or without the provision of a
  • weft threads in the fabric which the mechanical stability increase and allow thermal compensation between different warp threads.
  • heat is transferred from warmer warp yarns to adjacent warp yarns, and thus the temperature profile along the structures 2 homo ⁇ genome.
  • the weft threads 22 are
  • the lower, the tube wall 100 facing portion of the roller 3 and the roller 3 forming the fabric 20 may be infiltrated by a molten metal.
  • a molten metal Such a Area is in the left picture according to
  • Metal melt also serve as the weft yarns 22 to a heat balance between individual warp threads

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

Abstract

L'invention concerne un échangeur de chaleur (1) comprenant au moins un tube (10) doté d'une paroi (100), laquelle sépare un espace intérieur (105) d'un espace extérieur (110), l'espace intérieur (105) étant conçu pour être traversé par un premier fluide caloporteur et l'espace extérieur (110) étant conçu de manière à ce qu'un deuxième fluide caloporteur circule autour de celui-ci, de la chaleur étant transmise d'un fluide caloporteur à l'autre, et la paroi de tube (100) étant dotée au moins partiellement de structures (2) servant à augmenter la surface, lesquelles comportent un tissu (20) qui contient des fils de chaîne (21) et des fils de trame (22), une partie des fils de chaîne (21) et/ou une partie des fils de trame (22) étant retirées. L'invention concerne également un procédé de fabrication d'un tel échangeur de chaleur (1).
PCT/EP2017/078874 2016-11-17 2017-11-10 Échangeur de chaleur et procédé de fabrication correspondant Ceased WO2018091364A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17797924.2A EP3542117A1 (fr) 2016-11-17 2017-11-10 Échangeur de chaleur et procédé de fabrication correspondant

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016222697.5 2016-11-17
DE102016222697.5A DE102016222697B3 (de) 2016-11-17 2016-11-17 Wärmetauscher und Verfahren zu dessen Herstellung

Publications (1)

Publication Number Publication Date
WO2018091364A1 true WO2018091364A1 (fr) 2018-05-24

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ID=60327306

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PCT/EP2017/078874 Ceased WO2018091364A1 (fr) 2016-11-17 2017-11-10 Échangeur de chaleur et procédé de fabrication correspondant

Country Status (3)

Country Link
EP (1) EP3542117A1 (fr)
DE (1) DE102016222697B3 (fr)
WO (1) WO2018091364A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022210763A1 (de) * 2022-10-12 2024-04-18 ITP GmbH Gesellschaft für intelligente textile Produkte Textiler Erdwärmetauscher sowie Verfahren zur Herstellung und Verwendung eines textilen Erdwärmetauschers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714617A1 (de) * 1977-04-01 1978-10-05 Spiro Research Bv Waermeaustauscher mit auf einem traegerrohr angeordneter drahtwendel
JPS5583657U (fr) * 1978-12-05 1980-06-09
US5150748A (en) 1990-06-18 1992-09-29 Mcdonnell Douglas Corporation Advanced survivable radiator
DE102006035189A1 (de) * 2006-07-29 2008-01-31 Fachhochschule Kaiserslautern Flächige Struktur zum Transport von Wärmeenergie sowie Hohlfaser zur Bildung einer solchen Struktur
EP2418450A2 (fr) * 2010-08-11 2012-02-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Échangeur de chaleur d'une structure textile tridimensionnelle, son procédé de fabrication et son utilisation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714617A1 (de) * 1977-04-01 1978-10-05 Spiro Research Bv Waermeaustauscher mit auf einem traegerrohr angeordneter drahtwendel
JPS5583657U (fr) * 1978-12-05 1980-06-09
US5150748A (en) 1990-06-18 1992-09-29 Mcdonnell Douglas Corporation Advanced survivable radiator
DE102006035189A1 (de) * 2006-07-29 2008-01-31 Fachhochschule Kaiserslautern Flächige Struktur zum Transport von Wärmeenergie sowie Hohlfaser zur Bildung einer solchen Struktur
EP2418450A2 (fr) * 2010-08-11 2012-02-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Échangeur de chaleur d'une structure textile tridimensionnelle, son procédé de fabrication et son utilisation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022210763A1 (de) * 2022-10-12 2024-04-18 ITP GmbH Gesellschaft für intelligente textile Produkte Textiler Erdwärmetauscher sowie Verfahren zur Herstellung und Verwendung eines textilen Erdwärmetauschers

Also Published As

Publication number Publication date
EP3542117A1 (fr) 2019-09-25
DE102016222697B3 (de) 2018-01-25

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