EP3290849A1 - Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique - Google Patents

Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique Download PDF

Info

Publication number
EP3290849A1
EP3290849A1 EP16001913.9A EP16001913A EP3290849A1 EP 3290849 A1 EP3290849 A1 EP 3290849A1 EP 16001913 A EP16001913 A EP 16001913A EP 3290849 A1 EP3290849 A1 EP 3290849A1
Authority
EP
European Patent Office
Prior art keywords
tube
turbulator
heat exchanger
printing
longitudinal axis
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.)
Withdrawn
Application number
EP16001913.9A
Other languages
German (de)
English (en)
Inventor
Manfred Steinbauer
Christian Matten
Ole Müller-Thorwart
Elise Estiot
Stefan Gewald
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Priority to EP16001913.9A priority Critical patent/EP3290849A1/fr
Publication of EP3290849A1 publication Critical patent/EP3290849A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • 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
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • 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

Definitions

  • the invention relates to a heat exchanger and a method for producing at least one tube of a heat exchanger.
  • Coiled heat exchangers have a pressure-bearing jacket, which surrounds a jacket space for receiving a first fluid and extends along a longitudinal axis, and a core tube extending in the jacket, which extends along the longitudinal axis, which, relative to a heat exchanger arranged as intended, preferably along the Vertical runs.
  • the heat exchanger furthermore has a tube bundle arranged in the jacket space, which tube has at least one tube and serves for receiving the second fluid, wherein this at least one tube is helically wound around the core tube.
  • Geradrohr Berntontrager also have a pressure-bearing jacket, which surrounds a jacket space for receiving a first fluid and extending along a longitudinal axis. They further have in the shell space a plurality of parallel guided along the longitudinal axis arranged tubes, which are arranged between the shell space the front end final tube sheets.
  • Coiled heat exchangers are currently used in various plants in the process industry, e.g. in LNG plants as natural gas liquefiers, in Rectisol plants as methanol coolers, in replacement systems of air separation plants or petrochemical plants as water bath evaporators and heat energy storage systems as molten salt heat exchangers.
  • Water bath evaporators are designed to evaporate a guided in the tube bundle liquefied gas, wherein the tube bundle is disposed in a water bath located in the shell space.
  • Flow turbulators are used in straight tube heat exchangers in the process industry to improve heat transfer. Such turbulators are typically formed as bands extending along a helical path within the tubes.
  • the heat transfer enhancement is primarily accomplished by creating a vortex flow of the tube side fluid which provides a higher velocity near the tube wall and improved fluid mixing. This results in an increase in the heat transfer coefficient and in a pressure drop.
  • Prior art flow turbulators are retracted into the respective tubes. This is only possible in a straight condition of the pipes. In wound heat exchangers, therefore, the tubes must be stretched before retracting the turbulators and then wound up on the core tube.
  • the cross section of the turbulators In order to allow it to be drawn into the pipes, the cross section of the turbulators must be slightly smaller than the internal cross section of the pipes. This prevents optimal geometry of the turbulators.
  • the turbulators may be damaged as they pass through the tubes, particularly turbulators made of reticulated material (e.g., hi-tran inserts).
  • the object arises to provide an improved in view of the disadvantages mentioned heat exchanger with turbulators, in particular a wound heat exchanger.
  • a first aspect of the invention relates to a heat exchanger for indirect heat transfer between a first and a second fluid, the heat exchanger having a jacket which surrounds a jacket space for receiving the first fluid and extending along a longitudinal axis, and wherein the heat exchanger further in the shell space arranged tube bundle having at least one tube for receiving the second fluid, wherein the at least one tube has an inner space enclosed by a wall, and wherein the at least one tube comprises a turbulator, which is arranged in at least a portion of the interior of the at least one tube, and wherein the tube with the turbulator disposed therein is formed by 3D printing, wherein the turbulator is integrally formed by the 3D printing with the wall of the at least one tube.
  • Such a turbulator is configured to fluidize a flow carried in the at least one tube.
  • the turbulator according to the invention is made in one piece, ie integrally, with the wall of the at least one tube.
  • the at least one tube thus has a defined internal structure, which is in constant contact with the inner tube wall.
  • the heat exchanger according to the invention has the advantage of a simplified manufacturing process.
  • 3D printing can be used to produce tubes with integrated turbulators. These are then wound in a further step, for example, around a core tube in order to obtain a wound heat exchanger.
  • the inclusion of the turbulators in the tubes, and thus the stretching of the tubes can be omitted.
  • the 3D-printed turbulators according to the invention have an increased mechanical stability and an increased service life. In particular, mechanical damage to the turbulators when they are pulled or wrapped by the turbulators integral with the tubes is avoided.
  • the turbulators according to the invention can be formed in any shape and arrangement and arranged in the tubes, which allows optimization of the flow guidance, heat transfer and pressure drop.
  • the turbulators according to the invention can also be formed of the same material as the tubes.
  • the at least one tube with the turbulator can be produced in particular by known 3D printing methods, such as e.g. Selective Laser Sintering (SLS), Electron Beam Melting / Electron Beam Additive Manufacturing (EBM / EBAM), Fused Filament Fabrication (FFF), Melt Stratification (eg Fused Deposition Modeling, FDM), Stereolithography (STL, SLA), Digital Light Processing (DLP) ), Multi Jet Modeling (MJM), Polyjet, Film Transfer Imaging (FTI), laser cladding, or Laminated Object Modeling (LOM).
  • SLS Selective Laser Sintering
  • EBM / EBAM Electron Beam Melting / Electron Beam Additive Manufacturing
  • FFF Fused Filament Fabrication
  • FDM Melt Stratification
  • FDM Melt Stratification
  • STL Stereolithography
  • SLA Stereolithography
  • DLP Digital Light Processing
  • MJM Multi Jet Modeling
  • Polyjet Film Transfer Imaging
  • FI Laser
  • the heat exchanger according to the invention can have both turbulators 3D-printed tubes and conventional tubes (without turbulator or with conventional turbulators). It is also conceivable that only certain pipe sections with the pipe have 3D-printed turbulators within the pipes. Other pipe sections may in particular be designed with a smooth inner wall and / or conventional turbulators (which are not printed together with the pipe 3D).
  • the turbulator is formed as a band extending along a helical path having first and second edges extending along the helical path, the two edges helically revolving the path, and the two edges being respectively connected to the wall of the at least one a pipe are integrally connected by the 3D printing, so that the interior is divided into two separate subspaces.
  • the turbulator extends only over a portion of the at least one tube along a tube longitudinal axis in the interior of the at least one tube.
  • the turbulator extends over the entire length of the at least one tube along a tube longitudinal axis in the interior of the at least one tube.
  • the at least one tube is formed integrally with the turbulator by 3D printing, in particular laser sintering, of a metal, in particular aluminum.
  • the at least one tube with the turbulator disposed therein by the 3D printing as a one-piece unit layers of a powdered material, in particular comprising a metal, in particular aluminum, printed, so that the turbulator cohesively with the wall of the at least one Pipe is formed, wherein successively several layers of the material are applied one above the other, each layer is heated before the application of the next following layer by means of a laser beam at a printing position corresponding to a cross-sectional area of the unit to be produced, and is thereby fixed to the underlying layer, in particular merged with this.
  • a powdered material in particular comprising a metal, in particular aluminum
  • Such heat exchangers are referred to as Geradrohr Anlagenübertrager.
  • the heat exchanger has a core tube arranged in the jacket space, which extends along the longitudinal axis, wherein the at least one tube is helically wound around the core tube.
  • the core tube carries the load of the tube bundle.
  • Such heat exchangers are referred to as wound heat exchangers.
  • the turbulator has at least one through-hole and / or at least one projection, in particular along the pipe cross-section of the pipe, wherein the at least one through-hole and / or the at least one projection are formed together with the turbulator by the 3D printing or is.
  • the at least one projection is formed cohesively with the turbulator.
  • the at least one through-hole connects the first and second sub-spaces of the tube interior, which is formed by the turbulator.
  • the turbulator has a plurality of through holes and / or a plurality of projections. These may be distributed uniformly over the surface of the turbulator, or be arranged at certain particularly favorable for generating a turbulence positions.
  • a second aspect of the invention relates to a method for producing at least one tube of a heat exchanger, in particular according to the first aspect of the invention, wherein the at least one tube is formed together with the turbulator therein by 3D printing and thereby by the 3D printing of the turbulator cohesively connected to a wall of the at least one tube.
  • the turbulator is formed cohesively with the wall of the at least one tube.
  • the at least one tube is formed together with the turbulator arranged therein by 3D printing, in particular laser sintering, of a metal, in particular aluminum.
  • the at least one tube, together with the turbulator disposed therein, is printed as a one-piece unit in layers of a powdered material, in particular comprising a metal, in particular aluminum, wherein successively several layers of the material be applied over each other, each layer is heated prior to the application of the next following layer by means of a laser beam at a printing position corresponding to a cross-sectional area of the unit to be produced, and is thereby fixed to the underlying layer, in particular merged with this.
  • a powdered material in particular comprising a metal, in particular aluminum
  • the application of the layers may e.g. take place in a cross-sectional plane of the tube with turbulator, wherein successively cross-sectional layers of the tube are printed with turbulator.
  • the layers may also be applied in another direction, in particular perpendicular to the cross-sectional plane, wherein the layers of at least one section of the tube are formed in the longitudinal direction of the tube.
  • a suitable 3D printing device has at least one laser source for generating a laser beam, a material supply for providing the material and a transport device, wherein the transport device is adapted to the workpiece, so the partially finished tube with the turbulator, against the laser source and the To move material supply and / or to move the laser source and the material supply to the workpiece.
  • FIG. 1 shows in connection with FIG. 2 a heat exchanger 1 according to the invention, which is characterized in that it comprises a tube bundle 2 with at least one tube 20 (see, in particular Fig. 2 ), which runs along a longitudinal axis L of the heat exchanger 1 and thereby helically wound around or on a core tube 21 of the heat exchanger 1, so that it along an imaginary Helical orbit B runs in the FIG. 1 is indicated.
  • the at least one tube 20 is a cohesively connected to a wall W of the tube turbulator 200 is arranged (see. FIG. 2 ), wherein the turbulator 200 is helically wound along a tube longitudinal axis I R.
  • the heat exchanger 1 according to the invention FIGS. 1 and 2 said core tube 21 on which the tubes 20 of the tube bundle 2 are wound so that the core tube 21 carries the load of the tubes 20.
  • the invention is also generally applicable to wound heat exchanger without core tube, in which the tubes 20 are helically wound around the longitudinal axis L.
  • the heat exchanger 1 is designed for indirect heat transfer between a first and a second fluid and has a jacket 10 which surrounds a jacket space M for receiving the first fluid, for example via an inlet port 101 on the shell 10 in the shell space M introduced and, for example via a corresponding outlet port 102 on the jacket 10 again from the shell space M is removable.
  • the jacket 10 extends along the said longitudinal axis L, which preferably extends along the vertical with respect to a heat exchanger 1 arranged as intended.
  • the tube bundle 2 is further arranged with a plurality of tubes 20 for receiving the second fluid.
  • These tubes 20 are preferably helically wound in several layers 22 on the core tube 21, wherein the core tube 21 also extends along the longitudinal axis L and is arranged concentrically in the shell space M.
  • Several tubes 20 of the tube bundle 2 can each form a tube group (in the FIG.
  • the jacket 10 and the core tube 21 can furthermore be of cylindrical design, at least in sections, so that the longitudinal axis L forms a cylinder axis of the jacket 10 and of the concentric core tube 21 extending therein.
  • a shirt 3 can further be arranged, which the tube bundle. 2 or the at least one tube 200 encloses, so that between the tube bundle 2 and that shirt 3, a gap surrounding the tube bundle 2 or tube 200 is formed.
  • the shirt 3 serves, if necessary, to suppress a bypass flow of the first fluid guided in the jacket space M, with which the tube bundle 2 / tube 200 is acted upon, as far as possible to suppress the tube bundle 2 / tube 200.
  • the first fluid is thus preferably guided in the jacket space M in the region of the jacket space M surrounded by the shirt 3.
  • the individual pipe layers 22 (in particular in the case of horizontal support of the tube bundle 2) can be supported on spacer elements 6 extending along the longitudinal axis L and on the core tube 21 in each case, wherein a plurality of spacer elements 6 can be arranged one above the other in the radial direction R of the tube bundle 2.
  • FIG. 2 shows an approximately half-finished tube 20 of a heat exchanger 1 according to the invention during the 3D-pressure of the tube 20 together with the turbulator 200.
  • the tube 20 has a turbulator 200, which integrally executed by 3D printing of the tube 20 together with the turbulator 200 is, wherein the turbulator 200 is materially connected to the wall W of the tube 20.
  • FIG. 2 a laser source 30 for generating a laser beam 31 and a fabric feeder 40 for feeding a material 41.
  • the laser source 30 and the fabric feeder 40 are aligned with the partially finished pipe 20 so that the material 41 at a printing position 203 on the partially completed Tube 20 can be applied, wherein the laser beam 31 is directed to the respective printing position 203, so that the material 41 is melted by means of the laser beam 31 and the material 41 is applied to the tube 20 and connected to this materially.
  • the structure of the tube may be layered 20 and the turbulator 200, so that the finished tube 20 is completely printed with the turbulator 200.
  • the tube 20 is printed in layers along with the turbulator 200, with the printed layers along the Pipe longitudinal axis I R run.
  • the printed layers run along the tube cross-section.
  • the tube 20 can also be printed onto a core tube 21 or a support structure in such a way that it simultaneously receives its helical course around the core tube 21 as a result of the 3D printing. The tube 20 then no longer has to be bent or wound.
  • the present invention is not limited to the 3D printing technique described above, but any suitable 3D printing techniques for printing the pipe 20 with the turbulator 200 may be used.
  • the turbulator 200 may be embodied in the form of an elongated belt that is helically twisted. That is, the band 200 extends according to FIG. 2 along a pipe longitudinal axis I R , wherein mutually opposite edges 201,202 of the belt 200 respectively helically rotate around this pipe longitudinal axis I R. If the tube 20 is completed, the two edges 201, 202 are firmly bonded to the inside of the wall W of the tube 20 and subdivide the interior of the tube 20 into a corresponding first and a second subspace T, T '.
  • the turbulator 200 also has a through-hole 204 which connects the first and second sub-chambers T, T 'and thus allows the liquid flowing through the tube 20 to flow from the first sub-chamber T into the second sub-chamber T' and vice versa. This leads to a Strömungsverwirbelung, a better mixing and therefore to improved heat transfer.
  • the turbulator 200 may include a plurality of through holes 204 that are evenly or nonuniformly distributed across the surface of the turbulator 200.
  • Turbulator 200 shown further comprises a projection 205, which is in particular in the cross-sectional plane of the tube 20 extends.
  • the projection 205 has a quadrangular cross-sectional area which extends in the tube cross-sectional plane. But there are also other forms conceivable.
  • the Projection 205 results in a flow swirl and a better mixing of the liquid flowing through the tube 20 and therefore to an improved heat transfer.
  • the turbulator 200 may include a plurality of protrusions 205 that are evenly or non-uniformly distributed across the surface of the turbulator 200.
  • the tube longitudinal axis I R (initially or before winding) has a helical course after the tube 20 has been wound onto the core tube 21, the two now Edges 201, 202 in turn run helically around this path B (see. FIG. 1 ).
EP16001913.9A 2016-09-01 2016-09-01 Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique Withdrawn EP3290849A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16001913.9A EP3290849A1 (fr) 2016-09-01 2016-09-01 Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16001913.9A EP3290849A1 (fr) 2016-09-01 2016-09-01 Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique

Publications (1)

Publication Number Publication Date
EP3290849A1 true EP3290849A1 (fr) 2018-03-07

Family

ID=56853440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16001913.9A Withdrawn EP3290849A1 (fr) 2016-09-01 2016-09-01 Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique

Country Status (1)

Country Link
EP (1) EP3290849A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011127574A1 (fr) * 2010-04-13 2011-10-20 Prodigy Energy Recovery Systems Inc. Turbulateur et appareil à canalisation pour un échangeur de chaleur
WO2013163398A1 (fr) * 2012-04-25 2013-10-31 Flowserve Management Company Échangeur de chaleur muni d'un treillis issu de la fabrication additive
US20140102673A1 (en) * 2012-10-11 2014-04-17 Carrier Corporation Heat transfer enhancement for a condensing furnace
WO2015007375A1 (fr) * 2013-07-16 2015-01-22 Linde Aktiengesellschaft Échangeur de chaleur muni d'un élément élastique
EP2977707A1 (fr) * 2014-07-22 2016-01-27 Hamilton Sundstrand Space Systems International, Inc. Distributeur de flux pour plaque de transfert de chaleur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011127574A1 (fr) * 2010-04-13 2011-10-20 Prodigy Energy Recovery Systems Inc. Turbulateur et appareil à canalisation pour un échangeur de chaleur
WO2013163398A1 (fr) * 2012-04-25 2013-10-31 Flowserve Management Company Échangeur de chaleur muni d'un treillis issu de la fabrication additive
US20140102673A1 (en) * 2012-10-11 2014-04-17 Carrier Corporation Heat transfer enhancement for a condensing furnace
WO2015007375A1 (fr) * 2013-07-16 2015-01-22 Linde Aktiengesellschaft Échangeur de chaleur muni d'un élément élastique
EP2977707A1 (fr) * 2014-07-22 2016-01-27 Hamilton Sundstrand Space Systems International, Inc. Distributeur de flux pour plaque de transfert de chaleur

Similar Documents

Publication Publication Date Title
DE60032525T2 (de) Rohr für Wärmetauscher
EP3479982B1 (fr) Rouleau de refroidissement
WO2007082515A1 (fr) Échangeur de chaleur à faisceau de tubes
EP3062054A1 (fr) Échangeur thermique, en particulier pour un vehicule automobile
DE102013020469A1 (de) Wärmeübertrager und Verfahren zum Herstellen eines Wärmeübertragers
DE102017102143A1 (de) Laseroszillationsvorrichtung mit Lasermedium-Zirkulationsrohr
EP3290849A1 (fr) Échangeur thermique et procede de fabrication d'au moins un tube d'echangeur thermique
WO2020074117A1 (fr) Échangeur de chaleur spiralé, procédé de fabrication d'un échangeur de chaleur spiralé, et procédé d'échange de chaleur entre un premier fluide et un second fluide
WO2014127964A1 (fr) Élément de transfert thermique
DE102016012388A1 (de) Verteilerplattenpaket für einen blaskopf einer blasfolienanlage, blaskopf, verfahren zum herstellen einer folie im blasfolienverfahren, verfahren zum umrüsten eines blaskopfes sowie blasfolienanlage
WO2012097797A2 (fr) Échangeur thermique et moteur à réaction comportant un tel échangeur thermique
EP4226224A1 (fr) Procédé de fabrication d'un composant fabriqué en partie pour un dispositif technique
DE1932930A1 (de) Verfahren und Vorrichtung zur Herstellung von turbulenzerzeugenden Gebilden an den Aussenflaechen von Roehren
EP2912394B1 (fr) Échangeur de chaleur avec plusieures entrées et procédé d'adaption de la surface chauffante de l'échangeur thermique
DE2708377A1 (de) Rohrfoermiger waermetauscher
DE102017118444B4 (de) Temperierschlange und Verfahren zum Herstellen dieser Temperierschlange
DE102006000736B4 (de) Verfahren zur Herstellung eines Rohr/Rippen-Blockes und Vorrichtung zur Durchführung des Verfahrens
DE2340711A1 (de) Verwendung eines rohres als waermeuebertragungsrohr fuer ueberkritische stroemung
DE102011010896A1 (de) Wärmetauscher
DE2832938A1 (de) Rohrbuendel zur waermeuebertragung durch beruehrung
DE1751347A1 (de) Stranggepresste Hohlprofile ohne Laengsschweissnaehte an den druckfuehrenden Querschnitten zur Herstellung von dichtgeschweissten Heiz- oder Kuehlflaechen
EP3921136B1 (fr) Bloc de lamelles comportant des lamelles décalées latéralement
EP3825636B1 (fr) Échangeur de chaleur et son procédé de fabrication ou de conception
DE2758134C2 (de) Verfahren zur Herstellung von Wärmetauscherrohre!) mit inneren und äußeren Längsrippen
WO2023094029A1 (fr) Procédé pour la production d'un composant, et composant corrélativement produit

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20180908