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EP3919849A1 - Échangeur de chaleur tubulaire plan - Google Patents

Échangeur de chaleur tubulaire plan Download PDF

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Publication number
EP3919849A1
EP3919849A1 EP20178551.6A EP20178551A EP3919849A1 EP 3919849 A1 EP3919849 A1 EP 3919849A1 EP 20178551 A EP20178551 A EP 20178551A EP 3919849 A1 EP3919849 A1 EP 3919849A1
Authority
EP
European Patent Office
Prior art keywords
flat
heat exchanger
flat tubes
housing
tube heat
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
EP20178551.6A
Other languages
German (de)
English (en)
Other versions
EP3919849B1 (fr
EP3919849C0 (fr
Inventor
Joachim A. Wünning
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.)
WS Warmeprozesstechnik GmbH
Original Assignee
WS Warmeprozesstechnik 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
Priority to EP20178551.6A priority Critical patent/EP3919849B1/fr
Application filed by WS Warmeprozesstechnik GmbH filed Critical WS Warmeprozesstechnik GmbH
Priority to US17/925,760 priority patent/US20230175783A1/en
Priority to CN202180040506.3A priority patent/CN115605719A/zh
Priority to KR1020227043090A priority patent/KR20230008198A/ko
Priority to JP2022574574A priority patent/JP7564247B2/ja
Priority to PCT/EP2021/056656 priority patent/WO2021244783A1/fr
Publication of EP3919849A1 publication Critical patent/EP3919849A1/fr
Application granted granted Critical
Publication of EP3919849B1 publication Critical patent/EP3919849B1/fr
Publication of EP3919849C0 publication Critical patent/EP3919849C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28D7/16—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 arranged in parallel spaced relation
    • F28D7/1684—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 arranged in parallel spaced relation the conduits having a non-circular cross-section
    • 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
    • F28D7/16—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 arranged in parallel spaced relation
    • F28D7/163—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 arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1653—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 arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing the conduit assemblies having a square or rectangular shape
    • 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
    • F28F1/006—Tubular elements; Assemblies of tubular elements with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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
    • 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
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/12—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overpressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/32—Safety or protection arrangements; Arrangements for preventing malfunction for limiting movements, e.g. stops, locking means

Definitions

  • the invention relates to a flat tube heat exchanger, in particular a high-temperature flat tube heat exchanger for gaseous media.
  • Flat tube heat exchangers are generally known.
  • EP 2 584 301 A1 a high-temperature flat tube heat exchanger for gaseous media, with a closed housing, which has two tube sheets on two opposite sides, which in the housing divide an inlet-side plenum, a tube bundle space and an outlet-side plenum, with a tube bundle consisting of at least predominantly straight flat tubes round or polygonal ends, a tube bundle space having three zones, namely two cross-flow zones formed in the region of tube-bundle space connections and a longitudinal flow zone formed between these cross-flow zones.
  • the flat tube heat exchanger described there can be used with high temperature spread and frequent temperature changes without the risk of stress cracks.
  • Such flat tube heat exchangers have proven themselves many times, especially at gas inlet temperatures of up to 1100 ° C.
  • the efficiency of a flat tube heat exchanger depends, among other things, on the number of flat tubes used. Typically, a flat tube heat exchanger is used with an efficiency of approx. 75%. In the case of a conventional flat tube heat exchanger, the number of flat tubes has to be roughly tripled for a further increase in efficiency from approx. 75% to approx. 90% with the same throughput. As a rule, this is not economically feasible.
  • a flat tube heat exchanger in particular for gaseous media, comprising a closed housing with a tube bundle space and an inside Tube bundle space of the housing arranged tube bundle comprising a plurality of flat tubes, with corrugated strips with wave troughs and wave crests extending in the longitudinal direction of the flat tubes being arranged in the flat tubes and in the tube bundle space between the flat tubes, the wave troughs and wave crests resting on flat sides of the flat tubes inside and outside, and A device is provided to apply a surface pressure to the housing from the outside, at least in the region of the tube bundle space, which is higher than a pressure of the media guided in the flat tubes or around the flat tubes, in particular approx. 1 bar to approx. 4 bar higher .
  • an area for heat transfer from or to the medium guided in the flat tubes also referred to as the transfer area, can be more than doubled.
  • a hydraulic diameter for a flow through the flat tubes and around the flat tubes is reduced, with the result that a heat transfer coefficient is increased inversely proportionally in the case of countercurrent operation.
  • the flat tube heat exchanger is thus suitable for being operated both with high pressure differences between the media carried in the flat tubes and around the flat tubes and with high temperature fluctuations, for example when starting up and shutting down.
  • the housing usually has two collecting spaces which enable a first medium to flow into the flat tubes and the first medium to flow out of the flat tubes.
  • the collecting spaces are arranged at opposite ends of the tube bundle space.
  • tube bundle space connections are to the in Opposite ends or on the sides of the housing when viewed in the direction of flow.
  • Flat tubes are tubes which are flat at least at a central section located between two ends, i.e. have two flat sides lying opposite one another and two narrow sides connecting the flat sides.
  • the middle sections of the flat tubes have a stadium-shaped cross section with two flat flat sides parallel to one another and two curved, for example semicircularly curved, narrow sides connecting the flat sides.
  • a corrugated tape with a constant height can be used, the troughs and crests of which touch the flat sides.
  • the ends of the flat tubes that are opposite in the longitudinal direction have, in embodiments, a cross section deviating from the central section for a connection to the collecting spaces, in particular a circular cross section, a polygonal cross section or the like.
  • the flat tube heat exchanger is constructed as a rectangular arrangement with a cuboid tube bundle space and with several flat tubes arranged in rows and columns.
  • the flat tube heat exchanger is constructed as a round arrangement with a cylindrical tube bundle space which has a circular or a polygonal cross section.
  • the heat exchanger is constructed in one embodiment as a ring heat exchanger, the flat tubes being arranged along several concentric circular rings with different diameters.
  • the corrugated strips have a sinusoidal, triangular or sawtooth wave shape.
  • These wave shapes have in common that the wave crests and troughs on the flat sides only lie along a narrow strip, ideally linear, extending in the longitudinal direction. This avoids or at least minimizes accumulations of material at contact points, which negatively influence heat transfer.
  • a waveform can be suitably selected by the person skilled in the art, depending on the application, in order to achieve a desired enlargement of a transmission surface. It is also possible to create a standard earth module of a flat tube heat exchanger, flat tube heat exchangers with differently dimensioned transfer surfaces being created by choosing suitable corrugated strips.
  • the corrugated tapes also serve as a support means against deformation of the flat tubes due to a negative pressure of the medium guided in the flat tubes compared to the medium guided around the flat tubes.
  • a width of the corrugated strips is at least equal to a width of the flat sides of the flat tubes.
  • a height of the corrugated strips arranged in the flat tubes is approximately equal to the height of the flat tubes, the corrugated strips and the flat tubes, for example, having a height of approx. 2 to approx. 4 mm.
  • the flat tubes are expanded by means of pressure and / or temperature for insertion of the corrugated strips, with the corrugated strips resting on the flat sides of the flat tubes after the pressure or temperature has ceased.
  • a height of the corrugated strips arranged between the flat tubes is approximately equal to a distance between adjacent flat tubes, so that the wave peaks and troughs of these corrugated strips rest on the flat sides of adjacent flat tubes.
  • the wave peaks and troughs lie freely on the flat sides of the flat tubes, i.e. the corrugated strips are neither welded nor soldered to the flat tubes or connected in any other way.
  • the corrugated strips or flat tubes made of a material that cannot be welded or soldered. Since a device is provided according to the invention in order to apply a surface pressure to the housing from the outside, at least in the area of the tube bundle space, which is higher than the pressure of the media carried in the flat tubes or around the flat tubes, the corrugated strips are in contact with the flat tubes also ensured without a material connection between the corrugated strips and the flat tubes.
  • the device comprises a casing housing receiving the housing, the casing casing surrounding the housing at a distance at least in the region of the tube bundle space, leaving a pressure space.
  • the jacket housing is designed and designed in such a way that a fluid can be received in the pressure chamber, the pressure of which is higher, in particular approx. 1 bar to approx. 4 bar higher, than a pressure of the media in the interior of the housing.
  • a design of the jacket housing is to be carried out appropriately by a person skilled in the art, depending on the application.
  • thermal insulation is provided around the housing in order to avoid or at least reduce heating of a fluid present in the pressure space between the housing and the jacket housing.
  • the jacket housing is designed as a pressure vessel with a connection for a media supply and / or media discharge, wherein a pressure in the pressure vessel can be regulated by means of media supply and / or media discharge.
  • a closed container for receiving a pressurized fluid without or at least without substantial deformation is referred to as a pressure vessel, the pressure inside the pressure vessel being above the ambient pressure.
  • the device comprises a pair of beams and / or plates with two relatively movable, rigid beams and / or plates connected by means of tie rods, with at least one section of the housing between the beams and / or plates being the beam and / or Plate pair is arranged.
  • the beams or plates of a pair of beams or plates are connected by means of tie rods and can be clamped together with a defined force by means of a suitable device.
  • the words “a”, “an”, “an”, etc. are only used as indefinite articles and should not be interpreted as numerals.
  • the device can in particular comprise more than one pair of bars and / or plates.
  • a number of beam and / or plate pairs can be suitably selected by the person skilled in the art depending on the application.
  • a flat tube heat exchanger with such a device can be used for thermal post-combustion of contaminated air or exhaust gas.
  • the pair of bars and / or plates acts directly on the housing.
  • the device further comprises a jacket housing, the jacket housing surrounding the housing at a distance at least in the region of the tube bundle space.
  • the force applied to the casing by the pair of bars and / or plates is transmitted to the casing. In one embodiment, this takes place by means of an incompressible fluid present in the jacket housing.
  • plungers for power transmission are arranged between the jacket housing and the housing.
  • the jacket housing can be loaded from the outside by means of the pair of bars and / or plates, the load being transmitted to the housing by means of the pressure stamp.
  • thermal insulation is additionally provided between the jacket housing and the housing.
  • the corrugated strips are at least partially coated with a material that acts as a catalyst.
  • a coating is advantageous, for example, when the flat tube heat exchanger is used in a reactor for endothermic processes, for example for reforming hydrocarbons, or for exothermic processes, for example for the synthesis of artificial fuels.
  • the corrugated strips lie freely against the flat tubes, a coating is possible without any restriction in terms of weldability.
  • the corrugated strips arranged in the flat tubes or exclusively the corrugated strips arranged outside the flat tubes are coated.
  • the corrugated strips arranged in the flat tubes and those arranged outside the flat tubes have different coatings.
  • exactly one corrugated strip is provided in a flat tube, a length of the corrugated strip in the longitudinal direction of the flat tube being less than or equal to a length of the central section of the flat tube.
  • a flow through the flat tube with the corrugated tape is laminar, unless further measures are taken.
  • At least two corrugated bands are arranged in opposite directions in the flat tubes, viewed in the longitudinal direction.
  • An arrangement that is phase-shifted by 180 ° is referred to as an arrangement in opposite directions, so that wave crests and troughs of a corrugated strip are arranged in alignment with wave troughs or crests of an adjacent corrugated strip. This measure swirls the flow through the flat tube for improved heat transfer.
  • transverse ribs are arranged between two adjacent wavy belts. Further turbulence is achieved by means of the transverse ribs.
  • the wavebands and the transverse ribs are connected to one another in one embodiment. In other configurations, the corrugated strips lie freely against the transverse ribs.
  • the flat tubes are each composed of at least two flat tube pieces each extending in the longitudinal direction.
  • the flat tube pieces are produced on the basis of a tube which has a short section with a circular cross section and a smaller diameter and a section with a circular cross section and a larger diameter.
  • the section with the larger diameter can be flattened in a forming process, for example a rolling process, in particular between cylinder rollers.
  • the corrugated tapes can then be inserted into the reshaped sections are used and two mirror-symmetrically arranged flat tube pieces can be connected to one another, in particular welded.
  • a large temperature spread of up to 1000 ° C. for example, it is possible to assemble the flat tube from flat tube pieces made of different materials.
  • Figs. 1 to 3 show a flat tube 2 for an in Figs. 1 to 3 Flat tube heat exchanger 1 (not shown) (cf. Figures 7-10 ) in a longitudinal section and in two cross sections along the section lines II-II and III-III according to Fig. 1 .
  • the flat tube 2 has two ends 21, 22 and a central section 20 lying between the two ends 21, 22.
  • a cross-section of the middle section 20 has a stadium shape with two parallel, flat flat sides 200 and two curved narrow sides 201 connecting the flat sides 200, in the embodiment shown, semicircular curved narrow sides 201 Cross section for a connection to collecting spaces of a housing of the flat tube heat exchanger 1, not shown, for example a circular cross section.
  • the two corrugated strips 3 have a sinusoidal wave shape.
  • the wave crests 30 and Wave troughs 31 are of the same shape.
  • the amplitudes of the corrugated strips 3 protruding upward in the plane of the drawing are referred to as wave peaks 30, whereby it would also be conceivable to designate the amplitudes protruding downward in the plane of the drawing as wave peaks.
  • the illustrated corrugated strips 3 each have a constant height and the corrugation peaks 30 and corrugation troughs 31 touch opposing inner surfaces of the flat sides 200 of the flat tubes 2.
  • a width of the corrugated strips 3 is approximately equal to a width of the flat sides 200.
  • the flat tube 2 shown is composed of two flat tube pieces 2a, 2b each extending in the longitudinal direction L.
  • the flat tube pieces 2a, 2b are arranged mirror-symmetrically and welded to one another along a weld seam 4.
  • the flat tube pieces 2a, 2b have at least essentially the same length.
  • the flat tube pieces 2a, 2b are manufactured from different materials in one embodiment, each flat tube piece 2a, 2b being able to be optimized for a temperature zone of an associated flat tube heat exchanger.
  • the flat tube pieces are welded to one another along a weld seam 4.
  • a corrugated tape 3 is provided in each of the flat tube pieces 2a, 2b, the wave shape of the corrugated tapes 3 being the same and the corrugated tapes 3 being arranged in alignment with one another.
  • the corrugated strips 3 arranged in the flat tube pieces 2a and 2b differ in terms of a wave shape or a number of waves.
  • a corrugated tape 3 is provided which extends over both flat tube pieces 2a, 2b.
  • Figures 4 to 6 show a tube bundle space 50 of a closed housing 5, shown only in sections, of a FIG Figures 4 to 6 Flat tube heat exchanger 1, not shown (cf. Figures 7-10 ) in a longitudinal section, in a plan view or in a cross section along a section line VI-VI according to Fig. 4 .
  • the illustrated tube bundle space 50 is cuboid.
  • the tube bundle comprises fifty flat tubes 2, which are arranged in ten rows, each comprising five flat tubes 2 arranged next to one another, the flat sides 200 of which lie in common planes.
  • the number of rows and the number of flat tubes 2 per row are exemplary; in other configurations, more or fewer rows are provided.
  • the ends 21, 22 of the flat tubes 2 are fastened in tube sheets 52.
  • corrugated tapes 3 are arranged as described above.
  • corrugated strips 6 are also provided between the rows of flat tubes 2, the wave crests 60 and troughs of which bear against the flat sides 200 of the flat tubes 2 on the outside.
  • the corrugated strips 6 arranged between the flat tubes 2 also have a sinusoidal wave shape in the exemplary embodiment shown.
  • a height of these corrugated tapes 6 corresponds at least approximately to a distance between two rows of the flat tubes 2.
  • the corrugated tapes 6 each extend over the entire row. In other configurations, two or more corrugated tapes are provided per row.
  • the housing 5 is subjected to surface pressure in the region of the tube bundle space 50.
  • the surface pressure is higher, in particular approx. 1 to 4 bar higher, than a pressure of the media guided in the flat tubes 2 or around the flat tubes 2.
  • the surface pressure ensures that contact between the corrugated strips 3, 6 and the flat tubes 2 on the inner and outer sides is maintained during operation without a material connection, in particular a welded or soldered connection, between the flat tubes 2 and the corrugated strips 3, 6 is necessary.
  • the surface pressure can be applied by a suitable device.
  • Figures 7 and 8 show a first embodiment of a flat tube heat exchanger 1 with a plurality of flat tubes 2 in a longitudinal section or in a cross section along a section line VIII-VIII according to FIG Fig. 7 , a housing 5 being surrounded by a jacket housing 7 designed as a pressure vessel.
  • the housing 5 has a tube bundle space 50, an inlet-side collecting space 54, an outlet-side collecting space 56 and two tube bundle space connections 58.
  • the tube bundle space 50 is separated from the collecting spaces 54, 56 by means of tube sheets 52.
  • the tube sheets 52 have connections for the schematically illustrated flat tubes 2, so that a medium fed to the inlet-side collecting space 54 can flow at a pressure p1 from the inlet-side collecting space 54 into the flat tubes 2 and from the flat tubes 2 into the outlet-side collecting space 56.
  • the flat tube heat exchanger 1 shown is preferably operated in countercurrent, with a medium guided around the flat tubes 2 at a pressure p2 via a medium in the
  • the tube bundle space connection 58 shown above is supplied to the plane of the drawing and flows from there into the tube bundle space 50.
  • the jacket housing 7 has a connection 72 for a media supply and / or media discharge, so that a pressure p in the jacket housing 7 can be regulated by means of media supply and / or media discharge.
  • the pressure p in the pressure chamber 70 of the jacket housing 7 designed as a pressure vessel is selected such that it is higher than the pressure p1, p2 of the media conducted in the flat tubes 2 or around the flat tubes 2, in particular approx. 1 bar to approx. 4 bar higher.
  • the housing 5 is subjected to a surface pressure from the outside, which ensures that the in Figures 7 and 8 corrugated tapes 3, 6 (not shown) (cf. Figs. 1 to 6 ) rest on the flat tubes 2 even without a material connection.
  • Figures 9 and 10 show a second embodiment of a flat tube heat exchanger 1 with a plurality of flat tubes 2 in a longitudinal section or a cross section along a section line XX according to FIG Fig. 9 .
  • the flat tube heat exchanger 1 shown is part of a system for thermal post-combustion (TNV) shown schematically, with contaminated air or an exhaust gas being fed to the flat tubes 2 via an inlet-side collecting chamber 54 and from there into a schematically shown combustion chamber 9.
  • the burned exhaust gas flows from the combustion chamber 9 into the tube bundle space 50 and is released to the environment via the tube bundle space connection 58.
  • the exhaust gas and the burned exhaust gas usually only flow into and around the flat tubes 2 at a moderate excess pressure.
  • FIG Figures 9 and 10 Corrugated tapes 3, 6 (not shown) (cf. Figs. 1 to 6 ), wherein a device for applying a surface pressure is provided on the housing 5 in order to ensure contact between the flat tubes and the corrugated strips 3, 6.
  • the housing 5 of the flat tube heat exchanger 1 is also surrounded by a jacket housing 7.
  • the pairs of bars 8 each include two bars 80 connected by means of tie rods 82.
  • spring elements are provided on tie rods 82, by means of which the bars 80 are braced with one another with a defined force.
  • adjusting elements in particular adjusting screws, which can be adjusted manually or by motor, are provided for this purpose as an alternative or in addition.
  • Surface pressure is applied to the jacket housing 7 by means of the pairs of bars 8. The application is transmitted to the housing 5.
  • pressure plungers 84 are arranged between the jacket housing 7 and the housing 5 and are designed to apply surface pressure uniformly to the housing 5.
  • the flat tubes 2 are in a rectangular arrangement. Therefore, a force application in a direction perpendicular to the direction of the rows of flat tubes 2 is sufficient to ensure contact between the flat tubes 2 and the corrugated strips 3 arranged therein and between the flat tubes 2 and the corrugated strips 6 arranged between the rows.
  • a device is provided by means of which forces acting in the radial direction of the ring arrangement can be applied.
  • thermal insulation 88 is provided between the housing 5 and the jacket housing 7.
  • the jacket housing 7 is dispensed with, with a surface pressure being applied directly to the housing 5 by means of the pairs of bars 8.
  • two corrugated strips 3 are arranged in each of the flat tubes 2 with corrugation peaks 30 and corrugation troughs aligned with one another.
  • Fig. 11 shows an alternative arrangement of corrugated strips 3 in a perspective illustration.
  • Fig. 11 When viewed in a longitudinal direction L, several corrugated strips 3 with corrugation peaks 30 and corrugation troughs 31 extending in the longitudinal direction L are arranged alternately in opposite directions.
  • the wave crests are 30 and Wave troughs 31 of successive corrugated strips 3 each phase shifted by 180 °.
  • transverse ribs 34 are arranged between successive corrugated strips 3.
  • Fig. 12 shows a flat tube 2 with the arrangement of corrugated strips 3 according to Fig. 11 in a cross section.
  • an arrangement of corrugated strips 3 in the flat tubes 2 and additionally also on the outside of the flat tubes 2 increases a transfer area for heat transfer and thus increases the efficiency of a flat tube heat exchanger 1.
  • Welding and / or soldering connections between the corrugated strips 3, 6 and the flat tubes 2 can be dispensed with by ensuring contact between the corrugated strips 3, 6 and the flat tubes 2 even during operation by applying surface pressure to a housing 5 of the flat tube heat exchanger 1 will.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP20178551.6A 2020-06-05 2020-06-05 Échangeur de chaleur tubulaire plan Active EP3919849B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20178551.6A EP3919849B1 (fr) 2020-06-05 2020-06-05 Échangeur de chaleur tubulaire plan
CN202180040506.3A CN115605719A (zh) 2020-06-05 2021-03-16 扁平管换热器
KR1020227043090A KR20230008198A (ko) 2020-06-05 2021-03-16 플랫 튜브 열교환기
JP2022574574A JP7564247B2 (ja) 2020-06-05 2021-03-16 扁平管熱交換器
US17/925,760 US20230175783A1 (en) 2020-06-05 2021-03-16 Flat tube heat exchanger
PCT/EP2021/056656 WO2021244783A1 (fr) 2020-06-05 2021-03-16 Échangeur de chaleur à tubes plats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20178551.6A EP3919849B1 (fr) 2020-06-05 2020-06-05 Échangeur de chaleur tubulaire plan

Publications (3)

Publication Number Publication Date
EP3919849A1 true EP3919849A1 (fr) 2021-12-08
EP3919849B1 EP3919849B1 (fr) 2024-02-14
EP3919849C0 EP3919849C0 (fr) 2024-02-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20178551.6A Active EP3919849B1 (fr) 2020-06-05 2020-06-05 Échangeur de chaleur tubulaire plan

Country Status (6)

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US (1) US20230175783A1 (fr)
EP (1) EP3919849B1 (fr)
JP (1) JP7564247B2 (fr)
KR (1) KR20230008198A (fr)
CN (1) CN115605719A (fr)
WO (1) WO2021244783A1 (fr)

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US3489209A (en) * 1968-12-23 1970-01-13 Herbert G Johnson Heat exchanger having plastic and metal components
DE3743293A1 (de) * 1987-12-19 1989-06-29 Laengerer & Reich Kuehler Flachrohr fuer waermeaustauscher
US20060124284A1 (en) * 2004-12-14 2006-06-15 Takeshi Ushio Heat exchanger
EP2584201A1 (fr) 2011-10-17 2013-04-24 LG Electronics, Inc. Ventilateur Sirocco et climatiseur le comportant
EP2584301A1 (fr) 2011-10-19 2013-04-24 WS-Wärmeprozesstechnik GmbH Caloporteur à température élevée

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WO2021244783A1 (fr) 2021-12-09
JP7564247B2 (ja) 2024-10-08
JP2023529632A (ja) 2023-07-11
CN115605719A (zh) 2023-01-13
KR20230008198A (ko) 2023-01-13
US20230175783A1 (en) 2023-06-08
EP3919849B1 (fr) 2024-02-14
EP3919849C0 (fr) 2024-02-14

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