EP1824623A1 - Procede de fabrication d'echangeur de chaleur et systeme d'execution de ce procede - Google Patents

Procede de fabrication d'echangeur de chaleur et systeme d'execution de ce procede

Info

Publication number
EP1824623A1
EP1824623A1 EP05804660A EP05804660A EP1824623A1 EP 1824623 A1 EP1824623 A1 EP 1824623A1 EP 05804660 A EP05804660 A EP 05804660A EP 05804660 A EP05804660 A EP 05804660A EP 1824623 A1 EP1824623 A1 EP 1824623A1
Authority
EP
European Patent Office
Prior art keywords
tubing
sheet metal
metal plate
plate
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.)
Withdrawn
Application number
EP05804660A
Other languages
German (de)
English (en)
Inventor
Göran Hultmark
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.)
Sunstrip AB
Original Assignee
Sunstrip AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sunstrip AB filed Critical Sunstrip AB
Publication of EP1824623A1 publication Critical patent/EP1824623A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F28F1/14—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 extending longitudinally
    • F28F1/22—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 extending longitudinally the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
    • F24S10/753—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations the conduits being parallel to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • B21D11/07—Making serpentine-shaped articles by bending essentially in one plane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/242—Fillet welding, i.e. involving a weld of substantially triangular cross section joining two parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
    • F24S10/755—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations the conduits being otherwise bent, e.g. zig-zag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/06—Fastening; Joining by welding
    • F28F2275/067—Fastening; Joining by welding by laser welding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/44—Heat exchange systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49364—Tube joined to flat sheet longitudinally, i.e., tube sheet

Definitions

  • the present patent application relates to method for manufacturing a heat- exchanger and in particular a heat-exchanger suitable for energy transfer between a plate and a fluid circuit in accordance with the preamble of claim 1.
  • thermal solar collectors can e.g. be based on the principle of letting the sun irradiate a dedicated surface in order to be absorbed by and heat that surface and thereafter transferring the heat from that surface to a fluid medium, facilitating transport of the heat to a desired location.
  • heat exchangers and in particular heat exchangers suitable for energy absorption in solar energy systems.
  • tubing for heat transfer is provided on a fairly large homogeneous absorber plate.
  • the tubing is usually provided as a continuous loop attached to the absorber plate in accordance with a predetermined pattern.
  • the skeletal tubing structure is usually very instable and requires a substantial working surface in the workshop for its preparation. Due to the instability of the skeletal tubing structure the work of correctly positioning the skeletal tubing structure on the homogeneous absorber plate is usually quite cumbersome and time consuming. The instability in combination with residual stress in the skeletal tubing structure also makes it virtually impossible to achieve a close to one hundred percent contact between the tubing and the homogeneous absorber plate, which of course has a negative effect on the heat transfer capability of the heat exchangers manufactured in accordance with this known method.
  • One object of the invention is to provide a method for manufacturing a heat- exchanger, and in particular a heat-exchanger suitable for energy transfer between a plate and a fluid circuit, the method providing for eliminating or reducing one or more of the problems described above.
  • FIG. 1 is a schematic illustration of a system for manufacturing a heat-exchanger in accordance with the method of the present invention
  • FIG. 2 is a schematic illustration of the means for performing the step of instantaneous application, positioning and affixing of the metal tubing to the sheet metal plate in accordance with the method of the present invention
  • FIG. 3 illustrates schematically the means for performing the step of providing the metal tubing with bends for forming a predetermined circuit pattern during the successive application of the tubing to said sheet metal plate in accordance with the method of the present invention.
  • FIG. 1 A schematic illustration of a system for manufacturing a heat-exchanger in accordance with the method of the present invention is illustrated in figure 1.
  • the system comprises a storage 1 of sheet metal plates 2 of a predetermined size.
  • a handling system 3 such as a pre-programmed robotic handling system, is provided for handling the sheet metal plates 2.
  • any suitable handling system could be used, including manual handling of the sheet metal plates 2.
  • the handling system 3 is arranged to take one sheet metal plate 2 from the storage 1 and transfer it to an alignment unit 4, where the sheet metal plate 2 will be released and positioned in a pre-determined well defined position. Once the sheet metal plate 2 has taken the pre-determined well defined position, the handling system 3 will once again take the sheet metal plate 2 and transfer it to a plane working table 5. Due to the alignment step, exact positioning on the plane working table 5 is greatly facilitated. The sheet metal plate 2 will thereafter be fixed in a working position on the plane working table 5. The sheet metal plate 2 is preferable fixed to the plane working table 5 using vacuum suction, whereby the sheet metal plate 2 is brought into close contact with the plane working table 5, thus providing an essentially plane working surface on the sheet metal plate 2.
  • a predetermined length of continuous metal tubing 6 is prepared in a sequence of steps which includes, straightening the metal tubing 6, cutting the metal tubing 6 to the predetermined length required for the finalized product and winding the predetermined length of metal tubing upon a spool 7.
  • the tubing 6 is provided for carrying a fluid medium for transferring the heat from the sheet metal absorber plate 2 to e.g. a domestic heating system.
  • the preferred fluid medium for these kinds of systems is usually water.
  • the water used need to be of a certain quality.
  • an anti-freezing liquid shall also be added to the water.
  • the anti-freezing liquid may be glycol or glycol with corrosion inhibitors.
  • a tubing application unit 8 e.g. carried by a second pre-programmed robotic system 9, will thereafter be provided with the spool 7 containing the predetermined length of continuous metal tubing 6.
  • tubing 6 could be fed directly from the coil (not shown) to the tubing application unit 8, which could comprise means for performing the above steps of straightening the metal tubing 6 prior to application and cutting the metal tubing 6 to the predetermined length required for the finalized product.
  • the working table 5 carrying the sheet metal plate 2 will be moved in the direction of the dotted arrows 17 and into the operating reach of the second pre-programmed robotic system 9 carrying the tubing application unit 8.
  • the tubing application unit 8 is arranged for successively applying the length of metal tubing 6 to the sheet metal plate 2.
  • the tubing 6 is fed in the direction of arrow 10 towards a predetermined position on the sheet metal 2 plate via a truing device, e.g. consisting of a number of rolls 11.
  • a truing device e.g. consisting of a number of rolls 11.
  • the metal tubing 6 is brought into close contact with the sheet metal plate 2, e.g. by pressing the metal tubing 6 towards the sheet metal 2 plate using at least one guide wheel 12.
  • the tubing 6 brought into close contact with the sheet metal plate 2 is then instantaneously affixed to the sheet metal plate 2.
  • affixing is effected through welding the metal tubing 6 to the sheet metal plate 2.
  • Laser welding is the preferred method of joining. Laser welding is particularly suited for the production in large volumes of the full plate absorber heat exchanger.
  • Welds 13 are suitably provided at both sides of the tubing 6 simultaneously during the welding operation. As the tubing 6 only needs to be brought into close contact with the sheet metal plate 2 at the weld point itself, the entire complex of tolerance problems is restricted to one point.
  • the sun irradiates the absorber plate 2, where the thermal energy of the sun is absorbed and transported by the plate 2 towards a weld 13.
  • the thermal energy is led through the weld 13 and into the tubing 6, why the ability of the weld 13 to transfer thermal energy is critical. Thereafter the thermal energy will be transferred to a fluid medium circulating in the tubing 6 and utilized for transporting the thermal energy to a different location.
  • the thermal energy will be transferred to a fluid medium circulating in the tubing 6 and utilized for transporting the thermal energy to a different location. It will be obvious for the person skilled in the art that the same applies in the inverse direction, i.e. where the thermal energy of a fluid medium circulating in the tubing 6 is transferred to the tubing 6 and via the welds 13 to a plate 2 arranged to emit thermal energy to its surroundings.
  • the full plate absorber heat-exchanger is engineered through laser welding of copper tubing 6 on to a homogeneous absorber plate 2, preferably an aluminum or copper sheet metal plate 2.
  • a homogeneous absorber plate 2 preferably an aluminum or copper sheet metal plate 2.
  • the method in accordance with the present invention also allows for a very high extent of flexibility when it comes to the design of the absorber.
  • the copper tube 6 is preferably welded to the backside of the absorber plate 2, leaving a smooth surface and an essentially uniform color on the visible side of the absorber. Laser welding produces an essentially homogenous color tone and flat absorber surface that complies with the stringent aesthetic demands and at the same time provides superior performance.
  • the visible side of the absorber metal plate 2 is preferably pre-coated with a multi-layer selective surface.
  • the multi-layer selective coating is preferably deposited on an anodized aluminum substrate using the Physical Vapor Deposition technique (PVD).
  • PVD Physical Vapor Deposition technique
  • IR infrared
  • Oxide layers on the top are optimized for a very high solar absorption coefficient ( ⁇ ) and resistance against environmental influences. This surface often has a blue color tone.
  • a copper plate 2 it is coated through a magnetron sputtering process.
  • a reactive process is used to produce a CERMET multi-layer coating with a graded refractive index, where very small metallic particles are dispersed in an amorphous dielectric matrix. The metal content is decreasing to the upper layers. Absorption is achieved by scattering effects at the metallic particles and the surrounding dielectric matrix.
  • multi-layer thin films use interference effects between semi-transparent layers to trap energy. Therefore an antireflection coating is applied on the surface of the layer stack, which also has the function of a protective film.
  • a special metallic coating is applied to the top of the substrate as a barrier layer to prevent corrosion of the substrate and diffusion of the substrate material into the upper layers, which enhances the durability of the coating drastically. At the same time it promotes the adhesion of the subsequent deposited layers.
  • the metal tubing 6 is arranged to be fed in the direction of arrow 10 and successively applied and affixed to the sheet metal plate 2 and provided with bends in order to form a predetermined circuit pattern upon the sheet metal plate 2.
  • the circuit pattern can be optimized to provide maximum efficiency in heat transfer.
  • the tubing application unit 8 includes means for feeding the tubing 6, the truing device (e.g. the rolls 11), the means (e.g. guide wheel 12) for bringing the tubing 6 into close contact with the sheet metal plate 2, the means (e.g. the lasers 14) for affixing the tubing 6 to the sheet metal plate 2 as well as means 15 for providing the tube bends, all of which are arranged at one and the same tool which is carried by a pre-programmed robotic system 9, why no exchange of tools is necessary during the application process.
  • the robotic system 9 provides for highly accurate positioning when applying and affixing the tubing 6 circuit to the sheet metal absorber plate 2.
  • the robotic system 9 also provides the means for exactly controlling the forming of the tube bends and the forming of the predetermined circuit pattern upon the sheet metal plate 2.
  • positioning of the points of impact of the laser beams 18 is suitably achieved through the application unit 8 "floating" on the surface of the working table 5, independent of the vertical positioning of the robotic system 9 carrying the application tool.
  • targeting is independent of the positioning accuracy of the robotic system 9 or how plane the underlying working surface is. It will be obvious for the person skilled in the art that other height sensing methods can be used for positioning of the points of impact of the laser beams 18 emitted by the lasers 14.
  • the metal tubing 6 is provided with bends for forming the predetermined circuit pattern.
  • these tube bends are formed using bending rolls 15.
  • These bending rolls 15 for forming the tube bends preferably consists of a pair of bending rolls 15 arranged to be positioned one bending roll 15 on each side of the metal tubing 6 and arranged to force the tubing 6 to form the bends through the pair of bending rolls 15 being continuously repositioned with respect to the sheet metal plate 2 during the successive application of the tubing 6.
  • a bend is provided as the robotic system 9 turns the tubing application unit 8 in order to apply tubing 6 in a new direction.
  • the tubing section preceding the bend must first have been affixed to the plate 2, e.g. through welding.
  • the affixing e.g. welding
  • the pair of bending rolls 15 are positioned one on each side of the tubing 6.
  • the pair of bending rolls 15 are continuously repositioned as the tubing application unit 8 is being repositioned by the pre-programmed robotic system 9, thus creating the bend.
  • the sheet metal plate 2 is removed from the working table 5 by the handling system 3 taking it and at the same time releasing the vacuum suctjon.
  • the finalized heat-exchanger is thereafter transferred to a storage area (not shown) for finalized products awaiting transfer to another location for integration into a complete heating system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Optics & Photonics (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Plasma & Fusion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un échangeur de chaleur, et en particulier, d'un échangeur de chaleur qui transfère l'énergie entre une plaque et un circuit fluide. Une plaque de tôle (2) et un tube métallique (6) de longueur prédéterminée sont fabriqués. Le tube métallique (6) de longueur prédéterminée est appliqué en continu sur la plaque de tôle (2). Cette application consiste à amener le tube métallique (6) en contact étroit avec la plaque de tôle (2), et à fixer le tube métallique (6) sur la plaque (2), de préférence par soudage par faisceau laser.
EP05804660A 2004-12-13 2005-11-25 Procede de fabrication d'echangeur de chaleur et systeme d'execution de ce procede Withdrawn EP1824623A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0403031A SE527717C2 (sv) 2004-12-13 2004-12-13 Metod för tillverkning av en värmeväxlare och ett system för utförande av metodend
PCT/SE2005/001775 WO2006065195A1 (fr) 2004-12-13 2005-11-25 Procede de fabrication d'echangeur de chaleur et systeme d'execution de ce procede

Publications (1)

Publication Number Publication Date
EP1824623A1 true EP1824623A1 (fr) 2007-08-29

Family

ID=33563198

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05804660A Withdrawn EP1824623A1 (fr) 2004-12-13 2005-11-25 Procede de fabrication d'echangeur de chaleur et systeme d'execution de ce procede

Country Status (5)

Country Link
US (1) US20080086884A1 (fr)
EP (1) EP1824623A1 (fr)
CN (1) CN100453255C (fr)
SE (1) SE527717C2 (fr)
WO (1) WO2006065195A1 (fr)

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Also Published As

Publication number Publication date
CN100453255C (zh) 2009-01-21
CN101076413A (zh) 2007-11-21
US20080086884A1 (en) 2008-04-17
WO2006065195A1 (fr) 2006-06-22
SE0403031L (sv) 2006-05-23
SE0403031D0 (sv) 2004-12-13
SE527717C2 (sv) 2006-05-23

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