EP3425301A1 - Élément d'échangeur de chaleur - Google Patents

Élément d'échangeur de chaleur Download PDF

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Publication number
EP3425301A1
EP3425301A1 EP17180239.0A EP17180239A EP3425301A1 EP 3425301 A1 EP3425301 A1 EP 3425301A1 EP 17180239 A EP17180239 A EP 17180239A EP 3425301 A1 EP3425301 A1 EP 3425301A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
water
intermediate wall
water flow
straight segments
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Withdrawn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
EP17180239.0A
Other languages
German (de)
English (en)
Inventor
Parsa TASHACORI
Mr. Gertjan ZWIGGELAAR
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.)
Bekaert Combustion Technology BV
Original Assignee
Bekaert Combustion Technology BV
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 Bekaert Combustion Technology BV filed Critical Bekaert Combustion Technology BV
Priority to EP17180239.0A priority Critical patent/EP3425301A1/fr
Publication of EP3425301A1 publication Critical patent/EP3425301A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0015—Guiding means in water channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/30—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle being built up from sections
    • F24H1/32—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle being built up from sections with vertical sections arranged side by side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • 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
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0007—Water heaters
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0081—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by a single plate-like element ; the conduits for one heat-exchange medium being integrated in one single plate-like 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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/022—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being wires or pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28F2255/14—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes molded

Definitions

  • the invention relates to the field of heat exchanger elements and heat exchangers.
  • WO2015/024712A1 discloses a heat exchanger element comprising a combustion chamber for the generation of hot gas, a meandering water flow channel for the flow of water to be heated; and two metal walls delimiting the water flow channel, for exchanging heat between the hot gas and water flowing through the water flow channel.
  • the water flow channel is provided for water flow in counter direction to the flow of hot gas.
  • the water flow channel comprises a number of consecutive parallel straight segments.
  • the water flow channel comprises U-turns connecting two consecutive straight segments separated by an intermediate wall.
  • the first aspect of the invention is a heat exchanger element.
  • the heat exchanger element comprises a combustion chamber for the generation of hot gas; a meandering water flow channel for the flow of water to be heated; and two metal walls delimiting the water flow channel, for exchanging heat between the hot gas and water flowing through the water flow channel.
  • the water flow channel is provided for water flow in counter direction to the flow of hot gas.
  • the water flow channel comprises a number of consecutive parallel straight segments.
  • the water flow channel comprises at least three U-turns which are each connecting two consecutive straight segments separated by an intermediate wall. At least one of the intermediate walls has one or a plurality of through openings. The through openings are provided to create a short cut for the water flow in the water flow channel.
  • the at least one through opening creates a short cut for the water flow in the meandering water flow channel.
  • the short cut reduces the pressure drop in the water flow channel. Therefore, the pump provided in the heating circuit comprising a heat cell which comprises the inventive heat exchanger element for the circulation of the water consumes less energy.
  • the benefit is that a heat cell comprising the heat exchanger elements is more energy efficient.
  • the heat exchanger element is a cast heat exchanger element, more preferably provided out of aluminum or out of an aluminum alloy.
  • the intermediate wall separating two consecutive parallel straight segments of the water flow channel is a metal wall common to the two consecutive parallel straight segments. More preferably, the intermediate wall is integrally cast with the heat exchanger element.
  • a preferred heat exchanger element comprises a most upstream intermediate wall.
  • the most upstream intermediate wall is the intermediate wall separating the two consecutive parallel straight segments of the water channel most upstream of the water flow channel.
  • the two most upstream consecutive parallel straight segments are connected by a U-turn.
  • the most upstream intermediate wall comprises at least one - and preferably a plurality of - through openings.
  • a preferred heat exchanger element comprises a second most upstream intermediate wall.
  • the second most upstream intermediate wall separates two consecutive parallel straight segments of the water channel that are connected by a U-turn. One of the two consecutive parallel straight segments is one of the two consecutive parallel straight segments separated by the most upstream intermediate wall.
  • the second most upstream intermediate wall comprises at least one - and preferably a plurality of - through openings.
  • a preferred heat exchanger element comprises a non-interrupted intermediate wall.
  • the non-interrupted intermediate wall separates two consecutive parallel straight segments of the water channel that are connected by a U-turn.
  • non-interrupted intermediate wall is meant that the intermediate wall does not comprise openings that would provide a short-cut for water flow.
  • a preferred heat exchanger element comprises at least two non-interrupted intermediate walls.
  • the non-interrupted intermediate walls each separate two consecutive parallel straight segments of the water channel that are connected by a U-turn.
  • the one or the plurality of through openings is/are opening(s) provided over the full height of the intermediate wall.
  • the full height of the intermediate wall is meant the full distance between the two metal walls delimiting the water flow channel.
  • a curved baffle is provided in at least one U-turn.
  • the curved baffle is provided parallel with and corresponding with the contour of the wall of at least part of the U-turn.
  • the curved baffle provides a synergistic benefit, in that the through openings - establishing the short-cut openings - cooperate and interact with the curved baffles to create efficient water distribution at the baffle; improving the performance of the heat exchanger element.
  • U-turns comprise reinforcing pins extending from wall to wall of the water channel.
  • the reinforcing pins in the U-turns can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the parallel straight segments separated by an intermediate wall and by a U-turn comprise reinforcing pins extending from wall to wall of the water channel.
  • the reinforcing pins in the parallel straight segments can e.g. be cylindrical in cross section, or can e.g. have a drop shaped cross section, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the heat exchanger element is provided as a section for parallel side by side assembly in a sectional heat exchanger.
  • the second aspect of the invention is a sectional heat exchanger comprising a plurality of heat exchanger elements as in any embodiment of the first aspect of the invention.
  • the heat exchanger elements are assembled side by side such that the at least one water channel of each of the heat exchanger elements are connected in parallel flow connection.
  • a preferred sectional heat exchanger comprises a chamber for the generation of flue gas. More preferably, the chamber in the sectional heat exchanger is provided by the combination of the combustion chambers of the heat exchanger elements.
  • the third aspect of the invention is a heat cell comprising a sectional heat exchanger as in the second aspect of the invention and a burner.
  • the burner is provided in the chamber for the generation of hot gas of the sectional heat exchanger.
  • the burner is a fully premixed surface stabilized premix gas burner.
  • Figure 1 shows a cross section of a heat exchanger element according to the invention.
  • Figure 2 shows the heat exchanger element, of which the cross section is shown in figure 1 .
  • FIG 1 shows a cross section 100 of a heat exchanger element according to the invention.
  • Figure 2 shows the heat exchanger element 200, of which the cross section is shown in figure 1 .
  • the heat exchanger element is a cast heat exchanger element, integrally cast out of aluminum.
  • the heat exchanger element is provided as a section for parallel side by side assembly in a sectional heat exchanger.
  • the heat exchanger element comprises a combustion chamber 102 for the generation of hot gas; a meandering water flow channel 104 for the flow of water to be heated; and two metal walls 105 delimiting the water flow channel, for exchanging heat between the hot gas and water flowing through the water flow channel.
  • the cross section of figure 1 is taken at the middle between the two metal walls of the heat exchanger element.
  • the metal walls 105 comprise at their outside pins 136 and ribs 138 that will extend in the flue gas channel of the heat exchanger in which the heat exchanger elements is assembled.
  • the pins and ribs are provided to increase heat exchanger from the flue gas to the water flowing through the meandering water flow channel.
  • the water flow channel is provided for water flow in counter direction to the flow of hot gas.
  • the water flow channel comprises a number of consecutive parallel straight segments 108.
  • the water flow channel comprises at least three U-turns 110, each connecting two consecutive straight segments separated by an intermediate wall 112.
  • the intermediate walls 112 are metal walls each common to the two consecutive parallel straight segments they separate. The intermediate walls are integrally cast with the heat exchanger element.
  • the heat exchanger element comprises a most upstream intermediate wall 114.
  • the most upstream intermediate wall is the intermediate wall separating the two consecutive parallel straight segments of the water channel most upstream of the water flow channel.
  • the two most upstream consecutive parallel straight segments are connected by a U-turn.
  • the most upstream intermediate wall comprises a plurality of through openings 116. The through openings are provided to create a short cut for the water flow in the water flow channel.
  • the heat exchanger element comprises a second most upstream intermediate wall 118.
  • the second most upstream intermediate wall separates two consecutive parallel straight segments of the water channel that are connected by a U-turn. One of the two consecutive parallel straight segments is one of the two consecutive parallel straight segments separated by the most upstream intermediate wall.
  • the second most upstream intermediate wall comprises a plurality of through openings 120.
  • the through openings 116, 120 are openings provided over the full height of the intermediate wall.
  • the full height of the intermediate wall is meant the full distance between the two metal walls delimiting the water flow channel.
  • the heat exchanger element also comprises non-interrupted intermediate walls 122, 124.
  • the non-interrupted intermediate walls each separate two consecutive parallel straight segments of the water channel that are connected by a U-turn.
  • non-interrupted intermediate wall is meant that the intermediate wall does not comprise openings that would provide a short-cut for water flow.
  • Some of the U-turns comprise a curved baffle 126 parallel with and corresponding with the contour of the wall of at least part of the U-turn.
  • the U-turns comprise reinforcing pins 128, 130 extending from wall to wall of the water channel.
  • Some of the reinforcing pins in the U-turns can e.g. be cylindrical in cross section128 or can e.g. have a drop shaped cross section 130, wherein the drop shape is aligned with the flow direction of the water in the water channel.
  • the parallel straight segments separated by an intermediate wall and by a U-turn comprise reinforcing pins 132, 134 extending from wall to wall of the water channel.
  • Some of the reinforcing pins in the parallel straight segments have a cylindrical in cross section 132; other reinforcing pins have a drop shaped cross section 134. The drop shape is aligned with the flow direction of the water in the water channel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP17180239.0A 2017-07-07 2017-07-07 Élément d'échangeur de chaleur Withdrawn EP3425301A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17180239.0A EP3425301A1 (fr) 2017-07-07 2017-07-07 Élément d'échangeur de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17180239.0A EP3425301A1 (fr) 2017-07-07 2017-07-07 Élément d'échangeur de chaleur

Publications (1)

Publication Number Publication Date
EP3425301A1 true EP3425301A1 (fr) 2019-01-09

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17180239.0A Withdrawn EP3425301A1 (fr) 2017-07-07 2017-07-07 Élément d'échangeur de chaleur

Country Status (1)

Country Link
EP (1) EP3425301A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1028298A1 (fr) * 1999-02-10 2000-08-16 Holding J.H. Deckers N.V. Appareil de chauffage avec echangeur de chaleur coulé et integré
DE69801631T2 (de) * 1997-10-31 2002-06-27 De Dietrich Thermique, Niederbronn-Les-Bains Wärmetauscherelement mit hohem Wirkungsgrad für einen Heizkörper in einem Gliederheizkessel
WO2015024712A1 (fr) 2013-08-20 2015-02-26 Bekaert Combustion Technology B.V. Échangeur de chaleur sectionnel devant être utilisé dans une cellule thermique
EP3173722A1 (fr) * 2015-11-25 2017-05-31 Daikin Industries, Ltd. Echangeur de chaleur

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69801631T2 (de) * 1997-10-31 2002-06-27 De Dietrich Thermique, Niederbronn-Les-Bains Wärmetauscherelement mit hohem Wirkungsgrad für einen Heizkörper in einem Gliederheizkessel
EP1028298A1 (fr) * 1999-02-10 2000-08-16 Holding J.H. Deckers N.V. Appareil de chauffage avec echangeur de chaleur coulé et integré
WO2015024712A1 (fr) 2013-08-20 2015-02-26 Bekaert Combustion Technology B.V. Échangeur de chaleur sectionnel devant être utilisé dans une cellule thermique
EP3173722A1 (fr) * 2015-11-25 2017-05-31 Daikin Industries, Ltd. Echangeur de chaleur

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