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WO2019008007A1 - Segment coulé pour échangeur de chaleur sectionnel - Google Patents

Segment coulé pour échangeur de chaleur sectionnel Download PDF

Info

Publication number
WO2019008007A1
WO2019008007A1 PCT/EP2018/068028 EP2018068028W WO2019008007A1 WO 2019008007 A1 WO2019008007 A1 WO 2019008007A1 EP 2018068028 W EP2018068028 W EP 2018068028W WO 2019008007 A1 WO2019008007 A1 WO 2019008007A1
Authority
WO
WIPO (PCT)
Prior art keywords
cast
water
metal walls
segment
metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/068028
Other languages
English (en)
Inventor
Hasan TASHACORI
Gertjan Zwiggelaar
Mathieu VERHOOGT
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
Publication of WO2019008007A1 publication Critical patent/WO2019008007A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • 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
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F28D1/0478—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag 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
    • 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
    • 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
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of 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
    • 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
    • F28F13/08—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0219—Arrangements for sealing end plates into casing or header box; Header box sub-elements
    • F28F9/0221—Header boxes or end plates formed by stacked elements

Definitions

  • the invention relates to the technical field of cast segments for sectional heat
  • WO2015/024712A1 discloses a sectional heat exchanger built by assembling cast
  • the cast segments comprise two cast metal walls between which a meandering water channel is provided. At the outside, the two cast metal walls are provided with protrusions to increase heat transfer through the two cast metal walls.
  • the first aspect of the invention is a cast segment for a sectional heat exchanger.
  • the cast element comprises a combustion chamber for the generation of hot gas; a water flow channel for the flow of water to be heated; and two metal walls delimiting the water channel, for transferring heat between the hot gas and water flowing through the water flow channel.
  • the two metal walls are parallel to each other.
  • At least one of the two metal walls - and preferably both metal walls - comprise at their outside protrusions extending perpendicularly from the metal wall to increase heat transfer from the hot gas to water flowing in the water channel.
  • the protrusions can e.g. be pins and fins.
  • the water flow channel comprises a number of consecutive parallel straight segments.
  • Two consecutive parallel straight segments are separated by an intermediate wall connecting the two cast walls and by a U-turn.
  • one or a plurality of air gaps is provided having in their cross section parallel to the metal walls a triangular shape. Two sides of the triangular cross section are curved. The tip of the triangular cross section where the two curved sides of the triangular cross section join is provided at an intermediate wall of the water channel.
  • One or a plurality of the air gaps comprises an insertion, integrally cast with the cast segment. The insertion extends from at the intermediate wall of the water channel into the air gap. At least one of the insertions comprises a drilled hole with screw thread for the fixation of a hoisting eye. More preferably, a plurality of insertions comprise a drilled hole with screw thread for the fixation of a hoisting eye.
  • a hoisting eye can be easily screwed into the insertion, facilitating the possibility to hoist the cast segment, and facilitating the possibility to hoist a sectional heat exchanger assembled with such cast segments, by means of appropriate hoisting equipment.
  • the insertion provides the required reinforcement for the fixation of a hoisting eye and for coping with the force when lifting the cast segment or the sectional heat exchanger at the hoisting eyes.
  • sectional heat exchanger hot combustion gas will flow along the metal walls at the air gaps.
  • the presence of the insertion has the benefit that heat from the hot gas is better transferred to the water channel while preventing that the metal walls get too got. Therefore, sectional heat exchangers are provided having better efficiency. It is a further benefit that the insertion provides a reinforcement, into which a hoisting eye can be fixed.
  • the insertion extends over the full distance between the two metal walls.
  • the insertion divides the air gap in two distinct open volumes.
  • the insertion extends up to the side edges of the two metal walls.
  • the insertion in the direction parallel with the two metal walls and away from the combustion chamber the insertion has a maximum height less than 40 mm, preferably less than 36 mm.
  • At least one of the two metal walls - and preferably both metal walls - comprise at their outside protrusions extending perpendicularly from the metal wall in order to increase heat transfer from the hot gas to the metal wall.
  • the protrusions can e.g. be pins or fins.
  • the protrusions will extend in the hot gas channel once the cast segment is assembled in a sectional heat exchanger, in order to increase heat transfer from the hot gas generated in the combustion chamber to the water flowing through the water flow channel.
  • at least one and preferably both metal walls comprise protrusions located at the air gap; the protrusions are provided to extend in the flue gas channel of the sectional heat exchanger comprising the cast segment.
  • both side edges of the cast segment comprise at least one air gap provided with an insertion extending from at the intermediate wall of the water channel into the air gap.
  • the cast segment comprises one or a plurality of first intermediate walls.
  • Each first intermediate wall is provided between two consecutive parallel straight segments of the water channel.
  • Each first intermediate wall connects the two metal walls.
  • At least one - and preferably a plurality of - first intermediate walls extend up to the side edges of the two metal walls. In such embodiments, no air gaps are present at the first intermediate walls. More preferably, at least one - and even more preferably a plurality of - first intermediate walls are provided in hot gas flow direction downstream from intermediate walls at air gaps.
  • a preferred cast segment is a mono-cast, also called a monobloc. It is meant that the cast segment is integrally cast in one casting operation.
  • the cast segment is cast out of aluminum or an aluminum alloy.
  • At least one side of the cast segment is provided with at least one insertion without drilled hole. It is meant that the insertion is massive.
  • a second aspect of the invention is a sectional heat exchanger comprising a plurality of cast segments as in any embodiment of the first aspect of the invention.
  • the cast segments are assembled parallel to each other.
  • the combination of the combustion chambers of each of the cast segments provides a chamber for the installation of a burner for the generation of hot gas.
  • a third aspect of the invention is a heat cell.
  • the heat cell comprises a sectional heat exchanger as in the second aspect of the invention.
  • a burner - preferably a surface stabilized fully premixed gas burner - is provided in the chamber for installation of a burner.
  • Figures 1 and 2 show a cast segment according to the invention.
  • Figures 1 and 2 show a cast segment according to the invention.
  • Figure 1 shows a front view 100 of the cast segment.
  • the view on the other side of the cast segment is similar when the cast segment is a cast segment for an intermediate section of a sectional heat exchanger.
  • the other side is different, as at the other side, in the heat exchanger no flue gas will flow along the segment; and thus normally no protrusions for increasing heat transfer will be provided at that side.
  • Figure 2 shows a cross section 200 through the cast segment.
  • the exemplary cast segment is cast in one single casting operation out of an appropriate aluminium alloy; and is thus a monobloc or monocast.
  • the cast segment comprises a combustion chamber 102, 202 for the generation of hot gas; a water flow channel 204 for the flow of water to be heated ; and two metal walls 105 delimiting the water channel, for transferring heat between the hot gas and water flowing through the water flow channel.
  • the two metal walls 105 comprise at their outside protrusions 107, 108 extending perpendicularly from the metal wall to increase heat transfer from the hot gas to water flowing in the water channel.
  • the segment is an end or a front segment, preferably only one side (the side facing a channel through which hot gas flows) comprises such protrusions.
  • the protrusions can be pins 107 and/or fins 108.
  • the water flow channel 204 comprises a number of consecutive parallel straight
  • a plurality of air gaps 215 are provided having in their cross section parallel to the metal walls a triangular shape, two sides of the triangular cross section being curved. The curves correspond with the U-turn of the water flow channel.
  • the tip 216 of the triangular cross section where the two curved sides of the triangular cross section join, is provided at an intermediate wall of the water channel.
  • a plurality of air gaps 215 comprise an insertion 217, 218, integrally cast with the cast segment.
  • the insertion extends from at the intermediate wall of the water channel into the air gap. In the example, the insertions extend over the full distance between the two metal walls.
  • the insertions divide each air gap in two distinct open volumes. The insertions extend up to the side edges of the two metal walls. In the direction parallel with the two metal walls and away from the combustion chamber the insertion has a maximum height 35 mm.
  • one of the insertions 217 is provided with a drilled hole 220 with screw thread for the fixation of a hoisting eye.
  • Cast segments for intermediate sections of a sectional heat exchanger comprise at the air gap, on both metal walls, at their outside pins extending perpendicularly from the metal wall in order to increase heat transfer from the hot gas to the metal wall.
  • the cast segment comprises a plurality of first intermediate walls 224 provided in hot gas flow direction downstream from intermediate walls at air gaps.
  • Each first intermediate wall is provided between two consecutive parallel straight segments of the water channel and each first intermediate wall connects the two metal walls.
  • the first intermediate walls extend up to the side edges of the two metal walls. It is meant that at the first intermediate walls, no air gap is provided.

Landscapes

  • 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)
  • Geometry (AREA)
  • Details Of Fluid Heaters (AREA)

Abstract

L'invention concerne un segment coulé destiné à un échangeur de chaleur sectionnel, comprenant une chambre de combustion, destinée à la production de gaz chaud ; un canal d'écoulement d'eau, destiné à l'écoulement d'eau à chauffer ; et deux parois métalliques délimitant le canal d'eau, destinées au transfert de chaleur entre le gaz chaud et l'eau s'écoulant à travers le canal d'écoulement d'eau. Au moins l'une des deux parois métalliques comprend, au niveau de sa partie extérieure, des saillies s'étendant perpendiculairement à partir de la paroi métallique pour augmenter le transfert de chaleur du gaz chaud à l'eau s'écoulant dans le canal d'eau. Le canal d'écoulement d'eau comprend plusieurs segments droits parallèles consécutifs. Deux segments droits parallèles consécutifs sont séparés par une paroi intermédiaire, reliant les deux parois coulées ; et par un coude en U. Entre les deux parois métalliques, à l'extérieur du canal d'eau, on trouve un ou plusieurs intervalles d'air présentant, dans leur section transversale parallèle aux parois métalliques, une forme triangulaire, deux côtés de la section transversale triangulaire étant incurvés. La pointe de la section transversale triangulaire, où se rejoignent les deux côtés incurvés de la section transversale triangulaire, est disposée au niveau d'une paroi intermédiaire du canal d'eau. Un ou plusieurs intervalles d'air comprennent une insertion, coulée d'un seul bloc avec le segment coulé. L'insertion s'étend de la paroi intermédiaire du canal d'eau à l'intervalle d'air. L'insertion comprend un trou foré à filetage, destiné à la fixation d'un œillet de levage.
PCT/EP2018/068028 2017-07-07 2018-07-04 Segment coulé pour échangeur de chaleur sectionnel Ceased WO2019008007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17180254.9 2017-07-07
EP17180254 2017-07-07

Publications (1)

Publication Number Publication Date
WO2019008007A1 true WO2019008007A1 (fr) 2019-01-10

Family

ID=59313045

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/068028 Ceased WO2019008007A1 (fr) 2017-07-07 2018-07-04 Segment coulé pour échangeur de chaleur sectionnel

Country Status (1)

Country Link
WO (1) WO2019008007A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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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