EP0581663A1 - Wärmetauscher mit ringförmig angeordneten Wasserrohren, insbesondere für Brennwertkessel - Google Patents

Wärmetauscher mit ringförmig angeordneten Wasserrohren, insbesondere für Brennwertkessel Download PDF

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Publication number
EP0581663A1
EP0581663A1 EP93401933A EP93401933A EP0581663A1 EP 0581663 A1 EP0581663 A1 EP 0581663A1 EP 93401933 A EP93401933 A EP 93401933A EP 93401933 A EP93401933 A EP 93401933A EP 0581663 A1 EP0581663 A1 EP 0581663A1
Authority
EP
European Patent Office
Prior art keywords
tubes
water
ring
separator
sector
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Withdrawn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
EP93401933A
Other languages
English (en)
French (fr)
Inventor
Michel Chapuis
Jean-Louis Armand
Yves Ledu
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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 Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Publication of EP0581663A1 publication Critical patent/EP0581663A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner
    • 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
    • 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
    • F28D7/1669—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 an annular shape; the conduits being assembled around a central distribution tube
    • 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
    • F28D7/1692—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 with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • 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
    • F28F9/0202—Header boxes having their inner space divided by partitions
    • 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

Definitions

  • the invention which relates to a heat exchanger, in particular for a condensing boiler, relates more precisely to the distribution of the flow rates inside the sheet of water tubes which constitute the cylindrical exchanger.
  • the cylindrical exchangers of condensing type boilers are usually produced in the form of a sheet of water tubes which are distributed vertically - evenly - around a central burner and which define a combustion chamber.
  • the cylindrical sheet is wrapped in a sealed shell intended to collect the combustion products which are evacuated through a chimney.
  • This arrangement allows partial or total recovery of the latent heat of condensation of the water vapor contained in the combustion gases, thanks to the large exchange surfaces provided between the water tubes and these gases. These exchange surfaces result from a particular profile of each water tube, advantageously of oblong section and fairly flattened.
  • the heating water circulates in the tubes of the sheet, going up by a few neighboring tubes forming a bundle, then going down by a neighboring bundle, and so on.
  • the baffles in question constitute partitions between the sectors and they must be sufficiently tight so that said sectors are perfectly isolated from each other. This is even more important for the baffle which is located in a distributor ring, between the supply pipe and the water outlet pipe. Otherwise, at least part of the water flow is bypassed towards the outlet or the neighboring sector, to the detriment of the proper functioning of the exchanger. To avoid this, you must therefore ensure the quality of the baffle seals. If soldering is carried out for this, this imposes costly machining operations, and this does not exclude having to carry out subsequent rework in the workshop if leaks are still found during use.
  • the invention therefore proposes a heat exchanger with a layer of water tubes which overcomes the aforementioned drawbacks, by not using the usual baffles, said exchanger allowing a better distribution of the flows, with a low pressure drop.
  • a main object of the invention therefore consists of a heat exchanger with a cylindrical layer of water tubes arranged around a central burner and which open into lower and upper distributor rings between which the water performs several reversals of direction. circulation up and down successively in the bundles of adjacent tubes, exchanger according to which a plurality of separators each covering a sector of several water tubes are regularly distributed inside and around the entire periphery of each distributor ring and isolate their sector of the neighboring sector not provided with a separator, the separators of the upper distributor ring and those of the lower distributor ring being offset from each other and the water inlet pipe and the water outlet pipe being mounted diametrically opposite on the same distributor ring.
  • the separators of the upper distributor ring cover an odd number of water tubes and the water inlet and outlet pipes take on the upper distributor ring each in a sector comprising an even number of water tubes, without a separator.
  • the number of water tubes in the water inlet sector is different from that of the water outlet.
  • each separator consists of a folded sheet forming a bridge over several neighboring tubes, the two vertical sides of the separator which converge towards the center of the ring coming to bear against the base of the distributor ring , between two neighboring tubes.
  • the exchanger consists of a cylindrical layer of water tubes 1 which connect an upper distributor ring 2 and a lower distributor ring 3.
  • the tubes 1 define a combustion chamber 4 inside which is arranged a radial burner not shown.
  • the upper distributor ring 2 is closed by an annular cover 5 and the lower ring 3 also by another cover 6.
  • the combustion chamber 4 is closed, at the lower distributor ring by a bottom 7.
  • the ring upper distributor 2 is secured to a support plate 8 by which the exchanger is held in place in the device. On this plate are provided hooking lugs 9 for the burner.
  • the upper distributor ring 2 communicates with the water inlet and outlet pipes respectively by a supply connection 10 and by an outlet connection 11, the two connections being diametrically opposite on the ring.
  • a plurality of separators 12, the profile and the arrangement of which can be seen better in FIGS. 3 and 4 are placed inside each distributor ring.
  • Each separator 12 consists of a folded sheet, forming a bridge 15 above several neighboring tubes 1 and the two vertical sides 13 of the separator which converge towards the center of the ring come to bear against the base of the ring distributor, between two neighboring tubes.
  • the central part of the separator 12 forms a slight elevation 14 relative to the bridge 15 and bears against the annular cover 5 or 6 of the distributor ring considered, to which it is brazed. The separator is thus perfectly held in place. It will be noted that the vertical sides of each separator are spaced apart by a distance corresponding to nine tubes 1.
  • FIG. 5 illustrates the space occupied by the separators 12 inside the upper distributing ring 2. This figure shows the regular distribution of the seventy-two tubes 1 which constitute the exchanger. The water inlet 10 and the water outlet 11 which are on the same diameter AA ′ are shown on the dotted lines on each side of the distributor ring.
  • Figure 5 shows that there are four sectors with a separator, covering 36 tubes. Between each sector equipped with a separator, there is a sector that is not. We have seen that the entrance sector occupied eight tubes. The intermediate sectors have nine tubes. On the other hand, the outlet sector on the side of the conduit 11, on the diameter AA 'concerns 10 tubes. There is therefore between the inlet area and the outlet area of water a difference in the number of tubes whose interest will appear later. Thus the inlet 10 and outlet 11 conduits take on the upper distributor ring in a sector comprising an even number of water tubes, devoid of separator.
  • FIG. 6 shows that the space occupied by the separators 12 inside the lower distributor ring 3 - With respect to the same diameter AA ′ of the exchanger, it can be seen that the separators are offset with respect to the separators in FIG. 5 and are at the limit of said diameter.
  • a vertical flank 13 of the separator 12 is on the diameter AA ′, that is to say that the separator is offset by four tubes relative to that of the distributor ring superior. This offset is found on the side of the water outlet 11.
  • a vertical flank of the separator is also located on the diameter AA ′, but this time it is offset by five tubes relative to that of the upper distributing ring. It will thus be noted that the eight sectors of the lower distributing ring, that is to say the four which are capped with a separator and the four which are not, each cover 9 tubes.
  • the water admitted by the inlet 10 into the upper distributor ring 2 will descend into the eight tubes of the sector considered.
  • a deflector not shown is advantageously placed in the supply connection 10 so that the water is distributed in the eight starting tubes.
  • the vertical parts 13 of the two separators ( Figure 5) isolate the eight tubes from their neighbors.
  • the water descending in these eight tubes reaches the lower distributor ring 3. Due to the partition that constitutes the vertical flank 13 of the separator located as we have seen, on the diameter AA ', that is to say in the middle of the sector of the eight tubes, the descending water will be distributed on both sides of this partition and go back up in the neighboring tubes. We see that this first downward flow will be split on either side of the diameter AA '.
  • FIG. 7 schematically shows one half of the exchanger in an unrolled view between the water inlet 10 and the outlet 11.
  • the water admitted at 10 therefore descends through the eight starting tubes then separates to go up through five neighboring tubes before going down by four and so on until exit 11.
  • This alternation of five and four tubes is explained as follows.
  • the water descending in the first four tubes has the five neighboring tubes capped by the same separator to go up towards the upper distributor ring.

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP93401933A 1992-07-30 1993-07-26 Wärmetauscher mit ringförmig angeordneten Wasserrohren, insbesondere für Brennwertkessel Withdrawn EP0581663A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209442A FR2694388B1 (fr) 1992-07-30 1992-07-30 Echangeur de chaleur à nappe de tubes d'eau notamment pour chaudière à condensation.
FR9209442 1992-07-30

Publications (1)

Publication Number Publication Date
EP0581663A1 true EP0581663A1 (de) 1994-02-02

Family

ID=9432449

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401933A Withdrawn EP0581663A1 (de) 1992-07-30 1993-07-26 Wärmetauscher mit ringförmig angeordneten Wasserrohren, insbesondere für Brennwertkessel

Country Status (2)

Country Link
EP (1) EP0581663A1 (de)
FR (1) FR2694388B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101782270A (zh) * 2010-02-26 2010-07-21 艾欧史密斯(中国)热水器有限公司 冷凝式燃气锅炉
WO2016116808A1 (en) * 2015-01-23 2016-07-28 Camus Hydronics Ltd. Fire tube heater

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793313B1 (fr) 1999-05-04 2001-08-03 Guillot Ind Sa Echangeur de chaleur destine a equiper une chaudiere a eau chaude

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052055A1 (de) * 1980-11-07 1982-05-19 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Heizkessel mit abgeschlossener Brennkammer und zylindrischem Wärmetauscher
FR2508157A1 (fr) * 1981-06-17 1982-12-24 Sdecc Dispositif de cloisonnement a chicanes amovibles pour echangeurs a nappe de tubes d'eau
FR2509456A1 (fr) * 1981-07-07 1983-01-14 Sdecc Dispositif de repartition homogene d'un fluide dans un echangeur de chaleur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0052055A1 (de) * 1980-11-07 1982-05-19 SAUNIER DUVAL EAU CHAUDE CHAUFFAGE S.D.E.C.C. - Société anonyme Heizkessel mit abgeschlossener Brennkammer und zylindrischem Wärmetauscher
FR2508157A1 (fr) * 1981-06-17 1982-12-24 Sdecc Dispositif de cloisonnement a chicanes amovibles pour echangeurs a nappe de tubes d'eau
FR2509456A1 (fr) * 1981-07-07 1983-01-14 Sdecc Dispositif de repartition homogene d'un fluide dans un echangeur de chaleur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101782270A (zh) * 2010-02-26 2010-07-21 艾欧史密斯(中国)热水器有限公司 冷凝式燃气锅炉
WO2016116808A1 (en) * 2015-01-23 2016-07-28 Camus Hydronics Ltd. Fire tube heater

Also Published As

Publication number Publication date
FR2694388A1 (fr) 1994-02-04
FR2694388B1 (fr) 1994-10-14

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