EP1050721A1 - Wärmetauscher für einen Heizkessel - Google Patents

Wärmetauscher für einen Heizkessel Download PDF

Info

Publication number
EP1050721A1
EP1050721A1 EP00420089A EP00420089A EP1050721A1 EP 1050721 A1 EP1050721 A1 EP 1050721A1 EP 00420089 A EP00420089 A EP 00420089A EP 00420089 A EP00420089 A EP 00420089A EP 1050721 A1 EP1050721 A1 EP 1050721A1
Authority
EP
European Patent Office
Prior art keywords
tubes
section
heat exchanger
burner
exchanger according
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Withdrawn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
EP00420089A
Other languages
English (en)
French (fr)
Inventor
Emmanuelle Buttin
Jean-Paul Chapelle
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.)
Guillot Industrie SAS
Original Assignee
Guillot Industrie SAS
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 Guillot Industrie SAS filed Critical Guillot Industrie SAS
Publication of EP1050721A1 publication Critical patent/EP1050721A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • F28F1/02—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
    • 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
    • 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
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular

Definitions

  • the present invention relates to a heat exchanger intended to equip a hot water boiler.
  • a burner placed in the heart of the boiler and which allows the exothermic combustion of a fuel.
  • the amount of heat as well released is partially recovered by a heat exchanger placed around of the burner.
  • This heat exchanger has tubes in which circulates water. The tubes are heated and the heat is thus transferred to the water flowing inside them.
  • the tubes used are tubes of circular section. They are mounted between two plates called plates tubular. On each tube plate is mounted a water box allowing irrigation and circulation of water in the tubes.
  • the tubes are fixed to the tubular plates by welding. Circular section tubes are preferably used because it is the easiest form of tubes solder.
  • document FR 2 694 388 discloses a heat exchanger with water tubes having section water tubes substantially trapezoidal. This form increases the yield of the exchanger but the tubes are very close to each other what which poses problems of mechanical stress by expansion differential at the level of the tubular plates.
  • the object of the present invention is therefore to provide an exchanger heat intended to equip a hot water boiler allowing to have good energy efficiency without weakening mechanically the tubular plates.
  • a heat exchanger of the type comprising at least one ply of tubes each intended for circulation of a heat transfer liquid and arranged near a burner.
  • At least one tube present near its ends a first cross section, preferably circular, while at a distance from its ends it has a cross section distinct, preferably substantially polygonal.
  • the tubes having different sections at ends relative to the rest of their length it is possible to have on the one hand, a section at the ends to facilitate assembly tubes, by choosing for example a circular section which is easy to weld on a tubular plate and whose width is controlled and other share a section on the largest part of the tube which allows to favor good heat exchange between the hot gases and the tubes.
  • the tube at least one present at a distance from its ends for example an irregular pentagonal section, symmetrical by relative to a plane passing through the axis of the burner, the pentagon comprising a long side facing the burner and two short sides extending substantially at right angles to the long side, in a radial plane with respect to the burner.
  • This fairly flat section shape allows a good exchange of heat.
  • a heat exchanger comprises advantageously near the burner, a first layer of tubes of circular section and a second ply of tubes having at their ends a cross section separate from their cross section at distance from these ends.
  • folded sheets forcing the hot gases along the wall of the tubes of the second layer of tubes are advantageously provided beyond the second ply of tubes. We force thus the gases to remain in contact as long as possible with the tubes of the second tablecloth.
  • each folded sheet has stamped ribs, the top of which is intended to come into contact with tubes of the second layer, thus creating baffles in which the hot gases must pass.
  • the ribs are then advantageously inclined with respect to the tubes so as to allow the evacuation of water of condensation.
  • FIG. 1 shows a general view of a heat exchanger heat for a hot water boiler.
  • a space 2 is left free to allow the placement of a non-burner represented.
  • the exchanger comprises an upper water box 4, a box lower water 6, a first layer of tubes 8 and a second layer of tubes 10.
  • the upper water box is connected to a hot water network by via two water taps 12.
  • the tubes 8 of the first ply and the tubes 10 of the second ply are welded to each of their end on a tube plate 14 and water circulates inside these.
  • the tubes of the first layer that is to say the tubes placed at the closer to the burner are cylindrical tubes of circular section. We see these tubes in section in Figure 2. Over their entire length, between the two tubular plates 14, these tubes 8 have a constant section. All the tubes 8 are placed on a cylinder of circular section and having an axis 16. The boiler burner is centered on this axis 16.
  • the tubes 10 of the second heat exchanger ply are also arranged on a cylinder of circular section and axis 16. This second cylinder is larger in diameter than the cylinder corresponding to the first ply of tubes 8.
  • the tubes 10 are at each times placed angularly between two neighboring tubes 8. So the hot gases of the burner are forced to zigzag between the tubes 8 and 10 which favors better heat exchange.
  • the tubes 10 have at their ends close to the plates tubular 14 a circular section. At their center, they present a pentagonal section. This polygonal section is constant over almost the entire length of the tubes 10, except in the end zones. A zone transition 18 exists between the parts of circular section and the center of pentagonal section.
  • Such a tube 10 is for example obtained by stamping. Only the central part of the tube is stamped, the ends of the tube retaining the original shape of the deformed tube.
  • the pentagonal section of the tubes 10 is flattened in the direction radial of the cylinder formed by the ply of tubes 10 and is widened in the direction circumferential of this cylinder. Therefore, the space left free between two neighboring tubes 10 is much weaker in the center of tubes 10 than at their end.
  • the pentagonal section of the tubes 10 has a large base 20, two side walls 22 and two top walls 24.
  • the base 20 of the pentagonal section is oriented towards the burner. This base is substantially tangential to the second layer of tubes 10.
  • the side walls 22 extend substantially radially by relative to the axis 16. They form an angle with the base 20 which is slightly greater than 90 ° The length of these side walls is substantially less than the length of the base 20.
  • the two walls of vertex 24 close the pentagonal section and have a shape reminiscent of a roof.
  • baffles 26 On the outer face of the second ply of tubes 10, are arranged bands of stamped and folded metallic material. These strips are called corrugated baffles 26. These folded strips are at each placed on horseback on two tubes 10.
  • the baffles 26 extend over the entire length of the pentagonal section of the tube 10. They have a V section. The point of the V is placed between two tubes 10 while the angle formed by the V is such that the branches of the V are at each time parallel to a top wall 24 of a tube 10.
  • the baffles 26 have ribs 28 projecting from the side of the tube 10. The top of these ribs 28 rests on the top wall 24 corresponding. Thus are created passage channels for the gases of the burner.
  • the ribs 28 are inclined relative to the axes of the tubes 10 to allow the water which condenses on the baffle 26 to be brought to the low.
  • arrows 30 symbolize the passage of gases hot from the burner. These gases pass on either side of the tubes 8 of the first layer then pass between the tubes 10 of the second layer.
  • the passage between the tubes 10 is substantially narrower than the passage between the tubes 8.
  • the channel thus obtained extends radially and has a substantially constant width over the entire length of the side walls 22 corresponding tubes 10. Therefore, there is between the tubes 10 a relatively high gas speed which promotes good heat exchange between these gases and the tubes 10.
  • the hot gases then pass into the corrugated baffles 26 to optimize the heating of the water circulating in the tubes 10.
  • the gases then again supply the top walls 24 with 10 calories tubes.
  • the cooling of the corrugated baffles 26 is as for it ensured by the multiple contacts existing between these baffles 26 and the corresponding tubes.
  • the shape of the tubes 10 allows to have a good heat exchange. This good energy efficiency does not imply an increase in mechanical stresses in the exchanger.
  • the space between two adjacent welds is much greater than the space left between the tubes 10 in the center of these. So we find mechanical stresses by differential expansion similar to constraints that would be encountered if the tubes 10 had over their entire length a circular cross section.
  • the exchanger according to the invention therefore makes it possible to have a good energy efficiency, to have tubes easy to assemble since round tubes are easy to weld while keeping a ligament (space between two neighboring tubes at the level of the tube plate) sufficient for a mounting with seals and without creating mechanical stress by high differential expansion.
  • the pentagonal shape of the tubes of the second layer of tubes optimizes the heat exchange between hot gases and water (or other liquid) circulating in the tubes.
  • the base of the pentagon, arranged tangentially between two tubes of the first layer forms a barrier that the gases are forced to go along.
  • the side walls allow define a radially extending channel in which the gases flow at high speed thus promoting heat exchange.
  • the walls of top allow centering of the baffles.
  • This exchanger described above can be made of steel, stainless steel, copper or any other metallic material. However, to further increase the performance of this exchanger, by terms of heat transfer, we can, by an all-steel design stainless steel, allow this exchanger to work in condensation.
  • the section of the tubes of the second layer might be different.
  • the section in the center is not necessarily pentagonal.
  • the first layer of tubes is shown here with tubes of constant circular section over the entire length of the tube. We could of course also have tubes at the level of the first ply whose end section is different from the center section.
  • baffles increase the efficiency of the exchanger but do not not part of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP00420089A 1999-05-04 2000-05-03 Wärmetauscher für einen Heizkessel Withdrawn EP1050721A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9905812A FR2793313B1 (fr) 1999-05-04 1999-05-04 Echangeur de chaleur destine a equiper une chaudiere a eau chaude
FR9905812 1999-05-04

Publications (1)

Publication Number Publication Date
EP1050721A1 true EP1050721A1 (de) 2000-11-08

Family

ID=9545320

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00420089A Withdrawn EP1050721A1 (de) 1999-05-04 2000-05-03 Wärmetauscher für einen Heizkessel

Country Status (2)

Country Link
EP (1) EP1050721A1 (de)
FR (1) FR2793313B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009115447A2 (de) * 2008-03-15 2009-09-24 Robert Bosch Gmbh Heizgerät
EP2154444A3 (de) * 2008-08-16 2012-06-06 Robert Bosch GmbH Wärmetauscher für ein Heizgerät
EP2948726A4 (de) * 2013-01-25 2016-12-07 Laars Heating Systems Company Wärmetauscher in kompaktbauweise
CN106767013A (zh) * 2016-12-29 2017-05-31 上海德朗汽车零部件制造有限公司 一种花生管式汽车散热器
US10094619B2 (en) 2013-07-12 2018-10-09 Laars Heating Systems Company Heat exchanger having arcuately and linearly arranged heat exchange tubes
EP3387356A4 (de) * 2015-12-11 2019-07-24 Lochinvar, LLC Wärmetauscher mit doppelten konzentrischen rohrringen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1119126A (fr) * 1954-02-20 1956-06-15 Escher Wyss Ag Faisceau de tubes pour échangeurs de chaleur et procédé pour sa fabrication
FR2314448A1 (fr) * 1975-06-09 1977-01-07 Vidalenq Maurice Chaudiere a gaz, notamment pour le chauffage central
FR2315667A1 (fr) * 1975-06-28 1977-01-21 Stoves Ltd Echangeur de chaleur pour un appareil de chauffage d'eau au gaz
EP0685698A1 (de) * 1994-06-01 1995-12-06 Caradon Ideal Limited Wärmetauscher
DE29517325U1 (de) * 1995-11-02 1996-02-01 Buderus Heiztechnik Gmbh, 35576 Wetzlar Wärmetauscherrohr
US5687678A (en) * 1995-01-26 1997-11-18 Weben-Jarco, Inc. High efficiency commercial water heater

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2694388B1 (fr) 1992-07-30 1994-10-14 Sdecc Echangeur de chaleur à nappe de tubes d'eau notamment pour chaudière à condensation.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1119126A (fr) * 1954-02-20 1956-06-15 Escher Wyss Ag Faisceau de tubes pour échangeurs de chaleur et procédé pour sa fabrication
FR2314448A1 (fr) * 1975-06-09 1977-01-07 Vidalenq Maurice Chaudiere a gaz, notamment pour le chauffage central
FR2315667A1 (fr) * 1975-06-28 1977-01-21 Stoves Ltd Echangeur de chaleur pour un appareil de chauffage d'eau au gaz
EP0685698A1 (de) * 1994-06-01 1995-12-06 Caradon Ideal Limited Wärmetauscher
US5687678A (en) * 1995-01-26 1997-11-18 Weben-Jarco, Inc. High efficiency commercial water heater
DE29517325U1 (de) * 1995-11-02 1996-02-01 Buderus Heiztechnik Gmbh, 35576 Wetzlar Wärmetauscherrohr

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009115447A2 (de) * 2008-03-15 2009-09-24 Robert Bosch Gmbh Heizgerät
US20110114086A1 (en) * 2008-03-15 2011-05-19 Babcock Power Services Inc Heating device
WO2009115447A3 (de) * 2008-03-15 2012-10-18 Robert Bosch Gmbh Heizgerät
EP2154444A3 (de) * 2008-08-16 2012-06-06 Robert Bosch GmbH Wärmetauscher für ein Heizgerät
EP2948726A4 (de) * 2013-01-25 2016-12-07 Laars Heating Systems Company Wärmetauscher in kompaktbauweise
US10094619B2 (en) 2013-07-12 2018-10-09 Laars Heating Systems Company Heat exchanger having arcuately and linearly arranged heat exchange tubes
EP3387356A4 (de) * 2015-12-11 2019-07-24 Lochinvar, LLC Wärmetauscher mit doppelten konzentrischen rohrringen
US10458677B2 (en) 2015-12-11 2019-10-29 Lochinvar, Llc Heat exchanger with dual concentric tube rings
CN106767013A (zh) * 2016-12-29 2017-05-31 上海德朗汽车零部件制造有限公司 一种花生管式汽车散热器

Also Published As

Publication number Publication date
FR2793313B1 (fr) 2001-08-03
FR2793313A1 (fr) 2000-11-10

Similar Documents

Publication Publication Date Title
FR2798990A1 (fr) Double echangeur de chaleur pour conditionneur d'air de vehicule
FR2785043A1 (fr) Condenseur brase destine a un systeme de climatisation
EP0505243A1 (de) Wärmetauscher mit mehreren Rohrreihen, insbesondere für Kraftfahrzeuge
EP1050721A1 (de) Wärmetauscher für einen Heizkessel
EP3080542A1 (de) Sammelbox und entsprechender wärmetauscher
WO2015114101A1 (fr) Echangeur de chaleur pour véhicule automobile
EP0204791B1 (de) Feuerraumwand mit luftzuführungsdüsen, die aus zwei sich ergänzenden teilen geformt sind
EP1957927B1 (de) Verstärkter sammler für den sammelbehälter eines wärmetauschers und einen solchen sammler umfassender sammelbehälter
EP0692692A1 (de) Rohr mit länglichem Querschnitt für Wärmetauscher
EP1947386B1 (de) Heizgaswirbler, insbesondere für Rauchrohrkessel und entsprechender Kessel
EP3354997B1 (de) Heizkessel mit verbesserter leistung
EP3499165A1 (de) Vorrichtung zur wärmerückgewinnung, und entsprechendes herstellungsverfahren
EP0780655A1 (de) Wärmetauscher mit gelötetem Wasserkasten, insbesondere für ein Kraftfahrzeug
FR2821924A1 (fr) Echangeur de chaleur a condensation, notamment pour chaudiere
EP1164346B1 (de) Dichtungshülse zum Erzielen einer dichten Verbindung zwischen zwei flachen paralellen Wänden aus dünnwandinem Blech
FR2723632A1 (fr) Dispositif d'echange de chaleur pour une chaudiere basse temperature
BE1001466A6 (fr) Echangeur de chaleur gaz-gaz et procede de fabrication d'un tel echangeur.
FR3062901A1 (fr) Tube d’echangeur thermique, echangeur thermique et procede d’assemblage du tube correspondants
BE417914A (de)
EP3430339B1 (de) Wärmetauscher, insbesondere für ein fahrzeug, speziell ein kraftfahrzeug
FR2916836A1 (fr) Echangeur de chaleur muni de joues perforees
FR2538525A1 (fr) Moyen permettant un transfert de chaleur eleve pour echangeur de chaleur a tubes et ailettes plats
FR2463368A1 (fr) Corps de chauffe pour chaudieres domestiques de chauffage central a eau chaude par le gaz
BE1006641A5 (fr) Installation de chauffage central avec circuit d'eau chaude a usage domestique.
FR2703767A1 (fr) Dispositif d'échange de chaleur à faisceau de tubes faiblement espacés et chaudière ainsi équipée.

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010417

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20030204

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040120