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EP0823361B1 - Brennwertkessel - Google Patents

Brennwertkessel Download PDF

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Publication number
EP0823361B1
EP0823361B1 EP97830392A EP97830392A EP0823361B1 EP 0823361 B1 EP0823361 B1 EP 0823361B1 EP 97830392 A EP97830392 A EP 97830392A EP 97830392 A EP97830392 A EP 97830392A EP 0823361 B1 EP0823361 B1 EP 0823361B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
boiler
heat
chamber
combustion chamber
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.)
Expired - Lifetime
Application number
EP97830392A
Other languages
English (en)
French (fr)
Other versions
EP0823361A2 (de
EP0823361A3 (de
EP0823361A1 (de
Inventor
Dante Ferroli
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.)
Ferroli SpA
Original Assignee
Ferroli SpA
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 Ferroli SpA filed Critical Ferroli SpA
Publication of EP0823361A2 publication Critical patent/EP0823361A2/de
Publication of EP0823361A1 publication Critical patent/EP0823361A1/de
Publication of EP0823361A3 publication Critical patent/EP0823361A3/de
Application granted granted Critical
Publication of EP0823361B1 publication Critical patent/EP0823361B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F28F1/16—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 being integral with the element, e.g. formed by extrusion
    • 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
    • F24H1/26—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 forming an integral body
    • F24H1/263—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 forming an integral body with a dry-wall combustion chamber

Definitions

  • the present invention relates to a high efficiency heat exchanger boiler according to the preamble of claim 1.
  • conventional boilers used in centralized heating systems for buildings in general usually comprise a combustion chamber or combustor and a heat exchanger, one side of which is in contact with the combustion products, and the other side of which is in contact with a carrying fluid, usually comprising water, and which is successively conveyed to heat radiating units provided in the rooms of the building to be heated.
  • One of the main problems related to a proper designing of heating system boilers is that of providing a thermal exchange efficiency between the combustion fumes and the heat carrying fluid.
  • the document DE 3 640 503 C discloses a heat exchanger boiler substantially according to the preamble of Claim 1.
  • the aim of the present invention is to overcome the above mentioned drawbacks, by providing such a heating system boiler which comprises a high thermal exchange efficiency heat exchanger, which can be made at a very reduced cost.
  • a main object of the present invention is to provide such a heat exchanger boiler which can be made by a simple melting operation in a conventional mold or in sand, while preserving those constructional features which are indispensable for providing a high thermal exchange efficiency.
  • Another object of the present invention is to provide such a heat exchanger boiler which can be assembled, at least with respect to the heat exchanger assembly thereof, in a very short time.
  • the heating system boiler which has been generally indicated by the reference number 1, comprises an outer casing 2 or shell and a heat exchanger 3.
  • the heat exchanger 3 has a prismatic configuration, preferably having a square base, and being of hollow construction.
  • Said heat exchanger 3 is vertically arranged inside said casing 2 and is provided with an inner shell 4 which laterally delimits a combustion chamber or combustor 5, in which a burner 6, of any suitable known types, is arranged.
  • the outer shell 7 of the heat exchanger 3 defines, together with the inner surface of the casing 2, a chamber 8 in which a heat carrying fluid is circulated, said fluid preferably comprising water.
  • a gap 9 is defined, occupied by a plurality of fins 10 of said heat exchanger.
  • combustion chamber or combustor 5 is preferably formed in the top half of said heat exchanger 3 and is delimited, at the bottom thereof, by a sector 11, arranged in a middle region of the inner hollow of said heat exchanger 3.
  • the outer shell of the heat exchanger 3 is in turn provided with a plurality of fins 12, which have been specifically designed to increase the thermal exchange surface between the heat exchanger 3 and the heat carrying fluid, caused to circulate inside said chamber 8.
  • the finned gap 9 communicates with the combustion chamber 5 at the top end portion thereof.
  • the combustion chamber 5 is closed, at the top thereof, by a top portion 13 which is spaced by the top end portion of the gap 9 so that the fumes or combustion gases produced by the combustion inside said chamber 5, will be introduced into said gap 9 and will descend, along said gap, so as to contact the mentioned fins 10.
  • the bottom end portion of said finned gap 9 communicates, as shown, with a fume or combustion gas collecting and removing duct 14.
  • the chamber 8 communicates, near its bottom end portion, with a supplying duct 15, provided for introducing said heat carrying fluid into said chamber 8 and, near the bottom end portion thereof, with an outlet duct 16, for removing from said chamber 8 said fluid.
  • a counter-current heat transmission occurs, i.e. from the combustion gases or fumes descending along said gap 7 and the heat carrying fluid driven upwardly along said chamber 8.
  • the heat exchanger 3 will provide a high efficiency heat transmission from said fumes to said fluid, and, moreover, said heat exchanger can be made at a very reduced cost.
  • said heat exchanger 3 is preferably made as a single piece by melting it into a conventional mold or in a sand mold arrangement.
  • the specifically designed hexagonal base prismatic configuration of said heat exchanger will allow to make it without omitting, as it would occur with a circular configuration, any portions of the fins, in order to provide an easy removal from the mold.
  • said heat exchanger 3 can be made, depending on requirements, either by a melting method or by a die casting method, starting from a cast iron or an aluminium material.
  • said heat exchanger defines said combustion chamber 4.
  • the mentioned prismatic configuration will allow to produce the heat exchanger by casting its metal material into a single core and, accordingly, greatly reducing its making cost, with respect to prior art heat exchangers.
  • the combustion chamber 4 owing to its construction, provides the advantage that the walls of the combustion chamber may be easily cooled down through the fins 9.
  • the prismatic configuration of the combustion chamber, as well as the easy and quick cooling thereof, will allow to use a radial burner of low cost and less polluting than conventional burners.
  • the top portion of the body contacting said combustion chamber will provide a primary thermal exchange function, like a conventional boiler.
  • the used materials provided that they are compatible to the intended application, as well as the contingent size and shapes, can be any, depending on requirements.

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)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Air Supply (AREA)

Claims (7)

  1. Brennwertkessel (1) mit einem sich vertikal erstreckenden, hohlen Wärmetauscher (3) mit einer Innenhülse (4), die eine Brennkammer (5) seitlich abgrenzt, sowie einer Außenhülse (7), die in einer Umlaufkammer für wärmetragende Flüssigkeiten (8) angeordnet ist, wobei zwischen der Außenhülse (7) und der Innenhülse (4) ein gerippter Spalt (9) vorgesehen ist, wobei der gerippte Spalt (9) an seinem oberen Endteilstück mit der Brennkammer (5), und an seinem unteren Endteilstück mit einer Rauchgassammlungs- und Abführungsleitung (14) verbunden ist,
    dadurch gekennzeichnet, daß
    daß der hohle Wärmetauscher (3) einen prismenförmigen Querschnitt aufweist, und daß der Wärmetauscher aus einem einstückigen Körper besteht.
  2. Kessel nach Anspruch 1,
    dadurch gekennzeichnet, daß
    die Außenhülse (7) gerippt ist.
  3. Kessel nach den Ansprüchen 1 und 2,
    dadurch gekennzeichnet, daß
    die Umlaufkammer für wärmetragende Flüssigkeiten (8) unten mit einer Einlaßleitung für wärmetragende Flüssigkeit (15) und an ihrem oberen Endteilstück mit einer Auslaßleitung für wärmetragende Flüssigkeit (16) verbunden ist, um einen Gegenstrom-Wärmeaustausch zwischen den fallenden Rauchgasen, die sich durch den Spalt (9) nach unten bewegen, und der aufsteigenden wärmetragenden Flüssigkeit, die entlang der Kammer (8) aufsteigt, zu bieten.
  4. Kessel nach einem oder mehreren der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    der Wärmetauscher durch Gießen hergestellt ist.
  5. Kessel nach einem oder mehreren der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    der Wärmetauscher durch Spritzguß hergestellt ist.
  6. Kessel nach einem oder mehreren der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    die Brennkammer (5) an ihrer Unterseite durch einen im mittleren Bereich der Höhe des Wärmetauschers (3) angeordneten Sektor (11) begrenzt ist.
  7. Kessel nach einem oder mehreren der vorstehenden Ansprüche,
    dadurch gekennzeichnet, daß
    der Wärmetauscher (3) einen sechseckigen Querschnitt aufweist.
EP97830392A 1996-08-02 1997-07-25 Brennwertkessel Expired - Lifetime EP0823361B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT96MI001697A IT1283679B1 (it) 1996-08-02 1996-08-02 Caldaia con scambiatore di calore ad elevato rendimento
ITMI961697 1996-08-02

Publications (4)

Publication Number Publication Date
EP0823361A2 EP0823361A2 (de) 1998-02-11
EP0823361A1 EP0823361A1 (de) 1998-02-11
EP0823361A3 EP0823361A3 (de) 1998-11-04
EP0823361B1 true EP0823361B1 (de) 2000-06-14

Family

ID=11374767

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97830392A Expired - Lifetime EP0823361B1 (de) 1996-08-02 1997-07-25 Brennwertkessel

Country Status (6)

Country Link
EP (1) EP0823361B1 (de)
AT (1) ATE193869T1 (de)
DE (1) DE69702287T2 (de)
ES (1) ES2148922T3 (de)
IT (1) IT1283679B1 (de)
PT (1) PT823361E (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2712277A1 (de) * 1977-03-21 1978-09-28 Froeling Kessel App Heizkessel fuer fluessige oder gasfoermige brennstoffe
DE8610699U1 (de) * 1986-04-18 1986-05-28 Buderus Ag, 6330 Wetzlar Zentralheizungskessel für strömende Brennstoffe
DE3640503C1 (de) * 1986-11-27 1988-03-24 Babcock Werke Ag Heizungskessel fuer eine Niedertemperaturheizung
NL8800649A (nl) * 1988-03-16 1989-10-16 Remeha Fabrieken Bv Gasgestookt verwarmingstoestel en werkwijze voor het vervaardigen daarvan.

Also Published As

Publication number Publication date
PT823361E (pt) 2000-09-29
DE69702287T2 (de) 2000-11-30
ITMI961697A0 (de) 1996-08-02
IT1283679B1 (it) 1998-04-23
EP0823361A3 (de) 1998-11-04
DE69702287D1 (de) 2000-07-20
EP0823361A1 (de) 1998-02-11
ES2148922T3 (es) 2000-10-16
ATE193869T1 (de) 2000-06-15
ITMI961697A1 (it) 1998-02-02

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