EP2038586A2 - Échangeur de chaleur de structure modulaire et son procédé de formation - Google Patents

Échangeur de chaleur de structure modulaire et son procédé de formation

Info

Publication number
EP2038586A2
EP2038586A2 EP06783828A EP06783828A EP2038586A2 EP 2038586 A2 EP2038586 A2 EP 2038586A2 EP 06783828 A EP06783828 A EP 06783828A EP 06783828 A EP06783828 A EP 06783828A EP 2038586 A2 EP2038586 A2 EP 2038586A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
burner
members
flue gas
channel
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Withdrawn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
EP06783828A
Other languages
German (de)
English (en)
Inventor
Jan Hubertus Deckers
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 EP2038586A2 publication Critical patent/EP2038586A2/fr
Withdrawn legal-status Critical Current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
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/46—Water heaters having plural combustion chambers
    • 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

Definitions

  • the invention relates to a heat exchanger.
  • the invention particularly relates to a gas-fired heating apparatus for space heating and/or tap water heating, provided with such a heat exchanger.
  • Heating apparatuses are known from practice and are used to provide, for instance, a space heating, such as central heating, or for heating tap water, for instance in a boiler. These functions may also be combined in one heating apparatus.
  • a heat exchanger is preferably cast in one piece, for instance from light metal.
  • Such a heat exchanger comprises a burner chamber with a heating exchange area contiguous thereto. From the heat exchange area, further, a flue gas exhaust channel extends.
  • Such a heating apparatus has the advantage that is can be built relatively compactly, at least in proportion to the desired capacity.
  • a drawback of such a heating apparatus is that the heat exchanger will always be geared to a certain prefixed capacity. For a supplier of such heating apparatuses, this means that a series of different heat exchangers will need to be cast in order to be able to supply heating apparatuses with different capacities. This is expensive and logistically inconvenient.
  • the molds to be used for this are relatively large and consequently expensive.
  • the invention contemplates providing a heat exchanger which has a simple structure and can simply be adjusted to a desired or required capacity.
  • the invention particularly contemplates providing a heat exchanger which can be built up with relatively simple means. It is a further object of the invention to provide a heat exchanger which has a high efficiency during use.
  • the invention further contemplates providing a heat exchanger which can be designed so as to condense. It is a still further object of the invention to provide a heat exchanger which can have a relatively compact and light design, can simply be connected and operated and which has a good ratio of weight to capacity.
  • a heat exchanger according to the invention is characterized by the measures according to claim 1.
  • a heat exchanger is built up from a series of members, each shaped such that it can be used as a heat exchanger by itself.
  • Each member comprises inter alia a burner chamber with a burner position in which a burner can be placed, a water-carrying channel and a flue.
  • a series of such members can also be intercoupled as desired, while also one such member can be used as a heat exchanger. Since each member has an inlet and outlet for the water channel, as well as a burner position, and the members are preferably identical, a first, second and third channel can simply be provided for connecting the inlets, the burner positions and the outlets, respectively. These channels can extend against the outside along the members. Thus, a particularly advantageous, simple construction is obtained.
  • the first, second and third channel can simply be adjusted for length to the number of members provided in the heat exchanger.
  • the water- carrying channels of the different members preferably form parallel heating paths whereby individual heating is obtained in the members.
  • the burner chambers of the different members are interconnected in that they are open on both sides.
  • one continuous burner chamber is created with a burner therein in each member.
  • Both ends of such a heat exchanger are preferably closed off by a closing plate, while, in one of the closing plates, an igniter may be provided for the different burners. If the heat exchanger is only built up from one element or member, it is closed off by a closing plate on both sides.
  • the first, second and third channel are provided in a profile, in particular an extruded profile.
  • a profile has the advantage that it is simple to manufacture and can, in addition, simply be geared to the length of the series of members.
  • a fourth channel is provided as well, for connection of the flue gas exhausts, which fourth channel can also be included in above-mentioned profile.
  • the members are preferably substantially rectangular, such that they can connect to one another and/or a closing plate by two opposite flat sides.
  • the top side of the members is preferably substantially flat, at least such that, of the inlet, burner position, outlet and flue gas exhaust, at least two, more in particular three and preferably four are located in one plane, i.e. level with one another. More generally, it is preferred that the inlets, burner positions, outlets and flue gas exhausts are placed with respect to one another such that straight first, second, third and/or fourth channels can be provided along them for connection thereto. This allows the channels to be made and connected more simply.
  • heat-transferring surface-increasing elements such as cams and/or ribs are provided.
  • heat-transferring surface-increasing elements such as cams and/or ribs are provided.
  • heat from combustion gases can more adequately be transferred to water in the or each water-carrying channel in a respective member.
  • such elements are particularly provided in a heat exchange area and/or in the flue gas feed-through, where the combustion gases are relatively warm compared to the water flowing along them.
  • a part of the water-carrying channel in particular a part extending from or from near the inlet, extends so as to be included between the heat exchange area and/or the burner chamber on the one side and the flue gas feed-through on the other side.
  • Heat- transferring surface -increasing elements may be provided against the wall of the flue gas exhaust, on the side thereof proximal to the above-mentioned part of the water-carrying channel.
  • the or each water-carrying channel preferably extends along at least two sides of the burner chamber and at least two sides of the heat exchange area.
  • a heat exchanger preferably, use is made of relatively small burners, for instance with a surface of less than 2000 mm 2 , more in particular less than 100 mm 2 .
  • a burner with a substantially round burner cover for instance with a diameter of 25 to 30 mm, the burner preferably having a height which is also relatively small, for instance less than 30 mm, more in particular less than 20 mm, and preferably an average height between about 10 and 15 mm.
  • Such burners are, for instance, known by the name of Furinit.
  • Such relatively small burners have the advantage that they require little space for building in and can develop sufficient heat.
  • the burner chamber preferably widens slightly in the direction of the heat exchange area, so that the diameter of the burner chamber increases in the direction of the contiguous heat exchange area.
  • the flow rate of the flue gases is thus controlled. It has surprisingly been found that thus the sound production of the burners can be limited during use.
  • the increase is preferably gradual and only needs to be small, for instance a few millimeters across the height of the burner chamber.
  • the invention further relates to a method for forming a heat exchanger, in particular according to the invention, and a heating apparatus provided with such a heat exchanger.
  • the invention further relates to a member for use in a heat exchanger according to the invention.
  • Figs. IA and B show, in perspective bottom view and top view, respectively, a member according to the invention
  • Fig. 1C shows, in cross-sectional side view similar to Fig. 3, an alternative embodiment of a member according to the invention
  • Fig. 2 shows, in front view, a member according to Fig. 1;
  • Fig. 3 shows, in cross-sectional side view according to line A — A in Fig. 2, a member according to the invention
  • Fig. 4 shows, in top plan view, a member according to Figs. 1 — 3;
  • Fig. 5 shows, in exploded perspective top view, a heat exchanger according to the invention, with three members, without closing plates;
  • Fig. 6 shows, in perspective bottom view, the heat exchanger according to claim 5, in assembled condition
  • Fig. 7 shows, in cross-sectional side view similar to Fig. 3, a member according to the invention, in an alternative embodiment
  • Fig. 8 shows, in top plan view, a heat exchanger according to the invention, built up from members according to Fig. 7, with detached closing plates;
  • Fig. 9 shows, in top plan view, a heat exchanger according to Fig. 8, with a first, second and third channel provided thereon; and Fig. 10 schematically shows, in front view, a heating apparatus according to the invention, provided with a heat exchanger with a series of members.
  • Figs. IA - C show a member 1 according to the invention in perspective bottom view and top view and an alternative embodiment thereof in side view, respectively, for the construction of a heat exchanger 30, for instance as shown in Figs. 5 and 6.
  • This member 1 is preferably cast in light metal, for instance aluminum or an aluminum alloy or another suitable material. Light metal has the advantage of a good ratio of weight to heat capacity.
  • the member 1 is shown in more detail in Figs. 2 - 4 in front view, side view and top view.
  • the member 1 comprises a top surface 31 with an outlet 2, a burner position 4 with a burner 5 therein, an inlet 6 and a flue gas exhaust 7 therein next to one another.
  • a burner chamber 2 extends which connects to a heat exchange area 32 on the side remote from the top surface 31.
  • the burner chamber 2 tapers slightly in the direction of the heat exchange area 32.
  • Fig. 1C shows an alternative, particularly advantageous embodiment in which the burner chamber 2 widens slightly in the direction of the heat exchange area 32, which means that the cross-sectional surface of the burner chamber
  • a burner cover 33 of the burner 5 extends into the burner chamber 2, at least faces it, so that, during use, flue gases heated by the burner can flow to the heat exchange area 32 in the direction of the arrows H.
  • a water-carrying channel 10 is provided, which extends on two sides of the burner chamber 2 and the heat exchange area 32 (in Fig. 2 on the left and right side, further to be referred to as front and back side) and runs below the heat exchange area 32.
  • the channel has a slightly U-shaped side view and is bounded by the walls 13, 35 and 34.
  • the water-carrying channel 10 is closed off by a wall 13 on the two sides of the member 1 (in Fig. 3 on the left and right side, further to be referred to as sides), while the burner chamber 2 and the heat exchange area 32 are open on the two sides.
  • a partition wall 35 is provided between the water-carrying channel 10 and the burner chamber 2 and the heat exchange area 32, on the front and back side.
  • heat-transferring surface-increasing elements 9 in the form of pins and/or ribs, preferably cast integrally therewith, extend in the heat exchange area 32.
  • These heat-transferring surface -increasing elements 9 are placed and designed such that, between them, one or more meandering flow paths for flue gases are provided.
  • an intensive contact is obtained between above-mentioned elements and the walls 35 on the one hand and the flue gases on the other hand.
  • a passage 11 is provided where the heat exchange area 32 connects to a flue gas feed-through 36.
  • This flue gas feed-through 36 has a first part 12 extending below the heat exchange area 32 and the water-carrying channel 10 and an upward second part 12A extending in the direction of the top surface 31 between the wall 34 and the wall 8.
  • the flue gas exhaust 7 is provided in the top surface 31, the flue gas exhaust 7 is provided.
  • heat- transferring surface-increasing elements 9 extend from a part of the wall 35B extending along the water-carrying channel 10, for transferring residual heat in the flue gases to water in the water-carrying channel 10.
  • arrows W show that inflowing water, which will be relatively cool, flows along the flue gas passage, while water already heated up in the water-carrying channel 10 flows on the opposite side, so that always optimal use is made of heat in the flue gases for further heating the water.
  • the element or member 1 can have a rectangular front view and a flat top side.
  • the inlet 3, the burner position 4, the inlet 6 and the flue gas exhaust 7 are level. This can have constructive advantages for each member 1 but particularly also for coupling the outlets 3, the burner positions 4 or at least the burners 5, the inlets 6 and the flue gas exhausts 7, respectively.
  • a first channel 40, a second channel 41, a third channel 42 and a fourth channel 43, respectively, can simply be provided above the juxtaposed top surfaces 31 of the different members 1, as schematically shown in Figs. 5 and 6.
  • the channels 40, 41, 42 and 43 all have a straight design and are provided in an extrusion profile 44 having four passages between a top and bottom wall 45, 46, separated from one another by cross walls 47 and two side walls 48.
  • a heat exchanger 30 is shown which is provided with three members 1. These are placed next to one another, with interposition of suitable gaskets (not shown), thereby forming a row with a continuous burner chamber 2 and heat exchange areas 32.
  • the end walls 15, 16 (Fig. 8) are omitted in Figs. 5 and 6 for simplification.
  • the extrusion profile 44 has been sawn down to a length Li which is slightly larger than combined length L2 of the three members 1.
  • openings 49 — 52 are provided, corresponding to the outlets 3, the burner positions 4, the inlets 6 and the flue gas exhausts 7.
  • a gasket with a similar hole pattern may be provided between the extrusion profile 44 and the top surfaces 31, with overlapping holes, so that a gastight and liquid-tight sealing is obtained.
  • the extrusion profile can be fixed in any suitable manner, for instance by screws, clamps, glues, form-locking, force-locking or the like. Also, for instance, separate brackets or the like may be used to this end.
  • a second opening 53 — 56 is provided, for connecting of, respectively (see Fig. 10):
  • connection 70 for a supply of a space heating circuit 71 and/or a tap water supply 72 so that water can be led from the water-carrying channels 10 via the outlets 3 and the first channel 40 to above-mentioned connection 70;
  • a second connection 75 for instance a water supply 76 and/or a return pipe 77 of a space heating circuit 71 and/or a tap water heating circuit 72 so that, therefrom, water can be introduced into the different water-carrying channels 10 via the third channel 42 and the inlets 6; and
  • the two ends 57, 58 of the channels 40 — 43 can be closed off by closing plates 59, 60 (Fig. 10).
  • a condensation outlet 61 is provided on the bottom side, below each channel part 12, a condensation outlet 61 is provided.
  • a second extrusion profile 62 with again a length adjusted to the combined length of the members 1 extends below the members and is provided with a series of openings 63 (three in the example shown) which can connect to the condensation outlets 61 so that condensation can simply be collected and discharged.
  • Figs. 7 — 9 show an alternative embodiment of a member 1 according to the invention, for which substantially only the differences with the embodiment according to Figs. 1 — 6 will be described.
  • Figs. 7 — 9 show an alternative embodiment of a member 1 according to the invention, for which substantially only the differences with the embodiment according to Figs. 1 — 6 will be described.
  • reference numerals not discussed here reference is made to the above description.
  • the top surface 31 is substantially flat but only the outlet 3, the burner position 4 with the burner 5 and the inlet 6 are provided therein.
  • the flue gas exhaust 7 is provided on the front side (in Fig. 7 on the right side), in a plane approximately at right angles to the top surface 31.
  • an upstanding edge 3A, 4A, 6A is provided which can serve as sealing for a first, second and third channel 40, 41 and 42.
  • the profile 44 comprises only the first, second and third channel 40, 41 and 42.
  • the flue gas exhausts can be connected to a chimney 78 in a different manner, for instance by individual pipes or by a second profile extending along the members in a similar manner.
  • the fourth channel 43 may of course also be included in the extrusion profile 45, for instance by designing that profile 45 so as to be angular.
  • Fig. 8 shows a heat exchanger 30 built up from three members 1, with two closing plates 15, 16.
  • the closing plates are, for instance, screwed against the members 1, so that they can be removed for, for instance, inspection and cleaning.
  • a sight glass may be provided in one of the closing plates, preferably near the igniter 17.
  • the profile 44 has three channels 40, 41 and 42, separated by walls 47, 48 and enclosed between top and bottom wall 45, 46. Openings 49 — 51 are again provided for connection of a first and second connection 70, 75 and the gas or gas/air connection 73. As appears from the top view, the openings 49 - 51 (and 52 in Figs.
  • Fig. 10 shows a schematic representation of a heating apparatus 100 with a heat exchanger 30 according to the invention, with five members. The different parts are designated by the reference numerals mentioned above.
  • the heat exchanger 30 is included in a housing 80, together with a control 81.
  • a condensation drain 82 is shown schematically, connected to profile 62.
  • the tap water supply 72 is designed with a heat exchanger but may of course be provided in any desired manner or be omitted.
  • the space heating 71 is shown as central heating but may also be designed in a different manner or be omitted. Modifications thereof are readily apparent to a skilled person.
  • a segment or member 1 according to the invention may have a weight of 2 to 2.5 kg and be manufactured from aluminum alloy conventional in heating technology.
  • a member may have outer dimensions, measured over the largest height, depth and width of, for instance, 200 by 230 by 80 mm, while, per member 1, for instance a capacity of about 7 kW can be reached. So, with four members, this means a width of 320 mm and a capacity of 28 kW.
  • By adjustment of the number of members that capacity can be increased or decreased as desired.
  • members with different capacities may also be used.
  • two different members may be combined, which, for instance, differ from each other only in capacity, in different numbers, so that, with only two different members, a still greater variety of powers can be achieved.
  • a burner 5 may be provided, with a circular shape or a cylindrical shape.
  • Such a burner 5 may have a relatively small burner cover 33, for instance between 20 and 2000 mm 2 , more in particular between 100 and 1000 mm 2 .
  • the burner may have a diameter of about 25 to 30 mm and a height of 10 to 15 mm. Of course, these dimensions may be adjusted as desired.
  • the first, second, third and fourth channel may, for instance, be accommodated in separate profiles or, for instance, in pairs. These may also be cast, drawn or be manufactured in a different manner. They are preferably straight but may also include an angle.
  • the top surface may have a stepped or bent design, provided that the channels of the or each profile are adjusted thereto.
  • the different openings may be provided in other positions.
  • Other materials may be used for the members and the channels. Preferably, however, aluminum or an alloy thereof is used.
  • the water- carrying channels are shown with a closing wall 13 on two sides. However, it will be clear that these may also be omitted on one or two sides, provided that the gaskets included between the members and the closing plates are adjusted thereto. Such modifications will be readily apparent to a skilled person.
  • each member 1 has only one water- carrying channel. Of course, this may also be two or more, for instance for separate water circuits.
  • members may be designed without a burner.
  • the flue gas exhaust may extend in a direction different from

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Abstract

L'invention concerne un échangeur de chaleur composé d'une série d'éléments couplés les uns aux autres. Ces éléments comprennent chacun une chambre de brûleur avec une position de brûleur, une zone d'échange de chaleur, un orifice d'amenée de gaz de combustion, un circuit d'échappement du gaz de combustion et un circuit d'eau comportant une entrée et une sortie. Les éléments sont conçus pour comprendre un brûleur qui s'étend au moins partiellement dans la chambre de brûleur respective. Les chambres de brûleur des éléments juxtaposés communiquent entre elles. Un premier, un deuxième et un troisième canal relient les entrées, les sorties et les entrées de gaz/d'air des différents éléments, respectivement.
EP06783828A 2006-07-07 2006-07-07 Échangeur de chaleur de structure modulaire et son procédé de formation Withdrawn EP2038586A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/NL2006/000343 WO2008004855A2 (fr) 2006-07-07 2006-07-07 Échangeur de chaleur de structure modulaire et son procédé de formation

Publications (1)

Publication Number Publication Date
EP2038586A2 true EP2038586A2 (fr) 2009-03-25

Family

ID=38787551

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06783828A Withdrawn EP2038586A2 (fr) 2006-07-07 2006-07-07 Échangeur de chaleur de structure modulaire et son procédé de formation

Country Status (2)

Country Link
EP (1) EP2038586A2 (fr)
WO (1) WO2008004855A2 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT505074B1 (de) * 2007-03-30 2009-09-15 Vaillant Austria Gmbh Wärmeaustauscher für brennwertheizgerät
NL2010725C2 (en) 2013-04-26 2014-10-29 Dejatech Ges B V Modular heat exchanger with sections interconnected by connectors.
EP3036484B1 (fr) 2013-08-20 2017-08-30 Bekaert Combustion Technology B.V. Échangeur de chaleur sectionnel à utiliser dans une pile thermique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948838A1 (de) * 1979-12-05 1981-06-11 Wilhelm Dipl.-Ing. 8114 Uffing Schirmer Heizkessel
IT230419Y1 (it) * 1993-09-22 1999-06-07 Ferroli Spa Caldaia perfezionata per riscaldamento,a struttura modulare, particolarmente studiata per ridurre l'emissione delle sostanze
NL1003624C2 (nl) * 1996-07-17 1998-01-21 Holding J H Deckers N V Gelede verwarmingsketel en verwarmingsinrichting, voorzien van een dergelijke ketel.
DE29712049U1 (de) * 1997-07-09 1997-09-11 August Brötje GmbH, 26180 Rastede Gasheizkessel für den Brennwertbetrieb

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008004855A2 *

Also Published As

Publication number Publication date
WO2008004855A3 (fr) 2008-03-13
WO2008004855A2 (fr) 2008-01-10

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