WO2007142527A2 - Échangeur de chaleur et appareil de chauffage équipé de celui-ci - Google Patents

Échangeur de chaleur et appareil de chauffage équipé de celui-ci Download PDF

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Publication number
WO2007142527A2
WO2007142527A2 PCT/NL2007/050271 NL2007050271W WO2007142527A2 WO 2007142527 A2 WO2007142527 A2 WO 2007142527A2 NL 2007050271 W NL2007050271 W NL 2007050271W WO 2007142527 A2 WO2007142527 A2 WO 2007142527A2
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
heat exchange
exchange element
exchanger according
parts
Prior art date
Application number
PCT/NL2007/050271
Other languages
English (en)
Other versions
WO2007142527A3 (fr
Inventor
Karel Hubau
Hugo Lievens
Paul Thijssen
Jan Van Peteghem
Original Assignee
Nv Bekaert Sa
Bekaert Combustion Technology B.V.
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 Nv Bekaert Sa, Bekaert Combustion Technology B.V. filed Critical Nv Bekaert Sa
Priority to EP07747494A priority Critical patent/EP2035756A2/fr
Priority to US12/303,393 priority patent/US20100000725A1/en
Publication of WO2007142527A2 publication Critical patent/WO2007142527A2/fr
Publication of WO2007142527A3 publication Critical patent/WO2007142527A3/fr

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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
    • F24H1/41—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes in serpentine form
    • 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
    • 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
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49377—Tube with heat transfer means

Definitions

  • the invention relates to a heat exchanger.
  • heat exchangers for, for instance, heating apparatus, hot water supplies and the like from, for instance, steel or iron or light metal such as aluminum.
  • a casting method is applied here. Casting techniques offer a relatively large design choice but complex casting moulds.
  • heat transfer increasing elements are provided in a flue gas channel, which elements are cast integrally in the casting moulds, at least when casting techniques are used. The heat transfer is then not always optimal.
  • the object of the invention is to provide a heat exchanger.
  • a heat exchanger in a first aspect, is characterized in that a body is provided with at least one flue gas channel and at least one water carrying channel, at least one burner chamber and at least one flue gas discharge, wherein the at least one flue gas channel extends at least partly between the at least one burner space and at least one flue gas discharge, and at least one portion of the at least one flue gas channel comprises at least one porous or gas transmissive heat exchange element.
  • a porous or gas transmissive heat exchange element is understood to mean an element with a structure and/or manufactured from a material with continuous openings, such that gas can flow through the heat exchange element(s), from, in flow direction, a side proximal to the burner space to a side proximal to the flue gas discharge.
  • the openings can comprise, for instance, pores and/or channels.
  • a first part of the heat exchange element, or with several successive elements, a first heat exchange element, adjacent the burner space can have a relatively low porosity and high density, for instance a density of more than 70%
  • a second part of the heat exchange element or, in flow direction, a trailing second heat exchange element can have a relatively low density and high porosity, for instance a porosity of more than 70%.
  • At least two successive zones are formed in the flue gas channel, with different average porosity and/or density.
  • These values mentioned should not be taken as being limitative in any manner and serve merely as an example.
  • a skilled person can chose and calculate suitable values.
  • the invention provides a first part of a heat exchange element wherein the minimal thicknesses and/or cross-sections of the at least one heat exchange element of the first part are, in fact, greater than those of the at least one heat exchange element of the second part. This serves the purpose of providing a more massive first heat exchange element, which can resist the high temperatures of the combustion gases.
  • a heat exchanger according to the invention is characterized in that the or at least one heat exchange element is manufactured at least partly utilizing metal foaming.
  • the entire, or all heat exchange elements that are placed in a flue gas channel are manufactured utilizing metal foaming.
  • the at least one heat exchange element can comprise fibers, in particular metal fibers.
  • Such fibers can be from, for instance, metal or ceramics and be processed into a porous mass, for instance a woven or non-woven element.
  • the fibers ensure a relatively large contact surface in relation to the volume, in particular if the fibers are relatively thin, for instance an average thickness of less than 1 micrometer to a few tens or hundreds or micrometers.
  • the fibers Preferably, have an average thickness of between 0.5 and 200 micrometer, more particularly between 0.5 and 50 micrometer.
  • a heat exchange element can be utilized that is at least partly sintered.
  • a heat exchanger according to the invention is characterized in that body parts are provided which are manufactured at least partly through extrusion or through casting techniques. Light metal, such as aluminum or an alloy thereof, can then be utilized.
  • the invention is characterized in that at least one, and preferably each body part is provided with recesses, in particular on a side remote from the flue gas channel, in which parts of a second water carrying channel part are formed or included.
  • the aspects mentioned and other aspects of the invention can be utilized separately as well as in combination.
  • the invention further contemplates providing a body part for such a heat exchanger, and a heat exchange element therefore.
  • the invention furthermore contemplates providing a method for the manufacture of a heat exchanger.
  • a method is characterized in that at least two body parts are formed, in particular through extrusion or casting techniques, which body parts each comprise at least a portion of a water carrying channel part, which body parts are mutually connected by end parts and/or at least one heat exchange element, such that the body parts are thus held at a mutual distance from each other while forming a flue gas channel in which said at least one heat exchange element extends, and preferably the water carrying channel parts in the two body parts are mutually connected.
  • one body part can be utilized in which the entire flue gas channel is formed, which is at least partly filled with at least one at least partly porous or otherwise gas transmissive heat exchange element.
  • Figs. IA and B show, in front and side view, a heat exchanger without side parts;
  • Fig. 2 shows, in perspective view, a heat exchanger according to
  • Fig. 2A shows, in slight enlargement, a part of a heat exchanger according to Fig. 2;
  • Fig. 3 shows, in front view, a heat exchanger, in a second embodiment, without side parts
  • Fig. 4 shows, in perspective side view, a heat exchanger according to Fig. 3;
  • FIG. 4A shows, in slight enlargement, a portion of a heat exchanger according to Fig. 4;
  • Fig. 5 shows, in perspective view, a body part for a heat exchanger according to Figs. 1 - 2;
  • Figs. 5A and 5B show embodiments of a heat transferring element according to the invention
  • Figs. 5C and 5D schematically show, in side view and front view, an alternative embodiment of a heat transferring surface increasing element
  • Fig. 6 shows, in perspective view, a body part for a heat exchanger according to Figs. 3 - 4;
  • Fig. 7 shows, in side view, an alternative embodiment of a heat exchanger according to Fig. 1; and Fig. 8 schematically shows a heating apparatus with a heat exchanger, in particular according to Fig. 7.
  • a body 1 of a heat exchanger 1 is shown, assembled from two body parts 3, 4 and a burner hood 5 with burner deck 6.
  • the body parts 3, 4 and preferably also the burner hood 5 are preferably manufactured from aluminum or an alloy thereof, although they can also be manufactured from other material, such as iron or steel.
  • the body parts 3, 4 are manufactured substantially through extrusion. This is a simple and relatively inexpensive manufacturing method. However, casting is an option too.
  • the body parts 3, 4 have a substantially constant cross-section in one direction, in Figs. IA and 3 at right angles to the plane of the drawing.
  • a suitable gasket (not shown) may have been inserted for a flue gas-tight sealing.
  • a central opening 10 is provided, through which, during use, gas or a gas/air mixture can be introduced to be burned, so that heated flue gases are obtained, formed in a flue gas channel 11 between the two body parts 3, 4 as will be described hereinafter.
  • the body 2, in particular the body parts 3, 4 each comprise a first part 12 and a second part 13, which here, link up with each other.
  • the first part 12, viewed in front view as in Fig. IA, has a meandering configuration.
  • each of the body parts 3, 4 comprises a series of bends 14, in the embodiment shown four bends 14A— D, 15 A - D, respectively.
  • the meandering configuration is designed so as to be somewhat sinusoidal.
  • Each body part has an outside 16 and an opposite side 17 proximal to the flue gas channel 11.
  • the meandering first part can therefore have elevations 18 and lows 19.
  • elevations 18 are seen the parts located furthest from a central plane V, and, as lows, the parts located therebetween.
  • a plane V can be seen, extending approximately midway between two imaginary planes Vl and V2, with the planes Vl and V2 extending parallel to each other over the elevations 18 located furthest from the plane V of the respective body parts 3, 4.
  • the configuration of the body parts 3, 4 and the channels 11 is, in fact, a zigzag configuration so that a large heat transferring surface can be obtained in a compact space.
  • the first part 12 can also have a different, for instance straight configuration, in the sense that no bends or meanderings are included, while the first part 12 and the second part 13 have a parallel flow direction, or can mutually include an angle.
  • the length of the flue gas channel 11 in the flow direction from the burner space B to the flue gas discharge R will be smaller than in an embodiment where indeed a meandering part 12 is included, but a reduced flow resistance can be formed.
  • the second part 13 of the each body part 3, 4 has a substantially straight form, with an outside 16 and an opposite side 17 proximal to the flue gas channel 11.
  • the plane V extends midway between these two body parts 3, 4. However, this may also be offset over a distance relative therefrom, to the left or the right, in side view.
  • the heat exchange element(s) extend(s) in the flue gas channel 11 and/or partly define this, and are porous or gas transmissive such that, during use, flue gases can flow through the or each heat exchange element while exchanging heat.
  • the porosity or the gas transmissivity of the elements 20 a greater contact surface is obtained between heated flue gases in the flue gas channel 11 and the surface 17 and/or heat transfer increasing elements provided thereon. If several heat exchange elements are utilized, they can be placed both one behind the other and side by side in flow direction.
  • one or more heat exchange elements 20 can be provided, preferably with a porosity that is higher than that of the or a heat exchange element 20 in the second part 13.
  • porous is at least understood to include manufactured from a material and/or with a method such that open pores are provided that are in communication with each other and are, for instance, continuous.
  • gas transmissive is at least understood to include an element provided with channels or such continuous openings through which flue gases can flow, while exchanging heat to the environment, in particular to the respective element, such as for instance foams, fins, fiber mat.
  • the porosity and density can be expressed in a percentage, while with porosity, the percentage represents the part of the volume not filled by the solid material such as metal and, hence, suitable for through-flow by flue gases. For the density, the percentage signifies the part formed by the solid material.
  • the or each heat exchange element 20 is at least partly formed through metal foaming, as schematically shown in Fig. 5B, so that a porous mass is obtained that can be manufactured or brought into a desired form, for instance by mechanical and/or removing operations. With it, an optimal shape for the heat exchange elements can be obtained, with optimal abutment against the inside 17 of the second part 13.
  • Metal foam can offer a relatively robust element that may be constructively advantageous and can ensure a good heat exchange between the flue gases and the metal, and a good transfer to the elements 3, 4.
  • metal foaming is sufficiently known from practice, as are the means to then create and influence, for instance, porosity, so that in each part of an element obtained through metal foaming, a desired predetermined porosity can be achieved, in any case on average.
  • fibers are used for the heat exchange element, as schematically shown in Fig. 5A, for instance metal fibers or ceramic fibers.
  • a woven or non-woven element can, for instance, be formed therefrom.
  • the elements 20 can be at least partly formed by removing or non-removing operations of the body parts or, when for instance a casting process is utilized for forming the body parts, through integral forming, in particular casting, during manufacture, while for forming the elements, gas can for instance be blown through the liquid material.
  • ribs can be extruded.
  • porous and/or gas transmissive materials can be used, such as metals or ceramic filling materials.
  • the heat transferring surface increasing elements are represented in a simplified manner as rectangles. The design of such elements can simply be selected by skilled person.
  • Fibers for an element 20 according to the invention can be at least partly manufactured through drawing or extrusion, in particular through bundle drawing or multi fiber extrusion, through hot drawing from a weld pool, through cold or through hot rolling, a removing and/or pressing techniques and/or through foaming or blowing.
  • the or a heat exchange element can at least partly be manufactured from a woven or a non-woven material, for instance from fibers, in particular metals and/or ceramic fibers. It is preferred that a heat exchange element 20 according to the invention is at least partly sintered, so that an element is obtained which is heat and moisture resistant and can be placed as a unit.
  • a heat exchanger use is preferably made of zones that succeed each other in flow direction s, in which zones the heat exchange can be different.
  • the porosity or density of the respective heat exchange element 20 or part thereof extending in a respective zone I, II can deviate from that in a different zone.
  • two zones I, II are shown.
  • the first zone can for instance extend in the first part 12 and the second zone in the second part 13, as shown in Fig. 1, or both zones I, II can extend in the second zone 13 as shown in Fig. 3, with the first part 12 not comprising a porous heat exchange element.
  • the first zone I can for instance have a porosity of less than 70%, and a relatively high density of, for instance, more than 70%, for instance 95%, while then, the second zone II has, for instance, a relatively low density, for instance less than 70%, and a relative high porosity, such as over 70%, more particularly for instance 95%.
  • the flow resistance will decrease in flow direction.
  • heated flue cases will give off the greatest part of the heat, be cooled from, for instance, well over above 1000 0 C, for instance approximately 1600 0 C, to well over 1000 0 C, for instance to approximately 450 0 C.
  • the heat exchange will be continued so that the flue gases can be cooled down further, for instance to a condensing temperature.
  • metal foaming offers the advantage that a heat exchange element clamped only against the parts 3, 4 ensures a particularly good heat transfer when compared to, for instance, fins or plate parts.
  • different heat exchange elements with different porosities and/or densities can be placed side by side and/or one behind the other, or the porosity and/or density in a heat exchange element can be varied.
  • parts 21 of a water carrying channel 22 are provided in the first part 12 and the second part 13.
  • these parts 21 are all tubular with a constant cross-section, which have a longitudinal direction L, approximately at right angles to the plane of the drawing in Figs. IA and 3, which longitudinal direction L is parallel to an extrusion direction for the body parts, if these are extruded.
  • Adjacent the first end 7, in each body part 3, 4, a first part 21A is provided as the beginning of the meandering first part 12, directly below the burner deck 6.
  • two parts 2 IB are provided in the second part 13.
  • the channel parts 21 on both sides of the flue gas carrying channel 11 are mutually connected for forming a channel 22 circumventing the heat exchanger, but, optionally, the channel parts on both sides of the flue gas carrying channel 11 can also, each, form a channel part 22 that can be used for, for instance, different heat exchange circuits, or be mutually connected outside the heat exchanger 1.
  • heat transferring surface increasing elements can be utilized which can be integrally formed especially through extrusion, while the channel parts themselves need not be divisible, while to that end, also, porous materials and/or elements can be used as described hereinabove.
  • the channel parts 21 are mutually connected through end hoods 24 and connecting channel parts extending therein (Fig. 8).
  • These end hoods 24 may further comprise the connections for the heating circuits, gas and air supply pipes and the like.
  • the end hoods can simply be fastened, with interposition of suitable gaskets, against the sides of the parts 3, 4 arranged side by side, so that a flue gas channel 11 closed towards the sides and a continuous water channel 22 or water channels 22 are obtained, while furthermore, the parts 3, 4 are held in a suitable position and at a suitable distance.
  • the channel parts 21 are provided on the outside of the parts 3, 4, so that the sides thereof facing inwards, i.e. towards the flue gas channel 11, can be designed to be relatively flat, at least without protrusions formed by the channel parts. They can, however, also be positioned differently, for instance partly outside and partly inside the flue gas channel 11 or entirely inside the flue gas channel 11. This holds both for the individual channel parts and for the assembly thereof.
  • the or each channel 22 is laid out such that it can function in counterflow to the flow direction of the flue gases through the flue gas channel 11, so that an improved efficiency can be obtained.
  • the through-flow opening in the different channel parts can be adjusted in order to generate a flow speed change in the channel, for a further optimisation of the heat exchange.
  • each of the parts 3, 4 in the first part 12 has a meandering flow gas channel part HA formed between bends 14A - D, 15A- D respectively, formed such that five flue gas sub channel parts HA 1 - 11A 5 are obtained, which are mutually connected by bend parts HB and extend approximately parallel to each other.
  • two water channel parts 21 are included, parallel to each other, located at a distance D from each other, between a relatively wide first flue gas sub channel part HA 1 linking up with the burner deck 6 of the burner 5 and a second flue gas sub channel part HA 2 located therebeneath, respectively, and between a third flue gas sub channel part HA 3 and a fourth flue gas sub channel part HA 4 located therebeneath, respectively.
  • These water channel parts 21 are located, for instance, adjacent the bends HB.
  • channel parts 21 are provided at a distance D from each other, between the second flue gas sub channel partllA 2 and a third flue gas sub channel part HA 3 located therebeneath and between, at least under, the fourth flue gas sub channel part HA 4 and a fifth flue gas sub channel part HA 5 located therebeneath, respectively.
  • the channel parts are therefore always in communication by at least one, and in most cases, two flue gas sub channel parts HA 1 - HA 5 , for optimal heat exchange.
  • the burner deck is at an angle ⁇ relative to the plane V, for instance between 20 and 85°. In the exemplary embodiment shown, this angle is approximately 30°.
  • further heat transfer increasing elements 2OA can be provided, in the form of, for instance, ridges, projections or fins, whose intermediate passages are for instance disposed in the flow direction of the flue gases, or at an angle thereto.
  • These heat transfer increasing elements 2OA which can also be utilized in the other or alternative embodiments, form, in principle, a porous surface, viewed in flow direction of the flue gases.
  • the elements 2OA preferably form at least approximately 70% of this surface so that the passages therebetween form less than 30%. More particularly, preferably 70% of the volume of the volume described by the elements 2OA is filled by the material of the elements 2OA.
  • the minimal measured thicknesses/cross-sections of the portion of the surface that is not porous, is greater than 3 mm, preferably greater than 5 mm or 1 cm, respectively.
  • FIG. 5A schematically, a side view of a portion of an element 20 is shown, in which fibers 40 are clearly recognizable, which can form a regular or, as shown, an irregular pattern and define continuous pores 41.
  • Fig. 5B schematically shows, in side view, a portion of an element 20, in particular manufactured through metal foaming, wherein material 42 is clearly recognizable, in which continuous pores 41 are recognizable.
  • the metal foams are made of aluminum of an aluminum alloy.
  • FIGs. 5C and D schematically show alternative embodiments of a heat transferring element 20 in two views at right angles to each other, which element 20 comprises a series of profile parts 45 which form at least an undulating and/or ribbed part 43.
  • This part 43 or at least the profile parts are preferably formed with ribs and/or undulations from folded and/or bent plate material, for instance steel or aluminum or a porous material, for instance a woven or non-woven fiber-based material as described hereinabove.
  • This undulating and/or ribbed part may have been formed from at least one plate or a series of plates which is or are folded such that always a channel 44 is confined by a plate part 45 and a part, for instance wall 17, of the heat exchanger against which the part 43 is provided, which channel 44, in cross- section, preferably has a substantially triangular or trapezoid-shaped section and, in a longitudinal direction at right angles to said cross-section, has a somewhat meandering configuration, as is clearly visible in Fig. 5C, so that each time, the flow direction of flue gases is changed and a good heat exchange can take place.
  • channels 44 in a part 43 according to Figs. 5C and 5D can have a different configuration, for instance less angularly undulating, or having acuter angles, of, for instance, 30, 45, 60 or 90 degrees or therebetween.
  • the channels 44 can have a main direction Gl which is approximately parallel to the flow direction of flue gases HGl from the burner chamber to the flue gas discharge, but can also include an angle thereto of, for instance, 30, 60 or 90 degrees, or therebetween.
  • Several parts 43 can be stacked on top of each other, for obtaining a larger element 20, while the main direction of the channels of a underlying plate can, each time, be turned relative to the main direction S of an overlying plate, so that the through-flow of flue gases is hardly adversely affected, if at all.
  • the angle of torsion can, for instance, be some degrees to some tens of degrees, or more.
  • the parts 43 can have the plate parts 45 facing each other or even abutting each other, but can also, each time be, separated by, for instance, a plate 46, preferably a porous plate.
  • a heat exchanger according to Figs. 1 and 2 is shown as an example while, however, a second water carrying channel 26 is provided.
  • grooves 27 and/or ribs 28 are provided on the parts 3, 4, between the first water carrying channel parts 21, for forming recesses in which a pipe 29 such as a metal or plastic pipe is secured, for instance through clamping, form- closing, gluing, welding or in another manner.
  • the second water carrying channel 26 can be used for, for instance, tap water.
  • the second (or, optionally, further) water carrying channel 26 can, for that matter, also be integrally formed into the parts 3, 4 comparable to, for instance, the first channel 22, if the used material allows this or, for instance, when the water or other medium to be heated therein is not used for consumption but for an indirectly heated boiler, floor or wall heating or the like.
  • the grooves and/or ribs extend parallel to the water carrying channel parts 21, so that extrusion is possible in simple manner.
  • parts 3, 4 can be advantageously formed through extrusion, separately or jointly. With it, a relatively simple and economically advantageous production of such heat exchangers is possible. However, naturally, also other production manners can be utilized, such as casting, injection moulding and/or removing, so that somewhat more complex shapes become possible. Preferably, the parts 3, 4 can be separated relatively easily, so that cleaning is simplified. To that end, the parts 3, 4 can be mutually screwed or clamped. This holds in particular also for the lowest, condensing part.
  • FIG. 8 in top plan view, schematically, a portion of a heating apparatus 25 with a heat exchanger according to the invention is shown, in a highly simplified manner, connected to two heating circuits.
  • a first heating circuit 30 is, for instance, a space heating circuit with radiator 36, connected to the water carrying channel 22, in which a first pump 31 is provided.
  • a second heating circuit 32 is, for instance, a tap water heating circuit with tap 37 and, optionally, a second pump 33.
  • a supply device for, for instance, gas and air is connected to the burner chamber 5, for forming a premix burner. Naturally, only gas or another fuel can also be supplied. Adjacent the underside of the heating apparatus 25, to the flue gas passage 11, a condensation discharge 34 as well as a flue gas discharge 35 may be connected.
  • a porous material or element in one or more flue gas channels, can be included for increasing the heat transferring surface.
  • the porosity can also, for instance, decrease in the flow direction of the flue gases, i.e. in the direction of the flue gas discharge, so that, at the beginning of the flue gas channel, hotter gases will flow through faster and, according as they cool down, the through-flow will be somewhat delayed.
  • Many variations thereon are possible through variation of, for instance, the porosity, the through-flow surface, the extent to which the flue gas channel is filled with porous material and/or the porous elements and the like.
  • the meandering parts of the heat exchanger can have a different design and materials other than aluminum or an aluminum alloy can be utilized, for instance other (lighter) metals or ceramic materials. More or fewer water carrying channel parts may be provided, while the number of bends and the shape thereof can be adjusted to, for instance, the desired capacity.
  • a different burner can be utilized, for instance a known premix burner, which can be directly connected to the flue gas channel, in particular within the embodiment of the first flue gas sub channel part as shown in Figs.
  • the flue gas channel can have a decreasing or, conversely, increasing passage in the direction of the flue gas discharge, in order to influence the speed of the flue gases and, hence, the heat exchange.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (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, comprenant un corps avec au moins une conduite de gaz de combustion et au moins une conduite de transport d'eau, au moins un espace pour un brûleur et au moins une évacuation des gaz de combustion, ladite ou lesdites conduites de gaz de combustion s'étendant au moins partiellement entre ledit ou lesdites espaces de brûleur et ladite ou lesdites évacuations des gaz et au moins une partie de ladite ou lesdites conduites de gaz de combustion comprenant au moins un élément d'échange de chaleur poreux ou permettant la transmission des gaz.
PCT/NL2007/050271 2006-06-08 2007-06-08 Échangeur de chaleur et appareil de chauffage équipé de celui-ci WO2007142527A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07747494A EP2035756A2 (fr) 2006-06-08 2007-06-08 Échangeur de chaleur et appareil de chauffage équipé de celui-ci
US12/303,393 US20100000725A1 (en) 2006-06-08 2007-06-08 Heat exchanger and heating apparatus provided therewith

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NL1031968 2006-06-08
NL1031968 2006-06-08
NL1033254 2007-01-18
NL1033254 2007-01-18

Publications (2)

Publication Number Publication Date
WO2007142527A2 true WO2007142527A2 (fr) 2007-12-13
WO2007142527A3 WO2007142527A3 (fr) 2008-01-31

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PCT/NL2007/050271 WO2007142527A2 (fr) 2006-06-08 2007-06-08 Échangeur de chaleur et appareil de chauffage équipé de celui-ci

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WO2009053248A1 (fr) * 2007-10-25 2009-04-30 Bekaert Combust. Technol. B.V. Corps poreux métallique incorporé par coulée dans un échangeur de chaleur
NL1035654C2 (nl) * 2008-07-03 2010-01-12 Intergas Heating Assets B V Warmtewisselaar.
EP2072931A3 (fr) * 2007-12-21 2012-04-04 A.M. S.R.L. Échangeur de chaleur particulièrement adapté pour la construction de chaudières de chauffage de type à condensation haute efficacité

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WO2015077490A1 (fr) * 2013-11-20 2015-05-28 Carl Schalansky Procédé d'utilisation de matériaux de fabrication additive pour la production de canaux d'écoulement de fluide
JP7356024B2 (ja) * 2019-12-24 2023-10-04 株式会社ノーリツ 熱交換器及び温水装置

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WO2009053248A1 (fr) * 2007-10-25 2009-04-30 Bekaert Combust. Technol. B.V. Corps poreux métallique incorporé par coulée dans un échangeur de chaleur
EP2072931A3 (fr) * 2007-12-21 2012-04-04 A.M. S.R.L. Échangeur de chaleur particulièrement adapté pour la construction de chaudières de chauffage de type à condensation haute efficacité
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Also Published As

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US20100000725A1 (en) 2010-01-07
WO2007142527A3 (fr) 2008-01-31
EP2035756A2 (fr) 2009-03-18

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