EP2366971A1 - Appareil de chauffage par condensation et évent à gaz combustible avec échangeur de chaleur - Google Patents

Appareil de chauffage par condensation et évent à gaz combustible avec échangeur de chaleur Download PDF

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Publication number
EP2366971A1
EP2366971A1 EP10195892A EP10195892A EP2366971A1 EP 2366971 A1 EP2366971 A1 EP 2366971A1 EP 10195892 A EP10195892 A EP 10195892A EP 10195892 A EP10195892 A EP 10195892A EP 2366971 A1 EP2366971 A1 EP 2366971A1
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EP
European Patent Office
Prior art keywords
heat exchanger
flue gas
flue
heat
concentric
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Withdrawn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
EP10195892A
Other languages
German (de)
English (en)
Inventor
René Bertinus Joannes Kemna
Robertus Cornelis Adrianus Van Holsteijn
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.)
Muelink and Grol BV
Original Assignee
Muelink and Grol 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 Muelink and Grol BV filed Critical Muelink and Grol BV
Publication of EP2366971A1 publication Critical patent/EP2366971A1/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/04—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being formed by spirally-wound plates or laminae
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0007—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0006—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the plate-like or laminated conduits being enclosed within a pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
    • F28D9/0018—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form without any annular circulation of the heat exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box
    • F28F9/0268—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box in the form of multiple deflectors for channeling the heat exchange medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels

Definitions

  • the invention relates to an assembly comprising a condensing heating appliance provided with a burner and a heating appliance heat exchanger.
  • US 4.175.518 describes a hot water boiler provided with a flue.
  • the flue is interrupted by means of a flared housing in which a heat exchanger coil is fitted.
  • Water from the boiler circulates through this heat exchanger coil. Since water from the boiler is circulated through the heat exchanger, heated or preheated water will generally be recirculated, whereby the heat extraction capacity of the heat exchanger will be limited. In addition, pumping capacity will be necessary for the circulation of the water.
  • the heat exchanger is provided with a set of diffuser plates at the inlet and outlet, so that the resistance of this device will be considerable.
  • the system according to this document also recirculates the hot, already heated water without it being tapped. As a result, energy loss occurs.
  • GB 2.116.299 describes a boiler provided with a heat exchanger in the flue.
  • water from a cold water storage tank is fed in counterflow through a heat exchanger present in the flue, so that this cold storage water is heated as it is fed back to the storage tank.
  • a further cladding is fitted around the flue, whereby further heat is recovered.
  • Air from a building is fed along the flue and fed back into the building. Since a water supply of cold water from a large storage vessel is recirculated along the heat exchanger, the effect will ultimately be limited.
  • US 3.916.991 describes a gas furnace provided with a flue in which a heat exchanger is fitted.
  • a flue is provided with an inner pipe which over a portion of its length is perforated.
  • a coiled heat exchange duct is wound around this inner pipe.
  • An insulated outer pipe is then fitted around this whole.
  • the water which is circulated through the heat exchanger then surrenders its heat again via a secondary radiator, for example in order to heat a room within a building.
  • Such a device demands a pump with considerable capacity.
  • the resistance of such a device, as a result of the perforated pipe is considerable.
  • the efficiency of the device is limited.
  • WO 2005/106331 describes a heat recovery system for a waste gas flow.
  • a flue according to the document is surrounded by a water space.
  • a heat exchange coil is fitted around the waste gas pipe. Fitted around the water space is an insulating outer jacket.
  • the document is unclear about the exact working of the device, in particular the interaction between the water space and the heat exchange coil remains unclear.
  • US 7.360.507 describes an energy saving device which is coupled or connected to a standard gas boiler.
  • a helical heat exchange line is fitted around a flue, whereby feed water is preheated by means of waste gas.
  • a hot water tank of a boiler is here surrounded by a cladding. Between the hot water tank and the cladding is an air space and this is connected to a vent pipe.
  • This vent pipe is not the waste gas pipe. Hot air which escapes from the device via the vent pipe is led through a pipe surrounded by a heat exchanger. Thermal energy is hence recovered from air which escapes from the boiler device and which, according to the description, is not the waste gas of the heating burner.
  • WO 2006/059215 describes a device for the recovery of waste gas heat of a domestic boiler.
  • a flue is provided with a heat exchanger mounted therein, and the flue is provided with a further cladding, combustion air for the boiler being fed between these two claddings.
  • US 4.893.672 describes a heat exchanger having a series of helical tubes in a housing which is provided with an outlet standing at right angles to an inlet. An application of this heat exchanger is not discussed.
  • the heat exchanger with helical tubes is arranged such that not only does a liquid follow a helical path through the helical tubes, but also the medium which exchanges the heat therewith, since the helical tubes mutually connect. As a result of its design, the device has a relatively high resistance.
  • WO 2006/051266 describes a heat exchanger for a boiler.
  • the heat exchanger has a housing having a heat exchanger in a receptacle for condensation water of waste gases. This heat exchanger thus absorbs heat from the condensation water, which reabsorbs heat from the waste gases.
  • the efficiency of the heat exchanger is hereby limited, however.
  • US 2005/133202 describes a heat exchanger for a gas turbine, which is provided with a housing having an inlet and outlet in line.
  • a tube part provided with a butterfly valve is fitted in line with the inlet and outlet in the housing, with the bottom side and top side each at a distance from the inlet and outlet respectively. Wound helically around the tube is a number of tubes.
  • the tube part is provided to, under full load, lead the over-hot waste gas around the heat exchanger. In case of use for a high-efficiency combi boiler, such a facility is unnecessary.
  • JP-59-147993 describes a heat exchanger provided with a housing containing a pipe winding around a water drum. The helical tube emerges in the water drum. The pressure drop over the heat exchanger will once again be relatively large.
  • the object of the invention is to provide an improved heat recovery from waste gases.
  • a further or supplementary object of the invention is to provide an improved heat recovery from waste gases of a heating installation.
  • a further or supplementary object of the invention is to provide an improved heat recovery from waste gases of a heating installation which is insertable in flues of, for example, high-efficiency combi boilers.
  • a further or supplementary object of the invention is to provide an improved tapping output of, for example, high-efficiency combi boilers.
  • the invention provides an assembly comprising a condensing heating appliance provided with a burner, a heating appliance heat exchanger arranged to exchange at least a part of the heat of the combustion gases with a liquid flowing through the heating appliance heat exchanger, and a waste gas outlet, and further comprising a flue gas vent fitting connected up to the waste gas outlet, the said flue gas vent fitting comprising a thermally insulating housing provided with a flue gas inlet connecting end and a flue gas outlet connecting end positioned substantially opposite each other, in one embodiment in line with each other, and a heat exchanger in the housing and concentrically around the connecting line of the connecting ends, which heat exchanger is arranged to be, during operation, in heat-exchanging contact with the flue gas of the heating appliance and is provided with a heat exchanger inlet and a heat exchanger outlet, wherein the heat exchanger is provided with parallel-connected, mutually concentric heat exchange elements.
  • the efficiency is often already very high, certainly in the usual operating modes. In practice, however, a considerable heat loss through the waste gases is nevertheless evident.
  • the device according to the invention is especially suitable for use on existing installations ("retrofit"), as well as on existing designs of installations, so that the output thereof increases.
  • the widely varying flue gas flow in volume terms can ensure that the specially fitted heat exchanger is used optimally for only a limited part of the time.
  • These problems do not apply just to retrofit application, but also to newly produced boilers.
  • a stronger fan can, of course, be chosen, but this will give rise to increased electricity consumption on the part of the boiler, whilst an excessive increase in resistance on the sanitary fitting side remains a problem also for newly produced boilers.
  • the device according to the invention makes a flue-gas-side resistance of less than 20 Pa possible.
  • a heating appliance in which the outlined problems especially arise is a condensing heater provided with a burner, a heat exchanger for delivering at least a part of the heat of the combustion gases to a liquid, and a waste gas outlet.
  • a part of the heat is recovered from the combustion gases or waste gases by condensation of the water vapour in these gases.
  • the liquid to be heated is pre-heated by first bringing this into heat-exchanging contact with the waste gases.
  • the waste gas outlet is then after this in heat-exchanging contact.
  • the water vapour is formed by combustion of the hydrogen component in gases or liquids to be burnt, generally hydrocarbons. As set out above, the full condensation heat is not normally recovered.
  • the temperature of the waste gases of such a heating appliance is generally lower than about 90°C. In high-efficiency combi boilers, in particular, the waste gases will generally have a temperature below 65°C.
  • a heating appliance is a so-called “condensing boiler” or “high efficiency condensing boiler”.
  • a liquid normally water
  • the flue gas fitting of the invention is useful, in particular, on a high-efficiency combi boiler for domestic use.
  • a high-efficiency combi boiler normally has a housing comprising a burner, a heat exchanger in order to bring a fluid, normally water, into heat-exchanging contact with the hot waste gases of the burner, and a waste gas outlet, which guides the waste gases outside the housing.
  • inflowing air for the burner is pre-heated by bringing it into contact with outflowing waste gases.
  • domestic water is also heated, normally by means of a further domestic water heat exchanger.
  • a high-efficiency combi boiler normally has a control device which is operatively connected to a pump for the fluid, a pump for the domestic water, a supply of air and fuel to the burner. The control device is designed to mutually regulate these parts, so that the waste gas temperature remains relatively low, yet sufficient heating capacity is nevertheless delivered.
  • further temperature meters or temperature sensors are normally provided, which are operatively connected to the control device and which record the temperature of the outflowing fluid and the outflowing domestic water. Temperature probes can even be provided, which relay the inflow temperatures thereof to the control device.
  • Another problem concerns the evacuation of the condensation water. For some boilers, it is problematic when the said condensation water is drained back to the boiler via the flue gas vent, because the condensation water then re-evaporates and the recovered condensation heat is negated by the evaporation energy which is extracted there. And then there is still the problem of the physical applicability of the heat recovery unit on the flue gas side.
  • the flue gas vent fitting is further provided between the flue gas inlet connecting end and the heat exchanger with a concentric flow distributor, in one embodiment provided with mutually concentric flow distributor elements arranged to distribute flue gas over the concentric heat exchange elements, in a further embodiment the flow distributor comprises a plurality of concentrically placed cones, arranged to distribute the supplied flue gases over the heat exchange elements, including during part-load operation, in proportion to the heat-exchanging area of the individual concentric heat exchange elements.
  • the flow resistance of the concentric heat exchange elements for a through-flowing liquid is less in the outward direction.
  • the heat exchanger is provided on the water side with flow restrictions, which distribute the supplied water flow over the heat exchange elements in proportion to the heat-exchanging area of the individual concentric heat exchange elements.
  • the heat-absorbing capacity over the area of the heat exchanger is hence able to be adjusted; in one embodiment, through the adjustment of the flow resistance, the heat-absorbing capacity per unit of area for successive concentric heat exchange elements is substantially equal.
  • the flue gas vent fitting is further provided with a storage vessel for heat exchange fluid, mounted on the connecting line of the flue gas inlet connecting end and the flue gas outlet connecting end and in fluid connection with the heat exchanger outlet.
  • the diameter of the storage vessel is greater than or equal to the diameter of the flue gas inlet connecting end.
  • the storage vessel increases the heat-absorbing capacity of the flue gas vent fitting. By fitting the heat exchanger concentrically around the storage vessel and, moreover, choosing the diameter of the storage vessel greater than the flue gas inlet and flue gas outlet, it is possible to prevent the return flow of condensation water via the inlet of the flue gas vent fitting.
  • the storage vessel is circular-cylindrical.
  • the invention relates to a flue gas vent fitting with heat recovery function, comprising a thermally insulating housing, which is provided with a flue gas supply end and a flue gas evacuation end and in which a concentric heat exchanger is provided, wherein in the flue a course to a concentric annular passage is installed, and wherein the heat exchanger comprises concentric heat exchange elements, the smallest of which has an inner diameter which is greater than or equal to the diameter of the flue gas supply end.
  • the invention relates to a flue gas vent fitting comprising a thermally insulating housing provided with a flue gas inlet connecting end and a flue gas outlet connecting end positioned substantially opposite each other, in one embodiment in line with each other, and a heat exchanger in the housing and concentrically around the connecting line of the connecting ends, which heat exchanger is arranged to be, during operation, in heat-exchanging contact with the flue gas and is provided with a heat exchanger inlet and a heat exchanger outlet, wherein the heat exchanger is provided with parallel-connected, concentric heat exchange elements.
  • the heat exchanger comprises a multi-spiral heat exchanger with ribbed tubes. A larger heat-exchanging area is hereby formed.
  • the heat exchanger comprises a spiral plate exchanger containing vertical ribs or helical fitted ribs, which enlarge the heat-recovering area and improve the heat transfer and condensate evacuation.
  • the heat exchanger comprises concentric cylinders containing, in use, vertical ribs or helical ribs which enlarge the heat recovery area and improve the heat transfer and condensate evacuation.
  • the heat exchange elements on their outer side, are provided with a hydrophobic coating for the rapid evacuation of water droplets.
  • the flue-gas side passage which is left after the installation of the concentric heat exchanger, in particular the sum of the spaces between the different concentric heat exchanger segments, is here dimensioned, in terms of number and mutual spacing, such that the flue-gas-side resistance is thus adapted to the desired heat recovery efficiency.
  • the passage can be chosen such that the flue-gas-side resistance is less than 20 Pa.
  • the flue-gas-side passage which is left after the installation of the concentric heat exchanger, in particular the sum of the spaces between the different concentric heat exchanger segments, is here dimensioned, in terms of number and mutual spacing, such that a minimal flue-gas-side basic resistance is thereby realized, which, by means of a flow restriction to be placed on top of the concentric exchanger, is increased to the maximally permissible flue-gas-side resistance in order that the maximum recovery efficiency can be realized for each application.
  • the passage can be chosen such that the flue-gas-side resistance is less than 20 Pa.
  • the concentric heat exchanger is provided on the inflow side with a flue gas distributor, comprising in one embodiment a plurality of concentrically placed cones, arranged to distribute the supplied flue gases over the heat exchanger. including during part-load operation, in proportion to the heat-exchanging area of the individual concentric heat exchanger segments.
  • a flue gas distributor comprising in one embodiment a plurality of concentrically placed cones, arranged to distribute the supplied flue gases over the heat exchanger. including during part-load operation, in proportion to the heat-exchanging area of the individual concentric heat exchanger segments.
  • the heat exchanger is provided on the water side with flow restrictions, which distribute the supplied water flow over the heat exchanger in proportion to the heat-exchanging area of the individual concentric heat exchanger segments.
  • the flue gas heat exchange fitting comprises in the centre of the heat exchanger a water-holding container, in particular in the form of a cylinder, and having a diameter which is at least equal to the diameter of the flue gas supply end.
  • the flue gas distributor is provided with condensation water collection and evacuation facilities for the separate evacuation of condensation water, in vertical application and the prevention of backflow of the condensation water into the flue gas supply end.
  • the housing is provided with one or more condensate-collecting spaces having an evacuation facility coupled thereto, so that condensation water, both in the vertical and horizontal position of the product, can be collected and evacuated outside the housing.
  • the condensation water drain comprises a first discharge opening in liquid connection with the flue gas inlet connecting end, a second discharge opening in liquid connection outside the housing, and a shut-off valve by which the condensation water drain can be brought adjustably into liquid connection with the flue gas inlet connecting end and with the second discharge opening.
  • the condensation water drain comprises a duct having the first discharge opening, and the second discharge opening can be terminated upstream of the first discharge opening in the duct, which second discharge opening interrupts the duct. The condensation evacuation can hence be adapted to any desired use and appliance.
  • the flue gas vent fitting is directly coupled to a plate heat exchanger in the thermally insulating housing for heat transfer between central heating water and sanitary domestic water in the thermally insulating housing.
  • the flue gas vent fitting is further provided with an air feed duct, which is likewise fitted concentrically around the housing and which in one embodiment is provided at top and bottom with circular connecting ends.
  • the flue gas vent fitting is further provided with rapid couplings with integrated shut-off valve, or slide couplings, so that the unit can be quickly and easily uncoupled from and/or fastened to the flue gas evacuation line.
  • the concentric heat exchanger is directly coupled to a plate heat exchanger or fluid storage vessel, which components in one embodiment are integrated in the thermally insulating housing of the flue-gas vent fitting.
  • a plate heat exchanger or fluid storage vessel which components in one embodiment are integrated in the thermally insulating housing of the flue-gas vent fitting.
  • An inherently conventional plate heat exchanger which is used in systems, for example, to exchange heat between domestic water and heating water, can herewith be integrated in the fitting.
  • the flue gas vent fitting can be integrated outside an existing installation in a flue or flue.
  • the flue gas vent fitting can be fitted, if so desired, inside a housing of an installation such as a high-efficiency boiler or similar device.
  • the device can here be a retrofit or be integrated in a design of a new installation.
  • the invention further relates to a device provided with one or more characterizing measures described in the appended description and/or shown in the appended drawings.
  • Fig. 1 shows an embodiment of a heat recovery fitting 1.
  • the heat recovery fitting 1 is provided with an insulating housing 2, which is provided with a waste gas inlet 3 and an outlet 4 provided substantially opposite the inlet 3.
  • An insulating housing 2 of this type is normally a plastics housing.
  • the inlet and the outlet 4 are here situated in line opposite each other, whereby it is possible to keep the inlet-side counterpressure of the device as small as possible.
  • the insulating housing 2 is further provided with connecting passages 5 for connecting up heat-exchanging fluid to the heat exchanger 6 provided in the insulating housing 2.
  • the heat exchanger 6 has a flow area A for bringing waste gas from the inlet 3 into heat-exchanging contact and leading it off to the outlet 4. This flow aperture is concentric around a connecting line through the inlet 3 and the outlet 4.
  • the heat exchanger 6 has an inlet 7 and an outlet 8 for a heat-exchanging fluid, in this case water, in particular domestic water, and an outlet 8 for the heat-exchanging fluid.
  • the heat exchanger 6 comprises a series of the concentric heat exchanger elements 9.
  • four concentric heat exchanger elements 9 are provided.
  • These concentric heat exchanger elements 9 are in one embodiment each fitted concentrically around a previous heat exchanger element 9. It is hereby possible to further minimalize the flow resistance.
  • the heat exchanger 6 is provided in its centre with a reservoir 10 for heat exchanging medium, in this particular case water, such as domestic water, as stated earlier.
  • the heat exchanger elements 9 are fitted concentrically around this storage vessel 10.
  • the storage vessel 10 is provided with an inlet 11 and an outlet 23 for the heat exchanging medium.
  • the diameter B of the storage vessel 10 is in this embodiment at least equal to the diameter C of the inlet 3.
  • the diameters of the heat exchanging elements 9 are greater than or maximally equal to the diameter of the inlet 3. As a result, the chance of condensation water flowing back via the inlet is considerably reduced.
  • the storage vessel 10 increases the thermal capacity of the heat recovery fitting 1.
  • the housing is provided with a condensation water receiving part 12.
  • the inlet is provided with a circumferential vertical rim 13, whereby flowback of condensation water collected in the condensation water receiving part 12 back into the inlet is considerably reduced.
  • the condensation water receiving part is provided with a condensation water drain 14.
  • the heat exchange fitting 1 is provided with a flow distributor 15 for distributing oncoming air over the heat exchanger 6.
  • this flow distributor 15 is a series of, in the direction of flow, successive dish-shaped elements 16.
  • the flow distributor dishes or dish-shaped elements are provided with flow holes 17 around a connecting line between the inlet 3 and the outlet 4.
  • the dish-shaped elements are respectively provided with openings or flow holes 17 of diminishing size.
  • the flow is distributed on a volume basis.
  • a simple flow distributor is a perforated plate between the heat exchanger 6 and the inlet 3. This can have a greater flow resistance, however, than the embodiment of Figure 1 .
  • the dish-shaped elements 16 are respectively further provided with a concentric condensation water chute 18, which chutes are positioned concentrically around the inlet 3. Hence condensation water flowing down from, for example, the heat exchange elements 9 can be caught by the dish-shaped elements 16 of the flow distributor 15 and will flow towards the chutes 18. By further providing these chute elements 18 with holes 19, the water will collect in the collecting chamber 12 of the housing 2.
  • the concentric heat exchange elements 9 are in this embodiment provided with restrictions 20, whereby the volume flow through each heat exchange element 9 is mutually adapted.
  • the flow limitations are respectively smaller towards the centre, whereby the flow resistance increases and hence the flow rate decreases.
  • the heat exchange elements 9 are here connected in parallel with one another.
  • the flow restrictions are here provided in the flow distributing block 21. The flow rate in the outermost heat exchange element 9 is greater than in the innermost heat exchange element 9 as a result of the flow restriction 20.
  • each heat exchanging element can hence be adapted in relative terms.
  • the heat-absorbing capacity for each concentric heat exchange element end up standing in relation to the area of the heat exchange element.
  • a good heat exchange with all heat exchange elements 9 will hence be achievable even in the event of a lower flow rate of flue gases and/or domestic water. It is clear, after all, that the heat exchanger and flow distributing means are arranged such that, both with a low flow rate of waste gases or flue gases and with a maximal flow rate of waste gases, the heat exchanger 6 and the flow distributing elements are designed such that the waste gases flow along all the heat exchanger elements 9 and there exchange their heat with the heat exchanging fluid.
  • a collecting block 22 is provided, here once again provided with flow restrictions 20.
  • the collecting block 22 connects up to the inlet 11 of the storage vessel 10.
  • the outlet 23 of the storage vessel 10 is in fluid connection with the outlet 8 of the heat recovery fitting 1.
  • the insulating housing 2 is in this embodiment made up of two elements 2' and 2" mountable one upon the other, whereby the housing can be easily divided into two parts. In this way, the heat exchanger 6 can be easily removed from the housing for cleaning, for example. Furthermore, the inlet 3 and the outlet 4 can be provided with connecting parts or connecting means, whereby the heat exchanging fitting 1 can be easily and quickly connected into a flue.
  • the outer housing can be provided with a further enveloping housing (not represented), whereby a channel is formed, limited by and between the housing 2 and an outer housing and along which air can be fed to a boiler. The air can thereby be preheated.
  • FIGS 2 and 3 show respectively a perspective view and a longitudinal section of an alternative heat exchanger 6 for the heat recovery fitting 1.
  • a heat exchanger element is provided in spiral or helical arrangement around the connecting line through the inlet 3 and the outlet 4.
  • the heat exchanger is fitted in spiral arrangement around a core.
  • this core comprises a storage vessel 10, as described above.
  • the circuits of the heat exchanger 6 are mutually connected to the inlet 7, and the circuits are mutually connected in liquid connection to the collecting block 22, which is in liquid connection with the inlet 11 of the storage vessel 10.
  • each circuit forms a heat exchanger element 9 and these are parallel-connected.
  • FIG 4 is shown an alternative heat exchanger 6 around a storage vessel 10, as described above.
  • the heat exchange elements 9 are connected in mutually parallel arrangement by means of a flow distributing block 21 and a collecting block 22.
  • the heat exchanger comprises fluid ducts in liquid connection with the flow distributing block 21 and the collecting block 22. Running along and parallel to these fluid ducts are ducts for the waste gas.
  • the fluid ducts can run parallel to the longitudinal axis of the storage vessel 10, or slightly helically or helicoidally, as in the shown embodiment.
  • FIG. 5 an alternative embodiment of a condensation water drain part for, for example, an embodiment of the flue gas vent fitting of Figure 1 is represented.
  • the condensation water receiving part 12 is provided with a concentric chute below condensation water chutes 18, in particular below the holes 19 therein, of the flow distributor 15.
  • the concentric chute has a slope in the direction of the condensation water drain 14.
  • the concentric chute is here provided with an outflow opening in line with, in operation above, the condensation water drain 14.
  • the condensation water drain 14 can be provided with a shut-off valve 30, such as the represented screw cap with cap nut.
  • the condensation water drain can further comprise a drainage chute, which forms a channel, as a component part of the condensation water drain 14, towards the inlet 3.
  • the condensation water then runs via the drainage chute and the inlet 3 out of the heat exchanger fitting 1. If the shut-off valve 30 is removed, a discharge opening is formed outside the housing.
  • the drainage chute has further downstream a discharge opening into the inlet 3.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP10195892A 2009-12-18 2010-12-20 Appareil de chauffage par condensation et évent à gaz combustible avec échangeur de chaleur Withdrawn EP2366971A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2003980A NL2003980C2 (nl) 2009-12-18 2009-12-18 Rookgasafvoerappendage met warmtewisselaar.

Publications (1)

Publication Number Publication Date
EP2366971A1 true EP2366971A1 (fr) 2011-09-21

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EP10195892A Withdrawn EP2366971A1 (fr) 2009-12-18 2010-12-20 Appareil de chauffage par condensation et évent à gaz combustible avec échangeur de chaleur

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EP (1) EP2366971A1 (fr)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549197A3 (fr) * 2011-07-19 2014-03-26 Eroglu Isi Endustri Cihazlari Sanayii Ve Ticaret Anonim Sirketi Panneau utilisé dans les systèmes à circulation de fluides
CN112119266A (zh) * 2018-03-13 2020-12-22 里姆制造公司 热水器中的凝结物减少
CN113266852A (zh) * 2021-06-03 2021-08-17 赵浩启 一种燃气灶用换热装置及应用其的燃气灶

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110081755B (zh) * 2019-04-25 2023-12-26 四川陆亨能源科技有限公司 一种烟气余热交换器

Citations (21)

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US2663549A (en) * 1950-07-14 1953-12-22 Griscom Russell Co Spiral heat exchanger
GB1150708A (en) * 1966-11-16 1969-04-30 Hodgkinson Bennis Ltd Improvements in Water Boilers Heated by Hot Gases
US3916991A (en) 1974-04-05 1975-11-04 George S Trump Heating system
US4175518A (en) 1978-02-21 1979-11-27 Reames Cedric Ted A Jr Preheater device for hot water heaters
FR2476804A1 (fr) * 1980-02-25 1981-08-28 Sageot Jean Claude Economiseur pour chaudiere de chauffage central a circulation d'eau
US4286528A (en) * 1979-08-30 1981-09-01 Stephen Willard Exhaust filter system
NL8104403A (nl) * 1981-09-24 1983-04-18 Wavin Bv Warmtewisselaar in het bijzonder een rookgascondensor.
GB2116299A (en) 1982-01-27 1983-09-21 John Barry Jackson A water heating system
US4407237A (en) * 1981-02-18 1983-10-04 Applied Engineering Co., Inc. Economizer with soot blower
US4449571A (en) 1980-08-25 1984-05-22 Kramert Arthur R Heat recovery system
JPS59147993A (ja) 1983-02-12 1984-08-24 Yoshinori Kawamura 廃熱を利用した熱交換装置
EP0131962A2 (fr) * 1983-07-19 1985-01-23 Georg Niedermeier Echangeur de chaleur
FR2574176A1 (fr) * 1984-12-04 1986-06-06 Lahaye Claude Recuperateur de chaleur sur effluents gazeux
US4893672A (en) 1986-08-21 1990-01-16 Bader Emil E Counter-flow heat exchanger with helical tube bundle
GB2253031A (en) * 1991-01-25 1992-08-26 Vaillant Joh Gmbh & Co A water storage and heating vessel
US20050133202A1 (en) 2001-11-09 2005-06-23 Aalborg Industries A/S Heat exchanger, combination with heat exchanger and method of manufacturing the heat exchanger
WO2005106331A1 (fr) 2004-05-04 2005-11-10 Savumax Oy Chauffe-eau recuperant de la chaleur d'un flux de gaz de carneau
WO2006051266A1 (fr) 2004-11-12 2006-05-18 Zenex Technologies Limited Echangeur thermique adapte a une chaudiere a condensation et chaudiere a condensation dotee d'un tel echangeur thermique
WO2006059215A1 (fr) 2004-12-02 2006-06-08 Groppalli S.R.L. Dispositif de recuperation de la chaleur de gaz de combustion d'une chaudiere domestique
US7360507B1 (en) 2005-10-28 2008-04-22 Logsdon Mearl G Energy saving apparatus
US20080282996A1 (en) 2007-05-15 2008-11-20 Combustion & Energy Systems Ltd. Reverse-Flow Condensing Economizer And Heat Recovery Method

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2663549A (en) * 1950-07-14 1953-12-22 Griscom Russell Co Spiral heat exchanger
GB1150708A (en) * 1966-11-16 1969-04-30 Hodgkinson Bennis Ltd Improvements in Water Boilers Heated by Hot Gases
US3916991A (en) 1974-04-05 1975-11-04 George S Trump Heating system
US4175518A (en) 1978-02-21 1979-11-27 Reames Cedric Ted A Jr Preheater device for hot water heaters
US4286528A (en) * 1979-08-30 1981-09-01 Stephen Willard Exhaust filter system
FR2476804A1 (fr) * 1980-02-25 1981-08-28 Sageot Jean Claude Economiseur pour chaudiere de chauffage central a circulation d'eau
US4449571A (en) 1980-08-25 1984-05-22 Kramert Arthur R Heat recovery system
US4407237A (en) * 1981-02-18 1983-10-04 Applied Engineering Co., Inc. Economizer with soot blower
NL8104403A (nl) * 1981-09-24 1983-04-18 Wavin Bv Warmtewisselaar in het bijzonder een rookgascondensor.
GB2116299A (en) 1982-01-27 1983-09-21 John Barry Jackson A water heating system
JPS59147993A (ja) 1983-02-12 1984-08-24 Yoshinori Kawamura 廃熱を利用した熱交換装置
EP0131962A2 (fr) * 1983-07-19 1985-01-23 Georg Niedermeier Echangeur de chaleur
FR2574176A1 (fr) * 1984-12-04 1986-06-06 Lahaye Claude Recuperateur de chaleur sur effluents gazeux
US4893672A (en) 1986-08-21 1990-01-16 Bader Emil E Counter-flow heat exchanger with helical tube bundle
GB2253031A (en) * 1991-01-25 1992-08-26 Vaillant Joh Gmbh & Co A water storage and heating vessel
US20050133202A1 (en) 2001-11-09 2005-06-23 Aalborg Industries A/S Heat exchanger, combination with heat exchanger and method of manufacturing the heat exchanger
WO2005106331A1 (fr) 2004-05-04 2005-11-10 Savumax Oy Chauffe-eau recuperant de la chaleur d'un flux de gaz de carneau
WO2006051266A1 (fr) 2004-11-12 2006-05-18 Zenex Technologies Limited Echangeur thermique adapte a une chaudiere a condensation et chaudiere a condensation dotee d'un tel echangeur thermique
WO2006059215A1 (fr) 2004-12-02 2006-06-08 Groppalli S.R.L. Dispositif de recuperation de la chaleur de gaz de combustion d'une chaudiere domestique
US7360507B1 (en) 2005-10-28 2008-04-22 Logsdon Mearl G Energy saving apparatus
US20080282996A1 (en) 2007-05-15 2008-11-20 Combustion & Energy Systems Ltd. Reverse-Flow Condensing Economizer And Heat Recovery Method
WO2008138128A1 (fr) 2007-05-15 2008-11-20 Combustion & Energy Systems Ltd. Économiseur à condensation à écoulement inverse et procédé de recupération de la chaleur

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549197A3 (fr) * 2011-07-19 2014-03-26 Eroglu Isi Endustri Cihazlari Sanayii Ve Ticaret Anonim Sirketi Panneau utilisé dans les systèmes à circulation de fluides
CN112119266A (zh) * 2018-03-13 2020-12-22 里姆制造公司 热水器中的凝结物减少
CN113266852A (zh) * 2021-06-03 2021-08-17 赵浩启 一种燃气灶用换热装置及应用其的燃气灶

Also Published As

Publication number Publication date
NL2003980C2 (nl) 2011-06-21

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