WO2000050821A1 - Chaudiere mixe - Google Patents

Chaudiere mixe Download PDF

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Publication number
WO2000050821A1
WO2000050821A1 PCT/NL2000/000115 NL0000115W WO0050821A1 WO 2000050821 A1 WO2000050821 A1 WO 2000050821A1 NL 0000115 W NL0000115 W NL 0000115W WO 0050821 A1 WO0050821 A1 WO 0050821A1
Authority
WO
WIPO (PCT)
Prior art keywords
boiler
liquid
flue gas
flue
housing
Prior art date
Application number
PCT/NL2000/000115
Other languages
English (en)
Inventor
Theodorus Johannes Gerardus Maria VAN DER HAMSVOORT
Peter Joannes Verstappen
Walterus Maria Johannes Hoogveldt
Cornelis Johannes Adriana De Jongh
Original Assignee
A.O. Smith Water Products Company 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 A.O. Smith Water Products Company B.V. filed Critical A.O. Smith Water Products Company B.V.
Priority to AU28326/00A priority Critical patent/AU2832600A/en
Publication of WO2000050821A1 publication Critical patent/WO2000050821A1/fr

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
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
    • F24H1/206—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes with submerged combustion chamber

Definitions

  • MIXED BOILER Device tfefl-Hlrg a irst liquid present in a boiler and heating a second liquid by means of said heated first liquid in a heat exchanger.
  • the present invention relates to a device for heating a first liquid present in a boiler, wherein a flue gas housing with a burner disposed therein is provided in said boiler, which housing is connected to a flue duct which extends from said housing through the boiler and which is connected via a pipe to a flue gas discharge channel outside the boiler, and wherein said first heated liquid is in contact with a heat exchanger for heating a second liquid.
  • a device of this kind is known from FR-A-2 714 719, which device consists of a boiler with a burner disposed therein, which delivers flue gases to a flue gas housing.
  • a flue duct is spirally wound round the flue gas housing.
  • the heat emitted by the flue gases heats a first liquid.
  • Said first liquid delivers parts of the heat to a second liquid which is being supplied, possibly via a coil, to the upper side of the boiler and which is discharged in a reasonably heated condition. It has become apparent that the efficiency of such a device can be enhanced by making improvements in such a device.
  • a device of the above kind is furthermore known from Dutch patent application No.9101501 in the name of the present applicant.
  • the discharge pipe of the boiler known therefrom which is connected to the housing defining a combustion chamber for the purpose of discharging combustion gases, extends from said combustion chamber through the boiler to the underside of the boiler.
  • Said discharge pipe is connected outside the boiler to an upwardly extending flue via a pipe section which includes an angle of less than 90 ' with the horizontal.
  • a significant drawback of this boiler is its relatively high energy consumption.
  • the temperature of the liquid to be heated cannot be controlled with great accuracy, so that the capacity of the boiler constitutes a limitation in case of a varying demand, for example for hot water.
  • a device which comprises a boiler which has a high energy efficiency. Another object is to obtain an improved (simple) device with a high heating efficiency and a high yearly efficiency.
  • a further object of the present invention is to provide a device which comprises a boiler in which a heating facility for hot water, so-called sanitary and household water, as well as a facility for so-called CH water is incorporated.
  • the present invention as referred to in the introduction is according to the invention characterized in that the flue gas housing (5) extends over the burner (6), that the flue duct (7) extends spirally through at least part of the boiler (1), and that the heat exchanger (17) is disposed outside the boiler (1) and separately therefrom.
  • the first liquid sanitary water
  • the flue duct preferably consists of a pipe which is smooth on the outside so as to prevent undesirable elements, such as lime, from adhering thereto. Such elements have an adverse influence on the heat-transmitting capacity of the flue duct.
  • the energy content of the first liquid thus heated in the boiler is used advantageously for heating a medium (the second liquid), preferably water, which is used as so-called CH water.
  • the combustion gases are used for heating the first liquid that is present in the boiler, which 1 iquid in turn functions as a heat-transmitting medium for the second liquid.
  • the heat exchanger which functions to heat the second liquid
  • the selection of the position of the supply pipe for the first liquid is not particularly critical, but it is preferable to select the position so that the heat exchange in the heat exchanger takes place in counterflow.
  • the use of a plate heat exchanger outside the boiler is in particular advantageous because repairs can easily be carried out in a construction of this kind.
  • Another advantage of the use of the plate heat exchanger is the fact that it makes it possible to transfer a capacity equal to that which is delivered by the burner. Furthermore the heat losses are minimized when a plate heat exchanger is used.
  • the flue gas housing is disposed at a point located between three quarters of the height of the elongated, vertically disposed boiler and the upper end thereof, wherein the flue duct that springs from the flue gas housing extends downwards through the boiler and is connected to the flue gas discharge channel at a point located between the lower end of the boiler and one quarter of the height thereof. Since the flue duct extends downwards through the boiler it is possible to cool down the flue gases produced on combustion to approximately the temperature of the inflowing cold first water, so that such a construction leads to an optimum utilization of the energy contained in the combustion gases.
  • the flue gas housing extends upwards through the boiler from the bottom side thereof, wherein the flue duct of the flue gas housing which is present near the upper end of the boiler extends in the direction of the lower end thereof and is connected to the flue gas discharge channel at the bottom side of the boiler.
  • the flue duct in which the combustion gases are present, extends along a large part of the boiler, it is thus possible to realise an enhanced utilization and control of the entire heat content of the boiler.
  • the capacity of the burner disposed in the flue gas housing to be adjusted thereto.
  • the first liquid to be heated circulate over the plate heat exchanger disposed outside the boiler.
  • the flue gases condensate in the flue duct which is connected to the housing.
  • Figure 1 shows a boiler whose principle is known from FR-A-2714719, in which boiler the heat exchanger for heating the second liquid is disposed in the upper part of the boiler;
  • FIG. 2 is a representation of an embodiment of the boiler according to the invention, in which boiler the heat exchanger for heating the second liquid is in the form of a plate heat exchanger, which is disposed outside the boiler;
  • FIG. 3 is a representation of a special embodiment of a boiler according to the invention, wherein the flue gas housing extends upwards through the boiler from the bottom side thereof;
  • Figure 4 shows a device according to Figure 3, wherein only one flue duct springs from the upper side of the flue gas housing, however.
  • FIG. 1 shows a device of the type which is known from FR-A-2 714 719.
  • the device according to Figure 1 is shown in a form which is comparable to that of Figures 2-4. Accordingly, like numerals relate to comparable parts of the device.
  • Boiler 1 is mounted at a suitable location, using a mounting element 2. The necessary pumps, control systems and the like have been left out for easy reference.
  • Present in boiler 1 is an amount of water (first liquid), which is preferably used for sanitary purposes. The supply of said sanitary water takes place via pipe 3 at the bottom side of the boiler 1, and the water exits the boiler 1 at the upper side via pipe 4.
  • the first liquid present in boiler 1 is heated through the use of a flue gas housing 5, in which a burner 6 is disposed.
  • the combustion gases produced on combustion exit housing 5 via a flue duct 7, which extends downwards in boiler 1.
  • the flue duct extends up to connecting point 8 of boiler 1, and it is connected to a flue gas discharge channel (not shown) via pipe 12.
  • a spiral-shaped heat exchanger 9 which heat exchanger 9 functions to heat the second liquid, preferably heating water or CH water.
  • the supply of the second liquid to the heat exchanger 9 takes place via pipe 10.
  • the discharge of the CH water thus heated takes place via pipe 11. It is also possible, however, to reverse the direction of flow in heat exchanger 9.
  • the spiral heat exchanger 9 is disposed in the upper end of the elongated, vertically disposed boiler 1.
  • the boiler 1 shown in Figure 2 comprises a flue gas housing 5, in which a burner 6 disposed in housing 5 is provided. Housing 5 is connected to a flue duct 7 which extends downwards from housing 5 through boiler 1 and which is connected outside the boiler 1, via connecting point 8, to a pipe 12 which is connected to a flue gas discharge channel (not shown).
  • Present in boiler 1 is an amount of first liquid, in particular sanitary water. The supply of sanitary water to boiler 1 takes place via pipe 3, and the water exits boiler 1 at the upper side thereof via pipe 4.
  • boiler 1 is provided with a pipe 13 on the upper side, via which the already heated first water is supplied to a plate-shaped heat exchanger 17 disposed outside boiler 1. It is also possible, however, to connect pipe 4 to pipe 13, so that it is not necessary to provide a draining point on boiler 1.
  • the discharge of sanitary water from heat exchanger 17 takes place via pipe 14, which pipe 14 is also connected to boiler 1.
  • circulation of sanitary water takes place via pipe 13, heat exchanger 17 and pipe 14.
  • the heat exchanger 17 also comprises an inlet 15 for heating a medium (the second liquid), in particular so-called CH water. Inside the heat exchanger 17, heat contained in the first liquid supplied via pipe 13 is transferred to the CH water that is supplied via inlet 15. The heated CH water is discharged via pipe 16 while being heated in heat exchanger 17 in accordance with the counterflow principle. It is preferable to use a plate heat exchanger 17 in view of the fact that its heat transfer capacity is advantageous for the device and the use according to the invention.
  • FIG 3 schematically shows another preferred embodiment of boiler 1.
  • the device according to Figure 3 corresponds to the device which is shown in Figure 2, in particular as regards the use of the plate-shaped heat exchanger 17 which is disposed outside boiler 1.
  • Present in boiler 1 is the first liquid, in particular sanitary water, which is supplied to boiler 1 at the bottom side thereof via pipe 3 and which subsequently exits the boiler 1 at the upper side thereof via pipe 4.
  • the heating of the first liquid in boiler 1 takes place through the use of a new flue gas housing 5.
  • Said housing 5 extends upwards through the boiler from the bottom side thereof, wherein a flue duct 7 connected to housing 5 near the upper end of boiler 1 extends in downward direction and is connected to a pipe 12 at the bottom side of boiler 1, via connecting point 8, which pipe 12 is connected to a flue gas discharge channel (not shown).
  • a pipe 13 Disposed in the upper part of boiler 1 is a pipe 13, which supplies the heated first liquid that is present in boiler 1 to the heat exchanger 17. Under circumstances yet to be defined it is possible to connect pipe 4 to pipe 13, so that the use of a draining point on boiler 1 is not necessary.
  • the discharge of the heated first liquid from heat exchanger 17 takes place via discharge pipe 14, which pipe 14 is connected to boiler 1.
  • the heat exchanger 17 also comprises a supply pipe 15 and a discharge pipe 16 for the second liquid to be heated, preferably water which is used for central heating purposes.
  • the special construction of the flue duct 7 enables an adequate heat transfer of the heat contained in the combustion gases to the first liquid to be heated, which liquid is subsequently used for heating another medium, namely the second liquid.
  • the construction of flue duct 17 according to Figure 3 is special in that the duct springs from several places on the upper side of flue gas housing 5.
  • Figure 4 shows an embodiment of the device according to the invention which can be considered to be a variant of the device which is shown in Figure 3.
  • the main difference between the embodiment which is shown in Figure 4 and that which is shown in Figure 3 is that the flue duct 7 of Figure 4 springs from only one place at the upper side of the flue gas housing 5, and that the flue duct 7 of Figure 4 has a larger diameter than that of Figure 3.
  • the embodiment according to Figure 4 is of simpler construction than that of Figure 3.
  • the energy efficiency of the device according to the invention is higher than that of the devices which are known from the prior art. This is due in particular to a combination of factors such as the fact that the first liquid (sanitary water or drinking water) is heated directly by means of the flue gases, and that heat storage takes place in the first liquid.
  • the burner 6 is of a type which enables a large modulation range, viz. between 8- 40 kWatt or, put differently, a range of 1 to 5.
  • a high heating efficiency viz. higher than 104% in comparison with the bottom value, is possible as well as a high yearly efficiency, viz. higher than 60%.
  • the ratio between the maximum burner capacity and the boiler capacity is relatively high, which means that the ratio is higher than 0.20 kW/1.
  • control can take place on the basis of the heat capacity of the boiler, which means that the control not only takes place on the basis of the temperatures prevailing in boiler 1, but that said temperatures are related to imaginary volume parts of boiler 1, so that it is a matter of heat content or heat capacity.
  • the heat capacity thus determined is compared with the heat capacity that is required at a particular point in time, and on the basis of this information an optimum control of the device according to the invention is set.

Abstract

L'invention concerne un dispositif de chauffage d'un premier liquide présent dans une chaudière, dans lequel un logement de gaz de combustion renfermant un brûleur est ménagé dans ladite chaudière, lequel logement est relié à un conduit de combustion s'étendant à partir dudit logement à travers la chaudière et relié par l'intermédiaire d'un conduit à un canal de décharge des gaz de combustion à l'extérieur de la chaudière, et dans lequel ledit premier liquide chauffé se trouve en contact avec un échangeur thermique destiné à chauffer un second liquide. Le logement (5) des gaz de combustion s'étend sur le brûleur (6) et le conduit de combustion (7) s'étend en spirale à travers au moins une partie de la chaudière (1). L'échangeur thermique (17) est disposé à l'extérieur de la chaudière (1) et il en est séparé.
PCT/NL2000/000115 1999-02-26 2000-02-24 Chaudiere mixe WO2000050821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU28326/00A AU2832600A (en) 1999-02-26 2000-02-24 Mixed boiler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1011395A NL1011395C2 (nl) 1999-02-26 1999-02-26 Ketel.
NL1011395 1999-02-26

Publications (1)

Publication Number Publication Date
WO2000050821A1 true WO2000050821A1 (fr) 2000-08-31

Family

ID=19768724

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL2000/000115 WO2000050821A1 (fr) 1999-02-26 2000-02-24 Chaudiere mixe

Country Status (3)

Country Link
AU (1) AU2832600A (fr)
NL (1) NL1011395C2 (fr)
WO (1) WO2000050821A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681723B1 (en) 2003-02-12 2004-01-27 Marvin Amendt Hot water heater
ITVR20090062A1 (it) * 2009-05-07 2010-11-08 Renato Montini Caldaia compatta
DE102009040842A1 (de) * 2009-09-09 2011-03-10 Kellermann Stephan, Dipl.-Ing. Hocheffizientes, solarunterstütztes Brennwert-Speicherheizgerät für flüssige oder gasförmige Brennstoffe zur Erzeugung von Trinkwarmwasser und Heizwärme zur Raumheizung
WO2011034999A1 (fr) * 2009-09-16 2011-03-24 Heat Solutions, Inc. Dispositif de chauffage de fluide
US9121602B2 (en) 2010-12-06 2015-09-01 Russel Duane Van Wyk Steam generator
US9945553B2 (en) 2010-12-06 2018-04-17 Russel Duane Van Wyk Aqueous working fluid steam generation system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9101501A (nl) * 1991-09-06 1993-04-01 A O Smith Water Products Compa Ketel.
DE9315307U1 (de) * 1993-09-01 1994-04-14 Ewfe Heizsysteme Gmbh Behälter zur Erzeugung und Speicherung für Brauchwasser und Heizung
FR2714719A1 (fr) 1994-01-05 1995-07-07 Ctd Technologie Dispositif pour le chauffage simultané, à l'aide d'une même source de chaleur, de l'eau d'un circuit fermé de chauffage et de l'eau d'un circuit d'eau chaude sanitaire.
EP0699878A1 (fr) * 1994-09-01 1996-03-06 EWFE HEIZSYSTEME GmbH Chauffe-eau à haute rendement pour chauffer et accumuler de l'eau sanitaire et de l'eau de chauffage
EP0759528A1 (fr) * 1995-08-22 1997-02-26 MONTFORT BETEILIGUNGSGESELLSCHAFT m.b.H. Chaudiére

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9101501A (nl) * 1991-09-06 1993-04-01 A O Smith Water Products Compa Ketel.
DE9315307U1 (de) * 1993-09-01 1994-04-14 Ewfe Heizsysteme Gmbh Behälter zur Erzeugung und Speicherung für Brauchwasser und Heizung
FR2714719A1 (fr) 1994-01-05 1995-07-07 Ctd Technologie Dispositif pour le chauffage simultané, à l'aide d'une même source de chaleur, de l'eau d'un circuit fermé de chauffage et de l'eau d'un circuit d'eau chaude sanitaire.
EP0699878A1 (fr) * 1994-09-01 1996-03-06 EWFE HEIZSYSTEME GmbH Chauffe-eau à haute rendement pour chauffer et accumuler de l'eau sanitaire et de l'eau de chauffage
EP0759528A1 (fr) * 1995-08-22 1997-02-26 MONTFORT BETEILIGUNGSGESELLSCHAFT m.b.H. Chaudiére

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681723B1 (en) 2003-02-12 2004-01-27 Marvin Amendt Hot water heater
ITVR20090062A1 (it) * 2009-05-07 2010-11-08 Renato Montini Caldaia compatta
DE102009040842A1 (de) * 2009-09-09 2011-03-10 Kellermann Stephan, Dipl.-Ing. Hocheffizientes, solarunterstütztes Brennwert-Speicherheizgerät für flüssige oder gasförmige Brennstoffe zur Erzeugung von Trinkwarmwasser und Heizwärme zur Raumheizung
WO2011034999A1 (fr) * 2009-09-16 2011-03-24 Heat Solutions, Inc. Dispositif de chauffage de fluide
US10012412B2 (en) 2009-09-16 2018-07-03 Heat Solutions, Inc. Fluid heater
US9121602B2 (en) 2010-12-06 2015-09-01 Russel Duane Van Wyk Steam generator
US9945553B2 (en) 2010-12-06 2018-04-17 Russel Duane Van Wyk Aqueous working fluid steam generation system

Also Published As

Publication number Publication date
AU2832600A (en) 2000-09-14
NL1011395C2 (nl) 2000-08-29

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