EP1707895A2 - Echangeur de chaleur principal pour un dispositif de chauffage - Google Patents

Echangeur de chaleur principal pour un dispositif de chauffage Download PDF

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Publication number
EP1707895A2
EP1707895A2 EP06004437A EP06004437A EP1707895A2 EP 1707895 A2 EP1707895 A2 EP 1707895A2 EP 06004437 A EP06004437 A EP 06004437A EP 06004437 A EP06004437 A EP 06004437A EP 1707895 A2 EP1707895 A2 EP 1707895A2
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
water
chamber
heating
exchanger according
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Withdrawn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
EP06004437A
Other languages
German (de)
English (en)
Other versions
EP1707895A3 (fr
Inventor
Gerhard Rambacher
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.)
Rotex Heating Systems GmbH
Original Assignee
Rotex Heating Systems GmbH
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 Rotex Heating Systems GmbH filed Critical Rotex Heating Systems GmbH
Publication of EP1707895A2 publication Critical patent/EP1707895A2/fr
Publication of EP1707895A3 publication Critical patent/EP1707895A3/fr
Withdrawn legal-status Critical Current

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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
    • F24H1/24—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers
    • F24H1/26—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water mantle surrounding the combustion chamber or chambers the water mantle forming an integral body
    • 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
    • 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
    • F24H1/50—Water heaters for central heating incorporating heaters for domestic water incorporating domestic water tanks

Definitions

  • the invention relates to a heat exchanger and in particular a primary heat exchanger for a heating device for heating heating water and in particular for the combined heating of heating and service water, which is designed as part of a fitted with a burner boiler and acted upon with combustion gases from the burner heat exchanger space and with Has hot water acted upon water space.
  • the invention further relates to a heating device for heating heating water and in particular for the combined heating of heating and service water, which comprises a heat storage liquid, in particular storage water, fillable storage tank and a projecting from above into the interior of the storage tank boiler.
  • the tubular elongated immersion tank includes there a arranged at its upper end outside the storage tank gas burner and a far down into the storage tank projecting double-walled primary heat exchanger with an acted upon the combustion gases of the burner inner gas duct and a ring surrounding the gas channel, can be acted upon with hot water Edelbergkanal.
  • the known heat exchanger and the known heater have a high efficiency and a large heat output, but cause problems when the heat exchanger must be removed in rooms with low ceiling height for maintenance or replacement of the storage container.
  • the present invention seeks to improve a heat exchanger and a heater of the type mentioned in that without substantial impairment of the heat output and efficiency allows a reduction in size and a compact design of the heat exchanger and thus the same exchange at low room heights is relieved.
  • the heat exchanger chamber annularly surrounds the combustion chamber of the burner and the combustion gases is at least partially circularly flowed through, that is along an arc or ring segment around the axis of the combustion chamber around, the latter in a preferred vertical mounting position of is heated above, so that the combustion gases move horizontally in the circumferential direction around the combustion chamber after entering the heat exchanger chamber.
  • the invention is based on the idea to allow by arranging the heat exchanger chamber around the combustion chamber around a very compact and low construction of the heat exchanger, preferably with a squat flat cylindrical shape, in which an annular gas guide is provided in the circumferential direction of preferably more than 270 ° and the Ratio of height to diameter preferably less than 1.
  • the water space of the heat exchanger preferably comprises two adjoining the end faces of the heat exchanger chamber water chambers, of which in the preferred vertical mounting position one above or below the heat exchanger space is arranged.
  • the two water chambers also surround the combustion chamber annularly, wherein they are at least partially flowed through in countercurrent to the combustion gases in the heat exchanger space from the heating water.
  • the water chambers preferably have built-in water guiding elements in the form of ribs or baffles alternately outwardly from an inner circumferential wall of the water chambers separating the water chambers from the combustion chamber and from an outer peripheral wall to be bounded by the water chambers Peripheral wall of the water chambers protrude inward, so that they guide the heating water meandering through the water chambers.
  • the heating water flows along an intermediate wall separating the respective water chamber from the heat exchanger space, through which the heat of the hot combustion gases is transferred from the heat exchanger space into the water chamber.
  • the intermediate walls are preferably provided on their sides facing the heat exchanger space with protruding, formed on the intermediate walls metallic heat exchanger elements to increase the surface flushed by the combustion gases.
  • the heat exchanger elements are advantageously formed like a pin and are expedient from the two partitions in the heat exchanger over, where they are integrally formed with their feet to the respective partition and with their heads or free ends either in pairs opposite or comb-like mesh.
  • the latter arrangement has the advantage that in the manufacture of the heat exchanger in sand casting between the heat exchanger elements sufficiently large distances can be provided, but remain after the meshing of the heat exchanger elements only narrow spaces, whereby the gas velocity increases and the heat transfer is improved.
  • the same can also apply to the heat exchanger elements in the vicinity of a heating water passage which passes through the heat exchanger space in the axial direction in order to ensure a substantially constant flow cross section along the entire arcuate path of the combustion gases through the heat exchanger space.
  • the flow rate of the combustion gases is increased from the inside to the outside by either the radial flow cross section of the heat exchanger space increased from the inside out or provides the projecting into the heat exchanger space heat transfer elements with a smaller from the inside to the flow cross section.
  • the heat exchanger chamber and the combustion chamber are preferably separated by a partition wall which surrounds the combustion chamber in an annular manner and is provided at a location with a radial gas inlet opening through which the combustion gases pass from the combustion chamber into the heat exchanger space.
  • the partition is expediently extended on one side of the gas inlet opening to an outer peripheral wall of the heat exchanger space, so that the combustion gases entering the heat exchanger space through the gas inlet opening are directed in the other direction and in a circle around the combustion chamber to an axial gas outlet opening arranged beyond the dividing wall in the top of the heat exchanger room flow from where they are led up out of the heat exchanger out to an exhaust stack.
  • the heat exchanger space and / or the lower partition between the heat exchanger chamber and the lower water chamber are preferably in the direction of the gas outlet or of a condensate outlet provided below the gas outlet opening, so as to facilitate drainage of the condensate from the heat exchanger.
  • the above described, equipped with heat exchanger elements heat exchanger space can preferably be prepared by dividing the heat exchanger in the region of the heat exchanger space in two half-shells, which are preferably opposite to each other along a central parting plane and interconnected there.
  • the two half-shells are suitably manufactured with integrated water chambers in the sand casting process, so that only the two half-shells must be assembled for mounting the heat exchanger, after inserted in the range of axial inner water and gas ducts sleeves and along the parting plane around the combustion chamber and the outer periphery of the Heat exchanger space around seals have been inserted.
  • the invention also relates to a heating boiler and a heating device with a heat exchanger according to the invention.
  • the heating device 10 shown in FIG. 1 of a heating system of a building is used for heating heating water and service water, which are needed in the building.
  • the heating device 10 comprises an upright cylindrical storage container 12 for receiving storage water 14 as a heat storage medium, a condensing boiler 18 integrated into an upper closure lid 16 of the storage container 12 with a burner 20 and a primary heat exchanger 22 for heating heating water in a heating circuit 24 of the building, below the primary heat exchanger 22 arranged downwardly open dip tube 26 made of a material with low thermal conductivity, a primary heat exchanger 22 downstream, arranged within the dip tube 26 and surrounded by storage water 14 secondary heat exchanger 28, a primary heat exchanger 22 and the secondary heat exchanger 28 in parallel, outside of the dip tube 26 disposed and surrounded by the storage water 14 charging heat exchanger 30, one arranged in the vicinity of a peripheral wall 32 of the storage container 12 in the storage water 14, of drinking or service water d Hot water heat exchanger 34, a laminating pipe 36 connected to solar panels (not shown) of the heating system, and devices 38 for discharging condensate from the primary heat exchanger 22 flowed through.
  • a condensing boiler 18 integrated into an
  • the insulated storage container 12 is filled to just below the primary heat exchanger 22 with the pressureless storage water 14 and has an electronic level control 40 in the cap 16 and a through its peripheral wall 32 into the interior emptying compensation line 42 through which the storage container 12 can be refilled if necessary, when the water level in the storage tank 12 drops below a desired level.
  • an overflow 44 is provided in the peripheral wall 32 just below the condensing boiler 18, exits through the storage water 14 from the storage container 12 when the water level rises above the level of the overflow 44.
  • the storage container 12 is further provided with a dip tube 46 for a storage sensor 48, with which the water temperature at the bottom of the storage container 12 is measured.
  • the condensing boiler 18 is installed in the cap 16 of the storage container 12 such that operated with gas or oil fuel and provided with a fan air supply burner 20 is located on the top of the lid 16 and with a downwardly facing burner mouth from the top axially into the interior of the cylindrical primary heat exchanger 22 protrudes.
  • the compact, generally cylindrical primary heat exchanger 22 is comprised of a shell 50 and a base 52 which are substantially mirror-inverted in design and sand casting made of aluminum before they are screwed together after a mechanical processing along a horizontal parting plane 54.
  • the primary heat exchanger 22 at its center surrounds a central combustion chamber 56, which is acted upon by the hot combustion gases during operation of the burner 20.
  • the combustion chamber 56 is bounded below by a lower end wall 58 of the lower part 52 and upwardly by an upper end wall 60 of the upper part 50 and is surrounded for the most part by a substantially cylindrical peripheral wall 62, via which the combustion chamber 56 facing inside survive radial heat conductivities 64.
  • the upper end wall 60 of the upper part 50 has a central burner opening 66, via which the burner 20 is flanged.
  • the combustion chamber 56 is surrounded at the upper and lower front end of the heat exchanger 22 by a flat annular upper and lower water chamber 68 and 70, while it between the two water chambers 68 and 70 of one is acted upon by the combustion gases of the burner 20 heat exchanger chamber 72 of the heat exchanger 22 is surrounded.
  • the upper and lower water chambers 68, 70 are each divided by two radial partitions 74 into two separate halves 76, 78 on opposite sides of the combustion chamber 56 and each have a plurality of rib-shaped baffles or ribs 80 alternating between the partitions 74 one of the peripheral wall 62 of the combustion chamber 56 formed inner wall of the water chamber 68, 70 radially outwardly and from a concentric outer wall 82 of the water chamber 68, 70 project radially inward, whereby the heating water must meander in the water chambers 68, 70 and thus its flow path is extended.
  • the heating water circulated by a circulating pump 84 enters through a return port 86 in the upper end wall 60 of the upper 50 into the rear half 76 of the upper water chamber 68 in FIGS. 3 and 4 and becomes one through this half 76 on the opposite side of the water chamber 68 arranged first water passage 88 which leads through the heat exchanger chamber 72 through to the lower water chamber 70.
  • the heating water flows in the opposite direction of flow through the rear half 76 of the chamber 70 to a below the return port 86 in the lower end wall 58 of the base 52 mounted water outlet 90 ( Figure 1), where it is in the secondary heat exchanger 28 in the interior the dip tube 26 enters.
  • the heating water After passing through the heat exchanger 28, the heating water enters the front half 78 of the lower water chamber 70 through a water inlet 92 located near the water outlet 90 in the lower end wall 58 of the lower part 52 and through this to an opposite, parallel to the first water passage 88 passed second water passage 94, through which it passes into the front half 78 of the upper water chamber 68.
  • the heated heating water After flowing through the front half 78 of the Upper water chamber 68, the heated heating water exits through a arranged next to the return port 86 supply port 96 in the upper end wall 60 of the heat exchanger 22 again from the latter and from there to a downstream three-way valve 98 (Fig. 1) in the heating circuit 24 passed to it Consumers in the building.
  • heat exchanger chamber 72 is surrounded by two facing annular shells of the upper part 50 and the lower part 52 which upwards or downwards are separated by an intermediate wall 100, 102 from the adjacent water chamber 68 and 70, respectively.
  • the cylindrical peripheral wall 62 of the combustion chamber 56 is interrupted in the region of the heat exchanger chamber 72 at a single point to form a radial gas inlet opening 104, through which the combustion gases are fed into the heat exchanger chamber 72.
  • the peripheral wall 62 of the combustion chamber 56 is extended at 106 in the radial direction through the heat exchanger chamber 72 outwardly to the closed outer peripheral wall 82 of the heat exchanger 22, so that a passage of the combustion gases is prevented in this direction. As best shown in FIG.
  • the heat exchanger space 72 beyond the extension 106 of the peripheral wall 82 has an upwardly extending axial gas outlet opening 108 which communicates with an exhaust passage 110 passing through the upper water chamber 68 and upper end wall 60 of the top 50 is. From the exhaust gas passage, the exhaust gas is discharged upwards out of the condensing boiler 18 and into a chimney 111 (FIG. 1).
  • the hot combustion gases from the gas inlet opening 104 substantially Circular or circular, ie over a circumferential angle of more than 270 degrees, guided around the combustion chamber 56 through the heat exchanger chamber 72, wherein they give off a large part of their heat to the heating water in the water chambers 68, 70 and as in known condensing boilers to Cool condensation.
  • the location where the gas inlet port 104 is located is located approximately below the return port 86 of the heat exchanger 22 so that the cold heating water entering the upper water chamber 68 flows countercurrent to the hot combustion gases through the rear half 76 of this water chamber 68 is heated to the countercurrent principle.
  • the two partitions 100 and 102 between the heat exchanger space 72 and the upper and lower water chambers 68 and 70, respectively, are not parallel to the horizontal parting plane 54 between the upper 50 and the lower 52 of the heat exchanger 22 but slightly inclined down to the side of the gas outlet opening 108, so that between the gas inlet opening 104 and the gas outlet opening 108, a descending gas flow through the heat exchanger chamber 72 is achieved and the resulting condensate along the inclined lower partition wall 102 to a below the gas outlet opening 108th arranged condensate drain 112 can flow.
  • the heat exchanger space 72 is equipped with a plurality of pin-shaped heat transfer elements 114, each with its root at one of the two partitions 100, 102 between the heat exchanger chamber 72 and the upper and lower water chamber 68 and 70 are formed and protrude from the top or bottom into the heat exchanger chamber 72, whereby there is the surface of the heat exchanger 22 surrounded by the combustion gases is increased.
  • the pin-shaped heat transfer elements 114 have a cylindrical cross section and are arranged so that the projecting from above or from below into the heat exchanger chamber 72 elements 114 in pairs opposite each other and their free ends have a small distance from each other ,
  • other cross-sectional shapes are possible, such as polygonal or oval cross-sectional shapes.
  • a comb-like interlocking arrangement is also possible.
  • This latter not shown in the drawing arrangement has the advantage that on the one hand, the lateral distance between adjacent elements 114 of the upper part 50 and the lower part 52 is increased, which facilitates the production of the two parts 50, 52 in the sand casting method, and that the combustion gases alternately flow against elements 114 on their colder roots and on their warmer free ends, whereby, on the one hand, the combustion gases as a whole cool to a more homogeneous temperature level and, on the other hand, the free ends of the elements 114 can not heat up too much.
  • the heat exchanger space 72 has a trapezoidal cross-section which widens outwards in the radial direction, so that the flow resistance of its outer circumference increases towards its inner periphery.
  • the same effect can also be achieved by making the cross-section of the heat transfer elements 114 and thus their flowed surface larger from outside to inside.
  • the disposed within the dip tube 26 secondary heat exchanger 28 is used as well as the outside of the dip tube 26 arranged charging heat exchanger 30 for heating the storage water 14, from the stored heat with burner off 20 via the hot water heat exchanger 34 to the hot water 120 or at low power consumption by circulation of the heating water can be fed into the heating circuit 24 when the burner 20 is switched off.
  • the means 38 for draining the condensate from the heat exchanger chamber 72 consist essentially of the condensate drain 112 in Shape of a recessed in a solid part of the intermediate wall 102 between the heat exchanger chamber 72 and the lower water chamber 70 pipe bend whose funnel-shaped enlarged upper end at the lowest point of the heat exchanger chamber 72 opens and its lower, radially outwardly facing end to the outside of the outer peripheral wall 82 of the heat exchanger 22 extends, connected to the end of the condensate drain 112 pipe section 122 (Fig.
  • the laminating tube 36 connected to the solar panels of the heating system is charged with heated heating water from the solar panels through a supply connection 128 in the cover 16 of the storage container 12. After passing through the laminating tube 36, the cooled heating water flows back into the solar panels through a return port 130 arranged in the lower part of the peripheral wall 32 of the storage tank 12.
  • the regulation of the solar circuit is carried out with the aid of a heat sensor 132.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)
EP06004437A 2005-03-07 2006-03-04 Echangeur de chaleur principal pour un dispositif de chauffage Withdrawn EP1707895A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005011302 2005-03-07

Publications (2)

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EP1707895A2 true EP1707895A2 (fr) 2006-10-04
EP1707895A3 EP1707895A3 (fr) 2009-06-03

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Family Applications (1)

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EP06004437A Withdrawn EP1707895A3 (fr) 2005-03-07 2006-03-04 Echangeur de chaleur principal pour un dispositif de chauffage

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100449220C (zh) * 2007-03-06 2009-01-07 成都前锋热交换器有限责任公司 冷凝式热交换器
DE102009046707A1 (de) 2009-11-13 2011-05-19 Rotex Heating Systems Gmbh Heizsystem

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110527A1 (de) 2001-03-05 2002-09-12 Rotex Gmbh Metall Und Kunststo Heizeinrichtung zur kombinierten Heiz- und Brauchwassererwärmung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957533A (fr) * 1950-02-23
GB191124051A (en) * 1911-10-30 1912-03-28 Felix Gremmels An Improvement in Sectional Boilers.
GB962619A (en) * 1962-05-12 1964-07-01 Hovalwerk Ag Ospelt Improvements in or relating to hot-water boilers
FR2553503B1 (fr) * 1983-10-17 1988-08-05 Dietrich Sa Element de corps de chauffe a picots
DE4025233A1 (de) * 1990-08-09 1992-02-13 Hoechst Ceram Tec Ag Keramischer brennwertheizkessel mit wassergekuehlter brennkammer
DE4415364C2 (de) * 1994-05-02 1996-04-25 Viessmann Werke Kg Gasheizkessel
DE10013608C2 (de) * 2000-03-18 2002-01-31 Bosch Gmbh Robert Wärmetauscher für ein Gasbrennwertgerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10110527A1 (de) 2001-03-05 2002-09-12 Rotex Gmbh Metall Und Kunststo Heizeinrichtung zur kombinierten Heiz- und Brauchwassererwärmung

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100449220C (zh) * 2007-03-06 2009-01-07 成都前锋热交换器有限责任公司 冷凝式热交换器
DE102009046707A1 (de) 2009-11-13 2011-05-19 Rotex Heating Systems Gmbh Heizsystem
EP2325567A2 (fr) 2009-11-13 2011-05-25 ROTEX Heating Systems GmbH Système de chauffage

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Publication number Publication date
EP1707895A3 (fr) 2009-06-03

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