EP0706013B1 - Gas heat exchanger - Google Patents
Gas heat exchanger Download PDFInfo
- Publication number
- EP0706013B1 EP0706013B1 EP95111631A EP95111631A EP0706013B1 EP 0706013 B1 EP0706013 B1 EP 0706013B1 EP 95111631 A EP95111631 A EP 95111631A EP 95111631 A EP95111631 A EP 95111631A EP 0706013 B1 EP0706013 B1 EP 0706013B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- heat exchanger
- gas heat
- space
- fluid
- 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.)
- Expired - Lifetime
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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
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators
- F24H3/08—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes
- F24H3/087—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators by tubes using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
- F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
Definitions
- the invention relates to a gas heat exchanger with a furnace space, a burner chamber, an outer chamber surrounding it and heat exchanger tubes for the combustion gases that make up the furnace space pull through and open into the burner chamber, the Space between the outer chamber and the burner chamber with a fluid can flow through.
- Such a gas heat exchanger is already, for example known from EP-A-519 303.
- the burner chamber in its ceiling is one of the number of heat exchanger tubes corresponding number of exhaust openings on which with a tapering towards the heat exchanger tubes Circumferential edge are provided.
- the one surrounding the burner chamber Outer chamber has openings aligned with the exhaust openings on, each also with one towards the heat exchanger tubes tapered peripheral wall are provided and on each attached to a heat exchanger tube essentially gas-tight is where the space between the inner wall of the Outer chamber and the outer wall of the burner chamber in the direction on the annular gap between the peripheral walls of the exhaust openings and the openings communicate with the ambient air and can be flowed through by air.
- the object of the present invention is to provide a known gas heat exchanger to train such that its efficiency is improved by simple constructive means.
- this task is based on a generic Gas heat exchanger by the characteristics of the characteristic Part of the main claim 1 solved. So it says in addition at least one guide channel for guidance to the heat exchanger tubes from the space between the outer chamber and the burner chamber escaping fluid in contact with the furnace chamber and / or the wall thereof. Here this will be in the space between the outer chamber and the burner chamber flowing fluid over the hot outer wall of the burner chamber heated and then through the guide channel that the Furnace room additionally heated, directed. This will not only the waste heat of the combustion gases arranged in the burner chamber Gas burner used, but also as a secondary heat source heated burner chamber wall, which otherwise the heat in the would radiate environment.
- the guide channel not only for heating, but also for targeted cooling of the Furnace chamber if there is a correspondingly pre-cooled fluid, only briefly in contact with the hot wall of the burner chamber has come through.
- a structurally preferred embodiment can consist in that the at least one additional guide channel the furnace chamber similar to how the heat exchanger tubes pass.
- the guide channel can also be placed around the furnace space and thus additionally heat the furnace space via its outer wall. It is also possible that, on the one hand, a guide channel guides the furnace chamber runs through, while on the other hand a flat guide channel wholly or partially led around the outer surface of the furnace chamber is.
- the one flowing through the space between the outer chamber and the combustion chamber Fluid can be similar via conventional heat convection the chimney effect - set in motion.
- the Fluid by means of a fan or a pump - i.e. in the form forced convection - to be set in motion.
- the fluid can also move through the combustion gases be transferred.
- the fluid is advantageously already set in motion before it flows around the furnace chamber within the guide channel or flows through it.
- FIG. 1 shows a burner chamber 10 with a gas burner 12, that of an outer chamber 14 leaving a gap 16 is surrounded. Extends above the outer chamber 14 there is an oven space 18.
- the oven space 18 is made of heat exchanger tubes 20 pulled through, the gas-tight in the ceiling 24 of the Open the burner chamber 10. Inside the ceiling 24 of the burner chamber 10, which is designed as a heat shield, are openings 26 provided at the points where the heat exchanger tubes 20 flow into.
- Around the outer wall 30 of the furnace chamber 18 around a guide channel 28 is guided, which with the space 16 between the outer wall 32 of the burner chamber and the outer chamber 14 is formed. In the space 16 is by means of a fan 34 blown ambient air.
- the in the space 16 ambient air blows in over the hot outer wall 32 of the burner chamber and is thereby heated.
- the corresponding heated air then flows through the guide channel 28 around the outer wall of the furnace space 30 and thus leads to a additional heating of the furnace chamber 18.
- the guide channel 28 opens into a fume cupboard 22, as does the heat exchanger tubes 20.
- FIG. 2 shows an alternative embodiment of the invention shown that, as far as the differences in the following are not in the are explained individually, otherwise as the embodiment according to Fig. 1 is constructed.
- the guide channel 28, which is also tubular here, opens also here in the intermediate space 16, as shown in FIG. 2 is.
- no opening 26 is provided.
- a gap 34 of the burner chamber 10 is left open. Here you can through the hot wall 32 or 24 heated air into the guide channel 28 flow in.
- 3 and 4 are examples of how corresponding Guide channels 28 can be arranged. These lead to these embodiments similar to the embodiment 2 in the cover 38 of the outer chamber 14 and are connected to the space 16.
- the burner chamber 10 two heat shields 24 side by side arranged in which the corresponding openings 26 except are on which the heat exchanger tubes not shown here 20 connect.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Gas Separation By Absorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Gas Burners (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
Description
Die Erfindung betrifft einen Gaswärmeaustauscher mit einem Ofenraum, einer Brennerkammer, einer diese umgebenden Außenkammer und Wärmetauscherrohren für die Verbrennungsgase, die den Ofenraum durchziehen und in die Brennerkammer einmünden, wobei der Zwischenraum zwischen der Außenkammer und der Brennerkammer mit einem Fluid durchströmbar ist.The invention relates to a gas heat exchanger with a furnace space, a burner chamber, an outer chamber surrounding it and heat exchanger tubes for the combustion gases that make up the furnace space pull through and open into the burner chamber, the Space between the outer chamber and the burner chamber with a fluid can flow through.
Ein derartiger Gaswärmeaustauscher ist beispielsweise bereits aus der EP-A-519 303 bekannt. Bei dieser bekannten Lösung weist die Brennerkammer in ihrer Decke eine der Anzahl der Wärmetauscherrohre entsprechende Anzahl von Abgasöffnungen auf, welche mit einer in Richtung auf die Wärmetauscherrohre sich verjüngenden Umfangsrand versehen sind. Die die Brennerkammer umgebende Außenkammer weist mit den Abgasöffnungen ausgerichtete Öffnungen auf, die jede ebenfalls mit einer in Richtung auf die Wärmetauscherrohre sich verjüngende Umfangswand versehen sind und auf den jeweils ein Wärmetauscherrohr im wesentlichen gasdicht befestigt ist wobei der Raum zwischen der Innenwandung der Außenkammer und der Außenwandung der Brennerkammer in Richtung auf den Ringspalt zwischen den Umfangswänden der Abgasöffnungen und der Öffnungen mit der Umgebungsluft in Verbindung steht und von Luft durchströmbar ist. Durch diese besondere Ausgestaltung der Abgasöffnungen der Brennerkammer und der Öffnungen der Außenkammer um jede Abgasöffnung herum wird jeweils eine Venturi-artige Düse gebildet, durch welche Luft aus dem Zwischenraum zwischen Außenkammer und Brennerkammer durch die Abgase angesaugt wird. Hierdurch wird es erreicht, daß insbesondere die Anschlußstelle für die Wärmetauscherrohre und die Decke des Außenraumes gekühlt wird. Bei dieser Lösung wird aber die Luft aus dem Ringspalt zwischen der Brennerkammer und Außenkammer immer zusammen mit den Verbrennungsgasen durch die Wärmetauscherrohre geleitet.Such a gas heat exchanger is already, for example known from EP-A-519 303. In this known solution points the burner chamber in its ceiling is one of the number of heat exchanger tubes corresponding number of exhaust openings on which with a tapering towards the heat exchanger tubes Circumferential edge are provided. The one surrounding the burner chamber Outer chamber has openings aligned with the exhaust openings on, each also with one towards the heat exchanger tubes tapered peripheral wall are provided and on each attached to a heat exchanger tube essentially gas-tight is where the space between the inner wall of the Outer chamber and the outer wall of the burner chamber in the direction on the annular gap between the peripheral walls of the exhaust openings and the openings communicate with the ambient air and can be flowed through by air. This special design the exhaust openings of the burner chamber and the openings of the outer chamber around each exhaust opening there is a Venturi-like one Nozzle formed, through which air from the space between Outer chamber and burner chamber sucked in by the exhaust gases becomes. This ensures that, in particular, the connection point for the heat exchanger tubes and the ceiling of the exterior is cooled. With this solution, however, the air from the annular gap always together between the burner chamber and the outer chamber with the combustion gases passed through the heat exchanger tubes.
Aufgabe der vorliegenden Erfindung ist es, einen bekannten Gaswärmeaustauscher derart weiterzubilden, daß sein Wirkungsgrad durch einfache konstruktive Mittel verbessert wird.The object of the present invention is to provide a known gas heat exchanger to train such that its efficiency is improved by simple constructive means.
Erfindungsgemäß wird diese Aufgabe ausgehend von einem gattungsgemäßen
Gaswärmeaustauscher durch die Merkmale des kennzeichnenden
Teils des Hauptanspruchs 1 gelöst. Demnach steht zusätzlich
zu den Wärmetauscherrohren zumindest ein Führungskanal zur Führung
des aus dem Zwischenraum zwischen Außenkammer und Brennerkammer
austretenden Fluids mit dem Ofenraum und/oder der Wand desselben in Kontakt. Hier
wird das im Zwischenraum zwischen Außenkammer und Brennerkammer
strömende Fluid über die heiße Außenwandung der Brennerkammer
aufgeheizt und anschließend durch den Führungskanal, der den
Ofenraum zusätzlich aufheizt, geleitet. Hierdurch wird nicht nur
die Abwärme der Verbrennungsgase der im Brennerraum angeordneten
Gasbrenner genutzt, sondern auch als sekundäre Wärmequelle die
aufgeheizte Brennerkammerwand, die ansonsten die Wärme in die
Umgebung abstrahlen würde.According to the invention, this task is based on a generic
Gas heat exchanger by the characteristics of the characteristic
Part of the
Gemäß einer bevorzugten Ausführungsform kann der Führungskanal nicht nur zum Aufheizen, sondern auch zum gezielten Abkühlen des Ofenraums dienen, wenn hier ein entsprechend vorgekühltes Fluid, das nur kuzzeitig mit der heißen Brennerkammerwand in Berührung gekommen ist, durchgeleitet wird.According to a preferred embodiment, the guide channel not only for heating, but also for targeted cooling of the Furnace chamber if there is a correspondingly pre-cooled fluid, only briefly in contact with the hot wall of the burner chamber has come through.
Eine konstruktiv bevorzugte Ausgestaltung kann darin bestehen, daß der mindestens eine zusätzliche Führungskanal den Ofenraum ähnlich wie die Wärmetauscherrohre durchzieht. Der Führungskanal kann aber auch flächig um den Ofenraum herum gelegt sein und somit den Ofenraum zusätzlich über dessen Außenwandung beheizen. Es ist auch möglich, daß einerseits ein Führungskanal den Ofenraum durchzieht, während andererseits ein flächiger Führungskanal um die Außenfläche des Ofenraums ganz oder teilweise herumgeführt ist.A structurally preferred embodiment can consist in that the at least one additional guide channel the furnace chamber similar to how the heat exchanger tubes pass. The guide channel can also be placed around the furnace space and thus additionally heat the furnace space via its outer wall. It is also possible that, on the one hand, a guide channel guides the furnace chamber runs through, while on the other hand a flat guide channel wholly or partially led around the outer surface of the furnace chamber is.
Das den Zwischenraum zwischen Außenkammer und Brennkammer durchströmende Fluid kann über die übliche Wärmekonvektion - ähnlich dem Kamineffekt - in Bewegung versetzt werden.The one flowing through the space between the outer chamber and the combustion chamber Fluid can be similar via conventional heat convection the chimney effect - set in motion.
Zusätzlich kann gemäß einer bevorzugten Ausführungsform das Fluid mittels eines Ventilators oder einer Pumpe - also in Form einer erzwungenen Konvektion - in Bewegung gesetzt werden.In addition, according to a preferred embodiment, the Fluid by means of a fan or a pump - i.e. in the form forced convection - to be set in motion.
Schließlich kann das Fluid auch über die Verbrennungsgase in Bewegung versetzt werden.Finally, the fluid can also move through the combustion gases be transferred.
Vorteilhaft wird das Fluid bereits in Bewegung versetzt, bevor es innerhalb des Führungskanals um den Ofenraum herumströmt bzw. diesen durchströmt.The fluid is advantageously already set in motion before it flows around the furnace chamber within the guide channel or flows through it.
Einzelheiten und Vorteile der Erfindung werden anhand von in den Figuren dargestellten Ausführungsbeispielen im folgenden näher erläutert. Es zeigen:
- Fig. 1:
- einen Schnitt durch einen Teil eines Gaswärmeaustauschers gemäß einer ersten Ausführungsform der Erfindung,
- Fig. 2:
- einen vergrößerter Querschnitt in einer Darstellung ähnlich gemäß derjenigen gemäß Fig. 1 mit einer zweiten Ausführungsform,
- Fig. 3:
- eine Draufsicht auf die Außenkammerdecke von der Brennerkammer aus gesehen einer dritten Ausführungsform der Erfindung und
- Fig. 4:
- eine ähnliche Darstellung gemäß Fig. 3, jedoch eine vierte Ausführungsform der Erfindung darstellend.
- Fig. 1:
- 2 shows a section through part of a gas heat exchanger according to a first embodiment of the invention,
- Fig. 2:
- 2 shows an enlarged cross section in a representation similar to that according to FIG. 1 with a second embodiment,
- Fig. 3:
- a plan view of the outer chamber ceiling seen from the burner chamber of a third embodiment of the invention and
- Fig. 4:
- a similar representation of FIG. 3, but illustrating a fourth embodiment of the invention.
In Fig. 1 ist ein Brennerraum 10 mit einem Gasbrenner 12 dargestellt,
der von einer Außenkammer 14 unter Freilassung eines Zwischenraumes
16 umgeben ist. Oberhalb der Außenkammer 14 erstreckt
sich ein Ofenraum 18. Der Ofenraum 18 ist von Wärmeaustauscherrohren
20 durchzogen, die gasdicht in die Decke 24 der
Brennerkammer 10 einmünden. Innerhalb der Decke 24 der Brennerkammer
10, die als Hitzeschutzschild ausgebildet ist, sind Öffnungen
26 an den Stellen vorgesehen, an denen die Wärmeaustauscherrohre
20 einmünden. Um die Außenwand 30 des Ofenraums 18
herum ist ein Führungskanal 28 geführt, der mit dem Zwischenraum
16 zwischen der Außenwandung 32 des Brennerraumes und der Außenkammer
14 gebildet ist. In den Zwischenraum 16 wird mittels
eines Ventilators 34 Umgebungsluft geblasen. Die in den Zwischenraum
16 eingeblasene Umgebungsluft streicht über die heiße Außenwandung
32 der Brennerkammer und wird dadurch erwärmt. Die entsprechend
erwärmte Luft strömt dann durch den Führungskanal 28
um die Außenwandung des Ofenraumes 30 und führt somit zu einer
zusätzlichen Erwärmung des Ofenraumes 18. Der Führungskanal 28
mündet wie auch die Wärmeaustauscherrohre 20 in einen Abzug 22.1 shows a
In der Fig. 2 wird eine alternative Ausführungsform der Erfindung
gezeigt, die, soweit die Unterschiede im folgenden nicht im
einzelnen erläutert sind, ansonsten wie die Ausführungsform gemäß
Fig. 1 aufgebaut ist. Der erste wesentliche Unterschied bei
dieser Ausführungsform gegenüber derjenigen nach Fig. 1 besteht
darin, daß der Führungskanal 28 parallel zu den Wärmeaustauscherrohren
20 durch den Ofenraum 18 hindurchgeführt ist. Der Führungskanal
28, der hier auch rohrförmig ausgebildet ist, mündet
auch hier in den Zwischenraum 16, wie das in Fig. 2 dargestellt
ist. Im Unterschied zu den Wärmeaustauscherrohren 20 ist an der
entsprechend gegenüberliegenden Stelle in der Abdeckung des Brennerraums
10 keine Öffnung 26 vorgesehen. Darüber hinaus ist zwischen
dem freien Ende des Führungskanals 28 und der Abdeckung
des Brennerraums 10 ein Spalt 34 freigelassen. Hier kann die
durch die heiße Wandung 32 bzw. 24 aufgeheizte Luft in den Führungskanal
28 einströmen. Ein weiterer Unterschied zu der Ausführungsform
gemäß Fig. 1 besteht hier darin, daß kein Ventilator
zur Erzeugung einer Zwangskonvektion vorhanden ist, sondern daß
in der Außenkammer 14 lediglich eine entsprechende Öffnung 36
zur Umgebung freigelassen ist, die das Einströmen von Umgebungsluft
ermöglicht. Dabei wird in diesem Ausführungsbeispiel
die aufzuheizende Umgebungsluft durch thermische Konvektion in
Bewegung versetzt.2 shows an alternative embodiment of the invention
shown that, as far as the differences in the following are not in the
are explained individually, otherwise as the embodiment according to
Fig. 1 is constructed. The first major difference in
this embodiment compared to that of FIG. 1
in that the
In den Fig. 3 und 4 ist beispielhaft erläutert, wie entsprechende
Führungskanäle 28 angeordnet werden können. Diese münden gemäß
diesen Ausführungsbeispielen ähnlich wie bei der Ausführungsform
gemäß Fig. 2 in die Abdeckung 38 der Außenkammer 14 ein und
stehen mit dem Zwischenraum 16 in Verbindung. In der Ansicht von
unten gemäß den Fig. 3 und 4 sind mit 32 die Seitenwandungen der
Brennerkammer 10 bezeichnet. Hier sind unterhalb der Abdeckung
der Brennerkammer 10 nebeneinander zwei Hitzeschutzschilde 24
angeordnet, in denen die entsprechenden Öffnungen 26 ausgenommen
sind, an denen die hier nicht näher dargestellten Wärmeaustauscherrohre
20 anschließen.3 and 4 are examples of how
Claims (7)
- Gas heat exchanger having a furnace chamber (18), a burner chamber (10), an outer chamber (14) surrounding the latter and heat-exchanger pipes (20) for the combustion gases, these pipes (20) passing through the furnace chamber (18) and opening into the burner chamber (10), and a fluid being able to flow through the interspace (16) between the outer chamber (14) and the burner chamber (10), characterized in that at least one guide duct (28) for guiding the fluid that emerges from the interspace between outer chamber (14) and burner chamber (10) is in contact with the furnace chamber (18) and/or the wall of the same.
- Gas heat exchanger according to Claim 1, characterized in that the at least one guide duct (28) serves to heat up or cool down the furnace chamber (18).
- Gas heat exchanger according to Claim 1 or 2, characterized in that the at least one guide duct (28) passes through the furnace chamber (18) and/or is placed around the latter.
- Gas heat exchanger according to one of Claims 1 - 3, characterized in that the fluid is set moving by thermal convection.
- Gas heat exchanger according to one of Claims 1 - 3, characterized in that the fluid is set moving by means of a fan (34) or a pump, that is to say by means of forced convection.
- Gas heat exchanger according to one of Claims 1 - 3, characterized in that the fluid is set moving by combustion gases.
- Gas heat exchanger according to one of Claims 1 - 6, characterized in that the fluid is set moving before it flows around the furnace chamber (18) or flows through the latter, inside the guide duct (28).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE9416204U DE9416204U1 (en) | 1994-10-07 | 1994-10-07 | Gas heat exchanger |
DE9416204U | 1994-10-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0706013A1 EP0706013A1 (en) | 1996-04-10 |
EP0706013B1 true EP0706013B1 (en) | 1998-04-22 |
Family
ID=6914636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95111631A Expired - Lifetime EP0706013B1 (en) | 1994-10-07 | 1995-07-24 | Gas heat exchanger |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0706013B1 (en) |
AT (1) | ATE165436T1 (en) |
DE (2) | DE9416204U1 (en) |
DK (1) | DK0706013T3 (en) |
ES (1) | ES2117817T3 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1019887A5 (en) * | 2011-03-22 | 2013-02-05 | Romato Bvba Bv Met Beperkte Aansprakelijkheid | HEATING DEVICE FOR AIR HEATING. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB562136A (en) * | 1942-11-18 | 1944-06-20 | Herbert Gordon Darby | Improvements in gas cooking stoves |
DE4120250C1 (en) | 1991-06-19 | 1992-12-24 | Rational Grosskuechentechnik Service Gmbh, 8910 Landsberg, De |
-
1994
- 1994-10-07 DE DE9416204U patent/DE9416204U1/en not_active Expired - Lifetime
-
1995
- 1995-07-24 AT AT95111631T patent/ATE165436T1/en not_active IP Right Cessation
- 1995-07-24 EP EP95111631A patent/EP0706013B1/en not_active Expired - Lifetime
- 1995-07-24 DK DK95111631T patent/DK0706013T3/en active
- 1995-07-24 DE DE59501976T patent/DE59501976D1/en not_active Expired - Fee Related
- 1995-07-24 ES ES95111631T patent/ES2117817T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE9416204U1 (en) | 1994-12-01 |
DE59501976D1 (en) | 1998-05-28 |
EP0706013A1 (en) | 1996-04-10 |
ES2117817T3 (en) | 1998-08-16 |
ATE165436T1 (en) | 1998-05-15 |
DK0706013T3 (en) | 1999-02-01 |
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