EP0083379A1 - Heat exchanger - Google Patents

Heat exchanger Download PDF

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Publication number
EP0083379A1
EP0083379A1 EP81110863A EP81110863A EP0083379A1 EP 0083379 A1 EP0083379 A1 EP 0083379A1 EP 81110863 A EP81110863 A EP 81110863A EP 81110863 A EP81110863 A EP 81110863A EP 0083379 A1 EP0083379 A1 EP 0083379A1
Authority
EP
European Patent Office
Prior art keywords
profile ribs
bandage
stovepipe
heat
narrow sides
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Withdrawn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
EP81110863A
Other languages
German (de)
French (fr)
Inventor
Emil Kress
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to EP81110863A priority Critical patent/EP0083379A1/en
Publication of EP0083379A1 publication Critical patent/EP0083379A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28D21/0008—Air heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24B—DOMESTIC STOVES OR RANGES FOR SOLID FUELS; IMPLEMENTS FOR USE IN CONNECTION WITH STOVES OR RANGES
    • F24B7/00—Stoves, ranges or flue-gas ducts, with additional provisions for convection heating 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
    • F28F1/20—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means being attachable to the element

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • the invention has for its object to further develop the known heat exchangers such that a jacket can be easily attached to the heat exchanger without further fastening elements, which allows the thermal energy lost through a stovepipe to be used.
  • the object is achieved according to the characterizing part of patent claim 1.
  • An essential advantage of the invention is that the device can be safely connected to a stovepipe in a few simple steps without tools and without any additional devices and can be released again. The device therefore allows the thermal energy of a furnace to be better utilized during the heating season. Outside the heating season, it can be easily removed from the stovepipe and placed in a suitable room.
  • Another advantage is that the geometry and the flow conditions in the exhaust system are not changed and that the length of the device is arbitrary. The surface of a unit length of the stovepipe with the device according to the invention is 20 times as large as without the device, whereby a much better use of the heating energy is achieved.
  • the combustion gases rising in a stovepipe 1 heat it, but reach the chimney in a relatively hot state and escape unused into the atmosphere.
  • the hot surface of the stovepipe radiates heat to the surrounding air.
  • the device according to the invention is now placed around the stovepipe 1 and the bandage 2 on which the profile ribs 3 e.g. are fastened with rivets 4, tensioned by a quick-action fastener 5, so the free narrow sides of the profile ribs 3 lie on the outer wall of the stovepipe 1, as a result of which the entire device is held in a force-fitting manner even on vertical pipes.
  • a quick-action fastener 5 tensioned by a quick-action fastener 5
  • the profile ribs 3 do not necessarily need the embodiment shown in the drawing To have a U-shape and to lie on the bandage 2 with its horizontal connecting web. Rather, they can also be arranged upside down so that the horizontal or circular connecting web rests on the stovepipe. This leads to an improvement in heat transfer. Finally, it is also possible to give the profile ribs an L or Z-shaped design. Of these possible embodiments, the last-mentioned has the advantage that on the one hand it can be most easily attached to the bandage by means of rivets and on the other hand it nevertheless forms a wide contact surface for the stovepipe.

Abstract

The invention relates to a device for indirect exchange of heat between media flowing through and surrounding hollow bodies. In order to develop such heat exchangers so as to produce a casing, which can be mounted on the heat exchanger easily and without further fastening elements and permits the thermal energy otherwise lost through a furnace pipe to be rendered useful, string-shaped profile ribs (2) consisting of thermally conductive material are arranged radially and detachably around the furnace pipe (1). The external narrow sides of these profile ribs are fastened at a distance from one another on at least one binding band (2). The inner free narrow sides of the profile ribs (3) touch the outer wall of the furnace pipe (1) and are mounted there in a force-closed fashion. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung nach dem Gattungsbegriff des Patentanspruchs 1.The invention relates to a device according to the preamble of claim 1.

Es sind Vorrichtungen bekannt, die zur Erhöhung des Wirkungsgrades von Wärmeaustauschern durch Vergrößerung von deren Oberfläche ortsfest auf dieser angeordnet sind. Es handelt sich dabei um Heizungs- oder Kühlrohre, nicht jedoch um Ofenrohre. Die bekannten Anordnungen haben zudem den Nachteil, daß die zur Vergrößerung der Oberfläche der Rohrleitungen dienenden Profilrippen nicht ohne Beschädigung oder Zerstörung von der Oberfläche der Wärmeaustauscher wieder entfernbar sind.Devices are known which are arranged to increase the efficiency of heat exchangers by enlarging their surface in a stationary manner thereon. These are heating or cooling pipes, but not stove pipes. The known arrangements also have the disadvantage that the profile ribs serving to enlarge the surface of the pipelines cannot be removed again from the surface of the heat exchanger without damage or destruction.

Der Erfindung liegt die Aufgabe zugrunde, die bekannten Wärmetauscher derart weiterzuentwickeln, daß eine leicht und ohne weitere Befestigungselemente am Wärmeaustauscher anzubringende Ummantelung entsteht, die es gestattet, die durch ein Ofenrohr verlorengehende Wärmeenergie nutzbar zu machen. Die Lösung der gestellten Aufgabe erfolgt gemäß dem Kennzeichen des Patentanspruchs 1. Ein wesentlicher Vorteil der Erfindung ist es, daß die Vorrichtung mit wenigen Handgriffen ohne Werkzeug und ohne irgendwelche zusätzliche Einrichtungen sicher mit einem Ofenrohr verbunden und von ihm wieder gelöst werden kann. Deshalb gestattet es die Vorrichtung, während der Heizsaison die Wärmeenergie eines Ofens besser auszunutzen. Außerhalb der Heizsaison kann sie leicht vom Ofenrohr entfernt und in einem geeigneten Raum abgestellt werden. Ein weiterer Vorteil liegt darin, daß die Geometrie und die Strömungsverhältnisse im Abgassystem nicht verändert werden und daß die Länge der Vorrichtung beliebig ist. Die Oberfläche einer Längeneinheit des Ofenrohres mit der erfindungsgemäßen Vorrichtung ist 20 x so groß wie ohne die Vorrichtung, wodurch eine wesentlich bessere Nutzung der Heizenergie erreicht wird.The invention has for its object to further develop the known heat exchangers such that a jacket can be easily attached to the heat exchanger without further fastening elements, which allows the thermal energy lost through a stovepipe to be used. The object is achieved according to the characterizing part of patent claim 1. An essential advantage of the invention is that the device can be safely connected to a stovepipe in a few simple steps without tools and without any additional devices and can be released again. The device therefore allows the thermal energy of a furnace to be better utilized during the heating season. Outside the heating season, it can be easily removed from the stovepipe and placed in a suitable room. Another advantage is that the geometry and the flow conditions in the exhaust system are not changed and that the length of the device is arbitrary. The surface of a unit length of the stovepipe with the device according to the invention is 20 times as large as without the device, whereby a much better use of the heating energy is achieved.

Die Erfindung ist in der nachstehenden Beschreibung anhand der Zeichnungen in einer Ausführungsform beispielhaft erläutert.The invention is explained by way of example in the following description with reference to the drawings in one embodiment.

Es zeigen:

  • Fig. 1 die Vorderansicht der Vorrichtung in geschlossenem Zustand;
  • Fig. 2 die Draufsicht der Vorrichtung in geschlossenem Zustand und
  • Fig. 3 einen Ausschnitt der Draufsicht.
Show it:
  • Figure 1 is a front view of the device in the closed state.
  • Fig. 2 is a top view of the device in the closed state and
  • Fig. 3 shows a detail of the top view.

Die in einem Ofenrohr 1 aufsteigenden Verbrennungsgase erwärmen dieses, erreichen aber den Kamin in noch relativ heißem Zustand und entweichen ungenutzt in die Atmosphäre. Die heiße Oberfläche des Ofenrohres strahlt die Wärme an die umgebende Luft ab.The combustion gases rising in a stovepipe 1 heat it, but reach the chimney in a relatively hot state and escape unused into the atmosphere. The hot surface of the stovepipe radiates heat to the surrounding air.

Wird nun die erfindungsgemäße Vorrichtung um das Ofenrohr 1 gelegt und die Bandage 2, an der die Profilrippen 3 z.B. mit Nieten 4 befestigt sind, durch einen Schnellspann-Verschluß 5 gespannt, so legen sich die freien Schmalseiten der Profilrippen 3 an die Außenwand des Ofenrohrs 1, wodurch die ganze Vorrichtung auch an senkrechten Rohren kraftschlüssig gehalten wird. Durch die Berührung der Außenwand des Ofenrohrs 1 und der freien Schmalseiten der wärmeleitfähigen Profilrippen 3 erwärmen sich diese und strahlen ihrerseits Wärme an die umgebende Luft ab, wodurch letztlich die Verbrennungsgase im Ofenrohr 1 stärker abgekühlt werden, mehr Wärme im Bereich der Vorrichtung verbleibt und weniger Wärme in die Atmosphäre gelangt.If the device according to the invention is now placed around the stovepipe 1 and the bandage 2 on which the profile ribs 3 e.g. are fastened with rivets 4, tensioned by a quick-action fastener 5, so the free narrow sides of the profile ribs 3 lie on the outer wall of the stovepipe 1, as a result of which the entire device is held in a force-fitting manner even on vertical pipes. By touching the outer wall of the stovepipe 1 and the free narrow sides of the thermally conductive profile ribs 3, they heat up and radiate heat to the surrounding air, which ultimately cools the combustion gases in the stovepipe 1 more, more heat remains in the area of the device and less heat got into the atmosphere.

Der Wirkungsgrad des erfindungsgemäßen Wärmetauschers ist umso höher, je größer die Anzahl der Profilrippen ist, die sicheren Kontakt zur Oberfläche des Ofenrohres haben. Bei der Vielzahl der Rippen und der nur angenäherten Kreisform des Querschnitts von Ofenrohren ist es also wichtig, die einzelnen Rippen in radialer Richtung möglichst flexibel zu gestalten. Das kann geschehen, indem

  • 1. die Rippen in sich federn und sich verformen können, wenn die innere Schmalseite schon am Rohr anliegt, die Spannung aber dennoch erhöht wird, weil benachbarte Rippen noch nicht anliegen;
  • 2. zwischen den an sich steifen Rippen und der Bandage ein federndes Element liegt oder
  • 3. das Material der Bandage ein sehr flexibles Metallgeflecht ist, das die Unregelmäßigkeiten der Ofenrohrform und der Längen der Rippen auszugleichen vermag.
The efficiency of the heat exchanger according to the invention is higher, the greater the number of profile ribs that have reliable contact with the surface of the stovepipe. Given the large number of fins and the approximate circular shape of the cross-section of stovepipes, it is important to make the individual fins as flexible as possible in the radial direction. This can be done by
  • 1. the ribs spring into themselves and can deform when the inner narrow side already lies against the pipe, but the tension is nevertheless increased because adjacent ribs are not yet in contact;
  • 2. between the rigid ribs and the bandage is a resilient element or
  • 3. The material of the bandage is a very flexible metal mesh, which is able to compensate for the irregularities in the shape of the stovepipe and the lengths of the ribs.

Die Profilrippen 3 brauchen nicht notwendig die aus dem zeichnerisch dargestellten Ausführungsbeispiel ersichtliche U-Form zu haben und mit ihrem waagrechten Verbindungssteg an der Bandage 2 anzuliegen. Sie können vielmehr auch umgekehrt angeordnet sein, sodaß der waagrechte bzw. kreisförmig gestaltete Verbindungssteg am Ofenrohr anliegt. Das führt zu einer Verbesserung der Wärmeübertragung. Schließlich ist es aber auch möglich, den Profilrippen eine L- oder Z-förmige Gestaltung zu geben. Von diesen möglichen Ausführungsformen hat die zuletzt genannte den Vorzug, daß sie einerseits am einfachsten mittels Nieten an der Bandage befestigt werden kann und andererseits gleichwohl eine breite Anlagefläche für das Ofenrohr bildet.The profile ribs 3 do not necessarily need the embodiment shown in the drawing To have a U-shape and to lie on the bandage 2 with its horizontal connecting web. Rather, they can also be arranged upside down so that the horizontal or circular connecting web rests on the stovepipe. This leads to an improvement in heat transfer. Finally, it is also possible to give the profile ribs an L or Z-shaped design. Of these possible embodiments, the last-mentioned has the advantage that on the one hand it can be most easily attached to the bandage by means of rivets and on the other hand it nevertheless forms a wide contact surface for the stovepipe.

Claims (5)

1. Vorrichtung zum mittelbaren Austausch von Wärme zwischen Hohlkörper durchströmenden und diese umgebenden Medien, dadurch gekennzeichnet,
daß um ein Ofenrohr (1) aus wärmeleitfähigem Material bestehende strangförmige Profilrippen (3) strahlenförmig und lösbar angeordnet sind, deren äußere Schmalseiten an wenigstens einer Bandage (2) im Abstand zueinander befestigt sind und deren innere freie Schmalseiten die Außenwand des Ofenrohrs (1) berühren und dort kraftschlüssig gelagert sind.1. Device for the indirect exchange of heat between the medium flowing through and surrounding media, characterized in that
that around a stovepipe (1) made of thermally conductive material, strand-shaped profile ribs (3) are arranged radially and releasably, the outer narrow sides of which are fastened to one another at least one bandage (2) and the inner free narrow sides of which touch the outer wall of the stovepipe (1) and are non-positively stored there. 2. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Bandagen-Enden durch einen Verschluß, vorzugsweise einen Schnellspann-Verschluß (5), miteinander verbindbar sind.2. Device according to claim 1,
characterized,
that the bandage ends can be connected to one another by a fastener, preferably a quick-action fastener (5). 3. Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Profilrippen (3) derart ausgebildet und auf der Bandage (2) angeordnet sind, daß durch Verlängern oder Verkürzen der Bandage (2) um eine Rippe eine Anpassung an den nächstgrößeren oder nächstkleineren handelsüblichen Ofenrohrdurchmesser erreichbar ist.3. Device according to claim 1 or 2,
characterized,
that the profile ribs (3) are designed and arranged on the bandage (2) such that an extension to the next larger or smaller commercial stovepipe diameter can be achieved by lengthening or shortening the bandage (2) by one rib. 4. Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die beiden an den Enden der Bandage angeordneten Profilrippen (3) in der Mitte ihrer Länge mit je einem nach außen weisenden Handgriff versehen sind.4. Device according to one of claims 1 to 3,
characterized,
that the two profile ribs (3) arranged at the ends of the bandage are each provided with an outwardly facing handle in the middle of their length. 5. Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die Profilrippen (3) in radialer Richtung flexibel gestaltet sind.5. Device according to one of claims 1 to 4,
characterized,
that the profile ribs (3) are designed to be flexible in the radial direction.
EP81110863A 1981-12-31 1981-12-31 Heat exchanger Withdrawn EP0083379A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP81110863A EP0083379A1 (en) 1981-12-31 1981-12-31 Heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP81110863A EP0083379A1 (en) 1981-12-31 1981-12-31 Heat exchanger

Publications (1)

Publication Number Publication Date
EP0083379A1 true EP0083379A1 (en) 1983-07-13

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ID=8188097

Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215144A (en) * 1991-02-18 1993-06-01 Siemens Aktiengesellschaft Heat exchanger
FR2698714A1 (en) * 1992-12-02 1994-06-03 Robatel Slpi Removable heat-dissipating assembly - for radioactive material container has U-section vanes threaded on wires
AU720622B2 (en) * 1995-08-23 2000-06-08 Tony Asplet Heat exchange covering

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339385A (en) * 1917-11-21 1920-05-11 Escher Wyss Maschf Ag Ribbed body for heat-interchange devices
US1942211A (en) * 1933-04-20 1934-01-02 Charles W Hartwig Combination guard and heat transfer device
CH215616A (en) * 1940-11-18 1941-07-15 Staub Willy Stovepipe attachment.
CH216893A (en) * 1940-11-06 1941-09-30 Schaerer Hans Smoke pipe jacket.
CH253330A (en) * 1947-07-22 1948-02-29 Wera Apparatebau Ag Method for producing a rib body and rib bodies produced by the method.
US2756032A (en) * 1952-11-17 1956-07-24 Heater
CH461055A (en) * 1967-09-12 1968-08-15 Baechli Karl Heat emitting device that can be attached around a cylindrical support part
US4236578A (en) * 1978-05-04 1980-12-02 Condar, Co. Heat exchange enhancement structure
GB1588120A (en) * 1977-12-06 1981-04-15 Judson P N Condenseres

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1339385A (en) * 1917-11-21 1920-05-11 Escher Wyss Maschf Ag Ribbed body for heat-interchange devices
US1942211A (en) * 1933-04-20 1934-01-02 Charles W Hartwig Combination guard and heat transfer device
CH216893A (en) * 1940-11-06 1941-09-30 Schaerer Hans Smoke pipe jacket.
CH215616A (en) * 1940-11-18 1941-07-15 Staub Willy Stovepipe attachment.
CH253330A (en) * 1947-07-22 1948-02-29 Wera Apparatebau Ag Method for producing a rib body and rib bodies produced by the method.
US2756032A (en) * 1952-11-17 1956-07-24 Heater
CH461055A (en) * 1967-09-12 1968-08-15 Baechli Karl Heat emitting device that can be attached around a cylindrical support part
GB1588120A (en) * 1977-12-06 1981-04-15 Judson P N Condenseres
US4236578A (en) * 1978-05-04 1980-12-02 Condar, Co. Heat exchange enhancement structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5215144A (en) * 1991-02-18 1993-06-01 Siemens Aktiengesellschaft Heat exchanger
FR2698714A1 (en) * 1992-12-02 1994-06-03 Robatel Slpi Removable heat-dissipating assembly - for radioactive material container has U-section vanes threaded on wires
AU720622B2 (en) * 1995-08-23 2000-06-08 Tony Asplet Heat exchange covering

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