EP0743500A2 - Brûleur à récupération - Google Patents

Brûleur à récupération Download PDF

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Publication number
EP0743500A2
EP0743500A2 EP96106942A EP96106942A EP0743500A2 EP 0743500 A2 EP0743500 A2 EP 0743500A2 EP 96106942 A EP96106942 A EP 96106942A EP 96106942 A EP96106942 A EP 96106942A EP 0743500 A2 EP0743500 A2 EP 0743500A2
Authority
EP
European Patent Office
Prior art keywords
mat
wire
duct
heat
air duct
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Withdrawn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
EP96106942A
Other languages
German (de)
English (en)
Other versions
EP0743500A3 (fr
Inventor
Paul Freieck
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.)
L B E FEUERUNGSTECHNIK GMBH
Original Assignee
LBE Beheizungseinrichtungen 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 LBE Beheizungseinrichtungen GmbH filed Critical LBE Beheizungseinrichtungen GmbH
Publication of EP0743500A2 publication Critical patent/EP0743500A2/fr
Publication of EP0743500A3 publication Critical patent/EP0743500A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F28F1/122—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 being formed of wires

Definitions

  • the invention relates to a recuperator burner with an annular exhaust gas duct and an annular air duct, which are separated from one another by a tubular, heat-transmitting wall.
  • the heat transfer in the recuperator depends on the heat transfer surface, the gas velocities and the temperature difference.
  • the latter can be assumed to be constant in the stationary operating state.
  • the gas velocities can be increased to increase the heat transfer, but only within certain limits, since the pressure losses increase with the square of the gas velocities.
  • To increase the heat transfer surface it is known to provide it with ribs or to form it as a bellows in such a way that exhaust gas conduction channels and air conduction channels alternate in the circumferential direction.
  • the invention has for its object to further increase the heat transfer in the recuperator with simple and inexpensive means.
  • the recuperative burner according to the invention is characterized in that a tubular mat made of heat-resistant material is inserted into the exhaust gas duct and / or into the air duct.
  • the mats heat up and transfer some of the heat through radiation.
  • the heat transfer in the recuperator does not mainly take place through convection, but also partly through radiation.
  • the recuperator efficiency of the burner according to the invention corresponds approximately to that of a fin recuperator.
  • the smooth tube recuperator thus compensates for the much larger heat exchanger area of the fin recuperator. Above this temperature, the efficiency increases compared to that of a fin recuperator, the difference increasing with increasing temperature, since the radiation does not increase linearly but according to the T 4 law.
  • Another important advantage that affects the entire temperature range is the low manufacturing costs and the low weight of the mat.
  • Existing smooth tube recuperators can also be easily retrofitted.
  • the main field of application of the invention is ceramic burners which have smooth tube recuperators for manufacturing reasons. Their efficiency is only 70%, based on the efficiency of a fin recuperator. Since the mat raises the efficiency in the upper temperature range above that of a fin recuperator, the increase achieved in ceramic burners is particularly striking.
  • the flow resistance of the mat is relatively low. This applies in particular if the mat occupies less than approx. 10% of the free passage cross section of the exhaust gas duct or the air duct.
  • the low pressure drop allows relatively low flow speeds, so that less powerful fans can be used.
  • the mat be made of wire, for example of wire wedges pushed into one another.
  • the manufacturing effort is very low.
  • the mat may consist of carbon fibers.
  • the diameter of the carbon fibers or of the wire is preferably less than 3 mm, preferably approximately 1.2 mm. It has been found that pressure loss and radiation intensity can be optimized in this way.
  • the burner shown has a gas lance, not shown, which is surrounded by a recuperator 2.
  • the latter consists of an annular air duct 3 and an annular exhaust duct 4, these being separated from one another by a tubular, heat-transmitting wall 5.
  • a tubular mat 6 made of heat-resistant material is placed in each of the air duct 3 and the exhaust duct 4.
  • the mat 6 consists of wire and has a structure, as can be seen in particular from FIG. 2.
  • the mats 6 heat up and cause heat transfer by radiation. This increases with increasing temperature in the fourth power, compared to the linear increase in convective heat transfer. From 900 ° C upwards, the recuperator efficiency exceeds that of a finned heat exchanger.
  • the mats 6 occupy approximately 5% of the free passage cross section of the air duct 3 or the exhaust duct 4. Due to this fact and their already low flow resistance, the pressure loss is comparatively low. Accordingly, a fan with a weaker dimension is used.
  • the burner shown schematically consists of ceramic material.
  • the invention is also applicable to Steel structures. Above all, it can be used in radiant heating pipes.
  • a mat of carbon fibers or a structure made of wire coils pushed into one another can be used.
  • the diameter of the carbon fibers or wire is approximately 1.2 mm.
  • Heat-resistant plastic fibers can also be used.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Air Supply (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP96106942A 1995-05-18 1996-05-03 Brûleur à récupération Withdrawn EP0743500A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19518296 1995-05-18
DE1995118296 DE19518296A1 (de) 1995-05-18 1995-05-18 Rekuperatorbrenner

Publications (2)

Publication Number Publication Date
EP0743500A2 true EP0743500A2 (fr) 1996-11-20
EP0743500A3 EP0743500A3 (fr) 1997-11-26

Family

ID=7762273

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96106942A Withdrawn EP0743500A3 (fr) 1995-05-18 1996-05-03 Brûleur à récupération

Country Status (2)

Country Link
EP (1) EP0743500A3 (fr)
DE (1) DE19518296A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0854345A1 (fr) * 1997-01-21 1998-07-22 VIESSMANN WERKE GmbH & CO. Echangeur de chaleur
WO1998031976A1 (fr) * 1997-01-21 1998-07-23 Viessmann Werke Gmbh & Co. Element echangeur de chaleur
DE19961284A1 (de) * 1999-12-18 2001-07-12 Bosch Gmbh Robert Wärmeübertrager für Gasheizgeräte, insbesondere Brennwertgeräte
US8986001B2 (en) 2009-12-16 2015-03-24 Eclipse, Inc. Burner with improved heat recuperator
EP3133344A1 (fr) * 2015-08-20 2017-02-22 AICHELIN Holding GmbH Bruleur a recuperation comprenant un recuperateur ceramique et procede de fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011103106A1 (de) 2011-05-25 2012-11-29 Erbicol S.A. Wärmeübertrager aus keramischem Material, insbesondere für Rekuperatorbrenner, und Verfahren zu dessen Herstellung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310303A (en) * 1980-07-11 1982-01-12 W. B. Combustion, Inc. Plug-in recuperator and method

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069165B (de) * 1959-11-19 GEA-Luftkuhl'er-Gcsellschaft m.b. H., Bochum Röhrenwarmeaustauscher für strömende Medien mit in den Rohren uim die Rohrlärtgsachse schraubenförmig gewundenen Bandblechen
AT19301B (fr) * 1903-09-15 1905-02-25 Ignaz Wasniczek
DE567819C (de) * 1929-06-22 1933-01-10 Aeg Feuerung, insbesondere fuer Dampfkessel
DE975537C (de) * 1948-04-28 1962-01-11 Svenska Maskinverken Ab Waermeaustauscher
FR1026192A (fr) * 1949-09-19 1953-04-24 Procédé de fabrication d'échangeurs calorifiques et les échangeurs calorifiques otenus conformément audit procédé
DE1097461B (de) * 1959-05-16 1961-01-19 Daimler Benz Ag Verfahren zum Reinigen von Regenerativwaermetauschern
FR1274532A (fr) * 1960-09-06 1961-10-27 Teikoku Sanso Kabushiki Kaisha Nouveaux régénérateurs à garnissage et faisceau tubulaire bobiné
GB1056104A (en) * 1962-07-20 1967-01-25 Oestbo John D B Improvements in or relating to heat-exchangers, pre-heaters and economizers
FR2453381A1 (fr) * 1979-04-03 1980-10-31 Ferodo Sa Perfectionnements apportes aux echangeurs de chaleur et, notamment aux appareils de ce genre qui comportent des tubes
DE2948048C2 (de) * 1979-11-29 1981-10-08 Aichelin GmbH, 7015 Korntal Industriebrenner
DE3017574C2 (de) * 1980-05-08 1985-06-05 Wieland-Werke Ag, 7900 Ulm Abstandshalter für koaxiale Wärmeübertrager
US4432408A (en) * 1982-07-19 1984-02-21 The Dow Chemical Co. Method and compressed vermicular expanded graphite apparatus for heat exchanging
GB2137332B (en) * 1983-03-29 1986-06-18 Arrenshaw Improvements in or relating to heat exchangers
WO1987007695A1 (fr) * 1986-06-16 1987-12-17 Le Carbone Lorraine Contact thermique a fort coefficient de transfert et applications au refroidissement d'une structure soumise a un flux thermique intense
US5211219A (en) * 1990-07-31 1993-05-18 Daikin Industries, Ltd. Air conditioner
DE4132236C1 (fr) * 1991-09-27 1992-10-15 Ws Waermeprozesstechnik Gmbh, 7253 Renningen, De
US5390734A (en) * 1993-05-28 1995-02-21 Lytron Incorporated Heat sink

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310303A (en) * 1980-07-11 1982-01-12 W. B. Combustion, Inc. Plug-in recuperator and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0854345A1 (fr) * 1997-01-21 1998-07-22 VIESSMANN WERKE GmbH & CO. Echangeur de chaleur
WO1998031976A1 (fr) * 1997-01-21 1998-07-23 Viessmann Werke Gmbh & Co. Element echangeur de chaleur
DE19961284A1 (de) * 1999-12-18 2001-07-12 Bosch Gmbh Robert Wärmeübertrager für Gasheizgeräte, insbesondere Brennwertgeräte
US8986001B2 (en) 2009-12-16 2015-03-24 Eclipse, Inc. Burner with improved heat recuperator
EP3133344A1 (fr) * 2015-08-20 2017-02-22 AICHELIN Holding GmbH Bruleur a recuperation comprenant un recuperateur ceramique et procede de fabrication

Also Published As

Publication number Publication date
EP0743500A3 (fr) 1997-11-26
DE19518296A1 (de) 1996-11-21

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