EP0217320A2 - Chaudière pour combustibles liquides ou gazéiformes - Google Patents

Chaudière pour combustibles liquides ou gazéiformes Download PDF

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Publication number
EP0217320A2
EP0217320A2 EP86113322A EP86113322A EP0217320A2 EP 0217320 A2 EP0217320 A2 EP 0217320A2 EP 86113322 A EP86113322 A EP 86113322A EP 86113322 A EP86113322 A EP 86113322A EP 0217320 A2 EP0217320 A2 EP 0217320A2
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
longitudinal ribs
area
region
boiler
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.)
Ceased
Application number
EP86113322A
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German (de)
English (en)
Other versions
EP0217320A3 (fr
Inventor
Hans Dr. Viessmann
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0217320A2 publication Critical patent/EP0217320A2/fr
Publication of EP0217320A3 publication Critical patent/EP0217320A3/fr
Ceased 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
    • F24H1/263—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 with a dry-wall combustion chamber
    • 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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels

Definitions

  • the invention relates to a boiler for liquid or gaseous fuels according to the preamble of the main claim and in particular for an operation in the so-called low or low temperature range.
  • a boiler of this type is known from DE-OS 33 27 354. Apart from this, almost every modern boiler today is basically designed in this way, which is therefore well known and in so far does not require any printed evidence. Such boilers differ only in their design variants, for which reference is made, for example, to DE-OS 32 O8 731 and FR-PS 23 2O 5O4, the prior art heating boilers according to these publications being particularly distinguished by the basic double-shell nature of their heat transfer surfaces.
  • the longitudinal ribs were therefore practically continuous over the entire length of the burner side towards the discharge side with a correspondingly large fin spacing (approx. 20 mm) and in the space between this "all-round ribbing" is the pot-like combustion chamber, which, apart from a relatively short inflow area into the rib spaces or draft channels, also extends almost over the entire length of the longitudinal ribs.
  • the entire length of the burner flame burns into the pot-shaped combustion chamber, in which the heating gases are then deflected and flow back into the heating gas flues delimited by the ribs on the edge of the burner.
  • the NOX value reduction to be taken into account is one of the following situations: Boilers of the type mentioned at the beginning, which are operated with extremely hot combustion chamber pots, result in high NOX values.
  • part of the flame heat is transferred directly by radiation in the front area of the combustion chamber, but if you do not want to increase the resistance in the ring channel extremely, this is done at the cost of reducing the effective rib transfer area which can be accommodated per se .
  • DE-OS 32 O8 731 only a relatively small part of the flame heat should be able to be transmitted by radiation, so that the combustion chamber pot itself remains correspondingly highly loaded.
  • the invention is therefore based on the object of improving a boiler of the type mentioned in such a way that the heat transfer surface arrangement and heat transfer surface distribution with at least the same or less manufacturing effort to the actual type of heat supply in the pipe train under consideration one the greatest possible prevention of condensation should be adapted with the provision of an at least partial flow resistance laying from the front area in the downstream half of the pipe run, while maintaining or approximately maintaining the effective fin transfer surface, which is normally present in such boilers in the pipe run.
  • the heat transfer area of the fins is therefore reduced in the front half of the pipe run and in the rear half, ie where the overall shortened pot-like combustion chamber is arranged, by concentration or “compression” enlarged, but without reducing the "normal” total transfer area.
  • “Normal” ribbing is to be understood here as one in which the longitudinal ribs with the same height extend over almost the entire length of the pipe run. The entire heat transfer surface arrangement and distribution is thus made such that the heat transfer in the front area, unhindered by the combustion chamber, takes place essentially by radiation and in the area of the concentrated heat transfer surfaces by convection, which, as has been shown, is more appropriate to the actual heat transfer processes.
  • the front Be rich in which the heat is essentially transmitted by radiation, but in this regard and, as mentioned, is designed in such a way that no condensation can occur here either; in addition, however, a remaining part of the ribbing is left there, either with a reduced rib height and / or in a "thinned out” arrangement, ie with a smaller number in terms of its circumferential distribution.
  • this makes this area of radiation transmission accessible and, in addition, the transmission area there is larger due to the remaining "residual ribs" than that of a completely non-ribbed area, as is the case with the boiler according to FR-PS 23 2O 5O4.
  • one embodiment of the boiler is that the double-shell wall is formed on the inside in the form of an inner shell formed from several cast rings.
  • the rings are divided into two groups, namely a combustion chamber group for the convective heat transfer and a group arranged in front of it with a smaller number of longitudinal ribs for the radiant heat transfer or with the same number of longitudinal ribs and their height then, however, is reduced.
  • the design of the boiler according to the invention leads to the following:
  • At least half of the pipe run is made accessible to heat transfer by radiation while at the same time having a condensate-preventing design and a corresponding shortening of the combustion chamber.
  • the possibility is ge manage to concentrate or enlarge the convection heating surface in the area of the shortened combustion chamber.
  • the shortened path of the flame or heating gases along the short combustion chamber leads to a reduction in NOX.
  • the known and proven principle of a double-shell design can be applied to the principle according to the invention without any problems, in various embodiments, in particular when the heating boiler is to be operated in low-temperature mode.
  • the convection surface compression has the advantage of being able to operate the boiler with a two-stage burner, especially if it is a boiler with a lower output, which does not mean that the exhaust gas temperature drops undesirably at a reduced output stage, because the exhaust gases flow more slowly through the concentrated convection surface at the lower power level and correspondingly reduced gas volume and give off less heat accordingly.
  • the solution according to the invention thus represents an advantageous compromise in which only part of the ribbing before The combustion chamber pot is installed in the area in order to meet the complex requirements, as explained.
  • the boiler according to the embodiment shown in FIG. 2 is designed such that at least the wall of the pipe 1 extending in front of the combustion chamber 2 is designed as a double-walled wall 4.
  • This two-shell wall 4 is formed on the inside in the form of an inner shell 5, which is in thermal contact with the inner wall surface 6 of the pipe run 1 at least in partial areas.
  • the inner shell 5 can also be formed from the base webs 6 'of tightly welded-on rib profiles 7, which, as shown, can be rectangular, U-shaped, rib-fold profiles or the like .
  • the inner shell 5 can also be formed in the region of the combustion chamber 2 or the convection in the form of a cylindrical insert 7, which is formed from several, each having a plurality of longitudinal ribs 8, correspondingly curved extruded profiles 9, which are joined together with longitudinal seams to form a cylindrical insert.
  • the exemplary embodiments described so far are particularly intended for heating boilers whose pipe diameter is in the order of magnitude of approximately 60 cm.
  • the embodiment according to FIG. 4 is particularly suitable for pipe runs 1 with a smaller diameter.
  • the double-shell wall 4 is formed on the inside in the form of an inner shell 5 formed from a plurality of cast rings 10.
  • the number of longitudinal ribs 3 on the cast rings 10 from the burner side 11 to the discharge side 12 can be dimensioned increasingly, which is not particularly shown.
  • the boiler is designed in such a way that the rings 10 are divided into two groups, namely a combustion chamber group 13 (convection area) and a group 14 arranged in front (radiation area) ) with a smaller number of longitudinal ribs 13.
  • the foremost ring 10 in the area of the combustion chamber 2 or in the convection area 13, as can be seen in FIG. 7, is very densely occupied with longitudinal ribs 3, the distance A of which is only about 12 is up to 15 mm, whereby the high concentration of heat transfer surface is achieved in this area.
  • the rings 10 located in front of them, ie the rings in the radiation region 14, a considerable "thinning" of the rib trim is provided, to be precise as far as can be seen from FIGS. 5, 6.
  • the inner surface 19 of the rings is more or less exempted for direct exposure to radiation and also the ribs 3 and 3 'have a stiffening function for the thin-walled cast rings and at the same time facilitate the insertion of the extremely shortened combustion chamber 2 in the convection chamber located in the rear half rich 13.
  • the length of the longitudinal ribs 3 may correspond to the height of the ribs of the rings 10 in the convection area 13 or may be reduced accordingly with respect to their height with an increased number, if necessary.

Landscapes

  • 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)
  • Commercial Cooking Devices (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP86113322A 1985-10-03 1986-09-27 Chaudière pour combustibles liquides ou gazéiformes Ceased EP0217320A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3535341 1985-10-03
DE19853535341 DE3535341A1 (de) 1985-10-03 1985-10-03 Heizkessel fuer fluessige oder gasfoermige brennstoffe

Publications (2)

Publication Number Publication Date
EP0217320A2 true EP0217320A2 (fr) 1987-04-08
EP0217320A3 EP0217320A3 (fr) 1987-11-25

Family

ID=6282685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113322A Ceased EP0217320A3 (fr) 1985-10-03 1986-09-27 Chaudière pour combustibles liquides ou gazéiformes

Country Status (2)

Country Link
EP (1) EP0217320A3 (fr)
DE (1) DE3535341A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331141A2 (fr) * 1988-03-03 1989-09-06 Hans Dr. Viessmann Chaudière
EP0359102A1 (fr) * 1988-09-13 1990-03-21 Hans Dr. Viessmann Chaudière

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400400A1 (de) * 1994-01-08 1995-07-13 Viessmann Werke Kg Dreizug-Heizkessel

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2165669A5 (fr) * 1971-12-22 1973-08-03 Beondu Ag
FR2320504A1 (fr) * 1975-08-05 1977-03-04 Buderus Eisenwerk Chaudiere de chauffage central
FR2449254A1 (fr) * 1979-02-19 1980-09-12 Viessmann Hans Chaudiere pour combustibles liquides ou gazeux
DE3208731A1 (de) * 1982-03-11 1983-09-22 Buderus Ag, 6330 Wetzlar Heizkessel
EP0120435A2 (fr) * 1983-03-21 1984-10-03 Hans Dr. Viessmann Structure du parcours du gaz de chauffage dans une chaudière de chauffage
DE3327354A1 (de) * 1983-07-29 1985-02-14 Hans Dr.h.c. 3559 Battenberg Vießmann Heizungskessel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948864C2 (de) * 1979-12-05 1982-10-14 Hans 3559 Battenberg Vießmann Heizungskessel für die Verbrennung von flüssigen oder gasförmigen Brennstoffen
DE3205121C2 (de) * 1982-02-12 1985-11-28 Hans Dr.h.c. 3559 Battenberg Vießmann Heizungskessel

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2165669A5 (fr) * 1971-12-22 1973-08-03 Beondu Ag
FR2320504A1 (fr) * 1975-08-05 1977-03-04 Buderus Eisenwerk Chaudiere de chauffage central
FR2449254A1 (fr) * 1979-02-19 1980-09-12 Viessmann Hans Chaudiere pour combustibles liquides ou gazeux
DE3208731A1 (de) * 1982-03-11 1983-09-22 Buderus Ag, 6330 Wetzlar Heizkessel
EP0120435A2 (fr) * 1983-03-21 1984-10-03 Hans Dr. Viessmann Structure du parcours du gaz de chauffage dans une chaudière de chauffage
DE3327354A1 (de) * 1983-07-29 1985-02-14 Hans Dr.h.c. 3559 Battenberg Vießmann Heizungskessel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0331141A2 (fr) * 1988-03-03 1989-09-06 Hans Dr. Viessmann Chaudière
EP0331141A3 (en) * 1988-03-03 1990-04-18 Hans Dr. Viessmann Boiler
EP0359102A1 (fr) * 1988-09-13 1990-03-21 Hans Dr. Viessmann Chaudière

Also Published As

Publication number Publication date
DE3535341A1 (de) 1987-04-09
EP0217320A3 (fr) 1987-11-25

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