EP1008819A2 - Niedrigtemperatur-Warmwassergenerator - Google Patents

Niedrigtemperatur-Warmwassergenerator Download PDF

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Publication number
EP1008819A2
EP1008819A2 EP99500235A EP99500235A EP1008819A2 EP 1008819 A2 EP1008819 A2 EP 1008819A2 EP 99500235 A EP99500235 A EP 99500235A EP 99500235 A EP99500235 A EP 99500235A EP 1008819 A2 EP1008819 A2 EP 1008819A2
Authority
EP
European Patent Office
Prior art keywords
generator
water
pipes
gases
steam
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Withdrawn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
EP99500235A
Other languages
English (en)
French (fr)
Other versions
EP1008819A3 (de
Inventor
Juan Uceda
Gonzalo Santodomingo
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.)
Vulcano-Sadeca SA
Original Assignee
Vulcano-Sadeca SA
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 Vulcano-Sadeca SA filed Critical Vulcano-Sadeca SA
Publication of EP1008819A2 publication Critical patent/EP1008819A2/de
Publication of EP1008819A3 publication Critical patent/EP1008819A3/de
Withdrawn legal-status Critical Current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
    • F24H9/00—Details
    • F24H9/0005—Details for water heaters
    • F24H9/001—Guiding means
    • F24H9/0026—Guiding means in combustion gas channels
    • 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
    • F24H1/28—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 including one or more furnace or fire tubes
    • F24H1/287—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 including one or more furnace or fire tubes with the fire tubes arranged in line with the 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
    • 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
    • F24H1/28—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 including one or more furnace or fire tubes
    • F24H1/285—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 including one or more furnace or fire tubes with the fire tubes arranged alongside the 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
    • F24H9/0036—Dispositions against condensation of combustion products
    • 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

Definitions

  • the present invention refers to a hot water generator for operation at low temperature, being of the pyrotubular type with a pressurized furnace and two gas stages.
  • a series of systems for heating water are already known, such as heating boilers, whether domestic or industrial.
  • the Spanish patent No. 2012161 filed on December 2, 1988, in the name of Genaro Arana Uriarte, describes a water heating system which consists of two water circulation circuits, one of which is made up of two parallel vertical pipes connected with other horizontal pipes of smaller diameter.
  • the second circuit has an inlet pipe wound helicoidally around the first circuit. This winding is continued in a spiral and finally descends along a vertical outlet section.
  • the focus of heat, defined by gas burners, is situated below the tubular bundle of the first water circulation circuit.
  • the European patent 0 387 584 filed on September 19, 1990 in the name of Dr. Hans Viessmann, describes gas-fired piping intended particularly for low-temperature boilers, in which several gas-fired pipes from a combustion chamber or a supply chamber are arranged horizontally inside the mantel of the boiler, through which water circulates, meeting in a steam-collecting chamber.
  • Each set of gas-fired pipes is made up of two adjacent pipes, of which the outer pipe, on the side adjoining the steam outlet, is firmly supported upon the inner pipe which transmits the heat, and the outer pipe is provided with radial ribs.
  • the gas-fired piping is designed in such a way that in the steam outlet area, between the outer pipe and the inner one there is a metallic sleeve which transmits the heat to both pipes, the wall thickness of the sleeve being thinner than that of the pipes.
  • the European patent 0 397 586 filed on November 14, 1990, in the name of De Dietrich Thermique, describes a eating body for a low-temperature boiler.
  • This boiler has a frontal facade and a rear facade, and a plurality of channels for steam circulation. It is characterised in that the frontal facade has at least one changing support, provided with peaks directed towards the plane of the facade and, moreover, at least one water circulation channel placed against the said supports and in contact with the furnace.
  • Viessmann organisation has developed a three-stage steam boiler with multiple wall heating surfaces in which the large water chambers allow internal recirculation and heat transmission. Gas combustion is carried out with reduced pollution emission as it uses two-stage, fan-assisted burners for gasoil/gas.
  • the object of the present invention is to develop an improved hot water generator for operation at low temperature, being a pyrotubular generator with a pressurised furnace and two gas stages.
  • the first of these is made up of the furnace proper, from the generator's supply to the blind part of the furnace made up of the internal rear wall, and the gases return at this point to be inverted at the cleaning door of the generator, between the front wall and the fireproof cement of the said door.
  • the second stage is from the cleaning door to the gas box, passing through the steam pipes, and subsequently the gases are expelled through the chimney.
  • the object of the present invention is a hot water generator for operation at low temperature, of the pyrotubular type with a pressurised furnace and two stages of gas combustion, of which the first is made up of the furnace, which is water-cooled, from the generator's supply to the blind part of the furnace formed by the internal rear wall where the combustion gases return to be inverted at the generator's cleaning door; the second stage takes place in the generator, from the cleaning door to the combustion gases door, where these gases pass through steam pipes and are subsequently expelled through the chimney.
  • the generator is characterised in that it has a circuit of gases made up of the elements that are in contact with the combustion gases, namely the furnace designed to house the development of the flame, a tubular bundle made up of steam pipes through which the combustion gases circulate, enveloping pipes with a greater diameter than that of the steam pipes and installed concentrically with respect to the said steam pipes with their ends slightly extruded and welded to the steam pipes, gas turbulators of helicoidal shape, with an external diameter equal to the internal diameter of the steam pipes, and a double wall situated between the steam box and the external rear wall.
  • the generator also has a water circuit made up of the elements of the generator which are in contact with the water, such as a water outlet tap situated in the upper generatrix of the enveloping part or external ferrule for taking the water from the generator to the heating circuit, a return water tap situated in the rear area of the generatrix of the external ferrule, for taking the water from the heating circuit to the the generator, a deflector situated inside the external ferrule between the outlet and return turbulators, and a safety tap situated in the central area of the external ferrule.
  • a water outlet tap situated in the upper generatrix of the enveloping part or external ferrule for taking the water from the generator to the heating circuit
  • a return water tap situated in the rear area of the generatrix of the external ferrule, for taking the water from the heating circuit to the the generator
  • a deflector situated inside the external ferrule between the outlet and return turbulators
  • a safety tap situated in the central area of the external ferrule.
  • a completely watertight air chamber is formed, which allows the temperature difference to be increased between the steam pipe and the wall that is in contact with the water at low temperature in the enveloping pipe.
  • the gas turbulators of the generator that is the object of the invention put the products of combustion in a turbulent state, which creates a greater exchange between the gases and the exchange surfaces.
  • the double wall of the generator creates an air chamber between the external rear wall and the steam box, which increases the temperature difference between the cold side of the water circuit and the cold side of the gases.
  • the deflector of the generator that is the object of this application is arranged in such a way that the circulating water moves in a zig-zag, and thus a better heat exchange is obtained between gases and water.
  • this shows a cross section view of the hot water generator for operation at low temperature that is the object of the invention.
  • this generator is made up of two stages of combustion gases.
  • the first of these is the furnace (H) comprising from the generator's supply to the blind part of the furnace (H), the latter being formed by the internal rear wall (FT), and the gases return at this point to be inverted at the cleaning door (PL) of the generator, between the front wall (FD) and the fireproof cement of the said cleaning door (PL).
  • the second stage is located in the generator and goes from the cleaning door (PL) to the steam box (CH) through the steam pipes (TH), and is subsequently expelled through the chimney (not shown).
  • the generator in accordance with the invention has two totally differentiated circuits, which are the gases circuit and the water circuit.
  • the first of these is formed by the parts of the generator that are in contact with the combustion gases, such as the furnace (H), which is the part designed to house the development of the flame, this part being completely cooled by water that is not located in the centre of the generator.
  • the gases circuit also has a tubular bundle which is made up of steam pipes (TH), enveloping pipes (TE), gas turbulators (TG) (see figure 2) and a double rear wall (DFT).
  • TH steam pipes
  • TE enveloping pipes
  • TG gas turbulators
  • DFT double rear wall
  • the steam pipes (TH) are, in this embodiment, made of high-quality drawn steel without welding (St.) 35.8.1, in accordance with the DIN 17175 standard. They are heat-resistant pipes through which the gases that are produced by combustion circulate, either from liquid or gaseous fuel.
  • the enveloping pipes (TE) are made of high-quality drawn steel without welding (St.) 35.8.I, in accordance with the DIN 17175 standard.
  • the enveloping pipes (TE) are of greater diameter than that of the steam pipes (TH), and they are installed concentrically with respect to the said steam pipes (TH), the ends of the same being slightly extruded (see figure 2), so that there will be a perfect coupling between the two pipes (TH) and (TE).
  • the steam pipes (TH), the enveloping pipes (TE) and the gas turbulators (TG) will be explained with greater detail in relation to figure 2.
  • the fourth element that makes up the tubular bundle is that formed by a double wall (DFT) located between the steam box (CH) and the external rear wall (FT).
  • DFT double wall
  • the function of this fourth element of the gas circuit is to prevent excessive cooling of the gases by creating an air chamber (CA) between the external rear wall (FT) and the steam box (CH), thereby increasing the temperature difference between the cold side of the water circuit and the cold side of the gases.
  • CA air chamber
  • the generator in accordance with the invention has also a water circuit which is made up of the parts of the generator which are in contact with the water.
  • a water outlet tap (TSA) which is situated in the upper generatrix of the enveloping part or external ferrule (VE).
  • TSA water outlet tap
  • VE external ferrule
  • TRA water return tap
  • a deflector Inside the external ferrule (VE) and between the water outlet tap (TSA) and the water return tap (TRA) there is a deflector (D), which gives the water from the heating circuit a zig-zag movement. This movement produces a better heat exchange between the combustion gases and the water, and also prevents the cold water from the return tap (TRA) from going directly to the water outlet tap (TSA), which would result in a poorer performance on the part of the generator.
  • This deflector is particularly recommended for hot water generators at low temperature, as is the case of the generator that is the object of the application.
  • TEX expansion or safety tap
  • this shows a detail of some elements (TH, TE, TG) of the gases circuit.
  • an enveloping pipe (TE) is mounted concentrically with its ends slightly extruded so as to obtain a perfect coupling between the two pipes.
  • a completely watertight weld (S) thus achieving a completely watertight air chamber (CA') whose function is to increase the temperature difference between the steam pipe (TH) and the wall that is in contact with the water at low temperature in the enveloping pipe (TE), thus preventing condensation of the combustion products.
  • CA' completely watertight air chamber
  • a gas turbulator which is made up of a calibrated steel disc manufactured in a helicoidal shape and with the same external diameter as the internal diameter of the steam pipe (TH).
  • This gas turbulator (TG) has the function of putting the combustion gases in a turbulent state, thus obtaining a greater exchange between the gases and the exchange surfaces.
  • DFT double rear wall located between the steam box (TH) (see figure 1) and the external rear wall (FT).

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP99500235A 1998-12-11 1999-12-10 Niedrigtemperatur-Warmwassergenerator Withdrawn EP1008819A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES009802575A ES2156689B1 (es) 1998-12-11 1998-12-11 Generador de agua caliente para funcionamiento a baja temperatura.
ES9802575 1998-12-11

Publications (2)

Publication Number Publication Date
EP1008819A2 true EP1008819A2 (de) 2000-06-14
EP1008819A3 EP1008819A3 (de) 2002-09-25

Family

ID=8306053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99500235A Withdrawn EP1008819A3 (de) 1998-12-11 1999-12-10 Niedrigtemperatur-Warmwassergenerator

Country Status (2)

Country Link
EP (1) EP1008819A3 (de)
ES (2) ES2156689B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369647A2 (de) * 2002-06-04 2003-12-10 Bradford White Corporation Brennwertkessel
US8807093B2 (en) 2011-05-19 2014-08-19 Bock Water Heaters, Inc. Water heater with multiple heat exchanging stacks
US10184690B2 (en) 2017-02-09 2019-01-22 Bock Water Heaters, Inc. Condensing water heater and condensation control system
CN113203240A (zh) * 2021-04-27 2021-08-03 太和县大华能源科技有限公司 一种工业循环水系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2188392B1 (es) * 2001-08-17 2004-10-16 Vulcano-Sadeca S.A. Generador de agua caliente para funcionamiento a condensacion.
EP2799792A3 (de) 2013-04-23 2014-11-19 Caldereria Quintin, S.L. Gas-Wärmetauscher für Heizkessel zum Verbrennen von Festbrennstoffen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2012161A6 (es) 1988-12-02 1990-03-01 Arana Uriarte Genaro Sistema de calentamiento de agua.
EP0387584A2 (de) 1989-03-11 1990-09-19 Hans Dr. Viessmann Heizgaszugrohr
EP0397586A1 (de) 1989-05-10 1990-11-14 De Dietrich Thermique Kesselglied für Niedertemperatur-Heizkessel
EP0573742A1 (de) 1992-06-06 1993-12-15 INTERDOMO GmbH & CO. Heizungs- und Wärmetechnik Heizkessel für Niedertemperaturheizungen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3171388A (en) * 1956-10-10 1965-03-02 Ygnis Sa Heating apparatus
CH624206A5 (de) * 1977-02-18 1981-07-15 Eugen Josef Siegrist
CH628134A5 (de) * 1978-03-28 1982-02-15 Ygnis Sa Rauchgasdurchstroemter waermetauscher.
CH638883A5 (de) * 1979-08-27 1983-10-14 Eugen Josef Siegrist Heizkessel.
DE3440006A1 (de) * 1984-11-02 1986-05-07 Buderus Ag, 6330 Wetzlar Heizungskessel
ES283900Y (es) * 1985-01-10 1986-04-16 Philopatent Sa Caldera con alto grado de rendimiento bajo cualquier carga
AT387450B (de) * 1986-03-06 1989-01-25 Stelrad Radiatoren & Kessel Brennerbefeuerter heizungskessel
ATE133776T1 (de) * 1988-04-21 1996-02-15 Richard Mueller Niedertemperaturheizkessel
CA2133052A1 (en) * 1994-09-27 1996-03-28 John Quick Seal and installation improvements
US5848586A (en) * 1997-01-06 1998-12-15 Garms; Richard C. Fire safety collar for gas water heaters

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2012161A6 (es) 1988-12-02 1990-03-01 Arana Uriarte Genaro Sistema de calentamiento de agua.
EP0387584A2 (de) 1989-03-11 1990-09-19 Hans Dr. Viessmann Heizgaszugrohr
EP0397586A1 (de) 1989-05-10 1990-11-14 De Dietrich Thermique Kesselglied für Niedertemperatur-Heizkessel
EP0573742A1 (de) 1992-06-06 1993-12-15 INTERDOMO GmbH & CO. Heizungs- und Wärmetechnik Heizkessel für Niedertemperaturheizungen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1369647A2 (de) * 2002-06-04 2003-12-10 Bradford White Corporation Brennwertkessel
EP1369647A3 (de) * 2002-06-04 2005-01-19 Bradford White Corporation Brennwertkessel
US7559293B2 (en) 2002-06-04 2009-07-14 Bradford White Corporation High efficiency water heater
US7900589B2 (en) 2002-06-04 2011-03-08 Bradford White Corporation High efficiency water heater
US8807093B2 (en) 2011-05-19 2014-08-19 Bock Water Heaters, Inc. Water heater with multiple heat exchanging stacks
US10184690B2 (en) 2017-02-09 2019-01-22 Bock Water Heaters, Inc. Condensing water heater and condensation control system
CN113203240A (zh) * 2021-04-27 2021-08-03 太和县大华能源科技有限公司 一种工业循环水系统

Also Published As

Publication number Publication date
EP1008819A3 (de) 2002-09-25
ES2156689B1 (es) 2002-02-01
ES2237230B1 (es) 2007-05-01
ES2156689A1 (es) 2001-07-01
ES2237230A1 (es) 2005-07-16

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