[go: up one dir, main page]

WO2011090368A2 - Heat recuperator - Google Patents

Heat recuperator Download PDF

Info

Publication number
WO2011090368A2
WO2011090368A2 PCT/MX2011/000008 MX2011000008W WO2011090368A2 WO 2011090368 A2 WO2011090368 A2 WO 2011090368A2 MX 2011000008 W MX2011000008 W MX 2011000008W WO 2011090368 A2 WO2011090368 A2 WO 2011090368A2
Authority
WO
WIPO (PCT)
Prior art keywords
duct
walls
nerves
ribs
ducts
Prior art date
Application number
PCT/MX2011/000008
Other languages
Spanish (es)
French (fr)
Other versions
WO2011090368A3 (en
Inventor
Francisco Alvarado Barrientos
Original Assignee
Francisco Alvarado Barrientos
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 Francisco Alvarado Barrientos filed Critical Francisco Alvarado Barrientos
Publication of WO2011090368A2 publication Critical patent/WO2011090368A2/en
Publication of WO2011090368A3 publication Critical patent/WO2011090368A3/en

Links

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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
    • 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
    • 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
    • F28D21/0007—Water heaters
    • 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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
    • 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
    • F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
    • F28D2020/0065—Details, e.g. particular heat storage tanks, auxiliary members within tanks
    • F28D2020/0078—Heat exchanger arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/04—Reinforcing means for conduits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present invention belongs to the field of water heaters and steam boilers of smoke pipes, for commercial and industrial residential use and consists of a heat recuperator that does not require baffles inside; because it can recover the heat of combustion gases, with its walls only.
  • baffles of the aforementioned inventions in addition to the fact that their use implies an additional cost, are ineffective because they are not cooled by any fluid and therefore are always at very high temperature during operation of heaters and boilers; Therefore, although the walls of the smoke pipes remain relatively cold, the combustion gases come out very hot from the pipes, in water heaters and steam boilers.
  • Figure 1 shows as an example the tank of a water heater and inside it you can see two gas pipelines, arc-shaped.
  • Figure 2 individually shows a sectional view of the arc-shaped duct, shown in Figure 1 and a series of protuberances.
  • Figure 3 shows a longitudinal section of the arc-shaped duct, which is proposed here and the profile of the gas duct and a series of protrusions can be seen.
  • Figure 4 shows a view of the section of the pipeline proposed here, which is rectangular in shape and a series of protrusions can be seen.
  • Figure 1 shows as an example, the tank 1 of a water heater, in which the preferred position for arranging two pipelines for gases 2, arc-shaped inside the tank 1, is appreciated; which is not limiting, because more than two arc-shaped ducts 2 can be arranged in the tank 1;
  • the quantity of ducts 2 depends on the diameter of the tank 1 and the power with which the water heater is designed.
  • the ducts 2 of the present figure are preferably arranged opposite each other and between the ends of both ducts 2, there is a gap of at least 20 mm. So that water can flow freely around and in between the two ducts 2 and so the water heating is uniform inside the tank 1.
  • Figure 2 shows a sectional view of the arc-shaped gas duct 2 which is proposed here; which is composed of two walls that face each other and has on its two walls a plurality of protuberances 3, which are formed towards the inside of the duct 2 and when the two walls of the duct 2, face each other, the protuberances 3 of the two walls, they are opposed and making contact with each other, so they function as stiffeners and thus keep the two walls of the duct 2 apart and that the duct 2 can withstand external pressure.
  • the protuberances 3 are formed by means of a die, with the distribution to the tresbolillo, so that they are not aligned consecutively with respect to the longitudinal axis of the duct 2, since that is the direction in which the flue gases flow, as indicated the arrow 4 of figure 3.
  • the distribution to the triplet in the protuberances 3, is required because they also have the function of causing turbulence and recovering the heat of the flue gases, which flow inside the duct 2.
  • the present duct for gases 2 it has the arc shape because it is similar to the shape of the wall of the tank 1 and therefore in a certain tank 1, a certain amount of arc-shaped ducts 2 of different dimensions can be arranged; they are preferably arranged in pairs, as seen in Figure 1 and a pair of ducts 2 remain, in the middle of another pair of larger ducts 2 and can be preferably in a concentric position, although the ducts 2 can be arranged with another distribution in the tank 1.
  • the arrangement of a greater quantity of ducts 2 in the tank 1, increases the area of passage for the flue gases and increases the heating area, with respect to the ducts 2 of rectangular form; This is important because the thickness of the duct 2 is defined by the separation between its two walls, which is limited by the depth that can be reached in the protuberances 3.
  • the protuberances 3 can have a hemispherical shape, a truncated cone, or an irregular shape, because the most important thing is that they are distributed to the tresbolillo and that they are confronted and making contact with each other on the two walls of the duct 2.
  • the present arc-shaped gas duct 2 reaches a preferred tangential angle of 120 ° from one end to the opposite end, which is not limiting, because the arc-shaped duct 2 can have intermediate angles, from 180 ° to 0 o . As can be understood, the duct 2 with 0 or angle, becomes a rectangular duct 2.
  • Figure 3 shows a longitudinal section of the arc-shaped gas duct 2, which is proposed here and the profile of the two walls of the duct 2 is appreciated and a series of protuberances 3 are also seen, which make contact with each other to that function as stiffeners.
  • Figure 4 shows a sectional view of a variant of the gas pipeline 2, which is proposed here; which has a rectangular shape and a series of protuberances 3 are appreciated, which make contact with each other to function as stiffeners.
  • the present rectangular duct 2 also has on its two walls a plurality of protuberances 3, which are formed by a die towards the inside of the duct 2, with the distribution to the three bobbin and when facing the two walls of the duct 2, the bumps 3 function as stiffeners when confronted with each other, as described in figure 2.
  • all the characteristics of the duct 2 and the protuberances 3 described in figure 2 apply exactly the same in the duct 2 of the present figure, except for the arc shape.
  • the protuberances 3 that are shown and described in the present figure and in figures 2 and 3, can be completely replaced by nerves in the two walls of the duct 2, whether the duct 2 has an arc or rectangular shape and a die can be designed that can form the ribs and the protuberances 3, combined in the two walls of the duct 2.
  • the nerves are elongated in shape and are also formed with a die in the two walls towards the inside of the gas duct 2 and in the transverse direction with respect to the longitudinal axis of the duct 2, the nerves are in rows and parallel between yes, in all the rows of the two walls of the duct 2 and in the longitudinal direction, the nerves are interspersed in such a way that each nerve of a particular row starts in the middle of where two nerves of the adjacent rows end longitudinally; which is equivalent to the three-bolt distribution of the bumps 3; said distribution is required so that the fillets of gases flowing inside the duct 2 are cut in half in each row of nerves.
  • the ribs can be formed in a very varied orientation, from the aligned position, up to 90 ° with respect to the longitudinal axis of the duct 2; but a preferred angle of 30 ° is proposed relative to the longitudinal axis of the duct 2, for example; if we have the two walls of the duct 2 facing each other, the nerves of a wall, are turned 30 ° against the hands of the clock and the nerves of the opposite wall, are turned 30 ° in favor of the hands of the clock and thus a V is formed in each nerve when it is confronted with the corresponding nerve in the opposite wall.
  • the nerves can have an equal orientation in the two walls of the duct 2, for example; if we have the two walls of the duct 2 facing each other, the nerves of the two walls are turned 30 ° in favor of the hands of the clock, so the nerves of both walls face each other aligned.
  • the nerves of one row may be rotated 30 ° in favor of the clock hands and the nerves of the next row longitudinally, may be rotated 30 ° against the clock hands and so on for the following rows of nerves
  • the nerves of the two walls make contact when confronted with each other to function as stiffeners and keep the two walls of the duct 2 apart so that the
  • duct 2 can withstand external pressure.
  • the walls of the gas ducts 2, which are described in Figures 2, 3 and 4, have two longitudinal tabs on both opposite sides of each wall and when the two walls of each duct 2 face each other, the tabs both walls are welded together to form the duct 2, whether it has an arc or rectangular shape.
  • the heater tank has a diameter of 260 mm; the height is 280 mm and it contains two ducts for gases 2, with an arc shape, which are opposed to each other and at the ends of the ducts 2, there is a separation of 30 mm between both ducts 2, so that the water can flow freely around and in the middle of the ducts 2.
  • Each duct 2 has on its two walls a plurality of nerves, which are formed inside the duct 2. The nerves have such a distribution, that when remaining facing the two walls of the duct 2, the nerves of each wall form a V when confronted with the nerves of the opposite wall.
  • the duct 2 has a tangential width of 200 mm and the internal thickness through which the flue gases flow is 25 mm. With these dimensions and operating with natural draft, the two ducts 2 allow a burner with 14 kw of power at sea level and the present heater continuously produces 6.8 Its / m of water, with an increase of 25 ° C in temperature of the water and reaches a thermal efficiency of 85% based on the lower calorific value of the combustible gas.
  • the present gas duct 2 can be applied in water heaters and steam boilers of any capacity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to a heat recuperator consisting of a gas duct that is a heat recuperator and can be used in water heaters and steam boilers, with natural draft and forced draft. The gas duct is in the form of a 120° arc and consists of two walls that face each other and have a plurality of inwardly raised ribs formed by means of a punch and distributed such that, when the two walls face each other, the ribs of one wall form a V shape when they face and come into contact with the ribs of the opposite wall, and in this way, the ribs function as stiffeners, so that the duct resists external pressure. Said gas duct can have a plurality of projections in its two walls, instead of ribs, or can have a combination of ribs and projections. Furthermore, the duct can have an intermediate angle, from 180° to 0°, corresponding to a rectangular gas duct when it has an angle of 0°.

Description

RECUPERADOR DE CALOR  HEAT RECOVERY

CAMPO DE LA INVENCIÓN  FIELD OF THE INVENTION

La presente invención pertenece al ámbito de los calentadores de agua y las ¡ calderas de vapor de tubos de humo, para uso residencial comercial e industrial y consiste en un recuperador de calor que no requiere baffles en su interior; porque puede recuperar el calor de los gases de combustión, con sus paredes únicamente. The present invention belongs to the field of water heaters and steam boilers of smoke pipes, for commercial and industrial residential use and consists of a heat recuperator that does not require baffles inside; because it can recover the heat of combustion gases, with its walls only.

ANTECEDENTES DE LA INVENCIÓN BACKGROUND OF THE INVENTION

Actualmente en los calentadores de agua y en las calderas de vapor de tubos de humo, se utilizan diversos baffles fabricados con lámina, para recuperar el calor de los gases de combustión en el interior de los tubos de humo y aun así no seAt the moment in the water heaters and in the steam boilers of smoke pipes, various baffles made of foil are used, to recover the heat of the flue gases inside the smoke pipes and even so

> alcanza la eficiencia térmica que se requiere en los calentadores y calderas de la actualidad; un ejemplo de los baffles que más se usan actualmente en el interior de los tubos de humo, son los siguientes: El que se describe en la patente No 5,787,846 de los EE.UU. Otro ejemplo es el que se describe en la patente No 5, 544,625 de los EE.UU. Un ejemplo más aún, es el que se describe en la patente i No 4, 327,671 también de los EE.UU. Los baffles de las invenciones ya mencionadas, además de que su uso implica un costo adicional, son ineficaces porque no están enfriados por ningún fluido y por ello siempre se encuentran a muy alta temperatura durante el funcionamiento de los calentadores y calderas; por lo cual aunque las paredes de los tubos de humo se mantengan relativamente frías, los gases de combustión salen muy calientes de los tubos, en los calentadores de agua y las calderas de vapor. > reaches the thermal efficiency required in today's heaters and boilers; An example of the baffles that are most commonly used inside smoke pipes are the following: The one described in US Patent No. 5,787,846. Another example is that described in US Patent No. 5, 544,625. A further example is that described in US Pat. No. 4,327,671 also of the United States. The baffles of the aforementioned inventions, in addition to the fact that their use implies an additional cost, are ineffective because they are not cooled by any fluid and therefore are always at very high temperature during operation of heaters and boilers; Therefore, although the walls of the smoke pipes remain relatively cold, the combustion gases come out very hot from the pipes, in water heaters and steam boilers.

Es por tanto un objeto de la presente invención, el de proporcionar un recuperador de calor que está constituido por un ducto para gases, que no requiere baffles en su interior, porque puede recuperar el calor únicamente con sus paredes y es fácil de fabricar. It is therefore an object of the present invention, to provide a heat recuperator that is constituted by a gas duct, which does not require baffles inside, because it can recover heat only with its walls and is easy to manufacture.

Es un objeto más de la presente invención, el de proporcionar un ducto para gases, que permite alcanzar una alta eficiencia térmica a bajo costo, porque toda la superficie que está en contacto con los gases calientes de combustión, es enfriada por el agua que contiene el calentador o caldera; por lo cual se requiere menos superficie de calefacción y menos costo en relación a los tubos de humo que sí requieren baffles en su interior. It is a further object of the present invention, to provide a gas duct, which allows to achieve high thermal efficiency at low cost, because the entire surface that is in contact with the hot combustion gases, is cooled by the water it contains. the heater or boiler; therefore, less heating surface and less cost are required in relation to smoke pipes that do require baffles inside.

BREVE DESCRIPCIÓN DE LAS FIGURAS BRIEF DESCRIPTION OF THE FIGURES

La figura 1 muestra como ejemplo el tanque de un calentador de agua y en su interior se puede apreciar dos ductos para gases, con forma de arco. Figure 1 shows as an example the tank of a water heater and inside it you can see two gas pipelines, arc-shaped.

La figura 2 muestra individualmente una vista seccional del ducto con forma de arco, que se muestra en la figura 1 y se aprecia una serie de protuberancias. La figura 3 muestra un corte longitudinal del ducto con forma de arco, que aquí se propone y se aprecia el perfil del ducto para gases y una serie de protuberancias. Figure 2 individually shows a sectional view of the arc-shaped duct, shown in Figure 1 and a series of protuberances. Figure 3 shows a longitudinal section of the arc-shaped duct, which is proposed here and the profile of the gas duct and a series of protrusions can be seen.

La figura 4 muestra una vista de la sección del ducto que aquí se propone, el cual es de forma rectangular y se aprecia una serie de protuberancias. Figure 4 shows a view of the section of the pipeline proposed here, which is rectangular in shape and a series of protrusions can be seen.

DESCRIPCIÓN DETALLADA DE LA INVENCIÓN DETAILED DESCRIPTION OF THE INVENTION

La presente descripción se hace con fines ilustrativos, no limitativos y se hace referencia a las figuras y a los signos numéricos que se acompañan. The present description is made for illustrative, non-limiting purposes and reference is made to the accompanying figures and numerical signs.

La figura 1 muestra como ejemplo, el tanque 1 de un calentador de agua, en el cual se aprecia la posición preferida para disponer dos ductos para gases 2, con forma de arco en el interior del tanque 1 ; lo cual no es limitativo, porque se pueden disponer más de dos ductos 2 con forma de arco en el tanque 1 ; la cantidad de ductos 2, depende del diámetro que tenga el tanque 1 y de la potencia con la que sea diseñado el calentador de agua. Los ductos 2 de la presente figura, se disponen preferentemente contrapuestos entre sí y entre los extremos de ambos ducto 2, queda una separación de al menos 20 mm. Para que el agua pueda fluir libremente alrededor y en medio de los dos ductos 2 y así el calentamiento del agua es uniforme en el interior del tanque 1. Figure 1 shows as an example, the tank 1 of a water heater, in which the preferred position for arranging two pipelines for gases 2, arc-shaped inside the tank 1, is appreciated; which is not limiting, because more than two arc-shaped ducts 2 can be arranged in the tank 1; The quantity of ducts 2 depends on the diameter of the tank 1 and the power with which the water heater is designed. The ducts 2 of the present figure are preferably arranged opposite each other and between the ends of both ducts 2, there is a gap of at least 20 mm. So that water can flow freely around and in between the two ducts 2 and so the water heating is uniform inside the tank 1.

La figura 2 muestra una vista seccional del ducto para gases 2, con forma de arco que aquí se propone; el cual está compuesto por dos paredes que quedan enfrentadas entre sí y presenta en sus dos paredes una pluralidad de protuberancias 3, que están formadas hacia el interior del ducto 2 y cuando las dos paredes del ducto 2, quedan enfrentadas entre sí, las protuberancias 3 de las dos paredes, quedan contrapuestas y haciendo contacto entre sí, por lo cual funcionan como atiesadores y así se mantienen separadas las dos paredes del ducto 2 y que el ducto 2 pueda resistir la presión externa. Las protuberancias 3 se forman por medio de un troquel, con la distribución al tresbolillo, para que no queden alineadas de forma consecutiva respecto al eje longitudinal del ducto 2, ya que esa es la dirección en que fluyen los gases de combustión, como lo indica la flecha 4 de la figura 3. La distribución al tresbolillo en las protuberancias 3, se requiere porque éstas también tienen la función de provocar turbulencias y recuperar el calor de los gases de combustión, que fluyen en el interior del ducto 2. El presente ducto para gases 2, tiene la forma de arco porque ésta es similar a la forma que tiene la pared del tanque 1 y por ello en un determinado tanque 1 , se pueden disponer una cierta cantidad de ductos 2 con forma de arco, de diferentes dimensiones; se disponen preferentemente en pares, como se aprecia en la figura 1 y queda un par de ductos 2, en medio de otro par de ductos 2 de mayor tamaño y pueden quedar en posición preferentemente concéntrica, aunque los ductos 2 pueden disponerse con otra distribución en el tanque 1. La disposición de una mayor cantidad de ductos 2 en el tanque 1 , incrementa el área de paso para los gases de combustión y aumenta el área de calefacción, respecto a los ductos 2 de forma rectangular; esto es importante porque el espesor del ducto 2 está definido por la separación entre sus dos paredes, lo cual está limitado por la profundidad que se puede alcanzar en las protuberancias 3. Las protuberancias 3 pueden tener forma semiesférica, de cono truncado, o forma irregular, porque lo más importante es que queden distribuidas al tresbolillo y que queden confrontadas y haciendo contacto entre sí en las dos paredes del ducto 2. El presente ducto para gases 2 con forma de arco, alcanza un ángulo tangencial preferido de 120° desde un extremo hasta el extremo opuesto, lo cual no es limitativo, porque el ducto 2 con forma de arco, puede tener ángulos intermedios, desde 180° hasta 0o. Como se puede entender, el ducto 2 con 0o de ángulo, se convierte en un ducto 2 de forma rectangular. Figure 2 shows a sectional view of the arc-shaped gas duct 2 which is proposed here; which is composed of two walls that face each other and has on its two walls a plurality of protuberances 3, which are formed towards the inside of the duct 2 and when the two walls of the duct 2, face each other, the protuberances 3 of the two walls, they are opposed and making contact with each other, so they function as stiffeners and thus keep the two walls of the duct 2 apart and that the duct 2 can withstand external pressure. The protuberances 3 are formed by means of a die, with the distribution to the tresbolillo, so that they are not aligned consecutively with respect to the longitudinal axis of the duct 2, since that is the direction in which the flue gases flow, as indicated the arrow 4 of figure 3. The distribution to the triplet in the protuberances 3, is required because they also have the function of causing turbulence and recovering the heat of the flue gases, which flow inside the duct 2. The present duct for gases 2, it has the arc shape because it is similar to the shape of the wall of the tank 1 and therefore in a certain tank 1, a certain amount of arc-shaped ducts 2 of different dimensions can be arranged; they are preferably arranged in pairs, as seen in Figure 1 and a pair of ducts 2 remain, in the middle of another pair of larger ducts 2 and can be preferably in a concentric position, although the ducts 2 can be arranged with another distribution in the tank 1. The arrangement of a greater quantity of ducts 2 in the tank 1, increases the area of passage for the flue gases and increases the heating area, with respect to the ducts 2 of rectangular form; This is important because the thickness of the duct 2 is defined by the separation between its two walls, which is limited by the depth that can be reached in the protuberances 3. The protuberances 3 can have a hemispherical shape, a truncated cone, or an irregular shape, because the most important thing is that they are distributed to the tresbolillo and that they are confronted and making contact with each other on the two walls of the duct 2. The present arc-shaped gas duct 2 reaches a preferred tangential angle of 120 ° from one end to the opposite end, which is not limiting, because the arc-shaped duct 2 can have intermediate angles, from 180 ° to 0 o . As can be understood, the duct 2 with 0 or angle, becomes a rectangular duct 2.

La figura 3 muestra un corte longitudinal del ducto para gases 2 con forma de arco, que aquí se propone y se aprecia el perfil de las dos paredes del ducto 2 y se aprecia también una serie de protuberancias 3, las cuales hacen contacto entre sí para que funcionen como atiesadores. Figure 3 shows a longitudinal section of the arc-shaped gas duct 2, which is proposed here and the profile of the two walls of the duct 2 is appreciated and a series of protuberances 3 are also seen, which make contact with each other to that function as stiffeners.

La figura 4 muestra una vista seccional de una variante del ducto para gases 2, que aquí se propone; el cual tiene forma rectangular y se aprecia una serie de protuberancias 3, las cuales hacen contacto entre sí para funcionar como atiesadores. El presente ducto 2 de forma rectangular, también presenta en sus dos paredes una pluralidad de protuberancias 3, las cuales son formadas por un troquel hacia el interior del ducto 2, con la distribución al tres bolillo y al quedar enfrentadas entre sí las dos paredes del ducto 2, las protuberancias 3 funcionan como atiesadores cuando quedan confrontadas entre sí, tal y como se describ en la figura 2. Además, todas las características del ducto 2 y de las protuberancias 3 que se describen en la figura 2, se aplican exactamente igual en el ducto 2 de la presente figura, excepto la forma de arco. Las protuberancias 3 que se muestran y describen en la presente figura y en las figuras 2 y 3, pueden ser sustituidas en su totalidad por nervios en las dos paredes del ducto 2, ya sea que el ducto 2 tenga forma de arco o forma rectangular y se puede diseñar un troquel que pueda formar los nervios y las protuberancias 3, combinados en las dos paredes del ducto 2. Figure 4 shows a sectional view of a variant of the gas pipeline 2, which is proposed here; which has a rectangular shape and a series of protuberances 3 are appreciated, which make contact with each other to function as stiffeners. The present rectangular duct 2, also has on its two walls a plurality of protuberances 3, which are formed by a die towards the inside of the duct 2, with the distribution to the three bobbin and when facing the two walls of the duct 2, the bumps 3 function as stiffeners when confronted with each other, as described in figure 2. In addition, all the characteristics of the duct 2 and the protuberances 3 described in figure 2, apply exactly the same in the duct 2 of the present figure, except for the arc shape. The protuberances 3 that are shown and described in the present figure and in figures 2 and 3, can be completely replaced by nerves in the two walls of the duct 2, whether the duct 2 has an arc or rectangular shape and a die can be designed that can form the ribs and the protuberances 3, combined in the two walls of the duct 2.

Como ya es sabido, los nervios tienen forma alargada y también son formados con un troquel en las dos paredes hacia el interior del ducto para gases 2 y en la dirección transversal respecto al eje longitudinal del ducto 2, los nervios quedan en hileras y paralelos entre sí en todas las hileras de las dos paredes del ducto 2 y en dirección longitudinal, los nervios quedan intercalados de tal forma, que cada nervio de una hilera determinada, inicia en medio de donde terminan dos nervios de las hileras adyacentes longitudinalmente; lo cual es equivalente a la distribución al tres bolillo de las protuberancias 3; dicha distribución se requiere para que los filetes de gases que fluyen en el interior del ducto 2, sean cortados por la mitad en cada hilera de nervios. Además, en dirección del eje longitudinal del ducto 2, los nervios se pueden formar con una orientación muy variada, desde la posición alineada, hasta 90° respecto al eje longitudinal del ducto 2; pero se propone un ángulo preferido de 30° respecto al eje longitudinal del ducto 2, por ejemplo; si tenemos las dos paredes del ducto 2 enfrentadas entre sí, los nervios de una pared, quedan girados 30° en contra de las manecillas del reloj y los nervios de la pared de enfrente, quedan girados 30° a favor de las manecillas del reloj y así se forma una V en cada nervio cuando éste se confronta con el nervio correspondiente de la pared de enfrente. Opcionalmente los nervios pueden tener una orientación igual en las dos paredes del ducto 2, por ejemplo; si tenemos las dos paredes del ducto 2 enfrentadas entre sí, los nervios de las dos paredes quedan girados 30° a favor de las manecillas del reloj, así los nervios de ambas paredes se confrontan alineados entre sí. Además, los nervios de una hilera pueden estar girados 30° a favor de las manecillas del reloj y los nervios de la siguiente hilera longitudinalmente, pueden estar girados 30° en contra de las i manecillas del reloj y así sucesivamente para las siguientes hileras de nervios en las dos paredes del ducto 2 y de esta forma, queda un trayecto sinuoso para los gases de combustión que fluyen por el interior del ducto para gases 2. Los nervios de las dos paredes, hacen contacto al quedar confrontados entre sí para funcionar como atiesadores y mantienen separadas las dos paredes del ducto 2 para que elAs is already known, the nerves are elongated in shape and are also formed with a die in the two walls towards the inside of the gas duct 2 and in the transverse direction with respect to the longitudinal axis of the duct 2, the nerves are in rows and parallel between yes, in all the rows of the two walls of the duct 2 and in the longitudinal direction, the nerves are interspersed in such a way that each nerve of a particular row starts in the middle of where two nerves of the adjacent rows end longitudinally; which is equivalent to the three-bolt distribution of the bumps 3; said distribution is required so that the fillets of gases flowing inside the duct 2 are cut in half in each row of nerves. Furthermore, in the direction of the longitudinal axis of the duct 2, the ribs can be formed in a very varied orientation, from the aligned position, up to 90 ° with respect to the longitudinal axis of the duct 2; but a preferred angle of 30 ° is proposed relative to the longitudinal axis of the duct 2, for example; if we have the two walls of the duct 2 facing each other, the nerves of a wall, are turned 30 ° against the hands of the clock and the nerves of the opposite wall, are turned 30 ° in favor of the hands of the clock and thus a V is formed in each nerve when it is confronted with the corresponding nerve in the opposite wall. Optionally the nerves can have an equal orientation in the two walls of the duct 2, for example; if we have the two walls of the duct 2 facing each other, the nerves of the two walls are turned 30 ° in favor of the hands of the clock, so the nerves of both walls face each other aligned. In addition, the nerves of one row may be rotated 30 ° in favor of the clock hands and the nerves of the next row longitudinally, may be rotated 30 ° against the clock hands and so on for the following rows of nerves In the two walls of the duct 2 and in this way, there is a winding path for the flue gases that flow through the interior of the duct for gases 2. The nerves of the two walls make contact when confronted with each other to function as stiffeners and keep the two walls of the duct 2 apart so that the

; ducto 2 pueda resistir le presión externa. ; duct 2 can withstand external pressure.

Las paredes de los ductos para gases 2, que se describen en las figuras 2, 3 y 4, cuentan con dos pestañas longitudinales en ambos lados opuestos de cada pared y cuando las dos paredes de cada ducto 2, quedan enfrentadas entre sí, las pestañas de ambas paredes se sueldan entre sí, para formar el ducto 2, ya sea que éste tenga forma de arco o forma rectangular. The walls of the gas ducts 2, which are described in Figures 2, 3 and 4, have two longitudinal tabs on both opposite sides of each wall and when the two walls of each duct 2 face each other, the tabs both walls are welded together to form the duct 2, whether it has an arc or rectangular shape.

El ducto para gases 2 que se describe en las figuras 2, 3 y 4, ya sea que presente en sus dos paredes una pluralidad de protuberancias 3, o una pluralidad de nervios, o una combinación de ambos; como sea, puede funcionar con tiro natural y con tiro forzado; cuando el ducto 2 funciona con tiro natural, las protuberancias 3 y o los nervios, tienen que formarse lo más pronunciados que permita la elasticidad de la lámina, para que las paredes del ducto 2, queden suficientemente separadas entre sí, porque los gases de combustión fluyen a baja velocidad y se requiere una mayor área de paso para los mismos; pero si el presente ducto 2, funciona con tiro forzado, las protuberancias 3 y o los nervios, pueden formarse poco pronunciados y las dos paredes del ducto 2, pueden quedar muy cercanas entre sí; porque en este caso, los gases de combustión fluyen a alta velocidad porque son impulsados por un soplador mecánico. Además, en los calentadores y calderas de funcionamiento vertical y que funcionan con tiro forzado, los gases de combustión pueden fluir en dirección ascendente, o en dirección descendente por el interior del ducto para gases 2. The gas duct 2 described in Figures 2, 3 and 4, whether it has on its two walls a plurality of protuberances 3, or a plurality of nerves, or a combination of both; however, it can work with natural shooting and forced shooting; when the duct 2 works with natural draft, the protuberances 3 and the nerves, have to be formed as pronounced as the elasticity of the sheet allows, so that the walls of the duct 2, are sufficiently separated from each other, because the flue gases flow at low speed and a larger passage area is required for them; but if the present duct 2, works with forced draft, the protuberances 3 and the nerves, can be formed little pronounced and the two walls of the duct 2, can be very close to each other; because in this case, the flue gases flow at high speed because they are driven by a mechanical blower. In addition, in heaters and boilers that operate vertically and operate with forced draft, combustion gases can flow in the upward direction, or in the downward direction through the interior of the gas duct 2.

REALIZACIÓN PREFERIDA DE LA INVENCIÓN PREFERRED EMBODIMENT OF THE INVENTION

Se proporciona como ejemplo un calentador de agua de rápida recuperación, en el cual se aplica la presente invención. El tanque del calentador tiene un diámetro de 260 mm; la altura es de 280 mm y contiene dos ductos para gases 2, con i forma de arco, los cuales quedan contrapuestos entre sí y en los extremos de los ductos 2, existe una separación de 30 mm entre ambos ductos 2, para que el agua pueda fluir libremente alrededor y en medio de los ductos 2. Cada ducto 2 presenta en sus dos paredes una pluralidad de nervios, que están formados hacia el interior del ducto 2. Los nervios tienen una distribución tal, que al quedar enfrentadas las dos paredes del ducto 2, los nervios de cada pared forman una V al confrontarse con los nervios de la pared de enfrente. El ducto 2 tiene un ancho tangencial de 200 mm y el espesor interior por donde fluyen los gases de combustión, es de 25 mm. Con dichas dimensiones y funcionando con tiro natural, los dos ductos 2 permiten un quemador con 14 kw de potencia a nivel del mar y el presente calentador produce de forma continua 6.8 Its /m de agua, con un incremento de 25 °C en la temperatura del agua y alcanza una eficiencia térmica de 85 % en base al poder calorífico inferior del gas combustible. An example of a rapid recovery water heater is provided, in which the present invention is applied. The heater tank has a diameter of 260 mm; the height is 280 mm and it contains two ducts for gases 2, with an arc shape, which are opposed to each other and at the ends of the ducts 2, there is a separation of 30 mm between both ducts 2, so that the water can flow freely around and in the middle of the ducts 2. Each duct 2 has on its two walls a plurality of nerves, which are formed inside the duct 2. The nerves have such a distribution, that when remaining facing the two walls of the duct 2, the nerves of each wall form a V when confronted with the nerves of the opposite wall. The duct 2 has a tangential width of 200 mm and the internal thickness through which the flue gases flow is 25 mm. With these dimensions and operating with natural draft, the two ducts 2 allow a burner with 14 kw of power at sea level and the present heater continuously produces 6.8 Its / m of water, with an increase of 25 ° C in temperature of the water and reaches a thermal efficiency of 85% based on the lower calorific value of the combustible gas.

i El presente ducto para gases 2, puede aplicarse en calentadores de agua y en calderas de vapor de cualquier capacidad. i The present gas duct 2 can be applied in water heaters and steam boilers of any capacity.

Claims

REIVINDICACIONES Habiendo descrito suficientemente mi invención, la considero una novedad, por lo tanto reclamo de mi exclusiva propiedad el contenido de las siguientes cláusulas. CLAIMS Having sufficiently described my invention, I consider it a novelty, therefore I claim the exclusive ownership of the content of the following clauses. 1. Recuperador de calor, que sustituye a los tubos de humo que actualmente se utilizan para recuperar el calor de los gases de combustión, en los calentadores de agua y las calderas de vapor de funcionamiento vertical, que corresponden a los que funcionan con tiro natural y con tiro forzado y cuando los calentadores y calderas funcionan con tiro forzado, los gases de combustión pueden fluir en dirección ascendente o en dirección descendente, porque son impulsados por un soplador mecánico; caracterizado porque el tanque (1) del calentador de agua contiene al menos dos ductos de gases (2) con forma de arco, que alcanzan un ángulo de 120°; además porque los ductos (2) quedan confrontados entre sí y en los extremos de los dos ductos (2), existe una separación de al menos 20 mm entre ambos ductos 2; además porque cada ducto para gases (2) está constituido por dos paredes que quedan enfrentadas entre sí; además porque las dos paredes del ducto (2), presentan una pluralidad de nervios que están formados hacia el interior del ducto (2); además porque los nervios son formados en las dos paredes del ducto (2) por medio de un troquel; además porque todos los nervios de una pared, se forman girados 30° en contra de las manecillas del reloj y todos los nervios de la otra pared se forman girados 30° a favor de las manecillas del reloj; además porque al quedar enfrentadas las dos paredes del ducto (2), los nervios de cada pared forman una V al confrontarse con los nervios correspondientes de la pared de enfrente; además porque los nervios de las dos paredes, al quedar confrontados hacen contacto entre sí y funcionan como atiesadores para que el ducto (2) resista la presión externa; además porque cada pared del ducto (2) cuenta con una pestaña longitudinal en cada lado y las pestañas de las dos paredes se sueldan entre sí para formar el ducto para gases (2). 1. Heat recuperator, which replaces the smoke pipes that are currently used to recover heat from flue gases, in water heaters and steam boilers of vertical operation, which correspond to those that operate with natural draft and with forced draft and when heaters and boilers operate with forced draft, combustion gases can flow in the upward or downward direction, because they are driven by a mechanical blower; characterized in that the tank (1) of the water heater contains at least two arc-shaped gas ducts (2), which reach an angle of 120 °; also because the ducts (2) are confronted with each other and at the ends of the two ducts (2), there is a separation of at least 20 mm between the two ducts 2; also because each gas pipe (2) consists of two walls that face each other; also because the two walls of the duct (2), have a plurality of nerves that are formed towards the inside of the duct (2); also because the nerves are formed in the two walls of the duct (2) by means of a die; also because all the nerves of one wall are formed rotated 30 ° against the hands of the clock and all the nerves of the other wall are formed rotated 30 ° in favor of the hands of the clock; also because when facing the two walls of the duct (2), the nerves of each wall form a V when confronted with the nerves corresponding from the opposite wall; also because the nerves of the two walls, when confronted make contact with each other and function as stiffeners so that the duct (2) resists external pressure; also because each duct wall (2) has a longitudinal flange on each side and the tabs of the two walls are welded together to form the gas duct (2). 2. Recuperador de calor, de conformidad con la reivindicación 1 , caracterizado porque los nervios quedan en hileras y paralelos entre sí en la dirección transversal respecto al eje longitudinal del ducto (2) y en la dirección longitudinal los nervios quedan intercalados de tal forma, que cada nervio de una determinada hilera, inicia en medio de donde terminan dos nervios de las hileras adyacentes longitudinalmente. 2. Heat recuperator according to claim 1, characterized in that the ribs are in rows and parallel to each other in the transverse direction with respect to the longitudinal axis of the duct (2) and in the longitudinal direction the nerves are intercalated in such a way, that each nerve of a given row starts in the middle of where two nerves of the longitudinally adjacent rows end. 3. Recuperador de calor, de conformidad con la reivindicación 1 , caracterizado porque opcionalmente las dos paredes del ducto (2) presentan una pluralidad de protuberancias (3) en lugar de nervios. 3. Heat recuperator, according to claim 1, characterized in that the two duct walls (2) optionally have a plurality of protuberances (3) instead of ribs. 4. Recuperador de calor, de conformidad con la reivindicación 1 , caracterizado porque opcionalmente las dos paredes del ducto (2), presentan una pluralidad combinada de nervios y de protuberancias (3). 4. Heat recuperator according to claim 1, characterized in that the two duct walls (2) optionally have a combined plurality of ribs and protuberances (3). 5. Recuperador de calor, de conformidad con la reivindicación 1 , caracterizado porque el ducto (2) puede tener un ángulo intermedio, desde la forma de arco con un ángulo de 180°, hasta la forma rectangular que tiene un ángulo de 0°. 5. Heat recuperator according to claim 1, characterized in that the duct (2) can have an intermediate angle, from the arc shape with an angle of 180 °, to the rectangular shape that has an angle of 0 °. 6. Recuperador de calor, de conformidad con las reivindicaciones 1 y 3, caracterizado porque los nervios tienen forma alargada y las protuberancias (3) pueden tener forma semiesférica, de cono truncado y forma irregular. 6. Heat recuperator, according to claims 1 and 3, characterized in that the ribs have an elongated shape and the protuberances (3) can have a hemispherical shape, a truncated cone and an irregular shape.
PCT/MX2011/000008 2010-01-25 2011-01-17 Heat recuperator WO2011090368A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MXMX/U/2010000023 2010-01-25
MX2010000023 2010-01-25

Publications (2)

Publication Number Publication Date
WO2011090368A2 true WO2011090368A2 (en) 2011-07-28
WO2011090368A3 WO2011090368A3 (en) 2011-11-24

Family

ID=44307438

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2011/000008 WO2011090368A2 (en) 2010-01-25 2011-01-17 Heat recuperator

Country Status (1)

Country Link
WO (1) WO2011090368A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020235984A1 (en) * 2019-05-20 2020-11-26 Francisco Alvarado Barrientos High-efficiency heat exchanger

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4396058A (en) * 1981-11-23 1983-08-02 The Air Preheater Company Heat transfer element assembly
EP0123995A1 (en) * 1983-04-27 1984-11-07 Etablissement Agura Condensing boiler with a spirally coiled heat exchanger part
EP0123994A1 (en) * 1983-04-28 1984-11-07 Etablissement Agura Condensing boiler with a zig-zag heat exchanger part
DE8903155U1 (en) * 1989-03-14 1990-11-29 PC Patentconsult AG, Zug boiler
US6516871B1 (en) * 1999-08-18 2003-02-11 Alstom (Switzerland) Ltd. Heat transfer element assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020235984A1 (en) * 2019-05-20 2020-11-26 Francisco Alvarado Barrientos High-efficiency heat exchanger

Also Published As

Publication number Publication date
WO2011090368A3 (en) 2011-11-24

Similar Documents

Publication Publication Date Title
ES2470670T3 (en) Heat transfer sheet for rotary regenerative heat exchanger
ES2677706T3 (en) Heat exchanger for condensing boiler
ES2875794T3 (en) Gas water heater and burner units using the same
US10036570B2 (en) Heat transfer baffle arrangement for fuel-burning water heater
CN105793653B (en) heat exchanger for heating boiler
ES2914067T3 (en) Corrosion resistant air preheater with jacketed tubes
CN105004052A (en) Water tube type vacuum boiler with central reverse flames
ES2746928T3 (en) Set of heat exchanger tubes
WO2011090368A2 (en) Heat recuperator
ES2612012T3 (en) Pipe in a boiler with smoke pipe
ES2927509T3 (en) Heat transfer elements for rotary heat exchangers
ES2642289T3 (en) Boiler
CN201141587Y (en) Oxirane special heating stove for waste gas burning and warming vapour
ES2435615B1 (en) SMOKE AND GAS EVACUATION TUBE FOR STOVES, BOILERS AND FIREPLACES, WITH THE USE OF RESIDUAL HEAT RELEASED IN THE COMBUSTION
WO2006046846A1 (en) Liquid heater and steam boiler
RU90174U1 (en) WATER BOILER
ES1075003U (en) Heat exchanger
WO2020235984A1 (en) High-efficiency heat exchanger
ES2796179T3 (en) Flame tube of a condensing heat exchanger
CN106225242B (en) Double-hearth heat-conducting oil boiler
ES2676873B1 (en) Boiler with combustion hearth with double heat exchange surface
TW201610376A (en) Gas water heater and heat exchanger thereof
ES2611304T3 (en) A steam boiler comprising a radiation element
RU2008148089A (en) HEATING BOILER CAMERA OF HEATER INSTALLATION
ES2396648B1 (en) WATER PRE-HEATING DEVICE IN COMBUSTION BOILERS.

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11734917

Country of ref document: EP

Kind code of ref document: A2