ITMI20090404A1 - TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR. - Google Patents

TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR. Download PDF

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Publication number
ITMI20090404A1
ITMI20090404A1 IT000404A ITMI20090404A ITMI20090404A1 IT MI20090404 A1 ITMI20090404 A1 IT MI20090404A1 IT 000404 A IT000404 A IT 000404A IT MI20090404 A ITMI20090404 A IT MI20090404A IT MI20090404 A1 ITMI20090404 A1 IT MI20090404A1
Authority
IT
Italy
Prior art keywords
fins
fumes
heat exchange
production
hot water
Prior art date
Application number
IT000404A
Other languages
Italian (it)
Inventor
Giovanni Jahier
Original Assignee
Unical Ag Spa
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 Unical Ag Spa filed Critical Unical Ag Spa
Priority to ITMI2009A000404A priority Critical patent/IT1393254B1/en
Priority to PCT/EP2010/052724 priority patent/WO2010105911A1/en
Priority to EP10708516A priority patent/EP2409105A1/en
Publication of ITMI20090404A1 publication Critical patent/ITMI20090404A1/en
Application granted granted Critical
Publication of IT1393254B1 publication Critical patent/IT1393254B1/en

Links

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
    • F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0024—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for combustion apparatus, e.g. for boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/04—Assemblies of fins having different features, e.g. with different fin densities

Description

TUBO DI CONVOGLIAMENTO DI FUMI IN APPARECCHI DI SCAMBIO TERMICO, IN PARTICOLARE CALDAIE PER LA PRODUZIONE FUMES CONVEYING PIPE IN HEAT EXCHANGE EQUIPMENT, IN PARTICULAR BOILERS FOR PRODUCTION

DI ACQUA CALDA O DI VAPOR D'ACQUA. OF HOT WATER OR WATER VAPOR.

DESCRIZIONE DESCRIPTION

Il trovato si riferisce ad un tubo di convogliamento di fumi in apparecchi di scambio termico, in particolare caldaie per la produzione di acqua calda o di vapor d'acqua. -E' nota la presenza di apparecchi di scambio termico che prevedono la presenza di tubi destinati al convogliamento di fumi prodotti dalla combustione in appositi focolari, inseriti nell'ambito di una capacità contenente il fluido da riscaldare. -Molti tipi di tubi compresi nella tecnica nota sono dotati al proprio interno di alette variamente conformate in contatto con la parete dei tubi stessi, e si realizza in tal modo una elevata trasmissione di calore dai fumi al fluido da riscaldare perché le alette captano calore dai fumi nella zona centrale ove essi sono più caldi e lo trasmettono alla parete dei tubi che appunto à ̈ lambita dal fluido da riscaldare in corrispondenza della superficie esterna. -Esistono apparecchi di scambio termico, come ad esempio certi tipi dì caldaie per la produzione di acqua calda, ovvero le caldaie per la produzione di vapor d'acqua, nei quali i tubi di convogliamento dei fumi si trovano a lavorare in condizioni di temperature elevate, con il conseguente insorgere di problematiche legate alla resistenza dei materiali, ed à ̈ allora compito del presente trovato quello di proporre un tubo di convogliamento di fumi che sia in grado di assicurare, oltre ad elevate caratteristiche di scambio termico, anche la garanzia assoluta di operare in condizioni di sicurezza. -Il compito proposto viene raggiunto da un tubo di convogliamento di fumi in apparecchio di scambio termico, in particolare caldaia per la produzione di vapor d'acqua, secondo il trovato, comprendente al proprio interno alette in contatto con la parete del tubo stesso, caratterizzato dal fatto che le alette situate in prossimità dell'estremità di ingresso dei fumi sono realizzate in acciaio, mentre le alette situate in prossimità dell'estremità di uscita dei fumi sono realizzate in alluminio. -Ulteriori caratteristiche e vantaggi risulteranno maggiormente dalla descrizione di due forme di esecuzione preferite ma non esclusive del trovato, illustrate a titolo indicativo e non limitativo negli uniti disegni in cui: The invention relates to a pipe for conveying fumes to heat exchange apparatus, in particular boilers for the production of hot water or steam. -The presence of heat exchange devices is known which foresee the presence of pipes intended for conveying the fumes produced by combustion in special fireboxes, inserted within a capacity containing the fluid to be heated. -Many types of pipes included in the known art are provided internally with variously shaped fins in contact with the wall of the pipes themselves, and in this way a high heat transmission from the fumes to the fluid to be heated is achieved because the fins capture heat from the fumes in the central area where they are hottest and transmit it to the wall of the pipes which is precisely lapped by the fluid to be heated at the external surface. -There are heat exchange devices, such as certain types of boilers for the production of hot water, or boilers for the production of water vapor, in which the fumes conveying pipes are found to work in temperature conditions high, with the consequent arising of problems related to the resistance of the materials, and it is therefore the task of the present invention to propose a pipe for conveying fumes that is able to ensure, in addition to high heat exchange characteristics, also the absolute guarantee to operate in safe conditions. -The proposed aim is achieved by a pipe for conveying fumes to a heat exchange apparatus, in particular a boiler for the production of water vapor, according to the invention, comprising internally fins in contact with the wall of the pipe itself, characterized from the fact that the fins located near the end of the smoke inlet are made of steel, while the fins located near the end of the smoke outlet are made of aluminum. Further characteristics and advantages will become clearer from the description of two preferred but not exclusive embodiments of the invention, illustrated by way of non-limiting example in the accompanying drawings in which:

- la figura 1 rappresenta il tubo secondo una sezione longitudinale; - le figure 2 e 3 rappresentano rispettivamente le sezioni con il piano II-II e con il piano III-III di figura 1; - figure 1 represents the tube according to a longitudinal section; - figures 2 and 3 respectively represent the sections with the plane II-II and with the plane III-III of figure 1;

- la figura 4 rappresenta in sezione longitudinale un tubo secondo una variante. -Con riferimento alle suddette figure da 1 a 3, à ̈ indicato globalmente con 1 il tubo secondo il trovato destinato ad essere percorso dai fumi nel senso della freccia di figura 1.-In corrispondenza dell'estremità di ingresso dei fumi à ̈ presente in modo noto l'elemento turbolatore 2, ed all'interno del tubo sono poi presenti alette in contatto con la parete del tubo stesso le quali, secondo una caratteristica saliente del trovato, sono suddivise in due gruppi. -Le alette indicate globalmente con 3 del primo gruppo, situate in prossimità dell'estremità di ingresso dei fumi, sono realizzate in acciaio, mentre le alette del secondo gruppo indicate globalmente con 4, situate in prossimità dell'estremità di uscita del fumi, sono realizzate in alluminio, e tra i due gruppi di alette à ̈ presente un tratto di interruzione determinato dalla presenza del distanziale 5„-Nella variante di figura 4 sono ancora presentì due gruppi di alette 3 e 4 realizzate rispettivamente in acciaio ed alluminio come nella prima forma dì realizzazione descritta, ed i due gruppi di alette sono disposti senza soluzione di continuità. -La presenza delle alette in acciaio in prossimità dell'estremità di ingresso dei fumi nel tubo, ove gli stessi presentano temperatura troppo elevata per consentire l'uso di alette in alluminio, garantisce la sicurezza necessaria pur mantenendo una efficienza di scambio termico elevata anche se non a livello ottimale; questo livello viene raggiunto mediante le alette in alluminio inserite in prossimità dell'estremità di uscita dei fumi ove la temperatura degli stessi à ̈ sufficientemente diminuita per consentire l'installazione delle alette stesse in piena tranquillità. -Si à ̈ insomma realizzata una buona situazione di compromesso tra l'esigenza di assicurare al tubo secondo il trovato una elevata efficienza di scambio termico, e la primaria necessità di operare in condizioni di assoluta sicurezza. -Il trovato descritto à ̈ suscettibile di numerose modifiche e varianti, tutte rientranti nell'ambito del concetto inventivo; inoltre tutti i particolari potranno essere sostituiti con altri elementi tecnicamente equivalenti. Figure 4 is a longitudinal section view of a tube according to a variant. -With reference to the aforementioned figures from 1 to 3, 1 generally indicates the pipe according to the invention intended to be traversed by the fumes in the direction of the arrow in figure 1. the turbulator element 2 is known in a known manner, and inside the tube there are fins in contact with the wall of the tube itself which, according to a salient feature of the invention, are divided into two groups. -The fins indicated globally with 3 of the first group, located near the end of the smoke inlet, are made of steel, while the fins of the second group globally indicated with 4, located near the end of the smoke outlet, are made of aluminum, and between the two groups of fins there is an interruption section determined by the presence of the spacer 5â € ž -In the variant of figure 4 there are still two groups of fins 3 and 4 made respectively of steel and aluminum as in the first embodiment described, and the two groups of fins are arranged seamlessly. -The presence of the steel fins near the end of the inlet of the fumes into the pipe, where the same temperature is too high to allow the use of aluminum fins, guarantees the necessary safety while maintaining a high heat exchange efficiency even if not at an optimal level; this level is reached by means of the aluminum fins inserted near the end of the smoke outlet where the temperature of the fumes is sufficiently decreased to allow the installation of the fins in complete tranquility. In short, a good compromise situation has been achieved between the need to ensure a high heat exchange efficiency to the pipe according to the invention, and the primary need to operate in conditions of absolute safety. -The described invention is susceptible of numerous modifications and variations, all of which are within the scope of the inventive concept; furthermore, all the details can be replaced with other technically equivalent elements.

Claims (4)

RIVENDICAZIONI 1. Tubo di convogliamento di fumi in apparecchi di scambio termico, in particolare caldaie per la produzione di acqua calda o di vapor d'acqua, comprendente al proprio interno alette (3, 4) in contatto con la parete del tubo stesso, caratterizzato dal fatto che le alette (3) situate in prossimità dell'estremità di ingresso dei fumi sono realizzate in acciaio, mentre le alette (4) situate in prossimità dell'estremità di uscita dei fumi sono realizzate in alluminio. CLAIMS 1. Pipe for conveying fumes in heat exchange apparatus, in particular boilers for the production of hot water or steam, comprising inside fins (3, 4) in contact with the wall of the pipe itself, characterized by the fact that the fins (3) located near the end of the smoke inlet are made of steel, while the fins (4) located near the end of the smoke outlet are made of aluminum. 2. Tubo secondo la rivendicazione 1, caratterizzato dal fatto che le alette in acciaio (3) e le alette in alluminio (4) si susseguono senza soluzione di continuità. 2. Pipe according to claim 1, characterized in that the steel fins (3) and the aluminum fins (4) follow one another without solution of continuity. 3. Tubo secondo la rivendicazione 1, caratterizzato dal fatto che tra le alette realizzate in acciaio (3) e le alette realizzate in alluminio (4) à ̈ presente un tratto di interruzione . 3. Pipe according to claim 1, characterized in that between the fins made of steel (3) and the fins made of aluminum (4) there is an interruption section. 4. Tubo secondo la rivendicazione 1, caratterizzato dal fatto che tra le alette realizzate in acciaio (3) e le alette realizzate in alluminio (4) à ̈ presente un tratto di interruzione determinato dalla presenza di un elemento distanziale (5).4. Pipe according to claim 1, characterized in that between the fins made of steel (3) and the fins made of aluminum (4) there is an interruption section determined by the presence of a spacer element (5).
ITMI2009A000404A 2009-03-17 2009-03-17 TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR. IT1393254B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ITMI2009A000404A IT1393254B1 (en) 2009-03-17 2009-03-17 TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR.
PCT/EP2010/052724 WO2010105911A1 (en) 2009-03-17 2010-03-03 Tube for conveying exhaust gases in heat exchange devices, particularly boilers for genereting hot water or steam
EP10708516A EP2409105A1 (en) 2009-03-17 2010-03-03 Tube for conveying exhaust gases in heat exchange devices, particularly boilers for generating hot water or steam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI2009A000404A IT1393254B1 (en) 2009-03-17 2009-03-17 TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR.

Publications (2)

Publication Number Publication Date
ITMI20090404A1 true ITMI20090404A1 (en) 2010-09-18
IT1393254B1 IT1393254B1 (en) 2012-04-12

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ITMI2009A000404A IT1393254B1 (en) 2009-03-17 2009-03-17 TUBE OF CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCES, IN PARTICULAR BOILERS FOR THE PRODUCTION OF HOT WATER OR WATER VAPOR.

Country Status (3)

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EP (1) EP2409105A1 (en)
IT (1) IT1393254B1 (en)
WO (1) WO2010105911A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3171116A1 (en) * 2015-11-21 2017-05-24 Linde Aktiengesellschaft Wound heat exchanger comprising turbulators

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000111277A (en) * 1998-10-09 2000-04-18 Toyota Motor Corp Double piping type heat exchanger
JP2000161872A (en) * 1998-11-25 2000-06-16 Toyota Motor Corp Double piping type heat exchanger
JP2005180268A (en) * 2003-12-18 2005-07-07 Isuzu Motors Ltd Egr cooler for engine
JP2008008549A (en) * 2006-06-29 2008-01-17 Kitayama Seisakusho:Kk Heat transfer tube and liquid heating device
US20080264609A1 (en) * 2007-04-26 2008-10-30 Behr Gmbh & Co. Kg Heat exchanger for exhaust gas cooling; method for operating a heat exchanger; system with a heat exchanger for exhaust gas cooling
US20080302094A1 (en) * 2007-06-05 2008-12-11 Sung Il Yoon Cooling apparatus of exhaust gas recirculation system and method using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7073573B2 (en) * 2004-06-09 2006-07-11 Honeywell International, Inc. Decreased hot side fin density heat exchanger
CN101400959B (en) * 2006-03-16 2010-09-29 贝洱两合公司 Heat exchanger for a motor vehicle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000111277A (en) * 1998-10-09 2000-04-18 Toyota Motor Corp Double piping type heat exchanger
JP2000161872A (en) * 1998-11-25 2000-06-16 Toyota Motor Corp Double piping type heat exchanger
JP2005180268A (en) * 2003-12-18 2005-07-07 Isuzu Motors Ltd Egr cooler for engine
JP2008008549A (en) * 2006-06-29 2008-01-17 Kitayama Seisakusho:Kk Heat transfer tube and liquid heating device
US20080264609A1 (en) * 2007-04-26 2008-10-30 Behr Gmbh & Co. Kg Heat exchanger for exhaust gas cooling; method for operating a heat exchanger; system with a heat exchanger for exhaust gas cooling
US20080302094A1 (en) * 2007-06-05 2008-12-11 Sung Il Yoon Cooling apparatus of exhaust gas recirculation system and method using the same

Also Published As

Publication number Publication date
WO2010105911A8 (en) 2010-12-29
IT1393254B1 (en) 2012-04-12
EP2409105A1 (en) 2012-01-25
WO2010105911A1 (en) 2010-09-23

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