WO2015016726A1 - Tuyau d'échangeur de chaleur à combustion - Google Patents

Tuyau d'échangeur de chaleur à combustion Download PDF

Info

Publication number
WO2015016726A1
WO2015016726A1 PCT/PL2014/000089 PL2014000089W WO2015016726A1 WO 2015016726 A1 WO2015016726 A1 WO 2015016726A1 PL 2014000089 W PL2014000089 W PL 2014000089W WO 2015016726 A1 WO2015016726 A1 WO 2015016726A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
central part
section
walls
flattened central
Prior art date
Application number
PCT/PL2014/000089
Other languages
English (en)
Inventor
Krzysztof SZCZEPAŃSKI
Bartłomiej KOSIŃSKI
Original Assignee
Aic S.A.
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 Aic S.A. filed Critical Aic S.A.
Priority to ES14761710.4T priority Critical patent/ES2642538T3/es
Priority to EP14761710.4A priority patent/EP3027996B1/fr
Publication of WO2015016726A1 publication Critical patent/WO2015016726A1/fr

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
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/06—Tubular elements of cross-section which is non-circular crimped or corrugated in cross-section
    • 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
    • F28F1/025—Tubular elements of cross-section which is non-circular with variable shape, e.g. with modified tube ends, with different geometrical features
    • 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

Definitions

  • the invention concerns a pipe for a fired heat exchanger, designed particularly for exchangers fitted with a combustion chamber, where the combustion gases are discharged from the combustion chamber via pipes running through the heat exchange chamber filled with the flowing agent to be heated, water in particular.
  • EP2384837 is a heat exchanger pipe, a fragment of which is non-circular - preferably rectangular - in cross-section.
  • the pipe is corrugated lengthwise and/or crosswise.
  • EP 1429085 Known from European patent application published under No. EP 1429085 is a heat exchanger with a number of pipes placed inside the heat exchange chamber between the front and back plates. Each pipe for the exchange of heat between two agents is partially deformed, i.e. there are fragments along the length of each pipe deformed so as to achieve cross-sections other than circular. The pipes are adjacent on one another with contact points between the pipes in specifically selected locations.
  • the heat exchanger pipe according to the invention with changing cross-section and at least one cylindrical end circular in cross-section which transitions into the corrugated flattened central part with two essentially parallel walls is characterised in that the section of transition between the cylindrical end and the corrugated flattened central part is spherical in shape.
  • the wave lengths and amplitudes, as well as the distance between the essentially parallel walls in the corrugated flattened central part of the pipe change along its length.
  • the wave length and amplitude in the corrugated flattened central part of the pipe, and the distance between the essentially parallel pipe walls decrease smoothly along the pipe length.
  • the diameter of the cylindrical ends of the pipe is lesser than 50 mm, and the thickness of the walls does not exceed 1 mm.
  • the major advantage of the solution according to the invention consists in that it substantially improves the strength parameters of the pipe in the area where the shape of its cross-section changes.
  • FIG. 1 shows the cross-section of a pipe fragment on the side of the first end
  • Fig. 2 presents the view of the pipe fragment from the side of the first end
  • Fig. 3 depicts the cross-section of the pipe in the central part
  • Fig. 4 shows the shape of the whole pipe in a side view.
  • the pipe of a fired heat exchanger is composed of three parts: the first cylindrical end 1A circular in cross-section followed by the corrugated flattened central part 2, which on the other side transitions into the second cylindrical end IB. Both sections 3 of the transition between the cylindrical ends 1A, IB and the corrugated flattened central part 2 are spherical in shape.
  • the corrugated flattened central part 2 of the pipe has two essentially parallel walls 4, and each wall has two grooves which run along the whole length of the wall and form inward ribs 5, where the ribs on the opposite pipe walls 4 form opposite rib pairs, none of which contacts any other.
  • the distance between the parallel walls 4 of the pipe in the area of the opposite ribs 5 in the flattened central part 2 of the pipe narrows down to a crevice.
  • the surface of the flattened central part 2 is waved, where the length L, i.e. the distance between two adjacent peaks, decreases from the first end 1A towards the second end IB. Also the wave amplitude H and the distance D between the essentially parallel walls 4 gradually decrease.
  • the pipe is made of stainless steel, its total length is -1240 mm, and the length of the waved flattened central part is -1000 mm.
  • the diameter S of the cylindrical ends 1A, IB of the pipe is -42 mm, and the thickness of the walls is ⁇ 1 mm.
  • the waved flattened central section 2 of the pipe the wave length L changes from -121 mm to 70.6 mm, the wave amplitude H changes from ⁇ 26 mm to -19 mm, and the distance D between the essentially parallel walls 3 narrows down from -14 mm to -9 mm.
  • the structural details and individual dimensions may differ depending on the requirements and structure of the heat exchanger in which the pipes are installed.
  • the number of inward ribs 5 on parallel walls 4 of the flattened central part 2 may be different, or there may be no ribs at all.
  • the number, length, and amplitude of waves along the flattened central part may be different.
  • the pipe may have only one spherical section, i.e. one end circular in cross-section which transitions into the flattened part, this solution, however, reduces the strength of the other end of the pipe.
  • the section of transition from the part circular in cross- section to the flattened part with two essentially parallel walls is formed into a flattened funnel, i.e. the walls of the transition section are flat.
  • the transition section 3 between those two parts different in cross- section is spherical in shape, which is obtained particularly through hydroforming.
  • the spherical shape substantially increases the strength since the distribution of stress caused by the very high external pressures to which the pipe is exposed in the heat exchange chamber of the heat exchanger is even on circular-spherical surfaces.
  • This particular shape of section 3 improves the strength of the pipe in this critical area and allows for reducing the thickness of the pipe walls and pipe diameters without deteriorating the working parameters.
  • the spherical shape of the section of transition between the cylindrical ends and the flattened central part improves the strength of the pipe in those areas.
  • the changing amplitudes and periods of the waves in the central part of the pipe cause turbulences of the fumes flowing through, and this in turn improves the transfer of heat to the pipe walls.
  • hot fumes the volume of which at the inlet is large and flow speed high, cool down losing in volume, which in turn reduces the speed.
  • the gradually shrinking cross-section of the pipe helps to equalise the speed of fumes, thus equalising the turbulences and allowing for even transfer of heat.
  • the pipe of a fired heat exchanger, according to the invention demonstrates substantially improved heat exchange parameters as compared to the known solutions.

Abstract

L'invention concerne un tuyau d'échangeur de chaleur à combustion à section transversale variable et présentant au moins une extrémité cylindrique à section transversale circulaire qui passe dans la partie centrale aplatie ondulée (2) pourvue de deux parois essentiellement parallèles, ledit tuyau d'échangeur de chaleur étant caractérisé en ce que la section (3) de transition entre l'extrémité cylindrique (1A) et la partie centrale aplatie ondulée (2) est de forme sphérique.
PCT/PL2014/000089 2013-08-02 2014-07-30 Tuyau d'échangeur de chaleur à combustion WO2015016726A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ES14761710.4T ES2642538T3 (es) 2013-08-02 2014-07-30 Tubo para un intercambiador de calor a fuego directo
EP14761710.4A EP3027996B1 (fr) 2013-08-02 2014-07-30 Tuyau d'échangeur de chaleur à combustion

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL404969A PL223582B1 (pl) 2013-08-02 2013-08-02 Rura opalanego wymiennika ciepła
PLP.404969 2013-08-02

Publications (1)

Publication Number Publication Date
WO2015016726A1 true WO2015016726A1 (fr) 2015-02-05

Family

ID=51494477

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2014/000089 WO2015016726A1 (fr) 2013-08-02 2014-07-30 Tuyau d'échangeur de chaleur à combustion

Country Status (4)

Country Link
EP (1) EP3027996B1 (fr)
ES (1) ES2642538T3 (fr)
PL (1) PL223582B1 (fr)
WO (1) WO2015016726A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220325957A1 (en) * 2016-04-01 2022-10-13 Evapco, Inc. Multi-cavity tubes for air-over evaporative heat exchanger
JP2022153922A (ja) * 2021-03-30 2022-10-13 本田技研工業株式会社 熱交換器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458749A (en) * 1983-04-18 1984-07-10 Ex-Cell-O Corporation Radiator having reinforced tubes
EP1429085A1 (fr) 2002-12-10 2004-06-16 Apen Group S.p.A. Ensemble d'échangeur de chaleur et chambre de combustion à haut rendement pour chaudière et réchauffeur d'air
EP2149779A1 (fr) 2008-07-31 2010-02-03 Mitutoyo Corporation Procédé et appareil de mesure de distance interférométrique à onde lumineuse
US20110146594A1 (en) * 2009-12-22 2011-06-23 Lochinvar Corporation Fire Tube Heater
US20110247794A1 (en) * 2010-04-12 2011-10-13 Bradley Arment Flattened tubes for use in heat exchangers and other systems, and associated methods of manufacture and use
EP2384837A2 (fr) 2010-05-03 2011-11-09 Benteler Automobiltechnik GmbH Procédé de fabrication d'un tube d'échange thermique et échangeur thermique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4458749A (en) * 1983-04-18 1984-07-10 Ex-Cell-O Corporation Radiator having reinforced tubes
EP1429085A1 (fr) 2002-12-10 2004-06-16 Apen Group S.p.A. Ensemble d'échangeur de chaleur et chambre de combustion à haut rendement pour chaudière et réchauffeur d'air
EP2149779A1 (fr) 2008-07-31 2010-02-03 Mitutoyo Corporation Procédé et appareil de mesure de distance interférométrique à onde lumineuse
US20110146594A1 (en) * 2009-12-22 2011-06-23 Lochinvar Corporation Fire Tube Heater
US20110247794A1 (en) * 2010-04-12 2011-10-13 Bradley Arment Flattened tubes for use in heat exchangers and other systems, and associated methods of manufacture and use
EP2384837A2 (fr) 2010-05-03 2011-11-09 Benteler Automobiltechnik GmbH Procédé de fabrication d'un tube d'échange thermique et échangeur thermique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220325957A1 (en) * 2016-04-01 2022-10-13 Evapco, Inc. Multi-cavity tubes for air-over evaporative heat exchanger
JP2022153922A (ja) * 2021-03-30 2022-10-13 本田技研工業株式会社 熱交換器
JP7247251B2 (ja) 2021-03-30 2023-03-28 本田技研工業株式会社 熱交換器
US11874075B2 (en) 2021-03-30 2024-01-16 Honda Motor Co., Ltd. Heat exchanger

Also Published As

Publication number Publication date
ES2642538T3 (es) 2017-11-16
PL223582B1 (pl) 2016-10-31
PL404969A1 (pl) 2015-02-16
EP3027996A1 (fr) 2016-06-08
EP3027996B1 (fr) 2017-07-19

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