EP2295913A2 - Spiralrohr-Wärmetauscher mit geneigten Rohrabschnitten - Google Patents

Spiralrohr-Wärmetauscher mit geneigten Rohrabschnitten Download PDF

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Publication number
EP2295913A2
EP2295913A2 EP10173013A EP10173013A EP2295913A2 EP 2295913 A2 EP2295913 A2 EP 2295913A2 EP 10173013 A EP10173013 A EP 10173013A EP 10173013 A EP10173013 A EP 10173013A EP 2295913 A2 EP2295913 A2 EP 2295913A2
Authority
EP
European Patent Office
Prior art keywords
heat
pipe
transfer pipe
transfer
upstream
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.)
Granted
Application number
EP10173013A
Other languages
English (en)
French (fr)
Other versions
EP2295913A3 (de
EP2295913B1 (de
EP2295913A8 (de
Inventor
Yoshio Ando
Yasuhiro Sano
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.)
Paloma Co Ltd
Original Assignee
Paloma Kogyo KK
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 Paloma Kogyo KK filed Critical Paloma Kogyo KK
Publication of EP2295913A2 publication Critical patent/EP2295913A2/de
Publication of EP2295913A3 publication Critical patent/EP2295913A3/de
Publication of EP2295913A8 publication Critical patent/EP2295913A8/de
Application granted granted Critical
Publication of EP2295913B1 publication Critical patent/EP2295913B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • 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
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
    • F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the present invention relates to a heat exchanger that exchanges heat between external fluid introduced from outside and a heat-transfer member for heat exchange.
  • heat-transfer pipes are disposed so as to cross a flow path of an external fluid on an upstream side and a downstream side, respectively, of the flow path.
  • heat-transfer pipes are arranged so as to horizontally cross an upstream side and a downstream side, respectively, of the flow path of an external fluid. Accordingly, drain attached to the heat-transfer pipes as a result of heat exchange is likely to remain, which may hinder heat exchange and thus disable maintenance of efficiency of heat exchange.
  • a heat exchanger includes a heat-transfer pipe for heat exchange and is configured such that heat exchange is performed between an external fluid flowing outside the heat-transfer pipe and the heat-transfer pipe.
  • the heat exchanger may include a housing space for housing the heat-transfer pipe.
  • the heat exchanger may be configured such that the external fluid introduced from outside is discharged after flowing through the housing space in which the heat-transfer pipe for heat exchange is housed, to thereby perform heat exchange between the external fluid and an internal fluid flowing inside the heat-transfer pipe.
  • the heat exchanger may include a spiral heat-transfer pipe having a spiral shape as the heat-transfer pipe.
  • This spiral shape can also be described as helical shape.
  • the spiral heat-transfer pipe may include an upstream heat-transfer pipe section disposed on an upstream side of a flow path of the external fluid in a direction crossing the flow path; and a downstream heat-transfer pipe section disposed on a downstream side of the flow path in a direction crossing the flow path.
  • each of an axis of the upstream heat-transfer pipe section and an axis of the downstream heat-transfer pipe section in the spiral heat-transfer pipe may be tilted with respect to a horizontal plane, and one of the axes may be relatively tilted with respect to the other of the axes, so that the axis of the upstream heat-transfer pipe section crosses the axis of the downstream heat-transfer pipe section.
  • cross here may be interpreted to mean that, when the spiral heat-transfer pipe is projected from the upstream side toward the downstream side of the flow path of the external fluid, the axis of the upstream heat-transfer pipe section and the axis of the downstream heat-transfer pipe section cross each other in a projected plan view.
  • the heat exchanger configured to have the tilted spiral heat-transfer pipe as above, since each of the upstream heat-transfer pipe section and the downstream heat-transfer pipe section, each crossing the flow path of the external fluid, is tilted with respect to the horizontal plane, drain, even if attached to the heat-transfer pipe as a result of heat exchange, can be made to flow along the tilt toward side areas of the flow path, and thus is unlikely to remain. Accordingly, heat exchange is unlikely to be hindered by remaining drain attached to each of the upstream heat-transfer pipe section and the downstream heat-transfer pipe section. Thus, an improved efficiency of heat exchange can be achieved.
  • the upstream heat-transfer pipe section and the downstream heat-transfer pipe section are disposed in a positional relationship such that the axis of the upstream heat-transfer pipe section and the axis of the downstream heat-transfer pipe section cross each other in the projected plan view when the spiral heat-transfer pipe is projected from the upstream side toward the downstream side of the flow path.
  • This configuration can reduce areas through which the external fluid simply passes, as compared with a non-tilted configuration (for example, a configuration in which the axis of the upstream heat-transfer pipe section and the axis of the downstream heat-transfer pipe section are parallel and overlapped in the projected plan view).
  • a non-tilted configuration for example, a configuration in which the axis of the upstream heat-transfer pipe section and the axis of the downstream heat-transfer pipe section are parallel and overlapped in the projected plan view.
  • a plurality of the spiral heat-transfer pipes may be housed in the housing space so as to form multiple spirals.
  • the plurality of the spiral heat-transfer pipes may be stacked in a direction crossing a flowing direction of the external fluid (specifically, a direction crossing a surface defined by a longitudinal direction of the spiral heat-transfer pipes and the flowing direction, for example a vertical direction) to form multiple spirals.
  • each of the plurality of the spiral heat-transfer pipes may be relatively shifted with respect to the other spiral heat-transfer pipes in a predetermined direction.
  • the predetermined direction may be a direction crossing a neighboring direction of the spiral heat-transfer pipes or the flowing direction of the external fluid.
  • At least two most neighboring spiral heat-transfer pipes may be configured as follows: one of the two spiral heat-transfer pipes is located upstream from the other in the flowing direction of the external fluid, and thereby the two spiral heat-transfer pipes are shifted with respect to each other.
  • the two spiral heat-transfer pipes may be stacked in the vertical direction (in other words, the two spiral heat-transfer pipes may be relatively shifted with respect to each other in the vertical direction).
  • a heat exchanger 1 houses a heat-transfer pipe group 2 in a housing space (a space inside a housing 10) 11.
  • the heat exchanger 1 is configured such that an external fluid introduced from outside flows through the housing space 11 and is discharged from the housing space 11, to thereby perform heat exchange between the external fluid and an internal fluid flowing inside pipes 2a-2h.
  • the heat-transfer pipe group 2 includes a first pipe set 2x and a second pipe set 2y, as shown in FIG. 1 .
  • the first pipe set 2x includes pipes 2a, 2b, 2c, and 2b
  • the second pipe set 2y includes pipes 2e, 2f, 2g and 2h.
  • Each of the pipes 2a-2h is formed to have a spiral shape. This spiral shape can also be described as helical shape. Each of the pipes 2a-2h has each different outside diameter of the spiral shape. In other words, sizes of areas spirally surrounded by the respective pipes 2a-2h are different.
  • the first pipe set 2x and the second pipe set 2y are stacked along a stacking direction d3, while relatively shifted slightly with respect to each other in a flowing direction d1 of the external fluid (see FIGS. 3A-3D ).
  • the stacking direction d3 is interpreted as a direction perpendicular to an alignment direction of the pipes 2a-2d, or an alignment direction 2e ⁇ 2h (the same as the flowing direction d1 of the external fluid) (see FIG. 1 ).
  • the pipe 2a is located upstream from the pipe 2e in the flowing direction d1 of the external fluid, and thereby the pipe 2a and the pipe 2e are relatively shifted with respect to each other in the flowing direction d1 of the external fluid (see FIGS. 3A-3D ).
  • the pipe 2a and the pipe 2e are also relatively shifted with respect to each other in the stacking direction d3 (the vertical direction). That is, the pipe 2a and the pipe 2e are stacked in the stacking direction d3 (the vertical direction) and also are relatively shifted with respect to each other in the flowing direction d1.
  • spacers 3 are disposed in the heat-transfer pipe group 2 at both longitudinal end sides of the heat-transfer pipe group 2. Specifically, the spacers 3 are disposed between the first pipe set 2x and the second pipe set 2y at the both longitudinal end sides of the heat-transfer group 2.
  • the pipes 2a-2h includes sections disposed in a direction crossing a flow path of the external fluid on each of an upstream side and a downstream side of the flow path.
  • a specific explanation is provided here regarding the first pipe set 2x.
  • the second pipe set 2y i.e., the pipes 2e-2h), of which a detailed explanation is omitted, has the same structure as the first pipe set 2x.
  • the pipe 2a has a section on the upstream side (hereinafter referred to as the "upstream pipe") 22a and a section on the downstream side (hereinafter referred to as the "downstream pipe") 24a.
  • the pipe 2b has an upstream pipe 22b and a downstream pipe 24b
  • the pipe 2c has an upstream pipe 22c and a downstream pipe 24c
  • the pipe 2d has an upstream pipe 22d and a downstream pipe 24d.
  • the upstream pipes 22a-22d and upstream pipes (not specifically shown) of the pipes 2e-2h are also collectively referred to as the "upstream pipe 22”.
  • the downstream pipes 24a-24d and downstream pipes (not specifically shown) of the pipes 2e-2h are also collectively referred to as the "downstream pipe 24".
  • the external fluid flows crossing over the upstream pipe 22 of the pipes 2a-2h, and then flows crossing over the downstream pipe 24 of the pipes 2a-2h.
  • each of the upstream pipe 22 and the downstream pipe 24 is tilted with respect to a horizontal plane, as shown in FIG. 2 .
  • the upstream pipe 22 and the downstream pipe 24 are arranged in a positional relationship such that an axis 12 of the upstream pipe 22 crosses an axis 14 of the downstream pipe 24 in a projected plan view when the housing space 11 is projected from the upstream side toward the downstream side of the flow path.
  • one of the axis 12 of the upstream pipe 22 and the axis 14 of the downstream pipe 24 is relatively tilted with respect to the other, and thereby the axis 12 of the upstream pipe 22 crosses the axis 14 of the downstream pipe 24.
  • the upstream pipe 22 and the downstream pipe 24 are configured to have a same length and a same tilting angle.
  • “Have the same tilting angle” here means that interior angles with respect to a horizontal plane are the same. More specifically, an interior angle ⁇ formed by the horizontal plane and the upstream pipe 22 and an interior angle ⁇ formed by the horizontal plane and the downstream pipe 24 are the same.
  • the axis 12 of the upstream pipe 22 and the axis 14 of the downstream pipe 24 cross each another in a position ⁇ in a longitudinal direction d2 of the pipes 2a-2h obtained by equally dividing a length of each of the pipes 2a-2h by the number of the stacked pipe sets.
  • the downstream pipe 24 may have a tilting angle larger than the upstream pipe 22.
  • the interior angle ⁇ formed by the horizontal plane and the downstream pipe 24 may be larger than the interior angle ⁇ formed by the horizontal plane and the upstream pipe 22.
  • the first pipe set 2x and the second pipe set 2y are relatively shifted with respect to each other in the flowing direction d1 of the external fluid.
  • each of the upstream pipe 22 and the downstream pipe 24 is tilted with respect to the horizontal plane. Accordingly, drain, even if attached to the upstream pipe 22 and the downstream pipe 24 as a result of heat exchange, can be made to flow along tilts of the upstream pipe 22 and the downstream pipe 24, which are tilted with respect to the horizontal planes, toward side areas of the flow path. As a result, the drain is unlikely to remain. Thus, heat exchange is unlikely to be hindered by remaining drain attached to each of the upstream pipe 22 and the downstream pipe 24, and thereby an efficiency of heat exchange can be maintained.
  • the upstream pipe 22 and the downstream pipe 24 are arranged in the positional relationship such that the axis 12 of the upstream pipe 22 and the axis 14 of the downstream pipe 24 cross each other in the projected plan view when the housing space 11 is projected from the upstream side toward the downstream side of the flow path of the external fluid.
  • This configuration can reduce areas through which the external fluid simply passes (areas in which the upstream pipe 22 or the downstream pipe is not present in FIG.
  • the pipes 2a-2h correspond to examples of a heat-transfer pipe and a spiral heat-transfer pipe
  • the upstream pipe 22 corresponds to the upstream heat-transfer pipe section
  • the downstream pipe 24 corresponds to the downstream heat-transfer pipe section.
  • first pipe set 2x and the second pipe set 2y are arranged to form double spirals in the above-described embodiment, three or more pipe sets may be arranged to form triple or more spirals.
  • the length (L) (see FIG. 2 ) of the upstream pipe 22 and the length (L') (see FIG. 2 ) of the downstream pipe 24 may be different.
  • the tilting angle of the upstream pipe 22 and the tilting angle of the downstream pipe 24 may be different. That is, the interior angle ⁇ (see FIG. 2 ) formed by the horizontal plane and the upstream pipe 22, and the interior angle ⁇ (see FIG. 2 ) formed by the horizontal plane and the downstream pipe 24 may be different. In this case, such a configuration may be possible that the length of the upstream pipe 22 and the length of the downstream pipe 24 is different and also the tilting angle of the upstream pipe 22 and the tilting angle of the downstream pipe 24 are different.
  • the heat exchanger 1 in the above embodiment may be constituted by only one of the first pipe set 2x and the second pipe set 2y.
  • the upstream pipe 22 and the downstream pipe 24 may be configured to cross each other, as shown in FIGS. 4A and 4B .
  • a direction of shifting the first pipe set 2x with respect to the second pipe set 2y in the above-described embodiment is not limited to the direction of the flow path as long as the flow of the external fluid is likely to be disturbed by the shifting.
  • the pipes 2a-2h may be configured such that when the pipes 2a-2h are projected from the upstream side toward the downstream side of the flow path of the external fluid, the axis 12 of the upstream pipe 22 and the axis 14 of the downstream pipe 24 cross each other only in part in the projected plan view. More specifically, only a part of the upstream pipe 22 and only a part of the downstream pipe 24 may be relatively tilted with each other, and thereby the part of the upstream pipe 22 and the part of the downstream pipe 24 cross each other. In this case, the remaining part of the upstream pipe 22 and the remaining part of the downstream pipe 24 may be parallel.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP10173013.3A 2009-08-20 2010-08-17 Wärmetauscher mit geneigten Rohrabschnitten Active EP2295913B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009191138A JP5073719B2 (ja) 2009-08-20 2009-08-20 熱交換器

Publications (4)

Publication Number Publication Date
EP2295913A2 true EP2295913A2 (de) 2011-03-16
EP2295913A3 EP2295913A3 (de) 2011-12-07
EP2295913A8 EP2295913A8 (de) 2012-02-22
EP2295913B1 EP2295913B1 (de) 2013-06-05

Family

ID=43242286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10173013.3A Active EP2295913B1 (de) 2009-08-20 2010-08-17 Wärmetauscher mit geneigten Rohrabschnitten

Country Status (5)

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US (1) US20110042039A1 (de)
EP (1) EP2295913B1 (de)
JP (1) JP5073719B2 (de)
AU (1) AU2010212319B2 (de)
ES (1) ES2417322T3 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5946476B2 (ja) * 2011-03-07 2016-07-06 アアヴィッド・サーマロイ・エルエルシー らせん状流体経路を備えた熱伝達装置
WO2013149433A1 (zh) * 2012-04-05 2013-10-10 Zhu Hongfeng 一种烹饪炉具
IT201700096656A1 (it) * 2017-08-28 2019-02-28 Cosmogas Srl Scambiatore di calore per una caldaia, e tubo di scambiatore di calore
CN110595066B (zh) * 2019-08-07 2021-08-06 西安交通大学 全预混冷凝式燃气换热设备及换热方法

Citations (2)

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Publication number Priority date Publication date Assignee Title
JP2008025976A (ja) 2006-07-25 2008-02-07 Noritz Corp 熱交換器および温水装置
JP2008032252A (ja) 2006-07-26 2008-02-14 Noritz Corp 熱交換器および温水装置

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JP2008032252A (ja) 2006-07-26 2008-02-14 Noritz Corp 熱交換器および温水装置

Also Published As

Publication number Publication date
JP5073719B2 (ja) 2012-11-14
JP2011043281A (ja) 2011-03-03
AU2010212319A1 (en) 2011-03-10
US20110042039A1 (en) 2011-02-24
ES2417322T3 (es) 2013-08-07
EP2295913A3 (de) 2011-12-07
AU2010212319B2 (en) 2015-06-25
EP2295913B1 (de) 2013-06-05
EP2295913A8 (de) 2012-02-22

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