EP3336474A1 - Wärmetauscher - Google Patents
Wärmetauscher Download PDFInfo
- Publication number
- EP3336474A1 EP3336474A1 EP16275174.7A EP16275174A EP3336474A1 EP 3336474 A1 EP3336474 A1 EP 3336474A1 EP 16275174 A EP16275174 A EP 16275174A EP 3336474 A1 EP3336474 A1 EP 3336474A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fins
- conduit
- heat exchanger
- flow passage
- flow
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 37
- 239000011159 matrix material Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 6
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
Images
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
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
-
- 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
- F28D7/0008—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 for one medium being in heat conductive contact with the conduits for the other medium
-
- 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
- F28D7/10—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 one within the other, e.g. concentrically
-
- 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
- F28F1/003—Multiple wall conduits, e.g. for leak detection
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
- F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/08—Fluid driving means, e.g. pumps, fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
Definitions
- the present disclosure relates to a heat exchanger.
- Components using a matrix typically comprise a conduit for providing fluid flow to an inlet of the matrix.
- the conduit cross-sectional area is less than that of the matrix inlet.
- the matrix and the conduit are sized such that a flow from the conduit can disperse throughout the entire matrix volume to maximise the contact area. As such, providing a relatively wide conduit with a slow fluid flow allows the flow to disperse evenly.
- a heat exchanger comprising a conduit with an interior surface.
- the interior surface defines a first flow passage.
- a first plurality of fins projects inwardly from the interior surface of the conduit.
- the first plurality of fins are angled relative to a longitudinal axis of the conduit so as to form helical flowpaths for fluid flowing through the first flow passage.
- a second flow passage is disposed outwardly of the interior surface and radially outwardly of the first plurality of fins.
- the fins may be straight along their length.
- the fins may be at least partially curved.
- the fins may be curved along their entire length, or the fins may be straight at an inlet to the conduit and gradually curve to be angled at the exit to the conduit.
- the fins may be corrugated.
- the first plurality of fins may be distributed around the entire circumference of the interior surface of the conduit.
- the fins may be distributed around less than 50% of the circumference of the interior surface of the conduit, for example around 25% of the circumference of the interior surface of the conduit.
- the second flow passage may extend around the entire circumference of the conduit. Alternatively the second flow passage may extend around less than 50% of the circumference of the conduit.
- the second flow passage may be circumferentially coterminous with the fins.
- the conduit may further comprise an exterior surface, wherein the second flow passage is disposed between the interior surface and exterior surface of the conduit.
- the conduit may comprise a second plurality of fins which project into the second flow passage.
- the second plurality of fins may be aligned with the first plurality of fins.
- the second plurality of fins may be extensions of the first plurality of fins.
- the conduit cross-section may have a maximum diameter of less than 200mm. In certain embodiments, the conduit may have a diameter of between 50mm and 150mm.
- the conduit may further comprise an outlet, wherein an angle formed between the fins and the longitudinal axis of the conduit at the outlet is between 10° and 45°, for example between 10° and 20°.
- the heat exchanger cross-section may be annular.
- the heat exchanger may be an air-liquid heat exchanger.
- the plurality of fins may project less than 50% of the radial distance between the interior surface and a centre of the conduit, for example between 25% and 50% of the radius of the conduit.
- the fins may be evenly distributed on the interior surface of the conduit.
- a system comprises the heat exchanger as described above.
- a matrix with an inlet is disposed downstream of the first flow passage to receive the flow from the first flow passage.
- the matrix may be one of a heat exchanger matrix or an ozone converter matrix.
- the heat exchanger or system may be part of an aircraft environmental control system.
- a method of operating the heat exchanger as described above comprises the steps of providing a first fluid flow to an inlet of the first flow passage, and a second fluid flow to an inlet of the second flow passage, swirling the fluid flow in the helical flowpaths in the first flow passage, and exchanging heat between the first fluid flow and the second fluid flow.
- a method of operating the system as described above comprises the steps of providing a first fluid flow to an inlet of the first flow passage, and a second fluid flow to an inlet of the second flow passage, swirling the fluid flow in the helical flowpaths in the first flow passage, exchanging heat between the first fluid flow and the second fluid flow, and admitting the first fluid flow into the inlet of the matrix.
- FIG. 1 shows an example heat exchanger in accordance with this disclosure.
- the heat exchanger comprises a conduit 16.
- the conduit 16 is annular, and comprises an interior surface 18 and an exterior surface 20.
- the conduit 16 has a longitudinal axis X.
- a first flow passage 22 is defined by an interior surface 18 of the conduit 16.
- a second flow passage 24 is formed radially outwardly of the interior surface 18.
- the second flow passage 24 extends around less than 50% of the circumference of the conduit 16, for example between 25% and 30% of the circumference.
- the second flow passage 24 is disposed between the interior surface 18 and the exterior surface 20.
- the second flow passage 24 may be disposed outwardly of the exterior surface 20 and formed by a separate member suitably attached to the conduit 16.
- Heat exchange fins 26 project from the interior surface 18 into the first flow passage 22.
- the fins 26 are distributed around the circumference of the conduit 16, extending inwardly from the portion of the conduit 16 where the second flow passage 24 is disposed. Hence, the fins 26 also extend around less than 50% of the circumference of the conduit 16. In the example shown, the fins 26 extend less than 50% of the distance between the interior surface 18 and the centre of the conduit 16. For example, the fins may extend inwardly between 25 and 50% of the conduit radius.
- Heat is exchanged between the first flow passage 22 and the second flow passage 24 through the fins 26. Hence, substantial heat exchange only occurs in the portion of the conduit 16 in which the fins 26 and the second flow passage 24 are disposed.
- FIG. 2 shows another exemplary heat exchanger.
- both the fins 26 and the second flow passage 24 extend around the entire circumference of the conduit 16. Hence, heat exchange occurs around the entire circumference of the conduit 16.
- FIG 3 shows another exemplary heat exchanger.
- second flow passage 24 extends around less than 50% of the conduit 16.
- the heat exchanger comprises both heat exchange fins 26, which are disposed around the portion of the conduit 16 where the second flow passage 24 is present, and non-exchange fins 28, which are distributed around the remaining portion of the circumference of the conduit 16. Heat exchange only occurs in the portion of the conduit 16 where the second flow passage 24 is disposed.
- the non-exchange fins 28 largely only act to guide flow (as will be discussed below).
- FIG. 4A-C there is shown an embodiment of a heat exchanger consistent with Figure 1 .
- the embodiment of Figure 1 is used only as an example, and the features described below could similarly be present in any of the examples of Figure 2 or 3 .
- Figure 4A shows an oblique view of the heat exchanger of Figure 1 .
- the conduit 16 has an inlet 30 and an outlet 32, and is generally of the form as discussed above in relation to Figures 1-3 .
- the fins 26 are angled relative to a longitudinal axis X of the conduit 16 in order to direct and swirl the flow in the first flow passage 22.
- the fins 26 form helical flowpaths 27 therebetween in order to direct the flow.
- the flow in the first flow passage 22 is imparted with an angular momentum in order to 'spin' outward from the outlet 32 of the conduit 16 to an inlet of a downstream matrix (not shown).
- the flow is more evenly distributed across an inlet of the matrix, particularly at the points of the matrix inlet furthest from the centre of the outlet 32 of the conduit 16.
- Figures 6 and 7 show a swirled fluid flow from a conduit 2 entering a matrix 4.
- the flow from the conduit 2 is imparted with an angular momentum by the fins of the heat exchanger.
- the flow is dispersed downstream to an inlet 6 of the matrix 4.
- the matrix could be for the purpose of heat exchange or facilitating a chemical reaction. It is envisaged that the matrix could form part of a heat exchanger or ozone converter for an environmental control system of an aircraft.
- the fins 26 are straight along their length.
- the fins 26 form an angle with the longitudinal axis X at the outlet 32 of the conduit 30. This angle may be between 10° and 45°. In some examples, the angle may be between 10° and 20°.
- FIGS 5A-C show an exemplary heat exchanger.
- the heat exchanger is similar to that of Figures 4A-C , but in this example fins 26 are curved along their length.
- the fins 26 are straight at the inlet 30 of the conduit 16, and curve to be angled at the outlet 32. Again, the fins 26 form an angle with the longitudinal axis X of the conduit 16 at the outlet 32. The angle may be the same as that discussed in the above "straight-fin" embodiment.
- the fins 26 could be corrugated along their length to provide increased heat-transfer interaction with the flow in the first flow passage 22.
- the fins would further be arranged to form a helical flowpath 27 in order to swirl the flow, as discussed above.
- non-exchange fins 28 could have the form of either of the heat exchange fins 26 of Figures 4A or 5A . These non-exchange fins 28 would also serve to swirl the flow through the first flow passage 22 as discussed above in relation to the heat exchange fins 26.
- a second set of fins 25 may project into the second flow passage 24. This would provide increased interaction with the fluid flow in the second flow passage 24 to improve heat exchange with a fluid therein.
- the second set of fins 25 may be aligned with the heat exchange fins 26, or be an extension of the heat exchange fins 26 through the interior surface 18 of the conduit 16. Such an embodiment is illustrated schematically by dotted lines in Figures 4C and 5C .
- the fins of the second set of fins 25 may be circumferentially offset from the first set of fins 26. For example, they may be positioned circumferentially between the first fins.
- heat-exchanger fins can be arranged on the interior surface of a conduit which supplies a fluid to a matrix.
- the fins are angled to form a helical flowpath and thereby as a flow swirler.
- the conduit can swirl flow for a downstream matrix and provide for heat-exchange.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16275174.7A EP3336474B1 (de) | 2016-12-16 | 2016-12-16 | Wärmetauscher |
US15/836,968 US20180172361A1 (en) | 2016-12-16 | 2017-12-11 | Heat exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16275174.7A EP3336474B1 (de) | 2016-12-16 | 2016-12-16 | Wärmetauscher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3336474A1 true EP3336474A1 (de) | 2018-06-20 |
EP3336474B1 EP3336474B1 (de) | 2021-04-07 |
Family
ID=57570746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16275174.7A Active EP3336474B1 (de) | 2016-12-16 | 2016-12-16 | Wärmetauscher |
Country Status (2)
Country | Link |
---|---|
US (1) | US20180172361A1 (de) |
EP (1) | EP3336474B1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11549644B2 (en) | 2019-07-09 | 2023-01-10 | Seatrec, Inc. | Apparatus and method for making internally finned pressure vessel |
US20220128318A1 (en) * | 2020-10-28 | 2022-04-28 | Carrier Corporation | Heat transfer tube for heat pump application |
US11982499B2 (en) | 2022-08-05 | 2024-05-14 | Hamilton Sundstrand Corporation | Heat exchanger with heat transfer augmentation features |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB778679A (en) * | 1954-11-26 | 1957-07-10 | Brown Fintube Co | Heat exchanger conduits |
GB1032990A (en) * | 1963-11-19 | 1966-06-15 | Commissariat Energie Atomique | Tubular heat exchangers |
GB2078927A (en) * | 1980-06-20 | 1982-01-13 | Grumman Energy Systems Inc | Heat exchange system |
JPH03238128A (ja) * | 1990-02-14 | 1991-10-23 | Shinko Metal Prod Kk | 熱交換器及びその製造方法 |
JP2007271122A (ja) * | 2006-03-30 | 2007-10-18 | Kobelco & Materials Copper Tube Inc | 熱交換器 |
WO2011021636A1 (ja) * | 2009-08-21 | 2011-02-24 | ダイキン工業株式会社 | 熱交換器及びそれを備えた冷凍装置 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5655599A (en) * | 1995-06-21 | 1997-08-12 | Gas Research Institute | Radiant tubes having internal fins |
EP2243541B1 (de) * | 2006-09-08 | 2012-12-05 | Parker Hannifin Manufacturing Netherlands (Filtration and Separation) B.V. | Vorrichtung zur Luftbehandlung in Flugzeugen umfassend einer umwandlung von Ozon |
JP2009162395A (ja) * | 2007-12-28 | 2009-07-23 | Showa Denko Kk | 二重管式熱交換器 |
JP5904108B2 (ja) * | 2011-12-19 | 2016-04-13 | 株式会社デンソー | 排気熱交換装置 |
-
2016
- 2016-12-16 EP EP16275174.7A patent/EP3336474B1/de active Active
-
2017
- 2017-12-11 US US15/836,968 patent/US20180172361A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB778679A (en) * | 1954-11-26 | 1957-07-10 | Brown Fintube Co | Heat exchanger conduits |
GB1032990A (en) * | 1963-11-19 | 1966-06-15 | Commissariat Energie Atomique | Tubular heat exchangers |
GB2078927A (en) * | 1980-06-20 | 1982-01-13 | Grumman Energy Systems Inc | Heat exchange system |
JPH03238128A (ja) * | 1990-02-14 | 1991-10-23 | Shinko Metal Prod Kk | 熱交換器及びその製造方法 |
JP2007271122A (ja) * | 2006-03-30 | 2007-10-18 | Kobelco & Materials Copper Tube Inc | 熱交換器 |
WO2011021636A1 (ja) * | 2009-08-21 | 2011-02-24 | ダイキン工業株式会社 | 熱交換器及びそれを備えた冷凍装置 |
Also Published As
Publication number | Publication date |
---|---|
US20180172361A1 (en) | 2018-06-21 |
EP3336474B1 (de) | 2021-04-07 |
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