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WO2001065193A1 - Improvements in or relating to heat exchangers - Google Patents

Improvements in or relating to heat exchangers Download PDF

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Publication number
WO2001065193A1
WO2001065193A1 PCT/GB2001/000850 GB0100850W WO0165193A1 WO 2001065193 A1 WO2001065193 A1 WO 2001065193A1 GB 0100850 W GB0100850 W GB 0100850W WO 0165193 A1 WO0165193 A1 WO 0165193A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubes
primary
fluid
heat transfer
tube
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.)
Ceased
Application number
PCT/GB2001/000850
Other languages
French (fr)
Inventor
Geoffrey Gerald Weedon
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT01907928T priority Critical patent/ATE265663T1/en
Priority to DE60103026T priority patent/DE60103026T2/en
Priority to EP01907928A priority patent/EP1259773B1/en
Priority to AU35794/01A priority patent/AU3579401A/en
Publication of WO2001065193A1 publication Critical patent/WO2001065193A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • 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
    • F28D7/0058—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 only one medium being tubes having different orientations to each other or crossing the conduit for the other heat exchange 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
    • F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids

Definitions

  • the invention concerns improvements in or relating to heat exchangers.
  • the present invention has as its object the provision of a novel heat exchange apparatus wherein heat from a primary fluid contained in primary heat transfer tubes can be transferred to or from a secondary fluid contained in secondary heat transfer tubes by the use of an intermediate fluid flowing outside of, and in flow coinmunication with, both primary and secondary tubes.
  • a heat exchange apparatus includes a number of parallel primary heat transfer tubes, regularly arrayed, with clearance between each tube in two dimensions perpendicular to their length, with secondary heat transfer tubes arranged in successive rows passing between the primary tubes, each secondary tube row being arranged orthogonally one to the next, and each secondary tube row being arranged orthogonally to the primary tubes.
  • the secondary heat recovery tubes may be arranged such that two or more adjacent secondary tube rows in a direction parallel to the primary tubes may be arranged in the same direction, upstream of successive groups of tube rows arranged orthogonally to them.
  • the primary fluid flows inside the primary tubes, whilst the intermediate fluid flows outside the tubes in a direction generally in parallel with the primary fluid, either in a co-current or counter-current direction.
  • the direction of flow of the secondary fluid is generally transverse to the direction of flow of the primary and intermediate fluids.
  • the distance between successive orthogonal rows of secondary tubes is preferably rninimised whereby the intermediate fluid is caused to flow around the secondary tubes in a tortuous manner, thereby increasing its turbulence and local heat transfer coefficient against both primary and secondary tubes.
  • the heat exchanger can be fabricated from standard manufactured components.
  • the spacing between the primary and secondary tubes is preferably small, generally between 0 and 0.5 times the secondary tube outside diameter, in order to minimise the superficial surface area available to the intermediate fluid and thereby to maximise its velocity and corresponding heat transfer coefficient.
  • the secondary tubes may be in close proximity or in contact with the primary tubes thereby to eliminate the possibility of tube vibration in the secondary tubes.
  • the secondary tubes may be braced one to another or to additional members to prevent vibration.
  • each successive row of secondary tubes is minimised to provide as tortuous path as possible for the intermediate fluid and to minimise the size of the overall heat exchanger.
  • the distance between successive rows may be in the range 0 - 0.5 times the secondary tube outside diameter.
  • the primary and secondary tubes may be profiled in order to modify the heat transfer characteristics.
  • the tubes may be finned, twisted, shaped, of varying diameters, or contain inserts.
  • Inert shapes may be placed between the secondary tubes and around the primary tubes in a regular or random manner to further promote turbulence and heat transfer.
  • a further variation of the invention may provide for heat transfer from the intermediate fluid to both the primary and secondary fluid, or from both the primary and secondary fluid to the intermediate fluid.
  • primary and secondary fluids may be the same fluid, whilst the primary and secondary tubes may also be connected in parallel or series.
  • the primary and secondary fluids could be water and/or steam with the intermediate fluid being combustion gases for heating same.
  • a still further variation to the utilisation of the apparatus may be the use of different fluid streams within the secondary tubes, flowing either in the same, or reverse, or a transverse directions. In this way heat may be transferred to a number of different fluid streams from the same stream or streams within a single apparatus.
  • the provision of tubes in three dimensions serves to maximise the tube surface area per unit volume of heat exchanger, whilst maximising the tortuosity of the intermediate fluid thereby maximising the overall heat transfer coefficients in an efficient manner.

Landscapes

  • 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)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

A heat exchanger is provided with primary and secondary heat transfer tubes, the primary tubes being in regular parallel array and the secondary tubes being arranged in successive rows passing between the primary tubes, each secondary tube row being orthogonal one to the next and being orthogonal to the primary tubes.

Description

IMPROVEMENTS IN OR RELATING TO HEAT EXCHANGERS
The invention concerns improvements in or relating to heat exchangers.
In particular the present invention has as its object the provision of a novel heat exchange apparatus wherein heat from a primary fluid contained in primary heat transfer tubes can be transferred to or from a secondary fluid contained in secondary heat transfer tubes by the use of an intermediate fluid flowing outside of, and in flow coinmunication with, both primary and secondary tubes.
According to the invention a heat exchange apparatus includes a number of parallel primary heat transfer tubes, regularly arrayed, with clearance between each tube in two dimensions perpendicular to their length, with secondary heat transfer tubes arranged in successive rows passing between the primary tubes, each secondary tube row being arranged orthogonally one to the next, and each secondary tube row being arranged orthogonally to the primary tubes.
Further to this, the secondary heat recovery tubes may be arranged such that two or more adjacent secondary tube rows in a direction parallel to the primary tubes may be arranged in the same direction, upstream of successive groups of tube rows arranged orthogonally to them.
The primary fluid flows inside the primary tubes, whilst the intermediate fluid flows outside the tubes in a direction generally in parallel with the primary fluid, either in a co-current or counter-current direction.
The direction of flow of the secondary fluid is generally transverse to the direction of flow of the primary and intermediate fluids. The distance between successive orthogonal rows of secondary tubes is preferably rninimised whereby the intermediate fluid is caused to flow around the secondary tubes in a tortuous manner, thereby increasing its turbulence and local heat transfer coefficient against both primary and secondary tubes.
In this manner a heat exchanger can be produced which by virtue of high heat transfer coefficients can be made more compact than conventional heat exchangers without suffering from excessive fluid pressure drops.
Furthermore, the heat exchanger can be fabricated from standard manufactured components.
The spacing between the primary and secondary tubes is preferably small, generally between 0 and 0.5 times the secondary tube outside diameter, in order to minimise the superficial surface area available to the intermediate fluid and thereby to maximise its velocity and corresponding heat transfer coefficient.
Advantageously, the secondary tubes may be in close proximity or in contact with the primary tubes thereby to eliminate the possibility of tube vibration in the secondary tubes.
Alternatively, if necessary, the secondary tubes may be braced one to another or to additional members to prevent vibration.
Preferably the distance between each successive row of secondary tubes is minimised to provide as tortuous path as possible for the intermediate fluid and to minimise the size of the overall heat exchanger.
For example, the distance between successive rows may be in the range 0 - 0.5 times the secondary tube outside diameter. The primary and secondary tubes may be profiled in order to modify the heat transfer characteristics. For example, the tubes may be finned, twisted, shaped, of varying diameters, or contain inserts.
Inert shapes may be placed between the secondary tubes and around the primary tubes in a regular or random manner to further promote turbulence and heat transfer.
A further variation of the invention may provide for heat transfer from the intermediate fluid to both the primary and secondary fluid, or from both the primary and secondary fluid to the intermediate fluid.
Additionally, the primary and secondary fluids may be the same fluid, whilst the primary and secondary tubes may also be connected in parallel or series.
For example, the primary and secondary fluids could be water and/or steam with the intermediate fluid being combustion gases for heating same.
A still further variation to the utilisation of the apparatus may be the use of different fluid streams within the secondary tubes, flowing either in the same, or reverse, or a transverse directions. In this way heat may be transferred to a number of different fluid streams from the same stream or streams within a single apparatus.
Overall, the provision of tubes in three dimensions serves to maximise the tube surface area per unit volume of heat exchanger, whilst maximising the tortuosity of the intermediate fluid thereby maximising the overall heat transfer coefficients in an efficient manner.
This results in a potentially more compact and cost-effective heat exchanger than has hitherto been achievable with conventional tubular heat exchangers.

Claims

CLAIMS:
l. A heat exchange apparatus in which in use heat from primary fluid contained in primary heat transfer tubes is transferred to or from a secondary fluid contained in secondary heat transfer tubes by the use of an intermediate fluid flowing outside of, and in flow communication with, both primary and secondary tubes, the apparatus including a number of parallel primary heat transfer tubes, regularly arrayed, with clearance between each tube in two dimensions perpendicular to their length, with secondary heat transfer tubes arranged in successive rows passing between the primary tubes, each secondary tube row being arranged orthogonally one to the next, and each secondary tube row being arranged orthogonally to the primary tubes.
2. An apparatus according to Claim 1 in which the secondary heat recovery tubes are arranged such that two or more adjacent secondary tube rows in a direction parallel to the primary tubes are arranged in the same direction, upstream of successive groups of tube rows orthogonally to them.
3. An apparatus according to any one of the preceding claims in which in use primary fluid is adapted to flow inside the primary tubes, and the intermediate fluid flows outside the tubes in a direction generally parallel with the primary fluid, in co- current or counter-current direction.
4. An apparatus according to any one of the preceding claims in which the flow of the secondary fluid is adapted to be generally transverse to the direction of flow of the primary and intermediate fluids.
5. An apparatus according to any one of the preceding claims in which the spacing between the primary and secondary tubes lies in the range of between 0 and 0.5 times the secondary tube outer diameter.
6. An apparatus according to any one of the preceding claims in which the spacing between each successive row of secondary tubes lies in the range of between 0 and 0.5 times the secondary tube outer diameter.
7. An apparatus according to any one of the preceding claims in which the secondary tubes are braced one to another.
8. An apparatus according to any one of the preceding claims 1 to 6 in which the secondary tubes are braced to additional members.
9. An apparatus according to any one of the preceding claims in which the primary and secondary tubes are profiled to enhance heat transfer.
10. An apparatus according to any one of the preceding claims in which the primary and secondary tubes contain inserts or devices to enhance heat transfer.
11. An apparatus according to any one of the preceding claims in which the primary and secondary tubes are adapted to contain the same fluid.
12. An apparatus according to Claim 11 in which the primary and secondary tubes are connected in either series or parallel.
13. An apparatus according to any one of the preceding claims 1 to 8 in which the secondary tubes are adapted to contain different fluid streams flowing in the same, or reverse, or transverse directions.
14. An apparatus according to any one of the preceding claims in which inert shapes surround the primary and secondary tubes in a regular or random manner to enhance heat transfer.
PCT/GB2001/000850 2000-03-01 2001-02-28 Improvements in or relating to heat exchangers Ceased WO2001065193A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT01907928T ATE265663T1 (en) 2000-03-01 2001-02-28 IMPROVED HEAT EXCHANGER
DE60103026T DE60103026T2 (en) 2000-03-01 2001-02-28 IMPROVED HEAT EXCHANGER
EP01907928A EP1259773B1 (en) 2000-03-01 2001-02-28 Improvements in or relating to heat exchangers
AU35794/01A AU3579401A (en) 2000-03-01 2001-02-28 Improvements in or relating to heat exchangers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0004935.3 2000-03-01
GB0004935A GB2359881A (en) 2000-03-01 2000-03-01 Improvements in or relating to heat exchangers

Publications (1)

Publication Number Publication Date
WO2001065193A1 true WO2001065193A1 (en) 2001-09-07

Family

ID=9886739

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/000850 Ceased WO2001065193A1 (en) 2000-03-01 2001-02-28 Improvements in or relating to heat exchangers

Country Status (6)

Country Link
EP (1) EP1259773B1 (en)
AT (1) ATE265663T1 (en)
AU (1) AU3579401A (en)
DE (1) DE60103026T2 (en)
GB (1) GB2359881A (en)
WO (1) WO2001065193A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107376604A (en) * 2017-09-21 2017-11-24 重庆市商顺换热设备有限公司 A kind of industrial fermentation waste gas dehumanization method and device
CN111895442A (en) * 2019-05-06 2020-11-06 重庆市商顺换热设备有限公司 Flue gas treatment system of power plant
CN112097287A (en) * 2019-06-17 2020-12-18 王键 Boiler energy-saving and flue gas whitening system, process and application

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153446A (en) * 1960-08-12 1964-10-20 United Aircraft Corp Heat exchanger
GB2032611A (en) * 1978-10-05 1980-05-08 Fiat Ricerche Heat exchanger
EP0123653A1 (en) * 1983-04-22 1984-10-31 Kurier Holding AG Static heat exchanger with high efficiency in particular suitable for the cooling of viscous fluids
WO1996017672A1 (en) * 1994-12-09 1996-06-13 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and installation for treating a medium
US5845703A (en) * 1996-03-14 1998-12-08 Nir; Ari Heat recovery system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1012135A (en) * 1963-02-20 1965-12-08 Nat Res Dev Heat exchanger
IL55047A0 (en) * 1977-07-22 1978-08-31 Carrier Corp Heat exchange system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3153446A (en) * 1960-08-12 1964-10-20 United Aircraft Corp Heat exchanger
GB2032611A (en) * 1978-10-05 1980-05-08 Fiat Ricerche Heat exchanger
EP0123653A1 (en) * 1983-04-22 1984-10-31 Kurier Holding AG Static heat exchanger with high efficiency in particular suitable for the cooling of viscous fluids
WO1996017672A1 (en) * 1994-12-09 1996-06-13 Nederlandse Organisatie Voor Toegepast-Natuurwetenschappelijk Onderzoek Tno Method and installation for treating a medium
US5845703A (en) * 1996-03-14 1998-12-08 Nir; Ari Heat recovery system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107376604A (en) * 2017-09-21 2017-11-24 重庆市商顺换热设备有限公司 A kind of industrial fermentation waste gas dehumanization method and device
CN111895442A (en) * 2019-05-06 2020-11-06 重庆市商顺换热设备有限公司 Flue gas treatment system of power plant
CN112097287A (en) * 2019-06-17 2020-12-18 王键 Boiler energy-saving and flue gas whitening system, process and application
CN112097287B (en) * 2019-06-17 2022-09-30 重庆鑫顺盛达科技有限公司 Boiler energy-saving and flue gas whitening system, process and application

Also Published As

Publication number Publication date
AU3579401A (en) 2001-09-12
EP1259773B1 (en) 2004-04-28
GB2359881A (en) 2001-09-05
EP1259773A1 (en) 2002-11-27
ATE265663T1 (en) 2004-05-15
DE60103026T2 (en) 2005-04-07
DE60103026D1 (en) 2004-06-03
GB0004935D0 (en) 2000-04-19

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