GB2158216A - Heat exchangers - Google Patents

Heat exchangers Download PDF

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Publication number
GB2158216A
GB2158216A GB08510399A GB8510399A GB2158216A GB 2158216 A GB2158216 A GB 2158216A GB 08510399 A GB08510399 A GB 08510399A GB 8510399 A GB8510399 A GB 8510399A GB 2158216 A GB2158216 A GB 2158216A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
tube portions
apertures
coil
extrusion
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.)
Withdrawn
Application number
GB08510399A
Other versions
GB8510399D0 (en
Inventor
Fook Chong Chai
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
Publication of GB8510399D0 publication Critical patent/GB8510399D0/en
Publication of GB2158216A publication Critical patent/GB2158216A/en
Withdrawn legal-status Critical Current

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
    • F28F1/12—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
    • F28F1/14—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 longitudinally
    • F28F1/22—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 longitudinally the means having portions engaging further tubular elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S90/00—Solar heat systems not otherwise provided for
    • F24S90/10—Solar heat systems not otherwise provided for using thermosiphonic circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F25B1/06—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure
    • F25B1/08—Compression machines, plants or systems with non-reversible cycle with compressor of jet type, e.g. using liquid under pressure using vapour under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
    • F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/272—Solar heating or cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

An extruded heat exchanger element is disclosed which has parallel tubular portions (12) and interconnecting web portions (14) extending therebetween. Apertures (18) may be punched in the webs with the punched pieces forming bridges across the apertures. Thus liquid or gas can flow through the apertures and turbulence is caused by the bridges. <IMAGE>

Description

1 GB 2 158 216A 1
SPECIFICATION
Heat exchangers The present invention relates to a heat ex- 70 changer element and a heat exchanger includ ing such an element.
A known heat exchanger element used, for example, for heating or cooling rooms in buildings is fabricated from copper tubing and mechanically bonded aluminium fins. The first aspect of the present invention seeks to pro vide a high performance heat exchanger ele ment which is simpler and more economical to produce than the known elements.
According to one aspect of the invention, there is provided a heat exchanger element comprising an extrusion, the extrusion provid ing a plurality of generally parallel tube por tions and extending between the or each adjacent pair of tube portions an interconnect ing web portion. The extrusion may also pro vide a wing web portion extending from each of the outer tube portions on the opposite side thereof to the respective interconnecting web portion.
Thus, the problem in the known elements of mechanically bonding the fins to the tubes is eliminated, because the whole element is a long continuous single extrusion. Furthermore, the element will have good thermal conductiv ity because the webs or fins and the tube portions are integral.
The web portions are preferably punched to form a plurality of apertures therethrough, the 100 punched portions of each fin remaining con nected to the fin at opposed ends thereof to form a bridge across the aperture. Thus the surface area of the fins is increased to provide better heat exchange. Furthermore, the liquid or gas around the element can flow through the apertures to improve heat exchange. The connection of the punched bridging portions at both ends to the fins assists further in the heat exchange and, moreover, the bridging portions cause turbulance in the liquid or gas passing through the apertures to assist in the heat transfer.
According to a second aspect of the present invention, there is provided a heat exchanger comprising an element according to the first aspect of the invention, and means for con necting the tube portions in a heat transfer circuit, the element being curved to form at least about one turn of a coil with the tube portions extending around the coil, and means being provided to force air through the aper tures punched through the web portions.
A plurality of such heat exchangers may be used in a cooling apparatus disclosed in U.K.
Patent Application No. 8410634.
There follows a description, by way of example, of a specific embodiment of the present invention, reference being made to the accompanying drawings in which: 130 Figure 1 is an end view of a heat exchanger element according to the invention; Figure 2 is a partial perspective view of the heat exchanger element; Figure 3 is an enlarged view of part of the heat exchanger element; Figure 4 is a view of an element used in a heat exchanger according to the present in vention; and Figure 5 is a view of the heat exchanger; Referring to Fig. 1, an extrusion 10 of aluminium consists of two parallel tubular portions 12 which are joined by a thin flat web 14 at their closest proximity. Another two thin flat webs 16 of half the width of the webs 14 are formed as wings on the two tubular portions 12 and project therefrom in the same plane as the web 14. The extrusion 10 is punched in a power press to form two rows of slits 18 in the central web 14 and a row of slits 18 in each of the outer webs 16. The slits are not punched right through by the press, and the punching forms a bridging portion 20 extending between the opposite ends of each slit, as shown in Fig. 3.
It will be apparent that the heat exchanger element may be provided with far more than two tubular portions 12.
Referring to Figs. 4 and 5, there is shown a heat exchanger 20 which employs an element of the general type described with reference to Figs. 1 to 3. In this case, the element is curved along lines at right angles to the tubular portions so that it forms a coil 22, each tubular portion extending around the coil. The ends of the tubular portions at the inner end of the coil are interconnected, and the other ends are connected into a refrigeration or heating circuit. The heat exchanger coil is mounted within a cabinet 24, and an electrically driven fan 26 is mounted in the middle of the coil 22 to force air through the slits 18 in the heat exchanger element.

Claims (7)

1. A heat exchanger element comprising an extrusion, the extrusion providing a plurality of generally parallel tube portions and extending between the or each adjacent pair of tube portions an interconnecting web portion.
2. A heat exchanger element as claimed in Claim 1, wherein the extrusion also provides a wing web portion extending from each of the outer tube portions on the opposite side thereof to the respective interconnecting web portion.
3. A heat exchanger element as claimed in Claim 1 or 2, wherein the web portions are punched to form a plurality of apertures therethrough and in such a way as to increase the surface area thereof.
4. A heat exchanger element as claimed in Claim 3, wherein the apertures are formed as slits, a pair of opposite edges of each slit 2 GB 2 158 216A 2 being connected by a curved bridging portion formed by said punching.
5. A heat exchanger comprising an element as claimed in any of Claims 3 or 4, and means for connecting the tube portions in a heat transfer circuit, the element being curved to form at least about one turn of a coil with the tube portions extending around the coil, and means being provided to force air through the apertures.
6. A heat exchanger as claimed in Claim 5, wherein said air forcing means comprises a fan mounted within the coil.
7. A heat exchanger as claimed in Claim 5 and substantially as hereinbefore described with reference to and as illustrated in Figs. 1 to 5 of the accompanying drawings.
Printed in the United Kingdom for Her Majesty's Stationery Office, Dd 8818935. 1985, 4235. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 'I AY, from which copies may be obtained.
GB08510399A 1984-04-26 1985-04-24 Heat exchangers Withdrawn GB2158216A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08410634A GB2158215A (en) 1984-04-26 1984-04-26 Cooling plant

Publications (2)

Publication Number Publication Date
GB8510399D0 GB8510399D0 (en) 1985-05-30
GB2158216A true GB2158216A (en) 1985-11-06

Family

ID=10560097

Family Applications (3)

Application Number Title Priority Date Filing Date
GB08410634A Withdrawn GB2158215A (en) 1984-04-26 1984-04-26 Cooling plant
GB08510400A Withdrawn GB2158220A (en) 1984-04-26 1985-04-24 Apparatus and method for cooling
GB08510399A Withdrawn GB2158216A (en) 1984-04-26 1985-04-24 Heat exchangers

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB08410634A Withdrawn GB2158215A (en) 1984-04-26 1984-04-26 Cooling plant
GB08510400A Withdrawn GB2158220A (en) 1984-04-26 1985-04-24 Apparatus and method for cooling

Country Status (2)

Country Link
AU (1) AU4166885A (en)
GB (3) GB2158215A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU86434A1 (en) * 1986-05-22 1987-06-26 Euratom DEVICE FOR PASSIVE HEAT TRANSFER
AT410966B (en) * 2001-03-16 2003-09-25 Bammer Peter DEVICE FOR COMPRESSING A GAS BY MEANS OF SOLAR ENERGY AND / OR AMBIENT HEAT
BR0211048A (en) 2001-05-01 2004-07-20 Julian Romero-Beltran Tube and Plate Type Heat Exchanger
AU2002351677A1 (en) * 2001-11-29 2003-06-17 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Method and installation for solar thermal cooling

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB803759A (en) * 1955-11-24 1958-10-29 Gen Electric Co Ltd Improvements in or relating to refrigerator condensers
GB804636A (en) * 1956-07-27 1958-11-19 Serck Radiators Ltd Tubular elements for heat exchange apparatus
GB1037216A (en) * 1962-03-08 1966-07-27 Babcock & Wilcox Ltd Improvements in or relating to tubular heat exchangers
GB1176473A (en) * 1966-01-31 1970-01-01 Ernest Horace Priest Heat Exchanger and Heat Exchange Element therefor
GB1311998A (en) * 1969-05-22 1973-03-28 Schoell G Heat exchanger components
GB1484648A (en) * 1974-05-03 1977-09-01 Ford Motor Co Method of manufacturing a heater head assembly for a hot gas engine
GB2010466A (en) * 1977-12-14 1979-06-27 Fulton Ltd Heat Exchanger
GB1558836A (en) * 1976-01-22 1980-01-09 Ostbo John D B Heat exchanger
GB2044909A (en) * 1979-03-05 1980-10-22 Bio Energy Systems Inc Tube mat heat exchanger
US4266603A (en) * 1978-01-25 1981-05-12 Bbc Brown, Boveri & Co., Ltd. Heat exchangers and method
EP0097905A2 (en) * 1982-06-24 1984-01-11 COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite: Water-air convector with chimney effect for space-heating, and method of producing such a convector
GB2144204A (en) * 1983-07-27 1985-02-27 British Alcan Aluminium Ltd Heating boilers

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR428064A (en) * 1910-12-09 1911-08-22 Deutsche Waffen & Munitionsfab Device for ejecting cartridge cases in automatic firearms
GB208171A (en) * 1922-12-11 1925-02-26 Tito Romagnoli Solar heat actuated pumping unit
GB1129371A (en) * 1965-01-05 1968-10-02 Campbell Gifford & Morton Ltd Improvements in or relating to the conversion of solar energy to mechanical energy
GB1100308A (en) * 1965-07-26 1968-01-24 Ralph Cortez Schlichtig Ejector type refrigeration system
GB1298146A (en) * 1970-08-04 1972-11-29 Marlo Spa Improvements in or relating to ejector refrigerating systems
AU500756B2 (en) * 1975-05-05 1979-05-31 P. J. Hastwell Endothermic cooling system
FR2386781A1 (en) * 1977-04-06 1978-11-03 Messier Sa METHOD AND DEVICE FOR CONTROL OF THE CLIMATE ENVIRONMENT OF AN UNDERGROUND ENCLOSURE, CONTAINING A SOURCE OF PARASITIC CALORIES
US4246885A (en) * 1978-04-24 1981-01-27 Austin James W Solar energy compressor system
GB2044915A (en) * 1979-02-26 1980-10-22 Auger B Solar powered cooling system
US4246890A (en) * 1979-08-31 1981-01-27 Kraus Robert A Passive solar heater fluid pump system
JPS57500661A (en) * 1980-04-24 1982-04-15

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB803759A (en) * 1955-11-24 1958-10-29 Gen Electric Co Ltd Improvements in or relating to refrigerator condensers
GB804636A (en) * 1956-07-27 1958-11-19 Serck Radiators Ltd Tubular elements for heat exchange apparatus
GB1037216A (en) * 1962-03-08 1966-07-27 Babcock & Wilcox Ltd Improvements in or relating to tubular heat exchangers
GB1176473A (en) * 1966-01-31 1970-01-01 Ernest Horace Priest Heat Exchanger and Heat Exchange Element therefor
GB1311998A (en) * 1969-05-22 1973-03-28 Schoell G Heat exchanger components
GB1484648A (en) * 1974-05-03 1977-09-01 Ford Motor Co Method of manufacturing a heater head assembly for a hot gas engine
GB1558836A (en) * 1976-01-22 1980-01-09 Ostbo John D B Heat exchanger
GB2010466A (en) * 1977-12-14 1979-06-27 Fulton Ltd Heat Exchanger
US4266603A (en) * 1978-01-25 1981-05-12 Bbc Brown, Boveri & Co., Ltd. Heat exchangers and method
GB2044909A (en) * 1979-03-05 1980-10-22 Bio Energy Systems Inc Tube mat heat exchanger
EP0097905A2 (en) * 1982-06-24 1984-01-11 COMPAGNIE GENERALE D'ELECTRICITE Société anonyme dite: Water-air convector with chimney effect for space-heating, and method of producing such a convector
GB2144204A (en) * 1983-07-27 1985-02-27 British Alcan Aluminium Ltd Heating boilers

Also Published As

Publication number Publication date
GB8410634D0 (en) 1984-05-31
GB8510399D0 (en) 1985-05-30
GB8510400D0 (en) 1985-05-30
GB2158220A (en) 1985-11-06
GB2158215A (en) 1985-11-06
AU4166885A (en) 1985-10-31

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)