EP0066425A2 - Wärmetauscher - Google Patents

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Info

Publication number
EP0066425A2
EP0066425A2 EP82302589A EP82302589A EP0066425A2 EP 0066425 A2 EP0066425 A2 EP 0066425A2 EP 82302589 A EP82302589 A EP 82302589A EP 82302589 A EP82302589 A EP 82302589A EP 0066425 A2 EP0066425 A2 EP 0066425A2
Authority
EP
European Patent Office
Prior art keywords
tubes
heat exchanger
conduit
casing
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.)
Withdrawn
Application number
EP82302589A
Other languages
English (en)
French (fr)
Other versions
EP0066425A3 (de
Inventor
Kevin John Sulzberger
Terrance Frank Soffe
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.)
New Zealand Dairy & Industrial Supplies Ltd
Original Assignee
New Zealand Dairy & Industrial Supplies Ltd
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
Priority claimed from NZ19717281A external-priority patent/NZ197172A/xx
Application filed by New Zealand Dairy & Industrial Supplies Ltd filed Critical New Zealand Dairy & Industrial Supplies Ltd
Publication of EP0066425A2 publication Critical patent/EP0066425A2/de
Publication of EP0066425A3 publication Critical patent/EP0066425A3/de
Withdrawn legal-status Critical Current

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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
    • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
    • 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
    • F28D7/163—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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
    • F28D7/1638—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 with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one
    • 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

Definitions

  • This invention relates to a heat exchanger particularly designed for use with a refrigerant gas to remove heat therefrom into a suitable exchange fluid, normally a liquid.
  • Shell and tube heat exchangers are well known, and in the simplest form have an outer casing with a fluid plenum chamber at either end and a plurality of conduits carrying the fluid, normally a liquid such as water, from one chamber to the other.
  • a liquid inlet leads into one plenum chamber and a liquid outlet is provided from the other plenum chamber.
  • the medium from which heat is to be extracted for example a refrigerant gas, is passed through the body of the casing with the inlet for the gas usually at the end remote from the outlet to cause the gas to move along the body over the tubes and thus effect the heat exchange.
  • One object of the present invention is to ensure that the volume and space factors of the shell and tube heat exchanger can be combined with the efficiencies normally available with the conventional single pass contra-flow heat exchanger.
  • the invention as claimed is intended to remedy some drawbacks of the known types and is concerned with features which make the heat exchanger safer, and in particular which avoid contamination of the liquid should there be a failure in the tube carrying the liquid being heated. This is particularly necessary if the liquid is water and it is desired to maintain the apparatus to a standard where potable water is produced therefrom.
  • the present invention consists in a heat exchanger having an outer casing, end plates at each end of said outer casing, each said end plate incorporating a plurality of tube receiving apertures, a plurality of substantially parallel tubes, having their ends sealably engaged in the apertures and extending between said end plates, an entrance for a heat exchange gas to enter the casing and to pass over the tubes and an exit from the casing for said heat exchange gas, an end cap incorporating a fluid inlet mounted on one end plate to define a first plenum chamber and an end cap with a fluid outlet mounted on the other end plate to define a second plenum chamber, characterised in that the tubes are grouped together with a substantially equal number of tubes in each group and with baffles located between the groups of tubes with said baffles ported so that there is a single passage over the groups of tube between the gas inlet and gas outlet, and with baffles in the plenum chambers with the baffles arranged so that there is a single pass through the groups of tubes from the fluid inlet in one end
  • a heat exchanger 1 has a casing preferably made up as a cylindrical metal body section 2 engaged in metal end plate assemblies which will be described in detail hereunder and having fitted thereto end caps 3 and 4 which togetherwith the remaining end assembly define plenum chambers for a fluid to be used in the heat exchanger.
  • a fluid to be used in the heat exchanger.
  • the fluid will be described as water although it is to be understood that any acceptable heat exchange medium can be used in the present invention.
  • the end cap 4 incorporates a water inlet 19 and the end cap 3 a water outlet 20.
  • the water is carried between the plenum chambers in a plurality of tubes 5. These tubes extend through and have a sealed association with the end assembly so that water can be carried from the first plenum chamber to the second plenum chamber through the tubes.
  • each tube is a twin wall tube with the inner conduit of the tube formed from stainless steel and the outer conduit formed from copper.
  • the two tubes are associated one with other by a spiral groove wound in the tube.
  • the dimensions of the two tubes are selected in a manner such that there is a fluid path between the two tubes but the tubes are close enough particularly through the added association caused with the spiral grooving so that there is an acceptable heat exchange path through the walls of the tube.
  • the means by which the tube is associated with the end assembly is more particularly illustrated in figure 3.
  • the end assembly consists of a split end plate with the inner part of the plate 9 welded to the casing 2 and having apertures therethrough which will receive and form a sealable association with the outer copper tube 8 which is stopped short of passing through the section 9.
  • the outer part 10 of the end plate has apertures which sealably engage with the inner stainless steel conduit 6. In this case the stainless steel conduit would project slightly through the outer part 10.
  • the present invention may be improved if the venting passageway is protected where the tube engages with the end plates by forming a groove into the wall of the tube.
  • a normal construction technique would expand this tube into engagement with the end plates and such a supplementary groove which may for example be a spiral groove or a groove ensures that the venting or leak passage is preserved to achieve the function detailed above.
  • Other means of course can be employed provided the vent passage is maintained.
  • the grooves are formed in the softer material, that is the copper, as if the reverse is the case the copper will tend to flow and fill the grooves in the stainless steel during the manufacturing techniques where the tubes are expanded into the end plates.
  • the twin wall tube can also be formed having a protective or outer skin on the copper.
  • This construction is desirable in a medium hostile to copper, for example ammonia, which is a common refrigerant.
  • a thin wall outer casing of stainless steel for example having a thickness of for example .7 of a millimetre can be employed. This of course can be varied but it is sufficient for the purpose above outlined.
  • the outer skin of stainless steel is stopped at the point where the copper tube stops and otherwise the venting is achieved in a manner as above specified.
  • the conduits 5 are grouped together in groups of six triangularly arranged as is illustrated in figure 4. Each bundle or group of six tubes is confined within a triangular partition 12.
  • the triangular partitions are sized and shaped so that they fit neatly together within the casing 2.
  • the partitions are formed from folded metal which can be suitably joined and when the five sections are assembled complete what essentially finishes as a five sided cylinder.
  • the baffles are fixed together, for example, by welding and then have the end faces machined so that these faces will in use abut against the end plate assemblies previously described, minimising any leakage or bypass of the refrigerant between the different baffle sections. This configuration is able to be modified depending upon the shape of the outer casing and the number of passes required in the operation.
  • the partitions 12 included ports or openings so that the refrigerant gas is caused to have a single pass path through these partitions.
  • An inlet 13 allows the refrigerant gas to be introduced through the casing and into the first of the partitions 12.
  • the porting between the partitions causes the gas to flow backwards and forwards along the casing until it is final discharged through the gas outlet 14. More specifically the refrigerant between these two outlets moves along the partition indicated in the drawings b ⁇ - - numeral 15 to pass through a port or opening 16 into the partition identified by numeral 17 and so on until it has completed the single passage to be discharged from outlet 14.
  • the heat exchanger according to the present invention also has baffles located in the plenum chamber again maintaining the division corresponding with the grouping of conduits that are contained within the partitions or baffles located guiding the refrigerant gas.
  • the baffles which are used in the end plenum chambers to achieve this are illustrated in figures 5 and 6. In this way water which is passed through the water inlet 19 is caused to flow through one group of conduits 5 and by the division in the other plenum to come back on a path which is a contra-flow path to the path of the refrigerant as previously described, ultimately ,to be discharged from the water outlet as hot water.
  • baffles in the plenum chamber are fixed to the end caps as is illustrated in figures 5 and 6 and have been overlaid with the dotted outline of_ the partitions containing the groups of tubes so that the manner by which the water is caused to move across and then return back down the next set of conduits is illustrated.
  • the outer casing 2 is preferably sheathed in an appropriate layer of insulation 21 which can have a hard outer surface to give a decorative and aesthetically pleasing finish.
  • the heat exchanger is connected in use with the gas from which heat is to be removed for example refrigerant gas coupled to pass through the exchanger and hence on a single pass through the partitions 12 and over the walls of the tubes 5.
  • the water is also connected and has a single contra-flow passage, thus combining the advantages of the known contra-flow heat exchangers with the shell and tube heat exchangers while also incorporating the safety factor by minimising the likelihood of contaminating between the gas and water.
EP82302589A 1981-05-22 1982-05-20 Wärmetauscher Withdrawn EP0066425A3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ197172 1981-05-22
NZ19717281A NZ197172A (en) 1981-05-22 1981-05-22 Fixed tube sheet exchanger with at least three contraflow shell and tube passes
NZ19829181A NZ198291A (en) 1981-05-22 1981-09-07 Fixed tube sheet exchanger with at least three contraflow shell and tube passes
NZ198291 1981-09-07

Publications (2)

Publication Number Publication Date
EP0066425A2 true EP0066425A2 (de) 1982-12-08
EP0066425A3 EP0066425A3 (de) 1983-06-22

Family

ID=26650473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302589A Withdrawn EP0066425A3 (de) 1981-05-22 1982-05-20 Wärmetauscher

Country Status (3)

Country Link
EP (1) EP0066425A3 (de)
AU (1) AU8382882A (de)
NZ (1) NZ198291A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120497A2 (de) * 1983-03-28 1984-10-03 Tui Industries Gehäuse- und Röhrenwärmetauscher
EP0245465A1 (de) * 1985-11-05 1987-11-19 Tui Industries Wärmerohrtauscher
US4773231A (en) * 1987-01-15 1988-09-27 Tui Industries System for preheating water using thermal energy from refrigerant system
US4858681A (en) * 1983-03-28 1989-08-22 Tui Industries Shell and tube heat exchanger
US4871014A (en) * 1983-03-28 1989-10-03 Tui Industries Shell and tube heat exchanger
US4870734A (en) * 1987-04-03 1989-10-03 Tui Industries Method of manufacturing high efficiency heat exchange tube
US6639109B1 (en) 1999-09-28 2003-10-28 Nihon Nohyaku Co., Ltd. Process for production of thioalkylamine derivatives
WO2007030856A1 (en) * 2005-09-16 2007-03-22 Dux Manufacturing Limited A heat exchanger element and a water heater and heat pump utilising same
CN107470049A (zh) * 2017-09-30 2017-12-15 江西远达环保有限公司 具有防汽化作用的脱硫脱硝用喷枪管
CN107470050A (zh) * 2017-09-30 2017-12-15 江西远达环保有限公司 具冷却效果的脱硫脱硝用喷枪
CN107883791A (zh) * 2017-11-10 2018-04-06 清华大学 用于变工况的换热装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260066A (en) * 1925-08-12 1926-10-28 Emilio Storoni Heat exchange apparatus
DE1501531A1 (de) * 1965-09-22 1969-09-11 Kabel Metallwerke Ghh Waermeaustauscherrohr und Waermeaustauscher
US3566615A (en) * 1969-04-03 1971-03-02 Whirlpool Co Heat exchanger with rolled-in capillary for refrigeration apparatus
DE2111387A1 (de) * 1971-03-03 1972-09-07 Karl Fischer App U Rohrleitung Rohrbuendel-Waermeaustauscher
FR2186120A5 (de) * 1972-05-26 1974-01-04 Nalet Jean
DE2320125A1 (de) * 1973-04-19 1974-10-24 Spiral Tubing Corp Verfahren zur herstellung einer rohreinheit
FR2347642A1 (fr) * 1976-04-09 1977-11-04 France Etat Echangeur thermique a elements tubulaires et procede de fabrication
FR2383418A1 (fr) * 1977-03-07 1978-10-06 Ecodyne Corp Echangeur de chaleur a nombre de passages variables

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB260066A (en) * 1925-08-12 1926-10-28 Emilio Storoni Heat exchange apparatus
DE1501531A1 (de) * 1965-09-22 1969-09-11 Kabel Metallwerke Ghh Waermeaustauscherrohr und Waermeaustauscher
US3566615A (en) * 1969-04-03 1971-03-02 Whirlpool Co Heat exchanger with rolled-in capillary for refrigeration apparatus
DE2111387A1 (de) * 1971-03-03 1972-09-07 Karl Fischer App U Rohrleitung Rohrbuendel-Waermeaustauscher
FR2186120A5 (de) * 1972-05-26 1974-01-04 Nalet Jean
DE2320125A1 (de) * 1973-04-19 1974-10-24 Spiral Tubing Corp Verfahren zur herstellung einer rohreinheit
FR2347642A1 (fr) * 1976-04-09 1977-11-04 France Etat Echangeur thermique a elements tubulaires et procede de fabrication
FR2383418A1 (fr) * 1977-03-07 1978-10-06 Ecodyne Corp Echangeur de chaleur a nombre de passages variables

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120497A2 (de) * 1983-03-28 1984-10-03 Tui Industries Gehäuse- und Röhrenwärmetauscher
EP0120497A3 (en) * 1983-03-28 1985-10-23 Tui Industries Inc. Shell and tube heat exchanger
EP0259895A1 (de) * 1983-03-28 1988-03-16 Tui Industries Rohrbündelwärmetauscher
US4858681A (en) * 1983-03-28 1989-08-22 Tui Industries Shell and tube heat exchanger
US4871014A (en) * 1983-03-28 1989-10-03 Tui Industries Shell and tube heat exchanger
EP0245465A1 (de) * 1985-11-05 1987-11-19 Tui Industries Wärmerohrtauscher
EP0245465A4 (de) * 1985-11-05 1988-04-18 Tui Ind Wärmerohrtauscher.
US4773231A (en) * 1987-01-15 1988-09-27 Tui Industries System for preheating water using thermal energy from refrigerant system
US4870734A (en) * 1987-04-03 1989-10-03 Tui Industries Method of manufacturing high efficiency heat exchange tube
US6639109B1 (en) 1999-09-28 2003-10-28 Nihon Nohyaku Co., Ltd. Process for production of thioalkylamine derivatives
WO2007030856A1 (en) * 2005-09-16 2007-03-22 Dux Manufacturing Limited A heat exchanger element and a water heater and heat pump utilising same
CN107470049A (zh) * 2017-09-30 2017-12-15 江西远达环保有限公司 具有防汽化作用的脱硫脱硝用喷枪管
CN107470050A (zh) * 2017-09-30 2017-12-15 江西远达环保有限公司 具冷却效果的脱硫脱硝用喷枪
CN107470049B (zh) * 2017-09-30 2023-04-18 江西远达环保有限公司 具有防汽化作用的脱硫脱硝用喷枪管
CN107470050B (zh) * 2017-09-30 2023-04-18 江西远达环保有限公司 具冷却效果的脱硫脱硝用喷枪
CN107883791A (zh) * 2017-11-10 2018-04-06 清华大学 用于变工况的换热装置

Also Published As

Publication number Publication date
AU8382882A (en) 1982-11-25
NZ198291A (en) 1984-10-19
EP0066425A3 (de) 1983-06-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): BE DE FR GB NL

PUAL Search report despatched

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Effective date: 19831229

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Effective date: 19831219

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Effective date: 19840809

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SULZBERGER, KEVIN JOHN

Inventor name: SOFFE, TERRANCE FRANK