EP0553238B1 - Spiralenförmiger wärmetauscher - Google Patents

Spiralenförmiger wärmetauscher Download PDF

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Publication number
EP0553238B1
EP0553238B1 EP91919518A EP91919518A EP0553238B1 EP 0553238 B1 EP0553238 B1 EP 0553238B1 EP 91919518 A EP91919518 A EP 91919518A EP 91919518 A EP91919518 A EP 91919518A EP 0553238 B1 EP0553238 B1 EP 0553238B1
Authority
EP
European Patent Office
Prior art keywords
spiral
channels
channel
heat exchanger
medium
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.)
Expired - Lifetime
Application number
EP91919518A
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English (en)
French (fr)
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EP0553238A1 (de
Inventor
Leonardus Wouter Koot
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Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Application filed by Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO filed Critical Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Publication of EP0553238A1 publication Critical patent/EP0553238A1/de
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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
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/04—Constructions of heat-exchange apparatus characterised by the selection of particular materials of ceramic; of concrete; of natural stone
    • 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
    • F28D7/022—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 the conduits of two or more media in heat-exchange relationship being helically coiled, the coils having a cylindrical configuration

Definitions

  • the invention relates to a spiral heat exchanger provided with a central straight cylindrical channel inside which a first medium can flow through, and a channel which runs as a spiral around the cylinder axis and through which a second medium can flow.
  • a spiral heat exchanger of this type is disclosed in DE-3519315 A1.
  • a channel in spiral form through which a second medium flows is provided inside the cylindrical casing through which a first medium flows.
  • This heat exchanger is usually used in a central heating circuit in which the exhaust gases flow out of the heating boiler through the casing and in part release heat to the return water flowing through the spiral channel, which yields a saving in fuel consumption.
  • the spiral channel is double-wound so that inlet and outlet are on one side of the cylindrical casing. A problem with this heat exchanger is the relatively moderate heat transfer.
  • heat exchangers of compact size have now been found to be of great importance, on the one hand in connection with the lack of space under certain process conditions and, on the other hand, in connection with the advantageous specific power (kW/m 3 ) of such a heat exchanger for a specific temperature difference between the media and the low specific cost price per square meter of heat-exchanging surface which is possible as a consequence.
  • kW/m 3 the advantageous specific power of such a heat exchanger for a specific temperature difference between the media and the low specific cost price per square meter of heat-exchanging surface which is possible as a consequence.
  • applications have emerged for which it was found necessary to have a heat exchanger of small dimensions in which several media flows can exchange heat with one another.
  • the aim of the invention is to overcome the above-mentioned problems and to provide a compact heat exchanger in which the heat transfer is particularly high and with which, as a consequence of the dimensions, a modular construction of a plurality of these heat exchangers is simple to achieve.
  • a heat exchanger having one spiral channel on which in alternating manner an additional spiral channel is formed by plate pieces which are welded to the first channel.
  • the channel formed by the space surrounded by the spiral channels is open at both sides and has a diameter which is a factor five bigger than that of the spiral channels. Because the two spiral channels, apart from the plate pieces, have one shared wall, there is no possibility of using material of good thermal conductivity which could fill in completely the spaces between those two spiral channels as is the case in present invention.
  • Said two spiral channels are used for cooling or heating of food products, liquids and/or gasses fed in counter current only through the spiral channels.
  • a heat exchanger having two spiral-like channels placed on top of each other in juxtaposion around a cylindrical winding core, which channels each time are arranged in the same transfer plane with respect to the cylindrical core.
  • Said cylindrical core serves to support the spiral channels and is thermically isolated from the two spiral-like channels by the use of PVC material forming the wall of the core.
  • the central core serves to support the spiral channels and does not have any heat transfer role.
  • the central core has a diameter about ten times the diameter of the spiral channels.
  • Said heat exchanger is used for cooling and/or heating of two media in counter current only in said two spiral channels.
  • a thermal conducting substance is partially and locally provided between the juxtaposed wall portions during pressuration, after which it is squeezed out partially and remains in place like is indicated in figure 3. Furthermore a method is described for producing and specifically deforming the contacting walls of said two spiral channels.
  • Figure 1 gives a view of the compact exchanger 3 according to the invention with two spiral channels or pipes 1, 2, each of which alternately is wound directly around the straight cylindrical channel 4.
  • the cylindrical casing of the heat exchanger 6 can be made of insulating material.
  • each spiral pipe has sixteen windings around the straight pipe, as a result of which the total heat exchanger has a length of about 235 mm.
  • the heat exchanger according to the invention can advantageously be produced, for example, by winding two annealed red copper pipes, filled with sand, with a guide around a steel pin to form an assembly.
  • Each copper pipe for example, has an inner(di)- and outer(du) diameter of 4.6 mm and 6.35 mm respectively.
  • a straight red copper pipe having the same external diameter is inserted in the same place.
  • the entire assembly is then immersed in liquid tin or another liquid materials having good thermal conductivity.
  • the tin is subsequently melted again using a burner flue. By this means, any hollow cavities still present between the three pipes are completely filled by the liquid metal flowing in until full.
  • polyethylene can be applied as pipe insulation 6 around the entire assembly.
  • the heat flow density through the channel walls was calculated with the aid of the transferred power, which follows from the heat balance and the internal surface area of the various channels.
  • a calculation example is given below, while all calculated heat transfer coefficients for the media water/water (2130 to 22624 W/m 2 .K) are given in Table 1.
  • Table 1 shows the measurement results for the media water/water and Table 2 the measurement results for the media air/nitrogen vapour.
  • the thermal resistances can also show local differences as a consequence thereof.
  • the thermal resistance ⁇ / ⁇ of the total material thickness (copper + tin) was also calculated. This ⁇ / ⁇ was 20.4.10 -6 m 2 .K/W.
  • a number of these heat exchangers can advantageously be assembled in modular construction to form a larger matrix-type heat exchange unit.
  • a matrix-type heat exchange unit of this type a number of modules, each of which comprises a heat exchanger according to the invention, are joined to one another in rows and/or columns and connected to one another.
  • a heat exchange unit of this type can be produced, for example, by winding lead wires in a block of ceramic powder in accordance with the said channels of a single heat exchanger according to the invention. The said block of ceramic powder is subsequently baked, the lead wires melting away in each module. After cooling, the said three or more channels remain in the ceramic material in each module of the exchange unit.
  • a heat exchange unit of this type can advantageously be used for applications using flow-through media for elevated temperatures, for example above 1000°C.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Claims (10)

  1. Wendelwärmetauscher (3), der versehen ist mit einem mittleren geraden, zylindrischen Kanal (4), innerhalb dessen ein erstes Medium hindurchfließen kann, einem Kanal (1), der als eine Wendel um die Zylinderachse herumläuft und durch den ein zweites Medium fließen kann, und zusätzlich zu dem einen Wendelkanal (1) und in jedem Fall abwechselnd damit mindestens ein zusätzlicher Wendelkanal (2) durch den ein drittes Medium fließen kann, worin die zwei Wendelkanäle, die die gleiche zylindrische Form aufweisen, unmittelbar, nebeneinander um den geraden, zylindrischen Kanal gewickelt sind, wobei die mindestens drei Kanäle Durchmesser haben, die ungefähr die gleichen sind, wobei sich ein kleiner Krümmungsradius der Wendelkanäle ergibt, und worin mindestens die zwei Wendelkanäle jeweils eine Metallwand guter Wärmeleitfähigkeit haben, alle Räume zwischen den Wänden der zwei Wendelkanäle und um jene herum vollständig gefüllt sind, indem man ein Material (5) guter Wärmeleitfähigkeit hineinfließen läßt, wodurch ein umfangsmäßiger Wärmeübertragung der Kanäle ermöglicht wird.
  2. Wendelwärmetauscher (3) gemäß Anspruch 1, dadurch gekennzeichnet, daß die Wand um den geraden Kanal (4) herum durch die Wände der Wendelkanäle und das Füllmaterial (5) zwischen ihnen gebildet ist.
  3. Wendelwärmetauscher (3) gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Einlaß- und Auslaßenden der zwei Wendelkanäle (1, 2) an der einen kurzen Seite oder der anderen kurzen Seite des Wärmetauschers so gebogen sind, daß sie parallel zu dem geraden Kanal (4) sind.
  4. Wendelwärmetauscher (3) gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Außendurchmesser von jedem Kanal ungefähr 6,4 mm ist, daß der Außendurchmesser der Wendel ungefähr 19,2 mm ist und daß die Längsabmessung des zylindrischen Gehäuses ungefähr 235 mm ist.
  5. Wendelwärmetauscher (3) gemäß Anspruch 1, dadurch gekennzeichnet, daß die genannten Kanäle (1, 2, 4) aus ausgeglühtem, rotem Kupfer hergestellt sind und daß das Füllmaterial (5) Zinn ist.
  6. Verfahren zur Herstellung eines Wendelwärmetauschers (3) gemäß einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zwei ausgeglühte Metallkanäle, die mit Sand gefüllt sind, um einen Stahlstift gewickelt werden, um einen Zusammenbau zu bilden, wobei der Stift dann durch einen geraden Metallkanal ersetzt wird, der den gleichen Außendurchmesser wie der Stift hat, und daß der Zusammenbau in flüssiges Füllmaterial getaucht wird, wobei Abkühlen nach dem Entfernen daraus stattfindet.
  7. Verfahren gemäß Anspruch 6, dadurch gekennzeichnet, daß das flüssige Füllmaterial nachfolgend erneut unter Verwendung eines Brenners geschmolzen wird, woraufhin Abkühlen stattfindet.
  8. Matrix-Wärmetauschereinheit, die aus Modulen konstruiert ist, von denen jeder durch einen Wendelwärmetauscher (3) gemäß Anspruch 1 gebildet ist.
  9. Matrix-Wärmetauschereinheit gemäß Anspruch 8, die aus einem homogenen Block aus Keramikmaterial besteht, in dem an der Stelle der Module drei Kanäle durch das Keramikmaterial hindurchqehen, das eine gute Wärmeleitfähigkeit aufweist und als Kanaltrennung dient.
  10. Verfahren zur Erzeugung einer Matrix-Wärmetauschereinheit gemäß Anspruch 9, bei dem Bleidrähte in einen Block aus Keramikpulver nach Maßgabe der genannten Kanäle gewunden werden und der die Drähte enthaltende Block dann gebrannt wird, wobei die drei Kanäle in jedem Modul in dem Keramikmaterial zurückbleiben, nachdem das Blei fortgeschmolzen ist.
EP91919518A 1990-10-16 1991-10-16 Spiralenförmiger wärmetauscher Expired - Lifetime EP0553238B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL9002251A NL9002251A (nl) 1990-10-16 1990-10-16 Spiralen-warmtewisselaar.
NL9002251 1990-10-16
PCT/NL1991/000205 WO1992007226A1 (en) 1990-10-16 1991-10-16 Spiral heat exchanger

Publications (2)

Publication Number Publication Date
EP0553238A1 EP0553238A1 (de) 1993-08-04
EP0553238B1 true EP0553238B1 (de) 1997-01-22

Family

ID=19857833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91919518A Expired - Lifetime EP0553238B1 (de) 1990-10-16 1991-10-16 Spiralenförmiger wärmetauscher

Country Status (7)

Country Link
EP (1) EP0553238B1 (de)
JP (1) JP3122464B2 (de)
AT (1) ATE148219T1 (de)
DE (1) DE69124391T2 (de)
DK (1) DK0553238T3 (de)
NL (1) NL9002251A (de)
WO (1) WO1992007226A1 (de)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352784A (en) * 1993-07-15 1994-10-04 Minnesota Mining And Manufacturing Company Fused cycloalkylimidazopyridines
DK0708772T3 (da) * 1993-07-15 2000-09-18 Minnesota Mining & Mfg Imidazo[4,5,-c]pyridin-4-aminer
US5648516A (en) * 1994-07-20 1997-07-15 Minnesota Mining And Manufacturing Company Fused cycloalkylimidazopyridines
US5644063A (en) * 1994-09-08 1997-07-01 Minnesota Mining And Manufacturing Company Imidazo[4,5-c]pyridin-4-amine intermediates
EP0867678A1 (de) * 1997-03-26 1998-09-30 Artur Zachajewicz Multikoaxialer Rohrwärmetauscher
EP1632277A1 (de) 2004-09-03 2006-03-08 Nederlandse Organisatie voor toegepast-natuurwetenschappelijk Onderzoek TNO Verfahren und Vorrichtung für Kristallsation
US8721981B2 (en) 2009-11-30 2014-05-13 General Electric Company Spiral recuperative heat exchanging system
DE102010007249A1 (de) 2010-02-09 2011-08-11 Went, Tilo, 53474 Wärmetauscher, Kondensator
EP2404666A1 (de) 2010-07-09 2012-01-11 Rhodia Opérations Modul zur kontinuierlichen Umwandlung mindestens eines flüssigen Produkts, entsprechende Einheit und entsprechendes Verfahren
WO2011117540A1 (fr) 2010-03-23 2011-09-29 Rhodia Operations Module de transformation continue d'au moins un produit fluide, unité et procédé associés
CN105277022A (zh) * 2015-11-30 2016-01-27 李家海 管管交缠式热交换器
CN109496261B (zh) 2016-06-09 2020-12-08 流体处理有限责任公司 3d螺旋热交换器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE203759C (de) * 1907-12-24 1908-10-29
SE441302B (sv) * 1980-05-27 1985-09-23 Euroheat Ab Trekretsvermevexlare med spirallindade ror i en stapel
US4316502A (en) * 1980-11-03 1982-02-23 E-Tech, Inc. Helically flighted heat exchanger
FR2549215B1 (fr) * 1983-07-11 1988-06-24 Produits Refractaires Echangeurs de chaleur moules en matiere refractaire
DE3519315A1 (de) * 1985-05-30 1986-12-04 kabelmetal electro GmbH, 3000 Hannover Waermetauscher aus einem huellrohr und einem im innern des huellrohres angeordneten wendelartig verlaufenden rohr

Also Published As

Publication number Publication date
DK0553238T3 (da) 1997-07-07
JP3122464B2 (ja) 2001-01-09
EP0553238A1 (de) 1993-08-04
WO1992007226A1 (en) 1992-04-30
JPH06502479A (ja) 1994-03-17
DE69124391T2 (de) 1997-08-21
DE69124391D1 (de) 1997-03-06
NL9002251A (nl) 1992-05-18
ATE148219T1 (de) 1997-02-15

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