EP0637723A1 - Austauschsvorrichtung zur Heizung eines zähflüssigen Fluidums - Google Patents

Austauschsvorrichtung zur Heizung eines zähflüssigen Fluidums Download PDF

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Publication number
EP0637723A1
EP0637723A1 EP94401761A EP94401761A EP0637723A1 EP 0637723 A1 EP0637723 A1 EP 0637723A1 EP 94401761 A EP94401761 A EP 94401761A EP 94401761 A EP94401761 A EP 94401761A EP 0637723 A1 EP0637723 A1 EP 0637723A1
Authority
EP
European Patent Office
Prior art keywords
external
internal
pipe
pipes
section
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
Application number
EP94401761A
Other languages
English (en)
French (fr)
Other versions
EP0637723B1 (de
Inventor
Michel Gorse
Bernard Creton
Hervé Rivoalen
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.)
Electricite de France SA
Original Assignee
Electricite de France SA
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 Electricite de France SA filed Critical Electricite de France SA
Publication of EP0637723A1 publication Critical patent/EP0637723A1/de
Application granted granted Critical
Publication of EP0637723B1 publication Critical patent/EP0637723B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
    • F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
    • F24H1/105—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance formed by the tube through which the fluid flows

Definitions

  • the invention relates to the heating of viscous fluids circulating in an annular space heated by the Joule effect.
  • An application is planned for the heating and sterilization of certain agro-food products.
  • the thermal profile in established regime has a parabolic shape.
  • the viscous fluid has a temperature close to that of the wall and at the heart of the flow, the temperature may be several tens of degrees lower. This temperature heterogeneity is incompatible with quality heat treatment (such as the sterilization of an agrifood product).
  • tubular exchangers composed of three concentric tubes, with a circulation of thermal fluid on either side of the fluid to be heated.
  • the implementation of such devices remains complex.
  • these devices have all the disadvantages of heat exchangers.
  • the object of the invention is to remedy these drawbacks by proposing an exchanger device for heating a viscous fluid in a pipe, but of a different design.
  • the heating means consist in energizing the two pipes in parallel.
  • the holding means are fins fixed longitudinally between the two pipes.
  • the fins are used by three and are placed radially at 120 ° from each other.
  • these fins have an electrical resistance much lower than that of the internal pipe.
  • each section comprising an internal pipe and an external pipe and at each end an electrical connection piece perpendicular to the external surface of the external pipe.
  • the external pipe is reinforced by a sleeve to support each connection piece and avoid local overheating of the external pipe.
  • the device according to the invention can take two different general forms.
  • a first consists of several sections of pipes connected in series, each section comprising an internal pipe, an external pipe and two electrical connection pieces.
  • the sections are connected to each other by means of elbows.
  • each section comprising an internal pipe and an external pipe; an electrical connection piece is placed at each end of the device.
  • a section of the device according to the invention mainly comprises an internal pipe 1 and an external pipe 2. These two pipes 1 and 2 are mounted concentric, that is to say that they have the same positioning axis 6.
  • the internal pipe 1 defines an internal space 4 which will remain empty when the device is used.
  • the annular space 3 comprised between the internal 1 and external 2 pipes is that in which the viscous fluid to be heated circulates. The horizontal arrows symbolize the passage of this fluid between the two walls of this annular space 3.
  • radial fins 5 are used which are arranged longitudinally between the two pipes.
  • it is a group of three fins 5 which is represented, each arranged angularly with respect to each other, at 120 ° around the longitudinal axis 6 of the section. They are welded to the internal wall 1 and to the external wall 2.
  • the electrical connection of a section is made using at least one electrical connection piece 7 fixed to the external pipe 2.
  • a sleeve 8 fixed around, or replacing the external pipe. 2, as shown in FIG. 1.
  • the sleeve 8 has an internal diameter corresponding to the internal diameter of the external pipe 2.
  • the fins 5 also ensure the passage of electric current from the external pipe into the internal pipe 1. As a result, the internal 1 and external 2 pipes are electrically connected in parallel. To obtain a good distribution of the electric current in the section, the fins 5 must have an electrical resistance much lower than that of internal pipe 1.
  • This device therefore has the advantage of having only a reduced temperature difference between the fluid close to the walls and the fluid located far from the walls of the pipes. There is also a reduction in the temperature difference between the walls of the internal 1 and external 2 pipes and the fluid, this reduction being linked to the decrease in the heat flux density.
  • the device also has certain advantages, such as the absence of inertia in operation and precise control of the temperature difference between the walls and the viscous fluid. In addition, no electrical insulation is required in this device.
  • a first embodiment of the exchanger device is an assembly of several sections mounted in series. Each section has at its two ends 10A and 10B a connecting piece 7 to obtain the passage of current in the two pipes of the section 10.
  • Each second end 10B of a section is connected to one end 10A of a following section by means an elbow 11 which, for its part, is not traversed by the electric current.
  • the end 10B of the last section 10 N is not connected to an elbow, but constitutes the output of the device.
  • a second embodiment of the device according to the invention consists in mounting different sections 10 in parallel. Each section is connected to a viscous fluid supply 12 by its first end 10A. Each second end 10B of the sections 10 is connected to a fluid outlet 13. Each section 10 is of course equipped with connection pieces 7 so that the electric current can pass through the two internal and external pipes to heat the viscous fluid.
EP94401761A 1993-08-03 1994-08-01 Austauschvorrichtung zur Heizung eines zähflüssigen Fluidums Expired - Lifetime EP0637723B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9309551 1993-08-03
FR9309551A FR2708726B1 (fr) 1993-08-03 1993-08-03 Dispositif échangeur pour le chauffage d'un fluide visqueux.

Publications (2)

Publication Number Publication Date
EP0637723A1 true EP0637723A1 (de) 1995-02-08
EP0637723B1 EP0637723B1 (de) 1999-02-03

Family

ID=9449896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401761A Expired - Lifetime EP0637723B1 (de) 1993-08-03 1994-08-01 Austauschvorrichtung zur Heizung eines zähflüssigen Fluidums

Country Status (7)

Country Link
EP (1) EP0637723B1 (de)
AT (1) ATE176523T1 (de)
DE (1) DE69416357T2 (de)
DK (1) DK0637723T3 (de)
ES (1) ES2129601T3 (de)
FR (1) FR2708726B1 (de)
GR (1) GR3030050T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341442A (en) * 1998-09-14 2000-03-15 Cit Alcatel A heating system for crude oil pipelines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738443B1 (fr) * 1995-08-28 1997-10-03 Electricite De France Element de connexion pour echangeur electrique annulaire

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727585A (en) * 1927-08-23 1929-09-10 Robert A Carleton Fluid heating and vaporizing apparatus
DE919184C (de) * 1951-12-20 1954-10-14 Hermann Waste Einrichtung zum Erhitzen von Gasen, Daempfen und Fluessigkeiten
FR1239842A (fr) * 1959-11-04 1960-08-26 Cie Ind D Applic Electro Mecan Procédé pour la pasteurisation des produits gras, crémeux ou visqueux et machine pour la mise en oeuvre de ce procédé ou procédé similaire
DE1159413B (de) * 1962-06-27 1963-12-19 Basf Ag Elektrisch beheizter Duennschichtverdampfer zur Entwaesserung von AEtzalkaliloesungen
GB2084284A (en) * 1980-09-22 1982-04-07 Showa Denki Kogyo Co Ltd Heated pipeline
US4425936A (en) * 1982-08-02 1984-01-17 Thermon Manufacturing Company Concentric tube heat tracing apparatus
AU550594B2 (en) * 1983-06-16 1986-03-27 Colin Maxwell Finch High power electric heater
FR2664784A1 (fr) * 1990-07-12 1992-01-17 Doat Robert Rechauffeur de fluide utilisant des tubes chauffes par effet joule qui transmettent leur energie simultanement par leurs faces interne et externe.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727585A (en) * 1927-08-23 1929-09-10 Robert A Carleton Fluid heating and vaporizing apparatus
DE919184C (de) * 1951-12-20 1954-10-14 Hermann Waste Einrichtung zum Erhitzen von Gasen, Daempfen und Fluessigkeiten
FR1239842A (fr) * 1959-11-04 1960-08-26 Cie Ind D Applic Electro Mecan Procédé pour la pasteurisation des produits gras, crémeux ou visqueux et machine pour la mise en oeuvre de ce procédé ou procédé similaire
DE1159413B (de) * 1962-06-27 1963-12-19 Basf Ag Elektrisch beheizter Duennschichtverdampfer zur Entwaesserung von AEtzalkaliloesungen
US3247888A (en) * 1962-06-27 1966-04-26 Basf Ag Electrically heated film evaporator
GB2084284A (en) * 1980-09-22 1982-04-07 Showa Denki Kogyo Co Ltd Heated pipeline
US4425936A (en) * 1982-08-02 1984-01-17 Thermon Manufacturing Company Concentric tube heat tracing apparatus
AU550594B2 (en) * 1983-06-16 1986-03-27 Colin Maxwell Finch High power electric heater
FR2664784A1 (fr) * 1990-07-12 1992-01-17 Doat Robert Rechauffeur de fluide utilisant des tubes chauffes par effet joule qui transmettent leur energie simultanement par leurs faces interne et externe.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
COLOMBO ET AL: "L'ELECTRICITE,UN NOUVEAU FLUIDE THERMIQUE", REVUE GENERALE DE L'ELECTRICITE, no. 10, November 1992 (1992-11-01), PARIS FR, pages 56 - 61, XP000320635 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2341442A (en) * 1998-09-14 2000-03-15 Cit Alcatel A heating system for crude oil pipelines
GB2341442B (en) * 1998-09-14 2001-01-24 Cit Alcatel A heating system for crude oil pipelines

Also Published As

Publication number Publication date
GR3030050T3 (en) 1999-07-30
DE69416357D1 (de) 1999-03-18
DE69416357T2 (de) 1999-08-26
EP0637723B1 (de) 1999-02-03
FR2708726B1 (fr) 1995-09-01
FR2708726A1 (fr) 1995-02-10
ES2129601T3 (es) 1999-06-16
ATE176523T1 (de) 1999-02-15
DK0637723T3 (da) 1999-09-20

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