EP1107645A1 - Dispositif prefectionne de chauffage ohmique d'un fluide, installation de traitement d'un fluide incorporant un tel dispositif et procédé de traitement d'un fluide par chauffage ohmique. - Google Patents
Dispositif prefectionne de chauffage ohmique d'un fluide, installation de traitement d'un fluide incorporant un tel dispositif et procédé de traitement d'un fluide par chauffage ohmique. Download PDFInfo
- Publication number
- EP1107645A1 EP1107645A1 EP00403218A EP00403218A EP1107645A1 EP 1107645 A1 EP1107645 A1 EP 1107645A1 EP 00403218 A EP00403218 A EP 00403218A EP 00403218 A EP00403218 A EP 00403218A EP 1107645 A1 EP1107645 A1 EP 1107645A1
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- European Patent Office
- Prior art keywords
- fluid
- plates
- chamber
- heated
- heat exchanger
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- 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.)
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/60—Heating arrangements wherein the heating current flows through granular powdered or fluid material, e.g. for salt-bath furnace, electrolytic heating
Definitions
- the invention relates to the field of heat treatment of a fluid, and in particular heat treatments comprising at least one step ohmic heating.
- the invention relates more particularly to fluids food, and especially those to be pasteurized or sterilized, for example.
- Ohmic heating is a well-known heating technique volume by Joule effect. It consists in establishing an electric current in an electrical circuit interrupted at the level of conductive plates by making circulate an electrically conductive fluid between these plates. The fluid having a certain electrical resistance, it produces heat by Joule effect, and therefore "self-heats".
- the object of the invention is to provide a solution different from those known.
- an ohmic heating device which comprises at least one heating chamber delimited by walls, two of which consist of conductive plates substantially parallel to each other and spaced from one another by distance chosen.
- This room also has at least one entrance allowing the introduction of the fluid to be heated near a first end of the plates and at least one outlet placed near a second end of these plates, opposite the first end, and allowing the fluid to be collected after it has circulated between the plates, substantially parallel to these.
- each room of the device comprises at least one spacer which defines the spacing between plates and includes a recessed central part allowing the circulation of fluid and having two side faces against which the plates and which are provided with openings to allow surface contact between the fluid and the plates.
- the spacer includes, on either side of the central part, respectively a first end part in which the entrance is formed fluid intake communicating with the hollowed-out central part and a second end part in which the outlet of the collection of fluid communicating with this hollowed-out central part.
- the device may include a single or several chambers juxtaposed to each other, in a sealed manner.
- a first embodiment (called “series"), the rooms are juxtaposed so that the exit of a room feeds the entry of the room which follows it, while the entrance to this room is supplied by leaving the room which precedes it.
- the device can be so modular.
- a second embodiment (called "parallel / series”), the chambers are juxtaposed to each other, sealed, so that their respective inputs communicate with each other and that their outputs communicate with each other.
- the device includes a first multiplicity of rooms and at least a second multiple rooms, leaving one of the first and second multiplicities feeding the entry of the other of the first and second multiplicities. All combinations of these two embodiments can be considered.
- Each room may have one or two spacers juxtaposed, or even more, in particular so as to vary the spacing between the electrodes.
- rooms comprising two or more inlets, and one or two or more outlets, so as to allow two or more flows to flow simultaneously.
- the invention also relates to an installation for processing fluid which includes the ohmic heating device presented above. More specifically, this installation includes a device for heating a first fluid, coupled to a first heat exchanger comprising a first circuit where the first heated fluid from the device flows, and a second circuit where a second fluid circulates, the first and second circuits being placed in relation to each other so that the first and second fluids exchange calories to lower the temperature of the first fluid and increase that of the second fluid by respective values chosen.
- the first fluid is heated fluid delivered at the outlet of the device, while the second fluid is a refrigerant.
- the outlet of the device always supplies the input of the first circuit of the first exchanger of heat, but the output of the second circuit of this exchanger feeds the input of this same device.
- the first fluid is therefore the heated fluid by the device, while the second fluid is the fluid to be heated by the device.
- the first heat exchanger therefore simultaneously ensures pre-heating of the fluid and pre-cooling of the same fluid after heater.
- the first heat exchanger heat is preferably housed between a second heat exchanger and the device.
- the second heat exchanger includes a third circuit where circulates the first precooled fluid, delivered by the output of the first circuit, and a fourth circuit where a third refrigerant circulates, the third and fourth circuits being placed in relation to each other so that the first and third fluids exchange calories to lower the temperature of the first precooled fluid by a selected value.
- each heat exchanger is of the stacked plates.
- the successive plates define two by two of the fluid circulation chambers, and successive chambers define portions of two different circuits to allow the exchange of calories between the fluids of these two circuits.
- the first and second heat exchangers may constitute a single general heat exchanger.
- the stacked plates of the general heat exchanger and the chambers of heating of the device have substantially identical dimensions.
- the general exchanger and the device can be assembled in series in forming a one-piece structure using securing means such as as tie rods coupled to nuts.
- the device and the exchanger (s) can be separated physically, their coupling is then obtained by attached conduits.
- the invention also relates to a fluid treatment method. by ohmic heating which includes the steps indicated below.
- one (or more) room (s) is provided heater which comprises (comprise) two walls constituted by conductive plates substantially parallel to each other and spaced apart on the other by a chosen distance.
- the plates are supplied with current electric.
- the fluid to be heated is introduced nearby from one end of the plates, then the fluid is circulated between the plates, substantially parallel to them, so that it heats up inside the chamber, by ohmic effect, and finally we collect the fluid heated near a second end of the plates, opposite the first end.
- a fourth step to lower the selected value by temperature of the first fluid by exchange of calories with a second fluid.
- the first fluid is the heated fluid delivered by the outlet of the (or) heating chamber (s), while the second fluid is a fluid refrigerant.
- the first fluid is the heated fluid delivered by the heating chamber (s), while the second fluid is the fluid that needs to be heated by this (or these) heating chamber (s).
- a pre-heating is carried out simultaneously fluid and pre-cooling that fluid after it has been heated.
- the method may include, after the fourth step, a fifth step to lower the value choose the temperature of the first pre-cooled fluid by heat exchange with a third refrigerant.
- FIG. 1 a device for ohmic heating according to the invention.
- This device 1 is, in the example illustrated, composed of five heating chambers juxtaposed one against the other others and communicating with each other.
- This device is therefore of the type multi-bedroom, but it may have only one bedroom.
- the number of chambers of the device according to the invention may vary as required.
- a chamber 2 is delimited by two plates 3, 4 made in a conductive material, preferably metallic, as well as by a spacer 5 for adjusting the spacing between the two plates conductive 3 and 4.
- These plates are more preferably still of the type DSA (from the acronym "Dimension Stable Anode”).
- DSA Dission Stable Anode
- the spacer 5 is an element three-dimensional comprising a central part 6, hollowed out, framed by two end parts 7 and 8 in which are respectively formed a fluid intake inlet 9 and fluid collection outlet 10, which each communicate with the hollowed-out central part 6.
- the spacer 5 is made of an insulating material, for example a polymer, and more preferably in PEEK (English acronym for PolyEtherEtherKetone). But many other insulating materials can be considered.
- the embodiment of these spacers depends of the material (s) used: machining and / or welding and / or molding.
- intake 9 and collection 10 are substantially L-shaped.
- the conductive plates 3 and 4 preferably have dimensions substantially equal to dimensions of the lateral faces 11 of the spacer 5. Consequently, for allow the introduction of the fluid to be heated in the chamber 6, just as the evacuation from this chamber 6 of the collected and heated fluid, each conductive plate 3, 4 has an opening (or light) 12 in one of its two ends.
- Each conductive plate constitutes an electrode intended to be supplied with electric current by a circuit suitable for this purpose, not shown, or grounded (as in this example, end plates 3-E and 4-S). This feeding can be done, for example at the level of the lateral tab 13 that each plate has 3, 4.
- the purpose of the device is to heat the fluid which circulates the interior of the central part 6 of the chamber 2, by Joule effect, the faces side 11 of the spacer are therefore open, so that the fluid can contact (or come to lick) the conductive plates 3 and 4, forming electrodes.
- the fluid which circulates substantially parallel to the plates, between the intake inlet 9 and the outlet of collection 10 establishes a "connection" between the two conductive plates, if although said fluid gives off heat due to its resistivity.
- the general supply of the different plates conductive takes place in a "triangle" type mode in which the end plates 3-E and 4-S are respectively earthed while the intermediate plates 3 and 4 are placed at potentials chosen, for example 50 or 100 volts.
- This mode of current supply is currently preferred.
- the fluid intake and fluid collection which respectively have plates 3-E and 4-S at the mass, not used to heat the fluid, but to "break" possible current leaks.
- the power of the device can be, for example, of the order of 6 kW three-phase for a flow of 300 l / h, or 120 kW for a flow of 6000 l / h.
- each conductive plate 3, 4 is used simultaneously by two successive chambers 6, so that the opening 12 which it comprises in one of its two ends serves both as an intake opening and opening of collection.
- the spacer always includes a heating chamber 6 supplied by an intake inlet 9 and feeding a collection outlet 10.
- the parts of the intake inlet 9 and the collection exit 10 which lead into the hollowed out part of the chamber 6, are produced in the form of "divergent" elements, which improves the distribution of the fluid inside the chamber and its collection leaving this room.
- each spacer has a divergent element 14, 15. It follows that the flow which enters through the intake inlet 9 is subdivided into two substreams. We could also consider superimposing three or more spacers, so as to create three or more fluxes. Well heard, the flows communicate with each other inside the chamber heater 6, so that electric current can flow between the two conductive plates 3 and 4. In this embodiment, in particular, it is possible to provide more than one fluid intake inlet and / or more fluid collection outlets, including for each room.
- FIG. 5 shows an ohmic heating device assembled using securing means such as tie rods 29 to ends of which are screwed nuts 30.
- the assembly of plates and spacers is therefore carried out by pressure.
- the device includes a fluid intake inlet 34 at the first chamber 2 (which includes plate 3-E), and an outlet 20 for the collection of fluid heated at the level of the last chamber 2 (which includes the plate 4-S).
- the circulation of the fluid inside the device can be either fully alternated (up / down / up / down ...), this which corresponds to a "series" circulation as indicated above, either partially alternating (rising then descending or descending then rising), as illustrated in FIG. 6, which corresponds to a circulation "parallel / series” type.
- the device comprises a first part which feeds a second part.
- the first part has three chambers supplied with fluid from above, in parallel, the fluid having circulated in each chamber being collected at the bottom.
- the second part has three chambers supplied with fluid from the first part, from below, in parallel, the fluid having circulated in each chamber being collected at the top and feeding the output 20 of the device.
- FIGS. 7A to 7D describe a mode for producing a fluid treatment installation according to the invention.
- a such invention is particularly interesting in applications where it is firstly necessary to heat a fluid to a given temperature, for example 140 ° C, in order to sterilize or pasteurize it, then secondly to lower its temperature to a second value, less than the first, for example in order to condition it.
- FIGS. 7A to 7D illustrate an exemplary embodiment of a installation according to the invention in which the device 1 is coupled, in line, to a general heat exchanger 17 with "two stages" (or two parts).
- the first stage 16 (or first part, or even first exchanger) is used, both to preheat the fluid to be brought to the first temperature by device 1, and pre-cool, to a so-called temperature “intermediate” means the fluid which has just been heated by the device 1.
- the second part 18 is used to cool the fluid which comes to be precooled by the first part 16 of the heat exchanger 17, at a second temperature.
- the first part 16 of the heat exchanger general 17 has on the side of the device 1, preferably an inlet 19 supplied with heated fluid by outlet 20 of device 1.
- This inlet 19 supplies a first circuit 21 (see FIG. 8) which supplies cooled fluid, in output of the first part 16, the second part 18 which we will come back to further.
- the first part 16 has another entry 22, placed preferably opposite entry 19, i.e. on the second side part 18 of the exchanger 17.
- This input 22 supplies a second circuit 23 which preferably has an alternating circulation to that of the heated fluid which circulates inside the first circuit.
- the first 21 and second 23 circuits are arranged to allow an exchange of calories between the fluid heated and the cold fluid to preheat.
- the first part 16 of the heat exchanger 17 consists of plates stacked 24 which delimit two by two of the chambers 25 in which circulate the two types of fluid (heated and to be heated).
- the stacked plates are of the corrugated type.
- corrugated plates 24 is well known to the person skilled in the art. art. It is therefore unnecessary to describe them in detail. what we can to say is that the heated fluid when it circulates inside the first circuit 21, from input 19 to output 43 which feeds the second part 18, loses calories in favor of the fluid to be heated which circulates in the second circuit 23, from input 22 to device 1.
- the second part 18 of the heat exchanger 17 is constituted in the same way as the first part 16. It therefore comprises a series of stacked plates 24 which define two to two of the heat exchange chambers. More specifically, the precooled fluid circulates inside a third circuit 32 which ends at the level an outlet 26. To cool this precooled fluid, a fourth is provided circuit 33 also constituted by the corrugated stacked plates 24. This fourth circuit 33 is supplied with refrigerant by an input 27 placed at an end face of the exchanger 17 opposite the device 1, and leads to an outlet 28 which is, in the example illustrated on Figures 5, also placed at this face opposite the device 1.
- the device 1 has transverse dimensions substantially identical to those of the general heat exchanger 17.
- the transverse dimensions of the stacked plates, corrugated, 24, spacers 5 and conductive plates 3 and 4 are substantially identical. Only the cheeks that define the plates end of the exchanger and / or of the device, will possibly have slightly different dimensions, if necessary, by example for fixing or resistance issues.
- the device will preferably comprise, on the one hand, in each of its ends and, on the other hand, at the interface between the parts of the heat exchanger between the heat exchanger and the device, manifolds 31 preferably made in the form of curved specific plates, possibly reinforced offering more fluid circulation volumes important.
- the installation according to the invention can be declined in numerous variants, particularly in terms of the locations of entrances and exits.
- a particularly interesting variant consists in using a heat exchanger which has only one part. Two cases can be considered
- the fluid which circulates in the second circuit 23 is the fluid to be heated. This fluid is therefore preheated by the fluid which has just been heated by the device 1, which circulates in the first circuit 21 and is itself precooled by the fluid which circulates in the second circuit 23.
- the fluid which circulates in the second circuit 23 is a refrigerant, and the fluid to be heated supplies directly input 34 of device 1.
- the fluid to heating is not preheated, and the heated fluid is not pre-cooled, it is indeed cooled by the refrigerant.
- the device 1 is coupled (associated) by two conduits 40, 41 to a heat exchanger general 17 two-stage 16 and 18.
- Exit 42 of the second circuit 23 of the first part 16 of the exchanger 17 supplies preheated fluid, via the conduit 40, inlet 34 of device 1, while outlet 20 of device supplies heated fluid, via conduit 41, to the input 19 of the first circuit 21 of the first part 16 of the exchanger 17.
- the device 1 is therefore an element of the independent installation mechanically from the exchanger 17 with which it cooperates through the fluid.
- the general exchanger is therefore assembled separately from the device 1, for example using tie rods 29 and nuts 31.
- the device 1 is coupled (associated) by two conduits 40, 41 to a first heat exchanger heat 16.
- the outlet 42 of the second circuit 23 of the first heat exchanger heat 16 feeds pre-heated fluid, via the conduit 40, the inlet 34 of the device 1, while the output 20 of the device supplies heated fluid, via the conduit 41, the input 19 of the first circuit 21 of the first heat exchanger heat 18.
- the first heat exchanger 16 is coupled (associated) via a conduit 45 to a second heat exchanger 18 intended to cool the fluid pre-cooled.
- the output 43 of the first circuit 21 of the first heat exchanger heat 16 supplies pre-cooled fluid, via conduit 45, inlet 44 of the third circuit 32 of the second heat exchanger 18.
- the fluid cooled leads to the third circuit 32 via the output 28.
- the device 1 is therefore an element of the independent installation mechanically from both the first 16 and second 18 heat exchangers heat with which it cooperates by means of the fluid to be heated. Both exchangers are therefore assembled separately from each other, for example at using tie rods 29 and nuts 31. Furthermore, as illustrated in the Figure 10, the dimensions of the two heat exchangers are not necessarily identical. It may indeed be advantageous if, for example, the second exchanger is larger than the first.
- the invention also relates to a fluid treatment method. by ohmic heating. This process is characterized by the steps given below.
- Each chamber comprises, by therefore, two walls formed by conductive plates substantially parallel to each other and spaced apart from one another by distance chosen.
- two successive heating chambers share the same plate conductive.
- the conductive plates are supplied with Electric power.
- the fluid to be heated is introduced to near a first end of the conductive plates, then we do circulate this fluid between the plates, substantially parallel to the latter, so that it can heat up inside the rooms, by effect ohmic. Finally, the fluid thus heated is collected near a second end of the plates, opposite the first end. Well of course, when several chambers are used, the fluid is completely warmed up once it reaches the exit of the very last bedroom.
- the process may include a fourth step, coming after the third step, and intended to lower the temperature of the first fluid to a chosen value, by exchanging calories with a second fluid.
- This second fluid can be either a refrigerant, or the fluid to be heated, itself, and in this case this fluid to be heated is preheated by the first fluid.
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- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Liquid Developers In Electrophotography (AREA)
- Control Of Resistance Heating (AREA)
- Dairy Products (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Resistance Heating (AREA)
- Wire Bonding (AREA)
- External Artificial Organs (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
- la figure 1 est une vue éclatée d'un dispositif de chauffage ohmique selon l'invention, à plusieurs chambres,
- la figure 2 est une vue de face d'une entretoise du type de celle utilisée dans le dispositif de la figure 1,
- la figure 3 est une vue en coupe transversale d'une variante de chambre de dispositif,
- la figure 4 est une vue en coupe transversale d'une autre variante de chambre de dispositif, à deux flux,
- la figure 5 est une vue du dessus d'un dispositif de chauffage ohmique du type de celui illustré sur la figure 1, une fois assemblé,
- la figure 6 est un schéma illustrant la circulation du fluide dans une variante de dispositif à plusieurs chambres,
- les figures 7A à 7D sont respectivement des vues de côté (A), du dessus (B), de face côté avant (C) et de face côté arrière (D) d'une installation selon l'invention,
- la figure 8 est une vue schématique éclatée illustrant les circulations respectives de deux fluides dans des portions de circuits indépendants d'un échangeur de chaleur de l'installation,
- la figure 9 est une première variante de l'installation de la figure 7 dans laquelle le dispositif est associé à l'échangeur de chaleur par un couplage tubulaire, et
- la figure 10 est une seconde variante de l'installation de la figure 7 dans laquelle le dispositif est associé à un premier échangeur de chaleur destiné au pré-refroidissement et au pré-chauffage du fluide à traiter, lui même associé à un second échangeur de chaleur destiné au refroidissement du fluide pré-refroidi, les deux associations s'effectuant par un couplage tubulaire.
Claims (29)
- Dispositif de chauffage ohmique d'un fluide (1), caractérisé en ce qu'il comprend au moins une chambre de chauffage (2) délimitée par des parois, deux de ces parois étant constituées par des plaques conductrices (3,4) sensiblement parallèles entre-elles et espacées l'une de l'autre d'une distance choisie, ladite chambre comprenant en outre au moins une entrée (9,12) propre à introduire un fluide à proximité d'une première extrémité desdites plaques (3,4) et au moins une sortie (10,12) placée à proximité d'une seconde extrémité desdites plaques, opposée à la première extrémité, et propre à collecter ledit fluide après qu'il ait circulé entre les plaques, sensiblement parallèlement à celles-ci, ainsi que des moyens propres à alimenter en courant électrique lesdites plaques, de sorte que le fluide se réchauffe dans la chambre, par effet ohmique, lors de sa circulation parallèlement aux plaques.
- Dispositif selon la revendication 1, caractérisé en ce que lesdites plaques (3,4) sont espacées l'une de l'autre par au moins une entretoise (5) comprenant une partie centrale évidée (6) pour la circulation du fluide et comportant deux faces latérales (11) propres à être solidarisées à étanchéité aux plaques (3,4) et munies d'ouvertures propres à autoriser un contact surfacique entre le fluide et les plaques.
- Dispositif selon la revendication 2, caractérisé en ce que ladite entretoise (5) comprend de part et d'autre de ladite partie centrale (6) respectivement une première partie d'extrémité (7) dans laquelle se trouve formée l'entrée d'admission (9) de fluide, communiquant avec ladite partie centrale évidée, et une seconde partie d'extrémité (8) dans laquelle se trouve formée la sortie de collection de fluide (10) communiquant avec cette partie centrale évidée.
- Dispositif selon la revendication 3, caractérisé en ce que la première partie d'extrémité (7) comprend une première lumière formant l'entrée d'admission (9) et en ce que la seconde partie d'extrémité (8) comprend une seconde lumière formant la sortie de collection (10), lesdites lumières présentant une forme en L, dans une vue en coupe longitudinale.
- Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que lesdites plaques (3,4) sont espacées l'une de l'autre par au moins deux entretoises (5).
- Dispositif selon la revendication 5, caractérisé en ce que lesdites entretoises sont placées l'une contre l'autre tête-bêche.
- Dispositif selon l'une des revendications 1 à 6, caractérisé en ce qu'il comporte une multiplicité de chambres (2) juxtaposées les unes aux autres, à étanchéité, de telle sorte que la sortie (10) d'une chambre alimente l'entrée (9) de la chambre qui la suit, tandis que l'entrée (9) de cette chambre est alimentée par la sortie (10) de la chambre qui la précède.
- Dispositif selon l'une des revendications 1 à 7, caractérisé en ce qu'il comporte une multiplicité de chambres (2) juxtaposées les unes aux autres, à étanchéité, de telle sorte que leurs entrées respectives communiquent entre elles et que leurs sorties respectives communiquent entre elles.
- Dispositif selon la revendication 8, caractérisé en ce qu'il comporte au moins une première multiplicité de chambres (2) et au moins une seconde multiplicité de chambres (2), la sortie de l'une desdites première et seconde multiplicités alimentant l'entrée de l'autre desdites première et seconde multiplicités.
- Dispositif selon l'une des revendications 7 à 9, caractérisé en ce que les chambres (2) voisines partagent une plaque commune (3 ;4).
- Dispositif selon l'une des revendications 2 à 10, caractérisé en ce que lesdites plaques (3,4) présentent des dimensions sensiblement identiques à celle desdites entretoises (5), et comportent en l'une de leurs extrémités au moins une ouverture (12) propre à être placée en regard d'au moins une entrée d'admission (9) et/ou d'au moins une sortie de collection (10).
- Dispositif selon l'une des revendications 2 à 11, caractérisé en ce que les plaques (3,4) sont solidarisées à étanchéité aux entretoises (5) par des moyens de fixation, en particulier des tirants (29) à l'une au moins des extrémités desquels se trouve vissé un écrou (30).
- Installation de traitement d'un fluide, caractérisée en ce qu'elle comprend un dispositif de chauffage ohmique d'un premier fluide (1) selon l'une des revendications 1 à 12, couplé à un premier échangeur de chaleur (16) comprenant un premier circuit (21) dans lequel circule ledit premier fluide chauffé, provenant du dispositif (1), et un second circuit (23) dans lequel circule un second fluide, lesdits premier et second circuits étant placés l'un par rapport à l'autre de manière à ce que les premier et second fluides échangent des calories pour abaisser la température du premier fluide et augmenter celle du second fluide de valeurs choisies.
- Installation selon la revendication 13, caractérisée en ce que ledit premier fluide est le fluide chauffé délivré par la sortie (20) du dispositif (1), et ledit second fluide est un fluide frigorigène.
- Installation selon la revendication 13, caractérisée en ce que la sortie (20) du dispositif (1) alimente l'entrée (19) du premier circuit (21) du premier échangeur de chaleur (16) et la sortie du second circuit (23) du premier échangeur de chaleur (16) alimente l'entrée (34) du dispositif (1), de sorte que ledit premier fluide soit le fluide chauffé par le dispositif (1), et ledit second fluide soit le fluide à chauffer par ce dispositif, ledit premier échangeur de chaleur (16) assurant ainsi, simultanément, un pré-chauffage d'une première partie du fluide et un pré-refroidissement d'une seconde partie de ce même fluide préalablement chauffé.
- Installation selon l'une des revendications 13 à 15, caractérisée en ce qu'il comprend un second échangeur de chaleur (18) comportant un troisième circuit (32) dans lequel circule ledit premier fluide pré-refroidi délivré par ladite sortie du premier circuit (21), et un quatrième circuit (33) dans lequel circule un troisième fluide frigorigène, lesdits troisième (32) et quatrième (33) circuits étant placés l'un par rapport à l'autre de manière à ce que les premier et troisième fluides échangent des calories pour abaisser la température abaisser la température du premier fluide pré-refroidi d'une valeur choisie.
- Installation selon l'une des revendications 13 à 16, caractérisée en ce que ledit premier échangeur de chaleur (16) est du type à plaques empilées (24), deux plaques (24) successives définissant une chambre de circulation de fluide (25), et deux chambres successives définissant des portions de deux circuits différents parmi lesdits circuits (21,23), de manière à permettre l'échange de calories entre les fluides de ces deux circuits.
- Installation selon l'une des revendications 16 et 17, caractérisée en ce que ledit second échangeur de chaleur (18) est du type à plaques empilées (24), deux plaques (24) successives définissant une chambre de circulation de fluide (25), et deux chambres successives définissant des portions de deux circuits différents parmi lesdits circuits (32,33), de manière à permettre l'échange de calories entre les fluides de ces deux circuits.
- Installation selon l'une des revendications 16 à 18 en combinaison avec l'une des revendications 13 à 15, caractérisée en ce que lesdits premier (16) et second (18) échangeurs de chaleur constituent les deux parties d'un même échangeur de chaleur général (17).
- Installation selon la revendication 19, caractérisée en ce que les plaques empilées (24) de l'échangeur de chaleur général (17) et les chambres de chauffage (2) du dispositif (1) présentent des dimensions sensiblement identiques, de sorte que cet échangeur et ce dispositif puissent être assemblés en série en formant une structure monobloc à l'aide de moyens de solidarisation, en particulier des tirants (29) à l'une au moins des extrémités desquels se trouve vissé un écrou (30).
- Procédé de traitement d'un fluide par chauffage ohmique, caractérisé en ce qu'il comprend les étapes suivantes :a) prévoir au moins une chambre de chauffage comprenant deux parois constituées par des plaques conductrices sensiblement parallèles entre-elles et espacées l'une de l'autre d'une distance choisie,b) alimenter lesdites plaques en courant électrique,c) introduire un fluide à proximité d'une première extrémité desdites plaques, puis faire circuler le fluide entre les plaques, sensiblement parallèlement à celles-ci, de sorte qu'il se réchauffe dans la chambre, par effet ohmique, et collecter ce fluide réchauffé à proximité d'une seconde extrémité desdites plaques, opposée à la première extrémité.
- Procédé selon la revendication 21, caractérisé en ce qu'à l'étape a) on prévoit une multiplicité de chambres juxtaposées les unes aux autres, à étanchéité, de telle sorte que la sortie d'une chambre alimente l'entrée de la chambre qui la suit, tandis que l'entrée de cette chambre est alimentée par la sortie de la chambre qui la précède.
- Procédé selon la revendication 21, caractérisé en ce qu'à l'étape a) on prévoit une multiplicité de chambres juxtaposées les unes aux autres, à étanchéité, de telle sorte que leurs entrées respectives communiquent entre elles et que leurs sorties respectives communiquent entre elles.
- Procédé selon la revendication 23, caractérisé en ce qu'à l'étape a) on prévoit au moins une première multiplicité de chambres et au moins une seconde multiplicité de chambres, la sortie de l'une desdites première et seconde multiplicités alimentant l'entrée de l'autre desdites première et seconde multiplicités.
- Procédé selon l'une des revendications 22 à 24, caractérisé en ce qu'à l'étape a) les chambres voisines partagent une plaque commune.
- Procédé selon l'une des revendications 21 à 25, caractérisé en ce qu'il comprend, après l'étape c), une étape d) dans laquelle on abaisse, d'une valeur choisie, la température du premier fluide par échange de calories avec un second fluide.
- Procédé selon la revendication 26, caractérisé en ce qu'à l'étape d) le premier fluide est le fluide chauffé délivré par la sortie de la (ou des) chambre(s) de chauffage, et le second fluide est un fluide frigorigène.
- Procédé selon la revendication 26, caractérisé en ce qu'à l'étape d) le premier fluide est le fluide chauffé délivré par la (ou les) chambre(s) de chauffage, et le second fluide est le fluide devant être chauffé par cette (ou ces) chambre(s) de chauffage, de manière à assurer simultanément un pré-chauffage d'une première partie du fluide et un pré-refroidissement d'une seconde partie de ce même fluide préalablement chauffé.
- Procédé selon la revendication 28, caractérisé en ce qu'il comprend, après l'étape d), une étape e) dans laquelle on abaisse, d'une valeur choisie, la température du premier fluide pré-refroidi par échange de calories avec un troisième fluide frigorigène.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9915215 | 1999-12-02 | ||
FR9915215A FR2802052B1 (fr) | 1999-12-02 | 1999-12-02 | Dispositif perfectionne de chauffage ohmique d'un fluide, installation de traitement d'un fluide incorporant un tel dispositif et procede de traitement d'un fluide par chauffage ohmique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1107645A1 true EP1107645A1 (fr) | 2001-06-13 |
EP1107645B1 EP1107645B1 (fr) | 2007-05-09 |
Family
ID=9552814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00403218A Expired - Lifetime EP1107645B1 (fr) | 1999-12-02 | 2000-11-17 | Dispositif prefectionné de chauffage ohmique d'un fluide, installation de traitement d'un fluide incorporant un tel dispositif et procédé de traitement d'un fluide par chauffage ohmique. |
Country Status (9)
Country | Link |
---|---|
US (1) | US6421501B2 (fr) |
EP (1) | EP1107645B1 (fr) |
JP (1) | JP3642731B2 (fr) |
AT (1) | ATE362298T1 (fr) |
AU (1) | AU1868601A (fr) |
DE (1) | DE60034757T2 (fr) |
DK (1) | DK1107645T3 (fr) |
FR (1) | FR2802052B1 (fr) |
WO (1) | WO2001041509A1 (fr) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE516844C3 (sv) * | 2000-07-07 | 2002-04-17 | Alfa Laval Ab | Plattvärme/plattvärmeväxlare med elektriskt uppvärmbara skikt i dubbelväggiga plattelement |
FR2823995B1 (fr) * | 2001-04-25 | 2008-06-06 | Alfa Laval Vicarb | Dispositif perfectionne d'echange et/ou de reaction entre fluides |
US7171111B2 (en) * | 2002-07-03 | 2007-01-30 | Sheldon Carlton W | Method of heating water with rod shaped electrodes in a two-dimensional matrix |
US20060291822A1 (en) * | 2002-12-24 | 2006-12-28 | Sheldon Carlton W | Sheldon electro-matrix core |
FR2874306B1 (fr) * | 2004-08-19 | 2008-01-11 | Bel Fromageries | Procede d'assainissement d'un produit fromager visqueux |
US20130075060A1 (en) * | 2010-01-11 | 2013-03-28 | Ge Healthcare Bio-Sciences Ab | Aseptic connection of heat exchanger units |
US20140072288A1 (en) | 2011-05-12 | 2014-03-13 | Nxstage Medical, Inc. | Fluid heating apparatuses, systems, and methods |
US10433572B2 (en) | 2012-03-20 | 2019-10-08 | Stichting Wageningen Research | Process for fast and homogeneously heating a liquid product and apparatus for such process |
PL2667684T3 (pl) * | 2012-05-23 | 2018-02-28 | Fruit Tech Natural, S.A. | Urządzenie i sposób nagrzewania oporowego cieczy z cząstkami |
US9841186B2 (en) * | 2013-12-12 | 2017-12-12 | Massachusetts Institute Of Technology | Tunable nucleate boiling using electric fields and ionic surfactants |
EP2957848A1 (fr) | 2014-06-17 | 2015-12-23 | Alfa Laval Corporate AB | Dispositif de chauffage et installation d'échangeur de chaleur |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1143495A (fr) * | 1952-07-15 | 1957-10-01 | Four électrique à bain de sel | |
US3469012A (en) * | 1967-11-20 | 1969-09-23 | Eastman Kodak Co | Process for supplying precisely controlled supplemental heating to polymer melts |
EP0690660A1 (fr) * | 1994-06-30 | 1996-01-03 | Electricite De France | Dispositif et procédé de chauffage d'un liquide ionique en écoulement |
WO1999008482A1 (fr) * | 1997-08-12 | 1999-02-18 | David Itzhak | Systemes de chauffage a electrodes a courant alternatif |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US535267A (en) * | 1895-03-05 | Electrolytic conduit for beer or other liquids | ||
US2188625A (en) * | 1936-12-24 | 1940-01-30 | Dufour Rene Alphonse | Device for the heating of flowing liquids such as rubber latex |
US2314966A (en) * | 1937-03-29 | 1943-03-30 | Astle William | Plate heat exchanger |
US2392021A (en) * | 1940-10-05 | 1946-01-01 | Cherry Burrell Corp | Heat exchange apparatus |
US2659580A (en) * | 1950-04-19 | 1953-11-17 | Separator Ab | Plate heat exchanger |
US2937856A (en) * | 1956-01-26 | 1960-05-24 | Kusel Dairy Equipment Co | Plate heat exchanger |
NL215577A (fr) * | 1956-03-21 | |||
US3299252A (en) * | 1964-08-10 | 1967-01-17 | John E Meek | Electric fluid heating device |
US3414436A (en) * | 1966-09-16 | 1968-12-03 | American Factors Ass Ltd | Resistance massecuite heater |
US4542034A (en) * | 1982-08-10 | 1985-09-17 | Alfa-Laval Ab | Method for heat treatment of milk and the like |
US5290583A (en) * | 1992-04-02 | 1994-03-01 | David Reznik | Method of electroheating liquid egg and product thereof |
-
1999
- 1999-12-02 FR FR9915215A patent/FR2802052B1/fr not_active Expired - Fee Related
-
2000
- 2000-11-17 DE DE60034757T patent/DE60034757T2/de not_active Expired - Lifetime
- 2000-11-17 DK DK00403218T patent/DK1107645T3/da active
- 2000-11-17 WO PCT/FR2000/003208 patent/WO2001041509A1/fr active Application Filing
- 2000-11-17 EP EP00403218A patent/EP1107645B1/fr not_active Expired - Lifetime
- 2000-11-17 AU AU18686/01A patent/AU1868601A/en not_active Abandoned
- 2000-11-17 AT AT00403218T patent/ATE362298T1/de not_active IP Right Cessation
- 2000-12-01 JP JP2000366577A patent/JP3642731B2/ja not_active Expired - Fee Related
- 2000-12-01 US US09/726,495 patent/US6421501B2/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1143495A (fr) * | 1952-07-15 | 1957-10-01 | Four électrique à bain de sel | |
US3469012A (en) * | 1967-11-20 | 1969-09-23 | Eastman Kodak Co | Process for supplying precisely controlled supplemental heating to polymer melts |
EP0690660A1 (fr) * | 1994-06-30 | 1996-01-03 | Electricite De France | Dispositif et procédé de chauffage d'un liquide ionique en écoulement |
WO1999008482A1 (fr) * | 1997-08-12 | 1999-02-18 | David Itzhak | Systemes de chauffage a electrodes a courant alternatif |
Also Published As
Publication number | Publication date |
---|---|
FR2802052B1 (fr) | 2002-02-08 |
EP1107645B1 (fr) | 2007-05-09 |
US20010021308A1 (en) | 2001-09-13 |
FR2802052A1 (fr) | 2001-06-08 |
US6421501B2 (en) | 2002-07-16 |
JP3642731B2 (ja) | 2005-04-27 |
DE60034757T2 (de) | 2008-01-17 |
ATE362298T1 (de) | 2007-06-15 |
DK1107645T3 (da) | 2007-09-24 |
AU1868601A (en) | 2001-06-12 |
WO2001041509A1 (fr) | 2001-06-07 |
DE60034757D1 (de) | 2007-06-21 |
JP2001211825A (ja) | 2001-08-07 |
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