EP1869373A1 - Method of creating an optimum heat exchange in an assembly comprising a thermally-conductive absorbent plate and a heat-transfer fluid - Google Patents
Method of creating an optimum heat exchange in an assembly comprising a thermally-conductive absorbent plate and a heat-transfer fluidInfo
- Publication number
- EP1869373A1 EP1869373A1 EP06743596A EP06743596A EP1869373A1 EP 1869373 A1 EP1869373 A1 EP 1869373A1 EP 06743596 A EP06743596 A EP 06743596A EP 06743596 A EP06743596 A EP 06743596A EP 1869373 A1 EP1869373 A1 EP 1869373A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plate
- conduits
- heat
- transfer fluid
- heat transfer
- 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- Withdrawn
Links
- 239000013529 heat transfer fluid Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000002745 absorbent Effects 0.000 title claims abstract description 11
- 239000002250 absorbent Substances 0.000 title claims abstract description 11
- 230000005855 radiation Effects 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000005219 brazing Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000000265 homogenisation Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
- F24S10/75—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/30—Arrangements for connecting the fluid circuits of solar collectors with each other or with other components, e.g. pipe connections; Fluid distributing means, e.g. headers
-
- 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
- Y02E10/44—Heat exchange systems
Definitions
- the present invention relates to a method for ensuring optimal heat exchange within an assembly consisting of a thermally conductive absorbent plate and a heat transfer fluid flowing in at least one thermally conductive tabular duct. It applies in particular but not exclusively to the collectors of thermal solar panels.
- a plate generally made of copper or aluminum, the upper face of which is coated with a selective layer favoring the absorption of sunlight; • pipes having a cross-section which are welded to the underside of said plate, these pipes generally being made of copper or aluminum;
- the heat transmission from the wall of a pipe to the heat transfer liquid is optimal when the temperature difference between said wall and the heat transfer liquid is large or, in the vicinity from the wall, the temperature of the heat transfer liquid is close to that of this wall;
- the flow of the heat transfer liquid in the pipes is laminar and the temperature distribution is not uniform indeed, the temperature of the heat transfer liquid decreases from the upper layers located near the wall of a pipe towards the center liquid therefore, the heat exchanges within the heat transfer liquid and between the pipes and the heat transfer liquid are not optimal.
- the object of the invention is therefore more particularly to eliminate these drawbacks by proposing a method making it possible to optimize the heat exchanges:
- a method for optimizing the heat exchanges between a thermally conductive absorbent plate exposed to heat radiation and a heat transfer fluid circulating in at least one thermally conductive tabular duct in thermal contact with said plate as well as within heat transfer fluid characterized in that, in order to promote heat exchange, it consists in using zones of said plate to constitute a part of the wall of said duct so that the heat transfer fluid is in direct contact with said plate way to reduce the thermal resistance between the absorbent plate and the heat transfer liquid circulating inside said conduit.
- the conduits can be arranged on the two faces of the plate, they can then communicate with each other by means of orifices making it possible to create sinuous paths thus forcing the heat-transfer liquid to sudden changes in direction during its passage through these orifices. which accentuates the turbulence and ensures stirring of the heat transfer liquid thereby promoting uniformity of temperatures and reduction of the laminar effect.
- a material absorbing the heat radiation can be applied to one of the two faces of said plate as well as possibly to the external walls of said conduits located on this face.
- the conduits may be arranged in particular on said plate "in harp” or in "serpentine".
- the conduits may consist of profiled elements having a longitudinal central concavity bordered by two opposite lateral wings which extend substantially in the same plane, these two lateral wings being fixed with sealing on one face of the plate.
- the concavities of these profiled elements may be closed at their ends by convex transverse walls provided with a flange which extends in the above-mentioned plane, in line with the above-mentioned lateral wings.
- the fixing of the conduits on the plate at the level of said lateral wings advantageously makes it possible to extend the zone of direct contact between a conduit and the plate, thus optimizing the thermal conduction.
- Figure 1 is a sectional view of an assembly arranged according to the implementation of the method according to the invention and comprising a plate on which are fixed tabular conduits.
- Figure 2 is a sectional view showing the circulation of fluids within an assembly of the above type which is constituted by a plate and tabular conduits.
- Figure 3 is a sectional view showing the circulation of fluids within an assembly of the above type consisting of a plate on which the tabular conduits are arranged in a serpentine.
- Figure 4 is a schematic view of an assembly of the above type comprising a plate on which the conduits are arranged in a coil.
- Figure 5 is a schematic view of an assembly of the above type comprising a plate on which the conduits are arranged in a harp.
- the method according to the invention consists in arranging on a thermally conductive absorbent plate 1 thermally conductive tabular conduits 2 in which circulate a heat transfer fluid 3 (shown schematically in Figures 2 and 3 by arrows), the arrangement of tabular conduits 2 on the plate 1 is made in such a way that zones of the plate 1 constitute a part of the wall of the said conduits 2 so as to allow the heat transfer fluid 3 to be in direct contact with the said plate 1 thus reducing the thermal resistance between the plate 1 and the heat transfer liquid 3 circulating inside said conduits 2.
- each tubular conduit 2 may consist of a profiled element 10 having a longitudinal central concavity 11 bordered by two opposite lateral wings 12 which extend substantially in the same plane, these two lateral wings 12 being fixed with sealing on one side of the plate 1.
- the fixing of the conduits 2 on the plate 1 at the level of the lateral wings 12 advantageously makes it possible to extend the zone of direct contact between each conduit 2 and the plate 1, thus optimizing the thermal conduction.
- the fixing of the conduits 2 on the plate 1 which takes place at the level of the lateral wings 12 can be carried out in particular by welding or by brazing or by gluing.
- the conduits 2 may be arranged on both sides of the plate 1 in this case, the plate 1 will include orifices 4 facing which will be arranged the ends of the conduits 2 in this way, the heat transfer liquid 3 circulating in the conduits 2 will be forced to sudden changes of direction during its passage through the orifices 4 which will accentuate the turbulence and ensure mixing of said liquid 3 favoring this so the temperature uniformity and the reduction of the laminar effect.
- the concavities 11 of the profiled elements 10 can be closed at their ends by convex transverse walls 13 provided with a flange 14 which extends in the plane of the lateral wings 12, in their extension.
- the conduits 2 may be arranged in particular on said plate 1: • In the manner of harps: as illustrated in FIG. 5, the conduits 2 are placed parallel, at equal distances, on one face of the said plate 1.
- One of the ends of each of the conduits 2 communicates via the 'through an orifice 4 of the above type with a single intake duct 6 formed by a profile which extends at right angles to the other face of the plate 1, the other end of each of the ducts 2 communicates by by means of an orifice 4 of the aforementioned type with an outlet duct 6 ′ constituted by a profile which extends at right angles to the other face of the plate 1.
- the intake duct 6 distributes the heat transfer liquid 3 in the heat exchange ducts 2, during their passage through these ducts 2, the heat transfer liquid 3 absorbs the calories stored by the plate 1 under the effect of solar radiation, a once heated, this heat transfer fluid 3 is recovered for a u use by the outlet manifold 6 '.
- conduits 2 are placed two by two almost parallel on one face of the plate 1, these conduits 2 being connected by junction conduits 2 'arranged transversely on the other face of the plate 1 and with which they communicate via orifices 4 of the aforementioned type thus, the heat-transfer liquid which circulates in the conduits 2 will be forced to sudden changes of direction during its passage in the junction conduits 2 'which will make it possible to accentuate turbulence within this liquid 3.
- a material absorbing heat radiation can be applied to one of the two faces of said plate 1 as well as possibly on the external walls of said conduits 2 located on this face.
- the absorbent plate 1 will preferably be made of copper or aluminum.
- the conduits 2 will have a thickness of between 0.2 and 0.3 millimeters and will be made of copper.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Sorption Type Refrigeration Machines (AREA)
- Road Signs Or Road Markings (AREA)
Abstract
The invention relates to a method of optimising heat exchanges between (i) a thermally-conductive absorbent plate (1) which is exposed to thermal radiation and a heat-transfer fluid (3) circulating in at least one thermally-conductive conduit tube (2) that is in thermal contact with the plate (1) and (ii) within the heat-transfer fluid (3). The invention is characterised in that, in order to promote heat exchanges, the method uses zones of the aforementioned plate (1) in order to form part of the wall of the conduit tube (2), such that the heat-transfer fluid (3) is in direct contact with the plate (1) so as to reduce the thermal resistance between the plate (1) and the heat-transfer fluid (3) circulating inside the conduit tube (2), said conduit tubes (2) being disposed on the two faces of the plate (1) and being interconnected by means of holes (4) that provided on the plate.
Description
PROCEDE PERMETTANT D'ASSURER UN ECHANGE THERMIQUE OPTIMAL AU SEIN D'UN ENSEMBLE CONSTITUE D'UNE PLAQUE ABSORBANTE THERMIQUEMENT CONDUCTRICE ET D'UN FLUIDE CALOPORTEUR.METHOD FOR PROVIDING OPTIMAL THERMAL EXCHANGE WITHIN AN ASSEMBLY OF A THERMALLY CONDUCTIVE ABSORBENT PLATE AND A HEAT-CONDUCTIVE FLUID.
La présente invention a pour objet un procédé permettant d'assurer un échange thermique optimal au sein d'un ensemble constitué d'une plaque absorbante thermiquement conductrice et d'un fluide caloporteur circulant dans au moins un conduit tabulaire thermiquement conducteur. Elle s'applique notamment mais non exclusivement aux collecteurs des panneaux solaires thermiques.The present invention relates to a method for ensuring optimal heat exchange within an assembly consisting of a thermally conductive absorbent plate and a heat transfer fluid flowing in at least one thermally conductive tabular duct. It applies in particular but not exclusively to the collectors of thermal solar panels.
On sait que les collecteurs des panneaux solaires thermiques comprennent :We know that the collectors of thermal solar panels include:
• une plaque, généralement en cuivre ou en aluminium, dont la face supérieure est revêtue d'une couche sélective favorisant l'absorption de la lumière solaire ; • des tubulures présentant une section en forme de cercle qui sont soudées sur la face inférieure de ladite plaque, ces tubulures étant généralement en cuivre ou en aluminium ;• a plate, generally made of copper or aluminum, the upper face of which is coated with a selective layer favoring the absorption of sunlight; • pipes having a cross-section which are welded to the underside of said plate, these pipes generally being made of copper or aluminum;
• un liquide caloporteur circulant dans les tubulures.• a heat transfer liquid circulating in the pipes.
De cette façon, la lumière solaire frappant la face supérieure de ladite plaque est convertie en chaleur, celle-ci étant conduite vers la zone de soudure puis aux parois des tubulures afin d'être transmise au liquide caloporteur qui s'échauffe lors de son passage dans lesdites tubulures.In this way, the sunlight hitting the upper face of said plate is converted into heat, this being conducted towards the weld zone then at the walls of the pipes in order to be transmitted to the heat-transfer liquid which heats up during its passage in said pipes.
Ce dispositif présente néanmoins les inconvénients suivants :This device nevertheless has the following drawbacks:
• la transmission de chaleur de la paroi d'une tubulure vers le liquide caloporteur est optimale lorsque la différence de température entre ladite paroi et le liquide caloporteur est importante or, au voisinage
de la paroi, la température du liquide caloporteur est proche de celle de cette paroi ;• the heat transmission from the wall of a pipe to the heat transfer liquid is optimal when the temperature difference between said wall and the heat transfer liquid is large or, in the vicinity from the wall, the temperature of the heat transfer liquid is close to that of this wall;
• le liquide caloporteur étant moins bon conducteur de chaleur que le cuivre, la transmission de la chaleur du liquide se situant au voisinage de la paroi d'une tubulure vers le centre du liquide n'est pas optimale.• since the heat transfer liquid is a less good conductor of heat than copper, the heat transfer from the liquid located near the wall of a pipe to the center of the liquid is not optimal.
Ainsi, l'écoulement du liquide caloporteur dans les tubulures est laminaire et la distribution de la température n'est pas uniforme en effet, la température du liquide caloporteur décroît depuis les couches supérieures situées à proximité de la paroi d'une tubulure vers le centre du liquide par conséquent, les échanges thermiques au sein du liquide caloporteur et entre les tubulures et le liquide caloporteur ne sont pas optimales.Thus, the flow of the heat transfer liquid in the pipes is laminar and the temperature distribution is not uniform indeed, the temperature of the heat transfer liquid decreases from the upper layers located near the wall of a pipe towards the center liquid therefore, the heat exchanges within the heat transfer liquid and between the pipes and the heat transfer liquid are not optimal.
L'invention a donc plus particulièrement pour but de supprimer ces inconvénients en proposant un procédé permettant d'optimiser les échanges thermiques :The object of the invention is therefore more particularly to eliminate these drawbacks by proposing a method making it possible to optimize the heat exchanges:
• entre une plaque absorbante thermiquement conductrice exposée à un rayonnement calorifique et un fluide caloporteur circulant dans au moins un conduit tabulaire thermiquement conducteur en contact thermique avec ladite plaque et ;• between a thermally conductive absorbent plate exposed to heat radiation and a heat transfer fluid circulating in at least one thermally conductive tabular duct in thermal contact with said plate and;
• au sein dudit fluide caloporteur.• within said heat transfer fluid.
À cet effet, elle propose un procédé permettant d'optimiser les échanges thermiques entre une plaque absorbante thermiquement conductrice exposée à un rayonnement calorifique et un fluide caloporteur circulant dans au moins un conduit tabulaire thermiquement conducteur en contact thermique avec ladite plaque ainsi qu'au sein du fluide caloporteur caractérisé en ce qu'en vue de favoriser les échanges thermiques, il consiste à utiliser des zones de ladite plaque pour constituer une partie de la paroi dudit conduit de manière à ce que le fluide caloporteur soit en contact direct avec ladite plaque de manière à
réduire la résistance thermique entre la plaque absorbante et le liquide caloporteur circulant à l'intérieur dudit conduit.To this end, it provides a method for optimizing the heat exchanges between a thermally conductive absorbent plate exposed to heat radiation and a heat transfer fluid circulating in at least one thermally conductive tabular duct in thermal contact with said plate as well as within heat transfer fluid, characterized in that, in order to promote heat exchange, it consists in using zones of said plate to constitute a part of the wall of said duct so that the heat transfer fluid is in direct contact with said plate way to reduce the thermal resistance between the absorbent plate and the heat transfer liquid circulating inside said conduit.
Avantageusement, les conduits pourront être disposés sur les deux faces de la plaque, ils pourront alors communiquer entre eux grâce à des orifices permettant de créer des trajets sinueux contraignant ainsi le liquide caloporteur à des changements brusques de direction lors de son passage dans ces orifices ce qui accentue les turbulences et assure un brassage du liquide caloporteur favorisant de cette façon l'uniformisation des températures et la réduction de l'effet laminaire .Advantageously, the conduits can be arranged on the two faces of the plate, they can then communicate with each other by means of orifices making it possible to create sinuous paths thus forcing the heat-transfer liquid to sudden changes in direction during its passage through these orifices. which accentuates the turbulence and ensures stirring of the heat transfer liquid thereby promoting uniformity of temperatures and reduction of the laminar effect.
De manière avantageuse, une matière absorbant le rayonnement calorifique pourra être appliquée sur l'une des deux faces de ladite plaque ainsi qu'éventuellement sur les parois externes desdits conduits situés sur cette face.Advantageously, a material absorbing the heat radiation can be applied to one of the two faces of said plate as well as possibly to the external walls of said conduits located on this face.
Les conduits pourront être disposés notamment sur ladite plaque " en harpe " ou en " en serpentin ".The conduits may be arranged in particular on said plate "in harp" or in "serpentine".
Avantageusement, les conduits pourront être constitués d'éléments profilés présentant une concavité centrale longitudinale bordée par deux ailes latérales opposées qui s'étendent sensiblement dans un même plan, ces deux ailes latérales étant fixées avec étanchéité sur une face de la plaque. De plus, les concavités de ces éléments profilés pourront être refermées à leurs extrémités par des parois transversales bombées munies d'un rebord qui s'étend dans le susdit plan, dans le prolongement des susdites ailes latérales.Advantageously, the conduits may consist of profiled elements having a longitudinal central concavity bordered by two opposite lateral wings which extend substantially in the same plane, these two lateral wings being fixed with sealing on one face of the plate. In addition, the concavities of these profiled elements may be closed at their ends by convex transverse walls provided with a flange which extends in the above-mentioned plane, in line with the above-mentioned lateral wings.
La fixation des conduits sur la plaque au niveau desdites ailes latérales permet de manière avantageuse d'étendre la zone de contact direct entre un conduit et la plaque, optimisant ainsi la conduction thermique.The fixing of the conduits on the plate at the level of said lateral wings advantageously makes it possible to extend the zone of direct contact between a conduit and the plate, thus optimizing the thermal conduction.
Lesdites extrémités des éléments profilés constituant les conduits seront avantageusement disposées en regard desdits orifices.
- A -Said ends of the profiled elements constituting the conduits will advantageously be arranged opposite said orifices. - AT -
Un mode d'exécution de l'invention sera décrit ci-après, à titre d'exemples non limitatifs, avec référence aux dessins annexés, dans lesquels :An embodiment of the invention will be described below, by way of nonlimiting examples, with reference to the appended drawings, in which:
La figure 1 est une vue en coupe d'un ensemble agencé suivant la mise en oeuvre du procédé selon l'invention et comprenant une plaque sur laquelle sont fixés des conduits tabulaires.Figure 1 is a sectional view of an assembly arranged according to the implementation of the method according to the invention and comprising a plate on which are fixed tabular conduits.
La figure 2 est une vue en coupe mettant en évidence la circulation des fluides au sein d'un ensemble du type susdit qui est constitué par une plaque et des conduits tabulaires.Figure 2 is a sectional view showing the circulation of fluids within an assembly of the above type which is constituted by a plate and tabular conduits.
La figure 3 est une vue en coupe mettant en évidence la circulation des fluides au sein d'un ensemble du type susdit constitué par une plaque sur laquelle les conduits tabulaires sont disposés en serpentin.Figure 3 is a sectional view showing the circulation of fluids within an assembly of the above type consisting of a plate on which the tabular conduits are arranged in a serpentine.
La figure 4 est une vue schématique d'un ensemble du type susdit comprenant une plaque sur laquelle les conduits sont disposés en serpentin.Figure 4 is a schematic view of an assembly of the above type comprising a plate on which the conduits are arranged in a coil.
La figure 5 est une vue schématique d'un ensemble du type susdit comprenant une plaque sur laquelle les conduits sont disposés en harpe.Figure 5 is a schematic view of an assembly of the above type comprising a plate on which the conduits are arranged in a harp.
Dans cet exemple, le procédé selon l'invention consiste à disposer sur une plaque absorbante thermiquement conductrice 1 des conduits tabulaires thermiquement conducteurs 2 dans lesquels circulent un fluide caloporteur 3 (représenté schématiquement sur les figures 2 et 3 par des flèches), la disposition des conduits tabulaires 2 sur la plaque 1 est faite d'une telle façon que des zones de la plaque 1 constituent une partie de la paroi desdits conduits 2 afin de permettre au fluide caloporteur 3 d'être en contact direct avec ladite
plaque 1 réduisant ainsi la résistance thermique entre la plaque 1 et le liquide caloporteur 3 circulant à l'intérieur desdits conduits 2.In this example, the method according to the invention consists in arranging on a thermally conductive absorbent plate 1 thermally conductive tabular conduits 2 in which circulate a heat transfer fluid 3 (shown schematically in Figures 2 and 3 by arrows), the arrangement of tabular conduits 2 on the plate 1 is made in such a way that zones of the plate 1 constitute a part of the wall of the said conduits 2 so as to allow the heat transfer fluid 3 to be in direct contact with the said plate 1 thus reducing the thermal resistance between the plate 1 and the heat transfer liquid 3 circulating inside said conduits 2.
A cette fin, chaque conduit tubulaire 2 pourra être constitué d'un élément profilé 10 présentant une concavité centrale longitudinale 11 bordée par deux ailes latérales opposées 12 qui s'étendent sensiblement dans un même plan, ces deux ailes latérales 12 étant fixées avec étanchéité sur une face de la plaque 1.To this end, each tubular conduit 2 may consist of a profiled element 10 having a longitudinal central concavity 11 bordered by two opposite lateral wings 12 which extend substantially in the same plane, these two lateral wings 12 being fixed with sealing on one side of the plate 1.
La fixation des conduits 2 sur la plaque 1 au niveau des ailes latérales 12 permet de manière avantageuse d'étendre la zone de contact direct entre chaque conduit 2 et la plaque 1, optimisant ainsi la conduction thermique.The fixing of the conduits 2 on the plate 1 at the level of the lateral wings 12 advantageously makes it possible to extend the zone of direct contact between each conduit 2 and the plate 1, thus optimizing the thermal conduction.
La fixation des conduits 2 sur la plaque 1 qui s'effectue au niveau des ailes latérales 12 pourra être réalisée notamment par soudure ou par brasage ou par collage.The fixing of the conduits 2 on the plate 1 which takes place at the level of the lateral wings 12 can be carried out in particular by welding or by brazing or by gluing.
De manière avantageuse, tel que cela est représenté sur les figures 2 à 5, les conduits 2 pourront être disposés sur les deux faces de la plaque 1 dans ce cas, la plaque 1 comprendra des orifices 4 en regard desquels seront disposées les extrémités des conduits 2 de cette façon, le liquide caloporteur 3 circulant dans les conduits 2 sera contraint à des changements brusques de direction lors de son passage dans les orifices 4 ce qui permettra d'accentuer les turbulences et d'assurer un brassage dudit liquide 3 favorisant de cette façon l'uniformisation des températures et la réduction de l'effet laminaire.Advantageously, as shown in Figures 2 to 5, the conduits 2 may be arranged on both sides of the plate 1 in this case, the plate 1 will include orifices 4 facing which will be arranged the ends of the conduits 2 in this way, the heat transfer liquid 3 circulating in the conduits 2 will be forced to sudden changes of direction during its passage through the orifices 4 which will accentuate the turbulence and ensure mixing of said liquid 3 favoring this so the temperature uniformity and the reduction of the laminar effect.
Afin d'optimiser le brassage du liquide caloporteur 3 lors de son passage dans les orifices 4, les concavités 11 des éléments profilés 10 pourront être refermées à leurs extrémités par des parois transversales bombées 13 munies d'un rebord 14 qui s'étend dans le plan des ailes latérales 12, dans leur prolongement.In order to optimize the stirring of the heat transfer liquid 3 during its passage through the orifices 4, the concavities 11 of the profiled elements 10 can be closed at their ends by convex transverse walls 13 provided with a flange 14 which extends in the plane of the lateral wings 12, in their extension.
Les conduits 2 pourront être disposés notamment sur ladite plaque 1 :
• A la façon de harpes : tel que cela est illustré sur la figure 5, les conduits 2 sont placés parallèlement, à des distances égales, sur une face de ladite plaque 1. L'une des extrémités de chacun des conduits 2 communique par l'intermédiaire d'un orifice 4 du type susdit avec un conduit d'admission unique 6 constitué par un profilé qui s'étend à angle droit sur l'autre face de la plaque 1, l'autre extrémité de chacun des conduits 2 communique par l'intermédiaire d'un orifice 4 du type susdit avec un conduit de sortie 6'constitué par un profilé qui s'étend à angle droit sur l'autre face de la plaque 1. Le fonctionnement de ce dispositif est alors le suivant : le conduit d'admission 6 distribue le liquide caloporteur 3 dans les conduits d'échange thermique 2, au cours de leur passage dans ces conduits 2, le liquide caloporteur 3 absorbe les calories emmagasinées par la plaque 1 sous l'effet du rayonnement solaire, une fois réchauffée, ce fluide caloporteur 3 est récupéré en vue d'une utilisation par le conduit collecteur de sortie 6'.The conduits 2 may be arranged in particular on said plate 1: • In the manner of harps: as illustrated in FIG. 5, the conduits 2 are placed parallel, at equal distances, on one face of the said plate 1. One of the ends of each of the conduits 2 communicates via the 'through an orifice 4 of the above type with a single intake duct 6 formed by a profile which extends at right angles to the other face of the plate 1, the other end of each of the ducts 2 communicates by by means of an orifice 4 of the aforementioned type with an outlet duct 6 ′ constituted by a profile which extends at right angles to the other face of the plate 1. The operation of this device is then as follows: the intake duct 6 distributes the heat transfer liquid 3 in the heat exchange ducts 2, during their passage through these ducts 2, the heat transfer liquid 3 absorbs the calories stored by the plate 1 under the effect of solar radiation, a once heated, this heat transfer fluid 3 is recovered for a u use by the outlet manifold 6 '.
• A la façon de serpentin : des conduits 2 sont placés deux à deux quasi parallèlement sur une face de la plaque 1, ces conduits 2 étant reliés par des conduits de jonction 2' disposés transversalement sur l'autre face de la plaque 1 et avec lesquels ils communiquent par l'intermédiaire d'orifices 4 du type susdit ainsi, le liquide caloporteur qui circule dans les conduits 2 sera contraint à des changements brusques de direction lors de son passage dans les conduits de jonction 2' ce qui permettra d'accentuer les turbulences au sein de ce liquide 3.• In the serpentine fashion: conduits 2 are placed two by two almost parallel on one face of the plate 1, these conduits 2 being connected by junction conduits 2 'arranged transversely on the other face of the plate 1 and with which they communicate via orifices 4 of the aforementioned type thus, the heat-transfer liquid which circulates in the conduits 2 will be forced to sudden changes of direction during its passage in the junction conduits 2 'which will make it possible to accentuate turbulence within this liquid 3.
Avantageusement, afin d'accroître les capacités d'absorption du rayonnement calorifique de l'ensemble constitué par une plaque 1 et par des conduits tabulaires 2, une matière absorbant le rayonnement calorifique pourra être appliquée sur l'une des deux faces de ladite plaque 1 ainsi qu'éventuellement sur les parois externes desdits conduits 2 situés sur cette face.
La plaque absorbante 1 sera préférentiellement en cuivre ou en aluminium.Advantageously, in order to increase the capacities for absorbing heat radiation from the assembly constituted by a plate 1 and by tabular conduits 2, a material absorbing heat radiation can be applied to one of the two faces of said plate 1 as well as possibly on the external walls of said conduits 2 located on this face. The absorbent plate 1 will preferably be made of copper or aluminum.
De manière préférentielle, les conduits 2 auront une épaisseur comprise entre 0,2 et 0,3 millimètres et seront en cuivre.
Preferably, the conduits 2 will have a thickness of between 0.2 and 0.3 millimeters and will be made of copper.
Claims
1. Procédé permettant d'optimiser les échanges thermiques entre d'une part, une plaque absorbante (1) thermiquement conductrice exposée à un rayonnement calorifique et un fluide caloporteur (3) circulant dans au moins un conduit tabulaire (2) thermiquement conducteur en contact thermique avec ladite plaque (1) et d'autre part, au sein du fluide caloporteur (3), caractérisé en ce qu'en vue de favoriser les échanges thermiques, il consiste à utiliser des zones de ladite plaque (1) pour constituer une partie de la paroi dudit conduit (2) de manière à ce que le fluide caloporteur (3) soit en contact direct avec ladite plaque (1) de façon à réduire la résistance thermique entre la plaque (1) et le liquide caloporteur (3) circulant à l'intérieur dudit conduit (2) ; les conduits (2) étant disposés sur les deux faces de la plaque (1) et communiquent entre eux grâce à des orifices (4) réalisés sur la plaque (1) de manière à imposer au liquide caloporteur (3) un trajet sinueux assurant ainsi une homogénéisation de la température du fluide caloporteur (3) et la réduction de l'effet laminaire.1. Method for optimizing heat exchanges between on the one hand, a thermally conductive absorbent plate (1) exposed to heat radiation and a heat transfer fluid (3) circulating in at least one thermally conductive tabular duct (2) in contact thermal with said plate (1) and on the other hand, within the heat transfer fluid (3), characterized in that in order to promote heat exchanges, it consists in using zones of said plate (1) to constitute a part of the wall of said duct (2) so that the heat transfer fluid (3) is in direct contact with said plate (1) so as to reduce the thermal resistance between the plate (1) and the heat transfer liquid (3) circulating inside said conduit (2); the conduits (2) being arranged on the two faces of the plate (1) and communicate with each other by means of orifices (4) produced on the plate (1) so as to impose on the heat-transfer liquid (3) a sinuous path thus ensuring homogenization of the temperature of the heat transfer fluid (3) and reduction of the laminar effect.
2. Procédé selon la revendication 1, caractérisé en ce qu'il comprend l'application d'une matière absorbant le rayonnement calorifique sur l'une des deux faces de ladite plaque (1) ainsi qu'éventuellement sur les parois externes desdits conduits (2) situés sur cette face.2. Method according to claim 1, characterized in that it comprises the application of a material absorbing heat radiation on one of the two faces of said plate (1) as well as possibly on the external walls of said conduits ( 2) located on this face.
3. Procédé selon l'une des revendications précédentes, caractérisé en ce que les conduits (2) sont disposés à la façon de serpentin ou à la façon de harpes.3. Method according to one of the preceding claims, characterized in that the conduits (2) are arranged in the form of a serpentine or in the manner of harps.
4. Procédé selon la revendication 3, caractérisé en ce que :4. Method according to claim 3, characterized in that:
• . les conduits (2) disposés à la façon de harpes sont placés parallèlement, à des distances égales, sur une face de ladite plaque (1), l'une des
extrémités de chacun des conduits (2) communique par l'intermédiaire d'un orifice (4) du type susdit avec un conduit d'admission unique (6) constitué par un profilé qui s'étend à angle droit sur l'autre face de la plaque (1), l'autre extrémité de chacun des conduits (2) communique par l'intermédiaire d'un orifice (4) du type susdit avec un conduit de sortie (6') constitué par un profilé qui s'étend à angle droit sur l'autre face de la plaque (1) ;•. the conduits (2) arranged in the manner of harps are placed parallel, at equal distances, on one face of said plate (1), one of the ends of each of the conduits (2) communicates via an orifice (4) of the aforementioned type with a single intake conduit (6) constituted by a profile which extends at right angles to the other face of the plate (1), the other end of each of the conduits (2) communicates via an orifice (4) of the above type with an outlet conduit (6 ') constituted by a profile which extends to right angle on the other side of the plate (1);
• les conduits (2) disposés à la façon de serpentin sont placés deux à deux quasi parallèlement sur une face de la plaque (1), ces conduits (2) étant reliés par des conduits de jonction (2') disposés transversalement sur l'autre face de la plaque (1) et avec lesquels ils communiquent par l'intermédiaire d'orifices (4).• the conduits (2) arranged in a serpentine fashion are placed two by two almost parallel on one face of the plate (1), these conduits (2) being connected by junction conduits (2 ') arranged transversely on the other face of the plate (1) and with which they communicate via orifices (4).
5. Dispositif pour la mise en œuvre du procédé selon l'une des revendications 1 à 4, caractérisé en ce que chaque conduit tabulaire (2) est constitué d'un élément profilé (10) présentant une concavité centrale longitudinale (11) bordée par deux ailes latérales opposées (12) qui s'étendent sensiblement dans un même plan, ces deux ailes latérales (12) étant fixées avec étanchéité sur une face de la plaque (1).5. Device for implementing the method according to one of claims 1 to 4, characterized in that each tabular duct (2) consists of a profiled element (10) having a longitudinal central concavity (11) bordered by two opposite lateral wings (12) which extend substantially in the same plane, these two lateral wings (12) being fixed with sealing on one face of the plate (1).
6. Dispositif selon la revendication 5, caractérisé en ce que la fixation des conduits (2) sur la plaque (1) s'effectuant au niveau des ailes latérales (12) est réalisée par soudure ou par brasage ou par collage.6. Device according to claim 5, characterized in that the fixing of the conduits (2) on the plate (1) taking place at the level of the lateral wings (12) is carried out by welding or by brazing or by gluing.
7. Dispositif selon la revendication 6, caractérisé en ce que les concavités (11) des éléments profilés (10) sont refermées à leurs extrémités par des parois transversales bombées (13) munies d'un rebord (14) qui s'étend dans le plan des ailes latérales (12), dans leur prolongement.
7. Device according to claim 6, characterized in that the concavities (11) of the profiled elements (10) are closed at their ends by convex transverse walls (13) provided with a flange (14) which extends in the plane of the lateral wings (12), in their extension.
8. Dispositif selon l'une des revendications 5 à 7, caractérisé en ce que la plaque absorbante (1) est en cuivre ou en aluminium.8. Device according to one of claims 5 to 7, characterized in that the absorbent plate (1) is made of copper or aluminum.
9. Dispositif selon l'une des revendications 5 à 8, caractérisé en ce que les conduits tabulaires (2) ont une épaisseur comprise entre 0,2 et 0,3 millimètres et sont en cuivre.
9. Device according to one of claims 5 to 8, characterized in that the tabular conduits (2) have a thickness between 0.2 and 0.3 millimeters and are made of copper.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0502752A FR2883364B1 (en) | 2005-03-21 | 2005-03-21 | METHOD FOR PROVIDING OPTIMAL HEAT EXCHANGE WITHIN AN ASSEMBLY COMPRISING A THERMALLY CONDUCTIVE ABSORBER PLATE AND A HEAT PUMP FLUID |
| PCT/FR2006/000650 WO2006100393A1 (en) | 2005-03-21 | 2006-03-20 | Method of creating an optimum heat exchange in an assembly comprising a thermally-conductive absorbent plate and a heat-transfer fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1869373A1 true EP1869373A1 (en) | 2007-12-26 |
Family
ID=35148787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP06743596A Withdrawn EP1869373A1 (en) | 2005-03-21 | 2006-03-20 | Method of creating an optimum heat exchange in an assembly comprising a thermally-conductive absorbent plate and a heat-transfer fluid |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8136583B2 (en) |
| EP (1) | EP1869373A1 (en) |
| CN (1) | CN101166940A (en) |
| FR (1) | FR2883364B1 (en) |
| WO (1) | WO2006100393A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE533035C2 (en) * | 2008-09-30 | 2010-06-15 | Suncore Ab | Heat exchanger element |
| JPWO2010122993A1 (en) | 2009-04-22 | 2012-10-25 | 株式会社村田製作所 | Boundary acoustic wave device and manufacturing method thereof |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3076450A (en) * | 1961-06-16 | 1963-02-05 | Edward W Gough | Plastic solar heater |
| US3734178A (en) * | 1971-05-26 | 1973-05-22 | Defawes Ets Thomas | Heat exchanger |
| US4002200A (en) * | 1972-12-07 | 1977-01-11 | Dean Products, Inc. | Extended fin heat exchanger panel |
| US4031881A (en) * | 1975-10-20 | 1977-06-28 | Thiel Heinz E P | Solar heater |
| US4156419A (en) * | 1976-06-11 | 1979-05-29 | Hawthorne Industries, Inc. | Solar collector |
| US4207867A (en) * | 1977-06-29 | 1980-06-17 | Lincoln Hanks | Solar energy collector and method |
| US4324028A (en) * | 1977-09-26 | 1982-04-13 | Honeywell Inc. | Method of fabricating a solar absorber panel |
| US4244355A (en) * | 1978-06-05 | 1981-01-13 | Jack Stout | Modular structurally integrated solar panel |
| US4243020A (en) * | 1978-10-23 | 1981-01-06 | Mier Thomas P | Solar panel and panel assembly |
| EP0024237A3 (en) * | 1979-08-09 | 1981-07-15 | So.De.Em Societe D'exploitation Des Etablissements Minato | Moulding press for concrete products comprising a concrete feed system |
| US4432414A (en) * | 1982-08-23 | 1984-02-21 | The United States Of America Are Represented By The United States Department Of Energy | Dual circuit embossed sheet heat transfer panel |
| JPS60144560A (en) * | 1984-01-05 | 1985-07-30 | Mitsubishi Electric Corp | Solar heat collector |
| ATE121182T1 (en) * | 1991-01-22 | 1995-04-15 | Colux Licht & Leichtbau | ABSORBER BODY WITH FLOW PATHS FOR WATER OR A FLOWABLE HEAT CARRIER AND METHOD FOR THE PRODUCTION THEREOF. |
| NL1009837C2 (en) * | 1998-08-11 | 2000-02-15 | Albertus Kooij | Solar collector and method for manufacturing it. |
| CA2329408C (en) * | 2000-12-21 | 2007-12-04 | Long Manufacturing Ltd. | Finned plate heat exchanger |
| CA2425233C (en) * | 2003-04-11 | 2011-11-15 | Dana Canada Corporation | Surface cooled finned plate heat exchanger |
-
2005
- 2005-03-21 FR FR0502752A patent/FR2883364B1/en not_active Expired - Fee Related
-
2006
- 2006-03-20 EP EP06743596A patent/EP1869373A1/en not_active Withdrawn
- 2006-03-20 CN CNA2006800139639A patent/CN101166940A/en active Pending
- 2006-03-20 US US11/909,352 patent/US8136583B2/en not_active Expired - Fee Related
- 2006-03-20 WO PCT/FR2006/000650 patent/WO2006100393A1/en active Application Filing
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006100393A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2883364A1 (en) | 2006-09-22 |
| FR2883364B1 (en) | 2007-09-28 |
| US20080277096A1 (en) | 2008-11-13 |
| WO2006100393A1 (en) | 2006-09-28 |
| US8136583B2 (en) | 2012-03-20 |
| CN101166940A (en) | 2008-04-23 |
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