FR2468080A1 - Solar heat collector panel - has convex form with air spaces above and below absorber conduit - Google Patents

Solar heat collector panel - has convex form with air spaces above and below absorber conduit Download PDF

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Publication number
FR2468080A1
FR2468080A1 FR7926462A FR7926462A FR2468080A1 FR 2468080 A1 FR2468080 A1 FR 2468080A1 FR 7926462 A FR7926462 A FR 7926462A FR 7926462 A FR7926462 A FR 7926462A FR 2468080 A1 FR2468080 A1 FR 2468080A1
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FR
France
Prior art keywords
absorber
support structure
solar collector
convex
face
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
FR7926462A
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French (fr)
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FR2468080B1 (en
Inventor
Claude Ivorra
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.)
Phenol Engineering SA
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Phenol Engineering 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 Phenol Engineering SA filed Critical Phenol Engineering SA
Priority to FR7926462A priority Critical patent/FR2468080A1/en
Publication of FR2468080A1 publication Critical patent/FR2468080A1/en
Application granted granted Critical
Publication of FR2468080B1 publication Critical patent/FR2468080B1/fr
Granted legal-status Critical Current

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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
    • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
    • 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

Abstract

The solar heat collector consists of a base (1) constructed from a rigid, moulded, insulating material, an absorber (2) with an inlet (5), an outlet (6) through which the heat carrying fluid circulates and a transparent cover (3). This is sealed to the base around the perimeter (4). The upper surface (7) of the base (1) is convex and carries protrusions (8) which support the absorber, which is also convex. It creates a layer of air (10) between the two. The upper surface (7) of the absorber has a reflective surface. The transparent outer cover is concave to match the shape of the absorber and provides a constant width air gap (d).

Description

La présente invention a pour objet un capteur solaire, du type comprenant une structure porteuse en matière isolante, un absorbeur fixé sur la face antérieure dê cette structure porteuse et un couvercle transparent en forme de coupole, assemblé à la dite structure porteuse et logeant 1' absorbeur.  The present invention relates to a solar collector, of the type comprising a support structure made of insulating material, an absorber fixed to the front face of this support structure and a transparent cover in the form of a dome, assembled to said support structure and housing 1 ' absorber.

Les capteurs solaires de ce type peuvent être notamment destinés à la production d'eau chaude, l'absorbeur étant dans ce but relié,par des canalisations, à une installation d'utilisation de l'eau chauffée dans le capteur. Solar collectors of this type can in particular be intended for the production of hot water, the absorber being for this purpose connected, by pipes, to an installation for using the heated water in the collector.

Ces capteurs solaires sont réalisés généralement au moyen de deux coques moulées, l'une transparente permettant d'obtenir l'effet de serre désiré, et l'autre opaque étant réalisée en matériau ayant des propriétés isolantes, ces deux coques pouvant provenir d'un même moule, tandis que l'absorbeur possède habituellement une forme plane.Le problème rencontré avec les capteurs actuels de ce type réside dans le fait que, pour obtenir une isolation satisfaisante, il ne faut pas que l'épaisseur d'isolation descende en-dessous de 40 mm environ, ce qui, compte tenu de la symétrie du capteur, donne une épaisseur trop importante entre le couvercle transparent et l'absorbeur, le couvercle en forme de coupole se trouvant n trop haut au-dessus de l'absorbeur.Il en résulte que la lame d'air, comprise entre le couvercle et l'absorbeur, est d'épaisseur non constante et dans l'ensemble trop forte, ce qui est nuisible au rendement. These solar collectors are generally produced by means of two molded shells, one transparent making it possible to obtain the desired greenhouse effect, and the other opaque being made of material having insulating properties, these two shells being able to come from a same mold, while the absorber usually has a planar shape. The problem encountered with current sensors of this type lies in the fact that, in order to obtain satisfactory insulation, the thickness of insulation must not drop below below about 40 mm, which, given the symmetry of the sensor, gives an excessive thickness between the transparent cover and the absorber, the dome-shaped cover being n too high above the absorber. As a result, the air space, between the cover and the absorber, is of non-constant thickness and on the whole too strong, which is detrimental to the yield.

La présente invention vise à remédier à cet inconve- nient, en fournissant un perfectionnement aux capteurs solaires du type considéré, évitant de laisser une épaisseur d'air trop forte entre le couvercle transparent et l'absorbeur, tout en conservant la forme avantageuse de coupole de ce couvercle, et sans nuire à l'isolation. The present invention aims to remedy this drawback, by providing an improvement to the solar collectors of the type under consideration, avoiding leaving too much air thickness between the transparent cover and the absorber, while retaining the advantageous shape of a dome. of this cover, and without affecting the insulation.

A cet effet, selon l'invention, la face antérieure de la structure porteuse est convexe, et l'absorbeur possède une forme correspondante, de manière que la distance entre la face libre de l'absorbeur et la face inter ne du couvercle soit sensiblement constante et relativement réduite. To this end, according to the invention, the front face of the support structure is convex, and the absorber has a corresponding shape, so that the distance between the free face of the absorber and the internal face of the cover is substantially constant and relatively small.

Le problème rappelé ci-dessus est ainsi résolu en supprimant l'assemblage plan de l'absorbeur sur la structure porteuse, et en créant, à la place, une géométrie convexe qui a pour résultat de mieux positionner l'absorbeur par rapport au couvercle en forme de coupole, en le surélevant. ",de manière à limiter l'épaisseur de l'espace libre entre l'absorbeur et le couvercle. La configuration selon l'invention a aussi pour avantage d'augmenter le pouvoir isolant de la structure porteuse. The problem recalled above is thus resolved by eliminating the planar assembly of the absorber on the support structure, and by creating, instead, a convex geometry which results in better positioning of the absorber relative to the cover in dome-shaped, elevating it. ", so as to limit the thickness of the free space between the absorber and the cover. The configuration according to the invention also has the advantage of increasing the insulating power of the support structure.

Suivant une forme de réalisation de l'invention, la face antérieure convexe de la structure porteuse supporte l'absorbeur de forme correspondante par l'intermédiaire de pions, ménageant une lame d'air entre l'absorbeur et la structure porteuse. Ces pions peuvent être constitués par des inserts disposés dans le moule de fabrication de la structure porteuse isolante, réalisée de façon connue en matière cellulaire(mousse) injectée. La lame d'air ainsi créée à l'arrière de l'absorbeur, du côté de la structure porteuse, augmente l'isolation et contribue à l'obtention d'un bon rendement.Avantageusement, ce"non contact entre l'absorbeur et la structure porteuse isolante est combiné avec un revêtement réfléchissant prévu sur la face antérieure convexe de cette structure porteuse, et permettant de renvoyer en direction de l'absorbeur le rayonnement infrarouge émis par l'absorbeur lui lame, et ainsi d'augmenter encore le rendement du capteur, non seulement du point de vue de l'isolation mais aussi du point de vue de l'émission rayonnante. According to one embodiment of the invention, the convex anterior face of the support structure supports the absorber of corresponding shape by means of pins, providing an air space between the absorber and the support structure. These pins can be formed by inserts arranged in the mold for manufacturing the insulating support structure, produced in a known manner from injected cellular material (foam). The air gap thus created at the rear of the absorber, on the side of the support structure, increases the insulation and contributes to obtaining a good yield. Advantageously, this "non-contact between the absorber and the insulating support structure is combined with a reflective coating provided on the convex anterior face of this support structure, and making it possible to return the infrared radiation emitted by the absorber to the absorber towards the absorber, and thus further increase the yield of the sensor, not only from the point of view of insulation but also from the point of view of radiant emission.

En ce qui concerne la convexité de la face antérieure de la structure porteuse, ainsi que de la forme correspondante de l'absorbeur, divers modes de réaXisation iont envisageables dans le cadre de la présente invention :formes simples, telles que surfaces cylindriques ou sphériques, ou surfaces complexes, avec une pluralité de centres et de rayons de courbure, le bord extérieur de la structure porteuse restant cependant de préférence plan pour faciliter l'assemblage avec l'absorbeur et avec le couvercle du capteur. As regards the convexity of the anterior face of the support structure, as well as of the corresponding shape of the absorber, various modes of re-axis can be envisaged in the context of the present invention: simple shapes, such as cylindrical or spherical surfaces, or complex surfaces, with a plurality of centers and radii of curvature, the outer edge of the support structure however preferably remaining flat to facilitate assembly with the absorber and with the cover of the sensor.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence à l'unique figure du dessin annexé représentant en coupe, et de manière très schématique, une forme de réalisation de ce capteur solaire. Anyway, the invention will be well understood with the aid of the description which follows, with reference to the single figure of the appended drawing representing in section, and very schematically, an embodiment of this solar collector.

Comme le montre le dessin, le capteur solaire consi déré comprend, de façon générale et connue en soi, une structure porteuse 1 en matière cellulaire, telle que mousse phénolique, supportant un absorbeur 2, et un couvercle transparent 3 en forme de coupole recouvrant 1'absw- beur 2 et l'emprisonnant, la structure porteuse 1 et le couvercle 3 étant assemblés en 4, le long de leur bord extérieur. Des tubulures d'entrée 5 et de sortie 6, traversant la structure porteuse 1, permettent l'arrivée du fluide à chauffer dans l'absorbeur 2, et le départ du fluide chaufféers sont utilisation. As the drawing shows, the solar collector considered comprises, generally and known per se, a support structure 1 of cellular material, such as phenolic foam, supporting an absorber 2, and a transparent cover 3 in the form of a dome covering 1 'absorber 2 and trapping it, the supporting structure 1 and the cover 3 being assembled at 4, along their outer edge. Inlet pipes 5 and outlet 6, passing through the support structure 1, allow the arrival of the fluid to be heated in the absorber 2, and the departure of the heated fluid are used.

Selon l'invention, la face antérieure 7 de la structure porteuse 1 est de forme convexe, correspondant sensiblement à la forme de coupe du couvercle 3, et elle supporte l'absorbeur 2, possédant lui aussi une forme cintrée analogue, par l'intermédiaire de pions 8 faisant saillie au-dessus de ladite face 7. Ainsi est d'abord ménagée une première lame d'air 9, d'épaisseur d sensiblement constante et relativement réduite, entre la face libre (face supérieure) de l'absorbeur 2 et la face interne du couvercle 3. En outre, la disposition décrite ménage une autre lame d'air 10 entre la face antérieure 7 convexe de la structure porteuse 1 et l'absorbeur 2. According to the invention, the front face 7 of the support structure 1 is of convex shape, corresponding substantially to the cut shape of the cover 3, and it supports the absorber 2, also having a similar curved shape, via pins 8 projecting above said face 7. Thus is first formed a first air gap 9, of thickness d substantially constant and relatively reduced, between the free face (upper face) of the absorber 2 and the internal face of the cover 3. In addition, the arrangement described provides for another air space 10 between the convex front face 7 of the support structure 1 and the absorber 2.

Les pions 8 sont représentés comme étant réalisés d'une seule pièce avec la structure porteuse 1,mais ils peuvent etre réalisés aussi sous la forme de pièces séparées, comme des inserts disposés dans le moule de fabrication par injection de la structure porteuse. The pins 8 are shown as being made in one piece with the support structure 1, but they can also be made in the form of separate pieces, like inserts arranged in the mold for injection molding of the support structure.

Le capteur solaire représenté possède un excellent rendement, grâce à la combinaison de la lame d'air 9 d'épaisseur réduite située entre l'absorbeur 2 et le couvercle 3, de l'autre lame d'air 10 ménagée entre la structure porteuse isolante 1 et- l'absopbeur 2, et d'un revê- tement réfléchissant appliqué sur la face antérieure convexe 7 de la structure porteuse. The solar collector shown has excellent efficiency, thanks to the combination of the air gap 9 of reduced thickness located between the absorber 2 and the cover 3, of the other air gap 10 formed between the insulating support structure 1 and the absorber 2, and a reflective coating applied to the convex anterior face 7 of the support structure.

Comme il va de soi, et comme il résulte déjà de ce qui précède, l'invention ne se limite pas à la seule forme de réalisation de ce capteur solaire qui a été décrite ci-dessus, à titre d'exemple; elle en embrasse, au contraire, toutes les variantes réalisées suivant le même principe, quelles qu'en soient les formes de détail notamment pour les parties convexes. C'est ainsi que la face antérieure 7 de la structure porteuse 1 peut être une surface à simple ou double courbure,telle qu'une surface cylindrique ou sphérique, ou encore une surface plus complexe...  As is obvious, and as already follows from the above, the invention is not limited to the only embodiment of this solar collector which has been described above, by way of example; on the contrary, it embraces all the variants produced according to the same principle, whatever the forms of detail, in particular for the convex parts. Thus the front face 7 of the supporting structure 1 can be a surface with single or double curvature, such as a cylindrical or spherical surface, or even a more complex surface ...

Claims (7)

- R'VENDICATIONS -- CLAIMS - 1.- Capteur solaire, du type comprenant une structure porteuse en matière isolante, un absorbeur fixé sur la face antérieure de cette structure porteuse et un couvercle transparent en forme de coupole, assemblé à la dite structure porteuse et logeant l'absorbeur, caractérisé en ce que la face antérieure de la structure porteuse est convexe, et l'absorbeur possède une forme correspondante, de matière que la distance entre la face libre de l'absorbeur et la face interne du couvercle soit sensiblement constante et relativement réduite. 1.- Solar collector, of the type comprising a support structure made of insulating material, an absorber fixed to the front face of this support structure and a transparent cover in the form of a dome, assembled to said support structure and housing the absorber, characterized in that the front face of the support structure is convex, and the absorber has a corresponding shape, so that the distance between the free face of the absorber and the internal face of the cover is substantially constant and relatively reduced. 2.- Capteur solaire selon la revendication 1,caractéri- sé en ce que la face antérieure convexe de la structure porteuse supporte l'absorbeur de forme correspondan par l'intermédiaire de pions, ménageant une lame d'air entre l'absorbeur et la structure porteuse. 2. A solar collector according to claim 1, characterized in that the convex anterior face of the support structure supports the absorber of corresponding shape by means of pins, leaving an air gap between the absorber and the load-bearing structure. 3.- Capteur solaire selon la revendication 2,caractérisé en ce que les pions précités sont constitués par des inserts disposés dans le moule de fabrication de la structure porteuse isolante, réalisée de façon connue en matière cellulaire injectée. 3.- solar collector according to claim 2, characterized in that the aforementioned pins consist of inserts arranged in the mold for manufacturing the insulating carrier structure, produced in a known manner from injected cellular material. 4. Capteur solaire selon la revendication 2 ou 3, caractérisé en ce que la structure porteuse isolante comporte, sur sa face antérieure convexe, donc du côté de la lame d'air précitée, un revêtenent réfléchissant permettant de renvoyer en direction de l'absorbeur le rayonnement infrarouge émis par l'absorbeur lui-même. 4. Solar collector according to claim 2 or 3, characterized in that the insulating supporting structure comprises, on its convex anterior face, therefore on the side of the aforesaid air space, a reflective coating making it possible to return towards the absorber infrared radiation emitted by the absorber itself. 5. Capteur solaire selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la face antérieure convexe de la structure porteuse, ainsi que la forme correspondante de l'absorbeur, est une surface cylindrique. 5. Solar collector according to any one of claims 1 to 4, characterized in that the convex front face of the support structure, as well as the corresponding shape of the absorber, is a cylindrical surface. 6.- Capteur solaire selon l'une quelconque des revendications 1 à 4, caractérisé en ce que la face antérieure convexe de la structure porteuse, ainsi que la forme correspondante de 1'absorbeur, est une surface sphérique. 6. A solar collector according to any one of claims 1 to 4, characterized in that the convex front face of the support structure, as well as the corresponding shape of the absorber, is a spherical surface. 7.- Capteur solaire selon l'une quelconque des revendications 1 à 4,caractérisé en ce que la face antérieure convexe de la structure porteuse, ainsi que la forme correspondante de l'absorbeur, est une surface complexe, avec une pluralité de centres et de rayons de courbure,le bord extérieur de la structure porteuse restant cependant de préférence plan.  7.- solar collector according to any one of claims 1 to 4, characterized in that the convex anterior face of the support structure, as well as the corresponding shape of the absorber, is a complex surface, with a plurality of centers and radii of curvature, the outer edge of the supporting structure however preferably remaining flat.
FR7926462A 1979-10-19 1979-10-19 Solar heat collector panel - has convex form with air spaces above and below absorber conduit Granted FR2468080A1 (en)

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FR7926462A FR2468080A1 (en) 1979-10-19 1979-10-19 Solar heat collector panel - has convex form with air spaces above and below absorber conduit

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Application Number Priority Date Filing Date Title
FR7926462A FR2468080A1 (en) 1979-10-19 1979-10-19 Solar heat collector panel - has convex form with air spaces above and below absorber conduit

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FR2468080A1 true FR2468080A1 (en) 1981-04-30
FR2468080B1 FR2468080B1 (en) 1983-02-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056255A1 (en) * 2002-01-02 2003-07-10 Selck, Stefanie Solar collector and method for thermally collecting solar energy

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2178311A5 (en) * 1972-03-27 1973-11-09 Salmand Bernard
US3943911A (en) * 1974-05-31 1976-03-16 Yu Ying Nien Solar heat collector
FR2339818A1 (en) * 1976-01-28 1977-08-26 Surrel Yves Solar radiation energy collector for heating water - has absorber with coated liquid reservoir serving primary heat exchanger and circulation controlled by thermostats
FR2376377A1 (en) * 1976-12-30 1978-07-28 Lucchetti Lucien Solar energy heater for house roof mounting - comprising corrugated sheets of steel and an integral water reservoir
FR2379777A1 (en) * 1977-02-04 1978-09-01 Surrel Yves Highly thermally efficient solar energy water heater - comprises steel heat receiver connected to heat exchanger enclosed in polyurethane foam fibre glass shell having lead-free glass windows
DE2811731A1 (en) * 1978-03-17 1979-09-20 Wolfgang Goepfert Solar heat collector - with space between twin hemispherical or semi-cylindrical shells evacuated

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2178311A5 (en) * 1972-03-27 1973-11-09 Salmand Bernard
US3943911A (en) * 1974-05-31 1976-03-16 Yu Ying Nien Solar heat collector
FR2339818A1 (en) * 1976-01-28 1977-08-26 Surrel Yves Solar radiation energy collector for heating water - has absorber with coated liquid reservoir serving primary heat exchanger and circulation controlled by thermostats
FR2376377A1 (en) * 1976-12-30 1978-07-28 Lucchetti Lucien Solar energy heater for house roof mounting - comprising corrugated sheets of steel and an integral water reservoir
FR2379777A1 (en) * 1977-02-04 1978-09-01 Surrel Yves Highly thermally efficient solar energy water heater - comprises steel heat receiver connected to heat exchanger enclosed in polyurethane foam fibre glass shell having lead-free glass windows
DE2811731A1 (en) * 1978-03-17 1979-09-20 Wolfgang Goepfert Solar heat collector - with space between twin hemispherical or semi-cylindrical shells evacuated

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003056255A1 (en) * 2002-01-02 2003-07-10 Selck, Stefanie Solar collector and method for thermally collecting solar energy

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FR2468080B1 (en) 1983-02-04

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