FR2507754A1 - Tubular solar heat collector - has prestressed tubing mounted in pairs, onto frame, using removable spindles - Google Patents

Tubular solar heat collector - has prestressed tubing mounted in pairs, onto frame, using removable spindles Download PDF

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Publication number
FR2507754A1
FR2507754A1 FR8111503A FR8111503A FR2507754A1 FR 2507754 A1 FR2507754 A1 FR 2507754A1 FR 8111503 A FR8111503 A FR 8111503A FR 8111503 A FR8111503 A FR 8111503A FR 2507754 A1 FR2507754 A1 FR 2507754A1
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FR
France
Prior art keywords
tubes
receiver
tube
solar
tubular
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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.)
Granted
Application number
FR8111503A
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French (fr)
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FR2507754B1 (en
Inventor
Didier Lepoultel
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MEDITERRANEE CONST NAVALES IND
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MEDITERRANEE CONST NAVALES IND
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Priority to FR8111503A priority Critical patent/FR2507754A1/en
Publication of FR2507754A1 publication Critical patent/FR2507754A1/en
Application granted granted Critical
Publication of FR2507754B1 publication Critical patent/FR2507754B1/fr
Granted legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/22—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals
    • F16L3/223—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes
    • F16L3/227—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets specially adapted for supporting a number of parallel pipes at intervals each support having one transverse base for supporting the pipes each pipe being supported by a separate element fastened to the base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/80—Accommodating differential expansion of solar collector elements
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The solar heat collector consists of a bank of tubes subjected to concentrated solar radiation. The tubes are assembled in pairs (12,12'), each tube being joined by a plate (14,14') to a support tube (20. A removable spindle (22) is passed through each support tube and is fixed to the frame (24) of the collector. During hte assembly of the collector, the tubes are subjected to a 'cold-pull, using a pneumatic or hydraulic cylinder, prior to fixing. This ensures that the stresses due to expansion are minimised. The collector can be dismantled piece by piece piece as required.

Description

La présente invention es~ relative à un récepteur solaire en particulier du type a fl-uitle caloporteur rnonophasique, chauffé par les rayons solaires réfléchis par un champ d'héliostats. On sait qu'un tel récepteur est constitué d'une cavité présentant une surface cylindrique ou prismatique comportant une face avant ouverte placée dans le champ d'héliostats et des parois latérales et postérieure tapissées de tubes, dans lesquels circule le fluide caloporteur. Ces tubes sont généralement groupés suivant un certain nombre de bandeaux adjacents, de façon à réaliser des surfaces de captage du rayonnement solaire constituées de parois de tubes jointifs. The present invention is ~ relating to a solar receiver in particular of the fl-uitle type non-phasic coolant, heated by solar rays reflected by a field of heliostats. It is known that such a receiver consists of a cavity having a cylindrical or prismatic surface comprising an open front face placed in the field of heliostats and side and rear walls lined with tubes, in which the heat transfer fluid circulates. These tubes are generally grouped according to a number of adjacent strips, so as to produce surfaces for collecting solar radiation consisting of walls of contiguous tubes.

A l'heure actuelle, ces surfaces de captage sont réalisées en soudant les tubes des bandeaux respectifs les uns aux autres, ou leurs attaches, ce qui est équivalent, selon leurs génératrices. Il en résulte une quasi impossibilité de démontage, sauf à endommager plusieurs tubes pour avoir accès au tube devant etre remplacé. En outre, cette solution connue présente des problèmes difficiles à résoudre1 en ce qui concerne les possibilités de dilatation différentielle des bandeaux de tubes selon leurs axes et perpendiculairement à leurs axes, afin de suivre les variations thermiques du récepteur solaire. At present, these collection surfaces are produced by welding the tubes of the respective strips to one another, or their fasteners, which is equivalent, depending on their generatrices. This results in almost impossible disassembly, except to damage several tubes to gain access to the tube to be replaced. In addition, this known solution presents problems which are difficult to solve1 with regard to the possibilities of differential expansion of the strips of tubes along their axes and perpendicular to their axes, in order to follow the thermal variations of the solar receiver.

La présente invention se propose d'apporter un moyen permettant de réaliser la surface de captage du rayonnement d'un récepteur solaire au moyen de tubes jointifs répondant aux exigences suivantes - réaliser une surface de captage à l'aide de tubes jointifs selon une tolé
rance inférieure à 1 mm, afin d'éviter que le flux solaire ne passe entre
les tubes et vienne bruler le garnissage isolant interne - doter cette surface de captage de possibilités de dilatation selon la direc
tion de l'axe des tubes et suivant une direction perpendiculaire à cet axe - permettre une démontabilité pièce par pièce des tubes constituant la sur
face de captage - précontraindre à froid les tubes, afin de minimiser leur contrainte ther
mique lorsque le récepteur est mis en température.The present invention proposes to provide a means for achieving the surface for capturing the radiation of a solar receiver by means of contiguous tubes meeting the following requirements - achieving a collector surface using contiguous tubes according to a tolerated
rance less than 1 mm, to prevent the solar flux from passing between
the tubes and burn the internal insulating lining - provide this collecting surface with expansion possibilities according to the direc
tion of the axis of the tubes and in a direction perpendicular to this axis - allow dismantling piece by piece of the tubes constituting the
collector face - cold prestress the tubes, in order to minimize their stress ther
mique when the receiver is warmed up.

Ces objectifs sont obtenus à l'aide d'un système de montage des tubes du récepteur solaire caractérisé en ce qu'il consiste à grouper les tubes deux par deux, à souder chaque tube de la paire sur des pattes constituées d'un fer plat, de façon à réaliser la surface de captage sous la forme de panneaux de tubes jointifs, et à souder les pattes de chaque paire de tubes sur un sup port tubulaire, lesdits supports tubulaires étant maintenus par des broches, elles-mêmes rendues solidaires des supports de la ceinture chaude du récepteur. These objectives are obtained using a system for mounting the tubes of the solar receiver, characterized in that it consists in grouping the tubes two by two, in soldering each tube of the pair on legs made up of a flat iron. , so as to produce the collecting surface in the form of panels of contiguous tubes, and to weld the tabs of each pair of tubes on a tubular support, said tubular supports being held by pins, themselves made integral with the supports of the receiver hot belt.

Selon une caractéristique de cette invention, on réalise une précontrainte à froid des panneaux de tubes, cette précontrainte étant obtenue à l'aide de vérins exerçant une traction contrôlée sur la ceinture froide, à laquelle est liée la ceinture chaude supportant les tubes. According to a characteristic of this invention, a cold prestressing of the tube panels is carried out, this prestressing being obtained by means of jacks exerting a controlled traction on the cold belt, to which the hot belt supporting the tubes is linked.

D'autres caractéristiques et avantages de cette invention ressortiront de la description faite ci-après, en référence aux dessins annexés, qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Other characteristics and advantages of this invention will emerge from the description given below, with reference to the appended drawings, which illustrate an embodiment thereof devoid of any limiting character.

Sur les dessins
la Figure 1 est une vue en élévation latérale et coupe verticale d'un système selon l'invention de montage des tubes tapissant la cavité du récepteur solaire
- la Figure 2 est une vue en plan de la Figure 1 ; et,
- la Figure 3 est une vue en élévation latérale du dispositif réalisant la précontrainte des panneaux de tubes.On the drawings
Figure 1 is a side elevational view in vertical section of a system according to the invention for mounting the tubes lining the cavity of the solar receiver
- Figure 2 is a plan view of Figure 1; and,
- Figure 3 is a side elevational view of the device carrying out the prestressing of the tube panels.

La Figure 1 représente, de façon schématique et partielle, une paroi d'un récepteur solaire du type constitué, comme connu, d'une cavité 10 de forme parallélépipédique rectangle, dont la face avant ouverte est placée dans un champ d'héliostats (non représentés). Les parois latérales et postérieure de ce récepteur sont tapissées, comme connu, de tubes dans lesquels circule le fluide caloporteur, ces tubes débouchant sur des collecteurs d'entrée et de sortie. Figure 1 shows, schematically and partially, a wall of a solar receiver of the type consisting, as known, of a cavity 10 of rectangular parallelepiped shape, the open front face of which is placed in a field of heliostats (not represented). The side and rear walls of this receiver are lined, as known, with tubes in which the heat transfer fluid circulates, these tubes opening onto inlet and outlet manifolds.

Selon l'invention, les tubes tapissant les parois latérales et postérieure sont groupés par paires, chaque tube 12, 12' d'une paire étant monté sur une patte 14, 14', respectivement, de façon à constituer une surface de captage du rayonnement. solaire constituée de tubes jointifs avec une tolérance inférieure au millimètre, évitant ainsi que le flux solaire ne passe entre les tubes et vienne brûler le garnissage isolant 16 de la ceinture chaude. According to the invention, the tubes lining the side and rear walls are grouped in pairs, each tube 12, 12 'of a pair being mounted on a lug 14, 14', respectively, so as to constitute a radiation capture surface. . solar panel consisting of contiguous tubes with a tolerance of less than a millimeter, thus preventing the solar flux from passing between the tubes and burning the insulating lining 16 of the hot belt.

Les pattes 14, 14' de chaque paire de tubes 12, 12' sont soudées sur un support tubulaire tel que 18, et tous les supports tubulaires 18 de chaque paire de tubes sont maintenus en place par une broche telle que 22, rendue solidaire du support 24 de la ceinture chaude.  The legs 14, 14 'of each pair of tubes 12, 12' are welded to a tubular support such as 18, and all the tubular supports 18 of each pair of tubes are held in place by a pin such as 22, made integral with the support 24 of the hot belt.

Un tel montage assure une possibilité de dilatation dans la direction de l'axe des tubes et perpendiculairement à cet axe, afin de suivre les variations thermiques. En effet, les tubes étant libres en rotation, leur dilatation selon leur diamètre n'entraîne aucun problème, et en outre, il n'existe aucun problème de dilatation dans un plan perpendiculaire à l'axe des tubes, étant donné que la dilatation de la ceinture chaude est identique à celle des tubes. Such an arrangement provides a possibility of expansion in the direction of the axis of the tubes and perpendicular to this axis, in order to follow the thermal variations. Indeed, the tubes being free to rotate, their expansion according to their diameter does not cause any problem, and in addition, there is no problem of expansion in a plane perpendicular to the axis of the tubes, since the expansion of the hot belt is identical to that of the tubes.

On peut en outre prévoir des mancnons,tels que 26, interposés autour d'une broche 22, entre le support 24 de ceinture chaude et les supports tubulaires 18, pour transmettre à la ceinture chaude la poussée résultant de la dilatation axiale des tubes. Par ailleurs, ce montage particulier à l'invention permet un démontage facile, pièce par pièce, des différents tubes constituant la surface de captage, par simple enlèvement de la broche 22. One can also provide mancnons, such as 26, interposed around a spindle 22, between the support 24 of hot belt and the tubular supports 18, to transmit to the hot belt the thrust resulting from the axial expansion of the tubes. Furthermore, this particular mounting to the invention allows easy removal, piece by piece, of the various tubes constituting the collection surface, by simple removal of the pin 22.

Pour minimiser les contraintes thermiques, lorsque le récepteur est mis en température, on réalise une précontrainte à froid des tubes constituant les parois de ce récepteur. A cet effet, l'ensemble tubes-ceinture chaude ceinture froide est verrouillé, et la ceinture froide 28 est articulée sur une bielle 30 par l'intermédiaire d'une tige 32, mise sous tension appropriée par un vérin 34 (Figure 3), dont le point fixe se trouve sur la charpente 36. To minimize thermal stresses, when the receiver is brought to temperature, a cold prestressing of the tubes constituting the walls of this receiver is carried out. To this end, the hot tube-belt cold belt assembly is locked, and the cold belt 28 is articulated on a connecting rod 30 by means of a rod 32, appropriate tensioning by a jack 34 (FIG. 3), whose fixed point is on the frame 36.

Il résulte de la description qui précède que la conception et la réalisation originales des supports de tubes selon l'invention et leur fixation sur les ceintures froide et chaude permettent d'atteindre les objectifs fixés, définis ci-dessus : sécurité, dilatation, démontabilité et contraintes thermiques. It follows from the foregoing description that the original design and production of the tube supports according to the invention and their attachment to the cold and hot belts make it possible to achieve the objectives set, defined above: security, expansion, dismantling and thermal constraints.

Il demeure bien entendu que cette invention n'est pas limitée à l'exemple de réalisation décrit et représenté, mais qu'elle en englobe toutes les variantes.  It remains to be understood that this invention is not limited to the embodiment described and shown, but that it encompasses all variants thereof.

Claims (4)

REVENDICATIONS 1 - Récepteur solaire du type à fluide caloporteur monophasique, chauffé par les rayons solaires réfléchis par un champ d'héliostats, comportant un récepteur constitué d'une cavité dont la surface est cylindrique ou prismatique ayant une face avant ouverte placée dans le champ d'héliostats et des parois latérales et postérieure tapissées de tubes dans lesquels circule le fluide caloporteur, les tubes étant maintenus par un système de montage caractérisé en ce qu'il consiste à grouper les tubes (12-12') deux par deux, à souder chaque tube de la paire sur des pattes (14-14') constituées d'un fer plat, de façon à réaliser une surface de captage se présentant sous la forme de panneaux de tubes jointifs, et à souder les pattes de chaque paire de tubes sur un support tubulaire (20), lesdits supports tubulaires étant maintenus par des broches (22), elles-mêmes rendues solidaires des supports (24) de la ceinture chaude (16) du récepteur. 1 - Solar receiver of the monophasic coolant type, heated by the solar rays reflected by a field of heliostats, comprising a receiver made up of a cavity whose surface is cylindrical or prismatic having an open front face placed in the field of heliostats and side and rear walls lined with tubes in which the heat transfer fluid circulates, the tubes being held by a mounting system characterized in that it consists in grouping the tubes (12-12 ') two by two, to weld each tube of the pair on legs (14-14 ') made up of a flat iron, so as to produce a collection surface in the form of panels of contiguous tubes, and to weld the legs of each pair of tubes on a tubular support (20), said tubular supports being held by pins (22), themselves made integral with the supports (24) of the hot belt (16) of the receiver. 2 - Récepteur solaire selon la revendication 1, caractérisé en ce que la dilatation axiale des tubes est transmise à la ceinture chaude par l'intermédiaire de manchons (26) concentriques aux broches (22) et interposés entre le support de ceinture chaude et les supports tubulaires. 2 - Solar receiver according to claim 1, characterized in that the axial expansion of the tubes is transmitted to the hot belt via sleeves (26) concentric with the pins (22) and interposed between the hot belt support and the supports tubular. 3 - Récepteur solaire selon l'une des revendications 1 ou 2, caractérisé en ce que l'on réalise une précontrainte à froid des panneaux de tubes, pour minimiser leur contrainte thermique lorsque le récepteur est mis en température. 3 - Solar receiver according to one of claims 1 or 2, characterized in that a cold prestressing of the tube panels is carried out, to minimize their thermal stress when the receiver is brought to temperature. 4 - Récepteur solaire selon la revendication 3, caractérisé en ce que la précontrainte à froid est réalisée à l'aide d'un vérin (34) attelé à une bielle (30) articulée sur une tige (32) solidaire de l'ensemble ceinture froide ceinture chaude - panneau de tubes.  4 - Solar receiver according to claim 3, characterized in that the cold prestressing is carried out using a jack (34) coupled to a connecting rod (30) articulated on a rod (32) integral with the belt assembly cold hot belt - tube panel.
FR8111503A 1981-06-11 1981-06-11 Tubular solar heat collector - has prestressed tubing mounted in pairs, onto frame, using removable spindles Granted FR2507754A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8111503A FR2507754A1 (en) 1981-06-11 1981-06-11 Tubular solar heat collector - has prestressed tubing mounted in pairs, onto frame, using removable spindles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8111503A FR2507754A1 (en) 1981-06-11 1981-06-11 Tubular solar heat collector - has prestressed tubing mounted in pairs, onto frame, using removable spindles

Publications (2)

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FR2507754A1 true FR2507754A1 (en) 1982-12-17
FR2507754B1 FR2507754B1 (en) 1984-03-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE682498A (en) * 1965-06-15 1966-12-14
FR2431101A1 (en) * 1978-06-30 1980-02-08 Fives Cail Babcock Solar heater - comprising parallelepipedal cavity with open front face in focal plane of heliostats and tubes carrying fluid covering walls
FR2438804A1 (en) * 1978-10-10 1980-05-09 Babcock & Wilcox Co SOLAR BOILER
DE2906114A1 (en) * 1979-02-17 1980-08-28 Heinrich Landgrebe Solar heating system for sheet metal roof - has heat collecting tubes welded to sheeting without damage to sheets
GB2060860A (en) * 1979-09-17 1981-05-07 Kraftwerk Union Ag Solar power installation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE682498A (en) * 1965-06-15 1966-12-14
FR2431101A1 (en) * 1978-06-30 1980-02-08 Fives Cail Babcock Solar heater - comprising parallelepipedal cavity with open front face in focal plane of heliostats and tubes carrying fluid covering walls
FR2438804A1 (en) * 1978-10-10 1980-05-09 Babcock & Wilcox Co SOLAR BOILER
DE2906114A1 (en) * 1979-02-17 1980-08-28 Heinrich Landgrebe Solar heating system for sheet metal roof - has heat collecting tubes welded to sheeting without damage to sheets
GB2060860A (en) * 1979-09-17 1981-05-07 Kraftwerk Union Ag Solar power installation

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Publication number Publication date
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