WO2011070180A1 - Module de capteur solaire - Google Patents

Module de capteur solaire Download PDF

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Publication number
WO2011070180A1
WO2011070180A1 PCT/ES2009/000562 ES2009000562W WO2011070180A1 WO 2011070180 A1 WO2011070180 A1 WO 2011070180A1 ES 2009000562 W ES2009000562 W ES 2009000562W WO 2011070180 A1 WO2011070180 A1 WO 2011070180A1
Authority
WO
WIPO (PCT)
Prior art keywords
bars
cord
solar collector
collector module
nodes
Prior art date
Application number
PCT/ES2009/000562
Other languages
English (en)
Spanish (es)
Inventor
Patrick Marcotte
Kenneth Biggio
Edmund Kenneth May
Kerry Manning
Rachel Backes
Janina Nettlau
Rick Sommers
Original Assignee
Abengoa Solar New Technologies, S.A.
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 Abengoa Solar New Technologies, S.A. filed Critical Abengoa Solar New Technologies, S.A.
Priority to PCT/ES2009/000562 priority Critical patent/WO2011070180A1/fr
Priority to ES201250014A priority patent/ES2400275B1/es
Publication of WO2011070180A1 publication Critical patent/WO2011070180A1/fr
Priority to CL2012001496A priority patent/CL2012001496A1/es
Priority to ZA2012/04937A priority patent/ZA201204937B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/10—Arrangement of stationary mountings or supports for solar heat collector modules extending in directions away from a supporting surface
    • F24S25/13—Profile arrangements, e.g. trusses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • 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
    • Y02E10/47—Mountings or tracking

Definitions

  • This invention relates to the solar collector modules of those used in a solar energy concentration plant, more specifically, to the structures that are used to maintain or support the mirrors and the receivers in charge of concentrating the solar radiation.
  • support structures are used for the mirrors responsible for concentrating the solar radiation.
  • all of them also have a device that allows them to be oriented towards the sun, called solar tracker, which allows a very accurate tracking of the sun that leads to obtaining high yields.
  • the invention claimed here refers to the support structure of the module, without going into claiming the solar tracker that can then be coupled to it.
  • lattice structure that determines arms through which defines a parabolic-cylinder shape for the placement of the mirrors.
  • Each of the arms is formed by a set of joined profiles, on which a profile curved according to the curvature of the cylinder-parabolic formation of the component mirrors of the thermal concentrator is arranged on the front edge.
  • only one type of lashing pieces is used independently of the load that they support in the structure and therefore not taking into account the difference of loads supported in the different points of the structure.
  • the claimed invention aims to disclose a structure that, despite being formed by a lattice structure of the knots and bars type, has a series of characteristics that make it differ substantially. of those known in the state of the art, providing a series of advantages, both of structural strength, since it is possible to support higher loads, as in the manufacturing process, as it is greatly simplified, as in costs getting, for the same mechanical response an important cheapening or for the same cost, better technical characteristics.
  • the invention consists of a structure that serves as support for the mirrors or receivers of a solar concentration module.
  • the structure comprises a bar structure made preferably of aluminum, so that it resists weather aggressions, taking into account that its entire useful life will work outdoors.
  • Laces are called those bars that run the structure from one end to another longitudinally and diagonal those that connect one node with another following a diagonal line.
  • the struts are the pieces that make up the final sections of the bars, where they are connected to the nodes and designed to withstand pressure. They are usually of circular or semicircular geometry.
  • this structure or frame has a series of characteristics that differentiate it from the structures known up to now in the state of the art. These characteristics are:
  • the proposed invention minimizes the size of the section of the node assuming significant savings for the manufacturing process by extrusion; It also allows the use of larger, stiffer and stronger bars and makes the fin elements stronger and more dimensioned. more stable, both during the manufacturing process and during its use.
  • the recessed fins of the node allow several alternatives for the connection of the struts of the bars to the nodes.
  • the use of a connection type or another will depend on the load that supports the structure, the size of the props, the size of the nodes and manufacturing limitations.
  • connection of the struts to the nodes could have a single joining element, but they are usually used more to achieve a fixed or rigid grip. This fact of having multiple joining elements increases the strength of the structure allowing the node to support both the axial loads and the moments.
  • a design option is that the bars have pre-installed connectors on the struts which are attached to the node directly to assemble the structure.
  • a connector is an additional structural element attached to the bar and has features such as holes that facilitate the connection of the bar to the node.
  • the connectors provide a number of advantages, including facilitating the transition between the shape of the bar and the shape of the node, while at the same time providing the structure with additional strength.
  • the conventional designs of structures or frames are designed assuming that they will support symmetrical loads, through a moment transfer assembly.
  • the structures are designed thinking of distributing loads as evenly as possible between their bars. This makes the bars all the same size (which facilitates connections to the node) while minimizing the strength requirements for individual bars.
  • a structure can be designed to concentrate the main load in a specific location, specifically in one of the vertices, in such a way that it directly transmits the force from that point through the entire structure, until it leaves through another of the vertices.
  • the main advantage of an asymmetric structure of this type is the efficiency of the material.
  • one side will have the structure more reinforced than the other and the latter may even have fewer bars.
  • the total structure can meet design requirements with less material.
  • Another feature presented by the structures of the invention is the fact of dividing the cords (the large longitudinal bars that run the structure from one end to the other) in smaller individual elements, that is, instead of having a large cord. a single piece that runs through the entire structure, is divided into a series of smaller individual segments.
  • the individual elements along the cord axis can be individually optimized to maximize the structural and material efficiency, as previously stated for certain bars.
  • the section of said bead must be constant along its entire length, due to the nature of the extrusion and assembly processes and this section must be dimensioned to solve the maximum load expected at any point of the cord axis. Dividing the cord, can We eliminate entire sections and reduce the section of others, depending on the load they will support, optimizing costs.
  • the omission of the cords can provide a significant cost savings, due to the reduction of the material required to make the structure, as well as the reduction of work required to assemble it.
  • the omission of a cord allows the independent placement of the nodes that, otherwise, could have been determined by the position of the cords.
  • the nodes and their associated nodes can be placed in structurally more efficient locations.
  • a cord of length equal to the total length of the collector is used.
  • the struts of the bars of the structure are connected directly to this finned cord by any appropriate method.
  • spacers can be provided to adequately distance the mirror or mirrors from the structure. These spacers are extruded pieces that act as a bridge between geometry structures flat and the mirrors, of parabolic geometry. These spacers are located. at the ends of the collector, where the difference in height between the two is greater.
  • the mirrors can be supported directly by the structure without the need to install a longitudinal belt, more specifically, by the cords and bars of the ends of the module.
  • the cord fulfills a double function of acting as a structural element and as a support for the mirror, with the consequent saving of material by not needing a strap and accentuated here since a very long strap would be required.
  • This structure is designed especially for its application as support or frame of the mirrors of a solar collector, but its extension to other fields of the industry that require similar characteristics is not ruled out.
  • FIG. 1A Structure of the solar collector module
  • FIG. 1 B Structure of the solar collector module
  • Figure 8 Plates bent as a connector
  • Figure 11A Structure elevation with reinforced bars
  • Figure 11 B Plan view of a structure with reinforced bars
  • Figure 14A Example of the node used with discretized string segments
  • Figure 14B Example of the node used with discretized cord segments
  • Figure 15 Structure with cord segments of non-uniform sections along the cord axis
  • Figure 19 Rear view of the structure with displaced nodes and eliminated cords
  • FIGS 1A and 1B show the terms used to describe the different parts of a structure of a solar collector module, according to the preferred embodiment of the invention.
  • the connecting elements of several rods (101) are called nodes, those rods that cross the structure from one end to the other longitudinally (104) and diagonal (102) are those that connect one node (101) to another following a diagonal line.
  • Figure 1A is also shown the arm (03) that transmits the pair of the solar tracker.
  • a node (201) is observed to connect a series of bars.
  • the node (201) has fins of rectangular section (202) designed to be able to connect other members of the structure, such as cords (203) or other bars (204).
  • the size and orientation of the rectangular fins (202) can be varied depending on the size of the members to be connected and the geometry desired for the structure. To increase the strength, the fins (202) can be reinforced internally or even made solid.
  • the different elements of the structure, including the cords (203) and the bars (204), are preferably tubular, whether circular, semicircular, rectangular, or of any other geometry. Depending on the application, it can be used for some or all members of the structure, "I" section forms, channels, solid forms, and so on.
  • the node (201) of the preferred embodiment is configured to fit over the outer or peripheral edge of the through cord (203).
  • Figure 3 illustrates a preferred embodiment of the node (201), as well as other alternative geometries (301), (302) having recessed fins of rectangular sections (202).
  • Each tab rectangular section (202) includes two side walls and a wall (303) that joins the side walls, forming a shape of the box.
  • the side walls are parallel, and the rectangular recessed sections, although other geometries would be possible, including recesses with non-parallel walls, of different sizes or of different shapes.
  • Figure 4 illustrates a possible technique for joining the bars to the box-shaped fins.
  • the connecting elements (401) used can be nails, screws or any equivalent known in the state of the art.
  • the node cache allows several alternatives for the connection of the bars to the nodes.
  • the bars can be of circular, square or rectangular section, with the flat sides or in any other convenient way and not all the bars of a structure have to have the same geometry.
  • the struts or final part of the bars may contain flat faces to achieve a direct connection, for example in case they had a hexagonal or octagonal section. In this case, it would not be necessary to use any additional connector to connect to the node if the bar or the strut is correctly fitted.
  • the end of the bar (501) is notched and the sides have holes compatible with the box-shaped fin (502) of the node (503). In this joining alternative, no additional connector is required.
  • Figure 6 shows another connection example, this time using a flat plate connector.
  • one or more flat plates (601) are attached to the bars (602), for example using joining elements (not shown) such as rivets, screws, welding or other means.
  • the flat plates (601) are provided with holes (603) or other means compatible with the fin (604) of the node (605).
  • Figure 7 shows two views of another type of connector.
  • one or more tubular connectors (701) are attached to the bars (702).
  • the connectors (701) are rectangular bars that have been cut with a miter saw at the desired angle.
  • the hollow tubular configuration of the connectors (701) can provide additional strength and rigidity to the joint.
  • Figure 8 shows two views of another alternative connector.
  • one or more plates (801) are bent to achieve a compatible connection between the bar (802) and the node (803).
  • the plates (801) can be made of stamped metal and can be attached internally or externally to the bar (802). This embodiment is especially suitable for making connections between long rods to nodes.
  • Figure 9 shows a cord type connector according to another embodiment.
  • This type of connectors are stamped and rounded pieces that provide better support to the structure than the connectors (701), for example, due to the angles to which the load directs.
  • one or more connectors (901) can be manufactured by stamping in a composite form and joining the bars as they are attached to the bar (902) of the figure.
  • Figure 10 shows a connector (1001) according to another alternative embodiment.
  • the connector (1001) can be manufactured by stamping a single piece of metal.
  • the bands or belts (1002) are formed alternately on opposite sides of a flat portion (1003) (like a spiral) and form a receptacle or connector that can receive the bar (not shown). While the receptacle is represented circular in Figure 10, other forms can be chosen.
  • the connector (1001) can be attached to the bar of the structure and also tied to the node (not shown in the figure) using joining elements in the holes (1004) or any other alternative joining method.
  • the structure is designed so that it concentrates the main load in a determined location of the structure, specifically a corner, in such a way that it directly transmits the force from that corner through the entire structure, until it leaves another corner.
  • Figures 11A and 1B illustrate oblique and top views of a structure in which certain bars (1101) have been reinforced to support specific loads, for example loads accumulated on an edge.
  • the "reinforced structure within the overall structure” shown in Figures 1 A and 11B is an example of an asymmetric structure.
  • the structure or framework is symmetrical through a plane of the center, but asymmetric on a longitudinal plane of the center. Some bars of those located on one side of the center longitudinal plane are much larger than the corresponding bars on the other side of the center longitudinal plane to meet asymmetric loading conditions. Some bars may even have no counterparts on the opposite side.
  • This improvement consists of dividing the longitudinal cord that runs through the structure in smaller cords. In an example of realization we could be going from a cord of 12 meters to four cords of 3 meters.
  • Figures 14A and 14B illustrate the nodes of a preferred embodiment (1401) and (1402) using these reduced segments.
  • Figure 15 shows a view of the lower surface of a manifold module according to this embodiment.
  • an edge cord comprises three cord sections (1501), (1502), and (1503).
  • the three sections may have different load requirements, such that the section (1502) of the center cord does not need to bear the load as high as those experienced by the sections (1501) and (1503).
  • the section (1502) of the center bead may have a smaller section (for example a smaller diameter), so that material is saved and the cost is decreased, with respect to making the cord section (1502) as large as sections (1501) and (1503).
  • Other geometries of the structure can give rise to different sections of the cord, be they larger or smaller.
  • Figure 16 shows a view of the collector, in which at least one node moves.
  • the center node (1601) of a bottom edge (1602) of the structure (1603) can be moved up and in, so that the nodes on that edge (1602) of the frame are not colli- neal
  • FIG 17 shows an oblique view of a structure that has omitted one of the traditional lower cords between the nodes (.1701). The omission of bars from the structure is especially convenient when the cords have been divided and nodes are used such as those shown in Figures 14A ' and 14B.
  • the arrangement of the structure is traditional, with nodes in the usual locations of the cords that are collinear.
  • Figure 18 illustrates a rear view of this arrangement.
  • the omission of a cord allows the independent placement of the nodes that, otherwise, could have been determined by the position of the cords.
  • the nodes and their associated nodes can be placed in structurally more efficient locations.
  • Figure 19 illustrates a rear view of a frame in which a central node (1901) of a lower edge (1902) of a structure has moved up and into the structure. It should be noted that the node (1901) is not connected by a bar with the edge (1902).
  • Figure 20 illustrates that bar (2001), to which several struts (2002) are connected.
  • the bars of the structure are connected directly to this finned cord by any method, either those described above or others.
  • Figure 21 illustrates another example of assembly to make the connections between the elements of the structure.
  • parts (2101), (2102) are attached to a cord (2103), for example using rivets, screws, bolts, welding. . or other appropriate means.
  • This concept of the node creates multiple parallel fin systems to connect the struts (not shown) between the fins.
  • Figure 22 illustrates an oblique view of a part of a manifold module.
  • the curved mirror (2201) may be fabricated from one or more segments of aluminized glass, polished metal or other suitable reflective material.
  • the structure may have the shape of a parabolic cylinder.
  • the structure may have approximately the curved shape of the mirror (2201), but the transition elements can resolve the remaining shape differences.
  • the separators (2202) are distributed along a bead (2203) at the end of the manifold.
  • the separators are distributed along a bead (2203) at the end of the manifold.
  • the mirror (2201) is fixed with the spacers (2202) by any convenient means of attachment.
  • the separators (2202) are preferably manufactured by extrusion, but can be manufactured by other means.
  • the individual spacers positioned spaced along the cord 2203 and other members of the structure can significantly reduce the material requirements for the module with respect to other techniques for holding the mirror 2201 in the proper position.
  • This system is designed especially for application in structures or frames for mirrors of receivers or solar collectors, but its extension to other fields of the industry that require similar characteristics is not ruled out.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

L'invention porte sur un module de capteur solaire qui est utilisé dans une usine de concentration d'énergie solaire, plus particulièrement, sur les structures qui sont utilisées pour maintenir ou supporter les miroirs et les récepteurs chargés de concentrer le rayonnement solaire. Cette structure comprend une série de caractéristiques qui augmentent son efficacité par rapport à celles connues : ajout d'ailettes en forme de caisse dans les noeuds pour faciliter la liaison des barres, utilisation de connecteurs plats ou creux pour fixer la barre au noeud, réalisation d'une structure asymétrique avec des barres beaucoup plus renforcées que d'autres, qui seront celles qui supporteront la charge, division du cordon longitudinal qui parcourt la structure en segments rendus discrets et élimination de ceux qui ne réalisent aucun effort, déplacement des noeuds à des emplacements plus optimaux et création d'un noeud de grande longueur (cordon) auquel sont accouplées directement les barres grâce aux ailettes sans avoir besoin de noeuds.
PCT/ES2009/000562 2009-12-07 2009-12-07 Module de capteur solaire WO2011070180A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/ES2009/000562 WO2011070180A1 (fr) 2009-12-07 2009-12-07 Module de capteur solaire
ES201250014A ES2400275B1 (es) 2009-12-07 2009-12-07 Módulo de colector solar
CL2012001496A CL2012001496A1 (es) 2009-12-07 2012-06-07 Modulo de colector solar que sirve de soporte de espejos u otros medios de concentracion solar que comprende una estructura asimetrica de barras tubulares, en que para la conexion de las barras tubulares a los nodos o directamente al cordon, se instalan unas aletas de seccion transversal rectangular tipo caja.
ZA2012/04937A ZA201204937B (en) 2009-12-07 2012-07-02 Solar collector module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2009/000562 WO2011070180A1 (fr) 2009-12-07 2009-12-07 Module de capteur solaire

Publications (1)

Publication Number Publication Date
WO2011070180A1 true WO2011070180A1 (fr) 2011-06-16

Family

ID=44145123

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2009/000562 WO2011070180A1 (fr) 2009-12-07 2009-12-07 Module de capteur solaire

Country Status (4)

Country Link
CL (1) CL2012001496A1 (fr)
ES (1) ES2400275B1 (fr)
WO (1) WO2011070180A1 (fr)
ZA (1) ZA201204937B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012089870A1 (fr) * 2010-12-30 2012-07-05 Europea De Construcciones Metálicas, S.A. Module support pour collecteur solaire à sous-structure triangulaire
US10436478B2 (en) 2011-04-19 2019-10-08 Abengoa Solar Llc Structural frame and solar collector module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1559369A (fr) * 1967-03-25 1969-03-07
US4122646A (en) * 1977-06-08 1978-10-31 Research-Cottrell, Inc. Equilateral derrick structure
WO1992018715A1 (fr) * 1991-04-19 1992-10-29 Lk Limited Structures porteuses
EP1903155A1 (fr) * 2006-09-22 2008-03-26 Gossamer Space Frames Cadres d'espace et agencement de noeud de connexion pour ceux-ci

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1559369A (fr) * 1967-03-25 1969-03-07
US4122646A (en) * 1977-06-08 1978-10-31 Research-Cottrell, Inc. Equilateral derrick structure
WO1992018715A1 (fr) * 1991-04-19 1992-10-29 Lk Limited Structures porteuses
EP1903155A1 (fr) * 2006-09-22 2008-03-26 Gossamer Space Frames Cadres d'espace et agencement de noeud de connexion pour ceux-ci

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012089870A1 (fr) * 2010-12-30 2012-07-05 Europea De Construcciones Metálicas, S.A. Module support pour collecteur solaire à sous-structure triangulaire
ES2385591A1 (es) * 2010-12-30 2012-07-27 Europea De Construcciones Metálicas S.A. Módulo soporte para colector solar con subestructura triangular.
US9212831B2 (en) 2010-12-30 2015-12-15 Europea De Construcciones Metalicas, S.A. Support module for a solar collector having a triangular substructure
US10436478B2 (en) 2011-04-19 2019-10-08 Abengoa Solar Llc Structural frame and solar collector module

Also Published As

Publication number Publication date
ES2400275B1 (es) 2013-11-11
CL2012001496A1 (es) 2013-06-07
ZA201204937B (en) 2013-03-27
ES2400275A1 (es) 2013-04-08

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