WO2019166672A1 - Bras de support pour collecteur solaire - Google Patents

Bras de support pour collecteur solaire Download PDF

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Publication number
WO2019166672A1
WO2019166672A1 PCT/ES2018/070147 ES2018070147W WO2019166672A1 WO 2019166672 A1 WO2019166672 A1 WO 2019166672A1 ES 2018070147 W ES2018070147 W ES 2018070147W WO 2019166672 A1 WO2019166672 A1 WO 2019166672A1
Authority
WO
WIPO (PCT)
Prior art keywords
solar collector
solar
support arm
arm
arms
Prior art date
Application number
PCT/ES2018/070147
Other languages
English (en)
Spanish (es)
Inventor
David MARTÍN CASERO
Original Assignee
Shouhang European, S.L.
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 Shouhang European, S.L. filed Critical Shouhang European, S.L.
Priority to PCT/ES2018/070147 priority Critical patent/WO2019166672A1/fr
Publication of WO2019166672A1 publication Critical patent/WO2019166672A1/fr

Links

Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
    • H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
    • 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
    • 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
    • Y02E10/50—Photovoltaic [PV] energy

Definitions

  • the present invention is part of the technical field of renewable energy and more specifically in equipment and parts of equipment related to solar energy.
  • a solar collector support arm is described which can be used in parabolic cylinder thermosolar collectors, photovoltaic collectors and piano-type thermosoiaries.
  • Parabolic trough solar thermal collectors are essential elements of some solar thermal power generation plants.
  • a plurality of panels reflecting sunlight are arranged to form a parabola that allows the sun rays incident on the panels to be reflected by a receiver placed in the focus of the parabola forming the panels.
  • Inside a central tube circulated a fluid that heats and transport the heat absorbed from the sun's rays.
  • the panels rotate around an axis so that depending on the position of the sun it varies throughout the day, the collector always focuses the sun's rays on the central tube.
  • the photovoltaic collectors are also known from the state of the art, which comprise photovoltaic panels that do not reflect the sun's rays towards a receiver but directly transform solar energy into electrical energy.
  • Parabolic trough collectors base their operation on solar tracking to an axis to have a commercially acceptable efficiency.
  • photovoltaic followers can work fixed, with one axis of movement or with two axes of movement, resulting in the more angles of rotation the greater the efficiency of the system.
  • Solar trackers with a rotation axis join their pickup surfaces (either in the form of a parabola or with a flat shape) to a torsion element arranged along the axis around which the panels rotate.
  • the panels are supported by metal frameworks that are rigidly attached to the torsion element.
  • the metal frameworks of these collectors are formed by structures with a plurality of bars joined together. This is because the arms must be strong enough to be able to support the weight of the panels, their own weight and also the possible additional loads such as wind, snow, earthquake loads, etc. The arms should deform as little as possible so as not to reduce the optical efficiency of the collector. Additionally, this set of bars is only supported by its connection to the torsion element, its opposite end being cantilevered.
  • the torsion element provides rigidity to the set of arms keeping them in the proper position in addition to providing torsional strength.
  • EP26G257Q which describes a support structure for parabolic trough solar collector comprising a torsion tube, a first and a second set of arcuate ribs whose surfaces form concave areas.
  • the arched ribs extend so that a plane that passes through one side of an arched rib through its proximal end! and the end is far! of the same arched rib formed with a piano perpendicular to! longitudinal axis of the torsion tube an angle that is in the range preferably from 1 G e to 30 e .
  • US546Q163 a collector of solar radiation collection for steam generation is described.
  • It comprises a channel-shaped mirror that extends in a longitudinal direction and that receives and reflects the radiation in an absorption line that encloses in its interior a steam generating tube in which the water is heated, vaporized and overheated. Heat is transferred transversely from the absorption line to! tube of! steam generator using heat pipe segments spaced longitudinally along the absorption line.
  • US8256413 proposes a parabolic manifold that includes a parabolic mirror support structure with a parabolic mirror surface, and a structure of support that supports an absorbent tube.
  • the support structure of the parabolic mirror and the support structure of! Absorbents are mechanically fixed in a fixed position with each other in a torsion tube that is disposed below the surface of the parabolic mirror, and mounted together with the surface of the parabolic mirror so as to rotate about a longitudinal axis of rotation of the cylinder collector parabolic.
  • the torsion tube is arranged so that the axis of longitudinal rotation of the parabolic trough collector coincides with the central longitudinal axis of the torsion tube.
  • parabolic trough collectors Another known solution for parabolic trough collectors is the collection in the ES2403164 patent. It describes an arm for parabolic trough solar collector that is wedge-shaped and comprises a sheet stamped with a plurality of ribs between which a plurality of laminar portions are found. The presence of laminar portions between the ribs is essential for the described arm since they provide the stiffness and bearing capacity that is sought in said invention.
  • solar collectors can be divided into parabolic trough solar collectors and piano solar collectors.
  • the basic elements of any solar collector are a plurality of supports to the ground, arranged longitudinally along an axis of rotation of the collector, a torsion element, solar panels, a metallic framework for supporting the solar panels and, in the Parabolic cylinder type collectors, at least one solar thermal receiver element.
  • the axis of rotation of the collector corresponds to the central axis of the torsion element. Said axis of rotation of the collector is the line on which the collector rotates and is generally oriented from north to south (so that the collector rotates following the direction of the eastern sun, where it rises, to the west, where it is placed ).
  • each solar collector of whatever type, comprises a high number of bars that make up its metallic support framework.
  • a metal support element is described which is, more specifically, an arm. This arm is configured to be installed in cantilever, joined only by one of its ends to the torsion element of the manifold.
  • the proposed support arm joins the torsion element and is, in conjunction with a plurality of additional metal support elements (preferably other support arms), responsible for supporting the weight of the solar panels and the possible additional charges due for example to environmental conditions such as wind loads.
  • a solar collector can have 360 arms. Each 36 arms are arranged in each solar collector module and each pair of arms supports one or more parabolic cylinder collector solar panels or one or more flat solar collector solar panels. In a 50MW solar plant, more than 200,000 arms would be needed. This is why it is so important to reduce costs and develop a lift arm that is easy to manufacture, whose production is scalable and easy to install.
  • the present invention describes a solar collector lift arm that can be used in parabolic and flat-type solar collectors. It is a reversible arm tai that, depending on how it is oriented, allows its connection to a torsion element of a solar collector and at least a solar panel of parabolic trough collector or a torsion element of solar collector and at least to a flat panel solar panel.
  • the arm configuration is truss equilateral
  • the arm comprises a plurality of intermediate openings that can take any geometric shape and are designed so that the arm undergoes minimal deformation and has a maximum bearing capacity. This allows the arm to be light, which also contributes to reducing self-weight loads. Also, the configuration of sheet metal stamped with a plurality of openings allows to support large cantilever loads with a minimum thickness of material.
  • the proposed arm comprises a curved side and another straight side, opposite each other.
  • This supposes a great advantage over the metallic frameworks of support of the state of the art that are designed to work in a main sense, losing bearing properties in the event that the main loads to be supported are turned upside down. Thanks to the configuration of the arm it is reversible and can be used with the curved side or the straight side acting as a support for the panels Having sufficient bearing capacity in both cases. That is, the same arm is orientable to be used as a parabolic trough collector or as a flat collector.
  • the curved side is oriented upwards, that is, facing the sun.
  • the arm preferably comprises seats that fix the position of all solar panels and hold them at a certain distance from the focus of the parabola they form. In this case the straight side is oriented towards the ground.
  • the straight side of the arm is facing upwards, that is, facing the sun.
  • the curved side is oriented towards the ground. Therefore, when a plurality of arms is used in a flat collector, the flat sides of the arms are oriented towards the sun and support a plurality of solar panels forming a single surface.
  • the arms on both sides of the torsion element are arranged so that their fourth sides form a straight line.
  • the curved sides of the arms are arranged facing up to receive the curved solar panels corresponding to this type of solar collector.
  • the straight sides are arranged facing up to receive the flat solar panels corresponding to this type of solar collector.
  • the arms are arranged in the solar collector perpendicular to the longitudinal axis of the torsion tube.
  • the production plants can be continuously producing said arms.
  • the production plants of this type of parts worked on projects so that only the arms or supporting structures necessary for a particular solar collector order were stamped or manufactured. Subsequently, the dies remained unused until the next order.
  • the use of the dies is much greater and continuous or almost continuous production can be achieved in the production plants (the arms are manufactured and can be used interchangeably in parabolic trough collectors or in otovoltaic or thermo-solar collectors of type piano).
  • the design of the proposed arm allows the manufacture of arms to continue even in periods when there are no concrete projects precisely because they will be able to be used in any type of solar collector (and therefore any type of project). In this way, times in each project are also reduced as part of the arms may already be made when the project begins.
  • the proposed arm ensures good mechanical behavior with the minimum possible weight and thickness.
  • the design of the described arm allows to minimize the error of the parabola or of the inclination of the solar panels once installed in the arm because there are few points of union between the arm and said solar panels.
  • Figure 2. Shows a comparison between the solar collector support arms arranged in a parabolic cylinder solar collector and the solar collector support arms arranged in a flat solar collector.
  • Figure 3. Shows a view of two support arms of the present invention in a solar collector of parabolic cylinder type.
  • Figure 4.- Shows a view of the two support arms of the present invention in a flat-type solar collector.
  • Figure 5. Shows a view of the support arm of the solar collector with a zoom in which there are some flanges that are part of the arm plate and that are oriented perpendicular to the longitudinal direction of the arm.
  • the solar collector support arm (1) described is configured to be connected to a torsion element (2) and at least one solar panel.
  • the arm (1) is formed by a sheet stamped with a main surface with a plurality of openings (3) intermediate therein, distributed along its length.
  • the arm (1) has, as seen in Figure 1, first side (4) with first joining means and intended to be attached to the torsion element (2) and a second side (5), opposite the first side (4) configured to be cantilevered.
  • the key of the proposed arm (1) is that it comprises a curved third side (6) intended to be attached to solar panels of parabolic trough cylinder (7) and a straight fourth side (8) intended to be attached to solar panels of solar collector flat (9).
  • the arm (1) is oriented so that it can be used in a parabolic trough collector.
  • the third side (6) is connected to a solar panel of parabolic trough solar collector (7).
  • the third side (6) has a curvature configured to hold at least one solar panel of parabolic trough solar collector (7) and has second joining means configured to allow attachment to at least one solar panel of parabolic trough solar collector (7 ).
  • the fourth side (8) is opposite to the third side (6).
  • Said fourth side (8) is straight and starts from the first side (4) with an inclination so that, when two arms (1) are attached to the torsion element (2) the collector being oriented horizontally with respect to the ground and being the fourth side facing up, the fourth sides (8) of both arms (1) are aligned.
  • the fourth side (8) comprises third joining means configured to allow joining with at least one flat solar collector solar panel (9).
  • the specific configuration of the arm (1) with the third side (6) and the fourth side (8) allows it to be used interchangeably with any type of manifold (parabolic or flat cylinder) as shown in Figure 2 It is simply it is necessary to change the orientation of the arm and join the solar panels to the corresponding side (6, 8).
  • FIG 3 an example of embodiment can be seen in which two arms (1) are arranged with the third side (6) facing up. Said arms (1) are connected in this embodiment to three parabolic trough collector panels (7).
  • the first side (4) of the arms (1) is that which is intended to be attached to the torsion element (2) of the solar collector in which they are installed.
  • FIG. 4 An exemplary embodiment is shown in Figure 4 in which two arms (1) are arranged with the fourth side (8) facing up.
  • this arrangement of the arms (1) is intended for joining the arms (1) with flat collector panels (9).
  • four flat-panel solar panels (9) have been attached to two arms (1).
  • the first side (4) of the arm (1) is the one intended for the connection with the torsion element (2).
  • the arm (1) additionally comprises a projection (10) in the perimeter of each opening (3) and / or in the perimeter of the arm (1) to reinforce its resistance .
  • a zoom has been shown in which the projections (10) can be observed. In this case you can see how there are projections (10) in the perimeter of the openings (3) and also in the perimeter of the main surface of the arm (1).
  • the projections (10) are arranged between 45 and 135 ® with respect to the main surface of the arm (1). More preferably they are arranged at 90 e of said main surface.
  • the projections (10) have a length between 5mm and 50mm. More preferably the length is between 10mm and 3Gmm. This length is the height of the projection (10) measured with respect to the main surface of the arm (1).
  • the stamped sheet that forms the arm (1) is made of galvanized carbon steel. Also preferably the sheet has a unique thickness of between 1 3mm and 2mm.
  • the arm (1) may additionally comprise support points and fixation of the panels (7, 9) in the form of seats.
  • Said seats are configured to support at least one solar panel of parabolic trough solar collector (7) or at least one flat solar collector solar panel (9). That is, the purpose of the seats is to facilitate the union between the solar panels (7.9) and the arm (1).
  • the seats are circular perforations in the projections (10) of the stamped arm plate (1), preferably between 3 and 15mm in diameter, through which the panel is screwed together to rigidly join it.
  • Each panel (7, 9) is supported on at least two arms (1) and two seats on each arm (1).
  • the arm (1) comprises seats, additionally comprising seat reinforcements for pieces of thickness between 5 and 2Qmm.
  • the seats allow the rigid connection of the arms (1) with the panels ⁇ 7, 9 ⁇ preferably by means of screws attached to the back of the panels (7, 9) and nuts to provide the required tightening.
  • the arm (1) is connected to the torsion element (2) by means of bolted joints and pins for the easy disassembly of the arm (1) of the solar collector in which it is installed for maintenance work.
  • the arms (1) may additionally comprise attachment means to a set of stiffening bars instead of the torsion element (2) such that when two adjacent arms (1) are arranged, they are joined together by these bars stiffeners. This embodiment is especially suitable in cases where it is expected that the solar collector, and therefore the arms (1), have a great distance between the first side (4) and the second side (5), being necessary to modify the center of gravity of the collector and thus bring it closer to the vertex of the parabola, to allow the assembly to rotate by applying a smaller torque.
  • the arms (1) are formed with a stamped sheet.
  • a procedure is followed comprising the stages of cutting the development, stamping and punching.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

Bras de support pour collecteur solaire. Le bras (1) est configuré pour être connecté à un élément de torsion (2) et au moins à un panneau solaire, formé d'une couche marquée avec une pluralité d'ouvertures (3) intermédiaires. Il comprend un premier côté (4) destiné à rester relié à l'élément de torsion (2); un deuxième côté (5) opposé au premier côté (4); un troisième côté (6) courbe ayant une courbure configurée pour soutenir au moins un panneau solaire de collecteur solaire cylindro-parabolique (7); et un quatrième côté (8) opposé au troisième côté (6) qui est droit et qui part du premier côté (4) avec une inclinaison telle que, quand les deux bras (1) sont disposés reliés à l'élément de torsion, avec le collecteur orienté horizontalement par rapport au sol, le quatrième côté orienté vers le bas, les quatre côtés (8) des deux bras (1) restent alignés.
PCT/ES2018/070147 2018-02-28 2018-02-28 Bras de support pour collecteur solaire WO2019166672A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/ES2018/070147 WO2019166672A1 (fr) 2018-02-28 2018-02-28 Bras de support pour collecteur solaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2018/070147 WO2019166672A1 (fr) 2018-02-28 2018-02-28 Bras de support pour collecteur solaire

Publications (1)

Publication Number Publication Date
WO2019166672A1 true WO2019166672A1 (fr) 2019-09-06

Family

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Family Applications (1)

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PCT/ES2018/070147 WO2019166672A1 (fr) 2018-02-28 2018-02-28 Bras de support pour collecteur solaire

Country Status (1)

Country Link
WO (1) WO2019166672A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2274710A1 (es) * 2005-09-19 2007-05-16 Sener, Ingenieria Y Sistemas, S.A. Brazo de sustentacion, soporte de colector solar cilindro-parabolico y procedimiento para fabricar el brazo.
US20110000479A1 (en) * 2009-07-01 2011-01-06 Mecanizados Solares, S.L. Solar tracker with thermal concentration
ES2362914A1 (es) * 2010-01-05 2011-07-15 Urssa Energy, S.L. Colector solar cilindro-parabólico y proceso para su montaje.
ES2375887A1 (es) * 2010-08-05 2012-03-07 Abengoa Solar New Technologies S.A. Estructura con vigas de sujeción de reflector primario.
CN104697217A (zh) * 2013-12-10 2015-06-10 首航节能光热技术股份有限公司 用于安装太阳能槽式反光镜玻璃的可调支撑臂
CN106524533A (zh) * 2016-11-11 2017-03-22 内蒙古旭宸能源有限公司 用于太阳能供热的低成本高精度槽式聚光集热器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2274710A1 (es) * 2005-09-19 2007-05-16 Sener, Ingenieria Y Sistemas, S.A. Brazo de sustentacion, soporte de colector solar cilindro-parabolico y procedimiento para fabricar el brazo.
US20110000479A1 (en) * 2009-07-01 2011-01-06 Mecanizados Solares, S.L. Solar tracker with thermal concentration
ES2362914A1 (es) * 2010-01-05 2011-07-15 Urssa Energy, S.L. Colector solar cilindro-parabólico y proceso para su montaje.
ES2375887A1 (es) * 2010-08-05 2012-03-07 Abengoa Solar New Technologies S.A. Estructura con vigas de sujeción de reflector primario.
CN104697217A (zh) * 2013-12-10 2015-06-10 首航节能光热技术股份有限公司 用于安装太阳能槽式反光镜玻璃的可调支撑臂
CN106524533A (zh) * 2016-11-11 2017-03-22 内蒙古旭宸能源有限公司 用于太阳能供热的低成本高精度槽式聚光集热器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 48473, Derwent World Patents Index; AN 2015-48473Y *

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