WO2016030558A1 - Suiveur solaire à piédestal en béton armé - Google Patents

Suiveur solaire à piédestal en béton armé Download PDF

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Publication number
WO2016030558A1
WO2016030558A1 PCT/ES2015/070571 ES2015070571W WO2016030558A1 WO 2016030558 A1 WO2016030558 A1 WO 2016030558A1 ES 2015070571 W ES2015070571 W ES 2015070571W WO 2016030558 A1 WO2016030558 A1 WO 2016030558A1
Authority
WO
WIPO (PCT)
Prior art keywords
pedestal
solar tracker
concrete
ground
tracker according
Prior art date
Application number
PCT/ES2015/070571
Other languages
English (en)
Spanish (es)
Inventor
Xabier Lecube Inchausti
Francisco Javier GONZÁLEZ CABEZUELO
Iker FEBRER VEGUEIRA
Sabin FERNÁNDEZ UGARTE
Original Assignee
Sener, Ingeniería Y Sistemas, 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 Sener, Ingeniería Y Sistemas, S.A. filed Critical Sener, Ingeniería Y Sistemas, S.A.
Priority to MA38953A priority Critical patent/MA38953B1/fr
Priority to CN201580046793.3A priority patent/CN106796053A/zh
Publication of WO2016030558A1 publication Critical patent/WO2016030558A1/fr

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
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
    • F24S25/617—Elements driven into the ground, e.g. anchor-piles; Foundations for supporting elements; Connectors for connecting supporting structures to the ground or to flat horizontal surfaces
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S2080/01—Selection of particular materials
    • F24S2080/012—Concrete
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
    • F24S30/452—Vertical primary axis
    • 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

  • the present invention is encompassed within the field of solar energy, and more specifically, the present invention relates to a T-shaped solar tracker, with movement of the supporting structure of the energy collecting surface with respect to the fixed pedestal, with reinforced and prestressed or post-tensioned concrete pedestal.
  • a T-shaped solar tracker basically consists of the following elements: collector surface (reflective panels or photovoltaic panels), support structure, drive mechanism, pedestal, foundation and control system.
  • the pedestal is responsible for supporting the solar tracker cup (collector surface, support structure and drive mechanism) in position and for transmitting all the loads induced by the follower cup (own weight, aerodynamic loads, etc.) to the ground , through the foundation.
  • the most widespread solution currently on the market is based on the use of a metal pedestal formed by a cylindrical tube of reduced thickness and flanges at its ends, which joins a reinforced concrete foundation, manufactured on site, through bolts of anchor embedded in the foundation.
  • the most common foundation is of the pile type (although it can also be of the shoe type), for whose construction a pilot machine is used, with which a circular perforation is carried out to the defined depth, in which the pile reinforcement is introduced and the anchor bolts properly positioned by template, and finally the whole assembly is concreted.
  • the present invention relates to a solar tracker with reinforced concrete pedestal comprising a pickup surface, a support structure, a drive mechanism and a reinforced concrete pedestal responsible for supporting the cup of the Solar Tracker.
  • the pedestal comprises tensioned steel cables for concrete compression and is partially embedded in the ground, acting as a foundation.
  • Tensioned steel cables preferably run the entire length of the pedestal and are tensioned at a certain level of load so that the concrete never works under tension even if the solar tracker suffers the maximum loads defined for the application.
  • the tensioned steel cables are post-tensioned cables. In another preferred embodiment, the tensioned steel cables are prestressing cables.
  • the pedestal preferably comprises a column and an interface in its upper part for the connection with the solar tracker cup.
  • the pedestal can comprise a truncated conical section that adapts the column section with the interface section.
  • the pedestal can have longitudinal grooves, located in the part of the pedestal partially embedded in the ground, to help transmit torsional loads.
  • the pedestal can also have a plurality of lateral fins embedded in the ground at its bottom.
  • the pedestal is preferably partially embedded in a hole drilled in the ground and filled with concrete.
  • the pedestal is preferably made in one piece. In a preferred embodiment the pedestal is prefabricated in the workshop.
  • the solar tracker of the present invention comprises a reinforced and prestressed (or post-tensioned) concrete pedestal, which incorporates the functions of the foundation when it is designed so that part of its length is embedded in the ground and transmits the loads to it. .
  • This reinforced and prestressed / post-tensioned concrete pedestal requires less concrete volume than a conventional reinforced concrete pedestal to withstand the loads that the follower suffers, being also the prestressing / post-tensioning adaptable to the maximum loads defined for each application.
  • prestressing / post-tensioning the appearance is avoided of cracks in concrete, which in the case of conventional reinforced concrete would eventually appear over time because the concrete would be subject to variable tensile-compression stresses caused by the fluctuation of the loads suffered by the follower, so that with The present invention is achieved to guarantee the strength and stiffness of the pedestal throughout the life of the plant.
  • the pedestal can be prefabricated in the workshop, which facilitates its quality control and allows high reliability and repeatability.
  • the pedestal comprises a solid or hollow, prismatic or cylindrical column of reinforced and prestressed (or post-tensioned) concrete.
  • prestressed pedestal there are steel cables that are held tensioned with a certain load in the pedestal concreting process, during its manufacturing process, this prestressing being variable according to the maximum loads defined for each application. This prestressing will be such that, although the follower suffers the maximum loads defined for an application, the concrete is never subjected to tensile stresses.
  • post-tensioned pedestal the cables are subsequently tensioned to the concreting and curing of the pedestal.
  • the upper end of the pedestal has an interface for joining with the follower cup, an interface that can be varied to adapt it to the characteristics of the follower cup interface.
  • This pedestal interface can consist of threaded inserts or anchor bolts embedded in the pedestal, or through holes.
  • the pedestal can incorporate some fins located in the remaining section embedded in the ground, to help transmit torsion loads to the ground and increase rigidity.
  • a perforation of greater section than the pedestal is carried out in the field, be it cylindrical or prismatic, and, in case of carrying fins, the necessary excavation is also done for them.
  • the pedestal is inserted into the perforation and, once it has been correctly positioned with the help of temporary supports, concrete is poured to fill the space between the perforation and the pedestal, so that the pedestal and ground work together.
  • the verticality error of the pedestal produced during its installation or over time by ground settlement is compensated with the control software of the solar tracker drive mechanism, thus preventing the verticality error from affecting the tracking accuracy of the tracker and therefore an extremely precise positioning of the pedestal is not necessary.
  • Figures 1A and 1 B show different views of a solar tracker incorporating a possible embodiment of the pedestal according to the present invention.
  • Figures 2A, 2B and 2C show a possible embodiment of the pedestal.
  • Figure 3 shows a cross section of the pedestal column, where the detail of grooves in the part of the column that is embedded in the ground is observed.
  • Figures 4A, 4B and 4C show another possible embodiment of the pedestal.
  • Figure 5 shows schematically the assembly of the pedestal embedded in the ground.
  • FIGS 1 A and 1 B show, respectively, a rear and profile view of a solar tracker 1 incorporating an embodiment of the pedestal 10 according to the present invention.
  • the pedestal 10 is responsible for supporting the collector surface 2 (whether reflective panels or photovoltaic panels), the support structure 3 and the drive mechanism 4 of the solar tracker.
  • Figure 2A, 2B and 2C one of the possible embodiments of the pedestal 10 is shown.
  • Figure 2A shows a perspective of the external appearance.
  • Figure 2B represents a longitudinal section of the pedestal 10 of Figure 2A installed in a perforation 20 carried out on the ground 21, in which the reinforcement 1 1 and the tensioned steel cables 12 are not shown.
  • Figure 2C shows a longitudinal section of the pedestal where the steel reinforcement 1 1 and the tensioned steel cables 12 are seen that run the entire length of the pedestal 10.
  • the pedestal 10 of this embodiment comprises a column 15 of reinforced and prestressed / post-tensioned concrete , of constant section, cylindrical, slender and hollow, with a height of several meters.
  • the pedestal 10 has in its upper part an interface 17 for the connection with the follower cup.
  • the geometry has to change progressively at the top of the pedestal 10, without abrupt changes in the size of the section to avoid stress concentration.
  • the pedestal 10 in order to adapt these sections, the pedestal 10 comprises a truncated conical section 16 with a low inclination angle, which adapts the diameter of the column 15 with the diameter of the interface 17.
  • a series of threaded inserts 18 are embedded in the pedestal for the attachment elements of the follower cup 1.
  • the pedestal 10 In its lower part the pedestal 10 has longitudinal grooves 19 in the part of the column 15 of the pedestal 10 which is embedded in the ground 21. Grooves Longitudinal 19, shown in detail in the cross section of column 15 ( Figure 3), are useful for better transmitting torsion.
  • Figures 4A, 4B and 4C show another possible embodiment of the pedestal 10, which incorporates fins 13 (two fins, in the embodiment shown in the figure) in its lower part to transmit torsional loads to the ground. Inside (both column 15 and fins 13) the concrete has steel reinforcement 1 1.
  • Column 15 is longitudinally traversed by several tensioned steel cables 12, either for post-tensioning or prestressing cables.
  • the concrete pedestal 10 is manufactured in a workshop that does not have to be close to the location of the follower.
  • a mold is used for its manufacture in which the steel reinforcement 1 1 and the steel cables 12 are placed.
  • the steel cables are tensioned to the predefined load and the concrete is poured into the mold, letting it cure for the necessary time. Once the sufficient degree of cure is reached, it is removed from the mold.
  • the procedure for using the prestressed reinforced concrete pedestal for solar tracker comprises the following steps:
  • Figure 5 shows schematically the assembly of the pedestal 10 embedded in the ground 21. Once the pedestal 10 has been correctly positioned with the help of temporary supports 23, concrete 22 is poured to fill the space between the perforation 20 and the pedestal 10, so that pedestal 10 and ground 21 work together.

Landscapes

  • Engineering & Computer Science (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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Foundations (AREA)

Abstract

La présente invention concerne un piédestal (10) conçu pour soutenir la tête d'un suiveur solaire (1), comprenant des câbles en acier tendus (12), soit de précontrainte, soit de post-contrainte, noyés dans le béton sur toute leur longueur. Le piédestal (10) est partiellement intégré dans le terrain (21), servant ainsi de fondation. Le piédestal peut comporter, dans sa partie intégrée dans le terrain (21), des stries longitudinales (19) ou des ailettes latérales (13) permettant de transmettre au terrain les charges de torsion. Le piédestal est fabriqué en une seule pièce, peut être massif ou creux et présente une forme cylindrique ou prismatique.
PCT/ES2015/070571 2014-08-29 2015-07-24 Suiveur solaire à piédestal en béton armé WO2016030558A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
MA38953A MA38953B1 (fr) 2014-08-29 2015-07-24 Suiveur solaire à piédestal en béton armé
CN201580046793.3A CN106796053A (zh) 2014-08-29 2015-07-24 具有钢筋混凝土基部的太阳能跟踪器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES201431263 2014-08-29
ESP201431263 2014-08-29

Publications (1)

Publication Number Publication Date
WO2016030558A1 true WO2016030558A1 (fr) 2016-03-03

Family

ID=54072875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2015/070571 WO2016030558A1 (fr) 2014-08-29 2015-07-24 Suiveur solaire à piédestal en béton armé

Country Status (4)

Country Link
CN (1) CN106796053A (fr)
CL (1) CL2016000690U1 (fr)
MA (1) MA38953B1 (fr)
WO (1) WO2016030558A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR558718A (fr) * 1922-11-15 1923-09-01 Base de poteau en béton ou ciment armé
FR652922A (fr) * 1927-04-16 1929-03-14 Système de fondations particulièrement applicable aux mâts ou pylônes en treillis
US4491388A (en) * 1982-05-28 1985-01-01 Wood Douglas E Support carriage for a solar concentrator
WO2008046937A1 (fr) 2006-10-20 2008-04-24 Apia Xxi, S.A. Suiveur solaire et procédé de pré-assemblage, de transport et d'assemblage final d'un tel suiveur solaire
DE102008027313A1 (de) 2008-06-07 2009-12-10 Rev Renewable Energy Ventures, Inc. Solaranlage
US20110072740A1 (en) * 2009-09-29 2011-03-31 Dieter David B Concrete photovoltaic system
US20110094088A1 (en) * 2009-10-23 2011-04-28 Chevron U.S.A. Inc. Solar canopy construction method
EP2381484A1 (fr) * 2010-04-22 2011-10-26 Valente S.p.A. Structure améliorée pour le support terrestre de modules photovoltaïques et installation photovoltaïque dotée d'une telle structure
JP2014077319A (ja) * 2012-10-12 2014-05-01 Goodfellows Inc 太陽光パネル架台および太陽光パネル架台の施工方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201656840U (zh) * 2010-03-31 2010-11-24 中环光伏系统有限公司 一种用于太阳能跟踪系统的支撑结构
EP2585771A4 (fr) * 2010-06-24 2015-04-15 Magna Int Inc Ensemble support solaire modulaire
CN102312428A (zh) * 2011-04-26 2012-01-11 王庆伟 齿桩及其成桩工法
CN202995470U (zh) * 2012-06-21 2013-06-12 光之源工业(以色列)有限公司 用于中央塔式发电站的定日镜的塔架及定日镜

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR558718A (fr) * 1922-11-15 1923-09-01 Base de poteau en béton ou ciment armé
FR652922A (fr) * 1927-04-16 1929-03-14 Système de fondations particulièrement applicable aux mâts ou pylônes en treillis
US4491388A (en) * 1982-05-28 1985-01-01 Wood Douglas E Support carriage for a solar concentrator
WO2008046937A1 (fr) 2006-10-20 2008-04-24 Apia Xxi, S.A. Suiveur solaire et procédé de pré-assemblage, de transport et d'assemblage final d'un tel suiveur solaire
DE102008027313A1 (de) 2008-06-07 2009-12-10 Rev Renewable Energy Ventures, Inc. Solaranlage
US20110072740A1 (en) * 2009-09-29 2011-03-31 Dieter David B Concrete photovoltaic system
US20110094088A1 (en) * 2009-10-23 2011-04-28 Chevron U.S.A. Inc. Solar canopy construction method
EP2381484A1 (fr) * 2010-04-22 2011-10-26 Valente S.p.A. Structure améliorée pour le support terrestre de modules photovoltaïques et installation photovoltaïque dotée d'une telle structure
JP2014077319A (ja) * 2012-10-12 2014-05-01 Goodfellows Inc 太陽光パネル架台および太陽光パネル架台の施工方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section PQ Week 201432, 1 May 2014 Derwent World Patents Index; Class Q46, AN 2014-H80780, XP002750743 *

Also Published As

Publication number Publication date
MA38953A1 (fr) 2016-10-31
CN106796053A (zh) 2017-05-31
MA38953B1 (fr) 2017-06-30
CL2016000690U1 (es) 2016-07-29

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