WO2010055397A2 - Solar concentrator - Google Patents

Solar concentrator Download PDF

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Publication number
WO2010055397A2
WO2010055397A2 PCT/IB2009/007432 IB2009007432W WO2010055397A2 WO 2010055397 A2 WO2010055397 A2 WO 2010055397A2 IB 2009007432 W IB2009007432 W IB 2009007432W WO 2010055397 A2 WO2010055397 A2 WO 2010055397A2
Authority
WO
WIPO (PCT)
Prior art keywords
ribs
solar concentrator
torsion tube
mirror
composite
Prior art date
Application number
PCT/IB2009/007432
Other languages
French (fr)
Other versions
WO2010055397A3 (en
Inventor
Giovanni Ronda
Original Assignee
Ronda High Tech Srl
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 Ronda High Tech Srl filed Critical Ronda High Tech Srl
Priority to EP09771772A priority Critical patent/EP2356381A2/en
Publication of WO2010055397A2 publication Critical patent/WO2010055397A2/en
Publication of WO2010055397A3 publication Critical patent/WO2010055397A3/en

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
    • F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
    • 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
    • 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
    • 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
    • F24S30/42—Arrangements for moving or orienting solar heat collector modules for rotary movement with only one rotation axis
    • F24S30/425—Horizontal 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 relates to a solar concentrator.
  • Background art Solar concentrators are currently known which have a structure composed of a frame that supports an orientable lattice-like steel structure, which is adapted to support the concentrator mirror and is motorized in order to allow its orientation.
  • Another currently known structure for concentrators has a motorized torsion tube to which preformed steel ribs are connected which are sometimes mutually connected by transverse stringers.
  • Such ribs are notoriously heavy and therefore onerous to transport and assemble.
  • the aim of the present invention is to provide a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror, that can be installed more easily and in shorter times than currently known structures.
  • an object of the invention is to propose a concentrator that is lighter than currently known structures.
  • Another object of the invention is to propose a solar concentrator that is simple and easy to use and can be manufactured and installed with relatively low costs.
  • a solar concentrator particularly of the type with a composite cylindrical-parabolic mirror, which comprises supporting towers that support a torsion tube that can be rotated axially by means of motors, characterized in that it comprises ribs which are fixed transversely to said tube, said composite mirror being composed of reflective panels which comprise a mirror-finished plate that is supported by a base for supporting and fixing to said ribs, said base and said ribs being made of composite materials and having substantially the same thermal expansion coefficient.
  • Figure l is a view of a solar concentrator according to the invention.
  • Figure 2 is a rear view of a mirror-finished panel of the solar concentrator according to the invention
  • Figure 3 is a partially sectional enlarged-scale view of a detail of the solar concentrator according to the invention
  • Figure 4 is an exploded perspective view of a rib of the solar concentrator according to the invention.
  • Figures 5 and 6 are perspective views of a detail, respectively in the exploded and assembled condition, of the solar concentrator according to the invention.
  • the reference numeral 10 generally designates a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror 11, which comprises supporting towers 12 which support a torsion tube 13, which can be rotated axially by means of motors.
  • a solar concentrator 10 according to the invention has a particularity in that it comprises ribs 14, which are fixed transversely to the torsion tube 13, the composite mirror 11 being composed of reflective panels 15, which comprise a thin mirror-finished plate 16 which is supported by a base 17 for support and fixing to the ribs 14, the base 17 and the ribs 14 being made of composite materials so as to have substantially the same thermal expansion coefficient.
  • the base 17 and the ribs 14 are made of a material known commercially as SMC, from the acronym of the English expression "sheet molding compound", i.e., a thermosetting composite material obtained by hot pressing of a stratified arrangement of sheets of polyester resin reinforced with glass fibers with the addition of mineral fillers and catalyst.
  • sheet molding compound i.e., a thermosetting composite material obtained by hot pressing of a stratified arrangement of sheets of polyester resin reinforced with glass fibers with the addition of mineral fillers and catalyst.
  • the ribs 14 are conveniently composed of two complementary half- ribs 18, which have corresponding seats 19 shaped so as to surround, in cooperation, the torsion tube 13.
  • the ribs 14 are further provided with brackets 20 for their mutual fixing, for example by bolting.
  • the ribs 14 are preferably provided, at the seats 19, with means for locking to the torsion tube 13, such as for example pins 21, which are adapted to enter corresponding holes 22 provided in the torsion tube 13.
  • the reflective panels 15 are conveniently connected in a bridge-like arrangement between two successive ribs 14a and 14b of the ribs 14, cooperating with them so as to give strength to the concentrator 10 that they compose.
  • the bases 17 bolted to the ribs 14 in fact allow to provide a rigid connection between the ribs and the bases, cooperating to provide a concentrator 10 which is mainly made of SMC, except for the components of the bolted connections.
  • the concentrator 10 according to the invention has a lower weight than an equivalent structure of the currently known type, while ensuring that it has considerable structural stiffness and strength.
  • reaction brackets 23 are conveniently welded, in diametrically opposite positions, to the torsion tube
  • the half-ribs 18 conveniently have a cross-section provided with concavities and convexities that are adapted to give them stiffness without increasing their weight.
  • the invention achieves the intended aim and objects, providing a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror, which can be installed more easily and in shorter times than currently known structures.
  • the ribs and the panels mainly made of SMC, are in fact lighter than currently known steel ribs and are therefore easier to handle rapidly and with a reduced use of labor, further to the advantage of installation costs.
  • the ribs are oriented on the torsion tube by coupling the pins thereon, without requiring any further adjustment, to the full advantage of simplicity and speed in assembly.
  • a solar concentrator according to the invention is further easier and simpler to use than currently known structures and further can be produced with relatively low costs.

Abstract

A solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror (11), comprising - supporting towers (12) that support a torsion tube (13) that can be rotated axially by means of motors, - ribs (14) which are fixed transversely to the torsion tube (13), the composite mirror (11) being composed of reflective panels (15) which comprise a mirror-finished plate (16) that is supported by a base (17) for supporting and fixing to the ribs (14), the base (17) and the ribs (14) being made of composite materials and having substantially the same thermal expansion coefficient.

Description

SOLAR CONCENTRATOR Technical field
The present invention relates to a solar concentrator. Background art Solar concentrators are currently known which have a structure composed of a frame that supports an orientable lattice-like steel structure, which is adapted to support the concentrator mirror and is motorized in order to allow its orientation.
These structures are complex and notoriously require long assembly times.
Another currently known structure for concentrators has a motorized torsion tube to which preformed steel ribs are connected which are sometimes mutually connected by transverse stringers.
Such ribs are notoriously heavy and therefore onerous to transport and assemble.
Moreover, they are bolted to the torsion tube at eyes provided thereon so as to allow adjustment of their position.
This adjustment requires extreme care as well as long labor times, to the full disadvantage of rapid completion of the structure. Moreover, in the field of currently known solar concentrators the problem of handling the heavy mirror- finished glass plates that compose the mirror is particularly felt.
It is also known that due to the differential thermal expansion between the mirrors and the steel structures to which they are fixed, the mirrors can crack or break. Disclosure of the invention
The aim of the present invention is to provide a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror, that can be installed more easily and in shorter times than currently known structures. Within this aim, an object of the invention is to propose a concentrator that is lighter than currently known structures.
Another object of the invention is to propose a solar concentrator that is simple and easy to use and can be manufactured and installed with relatively low costs.
This aim, as well as these and other objects that will become better apparent hereinafter, are achieved by a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror, which comprises supporting towers that support a torsion tube that can be rotated axially by means of motors, characterized in that it comprises ribs which are fixed transversely to said tube, said composite mirror being composed of reflective panels which comprise a mirror-finished plate that is supported by a base for supporting and fixing to said ribs, said base and said ribs being made of composite materials and having substantially the same thermal expansion coefficient.
Brief description of the drawings
Further characteristics and advantages of the invention will become better apparent from the following detailed description of a preferred but not exclusive embodiment of the solar concentrator according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
Figure l is a view of a solar concentrator according to the invention;
Figure 2 is a rear view of a mirror-finished panel of the solar concentrator according to the invention; Figure 3 is a partially sectional enlarged-scale view of a detail of the solar concentrator according to the invention;
Figure 4 is an exploded perspective view of a rib of the solar concentrator according to the invention;
Figures 5 and 6 are perspective views of a detail, respectively in the exploded and assembled condition, of the solar concentrator according to the invention.
Ways of carrying out the invention
It is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.
With reference to the figures, the reference numeral 10 generally designates a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror 11, which comprises supporting towers 12 which support a torsion tube 13, which can be rotated axially by means of motors.
A solar concentrator 10 according to the invention has a particularity in that it comprises ribs 14, which are fixed transversely to the torsion tube 13, the composite mirror 11 being composed of reflective panels 15, which comprise a thin mirror-finished plate 16 which is supported by a base 17 for support and fixing to the ribs 14, the base 17 and the ribs 14 being made of composite materials so as to have substantially the same thermal expansion coefficient.
Advantageously, the base 17 and the ribs 14 are made of a material known commercially as SMC, from the acronym of the English expression "sheet molding compound", i.e., a thermosetting composite material obtained by hot pressing of a stratified arrangement of sheets of polyester resin reinforced with glass fibers with the addition of mineral fillers and catalyst.
The ribs 14 are conveniently composed of two complementary half- ribs 18, which have corresponding seats 19 shaped so as to surround, in cooperation, the torsion tube 13.
The ribs 14 are further provided with brackets 20 for their mutual fixing, for example by bolting.
Moreover, the ribs 14 are preferably provided, at the seats 19, with means for locking to the torsion tube 13, such as for example pins 21, which are adapted to enter corresponding holes 22 provided in the torsion tube 13. In this manner, when assembling the ribs 14 on the torsion tube 13, they are arranged according to a preset criterion, without requiring long and onerous adjustment maneuvers. The reflective panels 15 are conveniently connected in a bridge-like arrangement between two successive ribs 14a and 14b of the ribs 14, cooperating with them so as to give strength to the concentrator 10 that they compose.
The bases 17 bolted to the ribs 14 in fact allow to provide a rigid connection between the ribs and the bases, cooperating to provide a concentrator 10 which is mainly made of SMC, except for the components of the bolted connections.
In this manner, the concentrator 10 according to the invention has a lower weight than an equivalent structure of the currently known type, while ensuring that it has considerable structural stiffness and strength.
With particular reference to Figures 5 and 6, reaction brackets 23 are conveniently welded, in diametrically opposite positions, to the torsion tube
13 and are bolted in an adjustable manner to the complementary half-ribs 18 of facing heads 24 thereof. Moreover, the half-ribs 18 conveniently have a cross-section provided with concavities and convexities that are adapted to give them stiffness without increasing their weight.
In practice it has been found that the invention achieves the intended aim and objects, providing a solar concentrator, particularly of the type with a composite cylindrical-parabolic mirror, which can be installed more easily and in shorter times than currently known structures. The ribs and the panels, mainly made of SMC, are in fact lighter than currently known steel ribs and are therefore easier to handle rapidly and with a reduced use of labor, further to the advantage of installation costs. Moreover, according to the invention the ribs are oriented on the torsion tube by coupling the pins thereon, without requiring any further adjustment, to the full advantage of simplicity and speed in assembly.
A solar concentrator according to the invention is further easier and simpler to use than currently known structures and further can be produced with relatively low costs.
The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements. In practice, the materials employed, so long as they are compatible with the specific use, as well as the contingent shapes and dimensions, may be any according to requirements and to the state of the art.
The disclosures in Italian Patent Application No. PD2008A000327, from which this application claims priority, are incorporated herein by reference.
Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.

Claims

1. A solar concentrator (10), particularly of the type with a composite cylindrical-parabolic mirror (11), comprising supporting towers (12) that support a torsion tube (13) that can be rotated axially by means of motors, characterized in that it comprises ribs (14) which are fixed transversely to said torsion tube (13), said composite mirror (11) being composed of reflective panels (15) which comprise a mirror-finished plate (16) that is supported by a base (17) for supporting and fixing to said ribs (14), said base (17) and said ribs (14) being made of the same composite material and having substantially the same thermal expansion coefficient.
2. The solar concentrator according to claim 1, characterized in that said base (17) and said ribs (14) are made of composite thermosetting material (SMC), obtained by hot pressing of a stratified arrangement of sheets of polymeric resin reinforced with glass fibers with the addition of mineral fillers and catalyst.
3. The solar concentrator according to claim 1, characterized in that said ribs (14) are composed of two complementary half-ribs (18), which have corresponding seats (19) shaped so as to surround, in cooperation, said torsion tube (13), said ribs being provided with brackets (20) for their mutual fixing.
4. The solar concentrator according to claim 3, characterized in that said ribs (14) are provided, at said seats (19), with means for locking to said torsion tube (13).
5. The solar concentrator according to claim 1, characterized in that said reflective panels (15) are connected in a bridge-like arrangement between two successive ribs (14a, 14b) of said ribs (14), providing a monolithic structure which cooperates toward the stress resistance of the entire structure.
6. The solar concentrator of according to claim 3, characterized in that the cross-section of said half-ribs (18) has concavities and convexities that are adapted to provide said half-ribs with stiffness without increasing their weight.
7. The solar concentrator according to claim 1, characterized in that the fixings of the ribs (14) to the tube (13) allow an assembly in the final position without subsequent alignments.
8. The solar concentrator according to claim 2, characterized in that said polymeric resin is a polyester resin.
PCT/IB2009/007432 2008-11-11 2009-11-11 Solar concentrator WO2010055397A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09771772A EP2356381A2 (en) 2008-11-11 2009-11-11 Solar concentrator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000327A ITPD20080327A1 (en) 2008-11-11 2008-11-11 STRUCTURE OF SOLAR CONCENTRATOR
ITPD2008A000327 2008-11-11

Publications (2)

Publication Number Publication Date
WO2010055397A2 true WO2010055397A2 (en) 2010-05-20
WO2010055397A3 WO2010055397A3 (en) 2010-08-26

Family

ID=41168551

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/007432 WO2010055397A2 (en) 2008-11-11 2009-11-11 Solar concentrator

Country Status (3)

Country Link
EP (1) EP2356381A2 (en)
IT (1) ITPD20080327A1 (en)
WO (1) WO2010055397A2 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011163563A1 (en) * 2010-06-24 2011-12-29 Magna International Inc Modular solar support assembly
WO2012017109A1 (en) 2010-08-05 2012-02-09 Abengoa Solar New Technologies, S.A. Structure with primary-reflector securing beams
ITUD20100160A1 (en) * 2010-08-27 2012-02-28 Agenzia Naz Per Le Nuove Tecnologie SUPPORT STRUCTURE FOR A SOLAR SYSTEM WITH PARABOLIC-LINEAR CONCENTRATION AND PROCEDURE FOR ITS REALIZATION
EP2466225A1 (en) * 2010-12-15 2012-06-20 Hitachi Plant Technologies, Ltd. Solar collector and cooperative solar collector system
DE102011001947A1 (en) * 2011-04-11 2012-10-11 Thyssenkrupp Steel Europe Ag Preparing a curved reflector provided with a support structure for a solar thermal plant, comprises connecting a curved, a convex rear side exhibiting reflector with one support structure by sticking
EP2602570A2 (en) 2011-12-08 2013-06-12 NEE Innovations, s.r.o. Supporting structure for a parabolic trough of a solar collector
EP2604948A1 (en) * 2011-12-13 2013-06-19 Kornmüller, Manfred Trough shaped solar panel
US20130153007A1 (en) * 2011-12-14 2013-06-20 Adam Plesniak Torque tube with outrigger
RU2576752C2 (en) * 2014-05-19 2016-03-10 Федеральное государственное бюджетное научное учреждение "Всероссийский научно-исследовательский институт электрификации сельского хозяйства"(ФГБНУ ВИЭСХ) Solar module with concentrator
US10804837B2 (en) * 2016-03-25 2020-10-13 Sunpower Corporation Sun tracking solar energy collection system and method of assembly

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ITPD20110359A1 (en) * 2011-11-18 2013-05-19 Ronda High Tech Srl STRUCTURE OF LINEAR SOLAR COLLECTOR
CN106524533A (en) * 2016-11-11 2017-03-22 内蒙古旭宸能源有限公司 Low-cost high-precision trough type concentrating heat collector for solar heating

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011163563A1 (en) * 2010-06-24 2011-12-29 Magna International Inc Modular solar support assembly
US9134045B2 (en) 2010-06-24 2015-09-15 Magna International Inc. Modular solar support assembly
CN102959345A (en) * 2010-06-24 2013-03-06 麦格纳国际公司 Modular solar support assembly
ES2375887A1 (en) * 2010-08-05 2012-03-07 Abengoa Solar New Technologies S.A. Structure with primary-reflector securing beams
WO2012017109A1 (en) 2010-08-05 2012-02-09 Abengoa Solar New Technologies, S.A. Structure with primary-reflector securing beams
CN103140722A (en) * 2010-08-05 2013-06-05 阿文戈亚太阳能新技术公司 Structure with primary-reflector securing beams
WO2012025849A3 (en) * 2010-08-27 2012-11-15 Agenzia Nazionale Per Le Nuove Tecnologie, L'energia E Lo Sviluppo Economico Sostenibile (Enea) Support structure for a parabolic- linear solar plant of the concentration type and method for its manufacture
ITUD20100160A1 (en) * 2010-08-27 2012-02-28 Agenzia Naz Per Le Nuove Tecnologie SUPPORT STRUCTURE FOR A SOLAR SYSTEM WITH PARABOLIC-LINEAR CONCENTRATION AND PROCEDURE FOR ITS REALIZATION
WO2012025849A2 (en) 2010-08-27 2012-03-01 Agenzia Nazionale Per Le Nuove Tecnologie, L'energia E Lo Sviluppo Economico Sostenibile (Enea) Support structure for a parabolic-linear solar plant of the concentration type and method for its manufacture
EP2466225A1 (en) * 2010-12-15 2012-06-20 Hitachi Plant Technologies, Ltd. Solar collector and cooperative solar collector system
DE102011001947A1 (en) * 2011-04-11 2012-10-11 Thyssenkrupp Steel Europe Ag Preparing a curved reflector provided with a support structure for a solar thermal plant, comprises connecting a curved, a convex rear side exhibiting reflector with one support structure by sticking
EP2602570A2 (en) 2011-12-08 2013-06-12 NEE Innovations, s.r.o. Supporting structure for a parabolic trough of a solar collector
WO2013084016A1 (en) * 2011-12-08 2013-06-13 Nee Innovations, S.R.O. Supporting structure for a parabolic trough of solar collectors
EP2604948A1 (en) * 2011-12-13 2013-06-19 Kornmüller, Manfred Trough shaped solar panel
WO2013087477A1 (en) * 2011-12-13 2013-06-20 Kornmueller Manfred Trough-shaped solar collector
US20130153007A1 (en) * 2011-12-14 2013-06-20 Adam Plesniak Torque tube with outrigger
RU2576752C2 (en) * 2014-05-19 2016-03-10 Федеральное государственное бюджетное научное учреждение "Всероссийский научно-исследовательский институт электрификации сельского хозяйства"(ФГБНУ ВИЭСХ) Solar module with concentrator
US10804837B2 (en) * 2016-03-25 2020-10-13 Sunpower Corporation Sun tracking solar energy collection system and method of assembly

Also Published As

Publication number Publication date
ITPD20080327A1 (en) 2010-05-12
WO2010055397A3 (en) 2010-08-26
EP2356381A2 (en) 2011-08-17

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