WO2002012799A2 - Device for utilizing concentrated solar energy - Google Patents

Device for utilizing concentrated solar energy Download PDF

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Publication number
WO2002012799A2
WO2002012799A2 PCT/BE2001/000129 BE0100129W WO0212799A2 WO 2002012799 A2 WO2002012799 A2 WO 2002012799A2 BE 0100129 W BE0100129 W BE 0100129W WO 0212799 A2 WO0212799 A2 WO 0212799A2
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WO
WIPO (PCT)
Prior art keywords
absorber
concentrator
situated
primary
angle
Prior art date
Application number
PCT/BE2001/000129
Other languages
French (fr)
Other versions
WO2002012799A3 (en
Original Assignee
Ven, Juha
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 Ven, Juha filed Critical Ven, Juha
Priority to AU2001283716A priority Critical patent/AU2001283716A1/en
Publication of WO2002012799A2 publication Critical patent/WO2002012799A2/en
Publication of WO2002012799A3 publication Critical patent/WO2002012799A3/en

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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
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • 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
    • 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
    • F24S23/80—Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
    • 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
    • F24S2023/87—Reflectors layout
    • F24S2023/872—Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors
    • 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

Definitions

  • This invention relates to a device for utilizing concentrated solar energy, which device comprises a linear primary concentrator which consists of one or more mirrors and collects the solar radiation and reflects it towards an oblong absorber, arranged parallel to the primary concentrator, and a secondary concentrator arranged above this absorber.
  • a lineary concentrator is a concentrator which extends in one direction in a straight manner, usually horizontal. Perpendicular to this direction, it has a suitable form in order to collect the solar radiation and to reflect it in a concentrated manner in the direction of the absorber and the secondary concentrator.
  • this spot is enlarged by faults of the optical instruments, i.e. the mirrors of the primary and secondary concentrators.
  • the line in the center of a set of parallel rays reflected at the primary concentrator is the reflection of the center of the sun's disk in a perfect optical system.
  • CPC Computer Parabolic Collector
  • This technology makes it possible to double the concentration of the solar radiation and, thus, to halve the cross-section of the absorber and the heat losses at a certain temperature.
  • optical losses in the secondary concentrator are larger than the economization in heat losses, such that this technology is not very widely applied.
  • the secondary concentrator also is constructed such that for a well-defined angle of the rays towards an outermost point of the absorber, which sometimes is tangential, these rays are reflected onto said absorber. For other angles, there may be several reflections of the radiation inside the secondary concentrator, which also means a diminished efficiency.
  • the invention aims at a device for utilizing concentrated solar energy which avoids said disadvantages and has minimum losses of solar energy.
  • this aim is realized in that the primary concentrator is directed towards the absorber in such a manner that three focal lines are formed which are directed parallel in respect to the absorber.
  • the three focal lines are situated within the space limited by the secondary concentrator.
  • the central focal line can be situated in the vertical plane through the center of the absorber.
  • This central focal line then preferably is situated within the absorber.
  • the secondary concentrator is a CPC concentrator.
  • the absorber may be a round tube.
  • figure l schematically represents a front view of a device according to the invention
  • figure 2 at a larger scale, represents the portion indicated by F2 in figure 1
  • figures 3 and 4 represent, cross-sectional views of the secondary concentrator and the absorber of the device according to the preceding figures, on which several outermost rays are shown.
  • the device for utilizing solar energy substantially consists of a primary concentrator 1 extending horizontally in east-west direction, an absorber 2 arranged thereabove which also extends horizontally in east-west, direction, and a secondary concentrator 3 extending parallel to the primary concentrator 1 as a cap above the absorber 2.
  • the primary concentrator l may have a parabolic cross- section or, as in the represented example, be divided into segments and consist of a number of flat mirror strips 4 having, for example, a width of 0,5 m.
  • Each of the mirror strips 4 is fixed in its center on an rotational shaft formed by a tube 5, which shaft is beared on a frame 6.
  • the tubes 5 can be rotated together or separately by means of means which are not represented in figure 1, in such a manner that they follow the sun 7.
  • the absorber 2 in its most simple form of embodiment, is a round metal tube in which the fluid to be heated is flowing and which is covered at its exterior side with a heat-absorbing covering, for example, a black layer which had been sputtered thereupon.
  • This tube may be surrounded by a tube of heat-resistant glass which is not represented in figure 1.
  • the tube of the absorber 2 by means of a suspension 8, is suspended at a longitudinal beam 9 hanging at gantries 10 which are fixed at said frame 6.
  • a secondary concentrator 3 is provided.
  • the secondary concentrator 3 is constructed according to the CPC technology and comprises a mirror 11 consisting of two quasi-parabolic halves 11A and 11B which form each other's mirror image, and in the middle, at a distance above the absorber 2 , adjoin at each other with a small , downward-directed point 11C, as represented in detail in figures 2 to 4.
  • this mirror 11 is covered with thermically insulating material 12 and, at regular distances, is suspended at said longitudinal beam 9 by means of yokes 13.
  • each of the mirror strips 4 of the primary concentrator 1 reflects a parallel bundle of rays back to the absorber 2.
  • the central line 16 of each of these bundles is represented, and the two outermost rays 17 of the concentrator 1 as a whole unit.
  • the portion of the primary concentrator 1 with such an angle C of the bundles which is smaller than the angle A must form a parabole with the focal line at the right hand side in respect to the absorber 2 in figure 3.
  • this portion of the primary concentrator 1 must form a portion of a parabole, the focal line of which is situated at the left hand side in respect to the absorber 2 in figure 3.
  • both outermost rays 18 and 19 of the bundle touch the absorber 2 tangentially after one reflection on the mirror 11, as represented in figure 4.
  • the primary concentrator 1 For the reflected rays, the angle of which is situated between angles A and B, the primary concentrator 1 must form a parabole with the focal line in the middle, on the vertical plane through the center of the absorber 2.
  • the primary concentrator 1 is directed such that three focal lines 20, 21 and 22 directed parallel in respect to the absorber 2 and to the concentrators 1 and 3 are created, as represented in detail in figure 2.
  • the three focal lines 20, 21 and 22 are situated within the space 23 bordered by the mirror 11.
  • the central focal line 20 is situated on the vertical plane through the center of the absorber 2 and of the mirror 11 and even inside the absorber 2.
  • the other two focal lines 21 and 22 are situated at opposite sides of the focal line 20, at the same height in respect to each other, but somewhat lower than the focal line 20.
  • the primary concentrator 1 does not necessarily have to consist of flat mirror strips 4. These strips can be somewhat bent in their perpendicular direction, or the concentrator 1 may consist of a single bent piece.
  • the secondary concentrator 3 does not necessarily have to possess the form represented in the figures and have a mirror 11 with two quasi-parabolical portions 11A and 11B. It may, for example, have a mirror consisting of three segments, for example, three quasi-parabolical portions, with three focuses.
  • the absorber 2 may take other forms than that of a round tube.
  • it may be a plate.

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  • 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)
  • Optical Elements Other Than Lenses (AREA)
  • Lenses (AREA)

Abstract

The invention relates to a device for utilizing concentrated solar energy, which device comprises a lineary primary concentrator (1) which consists of one or more mirrors and collects the solar radiation and reflects it towards an oblong absorber (2), arranged parallel to the primary concentrator, and a secondary concentrator (3) arranged above this absorber. The primary concentrator (1) is directed towards the absorber (2) in such a manner that three focal lines (20, 21, 22) directed parallel in respect to the absorber (2) are formed.

Description

Device for utilizing concentrated solar energy.
This invention relates to a device for utilizing concentrated solar energy, which device comprises a linear primary concentrator which consists of one or more mirrors and collects the solar radiation and reflects it towards an oblong absorber, arranged parallel to the primary concentrator, and a secondary concentrator arranged above this absorber.
A lineary concentrator is a concentrator which extends in one direction in a straight manner, usually horizontal. Perpendicular to this direction, it has a suitable form in order to collect the solar radiation and to reflect it in a concentrated manner in the direction of the absorber and the secondary concentrator.
As the sun is a sphere, solar radiation is a non-parallel radiation, which forms a problem for the application thereof. This non-parallel radiation actually leads to forming an image of the sun in the focal line of the primary concentrator. In fact, there is no real focal line, but a strip forming a collection of focal lines.
Besides, this spot is enlarged by faults of the optical instruments, i.e. the mirrors of the primary and secondary concentrators.
The line in the center of a set of parallel rays reflected at the primary concentrator is the reflection of the center of the sun's disk in a perfect optical system.
The outermost lines of this bundle of parallel rays describe the reflections of, for linear systems, the two edges of the sun's disk which one wants to concentrate, including the maximum of allowed optical faults.
It is clear that, in order to keep heat losses as low as possible, the exterior surface of the absorber must be limited.
In order to achieve this, use is already made of the so- called CPC (Compound Parabolic Collector) technology for the secondary concentrator.
This technology makes it possible to double the concentration of the solar radiation and, thus, to halve the cross-section of the absorber and the heat losses at a certain temperature.
In most cases, however, the optical losses in the secondary concentrator are larger than the economization in heat losses, such that this technology is not very widely applied.
With the CPC technology, tangent .lines of a bundle of rays are directed tangentially towards the absorber. The figure created thereby bundles all rays, within the opening of the secondary concentrator and within the acceptance angle, towards the absorber.
Mostly, there is a physical contact between the absorber and the secondary concentrator, however, due to the temperature limit of the secondary concentrator, this is not always possible.
In such cases, an opening is left between the absorber and the concentrator situated thereabove. If there is no concentration loss, however, a loss occurs due to the opening. Rays directed through this opening are not utilized in a useful manner.
The secondary concentrator also is constructed such that for a well-defined angle of the rays towards an outermost point of the absorber, which sometimes is tangential, these rays are reflected onto said absorber. For other angles, there may be several reflections of the radiation inside the secondary concentrator, which also means a diminished efficiency.
The invention aims at a device for utilizing concentrated solar energy which avoids said disadvantages and has minimum losses of solar energy.
According to the invention, this aim is realized in that the primary concentrator is directed towards the absorber in such a manner that three focal lines are formed which are directed parallel in respect to the absorber.
Preferably, the three focal lines are situated within the space limited by the secondary concentrator.
The central focal line can be situated in the vertical plane through the center of the absorber.
This central focal line then preferably is situated within the absorber.
For efficiency's sake, the secondary concentrator is a CPC concentrator.
The absorber may be a round tube.
With the intention of better showing the characteristics of the invention, hereafter, as an example without any limitative character, a preferred form of embodiment of a device for utilizing concentrated solar energy according to the invention is described, with reference to the accompanying drawings, wherein:
figure l schematically represents a front view of a device according to the invention; figure 2, at a larger scale, represents the portion indicated by F2 in figure 1; figures 3 and 4 represent, cross-sectional views of the secondary concentrator and the absorber of the device according to the preceding figures, on which several outermost rays are shown.
The device for utilizing solar energy according to the invention, represented in figure 1, substantially consists of a primary concentrator 1 extending horizontally in east-west direction, an absorber 2 arranged thereabove which also extends horizontally in east-west, direction, and a secondary concentrator 3 extending parallel to the primary concentrator 1 as a cap above the absorber 2.
The primary concentrator l may have a parabolic cross- section or, as in the represented example, be divided into segments and consist of a number of flat mirror strips 4 having, for example, a width of 0,5 m.
Each of the mirror strips 4 is fixed in its center on an rotational shaft formed by a tube 5, which shaft is beared on a frame 6.
The tubes 5 can be rotated together or separately by means of means which are not represented in figure 1, in such a manner that they follow the sun 7. When the mirror strips 4 are directed into the east-west direction, for the major part of the day the rotation of this mirror strips 4 is in function of the season. The absorber 2, in its most simple form of embodiment, is a round metal tube in which the fluid to be heated is flowing and which is covered at its exterior side with a heat-absorbing covering, for example, a black layer which had been sputtered thereupon.
This tube may be surrounded by a tube of heat-resistant glass which is not represented in figure 1.
At regular distances, the tube of the absorber 2, by means of a suspension 8, is suspended at a longitudinal beam 9 hanging at gantries 10 which are fixed at said frame 6.
Between two successive suspensions 8, a secondary concentrator 3 is provided.
The secondary concentrator 3 is constructed according to the CPC technology and comprises a mirror 11 consisting of two quasi-parabolic halves 11A and 11B which form each other's mirror image, and in the middle, at a distance above the absorber 2 , adjoin at each other with a small , downward-directed point 11C, as represented in detail in figures 2 to 4.
At the upper side, this mirror 11 is covered with thermically insulating material 12 and, at regular distances, is suspended at said longitudinal beam 9 by means of yokes 13.
As represented in figure 3, a line 14 passing through the point 11C of the mirror 11 and being tangential to the absorber 2 at one side, to wit at the left side in figure 3, forms an angle A with the horizontal. A line 15 passing through point lie, however, being tangential at the opposite side at the absorber 2, forms an angle B with the horizontal.
Principally, each of the mirror strips 4 of the primary concentrator 1 reflects a parallel bundle of rays back to the absorber 2. For simplicity's sake, in figure 1 exclusively the central line 16 of each of these bundles is represented, and the two outermost rays 17 of the concentrator 1 as a whole unit.
If the angle of inclination of a bundle of parallel rays and, thus, the angle of inclination C of a central line 16 is smaller than the angle A, then the highest-situated ray 18 tangentially touches the upper side of the absorber 2, whereas the lowest-situated outermost ray 19 of the bundle, after one reflection on the mirror 11, tangentially touches the upper side of the absorber 2, as represented in figure 3.
The same is valid when the angle of inclination C of the bundle is larger than the angle B.
The portion of the primary concentrator 1 with such an angle C of the bundles which is smaller than the angle A must form a parabole with the focal line at the right hand side in respect to the absorber 2 in figure 3.
If angle C is larger than angle B, then this portion of the primary concentrator 1 must form a portion of a parabole, the focal line of which is situated at the left hand side in respect to the absorber 2 in figure 3.
When the angle of inclination D of the bundle is situated between the angles A and B., both outermost rays 18 and 19 of the bundle touch the absorber 2 tangentially after one reflection on the mirror 11, as represented in figure 4. For the reflected rays, the angle of which is situated between angles A and B, the primary concentrator 1 must form a parabole with the focal line in the middle, on the vertical plane through the center of the absorber 2.
In practice, this means that the primary concentrator 1 is directed such that three focal lines 20, 21 and 22 directed parallel in respect to the absorber 2 and to the concentrators 1 and 3 are created, as represented in detail in figure 2.
The three focal lines 20, 21 and 22 are situated within the space 23 bordered by the mirror 11. The central focal line 20 is situated on the vertical plane through the center of the absorber 2 and of the mirror 11 and even inside the absorber 2.
The other two focal lines 21 and 22 are situated at opposite sides of the focal line 20, at the same height in respect to each other, but somewhat lower than the focal line 20.
The primary concentrator 1 does not necessarily have to consist of flat mirror strips 4. These strips can be somewhat bent in their perpendicular direction, or the concentrator 1 may consist of a single bent piece.
Also the secondary concentrator 3 does not necessarily have to possess the form represented in the figures and have a mirror 11 with two quasi-parabolical portions 11A and 11B. It may, for example, have a mirror consisting of three segments, for example, three quasi-parabolical portions, with three focuses.
Also, it must not necessarily be of the CPC type. The absorber 2 may take other forms than that of a round tube. For example, it may be a plate.
The invention is in no way limited to the form of embodiment described heretofore and represented in the figures, on the contrary may such device for utilizing concentrated solar energy be realized in various variants, without leaving the scope of the invention.

Claims

Claims ,
1.- Device for utilizing concentrated solar energy, which device comprises a lineary primary concentrator (1) which consists of one or more mirrors and collects the solar radiation and reflects it towards an oblong absorber ( 2) , arranged parallel to the primary concentrator, and a secondary concentrator (3) arranged above this absorber, characterized in that the primary concentrator (1) is directed towards the absorber (2) in such a manner that three focal lines (20,21,22) directed parallel in respect to the absorber (2) are formed.
2.- Device according to claim 1, characterized in that the three focal lines (20,21,22) are situated within the space limited by the secondary concentrator (3).
3.- Device according to claim 1 or 2, characterized in that the central focal line (20) is situated in the vertical plane through the center of the absorber ( 2) .
4.- Device according to any of the preceding claims, characterized in that the central focal line (21) is situated within the absorber (2).
5.- Device according to any of the preceding claims, characterized in that the secondary concentrator (3) is a CPC concentrator.
6.- Device according to any of the preceding claims, characterized in that the absorber (2) is a round tube.
7.- Device according to any of the preceding claims, characterized in that, if tangent lines at the absorber
(2) from the center of the secondary concentrator (3) form angles A and B, respectively, with the horizontal, the portion of the primary concentrator (1) of which the reflected rays form an angle with the horizontal which is situated in between the angles A and B, has a focus which is situated on the vertical plane through the absorber (2).
8.- Device according to any of the preceding claims, characterized in that, if tangent lines at the absorber (2) from the center of the secondary concentrator (3) form angles A and B, respectively, with the horizontal, the part of the primary concentrator (1) of which the reflected rays form an angle with the horizontal which is smaller than the angle A or larger than the angle B, has a focus which is situated at the one side, the other side, respectively, of the absorber (2).
9.- Device according to any of the preceding claims, characterized in that the primary concentrator (1) comprises a number of flat rotatable mirror strips (4).
10.- Device according to any of the preceding claims, characterized in that the flat mirror strips (4) are directed such that the outermost rays of the parallel bundle they are reflecting towards the absorber (2) either are tangential to this absorber (2), or, after being reflected one time by the secondary concentrator ( 3 ) , touch the upper side of the absorber ( 2 ) tangentially.
11.- Device according to any of the preceding claims, characterized in that the secondary concentrator (3) comprises a mirror (11) consisting of two quasi-parabolic portions (11A and 11B) .
12.- Device according to any of the claims 1 to 10, characterized in that the secondary concentrator (3) comprises a mirror consisting of three segments with three focuses .
PCT/BE2001/000129 2000-08-07 2001-08-06 Device for utilizing concentrated solar energy WO2002012799A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001283716A AU2001283716A1 (en) 2000-08-07 2001-08-06 Device for utilizing concentrated solar energy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2000/0497A BE1013638A3 (en) 2000-08-07 2000-08-07 Device for use of concentrated solar energy.
BE2000/497 2000-08-07

Publications (2)

Publication Number Publication Date
WO2002012799A2 true WO2002012799A2 (en) 2002-02-14
WO2002012799A3 WO2002012799A3 (en) 2002-04-18

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BE (1) BE1013638A3 (en)
WO (1) WO2002012799A2 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009029277A3 (en) * 2007-08-27 2009-08-13 Ausra Inc Linear fresnel solar arrays
ITTO20090403A1 (en) * 2009-05-27 2009-08-26 Dwa S R L SOLAR THERMAL CONCENTRATOR WITH TWO STAGES.
WO2009142524A1 (en) * 2008-05-19 2009-11-26 Chaves Julio Cesar Pinto Primary concentrator with adjusted etendue combined with secondaries associated to multiple receivers and with convection reduction
WO2010024830A1 (en) * 2008-08-26 2010-03-04 Arxiel Clean Tech, Llc Linear solar energy collection system
EP2192360A1 (en) * 2007-08-17 2010-06-02 Kang, Xuehui A reflector and a solar tank-type heat collector applying it
EP2379952A1 (en) * 2008-12-29 2011-10-26 Helioris Solar Systems Ltd. A solar energy collecting system
WO2011144773A1 (en) 2010-05-19 2011-11-24 Universidad Politécnica de Madrid Device for concentrating solar radiation with longitudinal mirrors and a longitudinal receiver
ES2369460A1 (en) * 2009-03-30 2011-12-01 Francesc Martínez-Val Piera Solar cylinder-parabolic collector with uniformized radiation. (Machine-translation by Google Translate, not legally binding)
ITRM20100437A1 (en) * 2010-08-03 2012-02-04 Enea Agenzia Naz Per Le Nuove Tecnologie SECONDARY CONCENTRATOR MIRROR FOR THERMODYNAMIC SOLAR SYSTEMS WITH HIGH ACCEPTANCE ANGLE
GB2482553A (en) * 2010-08-06 2012-02-08 Simon Boaler Solar collector comprising a reflector
WO2011128082A3 (en) * 2010-04-13 2012-07-05 Solar Power Group Gmbh Solar thermal installation
ITMI20111946A1 (en) * 2011-10-26 2013-04-27 En Rinnovabili Altern Ative S R L Fab PLANT WITH CONCENTRATION OF LUMINOUS RAYS FOR THE CONVERSION OF SOLAR ENERGY AT LEAST IN THERMAL ENERGY
WO2013087556A3 (en) * 2011-12-16 2013-12-19 Schott Solar Ag Receiver system for a fresnel solar plant
WO2013087557A3 (en) * 2011-12-16 2013-12-19 Schott Solar Ag Receiver system for a fresnel solar plant
US9022020B2 (en) 2007-08-27 2015-05-05 Areva Solar, Inc. Linear Fresnel solar arrays and drives therefor
CN106164600A (en) * 2014-03-24 2016-11-23 菲涅尔有限公司 Absorbers combination

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EP0033054A1 (en) * 1980-01-09 1981-08-05 Jean Cassimatis Concentrating solar collector comprising a fixed cylindrical reflector, and its application
FR2754592A1 (en) * 1996-10-10 1998-04-17 Soleil Et Vapeur Solar energy collector
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FR1186496A (en) * 1957-11-16 1959-08-25 Apparatus for radiating radiators
US3868823A (en) * 1972-04-06 1975-03-04 Gulf Oil Corp Concentrator, method, and system for utilizing radiant energy
US4050444A (en) * 1974-05-22 1977-09-27 Peter William Dolamore Reflective device
FR2348502A1 (en) * 1976-04-15 1977-11-10 Luderitz Willy Trifocal mirror reflector system - provides single common complementary focus and two other foci for use with lamp having multiple light sources
EP0033054A1 (en) * 1980-01-09 1981-08-05 Jean Cassimatis Concentrating solar collector comprising a fixed cylindrical reflector, and its application
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Cited By (32)

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EP2192360A4 (en) * 2007-08-17 2012-10-17 Kang Xuehui A reflector and a solar tank-type heat collector applying it
EP2192360A1 (en) * 2007-08-17 2010-06-02 Kang, Xuehui A reflector and a solar tank-type heat collector applying it
US8807128B2 (en) 2007-08-27 2014-08-19 Areva Solar, Inc. Linear fresnel solar arrays
AU2008293906B2 (en) * 2007-08-27 2014-07-31 Areva Solar, Inc. Linear fresnel solar arrays
WO2009029277A3 (en) * 2007-08-27 2009-08-13 Ausra Inc Linear fresnel solar arrays
US9022020B2 (en) 2007-08-27 2015-05-05 Areva Solar, Inc. Linear Fresnel solar arrays and drives therefor
WO2009142524A1 (en) * 2008-05-19 2009-11-26 Chaves Julio Cesar Pinto Primary concentrator with adjusted etendue combined with secondaries associated to multiple receivers and with convection reduction
WO2010024830A1 (en) * 2008-08-26 2010-03-04 Arxiel Clean Tech, Llc Linear solar energy collection system
EP2379952A1 (en) * 2008-12-29 2011-10-26 Helioris Solar Systems Ltd. A solar energy collecting system
EP2379952A4 (en) * 2008-12-29 2014-07-09 Helioris Solar Systems Ltd A solar energy collecting system
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