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WO2015123788A1 - Concentrateur solaire - Google Patents

Concentrateur solaire Download PDF

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Publication number
WO2015123788A1
WO2015123788A1 PCT/CH2015/000027 CH2015000027W WO2015123788A1 WO 2015123788 A1 WO2015123788 A1 WO 2015123788A1 CH 2015000027 W CH2015000027 W CH 2015000027W WO 2015123788 A1 WO2015123788 A1 WO 2015123788A1
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WO
WIPO (PCT)
Prior art keywords
concentrator
function
absorber
concave
segments
Prior art date
Application number
PCT/CH2015/000027
Other languages
German (de)
English (en)
Inventor
Thomas Cooper
Original Assignee
Airlight Energy Ip Sa
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 Airlight Energy Ip Sa filed Critical Airlight Energy Ip Sa
Publication of WO2015123788A1 publication Critical patent/WO2015123788A1/fr

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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
    • F24S23/82—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
    • F24S23/745—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces flexible
    • 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
    • F24S2023/83—Other shapes
    • F24S2023/833—Other shapes dish-shaped
    • 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

  • the present invention relates to a concentrator according to the preamble of claim 1 and a method for producing such a concentrator according to claim 8.
  • Solar collectors with concave concentrators are mainly used in solar power plants. These are known to the person skilled in the art, they produce heat which is continuously converted into a recycling unit downstream of the solar field, for example by a turbine arrangement into electricity. On the other hand, the heat can also be used in an industrial process of any kind requiring the supply of heat.
  • the solar radiation concentrated by the solar collector can also be used photovoltaically.
  • the absorber unit can be equipped with photovoltaic cells.
  • Dish systems are equipped with paraboloid-shaped mirrors that focus the sunlight onto a focal point where a heat receiver is located.
  • the mirrors are rotatably mounted biaxially in order to be able to follow the current position of the sun and have a diameter of a few meters up to 10 m and more, which then achieves powers of up to 50 kW per module.
  • a Sterling engine installed on the heat receiver converts the thermal energy directly into mechanical work, which in turn generates electricity.
  • a photovoltaic module can also be provided at the location of the heat receiver.
  • Solar tower power plant systems have a central, raised (on the "tower") mounted absorber for hundreds to thousands of individual mirrors with mirrored to him sunlight, so that the radiation energy of the sun over the many mirrors or concentrators in the absorber concentrated and thus temperatures up to 1300 ° C can be achieved, which for the efficiency of the downstream thermal machines (usually a steam or fluid turbine power plant for power generation) is low.
  • California Solar has a capacity of several MW.
  • Parabolic trough power plants have a large number of collectors which have long concentrators with a comparatively small transverse dimension, and thus do not have a focal point but a focal line or a focal line area. These line concentrators today have a length of 20 m to 250 m.
  • an absorber tube for the concentrated heat which transports to the power plant.
  • a photovoltaic device can be provided.
  • a transport medium for heat is for example thermal oil or superheated steam in question, or even air.
  • the temperatures achievable in the absorber tube are increased, from 400 ° C now generally to around 500 ° C, with 600 ° C or even more, for example 650 ° C sought and kept realistic in the near future. Higher temperatures than those are important, as this can increase the efficiency in the downstream technical process.
  • higher concentrations of light are important for photovoltaic exploitation.
  • Parabolic trough power plants are becoming increasingly popular, with heat produced to varying degrees, for example the Martin Next Generation Solar Energy Center in Florida, which delivered 89 ⁇ 00 MWh of solar energy in 2012.
  • the pa rabeiförmige cross section of the solar panels is basically suitable to deliver high concentrations (which, as also mentioned, are also desirable or necessary in photovoltaic applications) and thus also the desired, above-mentioned higher temperatures in the absorber area.
  • channel concentrators with a geometric concentration of more than 60 are still technically demanding and correspondingly expensive to produce.
  • a real concentrator with high concentration (in the following statements, the geometric concentration C g is always meant), but at the same time can be produced at relatively low cost, is proposed in WO 2010/037243.
  • it is disclosed to approximate the parabolic cross-section of a target concentrator by spherical or arcuate, adjacent segments of a reflective membrane, which allows to achieve the desired, higher concentrations by a comparatively favorable construction.
  • the approximation of the parabolic shape by spherical segments leads inter alia to spherical aberration, ie to a deterioration compared to the concentration which can be achieved per se by a parabola.
  • the object of the present invention to provide a concentrator for a solar collector, which at realistic costs in industrial use (for example, production in large quantities or with large dimensions), but also in small or very small applications, still further improved concentration allowed.
  • a concentrator having the characterizing features of claim 1 and by a method for producing such a concentrator.
  • a method for producing such a concentrator results, with which, inter alia, for the production optimized forms of the concentrator can be realized. The invention is explained below with reference to the figures.
  • FIG. 1 a schematically shows a conventional trough collector with a pressure-loaded concentrator membrane
  • FIG. 1b shows a cross section through the concentrator arrangement for a single-reflector solar collector according to the prior art, with parabolic cross-section
  • FIG. 2a shows a cross-section through a concentration arrangement with a flat absorber
  • FIG. 3 b shows a diagram of the slope of the concentrator of FIG.
  • FIG. 3c shows a diagram of the differential function u of the focal region of the concentrator of FIG. 3a
  • FIG. 4b shows a diagram of the slope of the concentrator of FIG. 4a
  • FIG. 4c shows a diagram of the differential function u of the focal zone of the concentrator of FIG. 4a
  • FIG. la shows a solar collector 1 (which is designed here as a trough collector) according to the prior art, as it has been disclosed by WO 2008/037108.
  • the solar collector 1 has a pressure cell 2, which has the shape of a cushion and is formed by an upper, flexible membrane 3 and a hidden in the figure, lower flexible membrane 4. Via a fluid channel 5, the pressure cell 2 is maintained under operating pressure, wherein further a fluid channel 6 is provided, the function of which is described in more detail with reference to Figure lb and the expert from WO 2008/037108 known.
  • the membrane 3 is permeable to sun rays 7, which fall inside the pressure cell 2 onto a concentrator membrane (for example a concentrator membrane 15 according to FIG. 1b or a simple, unsupported membrane) and are reflected by these as jets 7 ' to an absorber tube 9, in which a heat-transporting medium circulates and dissipates the heat concentrated by the collector.
  • a concentrator membrane for example a concentrator membrane 15 according to FIG. 1b or a simple, unsupported membrane
  • an absorber tube 9 in which a heat-transporting medium circulates and dissipates the heat concentrated by the collector.
  • the absorber tube 9 is held by supports 10 in the focal line region of the concentrator membrane 8.
  • the pressure cell 2 is clamped in a frame 11, which in turn is mounted according to the position of the sun pivotally mounted on a frame.
  • Frame and frame as such are known to the person skilled in the art and will be removed in the following figures for the purpose of relief. let or only schematically indicated.
  • the FIGURE shows a one-mirror system with a concentration arrangement which has a concentrator, namely the concentrator membrane 15 and a round absorber, here an absorber tube 9.
  • FIG. 1 b shows a cross-section through a further one-reflection concentration arrangement for a trough solar collector according to the prior art of the type shown in FIG. 1 a, wherein, however, the concentrator according to the invention of WO 2010/037243 is formed:
  • a concentrator membrane 15 is clamped under pressure in a pressure cell 16 during operation, wherein the operating pressure for the concentrator membrane 15 and for this associated clamping membrane 15 ', 15 "by a series of preferably designed as fans fluid pumps 16 to 19 is generated.
  • Membrane 15 concentrates solar radiation 7, 7 'on an absorber tube 20, which is functionally designed as a flat absorber because of its slot-shaped thermal opening 24.
  • the concentrator Membrane 15 arcuately curved, juxtaposed segments 21 to 23, which emulate a parabola, each of the segments rays concentrated in a focal line area, but coincide the focal line areas due to the simulated parabolic shape at the location of the absorber tube 20.
  • the concentrator membrane 15 extends continuously through the segments 21 to 23 and is, as mentioned, in segments on a clamping membrane, in the segment 23 on the two clamping membrane 15 ', 15 ", in the segment 22 on a clamping membrane 15', in the segment 21, it is guided freely without it resting on a tensioning membrane
  • the person skilled in the art knows the structure of this arrangement from WO 2010/037243.
  • a pressure-loaded membrane does not form exactly spherical or arcuate, but only almost, wherein the assumed shape for rotationally symmetric membrane by the Henky - function is described.
  • the Henky function shows a slightly greater deflection in the edge zones and somewhat weaker center deflection, the term "circular arc" is always used in the present description because the deviation of a circular arc from, for example, the Henky function, in particular Is negligible with respect to the geometric concentration of an on - mirror concentrator.
  • Figure 2a shows schematically the geometric relationships in a concentration arrangement 25 with a flat absorber 26, wherein to relieve the figure, only the right side 27 of a concave concentrator 28 and a part of the left side 29 of the concentrator and from the concentrator 28 illuminated from below, flat Absorber surface 30 is shown.
  • An axis of symmetry 31 divides the right, illustrated half 27 of the concentrator and the left, not shown half 28 and lies on the optical axis of the concentrator 28.
  • the absorber 26 shadows a portion 32 of the right 27 and left side 29 of the concentrator 28, the is indicated approximately by the dashed lines.
  • the concentrator assembly 25 is oriented such that central beams 32 from the center of the sun 33 (or parallel beams) parallel to the axis of symmetry 31, i. paraxial, incident on the concentrator 28. Edge rays 34,34 'of the sun fall with respect to the central rays 32 at the acceptance angle ⁇ , a.
  • the acceptance angle ⁇ is determined by the person skilled in the art for the design of the concentrator in a specific case, it may for example be 0.27 °, which corresponds to the radius of the solar disk, or be chosen larger, if radiation from the corona of the sun also with should be detected, or if errors in alignment or other geometrical deviations are to be considered.
  • a coordinate system with the horizontal axis x and the vertical axis z has its origin on the absorber surface 30.
  • the concentrator has a general, concave cross section, which is described by the function z of the concentrator cross section.
  • the outermost point P 0 of the concentrator has the coordinates (x 0 , -z 0 ), a central ray 32 incident there is reflected into the point Q on the absorber surface 30, which due to the general function z does not lie on the axis of symmetry 31 either can.
  • the edge beams 34, 34 'incident in the point Q.sub.i are reflected in the points A and B on the absorber surface 30, respectively.
  • the rim angle ⁇ denotes the angle between the central ray 32 reflected from P 0 to the point O.
  • the rim angle ⁇ is used to determine the aperture width a, for a given function z.
  • the figure also shows that this is determined by ⁇ , and ⁇ : ⁇ , the cone of the reflected rays, starting from the outermost point P 0 , ⁇ , again determines the slope of the function z im Point P 0 , which determines the direction of the cone. If P 0 is varied, the width of the absorber surface 30 also changes. Since the geometric concentration C g is defined as the ratio of the aperture width a to the width of the absorber a 0 , in the variation of P 0 (always given a ⁇ ), the concentration C g remains constant. The geometric concentration C g remains the same if the system is enlarged or reduced by uniform stretching (geometric similarity)
  • the rim angle ⁇ and the acceptance angle ⁇ are thus the two parameters which characterize a concentration arrangement 25 with regard to the geometric concentration C g .
  • FIG. 2b shows a cross-section through a concentration arrangement 40 which corresponds to the concentration arrangement of FIG. 2a, with the exception of the here round absorber 41, which has the radius r 0 .
  • FIGS. 2 a and 2 b show cross sections through channel concentrators (2D concentrators), with a rotation about the axis of symmetry 31 resulting in dish concentrators (3D concentrators), which are likewise in accordance with the invention.
  • Equation (2) and (3) thus show the respective limit for the geometric concentration C g , taking into account the parameters ⁇ and 8j for concave concentrators.
  • the maximum concentration according to equations (2), (3) is always smaller than that of (1).
  • equation (2) describes this for a flat absorber
  • equation (3) for a round absorber.
  • equations equivalent to (2) and (3) have to be set up, which the person skilled in the art will be able to do analogously to the above equation. showed way for the flat and the round concentrator can do.
  • This also applies to the differential function u of the combustion region described below and its application for the determination of a function z of the concentrator cross section according to the invention.
  • a concave concentrator for a trough collector with a flat (or round) absorber surface is described herein as preferred embodiments, wherein, as mentioned, the invention also includes 3D concentrators and, for both, all imaginable embodiments of the absorber (ie not only flat or round ).
  • the function z of the concentrator cross section can now be determined according to the invention such that a corresponding concentrator can be produced in a simplified manner but nevertheless reaches the limit of equations (2) or (3) - or their equivalent equations for other embodiments of the absorber - which means in that a concentrator which can be produced in a simplified manner (or for other reasons with a different cross-section) can be optimally concentrated, ie not further improved with regard to the geometric concentration C g .
  • the geometric concentration C g has been determined by means of the point P 0 , ie without making sure that the concentrator over its entire reflecting surface, here in the interval [1, Xo], actually all in the range between ⁇ Q, incident rays within 2a 0 ( Figures 2a and 2b) concentrated on the absorber. But this is an implicit condition of etendue according to equation (1).
  • the differential function u of the focal region describes the location at which a beam incident on the general point P at an angle ⁇ in the concentrator z is reflected onto the absorber.
  • the differential inequalities (7) are abstract and do not show what a function z fulfilling this function looks like.
  • the parabola is a solution.
  • the focal length f 0 cot ⁇ I>
  • the focal point of which is the coordinates F (0, z 0 + x 0 cot ⁇ D) having. This determines the parabola and can be recorded: FIG.
  • a concentrator profile according to a general function z can correspondingly only reflect all the rays within the acceptance angle onto the absorber if z lies within the region B spanned by z R and z L , ie does not break it. If z lies in the region B, ie within z R , z L , the reflection of all rays within the acceptance angle to the absorber is possible, but not mandatory.
  • the parabola can be a solution of the differential inequalities (7) and thus enable maximum geometric concentration C g , as long as it captures all the rays within the acceptance angle for the absorber.
  • each function z whose derivative z 'lies in the region B' spanned by z ' R and z' L represents a solution of the differential inequalities (7), e.g.
  • a concentrator function z for maximum geometric concentration C g can be found by computationally determining a function z 'in the interval graphically or from z' R and z ' L and then numerically or, if possible, analytically integrated. (It should be noted that a function z whose derivative z 'leaves the interval P may still be a solution to the differential inequalities.)
  • a function assumed on whatever basis
  • equation (7) is used to determine if all rays are reflected on the absorber. If Equation (7) is satisfied, the concentrator reflects all the rays onto the concentrator, thus reaching the maximum concentration.
  • the presumed parabola is also a solution of equations (7) and allows maximum geometric concentration C g .
  • the parabola can serve as a reference for whether a non-parabolic function z describes a concentrator cross-section with maximum geometric concentration C g .
  • the parabola allows maximum geometric concentration - if a general concentrator concentrates equally well in comparison, it is a concentrator according to the invention.
  • the comparison must be an equivalent to the general concentrator, ie the parabola referred to here as the "reference parabola”, which can simply be determined from the geometry of the general concentrator.
  • the reference parabola can simply be determined from the geometry of the general concentrator.
  • its rim angle ⁇ can be measured and an acceptance angle ⁇ , known for this (or simply assumed), can be determined.
  • the reference parabola is determined, preferably this can be assumed with the same aperture width a.
  • the geometric concentration C g of the reference parabola can be determined - if the geometric concentration C g of the general concentrator z is equal to or essentially the same (for example manufacturing tolerances), the general concentrator z is a concentrator according to the invention. It is immaterial which absorber or which acceptance angle Q t is possibly accepted - the only essential is that they are then also used for the reference parabola. This comparison can be much simpler than the analysis of whether a generally shaped concave concentrator satisfies the differential inequalities (7).
  • the reference parabola can be easily determined from the structure of a general concentrator z, and thus (possibly assuming an equal absorber and acceptance angle ⁇ ,) of its geometric concentration C g .
  • a concave concentrator according to the invention is characterized in that it is not parabolic, but designed such that in operation its geometric concentration C g essentially corresponds to that of its reference parabola with absorber of the same design, which with the concave concentrator is parallel to the axis incident central rays of the sun has the acceptance angle ⁇ , and the rim angle ⁇ in common.
  • FIG. 3c shows a diagram on whose horizontal axis the span x of the concentrator with the concentrator cross-section z (FIG. x) and on whose horizontal axis the values for the differential function u of the combustion region are plotted.
  • These extreme solutions z R and z L must not exceed the values of -1 ⁇ u ⁇ 1 for our assumed function z to be checked, otherwise the differential inequalities (7) would not be satisfied, ie the assumed function z would describe a concentrator that does not allow maximum geometric concentration.
  • a concentrator with a cross-section of a general function z allows maximum geometric concentration when the extreme solutions z R and z L are in the ranges B g , that is, do not exceed the values of -1 ⁇ u ⁇ 1.
  • the result is an (analytical or numerical) method in which a possible function z (on whatever basis) is assumed and checked whether an extreme solution of the differential function u formed in z leaves the validity range B g , in which case z is rejected, otherwise but is used to form the concentrator.
  • a parabola z Pb that has its focal point in the origin. which is a solution of the differential inequalities (7) and extreme solutions z R and z L , which are based on equations (6a) and (6b).
  • the extreme solutions z R and z L describe a tilted parabola whose focal point lies at points A and B (FIGS. 2 a and 2 b).
  • the resulting curve is a parabola with the focal point in B whose axis is parallel to the - ⁇ , rays.
  • the same applies to the extreme right solution z R where a parabola with the focal point in A results, the axis of which is parallel to the + ⁇ rays.
  • the concentrator 100 is shown in cross section (part (a)), which is represented by a function z (x) is described.
  • the concentrator 100 is formed by arcuate segments 101, 102 and 103 bounded by the outermost point P 0 and the points Ni, N 2 and the innermost point N 3 . Two adjacent segments have a common point ⁇ or N 2 .
  • a point on the jth segment can be found by
  • equation (13) represents the curve z (x) of an arcuate segment of the concentrator to be determined
  • (13) can be used in equation (5), with the following for the jth segment:
  • ri Since ri is now determined, it is the first segment 101 as well, as soon as the value ⁇ , ⁇ ⁇ is selected for its parameter cp. For the minimum number of segments, the segment 101 should extend as far as possible, but must not violate the differential inequality (7). This is ensured by choosing ⁇ p in i SO such that u f
  • Ati As ( ⁇ Pin, i, - 9 -1 is not violated, ie the - ⁇
  • marginal ray 105 does not exceed the value for u -1, so that the first segment 101 is defined.
  • the subrange B N for the function z N is bounded by the location where the functions
  • the differential function u leaves the region B formed by the two extreme solutions of the function u (where u is placed here for the predetermined values of ⁇ ⁇ , and ⁇ ).
  • the expansion of the subarea B N is maximized by optimizing at least one parameter of the function z N accordingly. In the case of the arcuate segments, this is done by optimizing the radius of curvature of the circle equation, in the case of another desired contour, the skilled person can identify and adapt the analog parameter.
  • a first function z x is assumed starting at the outermost point P 0 and the first area B 1 is bounded by the location where the function z x leaves the limits of the differential function u and in the subsequent interval h for the function z 2 the slope of Zi is taken over at the location of the common point of the functions Zi and z 2 , and so on, until the entire interval I has passed.
  • the minimum number of arcuate segments is realized. Of course, a larger number of segments can be provided, depending on the needs in the specific case.
  • Another contour of the segments can be provided by substituting the parameters for the other contour in equation (5) instead of the elements for one circle (radius of curvature and center of the circle) and then determining the concentrator function z analogously to the method described above becomes.
  • This also makes it possible to provide one (or more) planar segments, or possibly even a convex one, always so far, and arranged and designed so that the differential inequalities (7) remain satisfied.
  • the arcuate segments (or at least one) are formed by a reflective, flexible pressure-loaded membrane in operation, analogous to the configuration of Figure lb. More preferably, then the reflective membrane extends over several segments of the concentrator, s. also Figure lb.
  • the required radius of curvature may be adjusted by one skilled in the art as follows:
  • T 0 PoRo known to those skilled in the art.
  • T 0 is the line voltage (N / m, ie the force acting per m membrane length at the edge of the membrane as a result of its clamping into it), whereby the thickness of the membrane does not matter).
  • p 0 is the pressure on the membrane, the (arcuate) curvature causing (difference) pressure and R 0 the resulting radius of curvature of the membrane.
  • the length of the radius of curvature R 0 can be adjusted via the variation of the line tension T 0 , ie the force with which the membrane is prestressed or unclamped.
  • the concentrator according to the invention therefore preferably has the following structural elements which the person skilled in the art can suitably combine:
  • the concentrator has at least one essentially arcuate segment
  • the concentrator consists of essentially arcuate segments
  • the concentrator has at least one substantially planar segment
  • the concentrator has a reflective, flexible, pressure-loaded during operation membrane preferably extends over a plurality of segments of the concentrator
  • the reflective membrane of the concentrator is placed in segments on other membranes, such that the segments have a different curvature.

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Abstract

La présente invention concerne un concentrateur non parabolique qui est conçu de sorte à atteindre la concentration maximale Cg possible pour des concentrateurs concaves présentant un angle de bord Φ et un angle d'acceptance Θ. Un procédé de fabrication d'un tel concentrateur fait appel à une fonction différentielle u pour la détermination de la section transversale z(x) du concentrateur, de telle sorte que la concentration géométrique maximale Cg est atteinte. Selon un mode de réalisation préféré, le concentrateur selon l'invention est composé de segments en arc de cercle.
PCT/CH2015/000027 2014-02-20 2015-02-20 Concentrateur solaire WO2015123788A1 (fr)

Applications Claiming Priority (2)

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CH2342014 2014-02-20
CH234/14 2014-02-20

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WO2015123788A1 true WO2015123788A1 (fr) 2015-08-27

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000366A1 (fr) * 1980-07-17 1982-02-04 S Zeilon Reflecteur
DE4413056C1 (de) * 1994-04-15 1995-09-28 Htc Solar Forschungscentrum Gm Mehrkammer-Membran-Solarkonzentrator
US20020073987A1 (en) * 2000-02-10 2002-06-20 Heiji Fukutake Solar energy collector assembly
WO2008037108A2 (fr) 2006-09-27 2008-04-03 Ale Airlight Energy Sa Collecteur de rayonnement
US20090188562A1 (en) * 2008-01-29 2009-07-30 Thales Research, Inc. Fin-type compound parabolic concentrator
WO2009117840A2 (fr) * 2008-03-28 2009-10-01 Ale Airlight Energy Sa Capteur cylindro-parabolique pour centrale solaire
CH699605A1 (de) * 2008-09-30 2010-03-31 Airlight Energy Ip Sa Sonnenkollektor.
US20110100419A1 (en) * 2009-11-03 2011-05-05 Palo Alto Research Center Incorporated Linear Concentrating Solar Collector With Decentered Trough-Type Relectors
US20120014006A1 (en) * 2011-09-23 2012-01-19 Edward Herniak Quasi-parabolic solar concentrator and method

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000366A1 (fr) * 1980-07-17 1982-02-04 S Zeilon Reflecteur
DE4413056C1 (de) * 1994-04-15 1995-09-28 Htc Solar Forschungscentrum Gm Mehrkammer-Membran-Solarkonzentrator
US20020073987A1 (en) * 2000-02-10 2002-06-20 Heiji Fukutake Solar energy collector assembly
WO2008037108A2 (fr) 2006-09-27 2008-04-03 Ale Airlight Energy Sa Collecteur de rayonnement
US20090188562A1 (en) * 2008-01-29 2009-07-30 Thales Research, Inc. Fin-type compound parabolic concentrator
WO2009117840A2 (fr) * 2008-03-28 2009-10-01 Ale Airlight Energy Sa Capteur cylindro-parabolique pour centrale solaire
CH699605A1 (de) * 2008-09-30 2010-03-31 Airlight Energy Ip Sa Sonnenkollektor.
WO2010037243A2 (fr) 2008-09-30 2010-04-08 Airlight Energy Ip Sa Collecteur solaire
US20110100419A1 (en) * 2009-11-03 2011-05-05 Palo Alto Research Center Incorporated Linear Concentrating Solar Collector With Decentered Trough-Type Relectors
US20120014006A1 (en) * 2011-09-23 2012-01-19 Edward Herniak Quasi-parabolic solar concentrator and method

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