[go: up one dir, main page]

WO2009034211A2 - Concentrateur optique à gain élevé et paramètres variables (copv) - Google Patents

Concentrateur optique à gain élevé et paramètres variables (copv) Download PDF

Info

Publication number
WO2009034211A2
WO2009034211A2 PCT/ES2008/000590 ES2008000590W WO2009034211A2 WO 2009034211 A2 WO2009034211 A2 WO 2009034211A2 ES 2008000590 W ES2008000590 W ES 2008000590W WO 2009034211 A2 WO2009034211 A2 WO 2009034211A2
Authority
WO
WIPO (PCT)
Prior art keywords
light
cell
high gain
lens
concentration
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/ES2008/000590
Other languages
English (en)
Spanish (es)
Other versions
WO2009034211A3 (fr
Inventor
Emilio GÓMEZ GONZÁLEZ
Javier MÁRQUEZ RIVAS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universidad de Sevilla
Original Assignee
Universidad de Sevilla
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 Universidad de Sevilla filed Critical Universidad de Sevilla
Publication of WO2009034211A2 publication Critical patent/WO2009034211A2/fr
Publication of WO2009034211A3 publication Critical patent/WO2009034211A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/027—Mountings, adjusting means, or light-tight connections, for optical elements for lenses the lens being in the form of a sphere or ball
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
    • G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0076—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a detector
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation

Definitions

  • the object of the present invention is a device that allows the optical concentration of the light rays that affect a part thereof called “surface or area of illumination or acquisition (Al)” in another part of the device, called “surface or concentration area (AC) ".
  • the sensor or cell or device on which it is desired to influence the concentrated light is located in the position defined as AC.
  • This optical concentration system can be used in electrical energy production systems by means of the conversion of solar energy, placing a photovoltaic cell or similar device in AC or in any other assembly in which it is of interest to achieve a very high concentration of light in an area ( AC) much smaller than the surface on which the light falls (Al).
  • AC surface or concentration area
  • Optical concentration systems are used, mainly in the field of photovoltaic solar energy (photovoltaic, PV).
  • the objective of these systems is to concentrate the incident light on them in an area of much smaller size (area) in which the photovoltaic cell is located that converts the incident light on it into an electric current.
  • the performance of the optical concentration systems can be evaluated by defining two main geometric parameters: the concentration factor (concentration / on ratio, CR) and the angular acceptance (AA).
  • the CR is the ratio between the area of capture of the light, that is, the area of the device on which the light that is transmitted by it affects, and the area of focus produced by the device. As this area is smaller than the collection area, the CR is larger than the unit.
  • the systems When the systems have a CR> 20Ox, they are usually defined as "high concentration systems", although this limit is not uniquely defined in the literature.
  • the AA defines the semi-angle of the light acceptance cone of the device that guarantees that the light transmitted by it affects the cell (maximum angle with respect to the axis of the system that can form an incident beam so that it affects the cell ).
  • the optical efficiency of the The system is defined by its transmissivity, depending on the light absorption and reflection characteristics of the materials with which the optical elements have been manufactured.
  • the assembly formed by the optical system of concentration and the photovoltaic cell (with its circuitry and connections) is called “element” and is the fundamental unit producing electricity.
  • a set of elements are mounted on a common surface, forming a "module”, and a set of modules forms a "panel”.
  • the panel is located on a mobile support structure, controlled by a solar tracking device (tracker) that, controlled by a computer or processing system, orients the panel and, therefore, to all modules, pointing in the direction of the sun at The length of daylight hours.
  • the optical concentration systems can be classified into the following groups: i) Concentration systems based on total internal reflection lenses (TIR) ii) Concentration systems based on flat Fresnel lenses iii) Concentration systems based on Fresnel lenses curves iv) Concentration systems based on telescope geometries v) Concentration systems based on large concentrating mirrors
  • the first element concentrates the light on the second, which redirects it, homogenizing the beam, on the photovoltaic cell.
  • This secondary element can be a TIR component - in the most sophisticated systems - or a lens (or set of mirrors) in the form of an inverted pyramid, with the cell in the area near the vertex.
  • the secondary element is located in the focal area thereof, so that the distance between both elements (primary and secondary) is at least of the order of the corresponding focal length.
  • optical elements When optical elements are not image-forming, but they can be used to transmit light, they are called “non-imaging optics” or “anidolic optics” elements. Usually, elements of this type work by redirecting the light inside by the phenomenon of total internal reflection, although, unlike the TIR lenses, they cannot be used to form an image.
  • both in the systems with an optical element focused on the cell and in the systems with two optical elements perfect alignment between the elements or between the lens and the cell is essential. This introduces notable difficulties in the machining and assembly of the modules, since small angular differences between the optical axes of both elements cause that the concentrated light does not affect the cell or that it is reflected or refracted outside it by the second element.
  • the AA of these devices is very small (typically, AA ⁇ 1 o ).
  • Systems based on a TIR lens and a secondary element are remarkably more compact than those based on Fresnel lenses (called “flat systems") but, when both elements are separated, they have the same drawback of the need for very high precision in the alignment between the two optical elements and, consequently, a very reduced AA.
  • the need for the beam focused by the primary element to converge on the secondary requires that the solar light beam strikes the lens in the same direction defined by the lens axis. cell or lens-secondary element, so that it is critical - and very high cost - the use of a very high resolution tracking system that keeps the panel perfectly oriented at all times.
  • Concentration systems based on large concentrating mirrors They are not described as large systems (in the range of 1 m to 10 m) and, therefore, manufacturing, assembly and use conditions totally different from the objectives of interest for A system like the one proposed.
  • This section includes both systems based on flat mirrors and parabolic plates or valleys and the like.
  • FIG. 1 Profile of the segments that define the internal total reflection lens called "part E1" or stage E1 of the device.
  • FIG. 1 Profile of the components that define the part or stage E2 of the device.
  • the piece E2 is obtained by revolution of this profile around the horizontal "OY" axis, which is the axis of symmetry thereof.
  • EFL effective focal length
  • BFL posterior focal distance
  • F focus position of spherical lenses.
  • the light concentration zone where the photovoltaic cell is located corresponds to an illuminated diameter "di".
  • This surface made of a material with high thermal conductivity, transmits the heat to the support base of the complete device (9) on which the heat sinks (10) are mounted, represented by fin-type profiles or of any other type.
  • the support base (7) can be threaded or glued or otherwise secured in (8) to the support cylinder (3).
  • Figure 3. Overall view (profile in the "xy" plane) of the proposed Optical Concentrator. The system has revolution symmetry around the horizontal axis (OY) and its operating orientation is vertical (vertical OY axis). For clarity, the system has been represented in a horizontal position showing the elements only in the upper half of the figure. The incident light rays (17) are therefore represented on the horizontal axis, from left to right.
  • (1) is the optional cover glass sheet
  • (2) is the total internal reflection lens (part or stage E1).
  • (3) and (4) are, respectively, the first and second spherical lenses of the part or stage E2, contained in the cylinder (12), held in position by the part (11).
  • (5) is the support base of the complete module (device), on which the photovoltaic cell or sensor (8) is located, located on the part (7) that places it at the appropriate distance from the sphere (4) for reach the appropriate level of light concentration (on the AC surface, illuminated face of (8)).
  • the thermal contact for the heat evacuation of the cell (8) with the support base (5) (in contact with the heatsinks (9)) is made through the piece (7) but can be increased by the conduction paste thermal (6) deposited in the contour of (8) and envelope (5).
  • the fin heatsinks (9) are attached to the base (5).
  • the lens E1 (2) is secured by means of the piece (15), attached to the area where the lens is attached and to the structure (18) (rod or wall) that supports the complete system: the cover (1) is fixed to ( 18) in (16) and the base (5) in (10).
  • the piece (11) keeps the spheres (3) and (4) in position, in contact with each other at point Q, inside the cylinder (12), attached to the base (5) in (19).
  • C is the position of the center of curvature of its anterior spherical surface
  • D is its diameter
  • Fp is the position of the paraxial focus defined by the effective focal distance
  • F1 is the position of the focus on which the rays that do not meet the paraxial approach (rays that fall far apart from the optical axis and symmetry of the system) affect.
  • AC1 is the area of concentration of light at the exit of E1 and AC is the area of concentration of the entire system.
  • the device object of the present invention consists of two parts called
  • the device works by redirecting the light rays that affect the catchment area (from E1) by means of the physical phenomena of refraction and total internal reflection (total internal reflection, IRR) of the light on the external border separating surfaces and the means (materials) of which the device is made.
  • the E1 is, in summary, a TIR lens (anidolic lens) with a new design of cylindrical symmetry of revolution around its longitudinal axis while the E2 is the set formed by two spherical lenses that collide and concentrate the emerging light beam of E1.
  • the E1 + E2 set forms a unit (module), equipped with its own support structure, which can be machined and assembled individually or forming a set (matrix or array).
  • the set of two spherical lenses constituting E2 is contained in a cylinder jointly connected to E1 and coaxial with E1.
  • Each module (E1 + E2) also consists of a set of heat sinks (dissipative fins or heat sinks), jointly connected to E1 or E2 that dissipate the heat produced by the light concentration.
  • Each module can optionally have a surface of glass (or other transparent material), flat or otherwise, located on the surface of acquisition of E1.
  • This flat sheet is of interest when a set of modules are mounted on a support plane to be placed outdoors because it prevents the accumulation of dirt in the spaces between modules, facilitating its cleaning well by mechanical means (cleaning systems, water, etc.). .) or simply by the action of the wind (especially if the plane is inclined).
  • Each module (E1 + E2) can also be mounted on a support surface, on which the support structure of El is fixed
  • the photovoltaic cell can be located on this support surface, at the distance of E2 defined by the factor of concentration that you wish to reach, or directly linked to E2 (attached or jointly joined).
  • the incident light on Al is concentrated on the concentration area of E1, called AC1, and leaves (emerges) from E1 through AC1 in the form of a divergent beam, contained in the so-called " E1 "output cone.
  • the E2 is the set formed by two spherical lenses contained in a cylindrical tube coupled to the body of EI 1 coaxial with E1 and whose optical and symmetry axis coincides with the axis of symmetry of E1.
  • the parameters of E2 are calculated in such a way that the output cone of E1 enters the input cone ("acceptance cone") of the first sphere of E2.
  • This beam of light emerges from that first sphere in the form of a collimated beam that, upon impacting on the second sphere, is concentrated by it in the form of an exit cone whose section (perpendicular to the axis) decreases along the axis of the system until it reaches to the focal point (image focus) of the second sphere of E2.
  • That section of the exit cone of the second sphere of E2 along the axis of the system is the "concentration area (AC)" of the system and can be made as small as desired, from the position immediately in contact with the second sphere of E2 (position of minimum concentration) until being in the referred focus of the second sphere of E2 (position of maximum concentration).
  • an intermediate means such as an optical silicone or other transparent material of suitable refractive index so that the emerging light of E2 affects on said sensor.
  • the sensor or cell where it is desired to make the light influence for its conversion into electricity (photovoltaic cell) or any other purpose must thus be placed perpendicular to the optical axis (of system symmetry), at any position in the same between the aforementioned positions of minimum and maximum concentration.
  • the size of the AC (and the other dimensions of the device) can be made very small in relation to the Al , so the so-called “factor of concentration or gain "(concentration ratio, CR) can be very high, greater than 200Ox or even higher.
  • angular acceptance (AA) cone of maximum light input
  • the cone of (maximum) light input into the system is defined by the (double of the) angle formed by the optical axis (axis of symmetry) of the system and the direction of the beam which, affecting the limit of the acceptance surface (Al of E1) , it forms the maximum angle such that, after impacting on E1, it will be redirected (through successive TIR reflections) towards the AC of the device.
  • the available concentrating devices i) based on Fresnel lenses have a height of the order of 30 cm or greater and a diameter of the order of 25 cm or greater, to achieve factors of concentration of the order of 50Ox, with very low angular acceptance (of the order of AA ⁇ 0.5 °) and difficult and expensive assembly (due to the need to align - with very high precision - the lens and the cell) and i) the most advanced, based on TIR lenses plus a secondary element, even having smaller sizes (height of the order of 8 cm and diameters of the order of 5 cm) with concentration factors of 1000x, also have a very reduced angular acceptance (AA ⁇ 1 o ) , being also very difficult and expensive assembly (due to the need to align - with very high precision - the lenses and secondary elements).
  • variable geometric concentration factor from low values (in the order of 10x) to very high values (greater than 200Ox) without more than modifying the relative position of the cell or sensor of the light in the optical axis of the system
  • high angular acceptance AA
  • angle acceptance cone in the range 10 ° -30 ° and higher
  • the proposed system is useful in any industrial or research application or of any other type in which it is necessary to concentrate the incident light on it in an area much smaller than the area of incidence, in which a sensor or receiver cell, with the aforementioned conditions of gain (concentration factor), angular acceptance, compactness, volume and weight and manufacturing cost.
  • gain concentration factor
  • angular acceptance angular acceptance
  • compactness compactness
  • volume volume
  • weight manufacturing cost
  • the shape of the part E1 is defined by characterizing the shape of its profile in a meridian plane containing its axis of symmetry and rotating that plane around said axis.
  • the lens E1 is defined by i) the intersection of a circumference curve (or ellipse) that defines its anterior face (surface Al, in which the light rays enter the system), ii) the two branches of a logarithmic curve (which defines the lateral walls of the E1, where the successive TIR reflections that take the light rays to the AC surface take place) ) and iii) a straight line that defines the flat surface that forms the AC.
  • each module (E1 + E2) can also be mounted on a support surface, on which the support structure of E1 is fixed.
  • the photovoltaic cell or sensor can be located on this support surface, at the distance of E2 defined by the concentration factor that is desired to be reached, or directly linked to E2 (glued or joined together), not being necessary that the module (E1 + E2) or E2 (or any other element) rest (resting) on the cell or sensor, avoiding possible damage to it by the weight and / or pressure of the components.
  • the lens that forms E1 can be made of acrylic material for optical use (for example, PMMA), methacrylate, glass or optical glasses and can be made by means of conventional procedures (including those of low manufacturing cost) of molding, injection, polishing and others.
  • the spherical lenses that form E2 must be of a high refractive index material, such as optical glasses and, for the dimensions required for the solar cells currently used (square, with a side between 1 mm and 10 mm) they are of size and characteristics standard, and can be purchased from various manufacturers of optical components.
  • the cylindrical support tube where these lenses are housed can be made of a material that facilitates thermal dissipation, such as aluminum, copper or others.
  • the support structure of E1 and the support plane can be of these or other materials, depending on the manufacturing process.
  • the optional flat sheet should be of an optimally transparent glass, with a suitable combination of low reflectivity and adequate absorption and resistance.
  • the use (to manufacture E1 or in the aforementioned flat cover sheet or in E2) of low cost materials with reduced optical efficiency (high reflectivity and absorption, which would significantly reduce the transmitted energy and, consequently, the energy incident on the cell or sensor) can be compensated by placing the said photovoltaic cell or sensor in a position (along the optical axis) closer to the focal point image of the second sphere of E2 (since this increases the geometric concentration factor which the system provides).
  • Each module (E1 + E2) also consists of a set of heat sinks (dissipative fins or heat sinks), jointly attached to E1 or E2 that dissipate the heat produced by the light concentration.
  • These heatsinks can be conventional (aluminum) fin dissipators, located (attached) on the support surface of the module holding structure (E1 + E2) and in contact with the support surface or rear face of the photovoltaic cell or sensor, to dissipate, by convection, the heat accumulated in it by the concentration of the light rays.
  • the effective area available for placing heatsinks is, in each module, the area corresponding to the input surface (Al) minus the area (section) of E1 or the cylinder of E2 (maximum AC value).
  • the area Al is much larger than AC, the surface available for mounting heatsinks is almost equal to Al.
  • the height that the heatsinks may have is between the support surface (base) of the module (E1 + E2) and the edge for holding part E1.
  • each of the segments that constitute part E1 ( Figure 1, with horizontal axis OX and vertical OY, the latter being the axis of symmetry and optical axis of the system) is defined by the following curves (considering the system with vertical orientation and incidence of the light from top to bottom): i.1) upper part: defined by a center circumference on the vertical axis (of symmetry) or by an ellipse centered on the vertical axis, with a horizontal major axis.
  • base defined by a flat (straight) section perpendicular to the longitudinal axis
  • part E1 is generated by means of the revolution, with the axis of symmetry of the figure, of the profile represented in Figure 1.
  • n1 index of refraction of the medium that surrounds the sphere (air)
  • n2 index of refraction of the medium from which the sphere is made
  • F effective focal length (EFL, measured from the center of the sphere).
  • BFL back focal length (back focal length, measured from the point of intersection of the optical axis of the system with the back of the sphere)
  • AN numerical opening. Measurement of the cone of entry / exit of light in the sphere.
  • the part E2 of the proposed device consists of two equal spheres, in contact with each other, and with the light output surface (AC1) of E1, aligned on the axis of E1, and contained in a clamping cylinder jointly attached to E1.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Toxicology (AREA)
  • Photovoltaic Devices (AREA)
  • Hybrid Cells (AREA)

Abstract

L'invention porte sur un dispositif qui permet d'effectuer la concentration optique de rayons lumineux incidents sur une partie du dispositif appelée 'surface ou zone d'illumination ou de captation (AI)' dans une autre partie du dispositif, appelée 'surface ou zone de concentration (AC)'. Le capteur ou la cellule sur laquelle on souhaite voir frapper la lumière concentrée est située en une position défine par AC. Le système optique de l'invention peut être utilisé dans des systèmes de production d'énergie électrique faisant appel à une conversion d'énergie solaire, AC étant situé dans une cellule photovoltaïque ou un dispositif analogue ou dans tout autre type de montage sur lequel on souhaite voir frapper une concentration de lumière très élevée dans une zone (AC) significativement plus petite que la surface sur laquelle vient frapper la lumière incidente (AI). Le dispositif de l'invention est destiné, entre autres applications, à la production d'énergie électrique à partir de l'énergie solaire via des systèmes photovoltaïques à haute concentration.
PCT/ES2008/000590 2007-09-14 2008-09-12 Concentrateur optique à gain élevé et paramètres variables (copv) Ceased WO2009034211A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200702479 2007-09-14
ES200702479A ES2325939B2 (es) 2007-09-14 2007-09-14 Concentrador optico de alta ganancia y parametros variables (copv).

Publications (2)

Publication Number Publication Date
WO2009034211A2 true WO2009034211A2 (fr) 2009-03-19
WO2009034211A3 WO2009034211A3 (fr) 2009-05-07

Family

ID=40452608

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2008/000590 Ceased WO2009034211A2 (fr) 2007-09-14 2008-09-12 Concentrateur optique à gain élevé et paramètres variables (copv)

Country Status (2)

Country Link
ES (1) ES2325939B2 (fr)
WO (1) WO2009034211A2 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4712885A (en) * 1985-10-31 1987-12-15 Loral Electro-Optical Systems, Inc. Laser diode optical system
FR2604262B1 (fr) * 1986-09-24 1990-04-06 Deutsch Co Dispositif de connexion pour fibres optiques
US4792685A (en) * 1987-04-29 1988-12-20 Masami Yamakawa Photoelectric sensor
DE3818229C1 (fr) * 1988-05-28 1989-12-07 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
RU2126986C1 (ru) * 1997-11-24 1999-02-27 АРСЕНИЧ Святослав Иванович Оптический растровый конденсор и оптическое изделие с растровым конденсором

Also Published As

Publication number Publication date
ES2325939B2 (es) 2010-02-01
ES2325939A1 (es) 2009-09-24
WO2009034211A3 (fr) 2009-05-07

Similar Documents

Publication Publication Date Title
US8000018B2 (en) Köhler concentrator
US7688525B2 (en) Hybrid primary optical component for optical concentrators
US6541694B2 (en) Nonimaging light concentrator with uniform irradiance
ES2390178T3 (es) Dispositivo para convertir la energía solar
US9236516B2 (en) Solar energy collector apparatus
US20100307586A1 (en) Reflective free-form kohler concentrator
WO1997042452A1 (fr) Nouvelle lentille liquide modulee destinee a condenser l'energie solaire
ES2880461T3 (es) Sistema optomecánico para capturar y transmitir luz incidente con una dirección de incidencia variable hacia al menos un elemento colector y correspondiente procedimiento
US20160079461A1 (en) Solar generator with focusing optics including toroidal arc lenses
ES2401755T3 (es) Colector de canaleta parabólica de foco fijo
JPWO2019112015A1 (ja) 集光ユニット、集光装置及び照射装置
ES2325939B2 (es) Concentrador optico de alta ganancia y parametros variables (copv).
ES2865377T3 (es) Elemento óptico de transmisión de luz para un ensamblaje de energía solar que comprende una parte de captación y una parte de control de alineación, y procedimiento para su alineación
Shanks et al. The design of a parabolic reflector system with high tracking tolerance for high solar concentration
ES2352714A1 (es) Dispositivo de generación de energía solar.
ES2831649T3 (es) Sistema de enfoque de bajo coste que permite altas concentraciones
ES2844699T3 (es) Concentrador solar
WO2014066957A1 (fr) Module photovoltaïque à concentration élevée
US20150101667A1 (en) Concentrator for polychromatic light
Baker et al. Practical implementation of a planar micro-optic solar concentrator
ES2542801B1 (es) Panel concentrador solar
Victoria Pérez New concepts and techniques for the development of high-efficiency concentrating photovoltaic modules
WO2009106648A1 (fr) Dispositif et module photovoltaïque à concentration
Everett et al. Enhanced longitudinal and lateral flux uniformity for linear Fresnel reflectors in concentrating photovoltaic systems
Gordon et al. Maximum-performance photovoltaic concentration with unfolded aplanatic optics

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08830203

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08830203

Country of ref document: EP

Kind code of ref document: A2