WO2024079731A1 - Dispositif de concentration de guide de lumière - Google Patents

Dispositif de concentration de guide de lumière Download PDF

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Publication number
WO2024079731A1
WO2024079731A1 PCT/IL2023/051068 IL2023051068W WO2024079731A1 WO 2024079731 A1 WO2024079731 A1 WO 2024079731A1 IL 2023051068 W IL2023051068 W IL 2023051068W WO 2024079731 A1 WO2024079731 A1 WO 2024079731A1
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WO
WIPO (PCT)
Prior art keywords
light
solar
cladding
concentrating
receiving portion
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/IL2023/051068
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English (en)
Inventor
Reuven SHKALIM
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.)
RPR Energy Ltd
Original Assignee
RPR Energy Ltd
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 RPR Energy Ltd filed Critical RPR Energy Ltd
Priority to EP23876908.7A priority Critical patent/EP4602654A1/fr
Publication of WO2024079731A1 publication Critical patent/WO2024079731A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H10F77/484—Refractive light-concentrating means, e.g. lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts with metal rings which bite into the wall of the pipe
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20—Optical components
    • H02S40/22—Light-reflecting or light-concentrating means
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H10F77/488—Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F77/00—Constructional details of devices covered by this subclass
    • H10F77/40—Optical elements or arrangements
    • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
    • H10F77/492—Spectrum-splitting means, e.g. dichroic mirrors
    • 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
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention is directed towards the field of concentrator photovoltaics, more specifically, improved arrangements for capturing light and transmitting it efficiently to solar modules and photovoltaic cells.
  • Concentrator photovoltaics CPV
  • concentration photovoltaics CPV
  • MJ multi-junction
  • a major aim of concentrator voltaic technology is to provide high efficiency transfer of light to solar modules or photovoltaic cells in order to develop efficient solar cell modules to make them competitive over conventional power generating means.
  • the following are examples of recent developments in the field. US6730840B2, Concentrating photovoltaic module and concentrating photovoltaic power generating system (CANON KABUSHIKI KAISHA).
  • a concentrating photovoltaic module comprising: a lightguide member having at least one exit face and a plurality of entrance faces; and at least one solar cell placed immediately after the exit face of the lightguide member; wherein the lightguide member is comprised of a light transmissive, solid medium having no refractive-index-discontinuity portion and a surface of the lightguide member is smooth and wherein the lightguide member makes sunbeams incident on the plurality of entrance faces, totally reflected on side faces, and emergent from the exit face, whereby the sunbeams can be concentrated on the solar cell with high efficiency.
  • US10788180B2 discloses: An optical device and systems using an optical device are provided, where the optical device may be configured for collimating incoming light rays.
  • the optical device may include a host medium substantially comprised of a transparent material and an array of substantially transparent structures embedded within the host medium.
  • the structures of the array each include a convex side presented to the incoming light rays and a concave side that passes light rays through toward the output face of the host medium, collimating the rays.
  • Multiple stages of arrays may be provided in the optical device, typically with lengthening aspect ratios and increasing indexes of refraction in a direction from the input face toward the output face.
  • the systems may use the optical device for using an exterior light to illuminate an interior space in a building or to generate power.
  • US6541694B2 discloses: A non-imaging light concentrator system including a primary collector of light, an optical mixer disposed near the focal zone for collecting light from the primary collector, the optical mixer having a transparent entrance aperture, an internally reflective housing for substantially total internal reflection of light, a transparent exit aperture and an array of photovoltaic cells disposed near the transparent exit aperture. It remains therefore a long felt and unmet need to improve the efficiency of light concentrators to delivery light energy to solar modules or photovoltaic cells as a useful alternative to conventional means for generating electricity.
  • SUMMARY An object of the present invention is to provide a light concentrating device for transmitting concentrated light to solar modules or photovoltaic cells comprising a. a light receiving portion paved with light concentrating lenses; b.
  • each of said pipes of said nested array has a hollow cladding accommodating a gas medium therewithin said cladding has a highly reflective coating thereon; at least one of the light- concentrating lenses comprising an optical element having convex and plane-refracting surfaces.
  • the convex refracting surface has an optical axis.
  • the optical element is configured for focusing solar light, which is incident onto the convex surface, onto the plane-refracting surface.
  • a normal of the plane refracting surface is tilted to the optical axis of the convex surface such that the focused solar light when refracted outward by the plane refracting surface is spectrally split into a stretched light pattern, which falls on an array of photovoltaic cells having photosensitivity of a locally incident portion of the stretched light pattern.
  • a further object of the present invention is to provide the gas medium which is air.
  • a further object of the present invention is to provide the cladding comprising a highly reflective coating of aluminum.
  • Figs 1-7 are schematic diagrams of embodiments of the present invention.
  • DETAILED DESCRIPTION OF THE PRESENT INVENTION Photovoltaic Modules A solar PV module or solar module consists of many PV cells wired in parallel to increase current and in series to produce a higher voltage.
  • the module is often encapsulated with tempered glass (or some other transparent material) on the front surface, and with a protective and waterproof material on the back surface. The edges are sealed for weatherproofing, and there is often an aluminum frame holding everything together in a mountable unit. In the back of the module there is a junction box, or wire leads, providing electrical connections.
  • a solar cell panel, solar electric panel, photo-voltaic (PV) module or solar panel is an assembly of photovoltaic cells mounted in a framework for generating energy. Solar panels use sunlight as a source of energy to generate direct current electricity.
  • a collection of PV modules is called a PV panel, and a system of PV panels is called an array. Arrays of a photovoltaic system supply solar electricity to electrical equipment.
  • the refractive index is a way of measuring the speed of light in a material. Light travels fastest in a vacuum, such as in outer space. The speed of light in a vacuum is about 300,000 kilometers (186,000 miles) per second. The refractive index of a medium is calculated by dividing the speed of light in a vacuum by the speed of light in that medium. The refractive index of a vacuum is therefore 1. Total internal reflection When light traveling in an optically dense medium hits a boundary at a steep angle (larger than the critical angle for the boundary), the light is completely reflected. This is called total internal reflection. This effect is used in optical fibers to confine light in the core.
  • optical fiber is weakly guiding, meaning that the difference in refractive index between the core and the cladding is very small (typically less than 1%).Light travels through the fiber core, bouncing back and forth off the boundary between the core and cladding. Because the light must strike the boundary with an angle greater than the critical angle, only light that enters the fiber within a certain range of angles can travel down the fiber without leaking out. This range of angles is called the acceptance cone of the fiber. There is a maximum angle from the fiber axis at which light may enter the fiber so that it will propagate, or travel, in the core of the fiber. The sine of this maximum angle is the numerical aperture (NA) of the fiber.
  • NA numerical aperture
  • Fiber with a larger NA requires less precision to splice and work with than fiber with a smaller NA.
  • the size of this acceptance cone is a function of the refractive index difference between the fiber's core and cladding.
  • Single-mode fiber has a small NA.
  • a conventional concentrating photovoltaic (CPV) module comprises three main units, (i) the light receiving unit, which is usually an arrangement of lenses for receiving light, (ii) an output unit (iii) an arrangement of waveguides (optical fibres), for transferring received light to the solar cell.
  • Attenuation is defined as the ratio of optical power output (Pout) from a fiber of length ‘L’ to the power output (Pin) Since attenuation plays a major role in determining the transmission distance, the following attenuation mechanisms are to be considered in designing an optical fiber.
  • Light Scattering is also a wavelength dependent loss, which occurs inside the fibers.
  • glass comprises the fibre core and the disordered structure of glass will make some variations in the refractive index inside the fiber.
  • This type of scattering is called Raleigh scattering.
  • Radiative loss occurs in fibers due to bending of finite radius of curvature in optical fibers. The types of bends are a.
  • Macroscopic bends and b. Microscopic bends. Macroscopic bends If the radius of the core is large compared to fiber diameter, it may cause large-curvature at the position where the fiber cable turns at the corner. At these corners, the light will not satisfy the condition for total internal reflection and hence it escapes out from the fiber causing losses. Microscopic bends Micro-bends losses are caused due to non-uniformities or micro bends inside the fiber and are due to non-uniform pressures created during the cabling of the fiber or even during the manufacturing itself. This lead to loss of light by leakage through the fiber. The present invention provides a solution to the light losses incurred in the waveguide described above.
  • the core of the present invention are embodiments providing a light concentrating device for transmitting concentrated light to solar cells and solar cell modules.
  • the device comprises a light receiving portion paved with light concentrating lenses, an outlet portion for transmitting concentrated light to said photovoltaic cells and a nested array of total internally reflecting optical wave guides interposed between said light receiving portion and said outlet portion for propagating said received light between said receiving portion and said outlet portion .
  • the nested array of optical wave guides has high refractive index hollow cores and low refractive index cladding.
  • Each guide is a light transmitting pipe with a light receiving section connecting by a substantially 90 degree bend for receiving incident light with a longitudinal pipe section culminating in a light outlet end.
  • Fig.1 is a diagram of conventional prior art optical fibre waveguide 10 constituting a cylindrical dielectric waveguide (nonconducting waveguide) that transmits light along its axis through the process of total internal reflection.
  • Fiber 10 consists of a core 15 surrounded by cladding layer 13, both of which are made of dielectric nonconducting materials.
  • the refractive index of the core must be greater than that of the cladding 13.
  • Core may be glass or silica, and cladding 13 may be glass of a lower refractive index. Because the light must strike the boundary of core 15 and cladding 13 with an angle greater than the critical angle, only light that enters the fiber within a certain range of angles can travel down fiber 10 without leaking out.
  • Fig.2a shows (i) the light losses by attenuation through a conventional light guide with a conventional core.
  • Fig.2b shows the light losses by attenuation through a conventional light guide with a gaseous air core of an atmospheric composition measured from ground level referring to about 100km of air compared to 10-meter need to operate our system.
  • Figs 3a and 3b show general and sectional views of individual longitudinal waveguide, which is embodied as a total internally reflecting optical longitudinal aluminum cladding tube, filled with a gas.
  • Light receiving end 21 and light outlet end 25 of waveguide 20 are bent in an approximate 90 degree angle relative to middle portion 23 for receiving incident solar light and directing the solar light to a PV cell (not shown).
  • the cladding pipe is 0.2mm diameter, and the 90 degree bends have a radius of 0.2mm.
  • resultant transmittance of the optical path in the embodiment of the present invention is proportional to the area under the resultant transmittance graph defined by a compound of atmosphere transmittance and optical fibre transmittance.
  • Figs 4a-c show aspects of the device of the present invention.
  • numeral 410 refers to an upper surface paved with planoconvex lenses 4/4/0.5 mm.
  • Fig.4b A further aspect of the device is illustrated in Fig.4b.
  • the light receiving surface connected to the upper part of the waveguide array 420 with the waveguide array connected to the light output 430 (Fig.4c) which conducts the concentrated received light to the PV cell (not shown).
  • Fig.5 is an isometric upper cutaway view of an embodiment of the light concentrating device of the present invention.
  • Arrangement 30 is one of several possibilities contemplated in the present invention.
  • the upper light receiving end 21 of the device is paved with concentrator lenses 27, which are arranged in a nested concentric manner, connected to correspondingly nested waveguides.
  • Light received at the aforementioned upper surface light receiving end 21 of the device propagates through the gas core (passage) within cladding pipe 23 exiting at light outlet end 25 and on to the photovoltaic cell 29 to be illuminated.
  • efficiency of the use of space and area is optimized, thereby optimizing the quantity of light reaching the solar cell or solar module.
  • Fig .7 illustrates light concentrating device 100.
  • Solar light 110 propagates via input optical element 120 is incident onto concave surface 133 of concave-plane optical element 130.
  • the solar light is concentrated on plane surface 135 by refraction on concave surface 133.
  • Normal 139 to plane surface 135 is tilted to optical axis 139 of concave surface 133 at angle ⁇ .
  • the focused solar light when refracted outward by plane refracting surface 135 is spectrally split into a stretched light pattern comprising a number of quasi-monochromatic portions 140- 1, 140-2, 140-3 and 140-4.
  • An array of concentrating lenses 150-1, 150-2, 150-3 and 150-4 is configured for directing quasi-monochromatic portions of the stretched light pattern into pipes 160-1, 160-2, 160-3 and 160-4 in a separate manner.
  • Numeral 170 refers to an array of photovoltaic cells having different spectral sensitivity.
  • Pipes 160-1, 160-2, 160-3 and 160-4 are configured for translating said quasi-monochromatic portions responsive to photosensitivity of said photovoltaic cells.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un dispositif de concentration de lumière pour transmettre une lumière concentrée à des modules solaires comprenant : (a) une partie de réception de lumière pavée avec des lentilles de concentration de lumière ; (b) une partie de sortie pour transmettre la lumière concentrée aux modules solaires ; (c) un réseau imbriqué de guides d'ondes optiques à réflexion interne totale interposés entre la partie de réception de lumière et la partie de sortie pour propager la lumière reçue entre la partie de réception et la partie de sortie. Chacun des tuyaux du réseau imbriqué a une gaine creuse recevant un milieu gazeux à l'intérieur de celle-ci. La gaine comporte un revêtement hautement réfléchissant sur celle-ci. Les lentilles de concentration de lumière comprennent un élément optique ayant des surfaces convexes et de réfraction plane. La surface de réfraction plane est inclinée vers un axe optique de la surface convexe de telle sorte que la lumière solaire est divisée spectralement en un motif lumineux étiré, qui tombe sur un réseau de cellules photovoltaïques ayant une photosensibilité d'une partie localement incidente du motif lumineux étiré.
PCT/IL2023/051068 2022-10-13 2023-10-10 Dispositif de concentration de guide de lumière Ceased WO2024079731A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP23876908.7A EP4602654A1 (fr) 2022-10-13 2023-10-10 Dispositif de concentration de guide de lumière

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IL297320A IL297320B2 (en) 2022-10-13 2022-10-13 Light concentrating devices and waveguides for conducting concentrated light to solar modules, means and methods therefor
IL297320 2022-10-13

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WO2024079731A1 true WO2024079731A1 (fr) 2024-04-18

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IL (1) IL297320B2 (fr)
WO (1) WO2024079731A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101699748A (zh) * 2009-11-09 2010-04-28 刘文祥 纳米光伏
WO2019215549A1 (fr) * 2018-05-07 2019-11-14 Ali Asiri Générateur solaire

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19735281A1 (de) * 1997-08-14 1999-02-18 Rolf Hoericht Einrichtung zur Erzeugung von Energie
JP2002289900A (ja) * 2001-03-23 2002-10-04 Canon Inc 集光型太陽電池モジュール及び集光型太陽光発電システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101699748A (zh) * 2009-11-09 2010-04-28 刘文祥 纳米光伏
WO2019215549A1 (fr) * 2018-05-07 2019-11-14 Ali Asiri Générateur solaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
R. H. INMAN: "Cylindrical luminescent solar concentrators with near-infrared quantum dots", OPTICS EXPRESS, OPTICAL SOCIETY OF AMERICA, US, vol. 19, no. 24, 21 November 2011 (2011-11-21), US, pages 24308, XP093159486, ISSN: 1094-4087, DOI: 10.1364/OE.19.024308 *

Also Published As

Publication number Publication date
EP4602654A1 (fr) 2025-08-20
IL297320B2 (en) 2025-04-01
IL297320A (en) 2024-05-01
IL297320B1 (en) 2024-12-01

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