[go: up one dir, main page]

WO2001059361A1 - Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire - Google Patents

Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire Download PDF

Info

Publication number
WO2001059361A1
WO2001059361A1 PCT/CA2000/000148 CA0000148W WO0159361A1 WO 2001059361 A1 WO2001059361 A1 WO 2001059361A1 CA 0000148 W CA0000148 W CA 0000148W WO 0159361 A1 WO0159361 A1 WO 0159361A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical film
light
film
optical
input aperture
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/CA2000/000148
Other languages
English (en)
Inventor
Lorne A. Whitehead
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.)
University of British Columbia
Original Assignee
University of British Columbia
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 University of British Columbia filed Critical University of British Columbia
Priority to PCT/CA2000/000148 priority Critical patent/WO2001059361A1/fr
Publication of WO2001059361A1 publication Critical patent/WO2001059361A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S11/00—Non-electric lighting devices or systems using daylight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • F24S23/31—Arrangements for concentrating solar-rays for solar heat collectors with lenses having discontinuous faces, e.g. Fresnel lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/20—Arrangements for controlling solar heat collectors for tracking
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y02E10/47—Mountings or tracking

Definitions

  • This application pertains to an inexpensive heliostat for concentrating sunlight into a light guide for use in illuminating the interior of a building in daylight conditions.
  • the invention provides an optical system for variably redirecting light (preferably sunlight) which passes through an input aperture.
  • the input aperture is covered with a flexible optical film such as a Fresnel lens having an optical deflection characteristic which varies as a function of position so as to redirect the light in a direction which varies as a function of such position.
  • the film is supported with a selected portion of the film covering the input aperture, and with the non- selected portion of the film stored away from the input aperture.
  • a control mechanism controllably displaces the film in the aforementioned direction, to position the selected film portion relative to the input aperture.
  • the film re-directs and concentrates the light into an output aperture whose cross-sectional area is less than the cross-sectional area of the input aperture.
  • the output aperture may be a light guide's input port.
  • the film's deflection characteristic is approximately proportional to the distance, in the aforementioned direction, between the center of the film and the point.
  • the proportionality is further characterized by a constant having a selected sign and a selected magnitude, whereby substantially all of the light is focused onto the output aperture.
  • the system preferably redirects the light in a direction which is substantially perpendicular to the film.
  • first and second perpendicularly oriented flexible optical films may be used.
  • the second film also has an optical deflection characteristic which varies as a function of position so as to redirect light in a direction which varies as a function of such position.
  • the second film is supported with a selected portion of the second film covering the input aperture, and with the non-selected portion of the second film stored away from the input aperture.
  • a second control mechanism controllably displaces the second film to position the selected portion of the second film relative to the input aperture.
  • the control mechanism incorporates first and second detectors mounted centrally with respect to the input aperture.
  • the detectors are oriented to detect light which is emitted through the optical film in a preferred direction (i.e. substantially perpendicular to the film).
  • the detectors respectively produce first and second output signals representative of error between the preferred direction and the direction in which light emitted through the optical film is actually incident upon the respective detectors.
  • the error signal can then be used to controllably reposition the selected film ⁇ ortion(s) so as to reduce the error in direction.
  • the support mechanism incorporates first and second rollers.
  • the flexible optical film is mounted on the rollers so that it may be wound onto one of the rollers and simultaneously unwound from the other roller, or vice versa.
  • a first drive mechanism is coupled between the control means and the first roller; and, a second drive mechanism is coupled between the control means and the second roller.
  • An error signal like that mentioned above can be applied to the respective drive mechanisms to rotate the respective rollers and thereby reduce error in the light's preferred direction by repositioning the optical film with respect to the input aperture.
  • Figure 1 A schematically depicts the ideal operation of a prior art solar light concentration system having an input aperture upon which sunlight is incident, and an output aperture from which concentrated sunlight is emitted in a preferred direction.
  • Figures IB and 1C are identical to Figure 1A, except that the sunlight is incident upon the input aperture in different directions representative of the sun's change in position at different times of the day.
  • Figure 2A schematically depicts a prior art heliostat configured to operate as depicted in Figure 1A.
  • Figures 2B and 2C are identical to Figure 2A, except that they show the heliostat configured to operate as depicted in F gures IB and 1C respectively.
  • Figure 3 A depicts a Fresnel lens structure configured in accordance with the present invention.
  • Figures 3B and 3C are identical to Figure 3 A, except that they show the Fresnel lens structure configured to operate with sunlight which is incident upon the structure in different directions representative of the sun's change in position at different times of the day.
  • Figures 3 A, 3B and 3C each include a central, circled portion depicting the operative portion of the Fresnel lens structure on an enlarged scale.
  • Figure 4 is an enlarged, cross-sectional illustration of a portion of a prior art prismatic film Fresnel lens, and illustrates operation thereof.
  • Figure 5A depicts a Fresnel lens structure positioned in the same manner as that of Figures 3A-3C, but with a different spatial variation of optical deflection, such that the lens concentrates incident sunlight and emits same in a preferred direction into a light guide.
  • Figures 5B and 5C are identical to Figure 5 A, except that they show the Fresnel lens structure configured to operate with sunlight which is incident upon the structure in different directions representative of the sun's change in position at different times of the day.
  • Figure 7 depicts a solar-powered feedback mechanism for controllably adjusting the Fresnel lens structure of Figures 5A-5C in response to changes in direction of the sunlight incident upon the structure.
  • Figure 8 is an enlarged, cross-sectional illustration of a portion of a prismatic film Fresnel lens illustrating operation thereof in accordance with the invention.
  • FIGs 1A, IB and 1C illustrate the optical problem encountered in using a heliostat to concentrate sunlight.
  • Sunlight rays 10 are incident upon input aperture 20.
  • the heliostat and light concentrator are not shown in Figures 1A-1C, but are represented by dashed wavy lines.
  • the heliostat and light concentrator deliver concentrated sunlight through output aperture 30.
  • the heliostat compensates for the continuously changing direction of the incident sunlight by redirecting the light rays incident upon input aperture 20 such that they can subsequently be concentrated by the light concentrator such that a substantial fraction of the light energy is emitted through output aperture 30 in a preferred direction which remains substantially the same irrespective of changes in the direction of the incident sunlight. Because the cross-sectional area of output aperture 30 is smaller than that of input aperture 20, the sunlight is concentrated.
  • the emitted light rays need not necessarily be substantially parallel. Generally however there will be a maximum acceptable limit to the divergence of emitted light, such limit depending on the intended use of the emitted light.
  • FIGS 1A-1C A variety of optical structures can be used to redirect sunlight as schematically illustrated in Figures 1A-1C.
  • Figures 2A-2C show one such prior art structure.
  • Sunlight rays 40 are incident upon plane mirror heliostat 50 which reflects the light rays onto off-axis paraboloidal converging mirror 60 which in turn reflects the light rays onto confocal diverging lens 70 through which the light rays are emitted substantially parallel and concentrated relative to their original input intensity.
  • Heliostat 50 is oriented, in known fashion, by an appropriate control mechanism (not shown) to compensate for changes in direction of incident rays 40 such that the rays are always reflected from heliostat 50 onto converging mirror 60 and thence through diverging lens 70 as aforesaid.
  • Prior art systems incorporating such control mechanisms or their analogues in functionally equivalent prior art systems
  • FIGS 3A-3C depict a preferred embodiment of a Fresnel lens structure in accordance with the present invention.
  • Incident sunlight rays 80 pass through an input aperture which is covered by a flexible Fresnel lens material 90 mounted on and extending between spaced apart rollers 110, 120.
  • a flexible Fresnel lens material 90 mounted on and extending between spaced apart rollers 110, 120.
  • sunlight rays 80 are incident upon Fresnel lens material 90 in a left-right angular direction and in which most of Fresnel lens material 90 remains unused and wound upon roller 110.
  • One end of Fresnel lens material 90 is fixed to roller 120, but no portion of Fresnel lens material 90 is wound upon roller 120 as depicted in Figure 3A.
  • the selected "in use" portion of Fresnel lens material 90 extending between rollers 110, 120 is a prismatic film bearing a plurality of prisms 100 which face away from the origin of incident light rays 80. Prisms 100 refract incident light rays 80 and redirect them in a preferred substantially perpendicularly downward direction relative to Fresnel lens material 90.
  • Rollers 110, 120 are respectively controlled by drive mechanisms 130, 140 such that Fresnel lens material 90 can be unwound from roller 110 onto roller 120 or vice versa in order to cover the input aperture with different selected sections of Fresnel lens material 90.
  • drive mechanisms 130, 140 can be actuated to unwind a portion of Fresnel lens material 90 from roller 110 and to wind an equivalent length portion of Fresnel lens material 90 onto roller 120.
  • the selected "in use" Fresnel lens material 90 extending between rollers 110, 120 bears no prisms.
  • Fresnel lens material 90 as the redirected light rays shown in Figure 3 A.
  • the apparatus depicted in Figures 3A- 3C has the ability to redirect sunlight which is incident upon the apparatus in various directions and to redirect the light into a preferred direction.
  • the apparatus of Figures 3A-3C does not, by itself, concentrate the sunlight, but simply redirects the light with a fixed directionality. Accordingly,- in the desired solar daylighting application, some optical concentration mechanism such as another Fresnel lens is apparently required. This is a relatively minor problem since such concentration mechanisms are readily available, although their use would introduce an additional cost factor and an attendant loss in optical efficiency.
  • incident light rays 150 are inclined at an angle ⁇ in relative to an axis perpendicular to the flat upper surface 152 of prismatic film Fresnel lens material 160.
  • Incident rays 150 are refracted by Fresnel lens material 160, in accordance with Snell's law.
  • the prisms incorporated in Fresnel lens material 160 are characterized by angles and ⁇ , as shown.
  • the angle characterizes the angle of tilt of the "active" Fresnel lens surfaces 170 through which the refracted rays are emitted; and, the angle ⁇ characterizes the angle of tilt of the ideally inactive Fresnel lens surfaces 180.
  • angle ⁇ is selected so as to minimize the intersection of light rays with Fresnel lens surfaces 180, such that most rays are refracted by surfaces 170.
  • Fresnel lens design is just one of many possible lens designs.
  • the present invention is not restricted to use with the Figure 4 Fresnel lens structure.
  • the present invention is not- limited to the use of Fresnel lens optical films. Diffractive optics films could also be used, as could hybrid films employing refraction, diffraction, and/or reflection, in various combinations. All that is required is that the film have the desired optical deflection characteristics described herein.
  • Figures 5A-5C show how the problems noted above with respect to the apparatus of Figures 3A-3C can be solved.
  • Figure 5A is similar to Figure 3 A in that Figure 5 A shows incident sunlight rays 190 passing through an input aperture covered by a flexible Fresnel lens material 200 mounted on and extending between spaced apart rollers 240, 250.
  • the Figure 5A embodiment requires much less Fresnel lens material than the Figure 3A embodiment because, in the Figure 5A embodiment, the optical characteristic of Fresnel lens material 200 varies continuously as a function of position x along the Fresnel lens in the direction indicated by the double-headed arrow.
  • Incident sunlight rays striking other parts of the exposed portion of Fresnel lens material 200 extending between rollers 240, 250 are redirected.
  • the magnitude of such redirection is approximately proportional to the distance in position x between the point at which the incident ray strikes the exposed portion of Fresnel lens material 200 and the centre of the input aperture.
  • the net result of this variation of lens characteristic is that the redirected light rays converge substantially toward a focal region which lies a distance / below the centre of the input aperture.
  • this optical characteristic is substantially that of a converging lens having a focal length/. For small angles of redirection, this is precisely the case, and is approximately the case for larger angles of redirection.
  • Figure 5C depicts yet another case in which the incident light rays 190 travel downwardly from right to left.
  • Most of Fresnel lens material 200 has been wound onto roller 250 to expose between rollers 240, 250 that portion of Fresnel lens material 200 having an optical deflection characteristic capable of redirecting the incident light rays with the desired focusing effect at distance /from the aperture.
  • the required winding and unwinding of Fresnel lens material 200 is achieved by drive mechanisms associated with rollers 240, 250 which are in turn controlled in an appropriate manner to achieve the desired optical effect as shown.
  • Fresnel lens material shown in Figures 3A-3C, Figure 4 and Figures 5A-5C should be construed to be linear Fresnel lens material having prisms whose longitudinal axes extend perpendicular to the cross-sectional plane in question. Such prisms have essentially no optical effect relative to the direction of propagation of light rays in the direction pe ⁇ endicular to such cross-sectional plane. However, in most cases it is necessary to deal with light rays which also have a component of angular variation in such perpendicular direction.
  • an objective of the present invention is to provide a low cost mechanism for concentrating sunlight. It is accordingly desirable to avoid the expense involved in providing two systems as aforesaid.
  • Figure 6A is a cross-sectional illustration showing a plane extending east-west and inclined away from the vertical such that it points toward the sun's location at noon on the equinox, which is well known to be an angle above the horizon equal to 90° minus the local latitude.
  • the sun's motion within this plane is very large, and the optical system depicted in Figure 6A is designed to accommodate a reasonably large amount of such variation (typically up to about ⁇ 45°, representing about six hours of the sun's motion centred on noon).
  • the cross-sectional plane of Figure 6B is at right angles to that of Figure 6A, with the top of the page again representing the direction toward the equinox solar noon, as shown.
  • the cross-sectional plane of Figure 6B is vertical and the directions up, down and north, south are as shown.
  • the sun undergoes much less angular variation.
  • the angular variation within this plane is typically about +25° primarily due to the seasonal variation of the motion of the sun in the sky.
  • a passive concentrator such as that shown, namely a compound parabolic concentrator consisting of a pair of off-axis parabolic reflectors 260.
  • passive concentrator designs could also be used, employing alternate passive elements such as Fresnel lenses.
  • the significant point is that the smaller angular variation in the Figure 6B plane can be compensated for by a less expensive, lower quality concentration of sunlight in this direction.
  • Figure 7 depicts a mechanism for controlling winding and unwinding of Fresnel lens material 320 on rollers 270, 280.
  • Photo-sensitive detectors 290, 300 are placed back-to-back and centrally located within the input aperture covered by the exposed portion of Fresnel lens material 320 extending between spaced-apart rollers 270, 280.
  • Detectors 290, 300 produce electrical output signals representative of the intensity of the light incident upon the respective detectors. The output signals are input to controller 310.
  • Fresnel lens material 320 is displaced in the "wrong" position, then light rays emitted through the central portion of the exposed Fresnel lens material 320 toward detectors 290, 300 will not travel in the preferred downward direction as previously described, but will travel to the left if the displacement error is in one direction, or to the right, if the displacement error is in the opposite direction.
  • controller 310 can determine the direction of the displacement error and produce appropriate error correction signals for feedback to rollers 270, 280 causing them to rotate as required to expose a different section of Fresnel lens material 320 and thereby reduce the error.
  • detectors 290 and 300 are photovoltaic cells which each transmit current in opposite directions to a DC motor coupled to the respective drive rollers 270, 280 then controller 310 is not even required.
  • Figure 8 again depicts a Fresnel lens structure as one example structure for the optical film used in this invention.
  • ⁇ in represents the extent to which the input light deviates from the direction perpendicular to the flat input surface 402
  • ⁇ out similarly represents the extent to which the output light deviates from the perpendicular direction to surface 402.
  • ⁇ out would be equal to - ⁇ in if there were no optical deflection of the light, as would be the case in this example if the prism angle were 0.
  • ⁇ out can be calculated for any given value of ⁇ in , , and n, (the refractive index of the material 400 comprising the lens).
  • g is some function, such as for example that shown in equation (1).
  • Positions on the optical film are measured with the variable x representing the distance from the optical center of the optical film (including the film portions on the rollers, measured longitudinally along the film as though it were unrolled and laid flat). Positions on the aperture will be represented with a variable a representing the distance from the center of the aperture. If we use the variable D to represent the amount of displacement of the optical center of the film from the center of the aperture, then these variables are related by:
  • the concentrated sunlight could be directed onto photo-voltaic cells.
  • this invention could be used to receive divergent light through a small aperture, and to produce a fairly collimated output light beam having a direction determined by the location of the optical film. Such systems, used in these and other applications, are construed to fall within the teachings presented herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un système optique destiné à réorienter de manière variable de la lumière (10, 80, 150, 190) (de préférence de la lumière solaire) passant au travers d'une ouverture d'entrée. Cette ouverture d'entrée (20) est recouverte d'une pellicule optique flexible (90, 200, 320) telle qu'une lentille de Fresnel ayant une caractéristique de déflexion optique variant en fonction de la position de manière à réorienter la lumière dans une direction variant en fonction de ladite position. Une partie choisie de la pellicule recouvre l'ouverture d'entrée, et l'autre partie de la pellicule est éloignée de l'ouverture d'entrée. Un mécanisme de commande déplace de manière commandée la pellicule dans la direction citée plus haut, afin de disposer le partie choisie de la pellicule par rapport à l'ouverture d'entrée. La pellicule réoriente et concentre la lumière dans une ouverture d'entrée (30, 220) dont la section transversale est inférieure à celle de l'ouverture d'entrée. L'ouverture de sortie peut être le port d'entrée d'un guide d'onde. Sur chaque point de la partie choisie de la pellicule, la caractéristique de déflexion de la pellicule est environ proportionnelle à la distance, dans la direction citée plus haut, entre le centre de la pellicule et le point. La proportionnalité est par ailleurs caractérisée par une constante ayant un signe et une magnitude choisis, quasiment toute la lumière étant focalisée vers l'ouverture de sortie. Le système réoriente de préférence la lumière dans une direction essentiellement perpendiculaire à la pellicule.
PCT/CA2000/000148 2000-02-14 2000-02-14 Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire Ceased WO2001059361A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CA2000/000148 WO2001059361A1 (fr) 2000-02-14 2000-02-14 Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CA2000/000148 WO2001059361A1 (fr) 2000-02-14 2000-02-14 Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire

Publications (1)

Publication Number Publication Date
WO2001059361A1 true WO2001059361A1 (fr) 2001-08-16

Family

ID=4143042

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2000/000148 Ceased WO2001059361A1 (fr) 2000-02-14 2000-02-14 Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire

Country Status (1)

Country Link
WO (1) WO2001059361A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1031544C2 (nl) * 2006-04-07 2007-10-09 Suncycle B V Inrichting voor het omzetten van zonne-energie.
GB2476657A (en) * 2009-12-30 2011-07-06 Luke Anthony William Robinson Solar energy collection apparatus
GB2586062A (en) * 2019-08-01 2021-02-03 Larkfleet Ltd Solar heating system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2029883A (en) * 1978-08-31 1980-03-26 Ente Naz Energia Elettrica Apparatus for utilizing solar energy for the purpose of illuminating enclosed spaces not accessible to sunlight
CH630716A5 (en) * 1978-05-03 1982-06-30 Arthur Thyl Steinemann Device for utilising the radiation energy of the sun
JPS61180217A (ja) * 1985-02-05 1986-08-12 Kunishiro Kanagata Kogyo Kk 太陽追尾装置
US4723826A (en) * 1984-08-29 1988-02-09 Whitaker Ranald O Lens type solar collector requiring no orientation system
US4765726A (en) * 1986-05-28 1988-08-23 Johnson Kenneth C Fresnel scroll solar tracking device
EP0685681A2 (fr) * 1994-05-31 1995-12-06 SANYO ELECTRIC Co., Ltd. Dispositif d'éclairage par lumière solaire et unité de commande d'un tel dispositif

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH630716A5 (en) * 1978-05-03 1982-06-30 Arthur Thyl Steinemann Device for utilising the radiation energy of the sun
GB2029883A (en) * 1978-08-31 1980-03-26 Ente Naz Energia Elettrica Apparatus for utilizing solar energy for the purpose of illuminating enclosed spaces not accessible to sunlight
US4723826A (en) * 1984-08-29 1988-02-09 Whitaker Ranald O Lens type solar collector requiring no orientation system
JPS61180217A (ja) * 1985-02-05 1986-08-12 Kunishiro Kanagata Kogyo Kk 太陽追尾装置
US4765726A (en) * 1986-05-28 1988-08-23 Johnson Kenneth C Fresnel scroll solar tracking device
EP0685681A2 (fr) * 1994-05-31 1995-12-06 SANYO ELECTRIC Co., Ltd. Dispositif d'éclairage par lumière solaire et unité de commande d'un tel dispositif

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 011, no. 002 (P - 532) 6 January 1987 (1987-01-06) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1031544C2 (nl) * 2006-04-07 2007-10-09 Suncycle B V Inrichting voor het omzetten van zonne-energie.
WO2007117136A1 (fr) * 2006-04-07 2007-10-18 Suncycle International Gmbh dispositif de conversion de l'énergie solaire
JP2009533841A (ja) * 2006-04-07 2009-09-17 サンサイクル・インターナショナル・ゲーエムベーハー 太陽エネルギーを変換するための装置
AU2007235726B2 (en) * 2006-04-07 2011-10-06 Suncycle International Gmbh Device for converting solar energy
EP2416085A1 (fr) * 2006-04-07 2012-02-08 Suncycle B.V. Dispositif de conversion de l' energie solaire
US8944047B2 (en) 2006-04-07 2015-02-03 Suncycle International Gmbh Device for converting solar energy
GB2476657A (en) * 2009-12-30 2011-07-06 Luke Anthony William Robinson Solar energy collection apparatus
GB2586062A (en) * 2019-08-01 2021-02-03 Larkfleet Ltd Solar heating system
GB2586062B (en) * 2019-08-01 2023-11-01 Solar Steam Ltd Solar heating system

Similar Documents

Publication Publication Date Title
US6025583A (en) Concentrating heliostat for solar lighting applications
US4316448A (en) Solar energy concentrator system
US9274266B2 (en) System and method for solar energy capture and related method of manufacturing
Edmonds et al. Daylighting enhancement with light pipes coupled to laser-cut light-deflecting panels
KR101840497B1 (ko) 집중식 일광 수집기
US8450603B2 (en) Solar cell concentrator
US20080271784A1 (en) Electro-optic prism systems
JP4574917B2 (ja) 光学装置
US20100175685A1 (en) Advanced Tracking Concentrator Employing Rotating Input Arrangement and Method
US20140261622A1 (en) Sun-tracking photovoltaic solar concentrator panel
US20120255540A1 (en) Sun tracking solar concentrator
US10345563B2 (en) Sunlight collection system with asymmetric catadioptric optics
US20140261621A1 (en) Window solar harvesting means
AU2009271018A1 (en) Tracking concentrator employing inverted off-axis optics and method
US4765726A (en) Fresnel scroll solar tracking device
US20150009568A1 (en) Light collection system and method
US20140334007A1 (en) Optical Element Stacks for the Direction of Light
US8223433B2 (en) Stationary sunlight redirecting element and system
EP4026173B1 (fr) Système de collecte solaire photovoltaïque et appareil d'éclairage naturel permettant l'intégration dans des bâtiments
US10304983B2 (en) Sunlight collection system with lightguide having solid and fluid components
US9985156B2 (en) Optical concentrator/diffuser using graded index waveguide
WO2001059361A1 (fr) Heliostat de concentration destine a des applications faisant intervenir de la lumiere solaire
RU2121632C1 (ru) Устройство, концентрирующее солнечное излучение
KR20240063868A (ko) 태양광 기반 전력 생성을 위한 디바이스 및 방법
GB2476657A (en) Solar energy collection apparatus

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): IL

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase