WO2001042722A1 - Electromagnetic radiation collector - Google Patents

Electromagnetic radiation collector Download PDF

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Publication number
WO2001042722A1
WO2001042722A1 PCT/ZA2000/000250 ZA0000250W WO0142722A1 WO 2001042722 A1 WO2001042722 A1 WO 2001042722A1 ZA 0000250 W ZA0000250 W ZA 0000250W WO 0142722 A1 WO0142722 A1 WO 0142722A1
Authority
WO
WIPO (PCT)
Prior art keywords
radiation
reflector
involute
circle
electromagnetic radiation
Prior art date
Application number
PCT/ZA2000/000250
Other languages
French (fr)
Inventor
Flooris Albertus Pretorius
Original Assignee
Viljoen, Catharina, Anna, Johanna
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 Viljoen, Catharina, Anna, Johanna filed Critical Viljoen, Catharina, Anna, Johanna
Priority to AU29793/01A priority Critical patent/AU2979301A/en
Publication of WO2001042722A1 publication Critical patent/WO2001042722A1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/80—Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/10—Mirrors with curved faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83—Other shapes
    • F24S2023/838—Other shapes involutes
    • 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

Definitions

  • This invention relates to an apparatus for collecting electromagnetic radiation and, more specifically, to collecting solar radiation and focusing said radiation onto a body.
  • the Edge Ray method has been used to construct compound parabolic concentrators to concentrate the sun's energy onto absorber tubes successfully but there has been little development in this field after the early 1980's with the ebbing of the oil crisis.
  • the object on the present invention is to provide an alternative design for an apparatus for collecting electromagnetic radiation such as solar radiation that is capable of concentrating the collected radiation onto a smaller body than was possible with the Edge Ray method or Geometric Vector Flux approach, thereby creating a higher energy density on said body.
  • involute is defined to be the following and is to be interpreted accordingly:-
  • involute means the curve described by the endpoint of a string as it unwinds from the circle while held taut, (page 43, “Mathematical Handbook of Formulas and Tables", M.R. Spiegel, McGraw-Hill Book Company).
  • page 43 “Mathematical Handbook of Formulas and Tables", M.R. Spiegel, McGraw-Hill Book Company”.
  • the complete “involute” of a circle is also described by the endpoint of a string that is wound around the circle from a starting point while held taut, the length of the string being equal to the circumference of the circle.
  • the term "involute” means the curve described by the endpoint of a string as it is wound around the polygon from a starting point while held taut, wherein the curve is composed of a plurality of segments of circles having different radii, every circle segment beginning when the string is parallel to a side of the polygon and therefore has to bend around an edge of the polygon to continue the winding process.
  • the "involute" of a three-dimensional body means the surface described when the above process is performed on a three dimensional body.
  • An apparatus for concentrating electromagnetic radiation onto a body capable of absorbing said radiation including:- a radiation reflector for reflecting radiation striking the radiation reflector and focusing said radiation onto the body wherein at least a part of the radiation reflector is in the shape of at least a portion of an involute of the body.
  • an apparatus for collecting electromagnetic radiation using an involute as described above depends on two principles. Firstly, should one use a semicircular radiation reflector and draw a first and a second imaginary line from the circle's centre to its circumference, then any radiation entering the semicircle via the first line is reflected by the radiation reflector and can only exit the semicircle via the second line and vice versa.
  • the above principle also applies to an involute of a body used as a radiation reflector. Accordingly, radiation entering a circle segment that forms part of the involute is reflected by the radiation reflector and can only exit said segment by either entering the adjacent circle segment or by striking the body around which the involute is formed. In this way, all radiation collected by the radiation reflector is ultimately reflected onto the body.
  • the body may be a two-dimensional or a three-dimensional body, for example, a circle, a square, a rectangle, a polygon, a sphere or a part thereof, a solid cylinder or a part thereof or a tube or a part thereof.
  • the operative surface of the reflector may be a conventional reflector surface for collecting electromagnetic radiation such as solar radiation and is typically a highly polished surface manufactured from, for example, aluminium, stainless steel or a mirror.
  • the reflectors may also be used to concentrate sound waves or particles.
  • the body may be a conventional tube used in the collection of solar radiation or energy capable of absorbing said energy and, if desired, transmitting the energy to a fluid contained within the body.
  • a body may be provided with one or more reflectors that reflect radiation onto the body, each reflector at least partially being an involute of said body.
  • the apparatus is typically used industrially or domestically to heat a fluid located interior the body, but it is to be appreciated that it may be used in a variety of different applications.
  • the body is a tube, the dimensions of which are dictated by its intended use as well as the density of radiation required for its intended use.
  • Figure 1 shows a schematic view of an embodiment of an apparatus in accordance with the present invention wherein the body is a polygon;
  • Figure 2 shows a schematic view of an embodiment of an apparatus in accordance with the present invention wherein the body is a circle
  • Figure 3 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a three-dimensional body having a square cross-section
  • Figure 4 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a tube;
  • Figure 5 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a part of a cylinder;
  • Figure 6 shows a schematic view of a cross-section of the apparatus of Figure 5 combined with a conventional Edge Ray reflector
  • Figures 7 and 8 show a schematic view of an enlarged portion of a cross-section of two different embodiments of an apparatus in accordance with the present invention combined with a conventional Edge Ray reflector and glass wedges; and Figure 9 shows yet a further schematic view of a cross-section of an embodiment of the present invention wherein the apparatus is used to heat an object.
  • reference numeral 10 generally indicates an apparatus in accordance with the present invention.
  • An apparatus for concentrating electromagnetic radiation 10 onto a body 12 capable of absorbing said radiation includes a radiation reflector 14 for reflecting radiation striking the radiation reflector 14 and focusing said radiation onto the body 12 wherein at least a part of the radiation reflector 14 is in the shape of at least a portion of an involute of the body 12.
  • Figure 1 shows how an involute of a polygon 12 is described.
  • the shape of the reflector 14 is determined by the shape of the curve described by the endpoint of a string as it is wound around the polygon 12 from a starting point G while held taut.
  • the curve is composed of a plurality of segments S1 , S2, S3, S4, S5, S6 and S7 of circles having different radii, every circle segment S1 , S2, S3, S4, S5, S6 and S7 beginning when the string is parallel to a side of the polygon 12 and therefore has to bend around an edge (for example at point E) of the polygon 12 to continue the winding process.
  • the radius of segment S1 is equal to the distance CD
  • the radius of segment S2 is equal to the distance EF
  • the radius of segment S3 is equal to the distance GA.
  • Figure 2 shows how a part of an involute of a circle 12 is described.
  • the shape of the reflector 14 is determined by the shape of the curve described by the endpoint P of a string 16 as it unwinds from the circle 12 while held taut.
  • the complete involute of circle 12 is also described by the endpoint P of a string 16 that is wound around the circle 12 from a starting point while held taut, the length of the string 16 being equal to the circumference of the circle 12.
  • Figures 3,4 and 5 show how the apparatus 10 looks when the body 12 is a three-dimensional one.
  • the operative surface of the reflector 14, i.e. the surface that is used to collect electromagnetic radiation, is typically a conventional reflector surface for collecting electromagnetic radiation such as solar radiation.
  • the operative surface of the reflector 14 is thus typically a highly polished surface manufactured from, for example, aluminium, stainless steel or a mirror.
  • the body 12 is typically a conventional tube used in the collection of solar radiation or energy capable of absorbing said energy and, if desired, transmitting the energy to a fluid contained within the body.
  • a conventional Edge Ray reflector 18 is used in combination with the apparatus 10. As shown in the drawing, the apparatus 10 is placed at the opening 20 of the Edge Ray reflector 18 defined between points R and R' so that the radiation collected by the Edge Ray reflector 18 and focused on the opening 20 is further collected and focused by the apparatus 10, so that ultimately the radiation collected by the Edge Ray reflector 18 is focused on the body 12.
  • a conventional Edge Ray reflector 18 is used in combination with two glass wedges 22 and 24 and a further embodiment of the apparatus 10.
  • the bottom surfaces 26 and 28 of the wedges 22 and 24 are typically mirrors and the wedges 22 and 24 are designed in such a way that radiation entering the wedges 22 and 24 via surfaces 30 and 32 is reflected from surfaces 26 and 28 and upon striking the interior of surfaces 30 and 32 is reflected totally so that all radiation entering the wedges 22 and 24 is collected into the apparatus 10.
  • the radiation Upon exiting the wedges 22 and 24, the radiation enters the apparatus 10 where it is reflected by radiation reflectors 14 and focused on body 12.
  • the radiation reflectors 14 are partial involutes of the body 12.
  • FIG 8 a different embodiment of the combination shown in Figure 7 is illustrated.
  • a glass wedge 33 having a mirror as a floor 34 is used in combination with an Edge Ray reflector 18 and an embodiment of the apparatus 10, so that radiation entering the Edge Ray reflector 18 which is focused on the opening of the Edge Ray reflector 18 is reflected into the apparatus 10 by the wedge 33 where it is further collected and focused on the body 12.
  • two identical radiation reflectors 14 that are partial involutes of body 12 are used to heat an object 36 wherein the cross- sectional area of the object 36 is larger than the cross-sectional area of the body 12.
  • the body 12 is a heating element and the object 36 is heated to a temperature that is close to that of the heating element or body 12.

Abstract

An apparatus for concentrating electromagnetic radiation (10) onto a body (12) capable of absorbing said radiation includes a radiation reflector (14) for reflecting radiation striking the radiation reflector (14) and focusing said radiation onto the body (12) wherein at least a part of the radiation reflector (14) is in the shape of at least a portion of an involute of the body (12).

Description

Electromagnetic Radiation Collector
Field of the Invention
This invention relates to an apparatus for collecting electromagnetic radiation and, more specifically, to collecting solar radiation and focusing said radiation onto a body.
Background to the Invention
In an article entitled "Nonimaging Optics" by Roland Winston (page 52, Scientific American, March 1991 ) two known non-imaging methods of collecting solar radiation, namely the Edge-Ray method and the Geometric Vector Flux approach, where discussed. Both the above methods do not require the reflector to follow the movement of the sun due to the shape of the reflectors which is usually in the shape of a cone or through having a focal point at the narrow end of the cone or trough where a body capable of absorbing solar radiation, for example, an absorber tube is located.
The Edge Ray method has been used to construct compound parabolic concentrators to concentrate the sun's energy onto absorber tubes successfully but there has been little development in this field after the early 1980's with the ebbing of the oil crisis.
The object on the present invention is to provide an alternative design for an apparatus for collecting electromagnetic radiation such as solar radiation that is capable of concentrating the collected radiation onto a smaller body than was possible with the Edge Ray method or Geometric Vector Flux approach, thereby creating a higher energy density on said body.
For the remainder of this specification the term "involute" is defined to be the following and is to be interpreted accordingly:- For a circle the term "involute" means the curve described by the endpoint of a string as it unwinds from the circle while held taut, (page 43, "Mathematical Handbook of Formulas and Tables", M.R. Spiegel, McGraw-Hill Book Company). Conversely, the complete "involute" of a circle is also described by the endpoint of a string that is wound around the circle from a starting point while held taut, the length of the string being equal to the circumference of the circle.
Similarly, for a polygon the term "involute" means the curve described by the endpoint of a string as it is wound around the polygon from a starting point while held taut, wherein the curve is composed of a plurality of segments of circles having different radii, every circle segment beginning when the string is parallel to a side of the polygon and therefore has to bend around an edge of the polygon to continue the winding process.
The "involute" of a three-dimensional body means the surface described when the above process is performed on a three dimensional body.
Summary of the Invention
An apparatus for concentrating electromagnetic radiation onto a body capable of absorbing said radiation including:- a radiation reflector for reflecting radiation striking the radiation reflector and focusing said radiation onto the body wherein at least a part of the radiation reflector is in the shape of at least a portion of an involute of the body.
Due to the shape of the reflector, substantially all electromagnetic radiation striking the reflector is reflected onto the body that is also the focal point of the reflector.
The operation of an apparatus for collecting electromagnetic radiation using an involute as described above depends on two principles. Firstly, should one use a semicircular radiation reflector and draw a first and a second imaginary line from the circle's centre to its circumference, then any radiation entering the semicircle via the first line is reflected by the radiation reflector and can only exit the semicircle via the second line and vice versa.
Secondly, the above principle also applies to an involute of a body used as a radiation reflector. Accordingly, radiation entering a circle segment that forms part of the involute is reflected by the radiation reflector and can only exit said segment by either entering the adjacent circle segment or by striking the body around which the involute is formed. In this way, all radiation collected by the radiation reflector is ultimately reflected onto the body.
The body may be a two-dimensional or a three-dimensional body, for example, a circle, a square, a rectangle, a polygon, a sphere or a part thereof, a solid cylinder or a part thereof or a tube or a part thereof.
The operative surface of the reflector may be a conventional reflector surface for collecting electromagnetic radiation such as solar radiation and is typically a highly polished surface manufactured from, for example, aluminium, stainless steel or a mirror. The reflectors may also be used to concentrate sound waves or particles.
The body may be a conventional tube used in the collection of solar radiation or energy capable of absorbing said energy and, if desired, transmitting the energy to a fluid contained within the body.
A body may be provided with one or more reflectors that reflect radiation onto the body, each reflector at least partially being an involute of said body.
The apparatus is typically used industrially or domestically to heat a fluid located interior the body, but it is to be appreciated that it may be used in a variety of different applications. In a preferred embodiment of the invention, the body is a tube, the dimensions of which are dictated by its intended use as well as the density of radiation required for its intended use.
Detailed Description of the Invention
The invention will now be described by the following non-limiting examples with reference to the accompanying drawings.
In the drawings:-
Figure 1 shows a schematic view of an embodiment of an apparatus in accordance with the present invention wherein the body is a polygon;
Figure 2 shows a schematic view of an embodiment of an apparatus in accordance with the present invention wherein the body is a circle; Figure 3 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a three-dimensional body having a square cross-section;
Figure 4 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a tube;
Figure 5 shows a three-dimensional view of an embodiment of an apparatus in accordance with the present invention wherein the body is a part of a cylinder;
Figure 6 shows a schematic view of a cross-section of the apparatus of Figure 5 combined with a conventional Edge Ray reflector;
Figures 7 and 8 show a schematic view of an enlarged portion of a cross-section of two different embodiments of an apparatus in accordance with the present invention combined with a conventional Edge Ray reflector and glass wedges; and Figure 9 shows yet a further schematic view of a cross-section of an embodiment of the present invention wherein the apparatus is used to heat an object.
In the drawings, reference numeral 10 generally indicates an apparatus in accordance with the present invention. An apparatus for concentrating electromagnetic radiation 10 onto a body 12 capable of absorbing said radiation includes a radiation reflector 14 for reflecting radiation striking the radiation reflector 14 and focusing said radiation onto the body 12 wherein at least a part of the radiation reflector 14 is in the shape of at least a portion of an involute of the body 12.
Due to the shape of the reflector 14, substantially all electromagnetic radiation crossing line AB in Figure 1 and striking the reflector 14 is reflected onto the body 12 that is also the focal point of the reflector 14.
Figure 1 shows how an involute of a polygon 12 is described. The shape of the reflector 14 is determined by the shape of the curve described by the endpoint of a string as it is wound around the polygon 12 from a starting point G while held taut. The curve is composed of a plurality of segments S1 , S2, S3, S4, S5, S6 and S7 of circles having different radii, every circle segment S1 , S2, S3, S4, S5, S6 and S7 beginning when the string is parallel to a side of the polygon 12 and therefore has to bend around an edge (for example at point E) of the polygon 12 to continue the winding process. Thus, the radius of segment S1 is equal to the distance CD, the radius of segment S2 is equal to the distance EF and the radius of segment S3 is equal to the distance GA.
Figure 2 shows how a part of an involute of a circle 12 is described. The shape of the reflector 14 is determined by the shape of the curve described by the endpoint P of a string 16 as it unwinds from the circle 12 while held taut. Conversely, the complete involute of circle 12 is also described by the endpoint P of a string 16 that is wound around the circle 12 from a starting point while held taut, the length of the string 16 being equal to the circumference of the circle 12.
Figures 3,4 and 5 show how the apparatus 10 looks when the body 12 is a three-dimensional one. The operative surface of the reflector 14, i.e. the surface that is used to collect electromagnetic radiation, is typically a conventional reflector surface for collecting electromagnetic radiation such as solar radiation. The operative surface of the reflector 14 is thus typically a highly polished surface manufactured from, for example, aluminium, stainless steel or a mirror.
The body 12 is typically a conventional tube used in the collection of solar radiation or energy capable of absorbing said energy and, if desired, transmitting the energy to a fluid contained within the body.
Referring now to Figure 6, a conventional Edge Ray reflector 18 is used in combination with the apparatus 10. As shown in the drawing, the apparatus 10 is placed at the opening 20 of the Edge Ray reflector 18 defined between points R and R' so that the radiation collected by the Edge Ray reflector 18 and focused on the opening 20 is further collected and focused by the apparatus 10, so that ultimately the radiation collected by the Edge Ray reflector 18 is focused on the body 12.
Referring now to Figure 7, a conventional Edge Ray reflector 18 is used in combination with two glass wedges 22 and 24 and a further embodiment of the apparatus 10. The bottom surfaces 26 and 28 of the wedges 22 and 24 are typically mirrors and the wedges 22 and 24 are designed in such a way that radiation entering the wedges 22 and 24 via surfaces 30 and 32 is reflected from surfaces 26 and 28 and upon striking the interior of surfaces 30 and 32 is reflected totally so that all radiation entering the wedges 22 and 24 is collected into the apparatus 10. Upon exiting the wedges 22 and 24, the radiation enters the apparatus 10 where it is reflected by radiation reflectors 14 and focused on body 12. The radiation reflectors 14 are partial involutes of the body 12.
Referring now to Figure 8, a different embodiment of the combination shown in Figure 7 is illustrated. Again, a glass wedge 33 having a mirror as a floor 34 is used in combination with an Edge Ray reflector 18 and an embodiment of the apparatus 10, so that radiation entering the Edge Ray reflector 18 which is focused on the opening of the Edge Ray reflector 18 is reflected into the apparatus 10 by the wedge 33 where it is further collected and focused on the body 12. Referring now to Figure 9, two identical radiation reflectors 14 that are partial involutes of body 12 are used to heat an object 36 wherein the cross- sectional area of the object 36 is larger than the cross-sectional area of the body 12.
In this embodiment the body 12 is a heating element and the object 36 is heated to a temperature that is close to that of the heating element or body 12.
It is to be appreciated, that the invention is not limited to any specific embodiment or configuration as hereinbefore generally described or illustrated.

Claims

Claims:
1. An apparatus for concentrating electromagnetic radiation onto a body capable of absorbing said radiation including:- a radiation reflector for reflecting radiation striking the radiation reflector and focusing said radiation onto the body wherein at least a part of the radiation reflector is in the shape of at least a portion of an involute of the body.
2. An apparatus as claimed in claim 1 wherein the body is a circle.
3. An apparatus as claimed in claim 1 wherein the body is a polygon.
4. An apparatus as claimed in claim 1 wherein the body is a three dimensional body.
5. An apparatus as claimed in claim 4 wherein the body is a sphere or a part thereof.
6. An apparatus as claimed in claim 4 wherein the body is a cylinder or a part thereof.
7. An apparatus as claimed in claim 4 wherein the body is a tube or a part thereof.
8. An apparatus as claimed in any one of the preceding claims wherein the apparatus is used in combination with a reflector designed according to the Edge Ray method or the Geometric Vector Flux approach.
9. An apparatus according to the invention, as hereinbefore generally described.
10. An apparatus as specifically described with reference to or as illustrated in the accompanying drawings.
11. An apparatus including any new and inventive integer or combination of integers, substantially as herein described.
PCT/ZA2000/000250 1999-12-13 2000-12-13 Electromagnetic radiation collector WO2001042722A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29793/01A AU2979301A (en) 1999-12-13 2000-12-13 Electromagnetic radiation collector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA997608 1999-12-13
ZA99/7608 1999-12-13

Publications (1)

Publication Number Publication Date
WO2001042722A1 true WO2001042722A1 (en) 2001-06-14

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004090437A1 (en) * 2003-04-09 2004-10-21 Collares Pereira, Engenharia, Unipessoal, Lda Solar collector of the cpc type
WO2007129146A1 (en) * 2006-05-05 2007-11-15 Capan Rahmi Oguz Hyperbolic solar trough field system
WO2010040957A2 (en) * 2008-10-09 2010-04-15 Cabarbaye Andre Optimal solar concentrator device and sensor comprising a plurality of such concentrator devices

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Publication number Priority date Publication date Assignee Title
US4002499A (en) * 1974-07-26 1977-01-11 The United States Of America As Represented By The United States Energy Research And Development Administration Radiant energy collector
GB2033103A (en) * 1978-09-21 1980-05-14 Unisearch Ltd Radiation concentrator or distributor
WO1991013374A1 (en) * 1990-02-22 1991-09-05 Keiko Corporation Involute reflector plate and illuminator and heat radiator each provided with involute reflector plate
US5335152A (en) * 1991-10-11 1994-08-02 Nioptics Corporation Nonimaging optical illumination system
WO1999030089A1 (en) * 1997-12-08 1999-06-17 Hwa Rang Park Evacuated solar heat tube, optical concentration system and installation method thereof
US5971551A (en) * 1995-07-07 1999-10-26 Arch Development Corporation Nonimaging optical concentrators and illuminators

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002499A (en) * 1974-07-26 1977-01-11 The United States Of America As Represented By The United States Energy Research And Development Administration Radiant energy collector
GB2033103A (en) * 1978-09-21 1980-05-14 Unisearch Ltd Radiation concentrator or distributor
WO1991013374A1 (en) * 1990-02-22 1991-09-05 Keiko Corporation Involute reflector plate and illuminator and heat radiator each provided with involute reflector plate
US5335152A (en) * 1991-10-11 1994-08-02 Nioptics Corporation Nonimaging optical illumination system
US5971551A (en) * 1995-07-07 1999-10-26 Arch Development Corporation Nonimaging optical concentrators and illuminators
WO1999030089A1 (en) * 1997-12-08 1999-06-17 Hwa Rang Park Evacuated solar heat tube, optical concentration system and installation method thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BASSETT,DERRICK: "The collection of diffuse light onto an etended absorber", OPTICAL AND QUANTUM ELECTRONICS., vol. 10, no. 1, January 1978 (1978-01-01), CHAPMAN AND HALL. LONDON., GB, pages 61 - 82, XP002163824 *
WINSTON: "Nonimaging Optics", SCIENTIFIC AMERICAN., March 1991 (1991-03-01), SCIENTIFIC AMERICAN INC. NEW YORK., US, pages 52 - 57, XP000990193, ISSN: 0036-8733 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004090437A1 (en) * 2003-04-09 2004-10-21 Collares Pereira, Engenharia, Unipessoal, Lda Solar collector of the cpc type
WO2007129146A1 (en) * 2006-05-05 2007-11-15 Capan Rahmi Oguz Hyperbolic solar trough field system
WO2010040957A2 (en) * 2008-10-09 2010-04-15 Cabarbaye Andre Optimal solar concentrator device and sensor comprising a plurality of such concentrator devices
WO2010040957A3 (en) * 2008-10-09 2010-09-02 Cabarbaye Andre Optimal solar concentrator device and sensor comprising a plurality of such concentrator devices

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