WO2005074040A2 - Photovoltaic solar generator - Google Patents

Photovoltaic solar generator Download PDF

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Publication number
WO2005074040A2
WO2005074040A2 PCT/EP2005/050358 EP2005050358W WO2005074040A2 WO 2005074040 A2 WO2005074040 A2 WO 2005074040A2 EP 2005050358 W EP2005050358 W EP 2005050358W WO 2005074040 A2 WO2005074040 A2 WO 2005074040A2
Authority
WO
WIPO (PCT)
Prior art keywords
solar
characterized
modules
arranged
generator according
Prior art date
Application number
PCT/EP2005/050358
Other languages
German (de)
French (fr)
Other versions
WO2005074040A3 (en
Inventor
Nikolaus Asteriadis
Original Assignee
Altmann, Dirk
Siegenthaler, Stephan
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
Priority to DE102004004465A priority Critical patent/DE102004004465A1/en
Priority to DE102004004465.1 priority
Application filed by Altmann, Dirk, Siegenthaler, Stephan filed Critical Altmann, Dirk
Publication of WO2005074040A2 publication Critical patent/WO2005074040A2/en
Publication of WO2005074040A3 publication Critical patent/WO2005074040A3/en

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L31/00Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/02002Arrangements for conducting electric current to or from the device in operations
    • H01L31/02005Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier
    • H01L31/02008Arrangements for conducting electric current to or from the device in operations for device characterised by at least one potential jump barrier or surface barrier for solar cells or solar cell modules
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/74Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/80Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H01L31/00Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04Semiconductor devices sensitive to infra-red radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus peculiar to the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0547Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/45Trough concentrators
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/52PV systems with concentrators

Abstract

The solar generator essentially comprises flat ribbon photovoltaic solar modules (1), arranged in front of a reflector (2) and connected at the ends thereof to a contact rail (3).

Description

 Description Photovoltaic solar generator

The invention relates to a solar generator with a plurality of elongated, arranged in the same plane solar modules with stripe-like arranged photovoltaic solar cells for converting light, especially the sun, into electrical energy, and with a reflector arrangement, the incident light between the streak-like solar cells on the Steers solar cells.

Such solar generators are known from WO 00/79593 AI. According to this publication, a solar generator consists of a multiplicity of panel-like solar modules which, on their side facing the light, carry photovoltaic solar cells arranged one behind the other in narrow strips, with reflective profiled reflectors being arranged between the solar cell strips in such a way that the light striking one roof side is incident the row of solar cells adjacent to this roof side directs, while the other side of the roof reflects the incident light in a corresponding manner to the row of solar cells adjacent to this roof side. In a top view of the solar modules, the roof profile-shaped reflectors have approximately the same width as the rows of solar cells.

[003] Photovoltaic solar generators currently used in practice consist of rectangular flat modules which are completely equipped with solar cells on their side facing the light. These modules are combined into large panels.

[004] Up to now, photovoltaic solar generators have required a disproportionately high price and installation effort due to the large number of relatively expensive solar cells required, so that photovoltaic solar generators have found little use. The high installation costs are based on on the fact that a desirable current yield can only be achieved with previous systems if the total power capacity of the solar cells is large or a very large number of solar cells is used. In addition, a great deal of effort was previously required for the electrical interconnection of the solar modules.

The object of the invention is now to significantly reduce the installation costs of solar generators.

This object is preferably achieved in that the solar modules are designed as elongated flat strip elements with photovoltaic cells arranged on both sides or with light from both sides and are arranged in front of a reflector surface, leaving strip-shaped spacing zones between adjacent flat strip elements.

The invention is based on the general idea of reflectors to also apply light to the back of flat solar modules, which is shaded from direct light. On the one hand, this increases the luminous flux supplied to a solar module. On the other hand, the luminous flux is distributed over a large surface, so that excessive heating and a concomitant decrease in the efficiency of the solar modules is avoided.

Incidentally, an undesired heating of the solar modules can also be counteracted by an essentially self-supporting arrangement of the solar modules in front of the reflector surface and the largely unimpeded air circulation possible on both sides of the solar modules.

According to a preferred embodiment of the invention, the spacing zones between the flat-band-like solar modules have at least about three times the width of the flat bands. This ensures a "loosened up" arrangement of the solar modules.

Furthermore, it can be expedient to provide the reflector surface in a wave shape with wave troughs and ridges parallel to the longitudinal axes of the flat strips, each distance zone between adjacent flat strip modules being penetrated by only one central wave crest. The reflector areas thus deflect light that strikes both sides of the wave crest to the rear sides of the two adjacent flat ribbon modules.

[01 1] A further shaft crest can be provided in the middle under each flat ribbon module, on which the respective flat ribbon module is held directly or indirectly.

[012] According to a particularly preferred embodiment, for which independent protection is claimed, it can be provided that the solar modules can be electrically connected to suitable standardized mating contacts of a contact rail with standardized contacts on the module side.

In particular, it can be provided that each contact rail can be connected or connected to a group of the flat-band-shaped solar modules and can be attached or arranged transversely to the longitudinal axes of the flat bands at one end thereof. In this way, a particularly clear modular structure is created, the flat-band-shaped solar modules on the one hand and the contact rail on the other hand being relatively easy to replace.

[014] Expediently, electrical components, such as inverters in particular, can be accommodated in a protected manner within the housing of the contact rail, so that the solar generator can be easily connected to an electrical AC network for power supply.

[015] In addition, the contact rails can have busbars which, in the case of adjoining contact rails, have a continuous electrical circuit Form a current path so that several solar generators can be connected to the AC network.

For the rest, with regard to preferred features of the invention, reference is made to the claims and the following explanation of the drawing, on the basis of which a particularly preferred embodiment of the invention is described in more detail.

Protection is not only claimed for expressly specified or shown combinations of features. Rather, the protection should in principle refer to any subcombinations of the features.

It shows

1 is a perspective view of a solar generator according to the invention,

2 shows a section II of FIGS. 1 and

3 shows a section III from FIG. 1,

4 shows a sectional view of a modified embodiment and

5 shows the cross section of a Fresnel mirror in section V of FIG. 4.

The solar generator according to the invention shown in FIGS. 1 to 3 consists essentially of flat-band-like photovoltaic solar modules 1, which are arranged largely self-supporting over a reflector 2 and are connected at one end to a contact rail 3.

The solar modules 1 have a strip-shaped upper glass pane 4 and a corresponding strip-shaped lower glass pane 5. Both glass panes are designed to be highly transparent and are tightly connected to one another with the interposition of photovoltaic solar cells 7, which can be arranged in a grid-like manner on transparent supports. If necessary, the glass panes 4 and 5 can also form a box for receiving the solar cell arrangements, which may be designed in the manner of plug-in cards, which can be inserted into electrical contact strips (not shown) which are accommodated within edge strips 6.

The reflector 2 preferably has a wave profile, the valleys and ridges of which each extend parallel to the longitudinal axes of the solar modules 1.

[027] A wave crest is preferably located centrally under one of the solar modules 1, wherein this wave crest can be provided, in particular at the ends of the solar module, with brackets (not shown) into which the respective solar module 1 can be inserted.

[028] Furthermore, the reflector 2 can each have a wave crest centrally between adjacent solar modules 1, so that light incident on the reflector 2 on both sides of the wave crest is reflected particularly effectively against the undersides of the adjacent solar modules 1.

In the example shown, the profile of the reflector 2 is parabolic on both sides of the latter wave crests. In principle, however, other profiles are also or essentially flat reflectors possible. At least in the case of stationary solar generators, the shape of the reflector 2 is of less importance, since the solar generator cannot track the position of the sun and, accordingly, the sun falls on the solar generator at constantly changing angles.

The contact rail 3 is preferably connected via standardized contacts (not shown in more detail) to correspondingly standardized mating contacts at the facing ends of the solar modules, it being expediently provided that the housing of the contact rail accommodates all electrical components, such as inverters in particular, which are necessary for the Connect the solar generator to an electrical AC network for feeding electrical energy.

[03 1] In addition, a busbar arrangement can be provided within the contact rail 3, which continues electrically into the busbar arrangement of a subsequent contact rail 3 of a solar generator adjacent to a solar generator. As a result, several solar generators can be coupled to the AC network without major installation effort.

Deviating from the embodiment shown in the drawing, the strip-like solar modules can optionally also be arranged “upright”, i.e. the glass panes 4 and 5 assume a position rotated by 90 ° with respect to the longitudinal axis of the modules 1 in relation to the position in the drawing.

[033] In addition, tubular solar modules are also conceivable.

4 shows the cross section of a further variant for the solar generator according to the invention. Here, a transparent plate 10 is arranged between the strip-shaped solar modules 1 and the reflector surface 2, which carries the reflector surface 2 on its side facing away from the solar modules 1. The reflector surface 2 is designed as a so-called Fresnel mirror, the cross section of which is shown in FIG. 5 in principle. The cross section of the reflector surface, which can be formed by a film, has a sawtooth profile such that narrow, laterally inclined reflecting strips are formed, the longitudinal axis of which is parallel to the longitudinal axis of the solar modules 1. The sideways inclination of the reflective strips can be dimensioned differently, so that a mirror is effectively formed which corresponds to the mirror surface 2 in FIG. 2.

The layer or plate 10 made of transparent material can simultaneously take on the function of a carrier for the solar modules 1. Otherwise, this layer or plate 10 can also form the support for the reflector surface 2. So if the reflector surface 2 is formed on a film, this can be glued to the facing side of the layer or plate 10.

In addition, there is the possibility of the solar modules 1 also on the outside or to cover the side facing the sun with a transparent layer or plate 12. In this way, the solar generator can be designed in the manner of a laminate.

Claims

 Claims [001] Solar generator with a plurality of elongated solar modules (1) arranged in a common plane with photovoltaic modules arranged in strips Solar cells (7) for converting light, in particular the sun, into electrical energy, and with a reflector arrangement (2) which directs incident light between the solar cells arranged in strips onto the solar cells, characterized in that the solar modules (1) are considered to be more than one Photovoltaic cells that can be exposed to light are arranged on the sides and are arranged in front of a reflector surface (2), leaving strip-shaped spacing zones between adjacent solar modules.
[002] Solar generator according to claim 1, characterized in that the solar modules (1) are designed as elongated flat band elements with a flat band plane approximately parallel to the reflector level.
  [003] Solar generator according to claim 2, characterized in that the photovoltaic cells are arranged on both sides of the ribbon elements.
[004] Solar generator according to claim 2 or 3, characterized in that the distance zones have at least approximately twice the width of the flat strips.
[005] Solar generator according to one of claims 1 to 4, characterized in that the reflector surface (2) is wave-shaped with troughs and ridges parallel to the longitudinal axes of the solar modules (1), the Distance zone is penetrated only by a central wave crest.
Solar generator according to one of claims 1 to 4, characterized in that the reflector surface (2) as a substantially flat Fresnel mirror with Longitudinal direction of the strip-shaped solar modules parallel strip-shaped Mirror section is formed.  <Desc / Clms Page number 7>  
  [007] Solar generator according to one of claims 1 to 6, characterized in that a wave crest-like elevation of the reflector (2) extends in the middle under each solar module (1), the respective solar module being held directly or indirectly on this elevation.
[008] Solar generator according to one of claims 1 to 7, characterized in that a layer or between the reflector surface and the solar modules Plate (10) made of transparent material is arranged.
[009] Solar generator with a plurality of solar modules extending in a common plane, in particular according to one of claims 1 to 8, characterized in that the solar modules (1) are electrically standardized with module-side Contacts can be connected to suitable standardized mating contacts of a contact rail (3).
[010] Solar generator according to one of claims 1 to 7, characterized in that each contact rail (3) can be connected or connected to a group of flat-ribbon-shaped solar modules (1) and transversely to the longitudinal axes of the Flat tapes can be attached or arranged at one end.
[011] Solar generator according to claim 9 or 10, characterized in that within the housing of the contact rail (3) electrical components, such as in particular inverters, are housed protected.
PCT/EP2005/050358 2004-01-28 2005-01-28 Photovoltaic solar generator WO2005074040A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102004004465A DE102004004465A1 (en) 2004-01-28 2004-01-28 Photovoltaic solar generator
DE102004004465.1 2004-01-28

Publications (2)

Publication Number Publication Date
WO2005074040A2 true WO2005074040A2 (en) 2005-08-11
WO2005074040A3 WO2005074040A3 (en) 2006-04-20

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/050358 WO2005074040A2 (en) 2004-01-28 2005-01-28 Photovoltaic solar generator

Country Status (2)

Country Link
DE (1) DE102004004465A1 (en)
WO (1) WO2005074040A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2234177A1 (en) * 2007-12-10 2010-09-29 Toyota Jidosha Kabushiki Kaisha Solar cell module
CN102136515A (en) * 2010-12-31 2011-07-27 常熟阿特斯阳光电力科技有限公司 Reflective stripe, solar assembly using same and preparation method of reflective stripe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342558A1 (en) * 1976-02-27 1977-09-23 Radiotechnique Compelec Solar photovoltaic cell with back to back transducers - has transducers occupying half surface area of reflector
WO1989005520A1 (en) * 1987-12-08 1989-06-15 Fraunhofer-Gesellschaft Zur Förderung Der Angewand Solar module
US5538563A (en) * 1995-02-03 1996-07-23 Finkl; Anthony W. Solar energy concentrator apparatus for bifacial photovoltaic cells
EP0793278A2 (en) * 1996-01-29 1997-09-03 Sanyo Electric Co. Ltd Photo-voltaic apparatus
DE20012131U1 (en) * 2000-07-13 2001-02-22 Paetz Werner solar generator
US6294723B2 (en) * 1998-02-26 2001-09-25 Hitachi, Ltd. Photovoltaic device, photovoltaic module and establishing method of photovoltaic system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342558A1 (en) * 1976-02-27 1977-09-23 Radiotechnique Compelec Solar photovoltaic cell with back to back transducers - has transducers occupying half surface area of reflector
WO1989005520A1 (en) * 1987-12-08 1989-06-15 Fraunhofer-Gesellschaft Zur Förderung Der Angewand Solar module
US5538563A (en) * 1995-02-03 1996-07-23 Finkl; Anthony W. Solar energy concentrator apparatus for bifacial photovoltaic cells
EP0793278A2 (en) * 1996-01-29 1997-09-03 Sanyo Electric Co. Ltd Photo-voltaic apparatus
US6294723B2 (en) * 1998-02-26 2001-09-25 Hitachi, Ltd. Photovoltaic device, photovoltaic module and establishing method of photovoltaic system
DE20012131U1 (en) * 2000-07-13 2001-02-22 Paetz Werner solar generator

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
EDMONDS I R: "THE PERFORMANCE OF BIFACIAL SOLAR CELLS IN STATIC SOLAR CONCENTRATORS" SOLAR ENERGY MATERIALS, ELSEVIER SCIENCE PUBLISHERS B.V. AMSTERDAM, NL, Bd. 21, Nr. 2 / 3, 1. Dezember 1990 (1990-12-01), Seiten 173-190, XP000168824 *
ORTABASI U ET AL.: "AN EVALUATION OF SOME GENERIC LOW CONCENTRATION PV MODULES UTILIZING A NOVEL BIFACIAL SOLAR CELL" PROCEEDINGS OF THE INTERNATIONAL PHOTOVOLTAIC ENERGY CONFERENCE. FLORENCE, MAY 9 - 13, 1988, DORDRECHT, KLUWER, NL, Bd. VOL. 1 CONF. 8, 9. Mai 1988 (1988-05-09), Seiten 310-314, XP000075136 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2234177A1 (en) * 2007-12-10 2010-09-29 Toyota Jidosha Kabushiki Kaisha Solar cell module
EP2234177A4 (en) * 2007-12-10 2012-12-26 Toyota Motor Co Ltd Solar cell module
JP5195764B2 (en) * 2007-12-10 2013-05-15 トヨタ自動車株式会社 Solar cell module
CN102136515A (en) * 2010-12-31 2011-07-27 常熟阿特斯阳光电力科技有限公司 Reflective stripe, solar assembly using same and preparation method of reflective stripe

Also Published As

Publication number Publication date
DE102004004465A1 (en) 2005-08-18
WO2005074040A3 (en) 2006-04-20

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