WO2011151030A2 - Réflecteur de lumière solaire pour une centrale solaire - Google Patents

Réflecteur de lumière solaire pour une centrale solaire Download PDF

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Publication number
WO2011151030A2
WO2011151030A2 PCT/EP2011/002574 EP2011002574W WO2011151030A2 WO 2011151030 A2 WO2011151030 A2 WO 2011151030A2 EP 2011002574 W EP2011002574 W EP 2011002574W WO 2011151030 A2 WO2011151030 A2 WO 2011151030A2
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WO
WIPO (PCT)
Prior art keywords
layer
sunlight reflector
core element
less
core
Prior art date
Application number
PCT/EP2011/002574
Other languages
German (de)
English (en)
Other versions
WO2011151030A3 (fr
Inventor
Michael Ludwig NIEDERFÜHR
Markus Spieler
Original Assignee
3A Technology & Management 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 3A Technology & Management Ltd. filed Critical 3A Technology & Management Ltd.
Publication of WO2011151030A2 publication Critical patent/WO2011151030A2/fr
Publication of WO2011151030A3 publication Critical patent/WO2011151030A3/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/0015—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid warp or curl
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/18—Layered products comprising a layer of metal comprising iron or steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/066—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B37/1018—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using only vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
    • 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
    • F24S23/77—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with flat reflective plates
    • 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
    • F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S30/00—Arrangements for moving or orienting solar heat collector modules
    • F24S30/40—Arrangements for moving or orienting solar heat collector modules for rotary movement
    • F24S30/45—Arrangements for moving or orienting solar heat collector modules for rotary movement with two rotation axes
    • F24S30/452—Vertical primary axis
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0221—Vinyl resin
    • B32B2266/0235—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/0264—Polyester
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/04—Inorganic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00—Composition of foam
    • B32B2266/08—Closed cell foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/024—Honeycomb
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/08—Dimensions, e.g. volume
    • B32B2309/10—Dimensions, e.g. volume linear, e.g. length, distance, width
    • B32B2309/105—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2315/00—Other materials containing non-metallic inorganic compounds not provided for in groups B32B2311/00 - B32B2313/04
    • B32B2315/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2551/00—Optical elements
    • B32B2551/08—Mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/04—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the partial melting of at least one layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/146—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers whereby one or more of the layers is a honeycomb structure
    • 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

  • the invention relates to a large-area sunlight reflector for a solar power plant, with a surface extension of at least 1 m 2 , and with a composite structure comprising a glass element comprehensive mirror element, a core element and a rear cover element.
  • the known sunlight reflector comprises a carrier sandwich structure with a core element, which is sandwiched between two cover elements.
  • This three-layer carrier composite structure carries a mirror on a front side.
  • the core is a hard foam layer and the two cover elements, for example steel plates. Alternatively, these cover elements can also be made of PVC, PET or PU.
  • the mirror is supported by the sandwich structure.
  • a disadvantage of the known sunlight reflector is that it comprises at least four (solid) elements, namely the core, the two cover elements and the mirror. In addition, it can come in Sonnenein- radiation to a delay of the sunlight reflector.
  • sunlight reflectors which consist of a vapor-deposited with a reflective layer, thick glass plate.
  • Such sunlight reflectors require circumferential frames or supporting frameworks, usually designed as a truss structure, for supporting the thick glass.
  • CONFIRMATION COPY For example, Kafttechnike, which use the solar energy, operated by a plurality of heliostats or parabolic troughs.
  • the heliostats or parabolic troughs can be constructed, for example, from one or more sunlight reflectors.
  • the present invention seeks to provide a novel self-supporting sunlight reflector, with a small number of surface elements, preferably with less than four surface elements for a heliostat or preferably with less than eight surface elements for a parabolic trough, manages.
  • the sunlight reflector should be as low-distortion as possible when exposed to heat.
  • This object is achieved in a generic sunlight reflector in that the mirror element is set directly on a Anschmelz slaughter the core element or a primer layer on the core element.
  • an element according to the invention such as the mirror element, the cover element and the core element are understood prefabricated solid surface elements, which are combined to form the composite structure. Possibly.
  • Elements can be designed as prefabricated units of several elements.
  • the elements forming an element are layers.
  • a location is characterized by a Minimum thickness of 0.5 mm, preferably of at least 0.6 mm, even more preferably of at least 0.7 mm, most preferably of at least 0.8 mm.
  • an element is preferably a solid surface component with a minimum thickness from the aforementioned value range.
  • the mirror element is preferably a structure comprising a glass element, ie in this case a glass layer, and a reflective layer or mirror layer of, for example, silver, which is produced, for example, by vapor deposition or by means of a wet-chemical method, arranged on the back side of the glass layer ,
  • a glass element ie in this case a glass layer
  • a reflective layer or mirror layer of, for example, silver which is produced, for example, by vapor deposition or by means of a wet-chemical method, arranged on the back side of the glass layer
  • the layers used is initially fluid, pasty, vaporous or as (spray) mist present material, which in the finished verb and structure substantially no supporting function, but for example, a visual, a connecting, ie adhesive function and / or a protective function such as a UV and / or corrosion protection function belongs.
  • the at least one adhesion promoter layer can also be an adhesive film, preferably adhesive on both sides.
  • the thickness extension of the above-mentioned layers used is preferably less than 0.5 mm, even more preferably less than 0.4 mm, very particularly preferably less than 0.3 mm. More preferably less than 0.2 mm or less than 0.1 mm.
  • the fuser layer is a layer formed by fusing the core element.
  • At least one of the adhesion promoter layers used in the composite structure may comprise adhesives, such as one or more component reactive adhesives, epoxy resins, polyaddition or polymerization adhesives, such as cyanoacrylates, methacrylates, aminoplasts, phenolic resins, polycondensation adhesives, hot melt adhesives, pressure-sensitive adhesives , Contact adhesives, silicone-containing adhesives, urethane-containing adhesives, acrylates, etc. It can also be used adhesive sheets, mutatis mutandis, such as the aforementioned z. As liquid, pasty or powdery adhesives can be applied. The adhesive can advantageously cover this at the edges of the layers or encompass and z. B.
  • adhesives such as one or more component reactive adhesives, epoxy resins, polyaddition or polymerization adhesives, such as cyanoacrylates, methacrylates, aminoplasts, phenolic resins, polycondensation adhesives, hot melt adhesives, pressure-sensitive adhesives , Contact adhesives, silicone-containing adhesive
  • the invention is based on the idea to provide a large-area, self-supporting sunlight reflector with the smallest possible surface element number, that the mirror element forms part of the support structure, which is inventively achieved in that the mirror element is disposed immediately adjacent to the core element, either by the mirror element rests directly on or is secured by an amalgam layer of the core element produced by melting of the core element or by fixing the mirror element to the core element via a bonding agent layer separate from the core element.
  • the mirror element is part of the, preferably three-element, support structure.
  • elements (carrying) arranged between the mirror element and the core element ie, solid and / or structural surface elements
  • at least one, preferably exclusively one, cover element is arranged on the side of the core element facing away from the mirror element, which can be multi-layered, but preferably single-layered.
  • the cover element is defined in a further development of the invention analogous to the mirror element either via an enamel layer of the core element formed by melting of the core element or via a (thin) adhesive layer on the core element.
  • the surface extension of the trained according to the concept of the invention sunlight reflector is substantially greater than 1 m 2 , it is preferably at least 2 m 2 , preferably at least 3 m 2 , more preferably at least 4 m 2 , even more preferably at least 5 m 2 , more preferably at least 6 m 2 , even more preferably at least 7 m 2 , most preferably at least 8 m 2 .
  • the surface extension is about 8-12 m 2 , in particular about 10 m 2 .
  • the length of a side edge preferably in a plan view at least approximately rectangular sunlight reflector at least 1 m, preferably at least 2m and for example in length 1, 6 - 2.5 m and in width 1, 6 - 3.5 m.
  • the sunlight reflector may be planar, but is preferably, preferably light, concave or, preferably, parabolically curved, or 1-axis or 2-axis curved to concentrate the sunlight to a particular location at which the sunlight is collected and for example, converted into electrical energy.
  • the cover element preferably has a coefficient of thermal expansion which corresponds to the coefficient of thermal expansion of the mirror element, or at least approximately corresponds to, under "at least approximately" a deviation of not more than 30%, preferably of not more than 20%, more preferably of not more than 10%, even more preferably of not more than 5%.
  • a thickest layer of the cover element may have a coefficient of thermal expansion which corresponds or at least approximately corresponds to the thermal expansion coefficient of the glass layer of the mirror element, in which case "at least approximately” shall be understood to mean a deviation of at most 30%, preferably of at most only 20%, even more preferably of not more than 10%, very particularly preferably of not more than 5%, the thickest layer of the preferably single-layer cover element may for example be formed by a glass layer or a GFRP.
  • the thickness extension of this glass layer corresponds at least approximately to the thickness extension of the glass layer of the mirror element, whereby the abovementioned percentage deviations are permissible here as well.
  • the thickness extension preferably corresponds to the glass layer However, (exactly) the thickness of the glass layer of the mirror element. It is also possible to implement a variant in which the cover element, preferably a rearward layer, has at least one integrated force-receiving element, preferably at least one connecting and / or mounting element.
  • the sunlight reflector i. the composite structure forming the sunlight reflector comprises only three, in particular single-ply, surface elements, i. includes solid elements which are fixed to each other via at least one adhesion promoter layer and / or at least one Anschmelz Anlagen, wherein the three elements is the front side mirror element, the middle core element and the rear cover element.
  • the thickness of the mirror element and / or the thickness of the glass layer of the mirror element less than 2.0 mm, suitably less than 1, 6 mm, preferably less than 1 , 4 mm, in particular less than 1, 5 mm, preferably less than 1, 3 mm, preferably less than 1, 2 mm, more preferably less than 1, 1 mm, more preferably less than 1, 0 mm, even more preferably from 0.9 mm or less.
  • the glass layer of the mirror element advantageously contains or consists of a glass which is very permeable to electromagnetic radiation, in particular of visible light.
  • Iron-free or low-iron glasses in particular iron-free or low-iron soda-lime glasses, fulfill this requirement.
  • quartz glass, silica glass, borosilicate glasses, etc. are advantageous.
  • the reflecting layers on the glass layer are produced, for example, by applying thin layers of silver to the surface of the glass to be mirrored, for example by means of thin glass layers.
  • B. by means of a reducing agent can be deposited from a silver nitrate solution, a uniform layer of metallic silver on the glass surface, as after a silver spraying process or show kelclar. Silvering is usually followed by copper plating.
  • the applied, very sensitive metal layers can then be protected against damage by mirror coating with special lacquers. Instead of silver can z.
  • As aluminum by vapor deposition in a high vacuum on the glass surfaces are applied.
  • Kunststoffmetallmaschine and galvanization and mirror films can be made of plastics and applied accordingly to the glass layer. The surfaces can occasionally be protected with colorless lacquer coatings to protect against corrosion.
  • the mirror element in addition to the, preferably single, layer (glass layer), carries at least one functional layer, in particular a UV protective layer for protecting the core element, preferably made of polymer, from solar light radiation and / or a corrosion protection layer for protection a reflective layer of the mirror element, in particular a silver-containing layer of the mirror element from corrosion.
  • a UV protective layer for protecting the core element, preferably made of polymer, from solar light radiation
  • a corrosion protection layer for protection a reflective layer of the mirror element, in particular a silver-containing layer of the mirror element from corrosion.
  • the reflective layer and / or the UV protective layer, such as a UV protective lacquer, and / or the corrosion protection layer are preferably arranged on a side of the glass layer of the mirror element facing the core element.
  • the cover element (including any functional layers) and / or a (preferably single) glass layer of the cover element and / or a (preferably single) composite structure of the cover element and / or preferably a single layer of the cover element a Thickness less than 2.0 mm, suitably less than 1.6 mm, more suitably less than 1.5 mm, preferably less than 1.4 mm, in particular less than 1.3 mm, most preferably less than 1, 2 mm, more preferably less than 1, 1 mm, more preferably less than 1, 0 mm, still more preferably of 0.9 mm or less / have.
  • the cover element preferably on a side facing the core element, has a radio-frequency tionale layer, for example, a UV protective layer to protect the core element from solar radiation has.
  • a radio-frequency tionale layer for example, a UV protective layer to protect the core element from solar radiation has.
  • the core element comprises or consists of at least one, preferably only one, polymer. It is particularly preferably a polymer foam, preferably weather-resistant and / or UV-resistant, in particular with a closed-cell structure. It is particularly preferred if the core element consists of a single layer, namely a polymer layer, in particular the foamed polymer layer.
  • the preferred polymers used are, for example, PVC, polystyrenes, polyurethanes and particularly preferably polyesters, such as - polyethylene terephthalate (PET).
  • the core element is also conceivable to form the core element as a multilayer composite structure, wherein a deposit structure, preferably without additional functional layers, is preferred. It is also conceivable to form the core element with a profile layer or as a profile layer, in particular with or as a shaft layer, with or as an i-profile layer (columnar structure), or with or as a honeycomb layer, for example a honeycomb structure made of plastic or metal, such as aluminum, or with or as a folded layer, as it is available for example on the market by the company Foldcore.
  • a profile layer or as a profile layer in particular with or as a shaft layer, with or as an i-profile layer (columnar structure), or with or as a honeycomb layer, for example a honeycomb structure made of plastic or metal, such as aluminum, or with or as a folded layer, as it is available for example on the market by the company Foldcore.
  • the core element consists of a glass foam layer or that the core element comprises such a glass foam layer.
  • the core element can also comprise a compact, occasionally fireproof, plastic layer.
  • the core element has a thickness of less than 200 mm, preferably less than 100 mm, preferably less than 50 mm, most preferably less than 30 mm, even more preferably from a thickness range between about 15 mm and 25 mm.
  • the total thickness of the sunlight reflector is less than 200 mm, more preferably less than 100 mm, most preferably less than 50 mm or 40 mm, most preferably less than 20 mm.
  • the inventive sunlight reflectors can be used for example in solar thermal power plants with bundling of direct radiation, such as in solar tower power plants, parabolic trough power plants, Fresnel collector systems, etc.
  • a heliostat for example, one or more, preferably 2, 3 or 4 surface elements can be used.
  • parabolic trough units for example, one or more, preferably 8 or less, elements can be used.
  • a small number of sunlight reflectors forming a heliostat or parabolic trough results in a reduction of attachment points between the sunlight reflectors and force receiving elements or support structures. The small number of attachment points in turn can minimize the installation and adjustment effort. Therefore, according to the invention, the object is also achieved by simplifying and optimizing the component and installation effort as well as the effort for adjusting the parts with respect to the control of the light by reducing the number of parts.
  • the rear cover layer additionally lend by forming stiffening form elements such as beads, or to arrange a truss in the rear cover layer.
  • stiffening form elements such as beads
  • an edge termination to protect the core layer from mechanical, actinic or chemical influences can be integrated.
  • the mirror element as a load-bearing layer, the invention makes it possible to dispense with an encircling, in particular edge-side or border-proximate frame or comparable supporting substructures, and also to dispense with, in particular circumferential, closed, bearing surfaces, such as a rear truss structure, or a supporting structure in general.
  • force absorbing elements which are preferably arranged with edge spacing and are particularly expediently spaced, are provided which can either be inserted into the composite structure, including the case is to subsume that they enforce the composite structure and / or on a surface, preferably on an outer surface of the cover element, are particularly suitably fixed by gluing.
  • fastening means for example a plate, which carries a plurality of force-receiving elements for connection to the drive unit.
  • a single such fastener is provided.
  • the production of existing composite structure that is, the lamination of the sunlight reflector can be done for example by means of vacuum bag method.
  • a negative mold which has the exact surface contour of the later component and at least one vacuum circuit, a vacuum pump and a vacuum membrane are used as the production means.
  • the tool mold is preferably made of a polymer or a metallic material.
  • the lamination of the sunlight reflector can by gluing the cover layers (mirrored glass layer, and back layer) on the core layer facing sides with adhesive (bonding agent) and the subsequent positioning of the individual layers in the order mirrored glass layer - core layer - back layer on the mold respectively. It is important to ensure an exact alignment of the layers to each other.
  • the layers to be joined can then be completely covered with a vacuum membrane on the tool mold, and the area between the tool and the membrane is to be evacuated via the vacuum circuit until complete curing of the bonding agent. After completion of the curing time of the adhesive, the finished component is to be removed from the mold.
  • FIG. 1 is a sectional view of a section of a large-area sunlight reflector, which consists of a mirror element, a core element and a rear cover element, wherein the mirror element and the cover element are fixed by melting the core element thereto,
  • FIG. 2 shows an alternative embodiment of a sunlight reflector in which bonding agent layers are provided between the elements instead of melt-on layers,
  • 4a and 4b show different views of a so-called insert formed force receiving element
  • Fig. 5 is an illustration of a so-called onsert trained
  • Fig. 8b is an illustration of the clamping connection of the connecting element with integrated feather keys.
  • a planar, large-area sunlight reflector 1 is shown in partial section in a sectional view.
  • the sunlight reflector may also be slightly concave, such that a concave curvature of the mirror element results in order to better focus the reflected sunlight.
  • the sunlight reflector may be parabolic, as indicated in Figure 7, be configured.
  • the mirror element can also be 1-axis or 2-axis curved.
  • the sunlight reflector 1 consists of a composite structure 2, wherein all elements of the sandwich structure formed as a composite structure 2 are supporting.
  • the composite structure 2 consists of a front mirror element 3 with a thickness of about 0.9 mm, a rear, single-layer cover member 4, and a sandwiched between the mirror element 3 and the cover member 4 received single-layer core element 5.
  • the thickness of the extension framed deck Mentes 4 the thickness of the mirror element 3 of 0.9 mm.
  • the thickness of the single-layer core element 5 is 20 mm in the exemplary embodiment and is preferably selected from a value range between 15 mm and 25 mm. This results in a total thickness of the sunlight reflector 1, more precisely, the composite structure 2, of about 27 mm.
  • the core element 5 is a preferably UV-stable, foamed polymer, wherein in the case of UV protective layers to be explained later on the cover element 4 and / or the mirror element 3, reference is also made to a non-UV-stable polymer can be. In the embodiment shown, it is a foamed, single-layered PET core.
  • the core element 5 may comprise or be formed from a composite material such as so-called thermoset paper.
  • a composite material such as so-called thermoset paper.
  • the use of at least one metallic material is also conceivable.
  • the core element 5 as a profile structure, for example as a so-called honeycomb structure, such as a honeycomb structure made of metals, in particular aluminum or plastics, is also conceivable.
  • the mirror element 3 and the cover element 4 are fixed to the core element 5 by gluing the core element 5 on both sides and thereby forming a respective melting layer 6 (plastic welding) or glued to it.
  • a stable, self-supporting composite structure 2 is obtained, the essential part of which is the mirror element 3.
  • the sunlight reflector 1 can therefore be formed without a circumferentially closed frame and without the need to provide rear large-area support structures.
  • the mirror element 3 and the cover element 4 are fixed on the core element 5 via a bonding agent layer 7 in each case. On a melting of the core element 5 has been omitted.
  • a Such an embodiment is used in particular when the core element 5, which is formed in one layer in the embodiment shown, is not meltable on its surfaces, since the mirror element 3 and / or the cover element 4 can be fixed thereby. This may be the case, for example, if the cover element 4 is formed in multiple layers and at least one of the outer layers is not formed of polymer or if the core element 5 consists of a metallic material, for example.
  • Fig. 3 is a sectional view and a possible structure of a mirror element 3 is shown.
  • This comprises a glass layer 8 made of a glass with a thickness of preferably less than 0.9 mm.
  • a reflective layer 9 which may contain silver
  • a protective layer 10 such as a corrosion protection layer or a passivation layer , preferably containing copper, which protects the reflective layer 9 from corrosion.
  • at least one layer 1 is applied which is formed from a UV or anticorrosion paint and which is intended to protect the silver layer from corrosion and the core element 5 from UV radiation.
  • a possible embodiment of a force receiving element 12 is shown, which is inserted into the composite structure 2 of the sunlight reflector 1, in the embodiment shown such that a screw-in flush with the cover element 4.
  • an internal thread 13 on which the sunlight reflector 1 can be fixed with a screw, in particular on a pivoting device.
  • the force-receiving element 12 is in two parts and comprises the in FIG. shown inner threaded member 14 and a female thread member 14 holding counterpart 15, which preferably ends within the sunlight reflector 1, so the mirror element 3 is not interspersed in order not to minimize the reflective surface.
  • FIG. 5 shows an alternative force-receiving element 12, which is fixed to the surface of the cover element 4, for example by gluing. It can also be seen here an internal thread element 14 with internal thread 13 for direct force absorption, whereby other elements for producing a flow of form with a counter element are conceivable.
  • Fig. 6 a shows a heliostat 16, comprising a three-element sunlight reflector 1, as shown, frameless, respectively. self-supporting, is executed and only selectively connected via force receiving elements 12 with an adjusting device 17, with which the sunlight reflector 1 is tiltable and pivotable about an axis of rotation.
  • the sunlight reflector is thus adjustable in all three dimensions.
  • FIG. 6 b shows a heliostat 16 which, like the exemplary embodiment according to FIG. 6a, comprises a three-element sunlight reflector 1, which is designed to be self-supporting.
  • a rear connecting element 18 eg plate
  • force receiving element 12 which in turn carries or has a plurality of positive locking elements (eg thread) for connection to the adjusting unit.
  • the connecting element 18 forms a fastening element (fastening means) arranged centrally here, which contains the force-receiving elements.
  • the example executed as a plate 18 fastener may be integrated as an insert or Onsert be formed. Instead of a plate 18, other support structures may be provided.
  • a support structure for force receiving elements which is preferred, but not mandatory, centrally located.
  • a parabolic trough unit is shown, which is equipped with three-part, self-supporting sunlight reflectors 1 analogous to the examples of heliostats in Fig. 6 a, b.
  • the reflectors 1 are fastened locally with a connecting force introduction element 19 on a driven structure 20, which is preferably designed as a tube with grooves.
  • the connecting element 19 is reflector-side preferably by material adhesion via a bonding agent layer (adhesive bond) and structurally by force and / or or by positive engagement (clamp connection, preferably with groove and feather key) connected. On a filigree, formed to the edges of the reflector support structure can be dispensed with.
  • FIG. 8 a shows such a force introduction element 19 for parabolically curved sunlight reflectors 1, which is connected to the surface by means of adhesive bond with the sunlight reflector and with a clamping connection 21 with the driven structure 20.
  • the clamping connection 21 is shown in Fig. 8b.
  • integrated key springs 22 can also be seen which are intended to ensure a defined alignment of the reflectors 1 corresponding to the grooves of the driven structure 20.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un réflecteur de lumière solaire (1) de grande surface pour une centrale solaire, ayant une superficie d'au moins 1 m2 et une structure composite (2), comprenant un élément spéculaire (3) comprenant une couche de verre, un élément central (5) et un élément de couverture arrière (4). Selon l'invention, l'élément spéculaire (3) est directement fixé à l'élément central (5) au moyen d'une couche fusible (6) de l'élément central (5) ou au moyen d'une couche d'adhésif (7), en particulier par liaison de matière.
PCT/EP2011/002574 2010-06-01 2011-05-25 Réflecteur de lumière solaire pour une centrale solaire WO2011151030A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010022423.5 2010-06-01
DE102010022423A DE102010022423A1 (de) 2010-06-01 2010-06-01 Sonnenlichtreflektor für ein Solarkraftwerk

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WO2011151030A2 true WO2011151030A2 (fr) 2011-12-08
WO2011151030A3 WO2011151030A3 (fr) 2012-03-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013051999A1 (fr) * 2011-10-07 2013-04-11 Carbonia Composites Ab Unité de structure en sandwich pour miroirs de capteur solaire

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102692698B (zh) * 2012-06-06 2014-04-02 上海沪渝实业有限公司 聚光反射装置及其制作方法

Citations (2)

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Publication number Priority date Publication date Assignee Title
US4124277A (en) 1977-02-16 1978-11-07 Martin Marietta Corporation Parabolic mirror construction
US5151827A (en) 1990-05-18 1992-09-29 Aurinco Holdings Limited Self-supporting mirror and method for the manufacture thereof

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
US4238265A (en) * 1978-10-27 1980-12-09 The Boeing Company Method of manufacturing a glass parabolic-cylindrical solar collector
US7077532B1 (en) * 2000-04-05 2006-07-18 Sandia Corporation Solar reflection panels
US8327604B2 (en) * 2007-10-18 2012-12-11 Gossamer Space Frames Mini-truss thin-sheet panel assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124277A (en) 1977-02-16 1978-11-07 Martin Marietta Corporation Parabolic mirror construction
US5151827A (en) 1990-05-18 1992-09-29 Aurinco Holdings Limited Self-supporting mirror and method for the manufacture thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013051999A1 (fr) * 2011-10-07 2013-04-11 Carbonia Composites Ab Unité de structure en sandwich pour miroirs de capteur solaire
US9557453B2 (en) 2011-10-07 2017-01-31 Carbonia Composites Ab Sandwich structure unit for solar collector mirrors

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WO2011151030A3 (fr) 2012-03-15

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