EP2483064A2 - Procédé de production d'un miroir façonné, et collecteur cylindro-parabolique pour capteurs de chaleur solaire - Google Patents

Procédé de production d'un miroir façonné, et collecteur cylindro-parabolique pour capteurs de chaleur solaire

Info

Publication number
EP2483064A2
EP2483064A2 EP10774147A EP10774147A EP2483064A2 EP 2483064 A2 EP2483064 A2 EP 2483064A2 EP 10774147 A EP10774147 A EP 10774147A EP 10774147 A EP10774147 A EP 10774147A EP 2483064 A2 EP2483064 A2 EP 2483064A2
Authority
EP
European Patent Office
Prior art keywords
mirror
layer
solar
trough
carrier layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10774147A
Other languages
German (de)
English (en)
Inventor
Lukas Kirscht
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mithras Holding GmbH and Co KG
Original Assignee
Mithras Holding GmbH and Co KG
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 Mithras Holding GmbH and Co KG filed Critical Mithras Holding GmbH and Co KG
Publication of EP2483064A2 publication Critical patent/EP2483064A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00596—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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • B32B17/04—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments bonded with or embedded in a plastic substance
    • 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
    • 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
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • 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
    • 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
    • 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
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1866—Handling of layers or the laminate conforming the layers or laminate to a convex or concave profile
    • 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
    • F24S2023/87—Reflectors layout
    • F24S2023/874—Reflectors formed by assemblies of adjacent similar reflective facets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/601—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by bonding, e.g. by using adhesives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S2080/01—Selection of particular materials
    • 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

  • the present invention relates to a method for producing a shaped mirror, in particular for bundling irradiated sunlight, a molded mirror produced by the method, and a parabolic trough that uses the shaping mirror.
  • Mirrors and mirror elements which have a predetermined three-dimensional shape and in particular are designed as a concave mirror, are used in many areas for reflection and guidance of visible and invisible light.
  • An application is, for example, the formation of concave mirrors or mirror elements, in which sunlight is reflected and concentrated at predetermined locations. More specifically, this application relates to the formation of parabolic mirrors which are assembled into so-called parabolic troughs.
  • parabolic shape curved mirrors or mirror elements are arranged on a correspondingly designed carrier device such that the parabolic trough is formed and the concentrated sunlight reflected by the parabolic trough is focused on a focal line of the parabolic trough on an absorber tube which runs along the focal line.
  • Such an arrangement serves as an energy source of a solar thermal power plant, wherein the parabolic mirrors or mirror elements of the parabolic trough as a reflector for the to serve incident sunlight.
  • the absorber tube is flowed through by a heat transfer fluid, wherein in the course of flow of the heat transfer fluid through the absorber tubes of the entire parabolic trough the heat transfer fluid is heated so that directly or via a heat exchanger steam can be generated, by means of which a turbine is driven, which in turn one with the Turbine connected generator can provide power to provide electrical power.
  • the parabolic mirrors and the associated absorber tube arranged in the focal line form a solar collector, and a plurality of solar collectors forms the parabolic trough, wherein a plurality of parabolic trough rows for the solar thermal power plant are arranged depending on the expected and intended performance.
  • the parabolic troughs and in particular the parabolic mirrors or mirror elements are precise optical devices which have to be aligned less than a millimeter in order that the incident sunlight can be bundled as well as possible in the absorber tube for heating the heat transfer fluid.
  • parabolic curved individual mirrors are assembled into a larger parabolic mirror (parabolic mirror).
  • the individual curved mirror elements are arranged on a steel girder construction as a carrier and fastening device.
  • bent glass as a basis for the production of parabolic mirrors or parabolic curved mirror elements is very expensive and requires large amounts of energy, since in general by means of a gas burner, the glass must be heated to about 600 C. The facilities required for this have a large footprint and also cause significant costs.
  • a bending operation for producing the bent glass essentially involves heating, bending the glass and cooling, which requires a longer time of production, which may be more than 16 hours. Furthermore, the glass required is very heavy and therefore cumbersome in manufacturing, handling and assembly.
  • a mirror having a thickness of, for example, about 4 mm and an area of about 2 m 2 comprises a mass of 25 kg, including the corresponding fastening elements, in order to arrange the mirror on a suspension device.
  • the object of the present invention is to design a method for producing a shaped mirror with a predetermined curvature in such a way that both the production of the shaping mirror and the handling of the finished shaping mirror are considerably simplified.
  • this object is achieved by a method for producing a shaped mirror having the features specified in claim 1, with a shaped mirror having the features specified in claim 13, as well as with a parabolic trough having the shaping mirror.
  • the method according to the invention relates to the production of a shaping mirror which has a predetermined curved surface.
  • the method comprises the steps: forming a shaped body in which at least part of its surface reflects the predetermined curved surface, applying in full-surface and gap-free manner a glass layer to the predetermined curved surface of the shaped body, wherein the glass layer has a surface with respect to the bearing surface to the molded body, on which a mirror coating is arranged, and applying a carrier layer to the mirror coating, wherein the carrier layer is connected to the mirror coating and after separating the mold mirror of the molded body maintains the predetermined curvature.
  • the moldings serving as the basis molding is formed in a precise manner, and thus it takes the approximately full-surface and gap-free applied to the molding glass, which is formed substantially as a thin glass layer, the shape and thus the predetermined curvature of the molding ,
  • the glass layer produced as a flat thin layer the residual ripple of the glass is considerably reduced and reduced to almost zero in comparison with the bent glass produced with the complex production process.
  • the efficiency of a solar collector of a solar thermal power plant equipped with the inventive shaped mirrors can be increased, at the same time ensuring uniform heating of the heat carrier fluid in the absorber tube in the focal line of the solar trough.
  • the shaping of the shaped mirror by means of the molding on which the thin glass layer including the mirror coating and after the carrier layer is applied also allows simplified operations in the production of the mold level or parts thereof (molded mirror parts), so that no great demands are placed on a specialist and at the same time the risk of producing rejects is reduced.
  • the shaping mirror comprises the carrier layer permanently ensuring the predetermined curvature. Compared to known designs of a curved mirror depending on the size of the mold mirror or parts of the mold mirror results in a significant reduction in weight, in some cases the weight achieved in connection with the inventive method is less than half the weight of known designs of curved mirrors.
  • the lower weight also leads to a facilitated and therefore cost-effective transport of the mold mirror or molded mirror parts, and also facilitates the assembly of the parts at the installation of the mold mirror, for example, at the site of a solar thermal power plant.
  • the reduced weight thus also allows the consideration of sites of solar thermal power plants with the inventive mirrors on buildings without significant measures to secure and reinforce the building are required.
  • the carrier layer may consist of a plastic material, and in particular of a GfK composite material.
  • a strength is achieved with low weight.
  • the thickness of the glass layer may be in a range of 2 mm to 3 mm, so that the path of irradiated light through the glass layer is small.
  • the step of applying a carrier layer comprises the step of applying the carrier layer in a plurality of individual layers.
  • at least one of the individual layers of the carrier layer can not completely cover the surface of the glass layer curved in a predetermined manner. In this way, material can be saved while stability.
  • the surface of the shaped body which is curved in a predetermined manner at least partially follows the course of a parabola, so that a parabolic mirror is formed which is suitable for a solar thermal power plant.
  • the shaped body for carrying out the method may be designed such that the surface of the shaped body curved in a predetermined manner reproduces at least part of the shape of a parabolic trough.
  • the mold mirror can be formed in this way in parts, whereby the handling is facilitated.
  • the individual layers of the carrier layer can be applied to the silvering by lamination. At least one of the individual layers of the carrier layer applied directly to the mirror can be applied over the entire surface and the surface of the glass layer can be completely covered, and at least one of the further individual layers of the carrier layer can not completely cover the surface of the previously applied single layer of the carrier layer, thus saving material and a reduction in weight can be achieved.
  • the step of applying the carrier layer to the mirror coating may include incorporating fasteners into the carrier layer so that the forming mirror can be easily attached to carrier devices in conjunction with the carrier layer.
  • the method of manufacturing a mold mirror having a predetermined curved surface comprises the steps of: forming a molded article having at least two frame members, the shape of the frame elements reflecting the predetermined curved surface of the molding game pattern; Applying a metal layer to the shaped body, wherein the metal layer has a surface adjacent to the shaped body, on which a reflective coating is arranged, and applying at least two carrier elements to the metal layer, wherein the carrier elements are connected to the metal layer and after separating the forming mirror of the shaped body maintain the predetermined curvature.
  • the thickness of the metal layer may be in a range of 1 mm to 3 mm.
  • the present invention further includes a mold mirror having a metal layer which has a predetermined curved shape and wherein one of the surfaces of the metal layer has a mirror finish, at least two support members applied to and fixed to the other surface of the metal layer the shaping mirror can be produced by means of the method described above according to the second aspect of the invention.
  • the present invention also includes a mold mirror having a glass layer which has a curved shape in a predetermined manner and wherein one of the surfaces of the glass layer has a mirror finish and a support layer applied to and fixed to the mirror surface.
  • the shaping mirror can be produced by means of the abovementioned method according to the invention in accordance with the first aspect.
  • a parabolic trough according to the invention for solar collectors of a solar thermal power plant can have at least one of the above-described shaping mirrors.
  • FIG. 1 shows a simplified schematic representation of a shaped body according to a first exemplary embodiment of the present invention
  • FIG. 2 shows a schematic representation of the application of a glass layer to the shaped body according to FIG. 1,
  • FIG. 3 shows a schematic representation of the shaped body according to FIG. 1, in which the entire surface of the glass layer is applied,
  • FIG. 4 shows a schematic representation of the shaped body according to FIG. 1, including the entire glass layer, wherein a carrier layer is applied to the glass layer
  • FIG. 5 shows a schematic representation of the shaped body according to FIG. 1 and with the glass layer and the complete carrier layer according to FIG. 4,
  • Figure 6 is a schematic representation of the shaped body including the
  • FIG. 7 shows a schematic illustration of two shaped mirror parts that are assembled to form an entire shaping mirror.
  • FIG. 8 shows a schematic representation of the shaped body according to FIG. 1 and the glass layer and the carrier layer on which supporting elements are arranged, FIG.
  • FIG. 9 shows a schematic representation of shaped mirror parts with support elements according to FIG. 8, FIG.
  • FIG. 10 shows a schematic representation of a solar collector in the form of a parabolic trough, which is formed by shaped mirror elements,
  • Figure 1 1 is a simplified schematic representation of a shaped body according to a second embodiment of the present invention.
  • Figure 12 is a schematic representation of a shaped game gel according to the second embodiment.
  • FIG. 1 shows, in a simplified perspective view, the arrangement of a molded body 1, which serves as the basis for the production of the shaping mirror.
  • the molded article 1 is formed such that at least one side of the molded article 1 has a curved surface 2 with a predetermined curvature.
  • the predetermined curved surface 2 has a curvature which has the negative shape of the desired curvature of the mold level F to be produced (see, for example, FIGS. 7, 9 and 10).
  • a solar thermal power plant follows the curvature of the desired parabolic shape.
  • the predetermined curvature is thus that of a parabola.
  • the invention is not limited to the formation of a parabolic shape. Rather, any shapes can be formed.
  • the first layer consists of a glass layer 3, which is applied to the curved surface 2 of the shaped body 1 in such a way that it rests there approximately over the entire surface and without gaps, and thus follows the surface 2 which has been curved in a predetermined manner.
  • the glass layer 3, which is preferably made of thin glass, is applied to the curved surface 2, in which the glass layer is cold (at room temperature) corresponding to the curved surface 2 is bent.
  • the glass layer resting directly on the molded body is retained by, for example, holding elements 1a being used.
  • the holding elements 1a fasten and preferably hold the glass layer 3 at the edge regions thereof so that the glass layer 3 assumes the desired predetermined shape.
  • openings 1 b are arranged at different locations on the predetermined curved surface of the molded body 1, which are connected to a negative pressure generating device (not shown) and wherein the glass layer 3 is sucked onto the molded body 1 and thus the glass layer 3 over the entire surface and the predetermined shape of the molding follows, which is maintained during further processing.
  • the thickness (thickness) of the glass layer is in a range of about 2 mm to 3 mm, and is preferably 2.2 mm to 2.5 mm. With this glass thickness, the path that generally light rays and in particular sun rays must travel through the material of the glass when using the mold mirror F, for example, in a solar thermal power plant decreases from about 8 mm or more in known versions of curved mirrors to about 4 , 4 mm to 5 mm. The efficiency of the entire mirror assembly can be increased.
  • a mirror coating 4 is applied on one side (surface) of the thin glass layer 3, which does not abut the molded body 1, i. on a first surface 31 opposite the support surface (a second surface 32) of the glass layer 3 to the molded body 1, a mirror coating 4 is applied.
  • the first surface 31 for receiving the mirror coating 4 is prepared in a corresponding manner, i. E. essentially cleaned and polished, and the mirror coating 4 consists essentially of a thin metallization layer which is applied to the first surface 31 of the glass layer 3 and on its back side (the then exposed surface of the mirror coating 4) receives a protective coating.
  • the preparation of the glass layer 3 on its first surface 31 as well as the mirroring at the time of the manufacture of the glass layer 3 may be carried out, or the preparation of the glass layer 3 and mirroring, i. the application of the reflective coating 4 on the first surface 31 of the glass layer 3 are also made when the glass layer 3 is already arranged and fixed on the molded body 1.
  • the application of the mirror coating 4 by special methods under a protective atmosphere in the form of a very thin layer.
  • a carrier layer 5 is applied to the glass layer 3 on the side of the reflective coating 4, ie, to the mirror coating 4, the carrier layer 5 being fixedly connected to the glass layer 3 or the mirror coating 4.
  • the carrier layer 5 may for example consist of a plastic composite material.
  • a Gf K composite material plastic matrix with glass fibers
  • glass fiber mats can be applied (laminated) in conjunction with a two-component resin.
  • the shape of the carrier layer 5 applied over the entire surface of the glass layer 3 and the mirror coating 4 follows completely the predetermined curvature, and thus in the case of the application of the shaping mirror F in a solar thermal power plant, the curvature of a parabola.
  • the support layer 5 connected to the entire surface of the glass layer 3 and the mirror coating 4 retains the predetermined curvature after curing and thus serves to support and support the glass layer 3 thereon with the mirroring 4 as a mirror element, so that the predetermined curvature of the formed mirror F during the Life of the mold mirror F is maintained.
  • the predetermined curvature and thus, for example, the parabolic shape are maintained.
  • the formation of the carrier layer 5 is not limited to the plastic composite material, but may also be formed, for example, from an epoxy foam. In this case, it is necessary that the layer thickness of the epoxy foam assumes a predetermined size, so that the required inherent stability of the support layer 5 is ensured and also over a longer period of operation, for example, a solar trough for a solar thermal power plant, the parabolic shape and thus the support property for the mirrored glass layer 3 can be maintained.
  • the carrier layer 5 in the form of a layer (single layer, single layer) is shown, and it is the carrier layer 5 over the entire surface connected to the glass layer 3 on the side of the mirror 4.
  • the carrier layer 5 may consist of different individual layers, wherein these different individual layers may be applied successively on the glass layer 3 or on the previous single layer of the carrier layer 5.
  • a first single layer 51 of the carrier layer 5 can be directly on the silvering 4 of the glass layer 3 are applied.
  • the first individual layer 51 of the carrier layer 5 completely covers the surface of the glass layer 3 and the reflective coating 4.
  • the first single layer 51 thus already produces a carrier property for the glass layer 3 including the mirror coating 4 and also protects the silver coating 4 from its rear side.
  • a second single ply 52 can be applied to the first single ply 51, wherein the second single ply 52 can cover the same area and thus the total area of the glass layer 3, this corresponding to the total area of the first single ply 51.
  • the second single ply 52 can occupy only a part of the total area covered by the first single ply 51, wherein in the illustration according to FIG. 6 it is indicated that the second single ply 52 ends before the right edge of the first single ply 51.
  • a further single layer such as a third single layer 53 of the carrier layer 5, the total area of the previous single layer 52 or also cover a smaller area compared to the area covered by the second single layer 52 area.
  • the third individual layer 53 preferably covers only a part of the area covered by the second single layer 52.
  • at least one of the individual layers of the carrier layer 5 can not cover the entire surface of the glass layer (3).
  • FIG. 6 shows a fourth individual layer 54, wherein the number of individual layers depends on the thickness (thickness) of the individual individual layers and thus on the stability of the entire arrangement of the shaping mirror F or the relevant part of the shaping mirror F.
  • the part of the shaping mirror shown in FIG. 6 is combined with a similar further part of the shaping mirror F to form an entire shaping mirror F, so that at the outer ends of the respective parts of the shaping mirror F the corresponding further individual layers do not cover the entire surface of the glass layer 3.
  • FIG. 7 shows, in a simplified and schematic manner, the arrangement of two (preferably symmetrical) parts of the shaping mirror F which, when assembled on each of their sides, for example, produce a parabolic trough.
  • the two parts of the shaping mirror F are connected to one another and to the holding device 6 in the region of a holder arrangement 6.
  • the attachment to the holding device 6 and the parts of the mold Mirror F ensures each other that also comply with the items in their entire arrangement the desired curvature and thus, for example, the arrangement according to the course of a parabola.
  • each part of the shaping mirror F has, for example, the individual layers 51, 52 and 53 of the carrier layer 5. While the first single layer 51 covers the entire surface of the glass layer 3 and the mirror coating 4 in the same manner as shown in FIG. 6, the second and third single layers 52 and 53 of the respective parts of the mold mirror F are applied to their outer sides in that not the entire surface of the glass layer 3 is covered. In this way, the formation of a respective single layer of the carrier layer 5 can be made such that on the one hand a saving of material is possible, and on the other hand, the mechanical stability of the entire mold mirror F and compliance with the predetermined curvature (for example, a curvature corresponding to a parabola) is guaranteed ,
  • the shaping mirror shown in FIG. 7 can preferably be rotated or pivoted on an axis of rotation 7 in the region of the holding device 6 in order to enable a tracking according to the changing position of the sun.
  • FIG. 7 shows an absorber tube 8 above the shaping mirror F, through which flows a fluid heat transfer medium, for example a thermal oil or a correspondingly treated water.
  • the absorber tube 8 is arranged at the dividing line of the parabolic trough, consisting of the shaped mirror F, and the sun rays reflected by the shaping mirror F in a predetermined manner are bundled in the focal line and thus on the absorber tube 8, so that the heat transfer medium flowing in the absorber tube 8 is heated.
  • the collectors from the mold mirrors F in conjunction with solar radiation is the primary heat source.
  • the heat transport to a steam generator by means of the fluid heat transfer medium in the absorber tubes flows.
  • the carrier layer 5 is indicated as a (also consisting of several individual layers) layer which protects the one hand, the relatively thin glass layer 3 with the mirror 4, and on the other hand ensures that the desired shape (the predetermined curvature) of the mold mirror F also in the long term is complied with. This ensures a consistently high efficiency of the solar collectors or parabolic trough of the solar thermal power plant, or in other applications consistent predetermined mirror properties.
  • FIG. 8 shows in the same way as FIG. 5 the arrangement of the molded body 1 on which the thin glass layer 3 including its silver coating 4 is applied.
  • the carrier layer 5 is formed on the glass layer 3 and in particular the mirror coating 4 arranged thereon, the carrier layer 5 being formed as a single layer in the illustration of FIG. 8 for the sake of simplicity.
  • FIG. 8 shows such a carrier element 9, which is designed as a substantially planar metal construction, preferably made of steel or light metal.
  • the essentially flat carrier element 9 lies in the plane of the paper.
  • the carrier element 9 has recesses at predetermined locations, the stability of the carrier element 9 being ensured.
  • fastening elements 10 are preferably installed in the carrier layer 5, so that the carrier element 9 with the shaped mirror F and in particular the carrier layer 5 is provided by means of these fastening elements 10, which are provided in a predetermined required number can be connected stable and detachable.
  • the carrier elements 9 in conjunction with the fastening elements 10 arranged on the carrier layer 5 an overall stability of the shaped mirror F or of a part of the shaped mirror F is ensured, since both the carrier layer 5 and the respective carrier elements 9 contribute to the stability of the entire Shape mirror F contribute.
  • FIG. 9 shows in a similar manner as in Figure 7, the formation of an entire shape mirror F of two preferably symmetrical parts of the mold mirror F, which are connected to each other in connection with the holder means 6.
  • the two interconnected parts of the shaped mirror F are substantially parts, as shown in Figure 8, wherein on the support layer 5 by means of the fastening elements 10, the support elements 9 are arranged.
  • two individual layers are provided in the form of a first single layer 51 and a second single layer 52 of the carrier layer 5, for example, and in the second single layer 52 the fastening elements 10 are installed on which the carrier elements 9 are arranged can be.
  • the support elements 9 each follow the entire curve of the mold mirror F, since the stability of the entire arrangement, ie the mold mirror F or the parts of the Formspiegeis F is sufficiently ensured by the connection of the support elements 9 with the support layer 5. If the carrier layer 5 has a plurality of individual layers, then the fastening elements 10 are arranged in at least one of the individual layers.
  • the entire shaped mirror F is rotatable in connection with the axis of rotation 7, or pivotable, so that tracking to the changing position of the sun is ensured.
  • the absorber tube 8 is indicated in Figure 9, which is flowed through in the present case in the application of the mold level at a parabolic trough of a solar thermal power plant from the fluid heat transfer medium.
  • the entire arrangement of the mold mirror F or the parabolic trough formed from at least two mold mirror parts according to FIG. 9 ensures compliance with the predetermined curvature, and in particular the curvature with the course of a parabola, so that even with a longer operating time and thus a longer residence time Outdoor arrangement, the predetermined curvature of the mirror surface (the glass layer 3 in conjunction with the mirror coating 4) is securely maintained. Deterioration of the efficiency of the entire parabolic trough by a change in the course of the life of the arrangement curvature is thus avoided. Furthermore, the above-described arrangement of the entire mold level F or the parts of the mold level F for corresponding personnel is easy to handle, especially with regard to shipping and assembly of the parts of the mold mirror F.
  • the arrangement of the shaping mirror F according to the present invention and the above description thus connects the thin glass layer 3, on which a mirror coating 4 is applied, with the carrier layer 5 (also multi-layered, for example), the carrier layer 5 comprising the glass layer 3 and the mirror coating 4 protects and holds in the form, ie with the predetermined curvature, which is predetermined by the predetermined curvature 2 of the shaped body 1.
  • the carrier layer 5 also multi-layered, for example
  • the carrier layer 5 comprising the glass layer 3 and the mirror coating 4 protects and holds in the form, ie with the predetermined curvature, which is predetermined by the predetermined curvature 2 of the shaped body 1.
  • Any number of shapes can be used here.
  • the above description shows as an example the application in a parabolic trough for a solar thermal power plant, the predetermined curvature 2 of the shaped body following a parabola line.
  • the molded mirror F can be formed as a single piece, and thus the individual solar collector of the parabolic trough can be formed in one piece, or the shaping mirror F can be formed from a plurality to form a predetermined mirror surface, such as a parabolic trough consist of parts of the mold mirror F. This arrangement is shown in FIG. 10 using the parabolic trough as an example.
  • the mirror glass of the glass layer 3 with the mirror coating 4 and the carrier layer 5 have essentially the same coefficient of expansion, so that only slight stresses occur at temperature differences in the transition between the curved surface of the glass layer 3 and the carrier layer 5.
  • the glass layer 3 with the mirror coating 4 is firmly connected to the carrier layer 5 (and in the case of the multilayer carrier layer 5 to the first carrier layer 51) and the entire surface.
  • the small thickness of the glass layer 3 has the advantage that the glass layer 3 does not have to be pre-bent before the glass layer 3 is applied to the shaped body 1 in order to determine the predetermined curvature 2.
  • the bending process can be done cold in conjunction with the simple application of the glass layer 3 on the molded body 1.
  • the carrier layer 5, also in its multilayer embodiment according to, for example, FIGS. 6 and 7, can have UV protection.
  • the plastic composite material for example of GfK composite material (glass fiber reinforced plastic) or an epoxy foam may have a UV protection.
  • the material properties can be retained longer, so that the life of the carrier layer 5 can be extended.
  • the overall arrangement has a high strength with at the same time low material expenditure and a high long-term stability.
  • the entire assembly has sufficient flexibility, and is characterized by a low vibration. Furthermore, reliable transport of the shaped mirror F or parts of the shaped mirror F is ensured since the glass layer 3 is firmly connected to the carrier layer 5 and thus there is only a slight probability that the glass layer 3 can be damaged.
  • the low weight and thereby facilitated handling of the mold level or parts also allow the reduction of freight costs.
  • the production costs are considerably reduced, also with regard to the possibility of using a average qualified personnel and the use of simpler facilities.
  • the production of the mold level F according to the method described above can be carried out under normal air conditions, so that no special clean room conditions are required.
  • the need in the case of the application of a glass fiber fabric for forming the carrier layer 5 plastic materials such as resin and hardener require no special storage conditions and there are no polluted wastewater in the production.
  • the simplified production process also produces very little rejects, even if the manufacturing process is performed by a simple staff.
  • the entire structure of the mold mirror F requires in connection with the carrier layer formed from a plastic composite material 5 no further conservation.
  • the production of the shaping mirror is simplified, since the surface 2 of the shaped body 1, which is curved in a predetermined manner, is such that, after fixing the glass layer 3 and applying the carrier layer 5, the entire arrangement of the shaping mirror F is slightly different from that of FIG Separate molded body 1. After curing of the carrier layer 5, the shaping mirror F is stable in terms of shaping and handling and can be further processed in a simple manner.
  • FIG. 11 shows, in a simplified perspective view, the arrangement of a shaped body 40 according to the second exemplary embodiment, which serves as the basis for the production of the shaping mirror f (see FIG. 12).
  • the molded body 40 is formed so as not to have a smooth and predetermined curved surface (2 in FIG. 1). Rather, the molded body 40 consists of at least two frame elements 41, which are arranged standing on a corresponding substructure unit 43.
  • the substructure unit 43 comprises a plurality of subcomponents 44, which are assembled to form a stable frame carrying the at least two frame elements 41.
  • the vertical at least two frame elements 41 are preferably arranged parallel to one another.
  • the frame elements 41 On their edges remote from the substructure unit 43, the frame elements 41 have a corresponding profile or the predetermined curvature.
  • the predetermined curved edges of the frame elements 41 have a curvature which represents the negative shape of the desired curvature of the shaped mirror F to be produced (see, for example, also FIGS. 7, 9 and 10).
  • the curvature of the desired parabolic shape follows.
  • the predetermined curvature is thus that of a parabola.
  • the invention is not limited to the formation of a parabolic shape. Rather, any shapes can be formed.
  • FIG. 11 shows, as an example, the arrangement of four frame elements 41, the invention not being fixed to this number of frame elements 41.
  • the bulkhead elements are connected to a further stabilizing element 45 to secure the parallel arrangement.
  • a metal layer 30 is applied to the plurality of substantially similar chipboard elements 41 to form the shaped game gel F, which is fastened during manufacture in such a way that the metal layer 30 takes on the shape of the chipboard elements 41 and thus the predetermined curvature. This is done in a similar manner, as shown in Figures 2 and 3 in connection with the first embodiment with the application of the glass layer 3, being used by the arrangement of the molded body 40 in comparison to the molded body 1 holding elements. At least two carrier elements 31 are applied to the metal layer 30 (back) for stabilization in the state of attachment to the above-described shaped body 40 according to FIG.
  • the carrier elements 31 are fastened and permanently connected on the rear side of the metal layer 30, ie on the side of the metal layer 30 facing away from the shaped body, by means of welding or preferably by gluing.
  • a two-component adhesive can be used, which has a great long-term stability.
  • FIG. 12 shows the arrangement of the metal layer 30 which is detached from the shaped body 40 and which is stably held in the desired shape by the at least two support elements 31 applied on the rear side.
  • the support member 31 thus serves on the one hand for shape retention, d. H. for obtaining the predetermined shape of the metal layer 30 of the molded game gel F, as well as for providing means for attaching the game play gel to a substructure at the location of the insert.
  • the illustration in FIG. 12 schematically shows a shaping game gel and also applies to shaped mirror elements if the shaped mirror F is produced in several parts for technical reasons (assembly, transport).
  • the associated absorber tube 8 and a corresponding holder 81 are indicated.
  • a reflective coating 32 is arranged on its upper side (front side) in the figure.
  • the reflective coating 32 is either applied as a reflective separate layer on the corresponding pretreated metal layer 30, or the surface of the metal layer 30 is polished so that the desired reflectance is achieved.
  • the reflective coating 32 is thus located on the side of the metal layer 30, which is adjacent to the molded body 40 during the mounting on the molded body 40 in the course of manufacture.
  • the metal layer 30 including the reflective coating 32 may have a thickness (thickness) of about 1 mm to 3 mm.
  • the metal layer 30 may, for example, consist of a polished or coated aluminum plate or a corresponding steel plate. However, the invention is not limited to these materials. Instead of the metal Layer 30 may also be a correspondingly thin plastic layer (plastic plate) are used, which have on the side which rests on the molding 40 and thus adjacent to the molding 40, a corresponding VerLiteung.
  • the method for producing the shaped mirror F thus comprises the following measures and steps: forming a shaped body 40 with the at least two rib elements 41, wherein the shape of the rib elements 41 conveys the predetermined curved surface of the forming yoke F, applying the metal layer 30 the shaped body 40, wherein the metal layer 30 has a surface adjacent to the molded body 40, on which the mirror coating 32 is arranged, and applying the at least two support members 31 to the metal layer 30, wherein the support members 31 are connected to the metal layer 30 and after the separation of the mold mirror F of the molded body 40 maintain the predetermined curvature.
  • the thickness of the metal layer 30 used may preferably be in a range of 1 mm to 3 mm.
  • the embodiment of the shaping mirror according to the second embodiment can also be modified in such a way that instead of the at least two support elements 31 in the manner as shown in connection with the first embodiment, a carrier layer preferably laminated in individual layers (like the carrier layer 5 according to FIG Figures 5 and 6) is applied. Again, the carrier layer is solid connected to the metal layer and ensures the desired predetermined shape of the mold mirror.
  • the metal layer 30 for the mold mirror the same operations as described for the mold mirror with the use of the glass layer 3 above in connection with the first embodiment can be applied.
  • parabolic trough power plants which are designed as so-called solar power plants: Parabolically curved mirror plates form a solar trough, in the focal line of an absorber tube is arranged. In the absorber tube, a heat transfer medium is heated by the incoming sunlight. In order to enable the tracking of the solar trough with the different position of the sun, the solar trough is held about its longitudinal axis or parallel thereto pivotally mounted on a support device.
  • the mirror surface which is located between two floor supports, is referred to as a solar trough, but in practice a series of rows of floor supports is provided and the respectively between arranged solar troughs are all aligned the same and thus form a multi-segment existing, very long solar trough.
  • a segment between two floor supports is referred to as solar trough.
  • the support assembly comprises between the two floor supports one or more longitudinal struts, each extending in a straight line, said longitudinal supports carry bent frames, which extend transversely to the longitudinal supports and allow their bending the inclusion of the curved solar trough.
  • the generic support devices have cut from sheet metal frames whose contour is adapted exactly to the curvature of the solar trough , For example, laser cut sheets are used for the frames. The production of these contour-accurate sheets is time-consuming and thus economically disadvantageous.
  • the invention aims to improve a generic support device to the effect that it can be created from the lowest possible cost items and this creation is possible as economically as possible in a short time.
  • the innovation proposes in other words, to adapt the frames not exactly the curvature of the solar trough, but rather to design the ribs similar to a polygon, so that this traverse follows the bend of the longitudinal trough, but from simple, inexpensive elements in the form of straight sections is formed.
  • the contour-accurate support of the solar trough is made by intermediate pieces, which rest on the one hand on a portion of this polygonal pull and on the other hand lie exactly contour of the solar trough.
  • the intermediate pieces can be punched, for example, and can therefore be produced in a large number of contours in a short time, or they can be milled precisely to the contour.
  • the intermediate pieces are made of plastic, the punching or milling operations can be performed at high speed and long life of the tools involved.
  • repeatable production of a large variety of spacers can be achieved that they are made for example as castings.
  • the sections of the ribs can advantageously be designed as rolled sections. These are standardized, commercially available profiles that can be procured economically and have defined properties that are essential for the manufacture of a scaffold, for example with regard to the flexural rigidity of the profiles.
  • the longitudinal struts are provided. These can be designed in a particularly economical embodiment, for example, as made of sheet metal edge profiles and advantageously have a substantially U-shaped or V-shaped cross-section, so that they have a high bending stiffness.
  • a central longitudinal strut can be provided, which is made larger or more stable than the other longitudinal struts.
  • This central longitudinal strut not only serves to support the solar trough, but to hold the solar trough together with the frames and longitudinal struts between the two floor supports. Therefore, this central longitudinal strut pivotally connects to the two floor supports, so that it allows the tracking of the solar trough in accordance with the changing position of the sun.
  • this central longitudinal strut is designed as a tubular profile, so that on the one hand a particularly high bending stiffness of this longitudinal strut can be ensured and also the longitudinal strut may possibly serve as a protective tube or cladding tube to protect lines inside the longitudinal. striving to be able to arrange, for example, electrical lines, which are provided for the mentioned tracking and thus pivoting mobility of the solar troughs.
  • the design of the support device as possible to save material and lightweight be carried out in that the curved extending frames are attached in the manner of a suspension bridge to holders. These holders connect the frames with pylons, each extending from a central longitudinal strut towards the central axis of the solar trough.
  • the pylons may serve, for example, to hold the absorber tube, or they may be provided in addition to the absorber tube only for holding the frames.
  • the support grid can be pivoted into a so-called protective position to protect the solar trough, for example during rainstorms, sand storms o. The like.
  • Optimum protection of the solar trough can be achieved in particular by the fact that the support grid can be pivoted so far that the solar trough is oriented downwards open. Depending on the local climatic conditions, it may even be possible to collect and condense moisture rising from the bottom of the downwardly oriented solar trough by this orientation of the solar trough, so that liquid dripping from the solar trough drips back to the ground or to a water collecting tank and there can be collected. In this way, irrigation for plants can be effected or at least supported if necessary, with the sunrises arranged above the ground shading the ground, so that plants may be protected there against excessive sunlight and - provided the appropriate irrigation - can thrive.
  • the floor supports may preferably have a recess into which the absorber tube dips.
  • a continuous absorber tube may be provided, which extends over the entire length of a plurality of axially successively arranged in series solar troughs, while at both ends of each solar trough each floor support is provided, the absorber tube extends further to the next solar trough. If all arranged in such a series solar troughs are pivoted at the same time and also swivel the absorber tube, the absorber tube dives into the mentioned recess of the floor supports one until the solar rollers are oriented with their opening facing down.
  • this mentioned recess of the floor supports can be achieved in that the floor supports have a floor upwardly extending, ie upright column, which is not vertical, but rather is oriented obliquely, so that between the imaginary vertical line and the actual Course of this column, a free space is created, which forms the recess into which the absorber tube can dive with appropriate pivoting position of the solar troughs.
  • FIG. 13 is a rear view of a portion of a parabolic trough power plant, with a support device and a solar trough held therein,
  • FIG. 14 shows the arrangement of FIG. 13 from the front
  • Fig. 15 is a front perspective view from a different perspective than
  • Fig. 16 is a side view, so seen in the longitudinal direction of the solar trough, on the
  • the support device 101 comprises floor supports 102, wherein in FIG. 13 three such floor supports 102 are shown, of which two floor supports 102 receive between them a solar trough 103 with a parabolic cross section, which is held on a support grid.
  • the support grid consists of a central longitudinal strut 104, wherein a plurality of ribs 105 extend transversely to the central longitudinal strut 104 and a plurality of longitudinal struts 106 parallel to the central longitudinal strut 104. While the central longitudinal strut 104 is formed by a square hollow profile, the longitudinal struts 106, as can be seen in particular from FIG. 16, are configured with an approximately U-shaped or V-shaped cross section.
  • intermediate pieces consist of folded sheets.
  • the design of the intermediate pieces can be seen neither from FIG. 16 nor from the other drawings.
  • two or more intermediate pieces may be arranged, which support the solar trough 103 only along a portion of its circumference.
  • the spacers may also be configured to abut or even extend along a bulkhead 105 almost along its entire length, or indeed its entire length, such that a single intermediate member extends the solar trough 103 along much or even all of its circumference supported their scope.
  • the ribs 105 consist of three straight sections 107, which are each designed as a double-T-beam in the form of simple, commercial rolled sections.
  • the floor supports 102 consist of such rolled profiles: They each have an upright, opposite the vertical inclined column 108 and a foot part 109, which can be firmly anchored to the ground.
  • pylons 110 are provided which extend from the central longitudinal strut 104 in the direction of the focal line of the solar channel 103. From the pylons 1 10 extend holder 1 1 1 to the frames 105, wherein in the illustrated embodiment, the frames 105 each consist of three sections 107 and the holder 1 1 1 of the pylons 1 10 each to the two outer portions 107 of the frames 105 run. The pylons 1 10 extend beyond the connection point of the holder 1 1 1 addition to the focal line of the solar trough 103, so that they can be used to hold an absorber tube, which is then in the focal line of the solar trough 103.
  • the absorber tube extends over the length of the illustrated solar trough 103 addition to the next solar trough 103, wherein a total of a variety of similar solar troughs 103 are arranged axially one behind the other, so that when the solar trough 103 is in the protective position, the portions of the absorber tube, which are located between two adjacent solar troughs 103, do not collide with the floor supports 102, but rather into the free spaces 12 of the floor supports 102 can dive.
  • FIGS. 17, 18, 19, 20 and 21 A particular embodiment of the invention, which can be used in conjunction with the already described features according to FIGS. 13-16, but also represents a separate solution according to the invention, is shown in FIGS. 17, 18, 19, 20 and 21.
  • FIG. 18 shows a parabolic trough element which can be assembled together with several elements to form a parabolic trough.
  • the element shown has a bent as a parabolic mirror plate made of cold bent glass, which has a thickness of about 2 to 4 mm, preferably 3mm and on the (seen from the sun) back silvered.
  • the frames 1 12 shown, which form the support structure for the mirrored glass, are made of metal, preferably of aluminum sheet (wide foot), and these frames form the support structure for the glass and the support structure is glued to the glass.
  • the adhesive is particularly preferably a polymer adhesive, silane, modified silicone-based polymer.
  • White glass is used as the glass, which has no green component, but is cured (but no ESG).
  • the distance of the ribs 1 12, which run parallel to each other, is to balance out carefully, on the one hand a sufficient strength To ensure the entire mirror construction, on the other hand, but not to increase the weight unnecessarily.
  • a distance of the ribs in the range of 30 to 40 cm, preferably 33 cm has been found.
  • the distance between the sections 107 to each other is to choose very carefully and in this case, a distance of 3.20 m has been found to be optimized, so that from a preferred distance of the elements of about 3 to 4 m, preferably 3.2 m can be assumed ,
  • the production of a mirror according to FIGS. 17 to 19 takes place in the following steps:
  • the mirrored glass is placed on a base 1 and brought into the desired (parabolic) shape due to its flexibility.
  • the frames 1 12 are glued. Thereafter, the preferably U- or V-shaped longitudinal struts 106 are laid transversely to the frames and connected to the frames, e.g. by screwing.
  • the individual adjacent frames of a mirror element at its outer edge by another support plate 120 are connected to each other, thus increasing the stability of the entire mirror, and thus also to form a stable frame for the mirror element.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Optics & Photonics (AREA)
  • Combustion & Propulsion (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

L'invention concerne un procédé de production d'un miroir façonné (F) qui présente une surface (2) incurvée d'une manière prédéterminée. Le procédé comprend les étapes consistant : - à former un corps façonné (1 ) dont une partie de la surface reproduit la surface incurvée d'une manière prédéterminée; - à appliquer une couche de verre, de manière complète et exempte de fente, sur la surface incurvée de manière prédéterminée du corps façonné, ladite couche de verre présentant une surface qui est située à l'opposé de la surface d'appui du corps façonné et sur laquelle est disposé un revêtement réfléchissant (4), et à appliquer une couche support (5) sur le revêtement réfléchissant, la couche support étant liée au revêtement réfléchissant et, une fois le miroir façonné séparé du corps façonné, la courbure prédéterminée étant conservée. Le procédé concerne également l'utilisation d'une couche métallique réfléchissante au lieu de la couche de verre aux fins de réflexion. L'invention concerne également un miroir façonné fabriqué selon ledit procédé, ainsi qu'un collecteur cylindro-parabolique pour une centrale solaire thermique qui utilise le miroir façonné.
EP10774147A 2009-10-01 2010-10-01 Procédé de production d'un miroir façonné, et collecteur cylindro-parabolique pour capteurs de chaleur solaire Withdrawn EP2483064A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009047945A DE102009047945A1 (de) 2009-10-01 2009-10-01 Verfahren zur Herstellung eines Formspiegels, Formspiegel und Parabolrinne für Solarkollektoren
PCT/EP2010/064698 WO2011039372A2 (fr) 2009-10-01 2010-10-01 Procédé de production d'un miroir façonné, et collecteur cylindro-parabolique pour capteurs de chaleur solaire

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EP2483064A2 true EP2483064A2 (fr) 2012-08-08

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EP (1) EP2483064A2 (fr)
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DE102010060091A1 (de) * 2010-10-20 2012-04-26 Thyssenkrupp Steel Europe Ag Stützvorrichtung eines gewölbten Spiegels
ITMI20110746A1 (it) * 2011-05-04 2012-11-05 En Rinnovabili Altern Ative Srl Fab Metodo per la produzione di specchi riflettenti e specchio riflettente cosi' ottenuto
CN102393085B (zh) * 2011-12-12 2013-10-16 中海阳新能源电力股份有限公司 太阳能光热槽式大开口双层抛物线高效集热器
CN103984049B (zh) * 2014-04-25 2017-01-18 吴砺 一种太阳能反射镜制作方法
US10488079B2 (en) 2014-05-13 2019-11-26 Massachusetts Institute Of Technology Low cost parabolic cylindrical trough for concentrated solar power
DE102015220476A1 (de) * 2015-10-21 2016-12-15 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren sowie Vorrichtung zur Herstellung eines Solarspiegelmoduls

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US4124277A (en) * 1977-02-16 1978-11-07 Martin Marietta Corporation Parabolic mirror construction
DE2738595C2 (de) * 1977-08-26 1984-12-13 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8000 München Reflektor für Sonnenkollektoren
DE2945908A1 (de) * 1979-11-14 1981-05-27 Dipl.-Ing. Helmut 8000 München Beutel Konzentrierter schichten-solarspiegel
US7077532B1 (en) * 2000-04-05 2006-07-18 Sandia Corporation Solar reflection panels
WO2003022578A1 (fr) * 2001-09-11 2003-03-20 The Australian National University Dispositif de concentration d'energie solaire et pieces auxiliaires dudit dispositif
US7871664B2 (en) * 2006-03-23 2011-01-18 Guardian Industries Corp. Parabolic trough or dish reflector for use in concentrating solar power apparatus and method of making same

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WO2011039372A3 (fr) 2011-07-21
WO2011039372A8 (fr) 2011-08-25
DE102009047945A1 (de) 2011-04-07
DE202010018255U1 (de) 2015-05-15
WO2011039372A2 (fr) 2011-04-07

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