CH599556A5 - Mfr. of parabolically curved mirror for focussing sunlight - Google Patents
Mfr. of parabolically curved mirror for focussing sunlightInfo
- Publication number
- CH599556A5 CH599556A5 CH1050576A CH1050576A CH599556A5 CH 599556 A5 CH599556 A5 CH 599556A5 CH 1050576 A CH1050576 A CH 1050576A CH 1050576 A CH1050576 A CH 1050576A CH 599556 A5 CH599556 A5 CH 599556A5
- Authority
- CH
- Switzerland
- Prior art keywords
- mirror
- state
- parabolic
- plastic
- rectangular
- Prior art date
Links
- 239000004033 plastic Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000002984 plastic foam Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 239000011541 reaction mixture Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000013039 cover film Substances 0.000 claims description 2
- 230000006866 deterioration Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/10—Mirrors with curved faces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/71—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Mfr. of parabolically curved mirror for focussing sunlight employs two rectangular and elastically flexible plates of different widths filled with liq. plastic material which sets hard
Description
Gegenstand vorliegender Erfindung ist ein Verfahren zum Herstellen eines um eine Längsbrennachse parabolisch gekrümmten Spiegels zum Fokussieren von Sonnenlicht in die Brennachse.
Bekannt ist es, rechteckige Glasplatten in warmem Zustand in die gewünschte parabolische Form zu biegen und anschliessend oder auch schon vorher zu verspiegeln. Das führt zu aufwendigen, zerstörungsanfälligen und deshalb unwirtschaftlichen Sonnenspiegel-Konstruktionen.
Die Erfindung bezieht sich auf das Problem, wie ohne wesentliche Verschlechterung der optischen Spiegelqualität die Herstellungskosten wesentlich verbilligt werden können und auch die Spiegelbruch-Gefahr vermieden werden kann.
Zur Lösung dieser Aufgabe ist erfindungsgemäss vorgesehen, dass zwei rechteckige, ungleich breite und elastisch biegsame Platten, von denen die schmälere verspiegelt ist, entlang ihren Längskanten kraftschlüssig miteinander verbunden werden und dass das dabei entstehende Zweikanten Gebilde mit der Spiegelfläche voraus auf mindestens eine parabolische Lehrfläche eines Formteiles lösbar aufgespannt, in diesem Zustand unter Abschliessung der Stirnöffnungen mit einem flüssigen, schäumfähigen und im Schaumzustand aushärtenden Kunststoff-Reaktionsgemisch ausgeschäumt und nach Aushärtung des Kunststoffschaumkernes vom Formteil abgenommen wird.
Als biegsame Platten bieten sich z. B. Metallplatten bzw.
-Bleche mit einer Dicke von etwa 0,5 bis 1,5 mm an, vorzugsweise solche aus Reinaluminium, die durch bekannte anodische Behandlungsverfahren anodisch geglänzt und oxydiert und damit zu hoher Güte verspiegelt werden können. Es ist aber auch denkbar, Verbundbauplatten, bestehend aus einer Kunststoff-Trägerplatte und einer metallischen, verspiegelbaren Metall-Deckfolie, zu verwenden.
Ausführungsbeispiele sind in der Zeichnung dargestellt.
Es zeigen:
Fig. 1, im Schnitt, einen Spiegel in einer ersten Phase des Herstellungsverfahrens und
Fig. 2, im Schnitt, Spiegel in einer zweiten Phase des Herstellungsverfahrens.
Gemäss den Fig. 1 und 2 dienen zwei axial voneinander distanzierte und aufeinander ausgerichtete Formteile TR' mit parabolisch gekrümmten Flanken nur als Lehr-Formteile und nicht als Stirnwände eines fertigen Sonnenspiegels. Zwei rechteckige, ungleich breite, elastisch biegsame Metallbleche SB und B, von denen das schmalere, SB, mit einer Spiegelschicht s versehen ist, sind in einer ersten Herstellungsphase gemäss Fig. 1 entlang ihren Längskanten durch Umbördelungen b und oder Verklebungen k kraftschlüssig miteinander verbunden worden. In der zweiten Herstellungsphase ist das Zweikantgebilde nach Fig. 1 an die Parabelfianken der Formteile TR' herangepresst und in der Lage nach Fig. 2 mittels Haltebügeln c lösbar befestigt worden.
Unter geeigneter Abschliessung der Stirnöffnungen ist der Hohlraum zwischen den Blechen SB und B mit aus dem flüssigen Zustand aufgeschäumtem und im Schaumzustand aushärtendem Kunststoffschaum KS gefüllt worden. Nach vollständiger Aushärtung dieses Kunststoff-Schaumkernes KS entsteht ein in sich formstabiler, aus den Blechen SB und B sowie dem Schaumkem bestehender Verbundbau-Parabol-Sonnenspiegel, der von den Formteilen TR' abgenommen werden kann. Ein solcher Spiegel ist zur Erhitzung eines flüssigen Wärmeträgers durch Sonnenwärme benützbar.
PATENTANSPRUCH
Verfahren zum Herstellen eines um eine Längsbrennachse parabolisch gekrümmten Spiegels zum Fokussieren von Sonnenlicht in die Brennachse, dadurch gekennzeichnet, dass zwei rechteckige, ungleich breite und elastisch biegsame Platten (SB, B) von denen die schmalere (SB) verspiegelt ist, entlang ihren Längskanten kraftschlüssig miteinander verbunden werden und dass das dabei entstehende Zweikantengebilde mit der Spiegelfläche (s) voraus auf mindestens eine parabolische Lehrfläche eines Formteiles (RT') lösbar aufgespannt, in diesem Zustand unter Abschliessung der Stirnöffnungen mit einem flüssigen, schäumfähigen und im Schaumzustand aushärtenden Kunststoff-Reaktionsgemisch ausgeschäumt und nach Aushärtung des Kunststoffschaumkernes (KS) vom Formteil (RT') abgenommen wird.
**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.
The present invention relates to a method for producing a mirror which is parabolically curved about a longitudinal focal axis for focusing sunlight into the focal axis.
It is known to bend rectangular glass plates in the warm state into the desired parabolic shape and then or also to mirror them beforehand. This leads to complex, damage-prone and therefore uneconomical sun mirror constructions.
The invention relates to the problem of how, without a significant deterioration in the optical mirror quality, the manufacturing costs can be substantially reduced and the risk of mirror breakage can also be avoided.
To solve this problem, the invention provides that two rectangular, unevenly wide and elastically flexible plates, of which the narrower is mirrored, are frictionally connected along their longitudinal edges and that the resulting two-edged structure with the mirror surface in front of at least one parabolic teaching surface of one Molded part clamped releasably, in this state with closure of the front openings with a liquid, foamable and in the foam state hardening plastic reaction mixture is foamed and is removed from the molded part after hardening of the plastic foam core.
As flexible plates z. B. metal plates or
- Sheets with a thickness of about 0.5 to 1.5 mm, preferably those made of pure aluminum, which can be anodically polished and oxidized by known anodic treatment processes and thus mirrored to a high quality. However, it is also conceivable to use composite construction panels consisting of a plastic carrier plate and a metallic, reflective metal cover film.
Exemplary embodiments are shown in the drawing.
Show it:
Fig. 1, in section, a mirror in a first phase of the manufacturing process and
Fig. 2, in section, mirror in a second phase of the manufacturing process.
According to FIGS. 1 and 2, two molded parts TR ′, axially spaced from one another and aligned with one another, with parabolically curved flanks serve only as teaching molded parts and not as end walls of a finished sun mirror. Two rectangular, unequal width, elastically flexible metal sheets SB and B, of which the narrower, SB, is provided with a mirror layer s, are frictionally connected to one another along their longitudinal edges by flanges b and / or adhesives k in a first manufacturing phase according to FIG . In the second manufacturing phase, the two-sided structure according to FIG. 1 is pressed against the parabolic fins of the molded parts TR 'and releasably fastened in the position according to FIG. 2 by means of retaining clips c.
With a suitable closure of the end openings, the cavity between the metal sheets SB and B has been filled with plastic foam KS which has been foamed from the liquid state and cures in the foam state. After this plastic foam core KS has fully cured, a composite parabolic solar mirror that is inherently stable and made of the sheets SB and B and the foam core and can be removed from the molded parts TR '. Such a mirror can be used to heat a liquid heat carrier using solar heat.
PATENT CLAIM
Method for producing a mirror parabolically curved around a longitudinal focal axis for focusing sunlight into the focal axis, characterized in that two rectangular, unequal width and elastically flexible plates (SB, B) of which the narrower (SB) is mirrored, frictionally along their longitudinal edges are connected to each other and that the resulting two-edged structure with the mirror surface (s) in front of at least one parabolic gauge surface of a molded part (RT ') is releasably stretched, in this state with a liquid, foamable and in the foam state hardening plastic reaction mixture is foamed with the end openings being closed off and after the plastic foam core (KS) has hardened, it is removed from the molded part (RT ').
** WARNING ** End of DESC field could overlap beginning of CLMS **.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1050576A CH599556A5 (en) | 1976-08-18 | 1976-08-18 | Mfr. of parabolically curved mirror for focussing sunlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1050576A CH599556A5 (en) | 1976-08-18 | 1976-08-18 | Mfr. of parabolically curved mirror for focussing sunlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH599556A5 true CH599556A5 (en) | 1978-05-31 |
Family
ID=4363943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1050576A CH599556A5 (en) | 1976-08-18 | 1976-08-18 | Mfr. of parabolically curved mirror for focussing sunlight |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH599556A5 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3641944A1 (en) * | 1986-12-09 | 1988-07-07 | Michael Prof Dipl I Schoenherr | Process for producing concave mirrors |
| GB2416831A (en) * | 2004-08-04 | 2006-02-08 | Patrick Gribbin | A Solar Water Heater |
| EP2500670A1 (en) * | 2011-03-14 | 2012-09-19 | Rioglass Solar, S.A. | Composite reflective element and method for the manufacture thereof |
-
1976
- 1976-08-18 CH CH1050576A patent/CH599556A5/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3641944A1 (en) * | 1986-12-09 | 1988-07-07 | Michael Prof Dipl I Schoenherr | Process for producing concave mirrors |
| GB2416831A (en) * | 2004-08-04 | 2006-02-08 | Patrick Gribbin | A Solar Water Heater |
| EP2500670A1 (en) * | 2011-03-14 | 2012-09-19 | Rioglass Solar, S.A. | Composite reflective element and method for the manufacture thereof |
| WO2012123611A3 (en) * | 2011-03-14 | 2013-04-04 | Rioglass Solar, S.A. | Reflector element and method and system for the production thereof |
| US9470821B2 (en) | 2011-03-14 | 2016-10-18 | Rioglass Solar, S.A. | Reflector element and method and system for the production thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |