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Patent Searching and Data


Title:
COMPOSITE MATERIAL FOR A SOLAR COLLECTOR
Document Type and Number:
WIPO Patent Application WO/2019/145166
Kind Code:
A8
Abstract:
The invention relates to a composite material (V) comprising a carrier (1) made of aluminium, having an intermediate layer (2) disposed atop one side of the carrier (1) and having applied atop the intermediate layer (2) an optically active multilayer system (3) which comprises at least two dielectric and/or oxidic layers (4, 5), namely an upper layer (4) and a light-absorbing layer (5) disposed therebelow, wherein the upper layer (4) is a dielectric layer having a refractive index n ≤ 2.0 and wherein disposed immediately atop the intermediate layer (2) and below the at least two dielectric and/or oxidic layers (4, 5) is a metallic layer (6). In order to provide with little technological complexity such a composite material (V) with a particular suitability for absorbers of the low temperature range which has a low stagnation temperature coupled with high efficiency and long-term stability, it is proposed that the intermediate layer (2) and the optically active multilayer system (3) are selected in terms of their optical properties, and the layers (2, 4, 5, 6) are measured in such a way that at a solar absorption (a) of at least 92 percent the solar radiation in a wavelength range (λ) of 1500 nm to 5000 nm is reflected to an extent of not more than 20% to 35% and in a wavelength range (λ) of 5000 nm to 10 000 nm to an extent of 25% to 90%, wherein in the wavelength range (λ) of 5000 nm to 10 000 nm over the entire wavelength range (λ) there is a steady increase in a wavelength-dependent reflectivity (R) of the composite material (V) with wavelength (λ).

Inventors:
PEROS, Dimitrios (Radschläfe 31, Siegen, 57074, DE)
Application Number:
EP2019/050676
Publication Date:
October 10, 2019
Filing Date:
January 11, 2019
Export Citation:
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Assignee:
ALANOD GMBH & CO. KG (Egerstr. 12, Ennepetal, 58256, DE)
International Classes:
F24S40/50; F24S70/225
Attorney, Agent or Firm:
ZAPF, Christoph (Patent- und Rechtsanwälte Dr. Solf & Zapf, Schloßbleiche 20, Wuppertal, 42103, DE)
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