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Optical properties, durability, and system aspects of a new aluminium-polymer-laminated steel reflector for solar concentrators
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- Brogren, M (author)
- Uppsala universitet,Fasta tillståndets fysik
- Helgesson, A (author)
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- Karlsson, Björn (author)
- Lund University,Lunds universitet,Avdelningen för Energi och byggnadsdesign,Institutionen för bygg- och miljöteknologi,Institutioner vid LTH,Lunds Tekniska Högskola,Division of Energy and Building Design,Department of Building and Environmental Technology,Departments at LTH,Faculty of Engineering, LTH
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- (creator_code:org_t)
- Elsevier BV, 2004
- 2004
- English.
- In: Solar Energy Materials and Solar Cells. - : Elsevier BV. - 0927-0248 .- 1879-3398. ; 82:3, s. 387-412
- Journal article (peer-reviewed)
Abstract
Subject headings
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- A newly developed aluminium-polymer-laminated steel reflector for use in solar concentrators was evaluated with respect to its optical properties, durability, and reflector performance in solar thermal and photovoltaic systems. The optical properties of the reflector material were investigated using spectrophotometer and scatterometry. The durability of the reflector was tested in a climatic test chamber as well as outdoors in Alvkarleby (60.5degreesN, 17.4degreesE), Sweden. Before ageing, the solar weighted total and specular reflectance values were 82% and 77%, respectively, and the reflector scattered light isotropically. After I year's outdoor exposure, the total and specular solar reflectance had decreased by less than 11%. However, after 2000 h in damp heat and 1000 W/m(2) simulated solar radiation, the optical properties had changed significantly: The light scattering was anisotropic and the total and specular solar reflectance values had decreased to 75% and 42%, respectively. The decrease was found to be due to degradation of the protective polyethylene terephthalate (PET) layer, caused by UV radiation and high temperature. The conclusions are that the degradation is climate dependent and that PET is not suitable as a protective coating under extreme conditions, such as those in the climatic test chamber. However, the results from outdoor testing indicate that the material withstands exposure in a normal Swedish climate.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Husbyggnad (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Building Technologies (hsv//eng)
Keyword
- durability
- accelerated ageing
- optical properties
- solar concentrators
- reflector materials
Publication and Content Type
- art (subject category)
- ref (subject category)
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- Brogren, M
- Helgesson, A
- Karlsson, Björn
- Nilsson, Johan
- Roos, Arne
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