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Natural and semi-natural field exposure testing and analysis, on optical degradation of a building integrated unglazed solar collector surface
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för inomhusmiljö. (Materialteknik)
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet. (Materialteknik)ORCID iD: 0000-0001-9076-0801
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet. (Materialteknik)
2008 (English)In: Materials and Structures, ISSN 1359-5997, E-ISSN 1871-6873, Vol. 41, no 6, p. 1057-1071Article in journal (Refereed) Published
Abstract [en]

Durability is of great importance when considering sustainable energy systems. In turn it lays emphasis on assessing performance over time of energy systems and components. This paper presents a study on optical degradation of a building-integrated Unglazed Solar Collector (USC) surface, by exposing USC specimens to a natural and semi-natural field exposure test. Particular interest is devoted to the semi-natural field exposure test method evaluation, and the degradation of optical properties. The study showed that about 11 months of field exposure testing did not cause any significant optical (total solar absorptance and IR emittance) or material (surface coating) degradation; although measurements revealed a decrease in specular reflectance as diffuse increased. It was likely due to surface pollution that predominantly consisted of quartz. The study also showed that it is possible to achieve a considerable increased moisture exposure on test surfaces (seminatural field exposure test), through a relatively simple cooling device (Direct-Air Peltier-Element) and rough control strategy.

Place, publisher, year, edition, pages
2008. Vol. 41, no 6, p. 1057-1071
Keyword [en]
Natural and semi-natural field exposure, Optical degradation, Unglazed solar collector
National Category
Building Technologies Materials Engineering
Identifiers
URN: urn:nbn:se:hig:diva-2734DOI: 10.1617/s11527-007-9306-1ISI: 000256434800006Scopus ID: 2-s2.0-44649195111OAI: oai:DiVA.org:hig-2734DiVA, id: diva2:119396
Available from: 2008-05-28 Created: 2008-05-28 Last updated: 2018-03-13Bibliographically approved

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Stojanovic, BojanAkander, JanEriksson, Bengt

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Ämnesavdelningen för inomhusmiljöÄmnesavdelningen för byggnadskvalitet
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