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Use of a Peltier Element to Increase Time of Wetness of Unglazed Solar Collector Specimens in a Natural Field Exposure Test
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet. (Materialteknik)
University of Gävle, Department of Technology and Built Environment, Ämnesavdelningen för byggnadskvalitet. (Materialteknik)ORCID iD: 0000-0001-9076-0801
2008 (English)In: Durability of Building Materials & Components 11 (11DBMC), Istanbul, Turkey, 11-14 May 2008, 2008, 1169-1175 p.Conference paper, Published paper (Refereed)
Abstract [en]

In accelerated testing, material specimens are exposed to completely artificial environments, where exposure to individual degradation agents is enhanced. In contrast, field-testing exposes specimens to multiple degradation agents. When performing a semi-natural test, the influence of a selected degradation agent may be increased while the specimen is still situated in its natural environment. Moisture is such an agent. In an experimental set-up for evaluating long-term optical performance of an building integrated Unglazed Solar Collector, a sub-task was to increase Time of Wetness (TOW) for several collector specimens for two reasons: to “simulate” an active cooling of the component as is the case for solar collectors; and to assess the role of TOW on optical degradation of the solar collector. Specimen cooling and increase in TOW was achieved by utilisation of a Direct-Air Peltier Element. TOW was estimated through measurements with WETCORR sensors (monitoring surface temperatures and moisture) and climate parameters (temperature and relative humidity) at site. At this particular test site in Gävle, Sweden, TOW was more than doubled in comparison to non-cooled surfaces. The Peltier Element proved to be inexpensive and flexible for this purpose.

Place, publisher, year, edition, pages
2008. 1169-1175 p.
Keyword [en]
Peltier Element, time of wetness, semi-natural environment, optical durability.
National Category
Building Technologies Other Materials Engineering
Identifiers
URN: urn:nbn:se:hig:diva-1773ISBN: 978-975-561-328-4 (print)OAI: oai:DiVA.org:hig-1773DiVA: diva2:118435
Conference
11DBMC, Istanbul, Turkey, 11-14 May 2008
Available from: 2008-05-22 Created: 2008-05-22 Last updated: 2017-01-02Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard-cite-them-right
  • ieee
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Language
  • sv-SE
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