Thermotropic overheating protection for façade-integrated solar thermal collectors

Katharina Resch-Fauster, Andreas Weber, Stefan Holper, Michael Grobbauer

Research output: Contribution to journalArticleResearchpeer-review

7 Citations (Scopus)

Abstract

The capability of thermotropic glazing to reduce stagnation temperatures in solar thermal collectors is evaluated in in-situ testing (south-façade of an office building). Therefore, a thermotropic formulation which is curable by sunlight and which exhibits both, excellent light-shielding characteristics (transmittance reduction by ~20%) and long-term stability is specifically designed. Application relevant overheating protection efficiency is given: absorber temperatures are reduced by up to 29 K in collector stagnation. Performance characteristics are not changed during the six month period of in-situ testing. The application demonstration emphasizes the high innovative capacity of thermotropic materials.
Original languageEnglish
Pages (from-to)39-47
JournalSolar energy materials and solar cells
Volume170
Publication statusPublished - 2017

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