Polymeric absorbers for flat plate collectors: Can venting provide adequate overheat protection?

Research output: Contribution to journalConference articlepeer-review

Abstract

Venting and evaporative cooling are modeled as possible techniques for protecting polymer absorbers in single-glazed, flat-plate solar collectors from exceeding the material temperature limit during dry stagnation. Four venting options are considered: I) venting above the absorber plate, II) venting below, III) dual venting, and IV) venting with evaporative cooling. Results indicate that in hot, sunny conditions, venting may not provide adequate cooling to lower the absorber temperature to the relative thermal index of the polymeric materials currently in use or under consideration for this application. Venting combined with evaporative cooling from a wetted pad directly beneath the absorber plate is identified as a potential method of overheat protection in hot, dry climates.

Original languageEnglish (US)
Pages (from-to)253-257
Number of pages5
JournalInternational Solar Energy Conference
DOIs
StatePublished - Dec 1 2005
EventSolar Engineering 2005 - Orlando, FL, United States
Duration: Aug 2 2005Aug 6 2005

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