Condensation in glazed flat plate solar collectors

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aut.conference.typeOral Presentation - Paper Presentation
aut.researcherAnderson, Timothy
dc.contributor.authorAnderson, T
dc.date.accessioned2014-05-18T21:40:25Z
dc.date.available2014-05-18T21:40:25Z
dc.date.copyright2014-05-08
dc.date.issued2014-05-08
dc.description.abstractGlazed flat plate solar collectors offer a simple and cost effective approach to heating water. However, on clear nights solar collectors can transfer a significant amount of heat to the atmosphere by radiation. In areas with a cool climate and high relative humidity the radiation heat loss can lead to the temperature of the glazing often reaching the dew-point of the surrounding air, this leads to condensation developing on the glazing. If water condenses on the inside of the glazing and repeatedly drips onto the solar absorber this could lead to damage of the solar collector surface thus shortening its operating life. Also, the build-up of condensation on the glazing can lead to the growth of mould, is visually displeasing to the owner, and means energy must be “wasted” to evaporate the moisture during the following day. This study aims to develop the understanding of the role that condensation plays on collector performance, as well as addressing ways of minimising the impact it has. In doing so, it uses numerical modelling and experimental testing to determine the frequency of condensation in glazed flat plate solar water heaters under typical operating conditions. It shows that climatic factors including relative humidity, ambient temperature and wind speed determine the frequency of condensation for any given location. However, it also reveals that the frequency of condensation can be modified by altering the convection heat transfer coefficient inside the collector and by using low emissivity coatings on the glazing layer.
dc.identifier.citationSolar2014: The 52nd Annual Conference of the Australian Solar Council held at Melbourne Convention & Exhibition Centre, Melbourne, 2014-05-08 to 2014-05-09
dc.identifier.urihttps://hdl.handle.net/10292/7195
dc.publisherSolar 2014 Conference & Expo
dc.relation.urihttp://solarexhibition.com.au/wp-content/uploads/Solar_2014_Scientific-Research-Session_FINAL.pdf
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in (see Citation). The original publication is available at (see Publisher's Version).
dc.rights.accessrightsOpenAccess
dc.subjectSolar collector
dc.subjectCondensation
dc.subjectPerformance
dc.titleCondensation in glazed flat plate solar collectors
dc.typeConference Contribution
pubs.elements-id166950
pubs.organisational-data/AUT
pubs.organisational-data/AUT/Design & Creative Technologies
pubs.organisational-data/AUT/Design & Creative Technologies/School of Engineering
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