Large Deformation Plate Bending with Application to Solar Collectors

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dc.contributor.author Watterson, PA
dc.contributor.author Savvides, N
dc.contributor.author Lovatt, HC
dc.contributor.editor Prasad, D
dc.contributor.editor Co-Chairs, MG
dc.date.accessioned 2010-05-28T10:01:09Z
dc.date.issued 2008-01
dc.identifier.citation Third International Solar Energy Society Conference - Asia-Pacific Region, Sydney, 2008, pp. 1 - 10
dc.identifier.isbn 978-0-646-50593-0
dc.identifier.other E1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/11001
dc.description.abstract In a typical trough solar collector, a reflective sheet is shaped by a set of ribs with parabolic cutouts. This paper proposes the alternative simple construction method of pushing a thin elastic plate inwards on opposite edges, allowing the plate to adopt its minimum bending energy shape. Analytical solutions are derived for the shape, parameterised by the tangent angle at the plate edges. The limiting shape for a small bend is shown to be a cosine, even up to 15o edge angle. For edge angle between 40o and 52o, the shape is remarkably close to a parabola, differing by less than 2% of the shape height. Measured profiles of a thin metal strip accurately follow the analytic curves see figure below. The ability of the shape to focus parallel light by reflection is assessed. For circular section collectors, the maximum concentration factor (trough width to collector diameter catching all reflected light) is 26 for edge angle 53o and the collector centre dropped by 0.163 of the trough width. For planar collectors, the maximum factor is not as high, only 8.2, achieved in the small bend limit with the collector well above the trough. The results are also relevant to solar trough collectors shaped by ribs, since minimum distortion between the ribs will be obtained by using edge compression and edge angles in the range around 35o 55o, to give a free shape which is close to parabolic, thus needing minimal tuning by the ribs
dc.publisher International Solar Energy Society
dc.subject NA
dc.subject NA
dc.title Large Deformation Plate Bending with Application to Solar Collectors
dc.type Conference Proceeding
dc.parent Third International Solar Energy Society Conference - Asia-Pacific Region, Sydney
dc.journal.number en_US
dc.publocation Freiburg, Germany en_US
dc.publocation Freiburg, Germany
dc.identifier.startpage 1 en_US
dc.identifier.endpage en_US
dc.identifier.endpage 10 en_US
dc.cauo.name FEIT.School of Elec, Mech and Mechatronic Systems en_US
dc.conference Verified OK en_US
dc.conference International Solar Energy Society Conference
dc.for 0914 Resources Engineering and Extractive Metallurgy
dc.personcode 900329 en_US
dc.personcode 0000059235 en_US
dc.personcode 0000059234 en_US
dc.percentage 100 en_US
dc.classification.name Other Technology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom International Solar Energy Society Conference en_US
dc.date.activity 20081125 en_US
dc.date.activity 2008-11-25
dc.location.activity Sydney, Australia en_US
dc.location.activity Sydney, Australia
dc.description.keywords NA en_US
dc.description.keywords NA
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group /University of Technology Sydney/Faculty of Engineering and Information Technology/School of Elec, Mech and Mechatronic Systems
pubs.organisational-group /University of Technology Sydney/Strength - Health Technologies


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