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Airborne Shape Measurement of Parabolic Trough Collector Fields

Prahl, Christoph and Stanicki , Badrudin and Hilgert, Christoph and Ulmer , Steffen and Röger, Marc (2011) Airborne Shape Measurement of Parabolic Trough Collector Fields. 17th SolarPACES Conference, 20. - 23. September 2011, granada, spain.

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Abstract

As the optical efficiency of the solar field has a high impact on the overall plant performance, qualification methods determining the geometrical accuracy of solar concentrator systems have gained high importance. However, it has not been possible yet to measure the geometrical accuracy of an entire solar field, resolving the relevant single characteristics like local mirror slope deviations, panel alignment and gravitational deformation. This paper describes the development and assessment of a measurement technique for the qualification of parabolic troughs based on the distant observer method called TARMES (Trough Absorber Reflection Measurement System). Instead of a stationary camera at ground level taking pictures of a turning collector, the new approach called QFly makes use of an airborne camera vehicle which allows a completely automated and fast measurement of all collectors under relevant operating conditions. The new approach was validated against a stationary TARMES and photogrammetric measurement to compare the deviations between the different methods and with the expectations of an uncertainty analysis. The absolute measurement uncertainty of QFly on a module level is around ± 0.1 milliradians.

Document Type:Conference or Workshop Item (Speech, Paper, Poster)
Title:Airborne Shape Measurement of Parabolic Trough Collector Fields
Authors:
AuthorsInstitution or Email of Authors
Prahl, Christophchristoph.prahl@dlr.de
Stanicki , BadrudinUNSPECIFIED
Hilgert, ChristophUNSPECIFIED
Ulmer , SteffenUNSPECIFIED
Röger, MarcUNSPECIFIED
Date:September 2011
Refereed publication:Yes
Status:Published
Keywords:Parabolic trough, optical performance, distant observer, deflectometry, mirror slope deviation
Event Title:17th SolarPACES Conference
Event Location:granada, spain
Event Type:international Conference
Event Dates:20. - 23. September 2011
Organizer:SolarPACES
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Qualifizierung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research
Deposited By: Christoph Prahl
Deposited On:15 Dec 2011 14:21
Last Modified:29 Jul 2013 10:46

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