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contributor authorTobias März
contributor authorChristian Weber
contributor authorChristoph Prahl
contributor authorSteffen Ulmer
contributor authorStefan Wilbert
date accessioned2017-05-09T00:46:50Z
date available2017-05-09T00:46:50Z
date copyrightAugust, 2011
date issued2011
identifier issn0199-6231
identifier otherJSEEDO-28444#031022_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/147570
description abstractThe solar field is the major cost component of a solar thermal power plant and the optical quality of the concentrators has a significant impact on the field efficiency and thus on the performance of the power plant. Measuring slope deviations in the parabolic shape of the mirror panels in the accuracy and resolution required for these applications is a challenge as it is not required with the same characteristics in other industries. Photogrammetry and deflectometry are the two optical measurement methods that are typically used to measure this shape accuracy of mirror panels used in CSP applications. They have been compared and validated by measuring a typical mirror panel under optimal conditions. Additionally, a flat water surface has been measured as an absolute reference object using deflectometry. The remaining deviations between the results of both methods and to the reference object are discussed and possible sources of errors during the measurement are identified. A detailed error analysis is conducted for both methods and compared to the experimental findings. The results show that both methods allow for surface slope measurement with the necessary accuracy for present CSP applications and that among the two, deflectometry exhibits advantages in speed, measurement accuracy, and spatial resolution. However, for obtaining correct results several sources of errors have to be addressed appropriately during measurement and postprocessing.
publisherThe American Society of Mechanical Engineers (ASME)
titleValidation of Two Optical Measurement Methods for the Qualification of the Shape Accuracy of Mirror Panels for Concentrating Solar Systems
typeJournal Paper
journal volume133
journal issue3
journal titleJournal of Solar Energy Engineering
identifier doi10.1115/1.4004240
journal fristpage31022
identifier eissn1528-8986
keywordsPhotogrammetry
keywordsSolar energy
keywordsErrors
keywordsMirrors
keywordsShapes
keywordsOptical measurement AND Water
treeJournal of Solar Energy Engineering:;2011:;volume( 133 ):;issue: 003
contenttypeFulltext


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