000260407 001__ 260407
000260407 005__ 20190619220053.0
000260407 0247_ $$a10.1115/1.4042227$$2doi
000260407 022__ $$a0199-6231
000260407 022__ $$a1528-8986
000260407 037__ $$aARTICLE
000260407 245__ $$aInverse Analysis of Radiative Flux Maps for the Characterization of High Flux Sources
000260407 260__ $$c2019
000260407 269__ $$a2019
000260407 336__ $$aJournal Articles
000260407 520__ $$aThe reconstruction of the angular and spatial intensity distribution from radiative flux maps measured in high flux solar simulators or optical concentrators is an ill-posed inverse problem requiring special solution strategies. We aimed at providing a solution strategy for the determination of intensity distributions of arbitrarily complicated concentrating facilities. The approach consists of the inverse reconstruction of the intensities from multiple radiative flux maps recorded at various positions around the focal plane. The approach was validated by three test cases including uniform spatial, Gaussian spatial, and uniform angular distribution for which we successfully predicted the intensity for a square-shaped target with edge length of 0.5 m and for a displacement range spanning 10 cm at a resolution of 3.2·106 elements, yielding relative errors between 19.8 – 26.4% and 15.7 – 25.6% when using Tikhonov regularization and the conjugate gradient least square method, respectively. The latter method showed superior performance and was used at a resolution of 20·106 elements to analyze EPFL’s high flux solar simulator comprising 18 lamps. The inverse solution for a single lamp retrieved from experimentally measured and simulated radiative flux maps showed peak intensities of 13.7 MW/m2/sr and 16.0 MW/m2/sr, respectively, with a relative error of 81.1%. The inverse reconstruction of the entire simulator by superimposing the single lamp intensities retrieved from simulated flux maps resulted in a maximum intensity of 18.8 MW/m2/sr with a relative error of 80%. The inverse method proved to provide reasonable intensity predictions with limited resolution of details imposed by the high gradients in the radiative flux maps.
000260407 700__ $$g275847$$aSuter, Clemens Gregor$$0250404
000260407 700__ $$aMeouchi Torbey, Antoine
000260407 700__ $$g253760$$aLevêque, Gaël Jean Clément$$0248685
000260407 700__ $$0247143$$aHaussener, Sophia$$g207354
000260407 773__ $$tJournal of Solar Energy Engineering$$j141$$k2$$q021011
000260407 8560_ $$fsophia.haussener@epfl.ch
000260407 909C0 $$pLRESE$$msophia.haussener@epfl.ch$$0252472$$xU12656
000260407 909CO $$pSTI$$particle$$ooai:infoscience.epfl.ch:260407
000260407 960__ $$asophia.haussener@epfl.ch
000260407 961__ $$apierre.devaud@epfl.ch
000260407 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000260407 980__ $$aARTICLE
000260407 981__ $$aoverwrite