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- W4281656688 abstract "Off-axis incidence is inherent to sun tracking mirrors, named heliostats. Moreover, heliostat defocus takes place, provided that the focal length of the mirrors usually differs from their distance to the target. Defocus, along with high incidence angles, lead to astigmatic aberrations, that are overlooked by analytic functions based on convolution. This paper presents an analytic function on the image plane that reproduces these aberrations. As the reflection of the heliostat axes is non-orthogonal with defocus, the identification of the reflected axes plays a key role in the resulting model. In comparison with Monte Carlo Ray-Tracing, the model shows correlation coefficients above 90%, except at the tangential and sagittal foci, where the analytic function is indeterminate. An astigmatic parameter is provided to assess the model validity, which is complementary to UNIZAR at high incidence angles." @default.
- W4281656688 created "2022-06-13" @default.
- W4281656688 creator A5024812537 @default.
- W4281656688 date "2022-07-01" @default.
- W4281656688 modified "2023-09-30" @default.
- W4281656688 title "Analytic function for heliostat flux mapping with astigmatism and defocus" @default.
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- W4281656688 doi "https://doi.org/10.1016/j.solener.2022.05.045" @default.
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