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- W2972869063 abstract "The pragmatic virtues of ground-level receivers in solar towers have long been recognized, but the associated beam-down optics <i>reduce</i> concentration, resulting in higher heat loss and cost, or the need for an actively-cooled tertiary concentrator that incurs additional optical losses. Here, we describe the concept of an aplanatic beam-down solar tower, where concentration can be increased without the need for a tertiary concentrator, while retaining a ground-level receiver. The basis for satisfying aplanatism constitutes tailoring the contour of a stationary secondary mirror atop the tower with a distinct heliostat tracking strategy. Conflating the aplanatic solar tower with the option of multiple towers, where a heliostat can be aimed at different targets depending on solar geometry, can markedly reduce shading, blocking and cosine losses. Also, a system of many mini-towers each of which is only a few meters in height could enable systems that are more modular, efficient and easily-maintained." @default.
- W2972869063 created "2019-09-19" @default.
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- W2972869063 date "2019-09-09" @default.
- W2972869063 modified "2023-09-25" @default.
- W2972869063 title "Aplanatic beam-down solar towers" @default.
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- W2972869063 doi "https://doi.org/10.1117/12.2525231" @default.
- W2972869063 hasPublicationYear "2019" @default.
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