Optical Benchmarking of a Novel Polar Bi-Focal Beam-Down Tower Concept
DOI:
https://doi.org/10.52825/solarpaces.v2i.893Keywords:
Central Receiver Solar Tower, Beam-Down, Bi-FocusAbstract
Small-scale modular CSP systems using polar heliostat field arrangements reduce cosine losses significantly and – by integrating a secondary beam-down reflector – enable novel receiver concepts. A novel polar bi-focal beam-down design is introduced and its optical performance is assessed with ray tracing. Albeit not fully optimized, results show that – in comparison to a single-focus beam-down system – the bi-focal system entails higher annual, DNI-weighted optical efficiency and flatter circadian profiles, beneficial for reducing peak dumping. Even higher optical performances can be reached by combining single-focus and bi-focus systems.
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Copyright (c) 2024 Peter Schöttl, Gregor Bern, Francisco Torres
This work is licensed under a Creative Commons Attribution 4.0 International License.
Accepted 2024-07-10
Published 2024-09-16
Funding data
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Bundesministerium für Wirtschaft und Klimaschutz
Grant numbers 03EE5083A
