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Numerical flowline concentrator design in 3D
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Paper Abstract

Freeform optics has great potential for delivering highly effective solar concentrators and lighting systems, but in some cases it can be challenging to implement. A numerical method is described for calculating 3D flowline concentrator shapes in a way that provides complete freedom over the specification of arbitrary source and receiver objects. This lends the approach to a range of practical design problems involving asymmetric systems, non-lambertian and extended light sources. The method reproduces the hyperbolic and hyperparabolic concentrator geometries identified in the literature, operating close to the thermodynamic limit of concentration. A practical example is given in the optimisation of a secondary concentrator for a concentrator photovoltaic array receiving light from a field of heliostats. The secondary improves the overall capture efficiency of the photovoltaic receiver at noon, and is expected to deliver further improvement at other times of day.

Paper Details

Date Published: 9 September 2019
PDF: 11 pages
Proc. SPIE 11120, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI, 111200A (9 September 2019); doi: 10.1117/12.2526849
Show Author Affiliations
Alex G. Lehmann, The Univ. of New South Wales (Australia)
Nicholas Ekins-Daukes, The Univ. of New South Wales (Australia)
Mark Keevers, The Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 11120:
Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI
Roland Winston; Eli Yablonovitch, Editor(s)

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