Numerical flowline concentrator design in 3D

Alex G. Lehmann; Nicholas Ekins-Daukes; Mark Keevers

doi:10.1117/12.2526849

9 September 2019 Numerical flowline concentrator design in 3D

Alex G. Lehmann, Nicholas Ekins-Daukes, Mark Keevers

Proceedings Volume 11120, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI; 111200A (2019) https://doi.org/10.1117/12.2526849
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Alex G. Lehmann, Nicholas Ekins-Daukes, and Mark Keevers "Numerical flowline concentrator design in 3D", Proc. SPIE 11120, Nonimaging Optics: Efficient Design for Illumination and Solar Concentration XVI, 111200A (9 September 2019); https://doi.org/10.1117/12.2526849

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