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- Title
Experimental Validation of Double Paraboloid Reflection for Obtaining Quasi-Homogeneous Distribution of Concentrated Solar Flux.
- Authors
Domingos, Gonçalo; Pereira, José Carlos Garcia; Rosa, Pedro Alexandre Rodrigues; Rodríguez, José; Rosa, Luís Guerra
- Abstract
This work demonstrates that the quasi-homogeneous distribution of concentrated solar flux is achievable by using double paraboloid reflection, with a primary reflector to concentrate the sunlight, and a secondary reflector to homogenise the radiation flux. For that, three slightly different secondary reflectors were designed and manufactured, matching the specifications of the paraboloid concentrator of the SF60 solar furnace located in PSA—Plataforma Solar de Almería, which was used as primary reflector. Starting from preliminary simulations of the optical apparatus, the secondary geometries were selected and then the reflectors were manufactured from 7075-T6 aluminium alloy, using conventional and CNC machining technologies, with further processing to achieve a mirror-like finish. The results obtained from solar irradiation tests corroborate that the "double paraboloid reflection" methodology proposed in previous theoretical works seems to be technically feasible and can be a solution for obtaining homogeneously distributed fluxes of highly concentrated solar radiation.
- Subjects
PARABOLOID; SOLAR concentrators; ALUMINUM alloys; SOLAR radiation; NUMERICAL control of machine tools; RAY tracing
- Publication
Energies (19961073), 2023, Vol 16, Issue 9, p3927
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en16093927