LAPSE:2023.35868
Published Article
LAPSE:2023.35868
Experimental Validation of Double Paraboloid Reflection for Obtaining Quasi-Homogeneous Distribution of Concentrated Solar Flux
May 24, 2023
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.
Keywords
Cassegrain reflector, double paraboloid reflection, optical modelling, ray tracing simulations, solar flux distribution
Suggested Citation
Domingos G, Pereira JCG, Rosa PAR, Rodríguez J, Rosa LG. Experimental Validation of Double Paraboloid Reflection for Obtaining Quasi-Homogeneous Distribution of Concentrated Solar Flux. (2023). LAPSE:2023.35868
Author Affiliations
Domingos G: IDMEC—Instituto de Engenharia Mecânica, Instituto Superior Técnico, University of Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Pereira JCG: Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal [ORCID]
Rosa PAR: IDMEC—Instituto de Engenharia Mecânica, Instituto Superior Técnico, University of Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal [ORCID]
Rodríguez J: CIEMAT—Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, PSA—Plataforma Solar de Almería, Apartado 22, 04200 Tabernas, Spain
Rosa LG: IDMEC—Instituto de Engenharia Mecânica, Instituto Superior Técnico, University of Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal [ORCID]
Journal Name
Energies
Volume
16
Issue
9
First Page
3927
Year
2023
Publication Date
2023-05-06
Published Version
ISSN
1996-1073
Version Comments
Original Submission
Other Meta
PII: en16093927, Publication Type: Journal Article
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LAPSE:2023.35868
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doi:10.3390/en16093927
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May 24, 2023
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May 24, 2023
 
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May 24, 2023
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Original Submitter
Calvin Tsay
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