RT Journal Article
T1 Designing a flat beam-down linear Fresnel reflector
A1 Taramona Fernández, Sebastián
A1 González Gómez, Pedro Ángel
A1 Villa Briongos, Javier
A1 Gómez Hernández, Jesús
AB A linear beam-down solar field consists of two reflections that concentrate the solar irradiation on heavy materials located on the ground. Several rows of linear Fresnel reflectors, which have the same width, aim the solar irradiation to a secondary mirror with a hyperbolic shape that redirects the solar concentration towards the ground receiver. This paper overcomes the main limitation of the previously proposed hyperbolic secondary reflector. A new secondary reflector composed by several fixed flat mirrors located at the same height is proposed. A model to calculate the optimal layout of this novel solar field, as well as the efficiency and concentration, is developed and validated against a Monte-Carlo Ray-Tracing software, obtaining relative errors lower than 15%. Two new dimensionless parameters are proposed to facilitate the design of the flat beam-down linear Fresnel reflector. The concentration, optical efficiency and receiver width can be easily obtained, without performing any simulation, as a function of the dimensionless parameters. This novel solar field can achieve concentration ratios of up to 31 and optical efficiencies of up to 60%, obtaining similar concentrations with better optical efficiency than a field using a hyperbolic reflector.
PB Elsevier
SN 0960-1481
YR 2022
FD 2022-03-01
LK https://hdl.handle.net/10016/38487
UL https://hdl.handle.net/10016/38487
LA eng
NO The authors wish to thank the support for the research project INTECSOLARIS-CM-UC3M has been funded by the call "Programa de apoyo a la realización de proyectos interdisciplinares de I + D para jóvenes investigadores de la Universidad Carlos III de Madrid 2019-2020" under the frame of the "Convenio Plurianual Comunidad de Madrid - Universidad Carlos III de Madrid".The authors wish to thank "Comunidad de Madrid" for its support to the ACES2030-CM Project (S2018/EMT-4319) through the Program of R&D activities between research groups in Technologies 2018, co-financed by European Structural Funds.
DS e-Archivo
RD 30 jun. 2024