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Beam-down linear Fresnel reflector: BDLFR

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URI: https://hdl.handle.net/10016/32354
ISSN: 0960-1481
DOI: https://doi.org/10.1016/j.renene.2019.07.017
UXXI: AR/0000025552
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Beam_RE_2020_ps.pdf (1.24 MB)
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2020-02
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Elsevier
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This paper presents a novel linear solar concentrating system named BDLFR, acronym of Beam-Down Linear Fresnel Reflector. A BDLFR system consists of a primary LFR array reflecting sunlight into a secondary hyperbolic -or elliptic- cylinder mirror that beams-downs reflected rays to its secondary focal line at ground level, where the receiver is placed. A model based on vector notation -and validated against SolTrace- predicts the optical behavior of BDLFR and generates layouts to avoid blockings. The edge ray approach is utilized to determine receiver aperture widths. As a function of beam-down curvature ratio, the BDLFR configurations that maximize solar collection are found out. Concentration ratios about 80 are reached with a tertiary re-concentrator (CPC) coupled to the receiver aperture.
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Beam-down curvature, Compound parabolic concentrator, Flux concentration, Layout optimization, Linear fresnel reflector, Optical efficiency
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Sánchez-González, A. & Gómez-Hernández, J. (2020). Beam-down linear Fresnel reflector: BDLFR. Renewable Energy, 146, pp. 802-815.
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