Beam-down linear Fresnel reflector: BDLFR

RENEWABLE ENERGY

卷:146

Article

Sanchez-Gonzalez, Alberto¹  Gomez-Hernandez, Jesus¹ 

[1] Univ Carlos III Madrid, Energy Syst Engn Grp ISE, Dept Thermal & Fluid Engn, Av Univ 30, Madrid 28911, Spain

关键词: Linear fresnel reflector;    Beam-down curvature;    Flux concentration;    Optical efficiency;    Layout optimization;    Compound parabolic concentrator;   

DOI  :  10.1016/j.renene.2019.07.017

来源: Elsevier

【 摘 要 】

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. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

Free