The effect of glass on the receiver and the use of two absorber tubes on optical performance of linear fresnel solar concentrators

Hani Beltagy

Energy, 2021, vol. 224, issue C

Abstract: The optical analysis of any reflector of sunrays is a major task, because it is never easy to predict the quantity and the quality of the solar flux radiation falling on a receiver. Two algorithms can be used for the calculation of the flux distribution and thus temperatures in the receiver, namely, the Ray-Tracing and cones optics methods. We propose for the optics of the Fresnel concentrator a modeling and numerical simulation of the optical performances of Fresnel’s type solar field based on Monte Carlo ray-tracing (MCRT). This article presents an optical optimization of a solar prototype with Fresnel type concentration. This optimization was carried out through a parametric study, and a dimensioning calculation to determine the influence of each parameter on performance i.e the impact of the glass and the impact of the geometry of the receiver. The analysis of the results presented in the form of tables and curves allowed us to determine the optimal configuration of our solar prototype. This configuration gives better theoretical and experimental performances. On the basis of this optimal configuration, several thermal power stations based on LFR technology have been built and marketed. As well, several numerical models have been verified and validated through the usage of highly developed and very reliable measuring instruments. The removal of the glass resulted in an estimated gain in annual optical efficiency of 5.6% (from 40.49% to 42.75%). The use of two absorber tubes resulted in an annual gain in optical efficiency estimated at 15.5% (from 40.49 to 46.79%).

Keywords: Concentrating solar power; Solar concentration; Fresnel concentrator; Optical optimization; Optical performance; Ray tracing technique (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:224:y:2021:i:c:s0360544221003601

DOI: 10.1016/j.energy.2021.120111

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