Development of a new method to estimate the incident solar flux on central receivers from deteriorated heliostats

RENEWABLE ENERGY

卷:130

Article

Rodriguez-Sanchez, M. R.¹  Leray, C.²  Toutant, A.^2,3  Ferriere, A.²  Olalde, G.² 

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

[2] CNRS, UPR 8521, Lab PROc Mat Energie Solaire PROMES, 7 Rue Four Solaire, F-66120 Odeillo Font Romeu, France

[3] Univ Perpignan, Via Domitia,52 Ave Paul Alduy, F-66860 Perpignan, France

关键词: Solar power tower;    Heliostat;    Incident solar flux;    Digital image analysis;   

DOI  :  10.1016/j.renene.2018.06.056

来源: Elsevier

【 摘 要 】

This work proposes a new empirical direct methodology to estimate both the solar flux distribution and intensity on the surface of central receivers. In solar power tower plants with deteriorated heliostats, the numerical simulations to estimate the incident solar flux are not precise. Hence the thermal behaviour of the receivers cannot be determined. In those cases, direct measurement or semi-empirical methodologies are required to characterize the radiant power on the receiver. The new methodology proposed, named Superposition method, consists in the hourly characterization of the reflected solar beam of each individual heliostat by means of a pyrheliometer, a passive screen, a flux sensor, a camera and digital image analysis. According to the aiming strategy used during receiver operation, each individual solar flux distribution and intensity can be gathered to obtain the total incident radiant power on the solar receiver. This non-real-time method has the advantage of reproducing any solar flux distribution on the receiver at present and past time. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free