用于西班牙工业供热的线性菲涅尔太阳能场的协议与实验现场反射率表征

Abstract Concentrating Solar Power (CSP) plants are generally placed in warm, arid or semi-arid regions with frequent dust and sand. Soiling inevitably hinders the plants’ performance. This paper deals with the experimental characterization of a 37 kW Linear Fresnel (LFR) solar field located in Valencia (Spain). The spectral reflectance has been measured with the reflectometer Devices & Services 15R-USB. A full protocol has been established to measure and characterize the mean solar field reflectance. A 3-month experimental campaign has been performed to quantify the effect of soiling. The results show that the reflectance generally follows a normal distribution in same rows of the solar field. The main factors obtained with a multifactor ANOVA test are the rows, facets and the number of weeks since the last cleaning. The average solar field reflectance dropped down to 82.5 % after 3 months with no rain. The mean soiling rate is 0.16 %/day. Measuring around one point per facet helps reach less than 1 % error in most soiling conditions. The same methodology will be soon extended to a 4.2 MW solar field located in a brewery industry.