Measurement, comparison and monitoring of solar mirror's specular reflectivity using two different Reflectometers

Results show that during the dry period, soiling presents an important issue for CSP power plants in Eastern Morocco, where the weekly reflectance drop can reach 30%. Furthermore, the accuracy of the reflectivity measurements and the selection of the most adequate reflectometer have an important influence on the estimation of the solar field's optical efficiency, thus, on the electricity production.