13 - Forecasting and nowcasting of DNI for concentrating solar thermal systems

Abstract

This chapter reviews the state of the art of forecasting and nowcasting of direct normal irradiance (DNI) for concentrating solar thermal (CST) systems. After a review of the main methodologies involved in solar radiation forecasting, specific considerations for CST plants have been taken into account. Before highlighting the main challenges in DNI forecasting, the baseline of solar radiation is presented showing a review of benchmarking exercises. Most of this comparison exercises are based on global horizontal irradiance. Some review articles as well as selected works dealing specifically with DNI and solar thermal power plants have also been discussed.