PREDICTION AND VALIDATION OF CLOUDLESS SHORTWAVE IRRADIANCE SPECTRA FOR HORIZONTAL, TILTED, OR TRACKING RECEIVERS

摘要

The SMARTS spectral model can advantageously be used to predict clear-sky irradiance spectra on surfaces of any tilt and orientation, e.g., for the simulation of spectrally-selective technologies. To evaluate the intrinsic accuracy of the model, its current version undergoes here a sophisticated three-step validation exercise, involving reference radiative transfer codes, and two series of sophisticated spectral and ancillary measurements performed at different locations. Provided that the most important inputs are known with sufficient accuracy, it is concluded that the model performance is very high, with typical differences of 1-2% when compared to reference models, and uncertainties largely within the overall experimental error when compared to spectroradiometric measurements.