Statistical assessment of a model for global illuminance on inclined surfaces from horizontal global illuminance

摘要: Olmo et al. [Energy 24 (1999) 689] have recently proposed a simple model to estimate global irradiance on inclined planes, which only requires the horizontal and sun elevation azimuth as input parameters. From now on, this will be referred model. Statistical assessment of can considered important, taking into account that available models for estimation or illuminance an surface require information global, direct diffuse surface. The version is tested in present work using mean 15 min values obtained with 20 sensors different slopes (zenith angles) azimuths. were placed spherical dome located at one corners roof experimental site ground shielded by black mat painted honeycomb material. Assuming value albedo 0% RMSD go from about 8% 12° 30% vertical facing east. For north surface, receiving mostly illuminance, 52% RMSD. 5%, too high our set up, similar results are obtained. In general over estimates surfaces Madrid, higher than 60 klux.