AN EXTERIOR ILLUMINANCE PREDICTIVE MODEL FOR CLEAR SKIES IN MIDWESTERN ARGENTINA

Accurate assessment of the daylighting resource is essential for a pro per design of naturally lit architectural spaces. Many regions of the world, including those of South America, do not yet possess recorded d ata of exterior illuminance, predictive analytical models being the on ly available tool for such assessment. Several models were studied com paratively before developing the one presented in this paper. It was d esigned aiming at the inclusion of variables that precisely define the local atmospheric conditions and the albedo, thus allowing for its ge neralised applicability, in conjuction with the solar position as defi ned by latitude, Julian day and solar time.