Model for illuminance on horizontal and vertical surfaces

Details Model for illuminance on horizontal and vertical surfaces Model for illuminance on horizontal and vertical surfaces

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8413127r&link_type=abstract

Unknown

Mathematics

Logic

Cloud Cover, Illuminance, Insolation, Sky Brightness, Atmospheric Models, Daytime, Meteorological Parameters, Turbidity

Scientific paper

The Robbins-Hunter model for determining illuminance on horizontal and vertical surfaces is presented. It is compared with a wide range of other models designed for the same purpose, and all the models are compared with measurements made at the daylighting laboratory. The model uses simple algebraic expressions, and the inputs to the model are from Typical Meteorological Year (TMY) and Estimated Typical Meteorological Year (ETMY) weather data. This enables the model to be applied to all 247 cities in the TMY and ETMY weather station network. All of the models provide results that vary with measured data. Models that consider atmospheric moisture (turbidity) seem to be more accurate than those that do not. The Robbins-Hunter model agrees most closely with measured illuminance under all conditions of turbidity and cloud cover.

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