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S. Dervishi, A. Mahdavi:
"A Model to Estimate Luminous Efficacy of Global Solar Radiation for All Sky Conditions";
Talk: CLIMA 2013 - 11th REHVA World Congress and the 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings, Prag, Tschechische Republik; 2013-06-16 - 2013-06-19; in: "CLIMA 2013 - 11th REHVA World Congress and the 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings", K. Kabele, M. Urban, K. Suchý, M. Lain (ed.); Society of Environmental Engineering (STP), 1/1/1 (2013), Paper ID 193, 10 pages.

This paper presents a new simple luminous efficacy model for global horizontal irradiance. The proposed luminous efficacy model involves, as the main influencing variable, the Clearness Factor, which is an original derivative from the Clearness Index. Two further variables are included in the model formulation. These are the Humidity Ratio and the solar altitude. Moreover, the model includes a location dependent variable, which may be derived from the latitude information. The paper includes the result of the statistical analysis of the relationship between the model predictions and the measured data. The results of this analysis display a good
agreement between predictions and measurements.

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daylight, irradiance; illuminance; global luminous efficacy, simulation