Statistics – Computation
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8413128r&link_type=abstract
Presented at the 8th Natl. Passive Solar Conf., Santa Fe, N.Mex., 7-9 Sep. 1983
Statistics
Computation
Cloud Cover, Illuminance, Insolation, Reflectance, Sky Brightness, Daytime, Forecasting, Graphs (Charts)
Scientific paper
An extension of the daylight factor method of analysis that includes a graphical method for determining interflected light in clear climates is presented. The interflected component of daylight, called the internal reflectance component (IRC), was determined for overcast skies in research performed in the United Kingdom. The technique developed by the Building Research Establishment in the United Kingdom is based on determining an average IRC for a given room or space. Using a daylight availability model developed at SERI, a similar average IRC analysis technique is established for clear skies. The results of applying the SERI daylight availability model suggest that a critical element in determining the IRC under clear sky conditions is the ratio of global to diffuse (G/d) illuminance on a horizontal surface. This graphical technique for determining clear sky IRC values is expected to enhance the accuracy of daylighting system design by simplifying the format used in clear sky computation.
Hunter K. C.
Robbins C. L.
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