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E.M. Vazifeh, M. Schuss, A. Mahdavi:
"Development and evaluation of models for the computation of sky radiance and lumincane distribution";
Talk: ECPPM 2014 eWork and eBusiness in Architecture, Engineering and Construction, Wien, Österreich; 2014-09-17 - 2014-09-19; in: "Proceedings of the 10th European Conference on Product and Process Modelling (ECPPM2014), Vienna, Austria, 17-19 September 2014", A. Mahdavi, B. Martens, R.J. Scherer (ed.); Taylor & Francis - Balkema, 1/1/Boca Raton|London|New York|Leiden (2014), ISBN: 978-1-138-02710-7; 237 - 242.

There exist a number of sky radiance and luminance distribution models. Some of these models have been integrated in both weather data repositories and libraries of simulation applications. However, our past research implies that the existing models still fall short of meeting expectations. A comparison of a number of existing models for prevailing sky conditions in Vienna, Austria did not produce convincing evidence of the accuracy of these models. In the present study, we used a rich data set of high-resolution measurements of sky radiance (using the sky scanner data for 2011 obtained from monitoring station of the Building Physics and Building Ecology Department of the Vienna University of Technology, Austria) to explore the potential for models that would support the generation of detailed sky radiance and luminance models based on standard weather station data. Thereby, we focused on clear sky conditions. The derived empirically-based model could be shown to perform reasonably well. However, sky radiance prediction errors increasing patch altitudes. The paper concludes with discussion of the results and potential directions of future research.

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