[Back]

E.M. Vazifeh, M. Schuss, A. Mahdavi:
"An Empirically-Based Assessment of Computational Sky Luminance Distribution Models";
in: "Proceedings of the 14 IBPSA Conference", V Garg et al. (ed.); issued by: IBPSA; IBPSA, Hyderabad, India, 2015, Paper ID 2224, 5 pages.

Simulation can support the design and operation of buildings for optimal thermal and visual performance. Specifically, the design and configuration of building-integrated energy systems (solar-thermal collectors and photovoltaic panels) can be efficively supported via reliable computation of incident solar radiation. Toward this end, advanced building energy and lighting simulation programs adopt high-resolution sky models. The present contribution addresses the reliability of two such models based on long-term high-resolution data collected at the observatory of the Department of Building Physics and Building Ecology at TU Vienna, Austria. To evaluate the performance of the sky models, we compared simulated and measured vertical illuminance values as well as patch luminance values. The statistical appraisal of the comparison points to limits in the predictive accuracy of both models.

none - see english version