Validation Study for Daylight Dynamic Metrics by Using Test Cells in Mediterranean Area

M. A. Campano, Department of Building Construction I, Universidad de Sevilla, Spain, I. Acosta, A. L. León, C. Calama
2018 International Journal of Engineering and Technology  
This paper presents the validation of two daylight dynamic predictive metrics, obtained through simulation with DaySim 3.2 tool: Daylight Autonomy (DA) and Continuous Daylight Autonomy (DAC). To that effect, a validation protocol is developed, in which the annual results of the predictive simulation model are compared to the illuminance values measured during a whole year into an existing test cell, located in Seville (Spain), which is used as a reference. After trials it was found that, for
more » ... ee illuminance thresholds of 100, 250 and 500 lux, the mean difference of daylight autonomy between measurements and dynamic simulations is lower of 2% with a standard deviation of 6.8%, and the mean difference for continuous daylight autonomy is 1.0% with a standard deviation of 4.9%. It is concluded that the use of these two metrics by calculation with DaySim tool is adequate for small-sized rooms with one window, located in the Mediterranean area. The exposed methodology allows to validate the use of these indicators in rooms with variable size, window size and location, so further investigation is required. Index Terms-Daylight autonomy, field experiments, energy saving, useful daylight illuminance, window. M. A. Campano is a professor at the Department of Building Construction I, University of Seville, Spain. He is a member of the research group TEP-130, which is focused on sustainability, energy efficiency, lighting, acoustics and optics related to building design and heritage refurbishment. He develops research on the field of energy efficiency, indoor environmental comfort and daylighting, as well as their relationship with the architectural design.
doi:10.7763/ijet.2018.v10.1107 fatcat:vxp3ok3gobfhjpvxrxr25554ti