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Campano, M. A.; Acosta, I.; León, A.L.; Calama, C. (2018). Validation study for daylight dynamic metrics by using test cells in Mediterranean area

REVISTA: International Journal of Engineering and Technology 10(6), 487-491.
IMPACTO: SJR (2017): 0,177. ENGINEERING (MISCELLANEOUS), Q3 (258/544)
DOI: 10.7763/IJET.2018.V10.1107

ABSTRACT:

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 three 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.