The Daylight factor is internationally recognized as the synthetic parameter to relate indoor visual task lighting requirements and daylight availability. Nevertheless, problems related within its static nature and the absence of connection with environmental parameters and geographic location, have been repeatedly highlighted in the literature. From an energy point of view, it is used in the European standard EN 15193:2008 for evaluating daylight penetration in buildings. Standard sky for D calculation (Overcast sky) has been defined as the most conservative, and from an energy point of view, this is very useful because represents the condition of peak energy consumption for artificial lighting. The aim of this study is to verify if D calculated under other sky conditions could be more conservative from an energy point of view. Whenever this case would occur, in order to keep results on the safe side, appropriate corrections should be applied to the D in the EN 15193:2008.

On the Validity of Daylight Factor for Evaluating the Energy Performance of Building / Mangione, A.; Mattoni, B.; Bisegna, F.; Iatauro, D.; Zinzi, M.. - (2018), pp. 1-4. ((Intervento presentato al convegno 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe, EEEIC/I and CPS Europe 2018 tenutosi a Palermo, ITALY [10.1109/EEEIC.2018.8494450].

On the Validity of Daylight Factor for Evaluating the Energy Performance of Building

Mangione A.;Mattoni B.;Bisegna F.;
2018

Abstract

The Daylight factor is internationally recognized as the synthetic parameter to relate indoor visual task lighting requirements and daylight availability. Nevertheless, problems related within its static nature and the absence of connection with environmental parameters and geographic location, have been repeatedly highlighted in the literature. From an energy point of view, it is used in the European standard EN 15193:2008 for evaluating daylight penetration in buildings. Standard sky for D calculation (Overcast sky) has been defined as the most conservative, and from an energy point of view, this is very useful because represents the condition of peak energy consumption for artificial lighting. The aim of this study is to verify if D calculated under other sky conditions could be more conservative from an energy point of view. Whenever this case would occur, in order to keep results on the safe side, appropriate corrections should be applied to the D in the EN 15193:2008.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11573/1274974
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