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Val, Carlos and Brotas, Luisa (2014) Daylighting and LENI calculations. In: 4th Masters Conference: People and Buildings, 19 September 2014, London, UK.
This paper addresses a recent lighting methodology, defined in the European Norm 15193, that adopts the calculation LENI - Light Energy numeric indicator - as a standard/comprehensive calculation method and in its implementation (simplified method) in the latest British Building Regulations Part L: Conservation of fuel and power, which came into force on April 2014. A sensitivity study is presented for a typical open plan office, for three different opening sizes and three different artificial lighting solutions. Moreover the model is assessed for 7 different locations across Europe. Results obtained from these calculations, are checked against advanced daylight simulation software which takes into consideration the potential of sunlight availability for energy savings with climate based daylight metrics based on real sky conditions available at the building site throughout the year.
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