Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Evaluation of daylighting strategies based on their embodied carbon emissions: a first methodological framework and case study

Nazanin Rezaei Oghazi 1,2, Thomas Jusselme 2, Marilyne Andersen 1
1 Laboratory of Integrated Performance in Design (LIPID), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland
2 Energy Institute, University of Applied Science of Western Switzerland (HEIA-FR, HES-SO), Fribourg, Switzerland

Abstract: The impact of daylighting strategies on a building’s carbon emissions have so far been assessed mostly based on the building’ s use phase and their resulting operational benefits, overlooking embodied carbon emissions of material production, construction, maintenance and end of life. This paper proposes a new methodological framework that combines different techniques including sensitivity analysis, target cascading and a method called Design Space Exploration. The framework was tested on a case study, namely the winning entry of Solar decathlon 2012, to evaluate daylighting strategies based on both daylight availability and embodied carbon emissions. . This study allowed to show through a formal process that while choices made on window head height, glazing type, interior surface reflectance and window-to-wall ratio (WWR) basically define daylight access potential, they only have a minor impact on embodied carbon emissions.
Keywords: daylight, carbon emissions, Design Space Exploration, early stages of design
Pages: 820 - 827