Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Life cycle efficiency of solar shading systems: a proof-of-concept

Nazanin Rezaei Oghazi 1,2, Thomas Jusselme 1, Elise Barri 1, Sergi Aguacil Moreno 3, Marilyne Andersen 2
1 Energy Institute, University of Applied Science of Western Switzerland (HEIA-FR, HES-SO), Fribourg, Switzerland

2 Laboratory of Integrated Performance in Design (LIPID), EPFL Lausanne, Switzerland
3 Building2050 group, Ecole polytechnique fédérale de Lausanne (EPFL), Fribourg, Switzerland

Abstract: Solar control strategies are essential for the glare control and decreasing cooling needs or overheating risks (in the absence of active cooling system), however, they come with their own embodied energy. With the carbon neutrality objective looking at the 2050 horizon, life-cycle assessment (LCA) approach is needed to evaluate the impact of decisions made on the different building components, including solar shading systems. To that end, this paper applies a relatively new concept defined as the Life-Cycle Efficiency Ratio (LCER) to quantify the trade-off between operational and embodied energy. Results based on a low-carbon case study suggests that adding solar shadings does not reduce the life cycle carbon emissions of this project. Also, analyses show that the ratio between operational benefits and embodied impacts of external fabric blind is the highest, while this ratio is the lowest for the internal fabric blinds in this case study.
Keywords: solar control, life cycle efficiency, carbon emissions
Pages: 797 - 804