Daylight and Energy Performance of Automated Shading with Parametric Design: Case Study Bangkok

Abstract

Ongoing rise of global warming and climate change leads to a new paradigm shift for architectural skin from passive to active system. Limitation lies in overall performance results of static shading in dynamic environment. The result emphasizes a higher performance of automated shading for adapting more to the environment. The adaptive ability to protect facade from high-intensity solar radiation and maintain indoor environment quality in all conditions result into higher effectiveness overall. Computational integration in modeling and simulation are necessary for automated shading design, evaluating daylight performance and estimating lighting and cooling loads were required in early design stage for energy-efficient design. This paper presents a study of automated shading in diamond shape with rotation movement through parametric design to explore alternative design schemes and generating parameters including size and angle of shading. The simulation are performed using DIVA-for-Grasshopper and Archsim plug-ins under Perez sky from Bangkok weather file. The experiments aim to optimize daylight performance and energy efficiency. The evaluation compares results of 3 experiment cases of an open plan office typically found in Bangkok as following; no shading, static shading and automated shading cases, all of which are evaluated on south facing façade. The outcome demonstrates that automated shading achieved higher daylight quality, more uniformity and reduce overall energy consumption compared to no shading and static shading cases. Finally, parametric design of automated shading is suggested as a tool for architects and designers to choose the most appropriate design for their project prior to construction.