Paper Conference

Proceedings of Building Simulation 2021: 17th Conference of IBPSA


Designing a Solar Shading Solution Parametrically using the Direct Sun and the View to the Outside for a Building in Ho Chi Minh City, Vietnam

Pedro Marques, Chinh Trieu, Wim Boydens
Studiebureau Boydens, Belgium

Abstract: In this case study in Ho Chi Minh, Vietnam, the architectural design featured a passive shading element, following a pattern of vertical elements with varying depth, width, and thickness. Using state-of-the-art assessment tools, the performance of the element was to be assessed and optimized. The main challenge was to build a highly responsive solution: if the feedback loop of the facade analysis is slow, it would not follow the architectural changes during concept phase and the analysis would lag behind the experiments of the design team. At first, it was decided to use dynamic daylight simulations using Radiance engine so that the facade design could be studied in detail. This approach was deemed unfit as optimized results would take away the view to the outside, which was one of the key assets of the design (Figure 2). Hence a different approach was necessary. Instead of using one global metric for daylight, two static calculations were introduced in the parametric script: the direct sun penetration and the view to the outside. This approach proved more effective and faster than the first one. The extra time allowed to test more cases, and to optimize each piece of the facade based on its orientation. A dynamic daylight simulation confirmed the efficiency of the final proposed facade.
Keywords: Radiance, daylight, direct sun
Pages: 3398 - 3399