ZEMCH 2019 International Conference Proceedings April.2020 | Page 94
Calculation Method for Evaluating Diffuse Solar Heat
Gains Through Adaptive Façades
Dong‐Seok Lee 1 , Kyung‐Hwan Ji 1 and Jae‐Hun Jo 1, *
1 Department of Architectural Engineering, Inha University, Incheon, Republic of Korea; [email protected]
* Correspondence: [email protected]; Tel.: +82‐032‐860‐7582
Abstract: The concept of the adaptive façade refers to the design of a building that is able to respond
to environmental conditions in real time by allowing parts of its envelope to move. One building
element widely used to form an adaptive façade is the exterior movable shading device (EMSD). This
study focuses on the changes in the view factors and movements of the adaptive façades of various
shading devices. To calculate the diffuse solar heat gain through an adaptive façade, the combination
of the exposure coefficient (C � ) and view factor (VF) was proposed as a major shading factor. The solid
angle method was adopted to calculate unshaded view factors. The two‐directional folding shade was
then evaluated using the proposed method. The result of the application shows that combining the
C � and VF can reflect the step‐by‐step movement of the dynamic shade to calculate hourly diffuse
solar heat gain. We believe the proposed method can be applied to the process of calculating total
solar heat gain and whole building simulations.
Keywords: Exterior Movable Shade, Adaptive Façade, Solar Heat Gain, Diffuse Radiation
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ZEMCH 2019 International Conference l Seoul, Korea