Paper Conference

Proceedings of ASim Conference 2012: 1st Asia conference of IBPSA-China, Japan, Korea


Energy impact of the window area in residential buildings

Sun-Hye Mun, Seong-Jun Yun, Yong-Woo Jung, Jung-Ho Huh

Abstract: Since windows are thermally vulnerable compared to exterior walls, special attention is required in building design. Windows are composed of frames, glass and spacers, and the overall performance is determined by area proportion and the performance of each part. Nevertheless, in most studies, changes in performance due to area changes have not been taken into account. In this study, we examined the problems that might arise in the application of u-value and g-value by reflecting changes in the u-value and the g-value (Solar Heat Gain Coefficient) of the window, depending on the area changes in energy demand analysis. Research results showed that if the u-value differences between frames and glasses are greater, the u-value changes due to the increase in window area. In addition, it was analysed that in case changes in the u-value and the g-value due to changes in the area are reflected in the energy demand analysis, heating energy demand increases, and cooling energy demand decreases when compared to other cases. Accordingly, changes in the u-value and the g-value due to changes in the window area must be reflected so a more accurate energy simulation analysis can be conducted.
Pages: 62 - 69