| 요약2 |
The office buildings with the curtain wall structure are weak in the cooling load, because of the high frequency of usage and the high interior gains during a day. Controlling Window to Wall Ratio and applying low U-factor windows are used to improve this, but they have the limitation of the improvement. In this study, a building energy simulation was conducted. And the influence on the energy performance was analyzed according to Window to Wall Ratio(WWR), Visible light Transmittance(VLT), Solar Heat Gain Coefficient(SHGC) and U-value. The results of this study are as follows; 1) WWR can be an independent index of energy performance of the office buildings with dimming control system. 2) As SHGC of glazing is higher, cooing energy is increased, heating energy is decrease. And total energy is increased. That is the change of SHGC more influence on cooling energy than heating energy. 3) As SHGC of glazing is lower, the turning point of cooling and total energy in a high WWR. And the energy reverse is occurred when WWR is so low. That is increase of lighting energy is higher than decrease of cooling energy, when WWR is so low. 4) The planning for energy saving of office buildings with dimming control system is considered SHGC and VLT first and WWR after. |