| Title |
Development of Calculation Methods for Solar Heat Gain and Lighting Energy by Different Types of Kinetic Facade |
| Authors |
Lee, Dong-Seok ; Choi, Su-Ji ; Jo, Jae-Hun |
| DOI |
http://dx.doi.org/10.5659/JAIK_PD.2015.31.12.203 |
| Keywords |
Kinetic Facade ; Exterior Shading Device ; Solar Heat Gain ; Lighting Energy |
| Abstract |
To evaluate annual energy performance of Kinetic facade, a double-skin facade where the movable shading devices installed, hourly shading position should be determined with regard to both of its thermal and lighting energy performances. However, it is difficult to calculate solar heat gain and lighting energy requirement for movable shading devices because of their various changes in shading positions. This paper presents calculation methods for hourly solar heat gain and lighting energy requirement for different types of Kinetic facade so that their hourly movements can be applied to the annual energy calculation. Considering shading movements and material properties, 5 major elements(unshaded fraction, exterior solar attenuation coefficient, exposure coefficient, obstruction index, and light transmittance) affecting thermal and lighting energy were derived. Then, calculation methods of solar heat gain and lighting energy were derived reflecting 5 major elements. 26 types of Kinetic facade were derived and categorized by 3 shapes and 8 movement types of shading devices. Lastly, calculation methods of 5 major elements were derived and set for each type of Kinetic facade. |