Daylighting Simulation for Sustainable Certified Building - Tokyo Global Square, Minato City, Japan

Abstract

According to the World Green Building Council, Sustainable Building or Green building refers to a building that, in its design, construction, or operation, minimises or eliminates negative impacts on the climate and natural environment while also creating positive impacts and improving our quality of life. It aims to conserve natural resources. This study focuses on assessing the effectiveness of daylighting in enhancing the overall efficiency of an office building. The selected office building, Tokyo Toranomon Global Square, located in Minato City, Tokyo, Japan, is certified by LEED and has received sustainable ratings. LightStanza has been utilised as a daylighting simulation tool for this study. The findings reveal that several factors influence the efficiency of the space, including building orientation, window type, glass type, facade materials, and room depth. Through computer simulations, it has been determined that the average illuminance level of daylight entering the building meets the ideal illuminance values specified by specific organisations that provide criteria for optimal lighting in office working spaces, namely as the Japanese Industrial Standard, (JIS Z 9110, 2010 – General rules of recommended Lighting Levels).