玻璃幕牆 反射 太陽輻射
在世界各地，均有摩天大厦玻璃幕牆反射太陽輻射, 造成滋擾，危害健康，並引致財物破壞和賠償。強光可使司機短暫「致盲」。Dr. Justin Wong 首創光線追踪模擬（ray tracing model） 研究這現象。他指出，尤其是擁有大玻璃幕牆的巨型建築物,若在規劃階段對玻璃幕牆反射作環境影響評估， 並作適當設計改善調整，這些問題是可以避免或緩解的。
Dr.Wong 的科學文獻 “A comprehensive ray tracing study on the impact of solar reflections from glass curtain walls” 已在 Environmental Monitoring and Assessment 刊登。
January 2016, 188:16
First online: 08 December 2015
撮要 ABSTRACT
To facilitate the investigation of the impact of solar reflection from the façades of skyscrapers to surrounding environment, a comprehensive ray tracing model has been developed using the International Commerce Centre (ICC) in Hong Kong as an example. Taking into account the actual physical dimensions of buildings and meteorological data, the model simulates and traces the paths of solar reflections from ICC to the surrounding buildings, assessing the impact in terms of hit locations, light intensity and the hit time on each day throughout the year. Our analyses show that various design and architectural features of ICC have amplified the intensity of reflected solar rays and increased the hit rates of surrounding buildings. These factors include the high reflectivity of glass panels, their upward tilting angles, the concave profile of the ‘Dragon Tail’ (glass panels near the base), the particular location and orientation of ICC, as well as the immense height of ICC with its large reflective surfaces. The simulation results allow us to accurately map the date and time when the ray projections occur on each of the target buildings, rendering important information such as the number of converging (overlapping) projections, and the actual light intensity hitting each of the buildings at any given time. Comparisons with other skyscrapers such as Taipei 101 in Taiwan and 2-IFC (International Finance Centre) Hong Kong are made. Remedial actions for ICC and preventive measures are also discussed.
