Large Public Buildings, Natural Daylighting Design

Currently, the domestic and foreign large-scale public buildings all have deep depth, so the common traditional nature lighting mode is hard to provide sufficient illumination, therefore, they basically adopt the mode of artificial illumination to supplement, which cause the reality of high cost lighting energy. Therefore, how to utilize nature light to meet the indoor illumination requirements of large-scale public buildings through rational design and appropriate technology, is the focus of building energy-saving design currently, is also the trend of future development.This article proposes the nature lighting design process of large-scale public buildings based on summarizing current nature lighting design theory and technology. Based on the proposed design process, this article focuses on analyzing the advantages and disadvantages of specific technologies such as building orientation, atrium, skylight, shading, etc., researches the application focuses of these technologies and the disadvantages need to overcome. Meanwhile, the article also through the domestic and international popular hot environment and light environment simulation software were analyzed, finally combining the characteristics of large-scale public buildings DeST and Ecotect proposed most suitable simultaneous analysis of thermal environment construction with light environment, and instruct the related optimization design.Based on the above studies, this article concluded, summarized and proposed design features which are suitable for the nature lighting of large-scale public buildings, proposed balanced method between lighting and room temperature. These design features can be apply into the nature lighting design of common large-scale public buildings, can increase the indoor illumination and customer satisfaction and also reduce the energy consumption of the building at the same time, to achieve the purpose of sustainable development of the buildings.Finally, this article applies the process, methods and technologies in the passage, takes the New Guangzhou Railway Station as example, analyzes how to obtain good nature lighting effects by using building orientation, skylight design and shading collocation in detail. And use DeST and Ecotect software to do computer simulation analysis on the rebuilding design plan. The result turns out that, the indoor illumination reached a satisfying lever by using these technologies, accords with national standards, and also pays attention on the optimization of indoor thermal environment, saves abundant lighting energy, and provides data support to the nature lighting design of future large-scale public buildings.