Study On Building Daylight Performance Parametric Design

In recent years, energy situation has been very grim in our country. To reduce the energy consumption of buildings and improve the efficiency of energy using have become a common concern of people. Due to lighting energy consumption in buildings accounts for a large proportion in total energy consumption, therefore, to make full use of daylight and cleverly design for daylight have become the main ways to reduce energy consumption of lighting. Parametric design is the most popular method in the field of architectural design. It makes architectural design more logical by using the parameter model and optimizing to control design of construction scheme. In this study, we combined the method of parametric design with the aim of lighting performance. Besides, we built the method of building performance parametric design applicable for the stage of design by a series of researches.The specific work content just as follows:Firstly, we studied window transmittance, window sill height, window-wall ratio, window orientation, and window appearance of the influencing factors of daylight and its effect on the indoor illumination.Secondly, we studied the daylight factors on the influence law of lighting and the heating energy consumption of air conditioning under the balance. Then, we find out the best optimization of various affecting factors and establish a more suitable optimization design method of light environment.Thirdly, we have simulated lighting performance by Rhino, Grasshopper and Geco. At last, we have analyzed the resulting solution by Radiance and established parametric design workflow of daylight performance.This paper have got achievements as follows:(1) Considered the lighting, heating and air condition energy consumption, we find found that the effect of window-wall ratio on the total energy consumption is the most important. (2) We set up the control law of daylight performance parametric design and generated a simulation basic development program of daylight performance by Grasshopper. It lays the foundation for the subsequent development of other performance design procedures.