Design Strategy And Application Of Natural Lighting In Underground Garage

With the development of urbanization and economic development in China,the number of car ownership has also increased sharply.The configuration of parking space has put forward higher requirements.The construction of underground garage has become an important way to solve the increasingly crowded urban space parking problem.Underground garage belongs to the underground space,it has strong shielding feeling and is not conducive to the introduction of natural light.In addition,the underground garage,due to the special use demand,often needs 24 h uninterrupted lighting,and also brings huge energy consumption problems.Therefore,the introduction of natural light into underground garage can not only save energy,but also offset the sense of underground space and create a more comfortable underground space environment.Through the research,it is found that the underground garage in China is still mainly artificial lighting,and the underground garage with natural lighting is less,and the comprehensive use of various natural lighting means is not much.The deficiency of natural lighting is mainly reflected in the shortage of natural lighting,the quality of natural lighting,the simple means of lighting,and the lack of human care.Through experiment and investigation,the lighting system value of underground garage lighting should be 0.5.The optimization method of common daylighting mode is simulated by software.To simulate the shape of the aperture of the skylight,the ratio of skylight to window and window and the ratio of skylight distance to the natural lighting of the underground garage,it is concluded that the equal edge rectangular lighting mouth should be chosen as far as possible to improve the distance to height and select the appropriate value.By simulating the lighting effect of side window,the ratio of side windowand window to 1/10 and above should be reached.When the effective depth of light(b/hs)is4,the standard value of "V" level of lighting level can be reached.To simulate the distribution of light environment in courtyard,it is concluded that the lighting in the middle of underground garage is higher than the edge of courtyard;the upper lighting of the courtyard level is better than the lower part;the light color ground should be used as far as possible to improve the reflectivity of the reflection surface at the bottom of the underground garage.Through the light pipe calculation formula of different size of underground garage column required light pipe type,quantity and efficiency of lighting.According to the conclusions obtained from the research and simulation,the design practice of natural lighting is carried out.The natural lighting methods of skylight,courtyard lighting,side window lighting and light tube lighting are applied to the underground garage in Yulan Garden District of Ji'nan,and the energy efficiency calculation and analysis are carried out.It is believed that natural lighting can be used to create a suitable underground light environment and save energy.