Research On Optimization Of Lighting And Thermal Environment Of Underground Atriums In Commercial Buildings

The underground atrium of commercial buildings often has large skylights.When natural light is introduced indoors,a lot of heat exchange occurs,leading to potential conflicts between lighting and heat,lighting and air conditioning energy consumption,resulting in waste of energy consumption,so the research on integration of field of underground atrium is necessary.This is especially true in Shanghai,where the summer is hot and the winter is cold.The article takes the core underground atrium with light roof in commercial buildings as the research object.By using the research methods of literature research,survey measurement and software simulation to establish a standard model suitable for numerical simulation of the light and thermal environment of the underground atrium of commercial buildings,the influence of the skylight area ratio of the underground atrium,the plane shape and the material of the shade roller blind on the lighting and thermal environment of the underground atrium was discussed,and the optimal choice was proposed to provide reference opinions for architectural design and engineering practice.Firstly,this paper analyzes the characteristics of the light and heat environment of the underground atrium of commercial buildings,selects the evaluation indexes of the lighting environment,thermal environment and lighting and thermal environment of the underground atrium through literature research,and establishes the research variables of this paper on the premise of controlling the area and volume of the underground atrium.Then,the article systematically sorted out the establishment methods,parameter determination methods and parameter lists of domestic and foreign software simulation standard models.After that,based on on-site investigation and energy-saving codes,a standard model for software simulation of the underground atrium of commercial buildings in Shanghai was established.Using DesignBuilder software,the article simulates and analyzes the effect of the skylight area ratio,plane shape and shade material of the underground atrium on the indoor lighting environment,thermal environment,and lighting and thermal environment.The simulation results show that the influence of skylight area ratio and the solar transmittance of the sunshade shutter on the lighting and thermal environment of underground atrium is relatively large,while the influence of plane shape on the lighting and thermal environment is relatively small.In this paper,it is concluded that the optimal choice for the comprehensive situation of the lighting and thermal environment is that the skylight area ratio is 0.8,the plane shape is circular,and the solar transmittance of the sunshade shutter is 0.5.In this paper,through an inductive analysis of the relevant research on the light and thermal environment of the underground atrium of commercial buildings,combined with the field survey in Shanghai,the three building design elements of the underground atrium are simulated to study the impact trend of their light and thermal environment,and their general laws are summarized.,Can provide design ideas for similar practical projects,has a certain practical significance.This paper has 72 figures,40 tables and 104 references.