| Skylights are set up in the underground commercial street,which can improve the indoor natural light environment,increase the light level of the space,and improve people’s visual comfort.However,if not properly designed,it will also bring about a large amount of heat exchange,resulting in fluctuations in the indoor temperature.Therefore,it is necessary to study the integration of light and heat in underground commercial streets to balance the contradiction between light and heat.This paper takes the strip-shaped closed underground commercial street with skylight lighting roof as the research object,adopts methods such as literature research,field investigation and testing,and software simulation to establish a standard model suitable for numerical simulation of the light and heat environment of underground commercial streets,and discusses orientation,The influence of the length-to-width ratio of the skylight well,the performance of the glass material of the skylight and the reflection coefficient of the inner surface material on the light and heat environment of the underground commercial street,and the optimal design options are proposed.This paper first analyzes the characteristics of the light and heat environment of the underground commercial street,and selects the comprehensive evaluation indicators of the light environment,thermal environment and light and heat environment of the underground commercial street through literature research.Then,through the field investigation and the actual environment test,the current situation of the light and heat environment of the atrium space in the underground commercial street in Shanghai is analyzed.According to the field investigation and related regulations,the research variables of this paper were established,and under the premise of controlling the area of the underground commercial street,a standard model for numerical simulation of the light and heat environment of the underground commercial street in hot summer and cold winter regions was established,and the simulation calculation of the light and heat environment was carried out.Use Ladybug&Honeybee software to simulate and analyze the influence of orientation,skylight shaft aspect ratio(SAR),skylight glass material properties and inner surface material reflectance on the indoor light environment,thermal environment and integration of light and heat environment,and use the Design Explorer data processing platform Analyze simulation results.The simulation results show that the aspect ratio of the skylight well,the performance of the glass material of the skylight and the reflection coefficient of the inner surface material have a greater impact on the photothermal environment of the underground atrium,while the orientation has less influence on the photothermal environment.For the standard model of the underground commercial street in hot summer and cold winter regions,the optimal choice for the integration of light and heat environment is to arrange at 40 ° from north to east,with skylight wells with a height-to-width ratio of 2.0,medium light transmission,low total solar radiation transmittance,and low As for the glass material with heat transfer coefficient,the skylight shaft wall material with a surface reflection coefficient of 0.7～0.8 and the ground material with a surface reflection coefficient of 0.3～0.6 are selected.Through the induction and analysis of the relevant research on the photothermal environment of the underground commercial street,combined with field research and relevant specifications,the influence trend of the four design elements on the photothermal environment of the underground commercial street is simulated,and the law of influence is summarized to provide relevant practical engineering To provide design ideas and references has certain practical significance. |
