Research On Design Strategy Of Atrium Photovoltaic Skylight Based On Spatial Light Environment Quality

With the gradual increase of the building volume,the internal lighting and ventilation can only rely on the establishment of atrium,and the design of the atrium space have an important impact on the building's use function and indoor physical environment quality.The natural lighting of atrium skylight does improve the indoor light environment,but it also brings problems such as energy consumption and indoor physical environment due to the influence of external disturbance.How to reduce the influence of uncomfortable light environment and uneven illumination through reasonable design has become the research focus of atrium skylight design.That is to improve the quality of natural lighting,and create a healthy and comfortable space light environment.In recent years,solar photovoltaic power generation technology has been vigorously promoted and developed.The integrated utilization degree in the construction field has been gradually improved,and the integrated technology of photovoltaic power generation system and transparent building envelope has been developed.On the other hand,with more large area glass skylight widely used,it brings a series of gradually increased problems such as indoor summer exposure,glare,and negative impact on the indoor environment.In this case,the demand of the building shading increases,and the installation of shading louver gradually increases.It is not the design purpose of large area skylight.Facing this current problem,the application of semi-transparent photovoltaic skylight can be a solution to balance the contradiction between skylight lighting and shading due to the partial sunshade effect of photovoltaic cells,but it also brings about the impact on the light environment such as weakened lighting and uneven lighting.At present,the application of photovoltaic window is in its infancy,and its design strategy is not complete.It is urgent to study the appropriate design strategy of photovoltaic skylight to achieve the balance of lighting and shading and create a better indoor light environment.There are a number of large atriums built and to be built in China with the significantly different light climate.This study is meaningful for the design of potential photovoltaic skylight utilization scenarios under different climate conditions.Based on the current situation of the building atrium skylight,this paper analyzes the existing applicable photovoltaic glass modules based on the integrated combination of solar photovoltaic power generation technology and building glass components,and obtains the lighting characteristics and key design parameters.It can be concluded that the uniformity of crystalline silicon insulating glass photovoltaic modules is poor,there are obvious light and shadow,film uniformity is good.Through the establishment of the solid scale model,the optical performance parameters and indoor illumination distribution were measured,and the reliability of experiment was verified by software simulation.Through building light environment simulation software from photovoltaic glass selection,area ratio of photovoltaic materials and climate conditions of typical city to simulate the indoor light environment system of static and dynamic.Based on different climatic conditions,the multi-parameter comprehensive evaluation of the indoor light environment of atrium space is studied for the application of two mainstream photovoltaic skylight modules,namely crystal silicon and thin film,in different area ratio of photovoltaic materials.The PV material area ratio parameters of thin film and crystalline silicon photovoltaic skylight were obtained when the indoor light environment reached the best: its 60-50% for thin film and 60-50% for crystalline silicon in Xi'an;thin film 70-60%,crystal silicon 70-50% for Beijing;film 60-50%,crystal silicon 70-60% for Shanghai;thin film 60-50%,crystal silicon 70-50% for Guangzhou;film 60-40%,crystal silicon 60-40% for Harbin;film 50-30%,crystal silicon 50-30% for Chongqing.According to the data results,the design strategies of photovoltaic skylight can be summarized under different climatic conditions.This paper focuses on building the light of the atrium space environment,combining the present developing photovoltaic integration design,using the method of model test and software simulation,statistical analysis of photovoltaic glass component selection and parameters on the static and dynamic light environment of the atrium space,and on the basis of selecting the best photovoltaic material area under different climate conditions than the parameters as a result,provide a reference for the optimal design of the existing atrium skylight,and put forward new photovoltaic roof design strategy,the atrium space lighting design and the photovoltaic building integrated design standards and norms related to the perfection of support.