Simulation Study Of Reflective Components In Primary And Secondary School Classrooms Based On Spatial And Temporal Homogeneity

China’s primary and secondary school student seats are evenly distributed in the classroom,students in the classroom for a long time,high intensity,primary and secondary school buildings in the general classroom is one of the public building places with high requirements for light environment.At the same time,natural lighting has a more positive effect than artificial lighting on visual work and on visual eye fatigue,which is beneficial to human health,and making full use of natural lighting can also achieve energy saving and emission reduction.Beijing classrooms belonging to China’s Class III light climate zone have a large potential for lighting,but the actual use of the classroom status quo for "long daylight","curtains open lights",the reason is: classroom side windows lighting will lead to uneven distribution of light on the working surface of the classroom,time also Present uneven state,while the sun angle changes can also cause glare.Therefore,how to achieve maximum light uniformity within the year-round working hours and the complete working plane has become a major research barrier to fully utilize natural light.Reflective elements of side windows(such as reflectors and blinds)are the main means to influence indoor lighting and can significantly improve the quality of indoor light environment,while they are easier and more effective compared to measures such as window opening renovation,special material glass replacement and classroom ceiling renovation.Classrooms with high requirements for light environment need special evaluation indexes,and this study proposes effective lighting statistics(UDIS: Useful Daylight Illuminance Statistics)based on UDI(Useful Daylight Illuminance)after a comprehensive comparison and analysis of various lighting evaluation indexes.(UDIS)to evaluate the classroom light environment.In this study,the UDIS index is used as the main evaluation index,and the DGP index of illuminance uniformity and glare probability is used to verify and evaluate the effect of simulation optimization,and the three kinds of simulation diagrams reflect the lighting law through the UDI index(UDI <300lx,UDI300～2000lx and UDI>2000lx),and the preliminary analysis of the parameters of reflective components In the first s tage,we analyze the mechanism of the parameters of the reflective components and the light-reflecting situation,and in the later stage,we add genetic algorithm to find the reflective components of different shapes of classroom light environment when they are optimal,so as to improve the quality of classroom light environment.The article is divided into six parts.The first part is the introduction.This article describes the basic situation of the research in terms of research background,research purpose,research significance,research objects and methods,and domestic and international research developments.The second part is the theory related to the lighting of general classrooms in primary and secondary schools.This study comprehensively compares and analyzes the existing static lighting evaluation indexes,glare evaluation indexes and dynamic lighting evaluation indexes,and also collects and summarizes the basic theories of classroom indoor lighting environment requirements,light climate characteristics of Beijing area,and knowledge of reflective components to make the theoretical basis for the later simulation study.The third part is the research on the classroom light environment of primary and secondary schools in Beijing.The problems of natural lighting in common classrooms are collected through online questionnaires,and the effective lighting statistics UDIS index is proposed based on the effective lighting UDI index for these current situations and problems,while two common typical classroom models are extracted to prepare for the later simulation optimization experiments.The fourth part is a comparative simulation study of different variables of reflective components.Suitable simulation software is selected,and the basic parameters of side window reflective components(such as reflectors,louvers,etc.)are set: the number of leaves,rotation angle and bending situation to conduct experiments,and the general mechanism of the role of each parameter of reflective components and the light-reflecting situation is summarized and analyzed.The fifth part is the research on the optimization design of reflective components.In the experiment,the optimization algorithm: genetic algorithm is introduced to extract the quantifiable reflective component parameters as the independent variables,and the UDIS index is used as the dependent variable to carry out the automatic dynamic lighting calculation simulation to simulate the optimal reflective component,and summarize the mechanism of the optimal reflective component form and the lighting reflection situation.The sixth part is the conclusion and shortcomings.Summarize the research conclusions derived from the simulation and summarize the shortcomings of this study.