Research On The Method Of Daylighting Glare Analysis And Optimal Design In Multimedia Classroom

At present,multimedia equipment has become one of the main technical methods in all kinds of school teaching.But in the existing multimedia classrooms,where projectors as the main technical measures,day lighting utilization is far less than it should be.One of the main reasons is the day lighting glare caused by the bad classroom lighting quality.How to reduce the impact of day lighting glare on the multimedia classroom,whilst enhance the quality and utilization of natural lighting,and create a healthy light environment for teachers and students,are the key point of the research works of day lighting design in multimedia classrooms.To solve the problem of day lighting glare in multimedia classrooms is of great significance to the energy saving and sustainable development of the teaching buildings.This paper mainly discusses the day lighting glare evaluation indexes and methods which is suitable to multimedia classrooms,and its optimizing design methods.Firstly,this paper chooses the daylight glare index(DGI),as a multimedia classroom daylight glare index analysis,based on the comparing of variety of glare evaluation indexes exist now;in the meantime,makes a questionnaire survey via network to investigate the status of day lighting and glare situation in multimedia classrooms,and the factors of subjective visual sentiments in multimedia classrooms influenced by day lighting glare were analyzed.Secondly,in this paper a typical multimedia classroom are taken as an example,the field test is carried out,and the DGI numerical comparison between the measured data and the EnergyPlus software simulation is carried out to verify the feasibility of the simulation method and the rationality of the parameter setting method.Thirdly,through the simulation of the vernal equinox,autumnal equinox,summer solstice,DGI numerical changes and distributions of four typical date of winter solstice,evaluation method based on daylighting glare standard and standard time position percentage two as quantitative indicators,to evaluate the influence degree of day lighting glare of multimedia classroom.Fourthly,from the two aspects of the glazing design and the sunshine shades of the multimedia classroom,the day lighting glare optimization scheme is evaluated and compared,and the design scheme of the multimedia classroom with the minimum glare effect is obtained.This paper gives suggestions for the design of new teaching buildings and the further research of multimedia classrooms day lighting glare,through the analysis and research of multimedia classroom of day lighting glare problems.Hence to provide reference for the renewing of day lighting design standards.