Research On Comprehensive Evaluation Method Of Lighting Quality In The Commercial Buildings

With the rapid development of economy in China,the number of commercial buildings has increased dramatically.As an important part of the physical environment of the building,the light environment not only needs to meet the basic functional requirements,but also affects the visual comfort of the customers.At the same time,it plays a vital role in creating a commercial atmosphere,which greatly affects the sales situation of the shopping mall.However,commercial building lighting standard are imperfect,and lighting quality evaluation methods are missing,resulting in high lighting energy consumption for commercial buildings.How to minimize the energy consumption of commercial buildings on the basis of ensuring the quality of commercial building lighting is one of the urgent problems to be solved.This study is based on the research and development of new technology and efficient lighting control system in the 13 th five-year plan(2016YFB0601700).First,a field investigation of two large commercial buildings in Beijing was conducted,and physical quantities such as illuminance,general color rendering index,and correlated color temperature were selected for actual measurement,and subjective evaluation of visual comfort was also performed.Through the comparative analysis of the survey data,the quantitative relationship between lighting indicators and visual comfort in the shopping malls is studied,and the general problems of the light environment in the shopping malls were proposed.Then,according to the field research,the status quo of commercial building lighting was obtained,and the commercial building lighting quality evaluation experiment was carried out.The experimental research selected the jewelry store with the highest energy consumption in the shopping mall and the clothing store with the highest proportion of the stores.The real scene was set up in the variable comprehensive laboratory,which a total of 210 lighting conditions were set up(150 kinds of lighting conditions in jewelry stores,60 kinds of lighting conditions in clothing stores),respectively measuring lighting parameters(ambient lighting illuminance,ambient lighting correlated color temperature,accent lighting illuminance,accent lighting correlated color temperature);selected 32 subjects,using questionnaire survey to assess subjectively lighting quality,including lighting comfort and product display effects.Finally,according to statistical analysis of experimental data,the impact of lighting parameters on lighting quality was obtained.The emerging integrated learning XGBoost algorithm is used to construct a classification model for lighting quality evaluation of jewelry stores and clothing stores.The model has good accuracy and can be used to accurately evaluate and to predict the quality of commercial building lighting.This study provides a basis for the improvement of commercial building lighting design standards,provides a method for commercial building lighting quality evaluation,and provides guidance for lighting design of commercial buildings,thereby greatly reducing the energy consumption of commercial buildings while improving the lighting quality of shopping malls.