Energy Saving Analysis And Evaluation Method Of Lighting System In Public Buildings

With the rapid development of China’s urbanization process,the scale of building has grown rapidly.At the same time,the building energy consumption has also increased rapidly,and the building energy consumption accounts for a relatively large proportion of society’s overall energy consumption.Among them,the public buildings as one of the types of buildings,whose energy consumption accounts for 30.4% of the total national building energy consumption.While the lighting energy consumption accounts for 20% to40% in the energy consumption of public buildings,which has great energy-saving potential.There are many factors that affect the energy consumption of public building lighting systems,including the selection of light sources and lamps,the natural lighting conditions,the lighting system design,the lighting control strategies,the personnel behaviors,and so on.The energy saving analysis of public building lighting systems can be carried out around the above-mentioned influencing factors.Among them,the use of efficient light sources and lamps has a significant the energy-saving effect on new buildings.The full use of natural light can reduce the power consumption of artificial lighting and reduce energy consumption.The reasonable lighting system design can reduce lighting energy consumption,and human behavior is a key factor affecting lighting energy-saving.Among them,analyzing the impact of lighting control strategies on energy saving is the key research content of this article.The unreasonable control strategies often increase lighting energy consumption,and there is currently no reasonable evaluation method to evaluate lighting energy-saving effects.Therefore,the optimization of lighting control methods and the research on lighting energy-saving evaluation methods are of great significance to the energy saving of lighting systems.The research content mainly includes the following three aspects:(1)The analysis of energy-saving factors.Combined with the characteristics of public buildings,this paper analyzes the factors that affect the lighting energy consumption,explain the specific impact of each influencing factor on the energy saving effect of the lighting system,and analyze the corresponding energy-saving measures for the energy consumption influencing factors,in which the lighting control strategy is optimized.It can effectively achieve the energy saving effect,so this paper starts from the lighting control strategy to analyze the energy saving.(2)The intelligent lighting energy-saving control.Based on the analysis of the existing intelligent lighting model,it is improved to propose a dynamic model of the intelligent lighting.This model not only satisfies the visual effect of the human eye,but also has important significance for building energy-saving.The intelligent lighting dynamic model takes the minimum energy consumption as the objective function,and the constraint condition is that the actual illuminance on the working surface is greater than or equal to the user’s expected illuminance.One simplex algorithm is used to solve the model,and the dynamic lighting model is simulated and verified by using the DIALux software.The simulation results show that the intelligent lighting dynamic model can adapt to the user’s personalized needs,the outdoor natural lighting changes,and the adaptive dimming.Therefore,the energy consumption gets significantly reduced,The lighting system achieves energy saving effect.(3)The study on the evaluation method of lighting energy saving.This paper selects the use of efficient energy-saving lamps,the full use of natural light,the selection of reasonable lighting control strategy,the use of electrical accessories for efficient energy-saving lamps,the behavior of personnel are selected as the evaluation indexes for the optimization of lighting energy efficiency of large public buildings,and the weight vector of each evaluation index is determined by AHP.This paper analyzes the advantages and disadvantages of the existing lighting energy-saving methods by using the lighting density power,and puts forward the lighting energy-saving evaluation method according to the actual lighting energy consumption,which reflects the lighting energy-saving effect by calculating the energy-saving efficiency.The results show that the evaluation method is more comprehensive and accurate to realize the evaluation of lighting energy saving,so as to further optimize the lighting system.