Study On Daylighting And Energy Consumption Analysis Of Large Depth Office Buildings

With the development of urban construction, the number of office buildings is increasing.,building energy consumption problem has become increasingly prominent. More and more office buildings are large-depth offices,due to the large depth,the level of internal natural light is poor. The daylighting of the side window performance is particularly important at this time. Based on the full understanding of the area about hefei's light climate conditions, analyzing the effect of different factors on the large depth of different impact the daylighting of the office by Radiance. At the same time, we analyzed the building energy consumption about lighting,air-conditioning and heating and explore the influence about energy consumption of different windows on building.The main contents of this dissertation listed below:1.Through a large number of literature research and the analysis of the domestic and foreign research results of office building lighting, the study found that there are various factors influencing the indoor daylighting.According to the research of office buildings,it's easy to know that there are many problems exist in large depth of office buildings. This chapter introduces the theoretical knowledge of natural lighting, lighting evaluation index, and lighting analysis software.2.After investigating the light climate features in Hefei, the study choose Radiance software to simulative and analyze the impact of daylighting level in large-depth office building's daylighting in CIE sunny and CIE overcast conditions,such as such as window-to-floor ratio,window sill height, shape and arrangement.Analyzing the energy consumption about different side windows,such as lighting, air conditioning, heating. Natural lighting and energy consumption must be combined when we compared with each others.3.Analyze the lighting of a office building in Hefei, in order to look for a better daylighting effect,it's necessary to simulate different side window's lighting conditions.The findings of this study listed below:1.Window-to-floor ratio increase, the value of illumination will also increases in lage-depth areas.The uniformity of illumination will be better,too.Window height increases, the intensity of illumination in the area of the depth of 1.4 ~ 6 m value increases,in the most deep area,the illuminance value is larger.Large-depth office should improve deep window height to improve the daylighting of the large area deep illumination. When square window's height be larger, the illumination uniformity will be better. Comparing the round shape window to the square window, the uniformity of illumination about round window is higher. With the increase in the number of vertical windows, between the depth of 1.0 m to 4 m, illuminance values increase slightly. When the window is arranged horizontally, the lighting effect is better than the vertical arrangement.2. Integrated lighting, heating and air conditioning energy consumption,with the increase of window-to-floor ratio, the overall energy consumption increased; window height increase will lead to the decrease of the total energy consumption of building. The width of the window increases so that the total energy consumption of the building can be increased. Vertical arrangement of the number of windows increased, energy consumption also increased. As long as the daylighting satisfied the requirement of the standard,it will save more energy in two windows condition.