| Title |
A Study on the Evaluation of Daylighting and Electric lighting Energy Performance in Office Buildings |
| Abstract |
Fenestration is an important consideration in the organization of a building and the main function of fenestration is to admit light.Recently, daylighting is extensively being used as an effective strategy for energy conservation. However, there is only a limited amount of data for analyzing the daylighting and thermal performance in a schematic design stage.In order to conserve energy by using daylight in non- residential building such as office building, one must predict the interior daylight distribution levels and the annual energy saving fraction in the early stages of building design.The objectives of this study are to analyze the factors which mainly influence the window energy performance in office buildings and also to develop simplified calculation tables for analyzing the lighting energy saving fraction of office buildings.In this study, by executing the DOE-2.1B daylighting program to a typical office floor plan, we analyze the reduction rate of lighting energy due to the use of daylight. Employing the experimental design method in statistics, the related factors of fenestration are analyzed and simplified calculation tables are developed for the analysis of daylight performance in office building.The table obtained as a result of experimental design method, allows one to avoid unnecessary repetitions of complicated simulation, easily analyze the complex effects of daylight-related factors and a general, facilitate data analysis. Also, such tables are essential for the analysis of energyconsumption in buildings in the early stages of design. |