抄録
It is important for effective use of natural lighting to influence on energy saving and improvement indoor environment, and to carry out prediction and examination of daylight environment from early stage of design process. In this study, using three methods, measurement, an experiment with models, and a simulation, it was measured indoor illuminance and compared results of each method. Moreover, since values of the daylight factor is stable, it is easy to carry out evaluation, but the case where importance is attached to direct sunlight is more than skylight now. This study is estimating the indoor illuminance under direct sunlight. The results show that each method of the experiment with models and the simulation show the similar tendency to measurement, so the prediction in consideration of direct sunlight of illuminance is possible, and each method of the experiment with models and the simulation can be applied to predict indoor illuminance.
