| Keywords |
Computational simulation ; Theoretical approach ; Photosensor signals ; Sky ; Prediction models ; Correlation |
| Abstract |
A computational simulation method was discussed in this study in order to predict photosensor signals under a variety of sky conditions. Theoretical approaches for a simulation method were proposed for prediction, and simulation results were compared with the results of field measurements. Results indicate that differences between prediction and measurement of outdoor global illuminance were higher under a clear sky condition compared to that under partly cloud and overcast sky condition. A photosensor positioned closer to window generated less difference between predicted and measured photosensor signals. Percent errors between predicted and measured photosensor signals under overcast sky conditions were higher than those under partly cloudy and clear sky conditions. Prediction models showed that strong correlations existed between predicted and measured photosensor signals. |