| Keywords |
Annual Daylight Simulation method ; VH ratio ; Daylight Coefficient ; Daylight conditions ; Computational theory |
| Abstract |
This study proposes simulation methods for effective prediction of annual illuminance due to sun and sky, separately. Computational theory for simulation was developed and prediction results by the simulations were validated against the prediction results by RADIANCE program. Among the proposed annual simulation methods for sun, the daylight coefficient method using 4 neighboring skies was most effective for prediction. Sun matching method caused errors in the estimation of direct sunlight due to the location difference between the actual sun and the matched sun. Among the developed annual simulation methods for sky, the daylight coefficient method based on 145 sky patches provides better accuracy in the calculation of illuminance compared to sky matching method. Correlation between illuminance computed using proposed annual daylight simulation methods and the illuminance computed using RADIANCE was strong. Regression models for the difference was acceptable under a significance level of 0.01. |