| Title |
A Study of Simplified Calculation Methods for Outside Vertical Illuminance using VBA |
| Authors |
Yun, Su-In ; Kim, Kang-Soo |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.12.65 |
| Keywords |
Vertical illuminance ; Perez model ; Igawa model ; shade device ; simplified method |
| Abstract |
The purpose of this study is to predict vertical illuminance accurately at the design stage of a building without the help of simulation tools. Comparing two well-known vertical illuminance prediction algorithms with measured values, it is verified that the Igawa model is more consistent with the measured values ??than the Perez model. Using the DIVA program, we simulated the vertical illuminance at 30-degree intervals from south to north, compared with the vertical illuminance calculated with the Igawa model. The result of calculation values were verified from 120 degrees east to 120 degrees west. The vertical illuminance values with each of three shade devices were calculated using the Igawa model, and compared with the vertical illuminance simulated by DIVA program. As a result, all the errors when installing horizontal / vertical / grid shade divices were included in the error standard specified by ASHRAE. |