The purpose of this study is to evaluate the performance of visual comfort and lighting energy according to the application of smart windows based on in-situ measurement. To this end, suspended particle device smart windows were applied to an apartment building, which is representative residential building in Korea, related sensors and equipment were installed, and data was collected over '22.07~09. In addition, the evaluation items for visual comfort were set with glare and indoor daylight illuminance, and each evaluation indicator adopted DGI (Daylight Glare Index) and UDI (Useful Daylight Illuminance). Energy performance evaluation was analyzed through lighting energy consumption. In the case of cloudy day, glare did not occur in the control group, so it was found that glare control by smart window discoloration was unnecessary. In the case of partly cloudy day and the clear day, regardless of the smart window control method, the DGI value was always below 22 when applying the smart window, which was found to be effective for glare control. In terms of promoting UDI and reducing lighting energy consumption, it was found to be effective in controlling smart window discoloration rather than always discoloring smart windows under all sky condition. And it was found that the difference in effect was not large when the discoloration reference value was 200 lx or 400 lx.
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© 2023 Architectural Institute of Korea.
- In-situ measurement
- Lighting energy
- Residential building
- Suspended particle device smart window
- Visual comfort