| Title |
Research on Lighting Performance Evaluation for Different Curvature Reflection Rate in Residential Space |
| Authors |
Sangwon Oh ; Heangwoo Lee ; Yongseong Kim ; Janghoo Seo |
| DOI |
http://dx.doi.org/10.6110/KJACR.2015.27.6.328 |
| Keywords |
광선반 ; 곡률 ; 성능평가 ; 에너지저감 Light-shelf ; Curvature ; Performance evaluation ; Energy saving |
| Abstract |
Currently, 22% of the total energy consumption of buildings in Korea is used for lighting. Light-shelves have garnered attention as a way to reduce consumption, but there are few studies on the types of curve and curvature, which limits the improvement of light-shelf performance and its design. This study constructed a test bed of actual residential types to evaluate the performance. Outcomes of light usage, according to variables of light-shelves, were used as indicators of performance evaluation. The results are as follows：1) Performance evaluation was conducted on flat-type light-shelves to verify performance of curvature-shelves, which are movable with a width of 200 mm, and the most ideal angle and specification per solar term are calculated. 2) The (-) shaped curvature contributed to a reduction in energy consumption and an improvement of evenness. 3) In case of light-shelves with (-) shaped curvature, an increased angle not exceeding 80° of the arc contributed to an improvement of light penetration. 4) Appropriate specifications of curved light-shelves include movable types with widths of 200 mm, and angle ranges of 20˚~60˚. 5) Light energy consumption of a movable light-shelf with curvature and width of 200 mm were reduced by 17% and 7.8% compared to a 0˚ fixed and a movable light-shelf, respectively. |