The efficacy research on window opening and horizontal shading plates and indoor daylighting performance -A case study on a reading lobby in a university in Central Taiwan-

• Main Authors: Chun-Hsiu Chang, 張俊修
• Other Authors: Jhun-Iuan Kuo
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/83891291169247512494

碩士 === 朝陽科技大學 === 建築及都市設計研究所 === 99 === This research targets on analysis how natural daylighting in “reading lobby of a library”would counteract with building shading style, size of opening, indoor infraction rate. A“Field Research”was conducted in this research for exploring current performance and efficacy of daylighting in a reading lobby in a library and making an on-site investigation and records in terms of how daylighting performance would counteract with (the building). The on-site observation provided original and raw data and some factors found from reference documents were consolidated for subsequent selection and database collection of experimental factors. A scale model was also adopted in this research for analyzing how different sizes of openings and horizontal shading plated would counteract with indoor daylighting performance in a Sky Dome; and also using a computer simulation softwar “Ecotect” for exploring how different sizes of openings and horizontal shading plates would counteract with the indoor shading performance. The field study adopted in this research demonstrated that the smallest sampling opening rate is 10.5%, biggest sampling opening rate is 96.6%, with opening rates ranging between 55%~65% the most frequently; The smallest window height-width scaling ratio is 0.3：1, and the biggest is 2:1, with most ranging between 0.4~1.5. The relative value between shading plate overhanging ratio and window height scaling create a positively counteracting relationship ranging from the minimum value of 0.2 to the maximum value of 2. The daylighting performance experimental results indicate that window opening height-width scaling ratio counteracts positively with daylighting performance, but the overhanging ratio counteracts negatively with shading performance, and window opening rates always counteract positively with daylighting performance regardless of adopting shading plates or not. In terms of shading performance, window opening rates counteract negatively with shading performance, and the window height-width scaling, overhanging scale counteract positively with shading performance and the duration of fixation of shading plate counteracts negatively with window height-width scaling and shading performance. The research results demonstrate that the space arrangement with a distance of 1.5m~3.5m to the windows can enjoy effective daylighting performance within the reading lobby. It is thus suggested in this research that the window opening rate within the reading lobby shall be 55%~65%, and opening height-width scaling shall be between 0.4~1.5 and shading plate overhanging scaling shall be between 0.2~0.8.