Structural and Environmental Design of Double Covers with Air Gap Shed Roof Building for Bio-production

• Main Authors: Wang Chi-Shuen, 王啟順
• Other Authors: Hou Wen-Shang
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/34167988067938861877

碩士 === 國立臺灣大學 === 生物環境系統工程學系暨研究所 === 91 === This study focus on two aspects, structure and environment, to discuss the rational design of bio-production buildings in Taiwan. In terms of structure, this study adopts shed roof as building shape and light-gauge steel as material. Choosing four span-height ratios between 1.36 to 2.50 and three main frame space variations to constitute 12 modules, then using computer software to analyze safety and economy of each module. The results show that if building length is an unit in 10m with space requirement under 33m2, it will be more economy when span-height ratio under 1.4 and main frame space under 2m. Furthermore, if the space requirement of building is between 33 to 55m2, then the most economy way is to keep the frame space in 2.5m for the span-height ratio may raise from 1.50 to 2.50 and the indoor space is increased at the same time. It is true that we can find more economy designs when stress ratio of main frame approaches to 1. In terms of environment, proceeds a modeling experiment using a model house in a scale of 1/4, which has double covers with air gap, to discuss the heat insulation in summer daytime and the capacity to keep warmth in winter nights. The results of the experiments which simulating summer show that when air gap width is 20cm, sheltering rate of the shading net is 80% and fans are operating in 75% power, indoor temperature would drop 13.4°C with heat reduce 19.0%. For experiments which simulating winter, the outcomes indicate that when air gap width is 20cm with the windows closed, It would take double of the time to reduce 50% temperature difference, and the final rate of temperature dropping reduces 9.1% after one hour.