| Summary: | 碩士 === 國立臺北科技大學 === 建築與都市設計研究所 === 104 === After understanding the management strategy of the library, this research makes IAQ improvement more accurately and explore the situation of teaching space that has not been governed. According to the site measurement and computer simulation to propose the optimising improvement strategy for campus space and to assess their effectiveness of improvement measures with the principle of” Sustainability” and “Low energy consumption”. Implement the concept of a sustainable campus and the result of this study to support improvement measures and use it in regular classrooms as other schools’ references. The conclusions of the research can be categorized as follows:
1. Improvement efficiency of library space.
After making the improvement of changing the ventilation path and increasing the fresh air rated in the top of the reading room, the indoor total concentration of carbon dioxide was reduced 0.2921(ppm/person-min), improvement efficiency as 52.4%, and the number of users must be controlled in 73 people or less. After increasing ventilation flow to 2000 CFM in the bottom of the reading room, the indoor total concentration of carbon dioxide was reduced 0.1013(ppm/person-min), improvement efficiency as 38.7%, the number of the user must be controlled in 91 people or less. It could be maintained in a better indoor air quality.
2. Improvement efficiency of teaching space
When the mechanical ventilation time was increased during the class in the regular classroom, the actual improvement efficiency is measured as 69.2%. the original would The machine was turned on after the class started, and changed the starting time from 20 minutes to 15 minutes. We found that indoor circulating fan generated the phenomenon that damaged the ventilation path. The efficiency improvement of closing the circulation fan is 50%. When outdoor wind direction is west, the number of the user can achieve to 100 people or less. And it can be maintained better indoor air quality. (with the ventilation path that set the front door closing, the back door opening, one of the front windows opening, the improved mechanical ventilation and indoor circulating fan closing.)
3. Effect efficiency of outdoor air wind direction and wind speed.
When the outdoor air concentration of CO2 was 425 ppm, following ASHRAE 62.1 norm calculation, the minimum ventilation rates was 18.26CFM(31.2m3/hr). If the number of users was 80, only relying on natural ventilation, it would have required ventilation rate of 7.6 Simulate the actual situation that outdoor wind direction was west and the average wind speed was 1.21 m/s. Its contribution ventilation was rate 2.3 in the space. With the mechanical ventilation system, carbon dioxide could effectively maintain to 1091ppm.When the outdoor wind direction was WSW&W&E and the average wind speed was 1.3m/s, indoor air concentration of CO2 could stay in the standard 1000ppm or less.
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