การกระจายตัวตามแนวตั้งของฝุ่นละอองขนาดไม่เกิน 2.5 ไมครอน บริเวณอาคารสูง ประเภทสำนักงาน และที่พักอาศัย
This study aims to investigate the vertical distribution of PM₂.₅ at high- rise office building and residential building in Bangkok. PM₂.₅ was measured by a real- time monitor, Aeroqual series 500. The measurement was conducted at the height of 4.5 and 138.5 m of the office building during 13 -27 Ja...
محفوظ في:
| المؤلف الرئيسي: | |
|---|---|
| مؤلفون آخرون: | |
| التنسيق: | Senior Project |
| اللغة: | Thai |
| منشور في: |
คณะวิทยาศาสตร์ จุฬาลงกรณ์มหาวิทยาลัย
2019
|
| الموضوعات: | |
| الوصول للمادة أونلاين: | https://digiverse.chula.ac.th/Info/item/dc:10502 |
| الوسوم: |
إضافة وسم
لا توجد وسوم, كن أول من يضع وسما على هذه التسجيلة!
|
| المؤسسة: | Chulalongkorn University |
| اللغة: | Thai |
| الملخص: | This study aims to investigate the vertical distribution of PM₂.₅ at high- rise office building and residential building in Bangkok. PM₂.₅ was measured by a real- time monitor, Aeroqual series 500. The measurement was conducted at the height of 4.5 and 138.5 m of the office building during 13 -27 January 2020, and at the height of 12.8 and 124.9 m between 30 -11 February 2020 for residential building. The results showed that the average outdoor PM₂.₅ concentrations at the office buildings at the height of 4.5 and 138.5 m were 34.49±21.48 and 30.78±18.64 μg/m³, respectively, and those of the residential building at the height of 12. 8 and 124. 9 m were 33. 93±14. 57 and 24. 83±10. 74 μg/m³, respectively. The 24-h average indoor PM₂.₅ concentration of the office buildings at both heights were 30.36±17. 77 and 28.62±18.60 μg/m³, respectively, and those of the residential buildings at both heights were 28.87±10.39 and 21.96±8.04 μg/m³, respectively. The daily profiles of indoor and outdoor PM₂.₅ were similar. The profiles at the residential building exhibited a universal characteristic of "two peaks and one valley" and, which found a high concentration in the morning and began to decrease at noon, then rose again in the afternoon until about 8pm and decreased during the night time until early in the morning. Whilst the profile at the office building during the measurement period was different, the high concentration from morning till evening and gradually decreasing at night was observed. The outdoor PM₂.₅ concentrations at both buildings was significantly different from those in indoor with 95% confidence level, and the significant positive relationship between indoor and outdoor could be obtained. The average I/O ratio of the office buildings at the height of 4.5 and 138.5 m were 0.92 and 0.93, respectively, and for residential buildings at the height of 12.8 and 124.9 m, the average ratios were 0.89 and 0.92, respectively. The significant positive correlation between the concentrations measured at the ground and upper floors was observed. However, there was a significant difference between the concentrations at both levels at 95% confidence level. PM₂.₅ concentration decreased as a height increased, the decreasing of 10% approximately was found at office building, while a higher decreasing rate of 25% presented at the residential building. Air pressure at both buildings was positively correlated with the PM₂.₅ concentrations, while wind speed gave a negative relationship. The correlations between temperature and PM₂.₅ at the office (positive) and residential (negative) buildings were different. Relative humidity showed a negative relationship with PM₂.₅ at residential buildings, while that of the office building was not significantly correlated. |
|---|