| Author: | Chen, Yunyi |
| Title: | The impact of natural ventilation on indoor air quality at different height in Hong Kong |
| Advisors: | You, Ruoyu (BEEE) |
| Degree: | M.Eng. |
| Year: | 2023 |
| Subject: | Indoor air quality Ventilation Natural ventilation Air -- Pollution Hong Kong Polytechnic University -- Dissertations |
| Department: | Department of Building Environment and Energy Engineering |
| Pages: | 51 pages : color illustrations, maps |
| Language: | English |
| Abstract: | The paper investigates the relationship between natural ventilation and indoor air quality (IAQ) in urban buildings. The study highlights the importance of understanding the role of natural ventilation in promoting good IAQ while also considering the potential impact of outdoor pollutants. The research design involved selecting five rooms at different elevations in the same building and measuring the concentrations of VOCs, CO2, PM10, and PM2.5 before and after two hours of natural ventilation. The study found that natural ventilation is an effective means of improving IAQ in buildings located in urban areas with common sources of pollution. The data showed that natural ventilation significantly reduced indoor VOC and CO2 concentrations in all five rooms, regardless of the height of the room. However, the effectiveness of natural ventilation in reducing PM10 and PM2.5 concentrations varied depending on the height of the room. Rooms located below the sixth floor experienced an increase in PM10 and PM2.5 concentrations after natural ventilation, while rooms located above the sixth floor experienced a decrease. Therefore, the effectiveness of natural ventilation in reducing indoor pollutant concentrations may vary depending on the height of the building, and additional measures such as mechanical ventilation should be considered in buildings located on lower floors. The study's findings have important implications for building design, urban planning, and IAQ management in Hong Kong and other urban areas. The results suggest that natural ventilation should be considered in building design as a means of improving IAQ in urban areas. However, the effectiveness of natural ventilation in reducing indoor pollutant concentrations may vary depending on the height of the building, and additional measures such as mechanical ventilation should be considered in buildings located on lower floors. The study also underscores the need to consider the impact of pollution sources on IAQ when designing buildings and developing effective ventilation strategies. In conclusion, this study provides valuable insights into the effectiveness of natural ventilation in improving IAQ in urban buildings. The findings suggest that natural ventilation can be an effective means of improving IAQ in urban areas, but its effectiveness may vary depending on the height of the building. Therefore, it is necessary to consider different ventilation strategies to ensure good IAQ in buildings located on lower floors. These findings have important implications for building design, urban planning, and IAQ management in Hong Kong and other urban areas, where sustainable solutions are essential for maintaining good IAQ while reducing the strain on non-renewable resources. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 7113.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 659.9 kB | Adobe PDF | View/Open |
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