Changes in Aerosol Concentration in a Meeting Room with a Portable Air Cleaner - Mapping Fine Particle Concentrations
Abstract It is well established that fine particles are a major indoor air pollutant in industrial and tertiary sector buildings. Whether these particles are of biological origin (micro-organisms) or not, human exposure to these air pollutants is a major health risk. Portable air cleaners are presen...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Springer
2024-09-01
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| Series: | Aerosol and Air Quality Research |
| Subjects: | |
| Online Access: | https://doi.org/10.4209/aaqr.240087 |
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| Summary: | Abstract It is well established that fine particles are a major indoor air pollutant in industrial and tertiary sector buildings. Whether these particles are of biological origin (micro-organisms) or not, human exposure to these air pollutants is a major health risk. Portable air cleaners are presented as one way to reduce their concentrations. Here, measurements were carried out in a real 93 m3 meeting room to determine how well such devices can reduce fine particle (PM1) concentrations. A wireless network of ten SPS30 particle concentration sensors were placed in the room in positions selected based on an optimized experimental design. Various air cleaning configurations were studied, differing based on the type of air cleaner, its flow rate, and position in the room. The data collected was used to model the instantaneous PM1 concentration at all points in the room. Overall, the concentration at all points follows the decay over time of a perfect mixture in exp(−t/τ), where τ is the time constant equal to Vr/Q (room volume/filtration air flowrate) at ±15%. Although disparities in concentration were observed in this room, with no major obstacles, mixing of the cleaned air throughout the volume was quite efficient, and concentration gradients were low. |
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| ISSN: | 1680-8584 2071-1409 |