Validation and Application of the Mass Balance Model To Determine the Effectiveness of Portable Air Purifiers in Removing Ultrafine and Submicrometer Particles in an Apartment
| Autor: | Petros Koutrakis, Paul J. Catalano, Jun Young Yoo, Wan-Chen Lee, Chan Jung Park |
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| Rok vydání: | 2015 |
| Předmět: |
Nuclear engineering
Airflow Environmental engineering General Chemistry Equipment Design Models Theoretical law.invention Deposition (aerosol physics) Air Filters law Air Pollution Indoor Ultrafine particle Housing Environmental Chemistry Environmental science Air purifier Particle Particle size Particle Size Filtration Air filter |
| Zdroj: | Environmental sciencetechnology. 49(16) |
| ISSN: | 1520-5851 |
| Popis: | We validated the use of the mass balance model to determine the effectiveness of portable air purifiers in removing ultrafine (0.10 μm) and submicrometer particles (0.10-0.53 μm) in an apartment. We evaluated two identical portable air purifiers, equipped with high efficiency particulate air filters, for their performance under three different air flow settings and three target air exchange rates: 0.60, 0.90, and 1.20 h(-1). We subsequently used a mixed effects model to estimate the slope between the measured and modeled effectiveness by particle size. Our study showed that effectiveness was highly particle size-dependent. For example, at the lowest target air exchange rate, it ranged from 0.33 to 0.56, 0.51 to 0.75, and 0.60 to 0.81 for the three air purifier flow settings, respectively. Our findings suggested that filtration was the dominant removal mechanism for submicrometer particles, whereas deposition could play a more important role in ultrafine particle removal. We found reasonable agreement between measured and modeled effectiveness with size-resolved slopes ranging from 1.11 ± 0.06 to 1.25 ± 0.07 (mean ± SE), except for particles35 nm. Our study design can be applied to investigate the performances of other portable air purifiers as well as the influences of various parameters on effectiveness in different residential settings. |
| Databáze: | OpenAIRE |
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