Authors:

Youyi Zhou

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About Paper:

Indoor air quality because of the presence of bioaerosols has long been a concern, which has been further heightened by the Covid-19 pandemic. Improving indoor air quality requires novel purification technologies to remove these bioaerosols. This study focuses on investigating photocatalytic oxidation and acoustic technologies to reduce bioaerosol concentration by combining them with heating, ventilation, and air conditioning systems (HVAC). The deposition of bioaerosols is critical for both technologies, and the particle diameter in the range of 100nm to 300 nm is the most difficult to capture. Bioaerosol diameters and airflow conditions govern the deposition of aerosols on surfaces within HVAC ducts. In this work, both simulations and experiments are performed to investigate deposition for particle sizes ranging from 100nm to 300nm. Lagrangian particle track code is developed to analyze the deposition efficiency in a duct-based geometry. Particle size distribution measurements of aerosolized 200 nm polystyrene latex particles performed inside a HVAC duct. The results showed that aerosolized polystyrene latex particles had a geometric mean of 115.16 nm and a geometric stand deviation of 2.12. This result is important to understand the deposition behavior experimentally.

Source:

Purdue University / 2023

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Co-authors:

Youyi Zhou