Authors:

Kazim Hussain Jafri

Date Created:

Not specified

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About Paper:

Innovative indoor air filtration systems are required to reduce indoor air pollution. Current high efficiency filtration systems have limitations on capturing particles within the most penetrating size ranges and impose enormous pressure drops. Additionally, the se methods have high energy requirements due to their low operating efficiencies; therefore, new filtration methods need to be investigated. Pretreatment of aerosols using acoustic standing waves have previously been shown to increase rates of gravitational deposition, impaction, interception and other aerosol capture phenomenon through particle agglomeration. The improvements of these capture mechanisms have led to increased capture efficiency of low power air filtration system s. Here, the authors investigate the efficiency enhancements to fiber-based filtration systems through acoustic standing waves placed within immediate proximity of the filter. Polystyrene latex particle spheres ranging from 0.2 to 2 ?m were aerosolized and sprayed into a bench-scale setup . An acoustic radiating plate and ultrasonic transducer were placed immediately preceding a MERV filter. Particle concentrations were measured upstream and downstream of the filter . The authors hypothesize results from this experiment will indicate that filter efficiency increases when acoustic standing waves are introduced. This paper demonstrates the increase in capture efficiency of MERV filters due to acoustically enhanced streaming forces and fluid particle interaction with close proximity to fiber media in energy efficient air filtration systems. Keywords: [no keywords provided]

Source:

Purdue University / 2024

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Co-authors:

Kazim Hussain Jafri