AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
High Face Velocity (0.5-1.0 m/s) Penetration of sub-50 nm Nanoparticles through HVAC Filter Media Used in Residence
DEQIANG CHANG, Sheng-Chieh Chen, David Y. H. Pui, China Northeastern University, University of Minnesota
Abstract Number: 512 Working Group: Indoor Aerosols
Abstract In HVAC system used in residence, the medium efficiency filter media are usually used for purification and run at high face velocity, about 0.5 m/s to 1.0 m/s. In this operating condition, these filter media can provide satisfactory removal efficiency to fine particles and remain a lower pressure drop. The efficiency of this type of filter media to nanoparticle at such high face velocity is the research content of this paper.
In this study, the penetrations of sub-50 nm nanoparticles through filter media used in HAVC were tested at different face velocity with Ag particles as challenging aerosols. Five types of filter media which were made of different size fibers and have different thickness and charge density were tested. The pressure drops at different face velocity were also recorded. The results show that the penetrations at high filtration velocity is larger than that at low velocity and the Most Penetratiable Particulate Size(MPPS) moves to the smaller particle size range with the face velocity increase.