Computational Modeling of High-efficiency Air Filter Media and Its Structural Design

Abstract

For removing solid particles fibrous nonwoven filter media are widely utilized. For estimation of filter characteristics, the pressure drop and particle collection efficiency are used. To predict filter efficiency and pressure drop of high efficiency air filters, efficiency of a single fiber has been extensively investigated. The filter characteristics depend generally on the structure of the filter, operating conditions and characteristics of the filtration particles. However, the relationship between filter structures and their properties was not established clearly. In this study, several multi-layered filter media such as, meltblown and spunbond nonwovens were designed and the modeling of pressure drop and filter efficiency were developed with experimental values. As well as to investigate the filter characteristics of designed filter media, morphological structures were observed and air permeability, pore size, particle collection efficiency and pressure drop were measured experimentally