Optimization of Pleated Filter Designs Using a Finite-Element Numerical Model

Abstract

A numerical model has been developed to optimize the design of pleated filter panels. In this model, the fluid flow is modeled by a steady laminar flow and the filter media resistance is governed by the Darcy-LapwoodBrinkman equation. A finite element method with a nine-node Lagrangian element is used to solve the governing equations. For the rectangularly pleated filter panel, the numerical results agree well with the analytical model of Yu and Goulding (1992) and with his experimental data. The pressure drop increases a t small pleat count due to increased media face velocity, and a t large pleat count due to increased viscous drag in the pleat spacings. Therefore, an optimal pleat count for minimum pressure drop exists at a certain pleat height for each filter media type. The optimization of rectangular pleated filters, e.g., mini-pleated filter panels, has been performed for six commercial filter media. The optimal pleat count is shown to increase with decreasing media permeability of the filter media. A generalized correlation curve has been found for the six filter media by using a nondimensional parameter analysis. The results can be used to design pleated filter panels with minimum pressure drop.

Influence of pleat geometry on filter cleaning in PTFE/glass composite filter

“…However, the cleaning efficiency highly depends on the filter geometry (Lo et al, 2010). Recently, interest in a pleated filter has been getting higher in terms of the aspects of increasing the treating capacity of exhaust gas and decreasing the installation space of the bag house (Chen et al, 1995;Wang, 2009). The cleaning interval of a pleated filter bag can be increased more than twice at the same flow rate, and filter lifetime can also be increased, because a pleated filter has approximately two to four times the filtration area of a cylindrical filter with the same dimensions.…”

Computational fluid dynamics simulations and tests for improving industrial-grade gas mask canisters

“…Typically, previous studies proposing optimized designs according to minimal pressure drops have emphasized designing filters with multipleated configurations and investigating the multipleating effect on pressure drops and flow structures. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Because of the high requirements for protection or respirator specifications, the inhalation pressure drops of CBRN gas mask canisters exceed those of general industrial-grade canisters. Thus, the aerodynamic behavior of low-pressure drops is crucial in designing CBRN gas mask canisters.…”

Combined Depth and Cake Filtration Model Coupled with Flow Simulation for Flat and Pleated Filters

“…Due to symmetry reasons, just half of the filter pleat is used [9]. A part of the body-fitted grid is indicated in Fig.…”

“…The starting point is the simulation of the fluid flow in the filter housing and through the media which are among others helpful to identify an optimal pleat count and/or shape [9][10][11][12]. In the literature, several algorithmic approaches for the prediction of the evolution of efficiency and pressure drop during the loading of filters can be found.…”