Modeling the surface filtration pressure drop of PTFE HEPA filter media for low load applications

2020 ◽  
Vol 177 ◽  
pp. 106905 ◽  
Author(s):  
Wanyi Zhang ◽  
Shiming Deng ◽  
Yongxiang Wang ◽  
Zhongping Lin
Keyword(s):  
Pressure Drop ◽  
Filter Media ◽  
Filtration Pressure ◽  
Low Load ◽  
Surface Filtration

Modeling instantaneous pressure drop of pleated thin filter media during dust loading

2011 ◽  
Vol 66 (18) ◽  
pp. 4036-4046 ◽  
Author(s):  
S. Fotovati ◽  
S.A. Hosseini ◽  
H. Vahedi Tafreshi ◽  
B. Pourdeyhimi
Keyword(s):  
Pressure Drop ◽  
Filter Media ◽  
Instantaneous Pressure ◽  
Dust Loading

The Effect of the Dust Cake Resistance on Fluid Flow Passing through the Filter Media

2012 ◽  
Vol 727-728 ◽  
pp. 758-763 ◽  
Author(s):  
Sandra Mara Santana Rocha ◽  
M.S. Bacelos ◽  
João Jorge Ribeiro Damasceno ◽  
L.G.M. Vieira ◽  
M.L. Aguiar
Keyword(s):  
Experimental Data ◽  
Fluid Flow ◽  
Pressure Drop ◽  
Filter Media ◽  
Air Velocity ◽  
Cfd Simulations ◽  
Porosity And Permeability ◽  
Cake Porosity

A filter box was used to obtain the experimental data of filtration operation with different air velocities as 5, 10 and 15 cm/s. The experimental data were compared to the simulated ones using CFD technique. For all range of air velocity and dust cake porosity and permeability employed, data of pressure drop in filter box could be satisfactorily predicted by simulations in CFD. Furthermore, the CFD simulations showed that undesirable patchy cleaning might be overcome using air velocities lower than 15cm/s.

Pressure drop and liquid transport through coalescence filter media used for oil mist filtration

2014 ◽  
Vol 58 ◽  
pp. 313-324 ◽  
Author(s):  
D. Kampa ◽  
S. Wurster ◽  
J. Buzengeiger ◽  
J. Meyer ◽  
G. Kasper
Keyword(s):  
Pressure Drop ◽  
Filter Media ◽  
Liquid Transport ◽  
Oil Mist

Evaluation of the Deposition of Nanoparticles in Fibrous Filter

2014 ◽  
Vol 802 ◽  
pp. 174-179 ◽  
Author(s):  
Priscila Martins de Barros ◽  
Samirys Sara Rodrigues Cirqueira ◽  
Mônica Lopes Aguiar
Keyword(s):  
Pressure Drop ◽  
Specific Resistance ◽  
Filter Medium ◽  
Fibrous Filter ◽  
Filter Performance ◽  
Particle Penetration ◽  
Before And After ◽  
Filtration Stage ◽  
Surface Filtration ◽  
Cellulose Filter

This study aimed to evaluate the deposition of NaCl nanoparticles during filtration in a cellulose filter medium (HEPA). The diameter of the generated polydisperse particles was between 6 and 800nm. Deposition was evaluated with the curves of pressure drop as a function of time. The permeability of the filter medium was determined and, after the deposition of particles, specific resistance of the formed cake was obtained. Filter performance was evaluated by counting particles before and after the filter medium and the pressure drop was monitored in order to obtain the filtration curve. Filtration velocity was kept at 0.06 m/s, and the concentration of the solution generated at a rate of 0.0042 L /min in a commercial inhaler was of 5 g/L. The results showed that this filter showed two steps during the deposition of particles, an internal filtration stage and a surface filtration stage. Although this filter is highly efficient in removing particles in the range evaluated, roughly 100%, particle penetration was observed in the range between 50 and 200nm.

Verification of slip flow in nanofiber filter media through pressure drop measurement at low-pressure conditions

2016 ◽  
Vol 159 ◽  
pp. 100-107 ◽  
Author(s):  
Li Bao ◽  
Kazuya Seki ◽  
Hitoshi Niinuma ◽  
Yoshio Otani ◽  
Ratna Balgis ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Slip Flow ◽  
Low Pressure ◽  
Filter Media
Sign in / Sign up

Export Citation Format

Share Document