Modeling filtration performance of pleated fibrous filters by Eulerian-Markov method

Feng, Zhuangbo; Pan, Wuxuan; Wang, Yiwen; Long, Zhengwei

doi:10.1016/j.powtec.2018.09.037

Cited by 18 publications

(7 citation statements)

References 38 publications

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“…Numerical modeling of fibrous filters consists of two steps: air flow and particle filtration modeling. The filter media was modeled as a porous zone and its permeability constant for a porous medium was calculated by the Carman–Kozeny expression ( Feng et al, 2018a ). In the porous zone, source terms ( S i ) were added to the momentum equation, as described in equation (1) .…”

Section: Methodsmentioning

confidence: 99%

“…Once velocity distributions were obtained, particle trajectory and filtration effect were simulated by the Lagrangian method and filtration efficiency model (as described by equation (2 - 3 )). Detailed information about fibrous filter modeling could be found in ( Feng et al, 2018a ).

where u p is the particle velocity vector (m/s), u is the air velocity vector (m/s), t is the time (s), the i represents coordinates (e.g.…”

Section: Methodsmentioning

confidence: 99%

“…For fibrous air filter simulation, the numerical validation case was from previous literature ( Feng et al, 2018a ). The flat filter medium (glass-fiber material) was used, as shown in figure A1 .…”

Section: Appendixmentioning

confidence: 99%

“…The Lagrangian model ( equation (2) ) and particle filtration model ( equation (3) ) were simultaneously utilized to simulate particle motion and filtration in porous filter medium. The detailed information about how to integrating Lagrangian model and filtration model in ANSYS platform could be found in literature ( Feng et al, 2018a ). The inlet air velocity was fixed as 0.4 m/s, which was equal to the filtration air velocity of flat filter medium.…”

Section: Appendixmentioning

confidence: 99%

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Removal of SARS-CoV-2 using UV+Filter in built environment

Feng

Cao

Haghighat

2021

Sustainable Cities and Society

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Air cleaning is an effective and reliable method in indoor airborne SARS-CoV-2 (Severe Acute Respiratory Syndrome Corona-Virus 2) control, with ability of aerosol removal or disinfection. However, traditional air cleaning systems (e.g. fibrous filter, electrostatic removal system) have some risks in operation process, including re-aerosolization and electric breakdown. To avoid these risks, the current study proposed an UV+Filter (ultraviolet and fibrous pleated filter) system to efficiently capture airborne SARS-CoV-2 aerosols and deactivate them in filter medium. It is challenging to quantitatively design UV+Filter due to complex characteristics of SARS-CoV-2 aerosols (e.g. aerodynamic size, biological susceptibility) and hybrid filtration/disinfection processes. This study numerically investigated the overall performances of different air cleaning devices (e.g. Fibrous-filter, UV+Filter, two-stage ESP (electrostatic precipitator) et al.) for removal of SARS-CoV-2 aerosols and compared them in term of filtration efficiency, energy consumption and secondary pollution. The prediction of developed models was validated with the experimental data from literature. UV+Filter is the most reliable and safest, while its energy consumption is highest. The newly proposed design method of air cleaning systems could provide essential tools for airborne diseases control.

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Section: Methodsmentioning

confidence: 99%

where u p is the particle velocity vector (m/s), u is the air velocity vector (m/s), t is the time (s), the i represents coordinates (e.g.…”

Section: Methodsmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

Section: Appendixmentioning

confidence: 99%

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Removal of SARS-CoV-2 using UV+Filter in built environment

Feng

Cao

Haghighat

2021

Sustainable Cities and Society

Self Cite

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“…For this reason, experimental and numerical studies of pleated paper filter cartridges are constantly conducted in order to improve the filtering process of engine intake air [17][18][19][20][21][22][23][24]. Conducted research includes many parameters impact of the paper element, including pleat height and width, spaces between pleats, pleats shape, angle between pleats, filter medium thickness, airflow velocity, filter bed dust loading on separation efficiency and filtration performance and pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

Dziubak¹

2021

IJAME

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The aim of this study is to provide an experimental properties evaluation of a standard filter material (cellulose) and materials with fiber layer addition with small diameters (nanofibers). Filter media, including cellulose, used in the internal combustion engine inlet air filtration are made of high diameter fibres, approx. 15 µm. Significantly higher separation and filtration efficiency performance are obtained for materials with lower fibre diameters (nanofibres), however, at the expense of a significantly higher pressure drop, affecting the engine performance. Filter media manufacturers mainly specify the structure parameters (pore size, air permeability and thickness), without giving any information on the dust filtration performance and rate. The literature includes test results for models of different filter media structures. Filtration process modelling using polydisperse dust with particles of different shape and density and irregular filter media structure is possible using advanced computer techniques, however, the process is complex and requires many simplifications. Test results can be applied directly in the automotive industry. The data can be obtained by experimental tests on filter medium specimens, complete filter elements or air filters which are costly and time-consuming tests, however, those test methods are the most reliable. Conditions and testing methodology for intake air filter materials used in internal combustion engines were developed. Filtration and flow resistance efficiency and accuracy were done depending on test dust mass stopped per unit area. Tested materials filtration efficiency was assessed by a filtration quality factor, which includes experimentally determined efficiency and accuracy as well as flow resistance values. Much higher efficiency and filtration accuracy of dust grains below 5 µm in filtration materials with nanofibers addition compared to standard filtration material (filter paper) were demonstrated. For the same flow resistance values, filter materials with nanofibers addition accumulate smaller dust mass than standard filter paper. Usage of materials with nanofibers addition used in motor vehicles intake air filtration ensures their high efficiency and accuracy. It minimises its components wear, but at the expense of faster flow resistance increase, which shortens filter life and increases filter replacement frequency. Results obtained during the experimental research partly fill the gap when it comes to the basic material properties used in internal combustion engines intake air filter partitions production.

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Kinetic Study on Alloying Element Transfer During an Electroslag Remelting Process

Hou

Wang

et al. 2019

Metall Mater Trans B

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Modeling filtration performance of pleated fibrous filters by Eulerian-Markov method

Cited by 18 publications

References 38 publications

Removal of SARS-CoV-2 using UV+Filter in built environment

Removal of SARS-CoV-2 using UV+Filter in built environment

Material Properties Analysis with Addition of Nanofibres for Air Intake Filtration in Internal Combustion Engines

Kinetic Study on Alloying Element Transfer During an Electroslag Remelting Process

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