Influence of pleated geometry on the pressure drop of filters during dust loading process: experimental and modelling study

Teng, Guangping; Shi, Guoqing; Zhu, Jintuo

doi:10.1038/s41598-022-24838-7

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…At the same time, the mass of dust retained per unit area of filtration takes smaller values. Such a phenomenon was observed during numerical studies of fibrous materials [32][33][34][35] and experimental studies of the "cyclone-filter paper" assembly [22,36].…”

Section: Authormentioning

confidence: 79%

Experimental Study of a PowerCore Filter Bed Operating in a Two-Stage System for Cleaning the Inlet Air of Internal Combustion Engines

Dziubak

2023

Energies

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Small dust grains cause a higher intensity of increase in the flow resistance of the fibrous filter bed, which, due to the established value of the permissible resistance, results in a shorter period of operation of the air filter and the vehicle. At the same time, the mass of dust per unit of filtration area takes on smaller values. Such a phenomenon occurs in the two-stage “multicyclone-baffle filter” engine inlet air filtration system. The main objective of this study was to experimentally determine the mass of dust retained per unit of filtration area (dust absorption coefficient km) of the PowerCore filter bed operating under two-stage filtration conditions, which cannot be found in the available literature. The original methodology and conditions for determining the dust absorption coefficient km of a PowerCore filter bed operating under two-stage filtration conditions are presented. Tests were carried out on the characteristics of filtration efficiency and accuracy, as well as on the flow resistance of a filtration unit consisting of a single cyclone and a PowerCore test filter with an appropriately selected surface area of filter material. During the tests, conditions corresponding to the actual conditions of vehicle use and air filter operation were maintained, including filtration speed and the dust concentration in the air. The experimentally determined dust absorption coefficient of the PowerCore research filters operating in a two-stage filtration system took on values in the range of km = 199–219 g/m2. The dust absorption coefficient km of the PowerCore research filter operating under single-stage filtration conditions reached a value of km = 434 g/m2, which is twice as high. Prediction of the mileage of a car equipped with a single-stage and two-stage “multi-cyclone-partition” filtration system was carried out, showing the usefulness of the experimentally determined dust absorption coefficients km.

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Section: Authormentioning

confidence: 79%

Experimental Study of a PowerCore Filter Bed Operating in a Two-Stage System for Cleaning the Inlet Air of Internal Combustion Engines

Dziubak

2023

Energies

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“…This has led to numerous studies on simulating the porous filter media through numerical simulation. Some notable studies include Tsang [4] and Lintai et al [5] who investigated the effect of pleat shape on the pressure drop of the filter [6]. The numerical investigation of Tsang shows that the triangular pleat shape is more aerodynamically favourable than the rectangular pleat shape, which causes less viscous drag, thus reducing the pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Effects of the filter media pack configurations on the air filtration performance

Chong,

Poon

2024

IOP Conf. Ser.: Earth Environ. Sci.

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High efficiency particulate air (HEPA) filters are widely used in various industries to contain airborne contamination. The pressure drop of the filters is a crucial performance parameter when designing a HEPA filter as it is the resistance that the filter offers to the flow of air. Thus, it is critical to find the effect of each configuration and integrate an optimal setup for the filter to avoid high-pressure drops. Set against these backgrounds, this study aims to study the effect of different configurations on the total pressure drop of the filter, and to review how each configuration can affect each other using a commercial software ANSYS Fluent. The different filter media pack configurations and boundary conditions investigated here are including pleat shape (V-shaped and U-shaped), pleat density (1-7 pleat/cm), pleat height (1cm, 1.3cm), and inlet velocity (0.02-0.2 m/s) on the pressure drop of the filter. A two-dimensional geometrical model is developed, and then validated with respect to the data obtained from Lydall M3004-06 property sheet. Upon successful validation exercise, a series of parametric studies is conducted to numerically examine the impact of changing each configuration on the total pressure drop of the filter. Results show that an optimal pleat density is attained where the total pressure drop is minimized, i.e., 3 pleat/cm for V-shaped and 4 pleat/cm for U-shaped for inlet velocity of 0.02 m/s. At a constant inlet velocity, the U-shaped pleat has a lower pressure drop than the V-shaped pleat at low pleat densities, but a higher pressure drop at higher densities. This behaviour can be attributed to the balance between inertial and viscous resistance. Increasing the inlet velocity increases the total pressure drop for all pleat heights and decreases the optimal pleat density. This effect is less pronounced on the V-shaped pleat. Increasing the pleat height for the U-shaped pleat decreases the pressure drop and optimal pleat density but increases pressure drop in the viscous dominated region. Conversely, increasing the pleat height for the V-shaped pleat decreases the pressure drop for all pleat counts and only decreases the optimal pleat density at high velocity.

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“…The pleating of the filter media can lead to the change of flow field [ 7 – 10 ], resulting in the uneven deposition of dust particles which in turn affects the evolution of the pressure drop [ 11 – 13 ]. Therefore, the flow field of the pleated filters and the uneven deposition of dust particles are to be investigated.…”

Section: Introductionmentioning

confidence: 99%

“…Variations in the flow field due to the pleated structure of the cartridge can lead to uneven deposition of dust particles [ 10 – 13 ]. Bourrous et al [ 21 ] observation of the formation of dust cake by camera, but only at the pleat inlet and not inside the pleats.…”

Section: Introductionmentioning

confidence: 99%

A numerical simulation method for pressure drop and normal air velocity of pleated filters during dust loading

et al. 2023

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Pressure drop is an important indicator that affects the filtration performance of the pleated filter, and the deposition of dust particles within the pleats is crucial to the evolution of the pressure drop. In this study, the pressure drop during PM10 loading process was investigated for a series of V-shaped and U-shaped filters with a pleat height of 20 mm and different pleat ratios (the ratio of pleat height to pleat width: α = 0.71–3.57). In the numerical simulations, numerical models suitable for different pleated geometries were obtained through experimental verification on the local air velocity. Then, assuming that the dust cake thickness is proportional to the normal air velocity of the filters, the variation of the pressure drop with the dust deposition is derived by means of successive numerical simulations. This simulation method saved a significant amount of CPU time required for the growth of dust cake. It was found that the relative average deviations between experimental and simulated pressure drops were 3.12% and 1.19% for V-shaped and U-shaped filters, respectively. Furthermore, it was found that under the same pleat ratio and the mass of dust deposition per unit area, both the pressure drop and unevenness of normal air velocity of the U-shaped filter were lower than the V-shaped filter. Therefore, the U-shaped filter is recommended due to its better filtration performance.

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Influence of pleated geometry on the pressure drop of filters during dust loading process: experimental and modelling study

Cited by 7 publications

References 34 publications

Experimental Study of a PowerCore Filter Bed Operating in a Two-Stage System for Cleaning the Inlet Air of Internal Combustion Engines

Experimental Study of a PowerCore Filter Bed Operating in a Two-Stage System for Cleaning the Inlet Air of Internal Combustion Engines

Effects of the filter media pack configurations on the air filtration performance

A numerical simulation method for pressure drop and normal air velocity of pleated filters during dust loading

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