2 edition of effect of fibre configuration on the efficiency of aerosol filtration found in the catalog.
effect of fibre configuration on the efficiency of aerosol filtration
J. A. Harrop
Written in English
Thesis(Ph.D.) - Loughborough University of Technology 1969.
|Statement||by J.A. Harrop.|
changes in streamline direction near a filter fiber. The particle, due to its inertia, will continue along its original path and hit the filter fiber. This type of filtration mechanism is most predominant when high gas velocities and dense fiber packing of the filter media is present. Figure . Electrospinning of Micro- and Nanofibers: Fundamentals in Separation and Filtration Processes Description. Atmospheric pollution caused by the uncontrolled development of industrial technologies, has now reached the danger point, past which its irreversible effect on natural factors and the resulting danger to living organisms and to future human generations starts outweighing the advantages.
The efficiency of fibrous aerosol filters: Deposition by diffusion of particles of finite diameter. The Canadian Journal of Chemical Engineering , 38 (6), DOI: /cjce S.C Stern, H.W Zeller, A.I Schekman. The aerosol efficiency and pressure drop of a fibrous filter Cited by: Fiber diameter is the main variable responsible for filter efficiency and pressure drop. Efficiency increases rapidly with decreasing fiber diameter. The ratio of nanofiber diameter of commercial filter media to fiber diameter of the commonly used cellulose fibers is approximately equal to
The effects of a carbon fiber ionizer on the collection efficiency of an electret filter for residential house ventilation were investigated with varying the face velocity, the number of ionizers, and the polarity of the ionizer. A Flimmer filter, which was made by a Swedish company, was used as the electret filter. Filtration is an important technology for nanoparticle control and reduction of human exposure to nanoparticles. Filtration by non-circular fibers is gaining more attention in search for better filter quality; elliptical fibers have extra significance because they may be used in simple models of dust by:
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The effect of fibre configuration on the efficiency of aerosol filtration Experimental investigations are carried out using model and real filters.
A monodispersed aerosol, produced by a spinning top generator is used to test the filters, mass determinations being carried out by Author: J.A.
Harrop. Fibre configuration, as embodied in the packing\ud effect, only slightly affects the single fibre efficiency in the\ud inertial region.
There is an increase in the single fibre efficiency between 1 and 3% packing, little effect between 3 and 9%, and\ud further increase at 11%.Author: J.A. Harrop. Aerosol Filtration, book for students, hygiene or process engineers, fibrous media manufacturers, designers, and filtration system suppliers or users addresses the filtration of aerosols in six chapters.
These chapters cover physics and aerosol characterization, the fibrous media, and efficiency and filter clogging by solid or liquid aerosols, with special attention to the filtration of the nanoparticles.
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The effect of fibre configuration on the efficiency of aerosol filtration This item was submitted to Loughborough University’s Institutional Repository by the/an author.
Additional Information: • A Doctoral Thesis. Submitted in partial fulfilment of the requirements for. density of the fibers. Moreover, the single-fiber filtration efficiency (FE) depends on aerosol particle size, fiber diameter, initial velocity of the aerosol particles and surface charges on the fiber and aerosol particles Studies involving fibers made from conventional melt and spinning techniques, where fiber diameters usually run from tens.
(). Collection efficiency of airborne fibers on nylon mesh screens with different pore sizes and configurations. Aerosol Science and Technology: Vol. 53, No. 10, pp. Author: Bon Ki Ku, Gregory Deye. single fiber efficiency due to diffusion single fiber efficiency due to interception INTRODUCTION There havc been extensivc theoretical investiga- tions of filtration mechanisms since the times of Langmuir ().
One of the difficulties that remained in the filtration theories until concerned the treatment of the neighboring fiber interference effect. Experimental Study of Aerosol Filtration 37 made; the output of the present generator is very stable with a concentration fluctuation of less than /, over a 1 hr period.
In filter efficiency tests it is necessary to measure the aerosol concentrations upstream and downstream of the filter as a function of particle size. During wet filtration, aerosol particles are captured by the liquid drops formed on the fibers rather than being directly captured by the fibers, and by providing sufficient liquid, the filter is self-cleaning and filtration efficiency is greatly increased.
Filtration • Air filtration different from liquid filtration • Pore size in air filters generally meaningless as indicator of efficiency • Small particles collected by diffusion, large ones by impaction/interception • Maximum penetration at about Pm • Efficiency increases with increasing air velocity Particle diameter (Pm) 0.
Aerosol Filtration, book for students, hygiene or process engineers, fibrous media manufacturers, designers, and filtration system suppliers or users addresses the filtration of aerosols in six chapters. These chapters cover physics and aerosol characterization, the fibrous media, and efficiency and filter clogging by solid or liquid aerosols.
In general, filtration efficiency increased with increasing basis weight as there were more fibers to capture aerosols in either single layer or multilayer configuration. However, the behaviour differed between the two configurations.
AEROSOL FILTRATION BY FIBROUS FILTERS--I. THEORETICAL* HsU-CHI YEHf and BENJAMIN Y. LIU~ (First received 29 May ; in revised form 18 September ) Abstract--Current theory of aerosol filtration by fibrous filters is based on the Kuwabara Happel flow field for the cell Size: KB.
In filtration of particle sizes with submicrons, the same filter efficiency can be achieved at a lower pressure drop with smaller fiber sizes, or conversely, better filter efficiency can be achieved at the same pressure drop .
For nanometer-scale fibers, the effect of the slip flow at the fiber surface has to be taken into account. Aerosol Filtration And Separation Tachih Hsiao Chapter 5: Effect of Geometric Configuration on the Collection Efficiency for Axial Flow Cyclones 1. Introduction 2. Design of Axial Flow Cyclone Figure Loading curves for the glass fiber filter loaded with particles coated with.
The aim of this article is to contribute to the qualitative description of the phenomena occurring during the clogging of fibre filters by submicron liquid particles. The changes in the pressure drop and efficiency of the filtration media in relation to the generated aerosol mass Cited by: Macroscopic Description of Filter Behaviour.
Surface filtration and depth filtration. Types of filter. Method of filtration and assessment of efficiency. Layer efficiency. Single fibre efficiency. Filter Structure. Introduction. Paper filters. Carded filters. Porous foam. Model filters. Flow Patterns and Pressure Drop.
Nature of airflow through a Edition: 1. (). The Influence of Fiber Geometry and Orientation Angle on Filtration Performance. Aerosol Science and Technology: Vol. 49, No. 2, pp. Cited by: The filtration efficiency of Nylon 6 nanofilters is % superior to the commercialized HEPA filter at the face velocity of 5cm/s using μm test particles.
Filtration is an important technology for nanoparticle control and reduction of human exposure to nanoparticles. Filtration by non-circular fibers is gaining more attention in search for better filter quality; elliptical fibers have extra significance because they may be used in simple models of dust loading.
We carry out numerical simulation to investigate filtration by fibers with elliptical Cited by:. Filtration of aerosol particles using non-woven fibrous media is a common practice for air cleaning.
It has found wide applications in industries and our daily : Chuanfang Yang. i want to calculate single fibre filtration efficiency of nanofibers can any one let me know that µ - air dynamic viscisity in kg/m.s @ 25˚c, T- absolute temperature in kelvin @ 25˚c, λ-mean.Topics include new filtration materials, filter testing methods, electrically enhanced filtration, mechanical and chemical filter resistivity, computational models, and much more.
This book examines the history and development of aerosol filtration science and also considers research needs for the future. (source: Nielsen Book Data).