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Author: Jim Chuin Yin
Publisher:
ISBN:
Category :
Languages : en
Pages : 248
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Book Description
Author: Jim Chuin Yin
Publisher:
ISBN:
Category :
Languages : en
Pages : 248
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Book Description
Author: Kvetoslav R. Spurny
Publisher: CRC Press
ISBN: 9780873718301
Category : Nature
Languages : en
Pages : 564
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Book Description
Aerosols are generally associated with damaging effects to the ozone and human health, however, some aerosols enable productions of very clean, highly dispersed materials. Advances in Aerosol Filtration is dedicated to progress in aerosol science, presenting newly developed theories, filtration models, and novel applications of aerosol gas filtration. 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.
Author: Qisheng Ou
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 208
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Book Description
Particle control technologies are essential in many manufacturing industries (electronic and chemical industrial, mineral processing, and food and beverages) as well as in pollution abatement and environmental control (for example, post processing of power plant emissions and clean rooms). A variety of particle control technologies using various mechanisms have been developed. Among these technologies, filtration is known as the most economical for achieving high removal efficiency of fine aerosol particles. In numerous existing studies on the loading process of particle filtration, two assumptions are usually made: (1) particles are spherical or nearly spherical in shape and (2) particles are uniformly deposited on filter medium. However, in practical applications, these two assumptions are not always met. Agglomerate particles with non-spherical shape are ubiquitous in industrial processing and ambient environment, and non-uniform particle depositions are often met. The overall objective of this dissertation is to advance our current knowledge on these two specific areas of aerosol filtration: (1) agglomerate particle filtration and (2) particle deposition uniformity. For the first part, Agglomerate Particle Filtration, a system which is able to generate stable and controllable agglomerate particles was developed. Both branch-like and chain-like agglomerate particles were generated through the system, and their morphologies were characterized using both online and offline methods. Series of filter loading experiments were performed to study the filtration behavior of fibrous filters loaded with agglomerate particles over the entire filter lifetime, including the initial filtration, depth filtration, transition filtration and surface filtration. The filtration and loading of agglomerate particles exhibited different behaviors than those of spherical particles. Different effects, including filter media, fractal dimension of agglomerate particles, and the overall mobility size of agglomerate particles, on the loading behavior were explored. Moreover, for predicting the loading behavior of agglomerate particles, two semi-empirical models were proposed by modifying existing models. Good agreements were found for both of them. For the second part, Particle Deposition Uniformity, particle depositions under two scenarios were investigated. In the first scenario, particle deposition along pleated filter panels was studied using a COMSOL-Matlab based numerical model. The evolutions of particle deposition profile and pressure drop of pleated filter panels during dynamic particle loading process were investigated. The model was validated by experimental loading tests. In the second scenario, particle deposition uniformity on HVAC entrance filter panels installed in an aircraft was studied by a computational fluid dynamics model. The flow fields around entrance filter panels and particle depositions on them were investigated. Factors affecting particle deposition uniformity were identified and explored.
Author: Lars Ström
Publisher:
ISBN:
Category :
Languages : en
Pages : 33
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Book Description
Author: David Neal Plotkin
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
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Book Description
Author: L. Ström
Publisher:
ISBN:
Category :
Languages : sv
Pages : 59
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Book Description
Author: Chi Tien
Publisher: Butterworth-Heinemann
ISBN: 1483162427
Category : Science
Languages : en
Pages : 380
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Book Description
Granular Filtration of Aerosols and Hydrosols is concerned with the fundamental aspects of granular filtration of both liquid and gas suspensions. This book takes a unifying approach to the treatment of granular aerosol and hydrosol filtration. The text begins with the introduction of the process of granular filtration and its various applications. Subsequent chapters discuss the aspects of filtration, such as, the macroscopic description of fixed-bed granular filtration; the methods for making representations based on various porous media models for both clean and clogged filter media; the mechanisms of particle deposition; and the trajectory analysis of particle deposition. The final chapter presents and discusses case studies which deal with predicting and calculating the dynamic behavior of granular filtration of hydrosols and aerosols. Researchers in granular filtration and graduate students dealing with separation technology will find the book highly useful.
Author: Chi Tien
Publisher: Elsevier
ISBN: 0080547206
Category : Computers
Languages : en
Pages : 534
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Book Description
Granular filtration is a technique used extensively in the water and sewage industries, and we would all be quickly aware if it did not work properly. Designing and building an effective granular filter is a science and an art: this book covers both aspects. The theoretical basis of design is given considerable exposure, as are the behavioural characteristics of particles and fluids. This new edition contains extra material on stochastic simulations and the Lattice Bolzmann approach for studying deposition in granular media; more on prediction methods for collection efficiency, and a chapter on the various available software programmes. - Written by the world's leading expert on depth filtration - Fully updated to include the latest approaches to studying granular filtration
Author: Dominique Thomas
Publisher: Elsevier
ISBN: 008102116X
Category : Science
Languages : en
Pages : 228
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Book Description
Filtration of aerosols is omnipresent in our daily lives, in areas as diverse as health, the protection of people and the environment, and air treatment inside buildings. However, the collection of particles within a filter media is not, contrary to popular belief, linked to a simple screen effect. The phenomena involved are much more complex and require the consideration of aerosol interactions, filter media and process conditions to select the best fiber filter for a given application. 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. - Analyses the behavior of fibrous media against solid and liquid aerosols - Presents models of efficiency and pressure drop - Introduces computing elements for estimating the lifetime of filters - Provides guidance for designing filters and predicting their behavior over time
Author: W. E. Ranz
Publisher:
ISBN:
Category : Aerosols
Languages : en
Pages : 194
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Book Description
The impactions of small particles on cylindrical and spherical collectors was analyzed in terms of the forces which affect the motion of a particle and cause it to move from an aerosol stream onto a collecting surface. Dimensionless parameters which characterize the various mechanisms of collection are defined for inertial separation, interception, electrical attraction, and random molecular motion. Significant values of the parameters were determined. The various theories of impaction of aerosol particles on simple collectors were investigated and extended to a comprehensive statement of the general problem of impaction efficiencies. Practical applications to dust and smoke removal systems are indicated.
