Evolution of the efficiency and pressure drop of a filter media with loading
Identifieur interne : 001C31 ( Main/Exploration ); précédent : 001C30; suivant : 001C32Evolution of the efficiency and pressure drop of a filter media with loading
Auteurs : D. Bemer [France] ; S. Calle [France]Source :
- Aerosol science and technology [ 0278-6826 ] ; 2000.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Aérosol.
English descriptors
- KwdEn :
Abstract
A model for calculating the filtration efficiency and the pressure drop of a fiber filter media in dynamic regime was used and modified to take account of both the fiber and the particle size distributions. Measurements were carried out on two medias employed in industry and two loading aerosols to test the possibilities offered by the model to predict the evolution of both the efficiency and pressure drop characteristics. The results show that the model satisfactorily reflects the variations in efficiency and pressure drop of a media with respect to the loading if its structure is homogeneous and if the deposit of particles takes place within the thickness of the filtering layer. On the other hand, the divergence between the model and practical experience becomes significant as soon as surface filtration regime occurs or when the media has a heterogeneous structure. A test rig was developed to determine the filtering characteristics, such as fractional efficiency and pressure drop in relation to the degree of loading, from aerosols of various particle sizes. This study has highlighted the necessity of taking into account the influence of loading in the methods for testing filters, especially those used in the industry, and demonstrates that the particle size of the test aerosol is a very sensitive parameter.
Affiliations:
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Bemer</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Inrs. Ventilation Department.</s1><s2>54600 Vandoeuvre</s2><s3>FRA</s3><sZ>1 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Vandoeuvre</settlement></placeName></affiliation></author><author><name sortKey="Calle, S" sort="Calle, S" uniqKey="Calle S" first="S." last="Calle">S. Calle</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>CNRS. LSGC</s1><s2>54000 Nancy</s2><s3>FRA</s3><sZ>2 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region><settlement type="city">Nancy</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Aerosol science and technology</title><title level="j" type="abbreviated">Aerosol sci. tech.</title><idno type="ISSN">0278-6826</idno><imprint><date when="2000">2000</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Aerosol science and technology</title><title level="j" type="abbreviated">Aerosol sci. tech.</title><idno type="ISSN">0278-6826</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aerosols</term><term>Air filter</term><term>Air filtration</term><term>Dynamic conditions</term><term>Experimental study</term><term>Fiber filter</term><term>Filter medium</term><term>Gas solid</term><term>Hydrodynamics</term><term>Modeling</term><term>Particle size</term><term>Performance</term><term>Pressure drop</term><term>Semiempirical method</term><term>Size effect</term><term>Suspended particle</term><term>Theoretical study</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Filtration air</term><term>Gaz solide</term><term>Particule en suspension</term><term>Aérosol</term><term>Filtre air</term><term>Filtre fibre</term><term>Milieu filtrant</term><term>Régime dynamique</term><term>Hydrodynamique</term><term>Perte charge</term><term>Performance</term><term>Effet dimensionnel</term><term>Dimension particule</term><term>Modélisation</term><term>Méthode semiempirique</term><term>Etude théorique</term><term>Etude expérimentale</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Aérosol</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A model for calculating the filtration efficiency and the pressure drop of a fiber filter media in dynamic regime was used and modified to take account of both the fiber and the particle size distributions. Measurements were carried out on two medias employed in industry and two loading aerosols to test the possibilities offered by the model to predict the evolution of both the efficiency and pressure drop characteristics. The results show that the model satisfactorily reflects the variations in efficiency and pressure drop of a media with respect to the loading if its structure is homogeneous and if the deposit of particles takes place within the thickness of the filtering layer. On the other hand, the divergence between the model and practical experience becomes significant as soon as surface filtration regime occurs or when the media has a heterogeneous structure. A test rig was developed to determine the filtering characteristics, such as fractional efficiency and pressure drop in relation to the degree of loading, from aerosols of various particle sizes. This study has highlighted the necessity of taking into account the influence of loading in the methods for testing filters, especially those used in the industry, and demonstrates that the particle size of the test aerosol is a very sensitive parameter.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Nancy</li><li>Vandoeuvre</li></settlement></list><tree><country name="France"><region name="Grand Est"><name sortKey="Bemer, D" sort="Bemer, D" uniqKey="Bemer D" first="D." last="Bemer">D. Bemer</name></region><name sortKey="Calle, S" sort="Calle, S" uniqKey="Calle S" first="S." last="Calle">S. Calle</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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