Abstract
The air filtration theory demonstrates the existence of a minimum efficiency value for some aerosol particle sizes and velocities. Through experiments, many laboratories have sought to prove this efficiency minimum while using industrial filter pads. Generally used methods, involving monodisperse aerosol generation, are difficult to implement. The authors describe a laboratory experiment ready for semi-industrial application, thanks to the use of a new type of particle counter. A lightly poly dispersed soda-fluorescein (uranin) aerosol is used.
Air filtration concepts are brought to mind and detailed experimental models are described, as well as findings with high-efficiency paper filters, alfa fiber filters, asbestos and fiberglass filters.
Efficiency minimum occurs for 0.15 μm diameter sodafluorescein particles.
Filtration velocity influence on efficiency is also demonstrated. Lastly, the authors compare known results with their soda-fluorescein aerosol and with sodium chloride aerosol findings.
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References
Dorman, R. G.: 1966, in C. N.Davies (ed.), Filtration, Aerosol Science, Academic Press London.
Fuchs, N. A.: 1964, The Mechanics of Aerosols, Pergamon Press, New York.
Green, H. L. and Lane, W. R.: 1964, Particulate Clouds, Dusts, Smokes and Mists, E. and F. N. Spon Ltd, London.
Pich, J.: 1966, in C. N. Davies (ed.), Theory of Aerosol Filtration by Fibrous and Membrane Filter, Aerosol Science, Academic Press, London.
Pradel, J. and Brion, J.: 1970, Méthode d'essais des filtres è haute efficacité par aérosol d'uranine, Thermique et Aéraulique, July–September.
Maigne, J. P.: 1973, Détermination du spectre granulométrique d'un aérosol au moyen d'une batterie de diffusion, Thèse 3ème cycle, Université de Paris VI, Physique des aérosols et pollution atmossphérique.
Dyment, J.: 1969, The Penetration of Glass Fiber Media by Aerosols as a Function of Particle Size and Gas Velocity, UKAEA, AWRE Report No. 05/69.
Stafford, R. G. and Ettinger, H. J.: 1971, Filter Efficiency vs Particle Size and Velocity, Los Alamos Scientific Laboratory, LA-4650, University of California.
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Dupoux, J., Briand, A. Air filter efficiency as a function of particle size and velocity. Water, Air, and Soil Pollution 3, 537–549 (1974). https://doi.org/10.1007/BF00341007
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DOI: https://doi.org/10.1007/BF00341007