Experimental Study of Submicrometer and Ultrafine Particle Penetration and Pressure Drop for High Efficiency Filters

摘要: The fractional penetration of submicrometer particles through five high-efficiency glass fiber filters, one composite filter, and two membrane filters was measured for 0.004–0.42-μm diameter at filter face velocities ranging from 0.5 to 20 cm/s. all had approximately the same thickness weight per unit area, were rated 93% 99.999% efficient using conventional 0.3-μm dioctyl phthalate (DOP) test. challenge aerosols electrically classified monodisperse DOP in range 0.032–0.42 μm, polydisperse silver condensation having diameters ∼ 0.004–0.01 μm. Aerosol these media found be generally consistent with current theory collection by diffusion interception over particle size velocity studied. Using a figure merit calculated 0.1- facilitate comparison, except tetrafluoroethylene ...