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| View Original: | HEPA Filter diagram en.svg (607x544) | |||
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| Keywords: HEPA Filter diagram en.svg diagram showing the main parts of a HEPA filter on the large diagram; its operation is shown on the 3 smaller diagrams the thick brown/tan lines represent fibers in the filter medium the blue lines represent air flow The dark circle represents a particle dust bacteria spore etc the dotted red line represents the trajectory of the particle; consider that as soon as a particle comes within one radius of a fibre it adheres to it in the case of diffusion the particle usually 0 1 µm or smaller has such a trajectory because of the collision with gas molecules On the 100 nm to 1 micron scales that are the most challenging for filters it is helpful to think of air as a viscous fluid like molasses As the fluid flows through the filters particles are carried around the fibers of the filter medium for the most part Inertial impaction Larger particles >1 micron may be massive enough to continue to move in nearly a straight line Newton's Law as the flow is diverted around a fiber Interception Smaller particles are not much affected by inertia but if they are carried within one particle radius of the fiber they will be intercepted by it Diffusion Still smaller particles <100 nm move randomly among streamlines as they are buffeted by collisions with molecules A particle along a streamline that approaches a fiber very closely may be knocked against the fiber by such a collision PGIP Did myself using this sources http //people seas harvard edu/~jones/lab_arch/nano_facilities/hepa gif http //www sage-earth-sciences com/hepa/closeup jpg http //www cdc gov/OD/OHS/biosfty/bsc/fig1 htm http //web princeton edu/sites/ehs/biosafety/biosafetypage/section4 htm http //www freepatentsonline com/7048501-0-large jpg http //www explainthatstuff com/hepafilters html http //www biologicalcontrols com/images/hepa jpg http //www engr psu edu/ae/iec/abe/control/filtration asp http //www biologicalcontrols com/images/fe jpg 2008-08-13 LadyofHats LadyofHats HEPA Filter diagram de svg HEPA Filter diagram es svg HEPA Filter diagram fr svg HEPA Filter diagram ru svg High-Efficiency Particulate Arresting SVG diagrams in English Philip Greenspun illustration project QualityImage Translation possible Quality images - valid vector | ||||
