Sj. Cho et al., NUMERICAL-ANALYSIS OF PRESSURE-DROP IN SE PARATOR TYPE FILTER AND ESTIMATION OF ITS OPTIMUM SEPARATOR HEIGHT, Kagaku kogaku ronbunshu, 21(4), 1995, pp. 776-784
Separator-type HEPA filters are composed of elements which have square
cross section bounded by two separator walls and partitioned by a fil
ler medium. Therefore, it is possible to characterize pressure drop of
a separator type air filter unit by studying the pressure drop of the
se filter elements. In the present work, the similarity law for the fl
ow channels including a porous media was discussed and the dimensionle
ss parameters which determine the pressure drop were derived. The dime
nsionless pressure drop was presented as a generalized-pressure drop d
iagram in terms of dimensionless parameters. Furthermore, the results
of numerical analysis for the two-dimensional model filler were compar
ed with those of experiments with two- and three- dimensional model fi
lters. The prediction equation for optimum separator height, which is
the most important factor for designing the filter unit, was presented
as a function of filter media resistance and filter depth.