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CHAMBER SIMULATION OF FINE PARTICLE PENETRATION INTO HOUSES
Citation:
Mosley*, R B. AND D J. Greenwell*. CHAMBER SIMULATION OF FINE PARTICLE PENETRATION INTO HOUSES. Presented at American Filtration Society Meeting, Tampa, FL, 5/1-4/2001.
Description:
the paper discusses chamber simulation of fine particle penetration into houses. (NOTE: A number of recent studies have shown a correlation of negative health effects with increases in outdoor fine particles. Since people spend up to 90% of their time indoors, the relationship between indoor and outdoor fine particles has taken on added significance). The paper describes some results from a study in which the processes of particle removal from infiltrating air by building envelopes are simulated in a chamber, consisting of two compartments, each with a volume of 19 cu m. Particles with aerodynamic diameters in the range of 0.015 to 5 micro-meters are generated in one compartment and then transported through simmulated leakage paths to the other compartment under the action of applied pressure differentials. The simulated leakage paths concist of horizontal slits between aluminum plates. The penetration factor for each size particle is determined by simultaneously measuring the concentrations in the two compartments as a function of time. The penetration factor is ontained by mathematically solving the mass balance equations. The measured value of penetration are compared to predeictions of a mathematical describing deposition by the mechanisms of settling and diffusion.