<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>10</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Siegel, J.A.</style></author><author><style face="normal" font="default" size="100%">William W. Nazaroff</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Modeling Particle Deposition on HVAC Heat Exchangers</style></title><secondary-title><style face="normal" font="default" size="100%">Proceedings of the Indoor Air 2002 Conference, Monterey, CA</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2002</style></year></dates><publisher><style face="normal" font="default" size="100%">Indoor Air 2002, Santa Cruz, CA</style></publisher><volume><style face="normal" font="default" size="100%">1</style></volume><pages><style face="normal" font="default" size="100%">521-526</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Fouling of fin-and-tube heat exchangers by particle deposition leads to diminished effectiveness in  supplying ventilation and air conditioning.  This paper explores mechanisms that cause particle deposition  on heat exchanger surfaces.  We present a model that accounts for impaction, diffusion, gravitational  settling, and turbulence.  Simulation results suggest that some submicron particles deposit in the heat  exchanger core, but do not cause significant performance impacts.  Particles between 1 and 10 µm deposit  with probabilities ranging from 1 -- 20 % with fin edge impaction representing the dominant mechanism.   Particles larger than 10 µm deposit by impaction on refrigerant tubes, gravitational settling on fin  corrugations, and mechanisms associated with turbulent airflow.  The model results agree reasonably well  with experimental data, but the deposition of larger particles at high velocities is underpredicted.   Geometric factors, such as discontinuities in the fins, are hypothesized to be responsible for the  discrepancy.</style></abstract><custom1><style face="normal" font="default" size="100%">0,2.5</style></custom1><custom2><style face="normal" font="default" size="100%">LBNL-49339</style></custom2><section><style face="normal" font="default" size="100%">Chapter</style></section></record></records></xml>