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Airflow and particle control with different ventilation systems in a classroom
KTH, Superseded Departments.ORCID iD: 0000-0003-1882-3833
2003 (English)In: Indoor Air, ISSN 0905-6947, E-ISSN 1600-0668, Vol. 13, no 2, 200-204 p.Article in journal (Refereed) Published
Abstract [en]

Most ventilation and air conditioning systems are designed without much concern about how settling particles behave in ventilation air flows. For displacement ventilation systems, designers normally assume that all pollutants follow the buoyant air flow into an upper zone, where they are evacuated. This is, however, not always true. Previous studies show that high concentrations of settling respirable particles can be found in the breathing zone, and that the exposure rates can be a health hazard to occupants. The emphasis here is on how ventilation systems should be designed to minimize respirable airborne particles in the breathing zone. The supply and exhaust conditions of the ventilation air flow are shown to play an important role in the control of air quality. Computer simulation programs of computational fluid dynamics (CFD) type are used. Particle concentrations, thermal conditions and modified ventilation system solutions are reported.

Place, publisher, year, edition, pages
2003. Vol. 13, no 2, 200-204 p.
Keyword [en]
displacement ventilation, mixing ventilation, particles, system solutions, computational fluid dynamics, classroom, deposition
URN: urn:nbn:se:kth:diva-22518ISI: 000183010800015OAI: diva2:341216
QC 20100525Available from: 2010-08-10 Created: 2010-08-10Bibliographically approved

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