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Influence of filtration on I/O particle concentration ratios at urban office buildings

Quang, Tran Ngoc, He, Congrong, Morawska, Lidia, & Knibbs, Luke D. (2012) Influence of filtration on I/O particle concentration ratios at urban office buildings. In Healthy Buildings 2012, 10th International Conference, Official Conference of the International Society of Indoor Air Quality and Climate, 8-12 July 2012, Brsibane Exhibition and Convention Centre, Brisbane, QLD. (Unpublished)

Abstract

Epidemiological research has consistently shown an association between fine and ultrafine particle concentrations, and increases in both respiratory and cardiovascular morbidity and mortality. These particles, often found in vehicle emissions outside buildings, can penetrate inside via their envelopes and mechanically ventilated systems. Indoor activities such as printing, cooking and cleaning, as well as the movement of building occupants are also an additional source of these particles. In this context, the filtration systems of mechanically ventilated buildings can reduce indoor particle concentrations. Several studies have quantified the efficiency of dry-media and electrostatic filters, but they mainly focused on the particle size range > 300 nm. Some others studied ultrafine particles but their investigations were conducted in laboratories. At this point, there is still only limited information on in situ filter efficiency and an incomplete understanding of filtration influence on I/O ratios of particle concentrations. To help address these gaps in knowledge and provide new information for the selection of appropriate filter types in office building HVAC systems, we aimed to:

(1) measure particle concentrations at up and down stream flows of filter devices, as well as outdoor and indoor office buildings;

(2) quantify efficiency of different filter types at different buildings; and

(3) assess the impact of these filters on I/O ratios at different indoor and outdoor source operation scenarios.

Impact and interest:

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ID Code: 54365
Item Type: Conference Paper
Keywords: ultrafine particle, particle size distribution, deep bed filter, electrostatic filter, efficiency
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100)
Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000) > ENVIRONMENTAL SCIENCE AND MANAGEMENT (050200) > Environmental Monitoring (050206)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 The Authors
Deposited On: 29 Oct 2012 16:01
Last Modified: 14 Sep 2013 06:14

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