A concentration rebound method for measuring particle penetrationand deposition in the indoor environment

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Continuous, size resolved particle measurements were performed in two houses in order to determine size-dependent particle penetration and deposition in the indoor environment. The experiments consisted of three parts: (1) measurement of the particle loss rate following artificial elevation of indoor particle concentrations, (2) rapid reduction in particle concentration through induced ventilation by pressurization of the houses with HEPA-filtered air, and (3) measurement of the particle concentration rebound after house pressurization stopped. During the particle concentration decay period, when indoor concentrations are very high, losses due to deposition are large compared to gains due to particle infiltration. During the concentration ... continued below

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tlthatcher@lbl.gov September 1, 2002.

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Continuous, size resolved particle measurements were performed in two houses in order to determine size-dependent particle penetration and deposition in the indoor environment. The experiments consisted of three parts: (1) measurement of the particle loss rate following artificial elevation of indoor particle concentrations, (2) rapid reduction in particle concentration through induced ventilation by pressurization of the houses with HEPA-filtered air, and (3) measurement of the particle concentration rebound after house pressurization stopped. During the particle concentration decay period, when indoor concentrations are very high, losses due to deposition are large compared to gains due to particle infiltration. During the concentration rebound period, the opposite is true. The large variation in indoor concentration allows the effects of penetration and deposition losses to be separated by the transient, two-parameter model we employed to analyze the data. We found penetration factors between 0.3 and 1 and deposition loss rates between 0.1 and 5 h{sup -1}, for particles between 0.1 and 10 {micro}m.

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  • Journal Name: Aerosol Science and Technology; Journal Volume: 37; Related Information: Journal Publication Date: 2003

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  • Report No.: LBNL--51631
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 900769
  • Archival Resource Key: ark:/67531/metadc886777

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 1, 2002

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 30, 2016, 1:04 p.m.

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tlthatcher@lbl.gov. A concentration rebound method for measuring particle penetrationand deposition in the indoor environment, article, September 1, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc886777/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.