Effects of room furnishings and air speed on particle depositionrates indoors

PDF Version Also Available for Download.

Description

Particle deposition to surfaces plays an important role in determining exposures to indoor particles. However, the effects of furnishings and air speed on these rates have not been well characterized. In this study, experiments were performed in an isolated room (volume = 14.2 m{sup 3}) using three different indoor furnishing levels (bare, carpeted and fully furnished) and four different airflow conditions. Deposition loss rates were determined by generating a short burst of polydispersed particles, then measuring the size-resolved (0.5-10 {micro}m) concentration decay rate using an aerodynamic particle sizer. Increasing the surface area from bare (35 m{sup 2} nominal surface area) ... continued below

Creation Information

Thatcher, Tracy L.; Lai, Alvin C.K.; Moreno-Jackson, Rosa; Sextro, Richard G. & Nazaroff, William W. June 1, 2002.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

Particle deposition to surfaces plays an important role in determining exposures to indoor particles. However, the effects of furnishings and air speed on these rates have not been well characterized. In this study, experiments were performed in an isolated room (volume = 14.2 m{sup 3}) using three different indoor furnishing levels (bare, carpeted and fully furnished) and four different airflow conditions. Deposition loss rates were determined by generating a short burst of polydispersed particles, then measuring the size-resolved (0.5-10 {micro}m) concentration decay rate using an aerodynamic particle sizer. Increasing the surface area from bare (35 m{sup 2} nominal surface area) to fully furnished (12 m{sup 2} additional surface area) increased the deposition loss rate by as much as a factor of 2.6, with the largest increase seen for the smallest particles. Increasing the mean airspeed from < 5 cms/s to 19 cm/s, by means of increasing fan speed, increased the deposition rate for all particle sizes studied by factors ranging from 1.3 to 2.4, with larger particles exhibiting greater effects than smaller particles. The significant effect of particle size and room conditions on deposition loss rates argues against using a single first-order loss-rate coefficient to represent deposition for integrated mass measurements (PM{sub 2.5} or PM{sub 10}).

Source

  • Journal Name: Atmospheric Environment; Journal Volume: 36; Journal Issue: 11; Related Information: Journal Publication Date: January 15,2002

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LBNL--48414
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1016/S1352-2310(02)00157-7 | External Link
  • Office of Scientific & Technical Information Report Number: 918652
  • Archival Resource Key: ark:/67531/metadc887593

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • June 1, 2002

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Sept. 29, 2016, 2:31 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 7

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Thatcher, Tracy L.; Lai, Alvin C.K.; Moreno-Jackson, Rosa; Sextro, Richard G. & Nazaroff, William W. Effects of room furnishings and air speed on particle depositionrates indoors, article, June 1, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc887593/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.