Investigation of room ventilation for improved operation of a downdraft table

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We report a computational fluid dynamics (CFD) study on containment of airborne hazardous materials in a ventilated room containing a downdraft table. Specifically, we investigate the containment of hazardous airborne material obtainable under a range of ventilation configurations. The desirable ventilation configuration should ensure excellent containment of the hazardous material released from the workspace above the downdraft table. However, increased airflow raises operation costs, so the airflow should be as low as feasible without compromising containment. The airflow is modeled using Reynolds Averaged Navier Stokes equations with a high Reynolds number k-epsilon turbulence model. CFD predictions are examined for several ... continued below

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7 pages

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Jayaraman, B.; Kristoffersen, A.; Finlayson, E. & Gadgil, A. May 1, 2004.

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Description

We report a computational fluid dynamics (CFD) study on containment of airborne hazardous materials in a ventilated room containing a downdraft table. Specifically, we investigate the containment of hazardous airborne material obtainable under a range of ventilation configurations. The desirable ventilation configuration should ensure excellent containment of the hazardous material released from the workspace above the downdraft table. However, increased airflow raises operation costs, so the airflow should be as low as feasible without compromising containment. The airflow is modeled using Reynolds Averaged Navier Stokes equations with a high Reynolds number k-epsilon turbulence model. CFD predictions are examined for several ventilation configurations. Based on this study, we find that substantial improvements in containment are possible concurrent with a significant reduction in airflow, compared to the existing design of ventilation configuration.

Physical Description

7 pages

Notes

OSTI as DE00835163

Source

  • Room Vent 2004 9th International Conference on Air Distribution in Rooms Room Vent 2004 - 9th International Conference on Air Distribution in Rooms, Coimbra (PT), 09/05/2004--09/08/2004

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  • Report No.: LBNL--55561
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 835163
  • Archival Resource Key: ark:/67531/metadc780680

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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.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • May 1, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Nov. 29, 2017, 12:59 p.m.

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Jayaraman, B.; Kristoffersen, A.; Finlayson, E. & Gadgil, A. Investigation of room ventilation for improved operation of a downdraft table, article, May 1, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc780680/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.