CFD analysis of LLNL downdraft table

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Description

This study examines the airflow and contaminant transport in an existing room (89 inch x 77 inch x 98 inch) that houses a downdraft table at LLNL. The facility was designed and built in the 1960's and is currently being considered for redesign. One objective of the redesign is to reduce airflow while maintaining or improving user safety. Because this facility has been used for many years to handle radioactive material it is impractical to conduct extensive experimental tests in it. Therefore, we have performed a Computational Fluid Dynamic (CFD) analysis of the facility. The study examines the current operational ... continued below

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17 pages

Creation Information

Finlayson, Elizabeth U.; Jayaraman, Buvana; Kristoffersen, Astrid R. & Gadgil, Ashok J. October 1, 2003.

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Description

This study examines the airflow and contaminant transport in an existing room (89 inch x 77 inch x 98 inch) that houses a downdraft table at LLNL. The facility was designed and built in the 1960's and is currently being considered for redesign. One objective of the redesign is to reduce airflow while maintaining or improving user safety. Because this facility has been used for many years to handle radioactive material it is impractical to conduct extensive experimental tests in it. Therefore, we have performed a Computational Fluid Dynamic (CFD) analysis of the facility. The study examines the current operational condition and some other cases with reduced airflow. Reducing airflow will lead to savings in operating costs (lower fan power consumption), and possible improvements in containment from reduced turbulence. In addition, we examine three design (geometry) changes. These are: (1) increasing the area of the HVAC inlet on the ceiling, (2) adding a 15{sup o} angled ceiling inlet and (3) increasing the area of the slot in the doorway. Of these three geometry modifications, only the larger doorway slot leads to improved predicted containment.

Physical Description

17 pages

Notes

OSTI as DE00817257

Source

  • Other Information: PBD: 1 Oct 2003

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  • Report No.: LBNL--53883
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/817257 | External Link
  • Office of Scientific & Technical Information Report Number: 817257
  • Archival Resource Key: ark:/67531/metadc734862

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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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Creation Date

  • October 1, 2003

Added to The UNT Digital Library

  • Oct. 18, 2015, 6:40 p.m.

Description Last Updated

  • April 4, 2016, 3 p.m.

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Finlayson, Elizabeth U.; Jayaraman, Buvana; Kristoffersen, Astrid R. & Gadgil, Ashok J. CFD analysis of LLNL downdraft table, report, October 1, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc734862/: accessed October 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.