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Some observations on air movements in clean rooms with unidirectional air flow.

Author(s) : LJUNGQVIST B., REINMULLER B.

Summary

In clean process production, unidirectional air flow with high-efficiency particulate-filtered (HEPA) air is used, either in the entire room or partly in the critical process region (clean air zones). The paper describes a number of observations in unidirectional air flow and discusses the interaction between air movements and the dispersion of airborne contaminants. It has been shown, by using smoke photography technique, that wake regions and vortex streets can easily be formed behind the working operator and objects. If a contaminant is emitted in the region of a vortex an accumulation can occur. It is important for the user to investigate that such vortices do not occur in the clean working zone.

Details

  • Original title: Some observations on air movements in clean rooms with unidirectional air flow.
  • Record ID : 1995-1808
  • Languages: English
  • Source: ROOMVENT '94. Air distribution in rooms. Proceedings.
  • Publication date: 1994/06/15
  • Document available for consultation in the library of the IIR headquarters only.

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