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Contaminant distribution around persons in rooms ventilated by displacement ventilation.

Author(s) : BROHUS H., NIELSEN P. V.

Summary

The paper deals with some of the effects of persons present in a displacement ventilated room, especially the effect on the contaminant distribution. It is demonstrated that although the contaminant distribution is affected, the stratification in the flow is stable when people are moving around in the room. The exposure of a sitting and a standing person in proportion to the stratification height is examined. It is found that the flow in the boundary layer along a person to a great extent is able to entrain air from below the breathing zone. Measurements also show the possible disadvantage when contaminant sources are located in the lower part of the room. Two new quantities, applied in connection with personal exposure in ventilated rooms, are defined.

Details

  • Original title: Contaminant distribution around persons in rooms ventilated by displacement ventilation.
  • Record ID : 1995-1799
  • 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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