Describes a computational fluid dynamics (CFD) analysis to examine the characteristics of contaminated indoor air ventilation in a simplified two-dimensional room model. To evaluate the effectiveness of exhaust openings, introduces a new index, IECV, showing the effectiveness of contaminant ventilation, using the products of the contaminant in the air and the portion of the air vented from an exhaust opening. Then applies these concepts to the more realistic case of inhalation by a human occupant in a room with three-dimensional CFD, assuming the human mouth at inhalation to be an exhaust opening. Finds that the region of inhalation was greatly influenced by the rising stream of air resulting from the heat generated by metabolic activity. Corresponding to the IECV index, defines another new index, IECI, showing the effects of contaminant inhalation. Using IECI and other factors, examines the characteristics of contaminant inhalation by an occupant in the room in detail for some common human postures.
Primary Author(s): Hayashi T, Ishizu Y, et al
Source: Bldg. Environ., March 2002, vol.37, no.3, 219-230, 17 figs, 2 tabs, 11 refs.
BSRIA Abstract Doc 000103036 Abs 20020207
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